source: arduino-1-6-7/trunk/fuentes/arduino-ide-amd64/hardware/tools/avr/lib/gcc/avr/4.8.1/plugin/include/cp/cp-tree.h @ 46

Last change on this file since 46 was 46, checked in by jrpelegrina, 4 years ago

First release to Xenial

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1/* Definitions for C++ parsing and type checking.
2   Copyright (C) 1987-2013 Free Software Foundation, Inc.
3   Contributed by Michael Tiemann (tiemann@cygnus.com)
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 3, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING3.  If not see
19<http://www.gnu.org/licenses/>.  */
20
21#ifndef GCC_CP_TREE_H
22#define GCC_CP_TREE_H
23
24#include "ggc.h"
25#include "function.h"
26#include "hashtab.h"
27#include "vec.h"
28
29/* In order for the format checking to accept the C++ front end
30   diagnostic framework extensions, you must include this file before
31   diagnostic-core.h, not after.  We override the definition of GCC_DIAG_STYLE
32   in c-common.h.  */
33#undef GCC_DIAG_STYLE
34#define GCC_DIAG_STYLE __gcc_cxxdiag__
35#if defined(GCC_DIAGNOSTIC_CORE_H) || defined (GCC_C_COMMON_H)
36#error \
37In order for the format checking to accept the C++ front end diagnostic \
38framework extensions, you must include this file before diagnostic-core.h and \
39c-common.h, not after.
40#endif
41#include "c-family/c-common.h"
42#include "diagnostic.h"
43
44#include "name-lookup.h"
45
46/* Usage of TREE_LANG_FLAG_?:
47   0: IDENTIFIER_MARKED (IDENTIFIER_NODEs)
48      NEW_EXPR_USE_GLOBAL (in NEW_EXPR).
49      DELETE_EXPR_USE_GLOBAL (in DELETE_EXPR).
50      COMPOUND_EXPR_OVERLOADED (in COMPOUND_EXPR).
51      TREE_INDIRECT_USING (in NAMESPACE_DECL).
52      CLEANUP_P (in TRY_BLOCK)
53      AGGR_INIT_VIA_CTOR_P (in AGGR_INIT_EXPR)
54      PTRMEM_OK_P (in ADDR_EXPR, OFFSET_REF, SCOPE_REF)
55      PAREN_STRING_LITERAL (in STRING_CST)
56      DECL_GNU_TLS_P (in VAR_DECL)
57      KOENIG_LOOKUP_P (in CALL_EXPR)
58      STATEMENT_LIST_NO_SCOPE (in STATEMENT_LIST).
59      EXPR_STMT_STMT_EXPR_RESULT (in EXPR_STMT)
60      STMT_EXPR_NO_SCOPE (in STMT_EXPR)
61      BIND_EXPR_TRY_BLOCK (in BIND_EXPR)
62      TYPENAME_IS_ENUM_P (in TYPENAME_TYPE)
63      OMP_FOR_GIMPLIFYING_P (in OMP_FOR)
64      BASELINK_QUALIFIED_P (in BASELINK)
65      TARGET_EXPR_IMPLICIT_P (in TARGET_EXPR)
66      TEMPLATE_PARM_PARAMETER_PACK (in TEMPLATE_PARM_INDEX)
67      ATTR_IS_DEPENDENT (in the TREE_LIST for an attribute)
68      CONSTRUCTOR_IS_DIRECT_INIT (in CONSTRUCTOR)
69      LAMBDA_EXPR_CAPTURES_THIS_P (in LAMBDA_EXPR)
70      DECLTYPE_FOR_LAMBDA_CAPTURE (in DECLTYPE_TYPE)
71      VEC_INIT_EXPR_IS_CONSTEXPR (in VEC_INIT_EXPR)
72      DECL_OVERRIDE_P (in FUNCTION_DECL)
73      IMPLICIT_CONV_EXPR_DIRECT_INIT (in IMPLICIT_CONV_EXPR)
74      TRANSACTION_EXPR_IS_STMT (in TRANSACTION_EXPR)
75      CONVERT_EXPR_VBASE_PATH (in CONVERT_EXPR)
76      OVL_ARG_DEPENDENT (in OVERLOAD)
77      PACK_EXPANSION_LOCAL_P (in *_PACK_EXPANSION)
78      TINFO_RECHECK_ACCESS_P (in TEMPLATE_INFO)
79      SIZEOF_EXPR_TYPE_P (in SIZEOF_EXPR)
80   1: IDENTIFIER_VIRTUAL_P (in IDENTIFIER_NODE)
81      TI_PENDING_TEMPLATE_FLAG.
82      TEMPLATE_PARMS_FOR_INLINE.
83      DELETE_EXPR_USE_VEC (in DELETE_EXPR).
84      (TREE_CALLS_NEW) (in _EXPR or _REF) (commented-out).
85      ICS_ELLIPSIS_FLAG (in _CONV)
86      DECL_INITIALIZED_P (in VAR_DECL)
87      TYPENAME_IS_CLASS_P (in TYPENAME_TYPE)
88      STMT_IS_FULL_EXPR_P (in _STMT)
89      TARGET_EXPR_LIST_INIT_P (in TARGET_EXPR)
90      LAMBDA_EXPR_MUTABLE_P (in LAMBDA_EXPR)
91      DECL_FINAL_P (in FUNCTION_DECL)
92      QUALIFIED_NAME_IS_TEMPLATE (in SCOPE_REF)
93   2: IDENTIFIER_OPNAME_P (in IDENTIFIER_NODE)
94      ICS_THIS_FLAG (in _CONV)
95      DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (in VAR_DECL)
96      STATEMENT_LIST_TRY_BLOCK (in STATEMENT_LIST)
97      TYPENAME_IS_RESOLVING_P (in TYPE_NAME_TYPE)
98      TARGET_EXPR_DIRECT_INIT_P (in TARGET_EXPR)
99      FNDECL_USED_AUTO (in FUNCTION_DECL)
100   3: (TREE_REFERENCE_EXPR) (in NON_LVALUE_EXPR) (commented-out).
101      ICS_BAD_FLAG (in _CONV)
102      FN_TRY_BLOCK_P (in TRY_BLOCK)
103      IDENTIFIER_CTOR_OR_DTOR_P (in IDENTIFIER_NODE)
104      BIND_EXPR_BODY_BLOCK (in BIND_EXPR)
105      DECL_NON_TRIVIALLY_INITIALIZED_P (in VAR_DECL)
106   4: TREE_HAS_CONSTRUCTOR (in INDIRECT_REF, SAVE_EXPR, CONSTRUCTOR,
107          or FIELD_DECL).
108      IDENTIFIER_TYPENAME_P (in IDENTIFIER_NODE)
109      DECL_TINFO_P (in VAR_DECL)
110      FUNCTION_REF_QUALIFIED (in FUNCTION_TYPE, METHOD_TYPE)
111   5: C_IS_RESERVED_WORD (in IDENTIFIER_NODE)
112      DECL_VTABLE_OR_VTT_P (in VAR_DECL)
113      FUNCTION_RVALUE_QUALIFIED (in FUNCTION_TYPE, METHOD_TYPE)
114   6: IDENTIFIER_REPO_CHOSEN (in IDENTIFIER_NODE)
115      DECL_CONSTRUCTION_VTABLE_P (in VAR_DECL)
116      TYPE_MARKED_P (in _TYPE)
117
118   Usage of TYPE_LANG_FLAG_?:
119   0: TYPE_DEPENDENT_P
120   1: TYPE_HAS_USER_CONSTRUCTOR.
121   2: unused
122   3: TYPE_FOR_JAVA.
123   4: TYPE_HAS_NONTRIVIAL_DESTRUCTOR
124   5: CLASS_TYPE_P (in RECORD_TYPE and UNION_TYPE)
125      ENUM_FIXED_UNDERLYING_TYPE_P (in ENUMERAL_TYPE)
126   6: TYPE_DEPENDENT_P_VALID
127
128   Usage of DECL_LANG_FLAG_?:
129   0: DECL_ERROR_REPORTED (in VAR_DECL).
130      DECL_TEMPLATE_PARM_P (in PARM_DECL, CONST_DECL, TYPE_DECL, or TEMPLATE_DECL)
131      DECL_LOCAL_FUNCTION_P (in FUNCTION_DECL)
132      DECL_MUTABLE_P (in FIELD_DECL)
133      DECL_DEPENDENT_P (in USING_DECL)
134   1: C_TYPEDEF_EXPLICITLY_SIGNED (in TYPE_DECL).
135      DECL_TEMPLATE_INSTANTIATED (in a VAR_DECL or a FUNCTION_DECL)
136      DECL_MEMBER_TEMPLATE_P (in TEMPLATE_DECL)
137      FUNCTION_PARAMETER_PACK_P (in PARM_DECL)
138      USING_DECL_TYPENAME_P (in USING_DECL)
139   2: DECL_THIS_EXTERN (in VAR_DECL or FUNCTION_DECL).
140      DECL_IMPLICIT_TYPEDEF_P (in a TYPE_DECL)
141   3: DECL_IN_AGGR_P.
142   4: DECL_C_BIT_FIELD (in a FIELD_DECL)
143      DECL_ANON_UNION_VAR_P (in a VAR_DECL)
144      DECL_SELF_REFERENCE_P (in a TYPE_DECL)
145      DECL_INVALID_OVERRIDER_P (in a FUNCTION_DECL)
146   5: DECL_INTERFACE_KNOWN.
147   6: DECL_THIS_STATIC (in VAR_DECL or FUNCTION_DECL).
148      DECL_FIELD_IS_BASE (in FIELD_DECL)
149      TYPE_DECL_ALIAS_P (in TYPE_DECL)
150   7: DECL_DEAD_FOR_LOCAL (in VAR_DECL).
151      DECL_THUNK_P (in a member FUNCTION_DECL)
152      DECL_NORMAL_CAPTURE_P (in FIELD_DECL)
153   8: DECL_DECLARED_CONSTEXPR_P (in VAR_DECL, FUNCTION_DECL)
154
155   Usage of language-independent fields in a language-dependent manner:
156
157   TYPE_ALIAS_SET
158     This field is used by TYPENAME_TYPEs, TEMPLATE_TYPE_PARMs, and so
159     forth as a substitute for the mark bits provided in `lang_type'.
160     At present, only the six low-order bits are used.
161
162   TYPE_LANG_SLOT_1
163     For an ENUMERAL_TYPE, this is ENUM_TEMPLATE_INFO.
164     For a FUNCTION_TYPE or METHOD_TYPE, this is TYPE_RAISES_EXCEPTIONS
165
166  BINFO_VIRTUALS
167     For a binfo, this is a TREE_LIST.  There is an entry for each
168     virtual function declared either in BINFO or its direct and
169     indirect primary bases.
170
171     The BV_DELTA of each node gives the amount by which to adjust the
172     `this' pointer when calling the function.  If the method is an
173     overridden version of a base class method, then it is assumed
174     that, prior to adjustment, the this pointer points to an object
175     of the base class.
176
177     The BV_VCALL_INDEX of each node, if non-NULL, gives the vtable
178     index of the vcall offset for this entry.
179
180     The BV_FN is the declaration for the virtual function itself.
181
182     If BV_LOST_PRIMARY is set, it means that this entry is for a lost
183     primary virtual base and can be left null in the vtable.
184
185   BINFO_VTABLE
186     This is an expression with POINTER_TYPE that gives the value
187     to which the vptr should be initialized.  Use get_vtbl_decl_for_binfo
188     to extract the VAR_DECL for the complete vtable.
189
190   DECL_VINDEX
191     This field is NULL for a non-virtual function.  For a virtual
192     function, it is eventually set to an INTEGER_CST indicating the
193     index in the vtable at which this function can be found.  When
194     a virtual function is declared, but before it is known what
195     function is overridden, this field is the error_mark_node.
196
197     Temporarily, it may be set to a TREE_LIST whose TREE_VALUE is
198     the virtual function this one overrides, and whose TREE_CHAIN is
199     the old DECL_VINDEX.  */
200
201/* Language-specific tree checkers.  */
202
203#define VAR_OR_FUNCTION_DECL_CHECK(NODE) \
204  TREE_CHECK2(NODE,VAR_DECL,FUNCTION_DECL)
205
206#define TYPE_FUNCTION_OR_TEMPLATE_DECL_CHECK(NODE) \
207  TREE_CHECK3(NODE,TYPE_DECL,TEMPLATE_DECL,FUNCTION_DECL)
208
209#define TYPE_FUNCTION_OR_TEMPLATE_DECL_P(NODE) \
210  (TREE_CODE (NODE) == TYPE_DECL || TREE_CODE (NODE) == TEMPLATE_DECL \
211   || TREE_CODE (NODE) == FUNCTION_DECL)
212
213#define VAR_FUNCTION_OR_PARM_DECL_CHECK(NODE) \
214  TREE_CHECK3(NODE,VAR_DECL,FUNCTION_DECL,PARM_DECL)
215
216#define VAR_TEMPL_TYPE_OR_FUNCTION_DECL_CHECK(NODE) \
217  TREE_CHECK4(NODE,VAR_DECL,FUNCTION_DECL,TYPE_DECL,TEMPLATE_DECL)
218
219#define VAR_TEMPL_TYPE_FIELD_OR_FUNCTION_DECL_CHECK(NODE) \
220  TREE_CHECK5(NODE,VAR_DECL,FIELD_DECL,FUNCTION_DECL,TYPE_DECL,TEMPLATE_DECL)
221
222#define BOUND_TEMPLATE_TEMPLATE_PARM_TYPE_CHECK(NODE) \
223  TREE_CHECK(NODE,BOUND_TEMPLATE_TEMPLATE_PARM)
224
225#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
226#define THUNK_FUNCTION_CHECK(NODE) __extension__                        \
227({  __typeof (NODE) const __t = (NODE);                                 \
228    if (TREE_CODE (__t) != FUNCTION_DECL || !__t->decl_common.lang_specific \
229        || !__t->decl_common.lang_specific->u.fn.thunk_p)               \
230      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__, 0);     \
231     __t; })
232#else
233#define THUNK_FUNCTION_CHECK(NODE) (NODE)
234#endif
235
236/* Language-dependent contents of an identifier.  */
237
238struct GTY(()) lang_identifier {
239  struct c_common_identifier c_common;
240  cxx_binding *namespace_bindings;
241  cxx_binding *bindings;
242  tree class_template_info;
243  tree label_value;
244};
245
246/* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
247   keyword.  C_RID_CODE (node) is then the RID_* value of the keyword,
248   and C_RID_YYCODE is the token number wanted by Yacc.  */
249
250#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_5 (ID)
251
252#define LANG_IDENTIFIER_CAST(NODE) \
253        ((struct lang_identifier*)IDENTIFIER_NODE_CHECK (NODE))
254
255struct GTY(()) template_parm_index_s {
256  struct tree_common common;
257  int index;
258  int level;
259  int orig_level;
260  tree decl;
261};
262typedef struct template_parm_index_s template_parm_index;
263
264struct GTY(()) ptrmem_cst {
265  struct tree_common common;
266  tree member;
267};
268typedef struct ptrmem_cst * ptrmem_cst_t;
269
270#define IDENTIFIER_GLOBAL_VALUE(NODE) \
271  namespace_binding ((NODE), global_namespace)
272#define SET_IDENTIFIER_GLOBAL_VALUE(NODE, VAL) \
273  set_namespace_binding ((NODE), global_namespace, (VAL))
274#define IDENTIFIER_NAMESPACE_VALUE(NODE) \
275  namespace_binding ((NODE), current_namespace)
276#define SET_IDENTIFIER_NAMESPACE_VALUE(NODE, VAL) \
277  set_namespace_binding ((NODE), current_namespace, (VAL))
278
279#define CLEANUP_P(NODE)         TREE_LANG_FLAG_0 (TRY_BLOCK_CHECK (NODE))
280
281#define BIND_EXPR_TRY_BLOCK(NODE) \
282  TREE_LANG_FLAG_0 (BIND_EXPR_CHECK (NODE))
283
284/* Used to mark the block around the member initializers and cleanups.  */
285#define BIND_EXPR_BODY_BLOCK(NODE) \
286  TREE_LANG_FLAG_3 (BIND_EXPR_CHECK (NODE))
287#define FUNCTION_NEEDS_BODY_BLOCK(NODE) \
288  (DECL_CONSTRUCTOR_P (NODE) || DECL_DESTRUCTOR_P (NODE) \
289   || LAMBDA_FUNCTION_P (NODE))
290
291#define STATEMENT_LIST_NO_SCOPE(NODE) \
292  TREE_LANG_FLAG_0 (STATEMENT_LIST_CHECK (NODE))
293#define STATEMENT_LIST_TRY_BLOCK(NODE) \
294  TREE_LANG_FLAG_2 (STATEMENT_LIST_CHECK (NODE))
295
296/* Nonzero if this statement should be considered a full-expression,
297   i.e., if temporaries created during this statement should have
298   their destructors run at the end of this statement.  */
299#define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
300
301/* Marks the result of a statement expression.  */
302#define EXPR_STMT_STMT_EXPR_RESULT(NODE) \
303  TREE_LANG_FLAG_0 (EXPR_STMT_CHECK (NODE))
304
305/* Nonzero if this statement-expression does not have an associated scope.  */
306#define STMT_EXPR_NO_SCOPE(NODE) \
307   TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
308
309/* Returns nonzero iff TYPE1 and TYPE2 are the same type, in the usual
310   sense of `same'.  */
311#define same_type_p(TYPE1, TYPE2) \
312  comptypes ((TYPE1), (TYPE2), COMPARE_STRICT)
313
314/* Returns nonzero iff NODE is a declaration for the global function
315   `main'.  */
316#define DECL_MAIN_P(NODE)                               \
317   (DECL_EXTERN_C_FUNCTION_P (NODE)                     \
318    && DECL_NAME (NODE) != NULL_TREE                    \
319    && MAIN_NAME_P (DECL_NAME (NODE))                   \
320    && flag_hosted)
321
322/* The overloaded FUNCTION_DECL.  */
323#define OVL_FUNCTION(NODE) \
324  (((struct tree_overload*)OVERLOAD_CHECK (NODE))->function)
325#define OVL_CHAIN(NODE)      TREE_CHAIN (NODE)
326/* Polymorphic access to FUNCTION and CHAIN.  */
327#define OVL_CURRENT(NODE)       \
328  ((TREE_CODE (NODE) == OVERLOAD) ? OVL_FUNCTION (NODE) : (NODE))
329#define OVL_NEXT(NODE)          \
330  ((TREE_CODE (NODE) == OVERLOAD) ? TREE_CHAIN (NODE) : NULL_TREE)
331/* If set, this was imported in a using declaration.
332   This is not to confuse with being used somewhere, which
333   is not important for this node.  */
334#define OVL_USED(NODE)          TREE_USED (NODE)
335/* If set, this OVERLOAD was created for argument-dependent lookup
336   and can be freed afterward.  */
337#define OVL_ARG_DEPENDENT(NODE) TREE_LANG_FLAG_0 (OVERLOAD_CHECK (NODE))
338
339struct GTY(()) tree_overload {
340  struct tree_common common;
341  tree function;
342};
343
344/* Returns true iff NODE is a BASELINK.  */
345#define BASELINK_P(NODE) \
346  (TREE_CODE (NODE) == BASELINK)
347/* The BINFO indicating the base from which the BASELINK_FUNCTIONS came.  */
348#define BASELINK_BINFO(NODE) \
349  (((struct tree_baselink*) BASELINK_CHECK (NODE))->binfo)
350/* The functions referred to by the BASELINK; either a FUNCTION_DECL,
351   a TEMPLATE_DECL, an OVERLOAD, or a TEMPLATE_ID_EXPR.  */
352#define BASELINK_FUNCTIONS(NODE) \
353  (((struct tree_baselink*) BASELINK_CHECK (NODE))->functions)
354/* The BINFO in which the search for the functions indicated by this baselink
355   began.  This base is used to determine the accessibility of functions
356   selected by overload resolution.  */
357#define BASELINK_ACCESS_BINFO(NODE) \
358  (((struct tree_baselink*) BASELINK_CHECK (NODE))->access_binfo)
359/* For a type-conversion operator, the BASELINK_OPTYPE indicates the type
360   to which the conversion should occur.  This value is important if
361   the BASELINK_FUNCTIONS include a template conversion operator --
362   the BASELINK_OPTYPE can be used to determine what type the user
363   requested.  */
364#define BASELINK_OPTYPE(NODE) \
365  (TREE_CHAIN (BASELINK_CHECK (NODE)))
366/* Nonzero if this baselink was from a qualified lookup.  */
367#define BASELINK_QUALIFIED_P(NODE) \
368  TREE_LANG_FLAG_0 (BASELINK_CHECK (NODE))
369
370struct GTY(()) tree_baselink {
371  struct tree_common common;
372  tree binfo;
373  tree functions;
374  tree access_binfo;
375};
376
377/* The different kinds of ids that we encounter.  */
378
379typedef enum cp_id_kind
380{
381  /* Not an id at all.  */
382  CP_ID_KIND_NONE,
383  /* An unqualified-id that is not a template-id.  */
384  CP_ID_KIND_UNQUALIFIED,
385  /* An unqualified-id that is a dependent name.  */
386  CP_ID_KIND_UNQUALIFIED_DEPENDENT,
387  /* An unqualified template-id.  */
388  CP_ID_KIND_TEMPLATE_ID,
389  /* A qualified-id.  */
390  CP_ID_KIND_QUALIFIED
391} cp_id_kind;
392
393
394/* The various kinds of C++0x warnings we encounter. */
395
396typedef enum cpp0x_warn_str
397{
398  /* extended initializer lists */
399  CPP0X_INITIALIZER_LISTS,
400  /* explicit conversion operators */
401  CPP0X_EXPLICIT_CONVERSION,
402  /* variadic templates */
403  CPP0X_VARIADIC_TEMPLATES,
404  /* lambda expressions */
405  CPP0X_LAMBDA_EXPR,
406  /* C++0x auto */
407  CPP0X_AUTO,
408  /* scoped enums */
409  CPP0X_SCOPED_ENUMS,
410  /* defaulted and deleted functions */
411  CPP0X_DEFAULTED_DELETED,
412  /* inline namespaces */
413  CPP0X_INLINE_NAMESPACES,
414  /* override controls, override/final */
415  CPP0X_OVERRIDE_CONTROLS,
416  /* non-static data member initializers */
417  CPP0X_NSDMI,
418  /* user defined literals */
419  CPP0X_USER_DEFINED_LITERALS,
420  /* delegating constructors */
421  CPP0X_DELEGATING_CTORS,
422  /* inheriting constructors */
423  CPP0X_INHERITING_CTORS,
424  /* C++11 attributes */
425  CPP0X_ATTRIBUTES,
426  /* ref-qualified member functions */
427  CPP0X_REF_QUALIFIER
428} cpp0x_warn_str;
429
430/* The various kinds of operation used by composite_pointer_type. */
431
432typedef enum composite_pointer_operation
433{
434  /* comparison */
435  CPO_COMPARISON,
436  /* conversion */
437  CPO_CONVERSION,
438  /* conditional expression */
439  CPO_CONDITIONAL_EXPR
440} composite_pointer_operation;
441
442/* Possible cases of expression list used by build_x_compound_expr_from_list. */
443typedef enum expr_list_kind {
444  ELK_INIT,             /* initializer */
445  ELK_MEM_INIT,         /* member initializer */
446  ELK_FUNC_CAST         /* functional cast */
447} expr_list_kind; 
448
449/* Possible cases of implicit bad rhs conversions. */
450typedef enum impl_conv_rhs {
451  ICR_DEFAULT_ARGUMENT, /* default argument */
452  ICR_CONVERTING,       /* converting */
453  ICR_INIT,             /* initialization */
454  ICR_ARGPASS,          /* argument passing */
455  ICR_RETURN,           /* return */
456  ICR_ASSIGN            /* assignment */
457} impl_conv_rhs;
458
459/* Possible cases of implicit or explicit bad conversions to void. */
460typedef enum impl_conv_void {
461  ICV_CAST,            /* (explicit) conversion to void */
462  ICV_SECOND_OF_COND,  /* second operand of conditional expression */
463  ICV_THIRD_OF_COND,   /* third operand of conditional expression */
464  ICV_RIGHT_OF_COMMA,  /* right operand of comma operator */
465  ICV_LEFT_OF_COMMA,   /* left operand of comma operator */
466  ICV_STATEMENT,       /* statement */
467  ICV_THIRD_IN_FOR     /* for increment expression */
468} impl_conv_void;
469
470/* Macros for access to language-specific slots in an identifier.  */
471
472#define IDENTIFIER_NAMESPACE_BINDINGS(NODE)     \
473  (LANG_IDENTIFIER_CAST (NODE)->namespace_bindings)
474#define IDENTIFIER_TEMPLATE(NODE)       \
475  (LANG_IDENTIFIER_CAST (NODE)->class_template_info)
476
477/* The IDENTIFIER_BINDING is the innermost cxx_binding for the
478    identifier.  It's PREVIOUS is the next outermost binding.  Each
479    VALUE field is a DECL for the associated declaration.  Thus,
480    name lookup consists simply of pulling off the node at the front
481    of the list (modulo oddities for looking up the names of types,
482    and such.)  You can use SCOPE field to determine the scope
483    that bound the name.  */
484#define IDENTIFIER_BINDING(NODE) \
485  (LANG_IDENTIFIER_CAST (NODE)->bindings)
486
487/* TREE_TYPE only indicates on local and class scope the current
488   type. For namespace scope, the presence of a type in any namespace
489   is indicated with global_type_node, and the real type behind must
490   be found through lookup.  */
491#define IDENTIFIER_TYPE_VALUE(NODE) identifier_type_value (NODE)
492#define REAL_IDENTIFIER_TYPE_VALUE(NODE) TREE_TYPE (NODE)
493#define SET_IDENTIFIER_TYPE_VALUE(NODE,TYPE) (TREE_TYPE (NODE) = (TYPE))
494#define IDENTIFIER_HAS_TYPE_VALUE(NODE) (IDENTIFIER_TYPE_VALUE (NODE) ? 1 : 0)
495
496#define IDENTIFIER_LABEL_VALUE(NODE) \
497  (LANG_IDENTIFIER_CAST (NODE)->label_value)
498#define SET_IDENTIFIER_LABEL_VALUE(NODE, VALUE)   \
499  IDENTIFIER_LABEL_VALUE (NODE) = (VALUE)
500
501/* Nonzero if this identifier is used as a virtual function name somewhere
502   (optimizes searches).  */
503#define IDENTIFIER_VIRTUAL_P(NODE) TREE_LANG_FLAG_1 (NODE)
504
505/* Nonzero if this identifier is the prefix for a mangled C++ operator
506   name.  */
507#define IDENTIFIER_OPNAME_P(NODE) TREE_LANG_FLAG_2 (NODE)
508
509/* Nonzero if this identifier is the name of a type-conversion
510   operator.  */
511#define IDENTIFIER_TYPENAME_P(NODE) \
512  TREE_LANG_FLAG_4 (NODE)
513
514/* Nonzero if this identifier is the name of a constructor or
515   destructor.  */
516#define IDENTIFIER_CTOR_OR_DTOR_P(NODE) \
517  TREE_LANG_FLAG_3 (NODE)
518
519/* True iff NAME is the DECL_ASSEMBLER_NAME for an entity with vague
520   linkage which the prelinker has assigned to this translation
521   unit.  */
522#define IDENTIFIER_REPO_CHOSEN(NAME) \
523  (TREE_LANG_FLAG_6 (NAME))
524
525/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only.  */
526#define C_TYPE_FIELDS_READONLY(TYPE) \
527  (LANG_TYPE_CLASS_CHECK (TYPE)->fields_readonly)
528
529/* The tokens stored in the default argument.  */
530
531#define DEFARG_TOKENS(NODE) \
532  (((struct tree_default_arg *)DEFAULT_ARG_CHECK (NODE))->tokens)
533#define DEFARG_INSTANTIATIONS(NODE) \
534  (((struct tree_default_arg *)DEFAULT_ARG_CHECK (NODE))->instantiations)
535
536struct GTY (()) tree_default_arg {
537  struct tree_common common;
538  struct cp_token_cache *tokens;
539  vec<tree, va_gc> *instantiations;
540};
541
542
543#define DEFERRED_NOEXCEPT_PATTERN(NODE) \
544  (((struct tree_deferred_noexcept *)DEFERRED_NOEXCEPT_CHECK (NODE))->pattern)
545#define DEFERRED_NOEXCEPT_ARGS(NODE) \
546  (((struct tree_deferred_noexcept *)DEFERRED_NOEXCEPT_CHECK (NODE))->args)
547#define DEFERRED_NOEXCEPT_SPEC_P(NODE)                          \
548  ((NODE) && (TREE_PURPOSE (NODE))                              \
549  && (TREE_CODE (TREE_PURPOSE (NODE)) == DEFERRED_NOEXCEPT      \
550      || is_overloaded_fn (TREE_PURPOSE (NODE))))
551
552struct GTY (()) tree_deferred_noexcept {
553  struct tree_base base;
554  tree pattern;
555  tree args;
556};
557
558
559/* The condition associated with the static assertion.  This must be
560   an integral constant expression.  */
561#define STATIC_ASSERT_CONDITION(NODE) \
562  (((struct tree_static_assert *)STATIC_ASSERT_CHECK (NODE))->condition)
563
564/* The message associated with the static assertion.  This must be a
565   string constant, which will be emitted as an error message when the
566   static assert condition is false.  */
567#define STATIC_ASSERT_MESSAGE(NODE) \
568  (((struct tree_static_assert *)STATIC_ASSERT_CHECK (NODE))->message)
569
570/* Source location information for a static assertion.  */
571#define STATIC_ASSERT_SOURCE_LOCATION(NODE) \
572  (((struct tree_static_assert *)STATIC_ASSERT_CHECK (NODE))->location)
573
574struct GTY (()) tree_static_assert {
575  struct tree_common common;
576  tree condition;
577  tree message;
578  location_t location;
579};
580
581struct GTY (()) tree_argument_pack_select {
582  struct tree_common common;
583  tree argument_pack;
584  int index;
585};
586
587/* The different kinds of traits that we encounter.  */
588
589typedef enum cp_trait_kind
590{
591  CPTK_BASES,
592  CPTK_DIRECT_BASES,
593  CPTK_HAS_NOTHROW_ASSIGN,
594  CPTK_HAS_NOTHROW_CONSTRUCTOR,
595  CPTK_HAS_NOTHROW_COPY,
596  CPTK_HAS_TRIVIAL_ASSIGN,
597  CPTK_HAS_TRIVIAL_CONSTRUCTOR,
598  CPTK_HAS_TRIVIAL_COPY,
599  CPTK_HAS_TRIVIAL_DESTRUCTOR,
600  CPTK_HAS_VIRTUAL_DESTRUCTOR,
601  CPTK_IS_ABSTRACT,
602  CPTK_IS_BASE_OF,
603  CPTK_IS_CLASS,
604  CPTK_IS_CONVERTIBLE_TO,
605  CPTK_IS_EMPTY,
606  CPTK_IS_ENUM,
607  CPTK_IS_FINAL,
608  CPTK_IS_LITERAL_TYPE,
609  CPTK_IS_POD,
610  CPTK_IS_POLYMORPHIC,
611  CPTK_IS_STD_LAYOUT,
612  CPTK_IS_TRIVIAL,
613  CPTK_IS_UNION,
614  CPTK_UNDERLYING_TYPE
615} cp_trait_kind;
616
617/* The types that we are processing.  */
618#define TRAIT_EXPR_TYPE1(NODE) \
619  (((struct tree_trait_expr *)TRAIT_EXPR_CHECK (NODE))->type1)
620
621#define TRAIT_EXPR_TYPE2(NODE) \
622  (((struct tree_trait_expr *)TRAIT_EXPR_CHECK (NODE))->type2)
623
624/* The specific trait that we are processing.  */
625#define TRAIT_EXPR_KIND(NODE) \
626  (((struct tree_trait_expr *)TRAIT_EXPR_CHECK (NODE))->kind)
627
628struct GTY (()) tree_trait_expr {
629  struct tree_common common;
630  tree type1;
631  tree type2; 
632  enum cp_trait_kind kind;
633};
634
635/* Based off of TYPE_ANONYMOUS_P.  */
636#define LAMBDA_TYPE_P(NODE) \
637  (CLASS_TYPE_P (NODE) && CLASSTYPE_LAMBDA_EXPR (NODE))
638
639/* Test if FUNCTION_DECL is a lambda function.  */
640#define LAMBDA_FUNCTION_P(FNDECL) \
641  (DECL_OVERLOADED_OPERATOR_P (FNDECL) == CALL_EXPR \
642   && LAMBDA_TYPE_P (CP_DECL_CONTEXT (FNDECL)))
643
644enum cp_lambda_default_capture_mode_type {
645  CPLD_NONE,
646  CPLD_COPY,
647  CPLD_REFERENCE
648};
649
650/* The method of default capture, if any.  */
651#define LAMBDA_EXPR_DEFAULT_CAPTURE_MODE(NODE) \
652  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->default_capture_mode)
653
654/* The capture-list, including `this'.  Each capture is stored as a FIELD_DECL
655 * so that the name, type, and field are all together, whether or not it has
656 * been added to the lambda's class type.
657   TREE_LIST:
658     TREE_PURPOSE: The FIELD_DECL for this capture.
659     TREE_VALUE: The initializer. This is part of a GNU extension.  */
660#define LAMBDA_EXPR_CAPTURE_LIST(NODE) \
661  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->capture_list)
662
663/* During parsing of the lambda-introducer, the node in the capture-list
664   that holds the 'this' capture.  During parsing of the body, the
665   capture proxy for that node.  */
666#define LAMBDA_EXPR_THIS_CAPTURE(NODE) \
667  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->this_capture)
668
669/* Predicate tracking whether `this' is in the effective capture set.  */
670#define LAMBDA_EXPR_CAPTURES_THIS_P(NODE) \
671  LAMBDA_EXPR_THIS_CAPTURE(NODE)
672
673/* Predicate tracking whether the lambda was declared 'mutable'.  */
674#define LAMBDA_EXPR_MUTABLE_P(NODE) \
675  TREE_LANG_FLAG_1 (LAMBDA_EXPR_CHECK (NODE))
676
677/* The return type in the expression.
678 * NULL_TREE indicates that none was specified.  */
679#define LAMBDA_EXPR_RETURN_TYPE(NODE) \
680  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->return_type)
681
682/* The source location of the lambda.  */
683#define LAMBDA_EXPR_LOCATION(NODE) \
684  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->locus)
685
686/* The mangling scope for the lambda: FUNCTION_DECL, PARM_DECL, VAR_DECL,
687   FIELD_DECL or NULL_TREE.  If this is NULL_TREE, we have no linkage.  */
688#define LAMBDA_EXPR_EXTRA_SCOPE(NODE) \
689  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->extra_scope)
690
691/* If EXTRA_SCOPE, this is the number of the lambda within that scope.  */
692#define LAMBDA_EXPR_DISCRIMINATOR(NODE) \
693  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->discriminator)
694
695/* During parsing of the lambda, a vector of capture proxies which need
696   to be pushed once we're done processing a nested lambda.  */
697#define LAMBDA_EXPR_PENDING_PROXIES(NODE) \
698  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->pending_proxies)
699
700/* The closure type of the lambda.  Note that the TREE_TYPE of a
701   LAMBDA_EXPR is always NULL_TREE, because we need to instantiate the
702   LAMBDA_EXPR in order to instantiate the type.  */
703#define LAMBDA_EXPR_CLOSURE(NODE) \
704  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->closure)
705
706struct GTY (()) tree_lambda_expr
707{
708  struct tree_typed typed;
709  tree capture_list;
710  tree this_capture;
711  tree return_type;
712  tree extra_scope;
713  tree closure;
714  vec<tree, va_gc> *pending_proxies;
715  location_t locus;
716  enum cp_lambda_default_capture_mode_type default_capture_mode;
717  int discriminator;
718};
719
720/* A (typedef,context,usage location) triplet.
721   It represents a typedef used through a
722   context at a given source location.
723   e.g.
724   struct foo {
725     typedef int myint;
726   };
727
728   struct bar {
729    foo::myint v; // #1<-- this location.
730   };
731
732   In bar, the triplet will be (myint, foo, #1).
733   */
734struct GTY(()) qualified_typedef_usage_s {
735  tree typedef_decl;
736  tree context;
737  location_t locus;
738};
739typedef struct qualified_typedef_usage_s qualified_typedef_usage_t;
740
741/* Non-zero if this template specialization has access violations that
742   should be rechecked when the function is instantiated outside argument
743   deduction.  */
744#define TINFO_HAS_ACCESS_ERRORS(NODE) \
745  (TREE_LANG_FLAG_0 (TEMPLATE_INFO_CHECK (NODE)))
746#define FNDECL_HAS_ACCESS_ERRORS(NODE) \
747  (TINFO_HAS_ACCESS_ERRORS (DECL_TEMPLATE_INFO (NODE)))
748
749struct GTY(()) tree_template_info {
750  struct tree_common common;
751  vec<qualified_typedef_usage_t, va_gc> *typedefs_needing_access_checking;
752};
753
754enum cp_tree_node_structure_enum {
755  TS_CP_GENERIC,
756  TS_CP_IDENTIFIER,
757  TS_CP_TPI,
758  TS_CP_PTRMEM,
759  TS_CP_BINDING,
760  TS_CP_OVERLOAD,
761  TS_CP_BASELINK,
762  TS_CP_WRAPPER,
763  TS_CP_DEFAULT_ARG,
764  TS_CP_DEFERRED_NOEXCEPT,
765  TS_CP_STATIC_ASSERT,
766  TS_CP_ARGUMENT_PACK_SELECT,
767  TS_CP_TRAIT_EXPR,
768  TS_CP_LAMBDA_EXPR,
769  TS_CP_TEMPLATE_INFO,
770  TS_CP_USERDEF_LITERAL,
771  LAST_TS_CP_ENUM
772};
773
774/* The resulting tree type.  */
775union GTY((desc ("cp_tree_node_structure (&%h)"),
776       chain_next ("(union lang_tree_node *) c_tree_chain_next (&%h.generic)"))) lang_tree_node {
777  union tree_node GTY ((tag ("TS_CP_GENERIC"),
778                        desc ("tree_node_structure (&%h)"))) generic;
779  struct template_parm_index_s GTY ((tag ("TS_CP_TPI"))) tpi;
780  struct ptrmem_cst GTY ((tag ("TS_CP_PTRMEM"))) ptrmem;
781  struct tree_overload GTY ((tag ("TS_CP_OVERLOAD"))) overload;
782  struct tree_baselink GTY ((tag ("TS_CP_BASELINK"))) baselink;
783  struct tree_default_arg GTY ((tag ("TS_CP_DEFAULT_ARG"))) default_arg;
784  struct tree_deferred_noexcept GTY ((tag ("TS_CP_DEFERRED_NOEXCEPT"))) deferred_noexcept;
785  struct lang_identifier GTY ((tag ("TS_CP_IDENTIFIER"))) identifier;
786  struct tree_static_assert GTY ((tag ("TS_CP_STATIC_ASSERT"))) 
787    static_assertion;
788  struct tree_argument_pack_select GTY ((tag ("TS_CP_ARGUMENT_PACK_SELECT")))
789    argument_pack_select;
790  struct tree_trait_expr GTY ((tag ("TS_CP_TRAIT_EXPR")))
791    trait_expression;
792  struct tree_lambda_expr GTY ((tag ("TS_CP_LAMBDA_EXPR")))
793    lambda_expression;
794  struct tree_template_info GTY ((tag ("TS_CP_TEMPLATE_INFO")))
795    template_info;
796  struct tree_userdef_literal GTY ((tag ("TS_CP_USERDEF_LITERAL")))
797    userdef_literal;
798};
799
800
801enum cp_tree_index
802{
803    CPTI_JAVA_BYTE_TYPE,
804    CPTI_JAVA_SHORT_TYPE,
805    CPTI_JAVA_INT_TYPE,
806    CPTI_JAVA_LONG_TYPE,
807    CPTI_JAVA_FLOAT_TYPE,
808    CPTI_JAVA_DOUBLE_TYPE,
809    CPTI_JAVA_CHAR_TYPE,
810    CPTI_JAVA_BOOLEAN_TYPE,
811
812    CPTI_WCHAR_DECL,
813    CPTI_VTABLE_ENTRY_TYPE,
814    CPTI_DELTA_TYPE,
815    CPTI_VTABLE_INDEX_TYPE,
816    CPTI_CLEANUP_TYPE,
817    CPTI_VTT_PARM_TYPE,
818
819    CPTI_CLASS_TYPE,
820    CPTI_UNKNOWN_TYPE,
821    CPTI_INIT_LIST_TYPE,
822    CPTI_VTBL_TYPE,
823    CPTI_VTBL_PTR_TYPE,
824    CPTI_STD,
825    CPTI_ABI,
826    CPTI_CONST_TYPE_INFO_TYPE,
827    CPTI_TYPE_INFO_PTR_TYPE,
828    CPTI_ABORT_FNDECL,
829    CPTI_GLOBAL_DELETE_FNDECL,
830    CPTI_AGGR_TAG,
831
832    CPTI_CTOR_IDENTIFIER,
833    CPTI_COMPLETE_CTOR_IDENTIFIER,
834    CPTI_BASE_CTOR_IDENTIFIER,
835    CPTI_DTOR_IDENTIFIER,
836    CPTI_COMPLETE_DTOR_IDENTIFIER,
837    CPTI_BASE_DTOR_IDENTIFIER,
838    CPTI_DELETING_DTOR_IDENTIFIER,
839    CPTI_DELTA_IDENTIFIER,
840    CPTI_IN_CHARGE_IDENTIFIER,
841    CPTI_VTT_PARM_IDENTIFIER,
842    CPTI_NELTS_IDENTIFIER,
843    CPTI_THIS_IDENTIFIER,
844    CPTI_PFN_IDENTIFIER,
845    CPTI_VPTR_IDENTIFIER,
846    CPTI_STD_IDENTIFIER,
847
848    CPTI_LANG_NAME_C,
849    CPTI_LANG_NAME_CPLUSPLUS,
850    CPTI_LANG_NAME_JAVA,
851
852    CPTI_EMPTY_EXCEPT_SPEC,
853    CPTI_NOEXCEPT_TRUE_SPEC,
854    CPTI_NOEXCEPT_FALSE_SPEC,
855    CPTI_JCLASS,
856    CPTI_TERMINATE,
857    CPTI_CALL_UNEXPECTED,
858    CPTI_ATEXIT_FN_PTR_TYPE,
859    CPTI_ATEXIT,
860    CPTI_DSO_HANDLE,
861    CPTI_DCAST,
862
863    CPTI_KEYED_CLASSES,
864
865    CPTI_NULLPTR,
866    CPTI_NULLPTR_TYPE,
867
868    CPTI_MAX
869};
870
871extern GTY(()) tree cp_global_trees[CPTI_MAX];
872
873#define java_byte_type_node             cp_global_trees[CPTI_JAVA_BYTE_TYPE]
874#define java_short_type_node            cp_global_trees[CPTI_JAVA_SHORT_TYPE]
875#define java_int_type_node              cp_global_trees[CPTI_JAVA_INT_TYPE]
876#define java_long_type_node             cp_global_trees[CPTI_JAVA_LONG_TYPE]
877#define java_float_type_node            cp_global_trees[CPTI_JAVA_FLOAT_TYPE]
878#define java_double_type_node           cp_global_trees[CPTI_JAVA_DOUBLE_TYPE]
879#define java_char_type_node             cp_global_trees[CPTI_JAVA_CHAR_TYPE]
880#define java_boolean_type_node          cp_global_trees[CPTI_JAVA_BOOLEAN_TYPE]
881
882#define wchar_decl_node                 cp_global_trees[CPTI_WCHAR_DECL]
883#define vtable_entry_type               cp_global_trees[CPTI_VTABLE_ENTRY_TYPE]
884/* The type used to represent an offset by which to adjust the `this'
885   pointer in pointer-to-member types.  */
886#define delta_type_node                 cp_global_trees[CPTI_DELTA_TYPE]
887/* The type used to represent an index into the vtable.  */
888#define vtable_index_type               cp_global_trees[CPTI_VTABLE_INDEX_TYPE]
889
890#define class_type_node                 cp_global_trees[CPTI_CLASS_TYPE]
891#define unknown_type_node               cp_global_trees[CPTI_UNKNOWN_TYPE]
892#define init_list_type_node             cp_global_trees[CPTI_INIT_LIST_TYPE]
893#define vtbl_type_node                  cp_global_trees[CPTI_VTBL_TYPE]
894#define vtbl_ptr_type_node              cp_global_trees[CPTI_VTBL_PTR_TYPE]
895#define std_node                        cp_global_trees[CPTI_STD]
896#define abi_node                        cp_global_trees[CPTI_ABI]
897#define const_type_info_type_node       cp_global_trees[CPTI_CONST_TYPE_INFO_TYPE]
898#define type_info_ptr_type              cp_global_trees[CPTI_TYPE_INFO_PTR_TYPE]
899#define abort_fndecl                    cp_global_trees[CPTI_ABORT_FNDECL]
900#define global_delete_fndecl            cp_global_trees[CPTI_GLOBAL_DELETE_FNDECL]
901#define current_aggr                    cp_global_trees[CPTI_AGGR_TAG]
902#define nullptr_node                    cp_global_trees[CPTI_NULLPTR]
903#define nullptr_type_node               cp_global_trees[CPTI_NULLPTR_TYPE]
904
905/* We cache these tree nodes so as to call get_identifier less
906   frequently.  */
907
908/* The name of a constructor that takes an in-charge parameter to
909   decide whether or not to construct virtual base classes.  */
910#define ctor_identifier                 cp_global_trees[CPTI_CTOR_IDENTIFIER]
911/* The name of a constructor that constructs virtual base classes.  */
912#define complete_ctor_identifier        cp_global_trees[CPTI_COMPLETE_CTOR_IDENTIFIER]
913/* The name of a constructor that does not construct virtual base classes.  */
914#define base_ctor_identifier            cp_global_trees[CPTI_BASE_CTOR_IDENTIFIER]
915/* The name of a destructor that takes an in-charge parameter to
916   decide whether or not to destroy virtual base classes and whether
917   or not to delete the object.  */
918#define dtor_identifier                 cp_global_trees[CPTI_DTOR_IDENTIFIER]
919/* The name of a destructor that destroys virtual base classes.  */
920#define complete_dtor_identifier        cp_global_trees[CPTI_COMPLETE_DTOR_IDENTIFIER]
921/* The name of a destructor that does not destroy virtual base
922   classes.  */
923#define base_dtor_identifier            cp_global_trees[CPTI_BASE_DTOR_IDENTIFIER]
924/* The name of a destructor that destroys virtual base classes, and
925   then deletes the entire object.  */
926#define deleting_dtor_identifier        cp_global_trees[CPTI_DELETING_DTOR_IDENTIFIER]
927#define delta_identifier                cp_global_trees[CPTI_DELTA_IDENTIFIER]
928#define in_charge_identifier            cp_global_trees[CPTI_IN_CHARGE_IDENTIFIER]
929/* The name of the parameter that contains a pointer to the VTT to use
930   for this subobject constructor or destructor.  */
931#define vtt_parm_identifier             cp_global_trees[CPTI_VTT_PARM_IDENTIFIER]
932#define nelts_identifier                cp_global_trees[CPTI_NELTS_IDENTIFIER]
933#define this_identifier                 cp_global_trees[CPTI_THIS_IDENTIFIER]
934#define pfn_identifier                  cp_global_trees[CPTI_PFN_IDENTIFIER]
935#define vptr_identifier                 cp_global_trees[CPTI_VPTR_IDENTIFIER]
936/* The name of the std namespace.  */
937#define std_identifier                  cp_global_trees[CPTI_STD_IDENTIFIER]
938#define lang_name_c                     cp_global_trees[CPTI_LANG_NAME_C]
939#define lang_name_cplusplus             cp_global_trees[CPTI_LANG_NAME_CPLUSPLUS]
940#define lang_name_java                  cp_global_trees[CPTI_LANG_NAME_JAVA]
941
942/* Exception specifier used for throw().  */
943#define empty_except_spec               cp_global_trees[CPTI_EMPTY_EXCEPT_SPEC]
944#define noexcept_true_spec              cp_global_trees[CPTI_NOEXCEPT_TRUE_SPEC]
945#define noexcept_false_spec             cp_global_trees[CPTI_NOEXCEPT_FALSE_SPEC]
946
947/* If non-NULL, a POINTER_TYPE equivalent to (java::lang::Class*).  */
948#define jclass_node                     cp_global_trees[CPTI_JCLASS]
949
950/* The declaration for `std::terminate'.  */
951#define terminate_node                  cp_global_trees[CPTI_TERMINATE]
952
953/* The declaration for "__cxa_call_unexpected".  */
954#define call_unexpected_node            cp_global_trees[CPTI_CALL_UNEXPECTED]
955
956/* The type of the function-pointer argument to "__cxa_atexit" (or
957   "std::atexit", if "__cxa_atexit" is not being used).  */
958#define atexit_fn_ptr_type_node         cp_global_trees[CPTI_ATEXIT_FN_PTR_TYPE]
959
960/* A pointer to `std::atexit'.  */
961#define atexit_node                     cp_global_trees[CPTI_ATEXIT]
962
963/* A pointer to `__dso_handle'.  */
964#define dso_handle_node                 cp_global_trees[CPTI_DSO_HANDLE]
965
966/* The declaration of the dynamic_cast runtime.  */
967#define dynamic_cast_node               cp_global_trees[CPTI_DCAST]
968
969/* The type of a destructor.  */
970#define cleanup_type                    cp_global_trees[CPTI_CLEANUP_TYPE]
971
972/* The type of the vtt parameter passed to subobject constructors and
973   destructors.  */
974#define vtt_parm_type                   cp_global_trees[CPTI_VTT_PARM_TYPE]
975
976/* A TREE_LIST of the dynamic classes whose vtables may have to be
977   emitted in this translation unit.  */
978
979#define keyed_classes                   cp_global_trees[CPTI_KEYED_CLASSES]
980
981/* Node to indicate default access. This must be distinct from the
982   access nodes in tree.h.  */
983
984#define access_default_node             null_node
985
986/* Global state.  */
987
988struct GTY(()) saved_scope {
989  vec<cxx_saved_binding, va_gc> *old_bindings;
990  tree old_namespace;
991  vec<tree, va_gc> *decl_ns_list;
992  tree class_name;
993  tree class_type;
994  tree access_specifier;
995  tree function_decl;
996  vec<tree, va_gc> *lang_base;
997  tree lang_name;
998  tree template_parms;
999  cp_binding_level *x_previous_class_level;
1000  tree x_saved_tree;
1001
1002  /* Only used for uses of this in trailing return type.  */
1003  tree x_current_class_ptr;
1004  tree x_current_class_ref;
1005
1006  int x_processing_template_decl;
1007  int x_processing_specialization;
1008  BOOL_BITFIELD x_processing_explicit_instantiation : 1;
1009  BOOL_BITFIELD need_pop_function_context : 1;
1010
1011  int unevaluated_operand;
1012  int inhibit_evaluation_warnings;
1013
1014  struct stmt_tree_s x_stmt_tree;
1015
1016  cp_binding_level *class_bindings;
1017  cp_binding_level *bindings;
1018
1019  struct saved_scope *prev;
1020};
1021
1022/* The current open namespace.  */
1023
1024#define current_namespace scope_chain->old_namespace
1025
1026/* The stack for namespaces of current declarations.  */
1027
1028#define decl_namespace_list scope_chain->decl_ns_list
1029
1030/* IDENTIFIER_NODE: name of current class */
1031
1032#define current_class_name scope_chain->class_name
1033
1034/* _TYPE: the type of the current class */
1035
1036#define current_class_type scope_chain->class_type
1037
1038/* When parsing a class definition, the access specifier most recently
1039   given by the user, or, if no access specifier was given, the
1040   default value appropriate for the kind of class (i.e., struct,
1041   class, or union).  */
1042
1043#define current_access_specifier scope_chain->access_specifier
1044
1045/* Pointer to the top of the language name stack.  */
1046
1047#define current_lang_base scope_chain->lang_base
1048#define current_lang_name scope_chain->lang_name
1049
1050/* When parsing a template declaration, a TREE_LIST represents the
1051   active template parameters.  Each node in the list represents one
1052   level of template parameters.  The innermost level is first in the
1053   list.  The depth of each level is stored as an INTEGER_CST in the
1054   TREE_PURPOSE of each node.  The parameters for that level are
1055   stored in the TREE_VALUE.  */
1056
1057#define current_template_parms scope_chain->template_parms
1058
1059#define processing_template_decl scope_chain->x_processing_template_decl
1060#define processing_specialization scope_chain->x_processing_specialization
1061#define processing_explicit_instantiation scope_chain->x_processing_explicit_instantiation
1062
1063/* The cached class binding level, from the most recently exited
1064   class, or NULL if none.  */
1065
1066#define previous_class_level scope_chain->x_previous_class_level
1067
1068/* A list of private types mentioned, for deferred access checking.  */
1069
1070extern GTY(()) struct saved_scope *scope_chain;
1071
1072struct GTY(()) cxx_int_tree_map {
1073  unsigned int uid;
1074  tree to;
1075};
1076
1077extern unsigned int cxx_int_tree_map_hash (const void *);
1078extern int cxx_int_tree_map_eq (const void *, const void *);
1079
1080/* Global state pertinent to the current function.  */
1081
1082struct GTY(()) language_function {
1083  struct c_language_function base;
1084
1085  tree x_cdtor_label;
1086  tree x_current_class_ptr;
1087  tree x_current_class_ref;
1088  tree x_eh_spec_block;
1089  tree x_in_charge_parm;
1090  tree x_vtt_parm;
1091  tree x_return_value;
1092  tree x_auto_return_pattern;
1093
1094  BOOL_BITFIELD returns_value : 1;
1095  BOOL_BITFIELD returns_null : 1;
1096  BOOL_BITFIELD returns_abnormally : 1;
1097  BOOL_BITFIELD x_in_function_try_handler : 1;
1098  BOOL_BITFIELD x_in_base_initializer : 1;
1099
1100  /* True if this function can throw an exception.  */
1101  BOOL_BITFIELD can_throw : 1;
1102
1103  htab_t GTY((param_is(struct named_label_entry))) x_named_labels;
1104  cp_binding_level *bindings;
1105  vec<tree, va_gc> *x_local_names;
1106  htab_t GTY((param_is (struct cxx_int_tree_map))) extern_decl_map;
1107};
1108
1109/* The current C++-specific per-function global variables.  */
1110
1111#define cp_function_chain (cfun->language)
1112
1113/* In a constructor destructor, the point at which all derived class
1114   destroying/construction has been done.  I.e., just before a
1115   constructor returns, or before any base class destroying will be done
1116   in a destructor.  */
1117
1118#define cdtor_label cp_function_chain->x_cdtor_label
1119
1120/* When we're processing a member function, current_class_ptr is the
1121   PARM_DECL for the `this' pointer.  The current_class_ref is an
1122   expression for `*this'.  */
1123
1124#define current_class_ptr                       \
1125  (*(cfun && cp_function_chain                  \
1126     ? &cp_function_chain->x_current_class_ptr  \
1127     : &scope_chain->x_current_class_ptr))
1128#define current_class_ref                       \
1129  (*(cfun && cp_function_chain                  \
1130     ? &cp_function_chain->x_current_class_ref  \
1131     : &scope_chain->x_current_class_ref))
1132
1133/* The EH_SPEC_BLOCK for the exception-specifiers for the current
1134   function, if any.  */
1135
1136#define current_eh_spec_block cp_function_chain->x_eh_spec_block
1137
1138/* The `__in_chrg' parameter for the current function.  Only used for
1139   constructors and destructors.  */
1140
1141#define current_in_charge_parm cp_function_chain->x_in_charge_parm
1142
1143/* The `__vtt_parm' parameter for the current function.  Only used for
1144   constructors and destructors.  */
1145
1146#define current_vtt_parm cp_function_chain->x_vtt_parm
1147
1148/* Set to 0 at beginning of a function definition, set to 1 if
1149   a return statement that specifies a return value is seen.  */
1150
1151#define current_function_returns_value cp_function_chain->returns_value
1152
1153/* Set to 0 at beginning of a function definition, set to 1 if
1154   a return statement with no argument is seen.  */
1155
1156#define current_function_returns_null cp_function_chain->returns_null
1157
1158/* Set to 0 at beginning of a function definition, set to 1 if
1159   a call to a noreturn function is seen.  */
1160
1161#define current_function_returns_abnormally \
1162  cp_function_chain->returns_abnormally
1163
1164/* Nonzero if we are processing a base initializer.  Zero elsewhere.  */
1165#define in_base_initializer cp_function_chain->x_in_base_initializer
1166
1167#define in_function_try_handler cp_function_chain->x_in_function_try_handler
1168
1169/* Expression always returned from function, or error_mark_node
1170   otherwise, for use by the automatic named return value optimization.  */
1171
1172#define current_function_return_value \
1173  (cp_function_chain->x_return_value)
1174
1175/* A type involving 'auto' to be used for return type deduction.  */
1176
1177#define current_function_auto_return_pattern \
1178  (cp_function_chain->x_auto_return_pattern)
1179
1180/* True if NAME is the IDENTIFIER_NODE for an overloaded "operator
1181   new" or "operator delete".  */
1182#define NEW_DELETE_OPNAME_P(NAME)               \
1183  ((NAME) == ansi_opname (NEW_EXPR)             \
1184   || (NAME) == ansi_opname (VEC_NEW_EXPR)      \
1185   || (NAME) == ansi_opname (DELETE_EXPR)       \
1186   || (NAME) == ansi_opname (VEC_DELETE_EXPR))
1187
1188#define ansi_opname(CODE) \
1189  (operator_name_info[(int) (CODE)].identifier)
1190#define ansi_assopname(CODE) \
1191  (assignment_operator_name_info[(int) (CODE)].identifier)
1192
1193/* TRUE if a tree code represents a statement.  */
1194extern bool statement_code_p[MAX_TREE_CODES];
1195
1196#define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1197
1198enum languages { lang_c, lang_cplusplus, lang_java };
1199
1200/* Macros to make error reporting functions' lives easier.  */
1201#define TYPE_IDENTIFIER(NODE) (DECL_NAME (TYPE_NAME (NODE)))
1202#define TYPE_LINKAGE_IDENTIFIER(NODE) \
1203  (TYPE_IDENTIFIER (TYPE_MAIN_VARIANT (NODE)))
1204#define TYPE_NAME_STRING(NODE) (IDENTIFIER_POINTER (TYPE_IDENTIFIER (NODE)))
1205#define TYPE_NAME_LENGTH(NODE) (IDENTIFIER_LENGTH (TYPE_IDENTIFIER (NODE)))
1206
1207/* Nonzero if NODE has no name for linkage purposes.  */
1208#define TYPE_ANONYMOUS_P(NODE) \
1209  (TAGGED_TYPE_P (NODE) && ANON_AGGRNAME_P (TYPE_LINKAGE_IDENTIFIER (NODE)))
1210
1211/* The _DECL for this _TYPE.  */
1212#define TYPE_MAIN_DECL(NODE) (TYPE_STUB_DECL (TYPE_MAIN_VARIANT (NODE)))
1213
1214/* Nonzero if T is a class (or struct or union) type.  Also nonzero
1215   for template type parameters, typename types, and instantiated
1216   template template parameters.  Keep these checks in ascending code
1217   order.  */
1218#define MAYBE_CLASS_TYPE_P(T)                                   \
1219  (TREE_CODE (T) == TEMPLATE_TYPE_PARM                  \
1220   || TREE_CODE (T) == TYPENAME_TYPE                    \
1221   || TREE_CODE (T) == TYPEOF_TYPE                      \
1222   || TREE_CODE (T) == BOUND_TEMPLATE_TEMPLATE_PARM     \
1223   || TREE_CODE (T) == DECLTYPE_TYPE                    \
1224   || CLASS_TYPE_P (T))
1225
1226/* Set CLASS_TYPE_P for T to VAL.  T must be a class, struct, or
1227   union type.  */
1228#define SET_CLASS_TYPE_P(T, VAL) \
1229  (TYPE_LANG_FLAG_5 (T) = (VAL))
1230
1231/* Nonzero if T is a class type.  Zero for template type parameters,
1232   typename types, and so forth.  */
1233#define CLASS_TYPE_P(T) \
1234  (RECORD_OR_UNION_CODE_P (TREE_CODE (T)) && TYPE_LANG_FLAG_5 (T))
1235
1236/* Nonzero if T is a class type but not an union.  */
1237#define NON_UNION_CLASS_TYPE_P(T) \
1238  (CLASS_TYPE_P (T) && TREE_CODE (T) != UNION_TYPE)
1239
1240/* Keep these checks in ascending code order.  */
1241#define RECORD_OR_UNION_CODE_P(T)       \
1242  ((T) == RECORD_TYPE || (T) == UNION_TYPE)
1243#define TAGGED_TYPE_P(T) \
1244  (CLASS_TYPE_P (T) || TREE_CODE (T) == ENUMERAL_TYPE)
1245#define IS_OVERLOAD_TYPE(T) TAGGED_TYPE_P (T)
1246
1247/* True if this a "Java" type, defined in 'extern "Java"'.  */
1248#define TYPE_FOR_JAVA(NODE) TYPE_LANG_FLAG_3 (NODE)
1249
1250/* True if this type is dependent.  This predicate is only valid if
1251   TYPE_DEPENDENT_P_VALID is true.  */
1252#define TYPE_DEPENDENT_P(NODE) TYPE_LANG_FLAG_0 (NODE)
1253
1254/* True if dependent_type_p has been called for this type, with the
1255   result that TYPE_DEPENDENT_P is valid.  */
1256#define TYPE_DEPENDENT_P_VALID(NODE) TYPE_LANG_FLAG_6(NODE)
1257
1258/* Nonzero if this type is const-qualified.  */
1259#define CP_TYPE_CONST_P(NODE)                           \
1260  ((cp_type_quals (NODE) & TYPE_QUAL_CONST) != 0)
1261
1262/* Nonzero if this type is volatile-qualified.  */
1263#define CP_TYPE_VOLATILE_P(NODE)                        \
1264  ((cp_type_quals (NODE) & TYPE_QUAL_VOLATILE) != 0)
1265
1266/* Nonzero if this type is restrict-qualified.  */
1267#define CP_TYPE_RESTRICT_P(NODE)                        \
1268  ((cp_type_quals (NODE) & TYPE_QUAL_RESTRICT) != 0)
1269
1270/* Nonzero if this type is const-qualified, but not
1271   volatile-qualified.  Other qualifiers are ignored.  This macro is
1272   used to test whether or not it is OK to bind an rvalue to a
1273   reference.  */
1274#define CP_TYPE_CONST_NON_VOLATILE_P(NODE)                              \
1275  ((cp_type_quals (NODE) & (TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE))      \
1276   == TYPE_QUAL_CONST)
1277
1278#define FUNCTION_ARG_CHAIN(NODE) \
1279  TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (NODE)))
1280
1281/* Given a FUNCTION_DECL, returns the first TREE_LIST out of TYPE_ARG_TYPES
1282   which refers to a user-written parameter.  */
1283#define FUNCTION_FIRST_USER_PARMTYPE(NODE) \
1284  skip_artificial_parms_for ((NODE), TYPE_ARG_TYPES (TREE_TYPE (NODE)))
1285
1286/* Similarly, but for DECL_ARGUMENTS.  */
1287#define FUNCTION_FIRST_USER_PARM(NODE) \
1288  skip_artificial_parms_for ((NODE), DECL_ARGUMENTS (NODE))
1289
1290/* Nonzero iff TYPE is derived from PARENT. Ignores accessibility and
1291   ambiguity issues.  */
1292#define DERIVED_FROM_P(PARENT, TYPE) \
1293  (lookup_base ((TYPE), (PARENT), ba_any, NULL, tf_warning_or_error)\
1294   != NULL_TREE)
1295
1296/* Gives the visibility specification for a class type.  */
1297#define CLASSTYPE_VISIBILITY(TYPE)              \
1298        DECL_VISIBILITY (TYPE_MAIN_DECL (TYPE))
1299#define CLASSTYPE_VISIBILITY_SPECIFIED(TYPE)    \
1300        DECL_VISIBILITY_SPECIFIED (TYPE_MAIN_DECL (TYPE))
1301
1302typedef struct GTY (()) tree_pair_s {
1303  tree purpose;
1304  tree value;
1305} tree_pair_s;
1306typedef tree_pair_s *tree_pair_p;
1307
1308/* This is a few header flags for 'struct lang_type'.  Actually,
1309   all but the first are used only for lang_type_class; they
1310   are put in this structure to save space.  */
1311struct GTY(()) lang_type_header {
1312  BOOL_BITFIELD is_lang_type_class : 1;
1313
1314  BOOL_BITFIELD has_type_conversion : 1;
1315  BOOL_BITFIELD has_copy_ctor : 1;
1316  BOOL_BITFIELD has_default_ctor : 1;
1317  BOOL_BITFIELD const_needs_init : 1;
1318  BOOL_BITFIELD ref_needs_init : 1;
1319  BOOL_BITFIELD has_const_copy_assign : 1;
1320
1321  BOOL_BITFIELD spare : 1;
1322};
1323
1324/* This structure provides additional information above and beyond
1325   what is provide in the ordinary tree_type.  In the past, we used it
1326   for the types of class types, template parameters types, typename
1327   types, and so forth.  However, there can be many (tens to hundreds
1328   of thousands) of template parameter types in a compilation, and
1329   there's no need for this additional information in that case.
1330   Therefore, we now use this data structure only for class types.
1331
1332   In the past, it was thought that there would be relatively few
1333   class types.  However, in the presence of heavy use of templates,
1334   many (i.e., thousands) of classes can easily be generated.
1335   Therefore, we should endeavor to keep the size of this structure to
1336   a minimum.  */
1337struct GTY(()) lang_type_class {
1338  struct lang_type_header h;
1339
1340  unsigned char align;
1341
1342  unsigned has_mutable : 1;
1343  unsigned com_interface : 1;
1344  unsigned non_pod_class : 1;
1345  unsigned nearly_empty_p : 1;
1346  unsigned user_align : 1;
1347  unsigned has_copy_assign : 1;
1348  unsigned has_new : 1;
1349  unsigned has_array_new : 1;
1350
1351  unsigned gets_delete : 2;
1352  unsigned interface_only : 1;
1353  unsigned interface_unknown : 1;
1354  unsigned contains_empty_class_p : 1;
1355  unsigned anon_aggr : 1;
1356  unsigned non_zero_init : 1;
1357  unsigned empty_p : 1;
1358
1359  unsigned vec_new_uses_cookie : 1;
1360  unsigned declared_class : 1;
1361  unsigned diamond_shaped : 1;
1362  unsigned repeated_base : 1;
1363  unsigned being_defined : 1;
1364  unsigned java_interface : 1;
1365  unsigned debug_requested : 1;
1366  unsigned fields_readonly : 1;
1367
1368  unsigned use_template : 2;
1369  unsigned ptrmemfunc_flag : 1;
1370  unsigned was_anonymous : 1;
1371  unsigned lazy_default_ctor : 1;
1372  unsigned lazy_copy_ctor : 1;
1373  unsigned lazy_copy_assign : 1;
1374  unsigned lazy_destructor : 1;
1375
1376  unsigned has_const_copy_ctor : 1;
1377  unsigned has_complex_copy_ctor : 1;
1378  unsigned has_complex_copy_assign : 1;
1379  unsigned non_aggregate : 1;
1380  unsigned has_complex_dflt : 1;
1381  unsigned has_list_ctor : 1;
1382  unsigned non_std_layout : 1;
1383  unsigned is_literal : 1;
1384
1385  unsigned lazy_move_ctor : 1;
1386  unsigned lazy_move_assign : 1;
1387  unsigned has_complex_move_ctor : 1;
1388  unsigned has_complex_move_assign : 1;
1389  unsigned has_constexpr_ctor : 1;
1390  unsigned is_final : 1;
1391
1392  /* When adding a flag here, consider whether or not it ought to
1393     apply to a template instance if it applies to the template.  If
1394     so, make sure to copy it in instantiate_class_template!  */
1395
1396  /* There are some bits left to fill out a 32-bit word.  Keep track
1397     of this by updating the size of this bitfield whenever you add or
1398     remove a flag.  */
1399  unsigned dummy : 2;
1400
1401  tree primary_base;
1402  vec<tree_pair_s, va_gc> *vcall_indices;
1403  tree vtables;
1404  tree typeinfo_var;
1405  vec<tree, va_gc> *vbases;
1406  binding_table nested_udts;
1407  tree as_base;
1408  vec<tree, va_gc> *pure_virtuals;
1409  tree friend_classes;
1410  vec<tree, va_gc> * GTY((reorder ("resort_type_method_vec"))) methods;
1411  tree key_method;
1412  tree decl_list;
1413  tree template_info;
1414  tree befriending_classes;
1415  /* In a RECORD_TYPE, information specific to Objective-C++, such
1416     as a list of adopted protocols or a pointer to a corresponding
1417     @interface.  See objc/objc-act.h for details.  */
1418  tree objc_info;
1419  /* sorted_fields is sorted based on a pointer, so we need to be able
1420     to resort it if pointers get rearranged.  */
1421  struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields")))
1422    sorted_fields;
1423  /* FIXME reuse another field?  */
1424  tree lambda_expr;
1425};
1426
1427struct GTY(()) lang_type_ptrmem {
1428  struct lang_type_header h;
1429  tree record;
1430};
1431
1432struct GTY((variable_size)) lang_type {
1433  union lang_type_u
1434  {
1435    struct lang_type_header GTY((skip (""))) h;
1436    struct lang_type_class  GTY((tag ("1"))) c;
1437    struct lang_type_ptrmem GTY((tag ("0"))) ptrmem;
1438  } GTY((desc ("%h.h.is_lang_type_class"))) u;
1439};
1440
1441#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
1442
1443#define LANG_TYPE_CLASS_CHECK(NODE) __extension__               \
1444({  struct lang_type *lt = TYPE_LANG_SPECIFIC (NODE);           \
1445    if (! lt->u.h.is_lang_type_class)                           \
1446      lang_check_failed (__FILE__, __LINE__, __FUNCTION__);     \
1447    &lt->u.c; })
1448
1449#define LANG_TYPE_PTRMEM_CHECK(NODE) __extension__              \
1450({  struct lang_type *lt = TYPE_LANG_SPECIFIC (NODE);           \
1451    if (lt->u.h.is_lang_type_class)                             \
1452      lang_check_failed (__FILE__, __LINE__, __FUNCTION__);     \
1453    &lt->u.ptrmem; })
1454
1455#else
1456
1457#define LANG_TYPE_CLASS_CHECK(NODE) (&TYPE_LANG_SPECIFIC (NODE)->u.c)
1458#define LANG_TYPE_PTRMEM_CHECK(NODE) (&TYPE_LANG_SPECIFIC (NODE)->u.ptrmem)
1459
1460#endif /* ENABLE_TREE_CHECKING */
1461
1462/* Nonzero for _CLASSTYPE means that operator delete is defined.  */
1463#define TYPE_GETS_DELETE(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->gets_delete)
1464#define TYPE_GETS_REG_DELETE(NODE) (TYPE_GETS_DELETE (NODE) & 1)
1465
1466/* Nonzero if `new NODE[x]' should cause the allocation of extra
1467   storage to indicate how many array elements are in use.  */
1468#define TYPE_VEC_NEW_USES_COOKIE(NODE)                  \
1469  (CLASS_TYPE_P (NODE)                                  \
1470   && LANG_TYPE_CLASS_CHECK (NODE)->vec_new_uses_cookie)
1471
1472/* Nonzero means that this _CLASSTYPE node defines ways of converting
1473   itself to other types.  */
1474#define TYPE_HAS_CONVERSION(NODE) \
1475  (LANG_TYPE_CLASS_CHECK (NODE)->h.has_type_conversion)
1476
1477/* Nonzero means that NODE (a class type) has a default constructor --
1478   but that it has not yet been declared.  */
1479#define CLASSTYPE_LAZY_DEFAULT_CTOR(NODE) \
1480  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_default_ctor)
1481
1482/* Nonzero means that NODE (a class type) has a copy constructor --
1483   but that it has not yet been declared.  */
1484#define CLASSTYPE_LAZY_COPY_CTOR(NODE) \
1485  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_copy_ctor)
1486
1487/* Nonzero means that NODE (a class type) has a move constructor --
1488   but that it has not yet been declared.  */
1489#define CLASSTYPE_LAZY_MOVE_CTOR(NODE) \
1490  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_move_ctor)
1491
1492/* Nonzero means that NODE (a class type) has an assignment operator
1493   -- but that it has not yet been declared.  */
1494#define CLASSTYPE_LAZY_COPY_ASSIGN(NODE) \
1495  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_copy_assign)
1496
1497/* Nonzero means that NODE (a class type) has an assignment operator
1498   -- but that it has not yet been declared.  */
1499#define CLASSTYPE_LAZY_MOVE_ASSIGN(NODE) \
1500  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_move_assign)
1501
1502/* Nonzero means that NODE (a class type) has a destructor -- but that
1503   it has not yet been declared.  */
1504#define CLASSTYPE_LAZY_DESTRUCTOR(NODE) \
1505  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_destructor)
1506
1507/* Nonzero means that NODE (a class type) is final */
1508#define CLASSTYPE_FINAL(NODE) \
1509  (LANG_TYPE_CLASS_CHECK (NODE)->is_final)
1510
1511
1512/* Nonzero means that this _CLASSTYPE node overloads operator=(X&).  */
1513#define TYPE_HAS_COPY_ASSIGN(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_copy_assign)
1514
1515/* True iff the class type NODE has an "operator =" whose parameter
1516   has a parameter of type "const X&".  */
1517#define TYPE_HAS_CONST_COPY_ASSIGN(NODE) \
1518  (LANG_TYPE_CLASS_CHECK (NODE)->h.has_const_copy_assign)
1519
1520/* Nonzero means that this _CLASSTYPE node has an X(X&) constructor.  */
1521#define TYPE_HAS_COPY_CTOR(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->h.has_copy_ctor)
1522#define TYPE_HAS_CONST_COPY_CTOR(NODE) \
1523  (LANG_TYPE_CLASS_CHECK (NODE)->has_const_copy_ctor)
1524
1525/* Nonzero if this class has an X(initializer_list<T>) constructor.  */
1526#define TYPE_HAS_LIST_CTOR(NODE) \
1527  (LANG_TYPE_CLASS_CHECK (NODE)->has_list_ctor)
1528
1529/* Nonzero if this class has a constexpr constructor other than a copy/move
1530   constructor.  Note that a class can have constexpr constructors for
1531   static initialization even if it isn't a literal class.  */
1532#define TYPE_HAS_CONSTEXPR_CTOR(NODE) \
1533  (LANG_TYPE_CLASS_CHECK (NODE)->has_constexpr_ctor)
1534
1535/* Nonzero if this class defines an overloaded operator new.  (An
1536   operator new [] doesn't count.)  */
1537#define TYPE_HAS_NEW_OPERATOR(NODE) \
1538  (LANG_TYPE_CLASS_CHECK (NODE)->has_new)
1539
1540/* Nonzero if this class defines an overloaded operator new[].  */
1541#define TYPE_HAS_ARRAY_NEW_OPERATOR(NODE) \
1542  (LANG_TYPE_CLASS_CHECK (NODE)->has_array_new)
1543
1544/* Nonzero means that this type is being defined.  I.e., the left brace
1545   starting the definition of this type has been seen.  */
1546#define TYPE_BEING_DEFINED(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->being_defined)
1547
1548/* Nonzero means that this type is either complete or being defined, so we
1549   can do lookup in it.  */
1550#define COMPLETE_OR_OPEN_TYPE_P(NODE) \
1551  (COMPLETE_TYPE_P (NODE) || (CLASS_TYPE_P (NODE) && TYPE_BEING_DEFINED (NODE)))
1552
1553/* Mark bits for repeated base checks.  */
1554#define TYPE_MARKED_P(NODE) TREE_LANG_FLAG_6 (TYPE_CHECK (NODE))
1555
1556/* Nonzero if the class NODE has multiple paths to the same (virtual)
1557   base object.  */
1558#define CLASSTYPE_DIAMOND_SHAPED_P(NODE) \
1559  (LANG_TYPE_CLASS_CHECK(NODE)->diamond_shaped)
1560
1561/* Nonzero if the class NODE has multiple instances of the same base
1562   type.  */
1563#define CLASSTYPE_REPEATED_BASE_P(NODE) \
1564  (LANG_TYPE_CLASS_CHECK(NODE)->repeated_base)
1565
1566/* The member function with which the vtable will be emitted:
1567   the first noninline non-pure-virtual member function.  NULL_TREE
1568   if there is no key function or if this is a class template */
1569#define CLASSTYPE_KEY_METHOD(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->key_method)
1570
1571/* Vector member functions defined in this class.  Each element is
1572   either a FUNCTION_DECL, a TEMPLATE_DECL, or an OVERLOAD.  All
1573   functions with the same name end up in the same slot.  The first
1574   two elements are for constructors, and destructors, respectively.
1575   All template conversion operators to innermost template dependent
1576   types are overloaded on the next slot, if they exist.  Note, the
1577   names for these functions will not all be the same.  The
1578   non-template conversion operators & templated conversions to
1579   non-innermost template types are next, followed by ordinary member
1580   functions.  There may be empty entries at the end of the vector.
1581   The conversion operators are unsorted. The ordinary member
1582   functions are sorted, once the class is complete.  */
1583#define CLASSTYPE_METHOD_VEC(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->methods)
1584
1585/* For class templates, this is a TREE_LIST of all member data,
1586   functions, types, and friends in the order of declaration.
1587   The TREE_PURPOSE of each TREE_LIST is NULL_TREE for a friend,
1588   and the RECORD_TYPE for the class template otherwise.  */
1589#define CLASSTYPE_DECL_LIST(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->decl_list)
1590
1591/* The slot in the CLASSTYPE_METHOD_VEC where constructors go.  */
1592#define CLASSTYPE_CONSTRUCTOR_SLOT 0
1593
1594/* The slot in the CLASSTYPE_METHOD_VEC where destructors go.  */
1595#define CLASSTYPE_DESTRUCTOR_SLOT 1
1596
1597/* The first slot in the CLASSTYPE_METHOD_VEC where conversion
1598   operators can appear.  */
1599#define CLASSTYPE_FIRST_CONVERSION_SLOT 2
1600
1601/* A FUNCTION_DECL or OVERLOAD for the constructors for NODE.  These
1602   are the constructors that take an in-charge parameter.  */
1603#define CLASSTYPE_CONSTRUCTORS(NODE) \
1604  ((*CLASSTYPE_METHOD_VEC (NODE))[CLASSTYPE_CONSTRUCTOR_SLOT])
1605
1606/* A FUNCTION_DECL for the destructor for NODE.  These are the
1607   destructors that take an in-charge parameter.  If
1608   CLASSTYPE_LAZY_DESTRUCTOR is true, then this entry will be NULL
1609   until the destructor is created with lazily_declare_fn.  */
1610#define CLASSTYPE_DESTRUCTORS(NODE) \
1611  (CLASSTYPE_METHOD_VEC (NODE)                                                \
1612   ? (*CLASSTYPE_METHOD_VEC (NODE))[CLASSTYPE_DESTRUCTOR_SLOT]                \
1613   : NULL_TREE)
1614
1615/* A dictionary of the nested user-defined-types (class-types, or enums)
1616   found within this class.  This table includes nested member class
1617   templates.  */
1618#define CLASSTYPE_NESTED_UTDS(NODE) \
1619   (LANG_TYPE_CLASS_CHECK (NODE)->nested_udts)
1620
1621/* Nonzero if NODE has a primary base class, i.e., a base class with
1622   which it shares the virtual function table pointer.  */
1623#define CLASSTYPE_HAS_PRIMARY_BASE_P(NODE) \
1624  (CLASSTYPE_PRIMARY_BINFO (NODE) != NULL_TREE)
1625
1626/* If non-NULL, this is the binfo for the primary base class, i.e.,
1627   the base class which contains the virtual function table pointer
1628   for this class.  */
1629#define CLASSTYPE_PRIMARY_BINFO(NODE) \
1630  (LANG_TYPE_CLASS_CHECK (NODE)->primary_base)
1631
1632/* A vector of BINFOs for the direct and indirect virtual base classes
1633   that this type uses in a post-order depth-first left-to-right
1634   order.  (In other words, these bases appear in the order that they
1635   should be initialized.)  */
1636#define CLASSTYPE_VBASECLASSES(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->vbases)
1637
1638/* The type corresponding to NODE when NODE is used as a base class,
1639   i.e., NODE without virtual base classes.  */
1640
1641#define CLASSTYPE_AS_BASE(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->as_base)
1642
1643/* True iff NODE is the CLASSTYPE_AS_BASE version of some type.  */
1644
1645#define IS_FAKE_BASE_TYPE(NODE)                                 \
1646  (TREE_CODE (NODE) == RECORD_TYPE                              \
1647   && TYPE_CONTEXT (NODE) && CLASS_TYPE_P (TYPE_CONTEXT (NODE)) \
1648   && CLASSTYPE_AS_BASE (TYPE_CONTEXT (NODE)) == (NODE))
1649
1650/* These are the size and alignment of the type without its virtual
1651   base classes, for when we use this type as a base itself.  */
1652#define CLASSTYPE_SIZE(NODE) TYPE_SIZE (CLASSTYPE_AS_BASE (NODE))
1653#define CLASSTYPE_SIZE_UNIT(NODE) TYPE_SIZE_UNIT (CLASSTYPE_AS_BASE (NODE))
1654#define CLASSTYPE_ALIGN(NODE) TYPE_ALIGN (CLASSTYPE_AS_BASE (NODE))
1655#define CLASSTYPE_USER_ALIGN(NODE) TYPE_USER_ALIGN (CLASSTYPE_AS_BASE (NODE))
1656
1657/* The alignment of NODE, without its virtual bases, in bytes.  */
1658#define CLASSTYPE_ALIGN_UNIT(NODE) \
1659  (CLASSTYPE_ALIGN (NODE) / BITS_PER_UNIT)
1660
1661/* True if this a Java interface type, declared with
1662   '__attribute__ ((java_interface))'.  */
1663#define TYPE_JAVA_INTERFACE(NODE) \
1664  (LANG_TYPE_CLASS_CHECK (NODE)->java_interface)
1665
1666/* A vec<tree> of virtual functions which cannot be inherited by
1667   derived classes.  When deriving from this type, the derived
1668   class must provide its own definition for each of these functions.  */
1669#define CLASSTYPE_PURE_VIRTUALS(NODE) \
1670  (LANG_TYPE_CLASS_CHECK (NODE)->pure_virtuals)
1671
1672/* Nonzero means that this type is an abstract class type.  */
1673#define ABSTRACT_CLASS_TYPE_P(NODE) \
1674  (CLASS_TYPE_P (NODE) && CLASSTYPE_PURE_VIRTUALS(NODE))
1675
1676/* Nonzero means that this type has an X() constructor.  */
1677#define TYPE_HAS_DEFAULT_CONSTRUCTOR(NODE) \
1678  (LANG_TYPE_CLASS_CHECK (NODE)->h.has_default_ctor)
1679
1680/* Nonzero means that this type contains a mutable member.  */
1681#define CLASSTYPE_HAS_MUTABLE(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_mutable)
1682#define TYPE_HAS_MUTABLE_P(NODE) (cp_has_mutable_p (NODE))
1683
1684/* Nonzero means that this class type is not POD for the purpose of layout
1685   (as defined in the ABI).  This is different from the language's POD.  */
1686#define CLASSTYPE_NON_LAYOUT_POD_P(NODE) \
1687  (LANG_TYPE_CLASS_CHECK (NODE)->non_pod_class)
1688
1689/* Nonzero means that this class type is a non-standard-layout class.  */
1690#define CLASSTYPE_NON_STD_LAYOUT(NODE) \
1691  (LANG_TYPE_CLASS_CHECK (NODE)->non_std_layout)
1692
1693/* Nonzero means that this class contains pod types whose default
1694   initialization is not a zero initialization (namely, pointers to
1695   data members).  */
1696#define CLASSTYPE_NON_ZERO_INIT_P(NODE) \
1697  (LANG_TYPE_CLASS_CHECK (NODE)->non_zero_init)
1698
1699/* Nonzero if this class is "empty" in the sense of the C++ ABI.  */
1700#define CLASSTYPE_EMPTY_P(NODE) \
1701  (LANG_TYPE_CLASS_CHECK (NODE)->empty_p)
1702
1703/* Nonzero if this class is "nearly empty", i.e., contains only a
1704   virtual function table pointer.  */
1705#define CLASSTYPE_NEARLY_EMPTY_P(NODE) \
1706  (LANG_TYPE_CLASS_CHECK (NODE)->nearly_empty_p)
1707
1708/* Nonzero if this class contains an empty subobject.  */
1709#define CLASSTYPE_CONTAINS_EMPTY_CLASS_P(NODE) \
1710  (LANG_TYPE_CLASS_CHECK (NODE)->contains_empty_class_p)
1711
1712/* A list of class types of which this type is a friend.  The
1713   TREE_VALUE is normally a TYPE, but will be a TEMPLATE_DECL in the
1714   case of a template friend.  */
1715#define CLASSTYPE_FRIEND_CLASSES(NODE) \
1716  (LANG_TYPE_CLASS_CHECK (NODE)->friend_classes)
1717
1718/* A list of the classes which grant friendship to this class.  */
1719#define CLASSTYPE_BEFRIENDING_CLASSES(NODE) \
1720  (LANG_TYPE_CLASS_CHECK (NODE)->befriending_classes)
1721
1722/* The associated LAMBDA_EXPR that made this class.  */
1723#define CLASSTYPE_LAMBDA_EXPR(NODE) \
1724  (LANG_TYPE_CLASS_CHECK (NODE)->lambda_expr)
1725/* The extra mangling scope for this closure type.  */
1726#define LAMBDA_TYPE_EXTRA_SCOPE(NODE) \
1727  (LAMBDA_EXPR_EXTRA_SCOPE (CLASSTYPE_LAMBDA_EXPR (NODE)))
1728
1729/* Say whether this node was declared as a "class" or a "struct".  */
1730#define CLASSTYPE_DECLARED_CLASS(NODE) \
1731  (LANG_TYPE_CLASS_CHECK (NODE)->declared_class)
1732
1733/* Nonzero if this class has const members
1734   which have no specified initialization.  */
1735#define CLASSTYPE_READONLY_FIELDS_NEED_INIT(NODE)       \
1736  (TYPE_LANG_SPECIFIC (NODE)                            \
1737   ? LANG_TYPE_CLASS_CHECK (NODE)->h.const_needs_init : 0)
1738#define SET_CLASSTYPE_READONLY_FIELDS_NEED_INIT(NODE, VALUE) \
1739  (LANG_TYPE_CLASS_CHECK (NODE)->h.const_needs_init = (VALUE))
1740
1741/* Nonzero if this class has ref members
1742   which have no specified initialization.  */
1743#define CLASSTYPE_REF_FIELDS_NEED_INIT(NODE)            \
1744  (TYPE_LANG_SPECIFIC (NODE)                            \
1745   ? LANG_TYPE_CLASS_CHECK (NODE)->h.ref_needs_init : 0)
1746#define SET_CLASSTYPE_REF_FIELDS_NEED_INIT(NODE, VALUE) \
1747  (LANG_TYPE_CLASS_CHECK (NODE)->h.ref_needs_init = (VALUE))
1748
1749/* Nonzero if this class is included from a header file which employs
1750   `#pragma interface', and it is not included in its implementation file.  */
1751#define CLASSTYPE_INTERFACE_ONLY(NODE) \
1752  (LANG_TYPE_CLASS_CHECK (NODE)->interface_only)
1753
1754/* True if we have already determined whether or not vtables, VTTs,
1755   typeinfo, and other similar per-class data should be emitted in
1756   this translation unit.  This flag does not indicate whether or not
1757   these items should be emitted; it only indicates that we know one
1758   way or the other.  */
1759#define CLASSTYPE_INTERFACE_KNOWN(NODE) \
1760  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown == 0)
1761/* The opposite of CLASSTYPE_INTERFACE_KNOWN.  */
1762#define CLASSTYPE_INTERFACE_UNKNOWN(NODE) \
1763  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown)
1764
1765#define SET_CLASSTYPE_INTERFACE_UNKNOWN_X(NODE,X) \
1766  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown = !!(X))
1767#define SET_CLASSTYPE_INTERFACE_UNKNOWN(NODE) \
1768  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown = 1)
1769#define SET_CLASSTYPE_INTERFACE_KNOWN(NODE) \
1770  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown = 0)
1771
1772/* Nonzero if a _DECL node requires us to output debug info for this class.  */
1773#define CLASSTYPE_DEBUG_REQUESTED(NODE) \
1774  (LANG_TYPE_CLASS_CHECK (NODE)->debug_requested)
1775
1776/* Additional macros for inheritance information.  */
1777
1778/* Nonzero means that this class is on a path leading to a new vtable.  */
1779#define BINFO_VTABLE_PATH_MARKED(NODE) BINFO_FLAG_1 (NODE)
1780
1781/* Nonzero means B (a BINFO) has its own vtable.  Any copies will not
1782   have this flag set.  */
1783#define BINFO_NEW_VTABLE_MARKED(B) (BINFO_FLAG_2 (B))
1784
1785/* Compare a BINFO_TYPE with another type for equality.  For a binfo,
1786   this is functionally equivalent to using same_type_p, but
1787   measurably faster.  At least one of the arguments must be a
1788   BINFO_TYPE.  The other can be a BINFO_TYPE or a regular type.  If
1789   BINFO_TYPE(T) ever stops being the main variant of the class the
1790   binfo is for, this macro must change.  */
1791#define SAME_BINFO_TYPE_P(A, B) ((A) == (B))
1792
1793/* Any subobject that needs a new vtable must have a vptr and must not
1794   be a non-virtual primary base (since it would then use the vtable from a
1795   derived class and never become non-primary.)  */
1796#define SET_BINFO_NEW_VTABLE_MARKED(B)                                   \
1797  (BINFO_NEW_VTABLE_MARKED (B) = 1,                                      \
1798   gcc_assert (!BINFO_PRIMARY_P (B) || BINFO_VIRTUAL_P (B)),             \
1799   gcc_assert (TYPE_VFIELD (BINFO_TYPE (B))))
1800
1801/* Nonzero if this binfo is for a dependent base - one that should not
1802   be searched.  */
1803#define BINFO_DEPENDENT_BASE_P(NODE) BINFO_FLAG_3 (NODE)
1804
1805/* Nonzero if this binfo has lost its primary base binfo (because that
1806   is a nearly-empty virtual base that has been taken by some other
1807   base in the complete hierarchy.  */
1808#define BINFO_LOST_PRIMARY_P(NODE) BINFO_FLAG_4 (NODE)
1809
1810/* Nonzero if this BINFO is a primary base class.  */
1811#define BINFO_PRIMARY_P(NODE) BINFO_FLAG_5(NODE)
1812
1813/* Used by various search routines.  */
1814#define IDENTIFIER_MARKED(NODE) TREE_LANG_FLAG_0 (NODE)
1815
1816/* A vec<tree_pair_s> of the vcall indices associated with the class
1817   NODE.  The PURPOSE of each element is a FUNCTION_DECL for a virtual
1818   function.  The VALUE is the index into the virtual table where the
1819   vcall offset for that function is stored, when NODE is a virtual
1820   base.  */
1821#define CLASSTYPE_VCALL_INDICES(NODE) \
1822  (LANG_TYPE_CLASS_CHECK (NODE)->vcall_indices)
1823
1824/* The various vtables for the class NODE.  The primary vtable will be
1825   first, followed by the construction vtables and VTT, if any.  */
1826#define CLASSTYPE_VTABLES(NODE) \
1827  (LANG_TYPE_CLASS_CHECK (NODE)->vtables)
1828
1829/* The std::type_info variable representing this class, or NULL if no
1830   such variable has been created.  This field is only set for the
1831   TYPE_MAIN_VARIANT of the class.  */
1832#define CLASSTYPE_TYPEINFO_VAR(NODE) \
1833  (LANG_TYPE_CLASS_CHECK (NODE)->typeinfo_var)
1834
1835/* Accessor macros for the BINFO_VIRTUALS list.  */
1836
1837/* The number of bytes by which to adjust the `this' pointer when
1838   calling this virtual function.  Subtract this value from the this
1839   pointer. Always non-NULL, might be constant zero though.  */
1840#define BV_DELTA(NODE) (TREE_PURPOSE (NODE))
1841
1842/* If non-NULL, the vtable index at which to find the vcall offset
1843   when calling this virtual function.  Add the value at that vtable
1844   index to the this pointer.  */
1845#define BV_VCALL_INDEX(NODE) (TREE_TYPE (NODE))
1846
1847/* The function to call.  */
1848#define BV_FN(NODE) (TREE_VALUE (NODE))
1849
1850/* Whether or not this entry is for a lost primary virtual base.  */
1851#define BV_LOST_PRIMARY(NODE) (TREE_LANG_FLAG_0 (NODE))
1852
1853/* For FUNCTION_TYPE or METHOD_TYPE, a list of the exceptions that
1854   this type can raise.  Each TREE_VALUE is a _TYPE.  The TREE_VALUE
1855   will be NULL_TREE to indicate a throw specification of `()', or
1856   no exceptions allowed.  For a noexcept specification, TREE_VALUE
1857   is NULL_TREE and TREE_PURPOSE is the constant-expression.  For
1858   a deferred noexcept-specification, TREE_PURPOSE is a DEFERRED_NOEXCEPT
1859   (for templates) or an OVERLOAD list of functions (for implicitly
1860   declared functions).  */
1861#define TYPE_RAISES_EXCEPTIONS(NODE) TYPE_LANG_SLOT_1 (NODE)
1862
1863/* For FUNCTION_TYPE or METHOD_TYPE, return 1 iff it is declared `throw()'
1864   or noexcept(true).  */
1865#define TYPE_NOTHROW_P(NODE) nothrow_spec_p (TYPE_RAISES_EXCEPTIONS (NODE))
1866
1867/* For FUNCTION_TYPE or METHOD_TYPE, true if NODE is noexcept.  This is the
1868   case for things declared noexcept(true) and, with -fnothrow-opt, for
1869   throw() functions.  */
1870#define TYPE_NOEXCEPT_P(NODE) type_noexcept_p (NODE)
1871
1872/* The binding level associated with the namespace.  */
1873#define NAMESPACE_LEVEL(NODE) \
1874  (LANG_DECL_NS_CHECK (NODE)->level)
1875
1876/* Flags shared by all forms of DECL_LANG_SPECIFIC.
1877
1878   Some of the flags live here only to make lang_decl_min/fn smaller.  Do
1879   not make this struct larger than 32 bits; instead, make sel smaller.  */
1880
1881struct GTY(()) lang_decl_base {
1882  unsigned selector : 16;   /* Larger than necessary for faster access.  */
1883  ENUM_BITFIELD(languages) language : 4;
1884  unsigned use_template : 2;
1885  unsigned not_really_extern : 1;          /* var or fn */
1886  unsigned initialized_in_class : 1;       /* var or fn */
1887  unsigned repo_available_p : 1;           /* var or fn */
1888  unsigned threadprivate_or_deleted_p : 1; /* var or fn */
1889  unsigned anticipated_p : 1;              /* fn, type or template */
1890  unsigned friend_attr : 1;                /* fn, type or template */
1891  unsigned template_conv_p : 1;            /* var or template */
1892  unsigned odr_used : 1;                   /* var or fn */
1893  unsigned u2sel : 1;
1894  /* 1 spare bit */
1895};
1896
1897/* True for DECL codes which have template info and access.  */
1898#define LANG_DECL_HAS_MIN(NODE)                 \
1899  (TREE_CODE (NODE) == FUNCTION_DECL            \
1900   || TREE_CODE (NODE) == FIELD_DECL            \
1901   || TREE_CODE (NODE) == VAR_DECL              \
1902   || TREE_CODE (NODE) == CONST_DECL            \
1903   || TREE_CODE (NODE) == TYPE_DECL             \
1904   || TREE_CODE (NODE) == TEMPLATE_DECL         \
1905   || TREE_CODE (NODE) == USING_DECL)
1906
1907/* DECL_LANG_SPECIFIC for the above codes.  */
1908
1909struct GTY(()) lang_decl_min {
1910  struct lang_decl_base base;
1911
1912  /* In a FUNCTION_DECL for which DECL_THUNK_P holds, this is
1913     THUNK_ALIAS.
1914     In a FUNCTION_DECL for which DECL_THUNK_P does not hold,
1915     VAR_DECL, TYPE_DECL, or TEMPLATE_DECL, this is
1916     DECL_TEMPLATE_INFO.  */
1917  tree template_info;
1918
1919  union lang_decl_u2 {
1920    /* In a FUNCTION_DECL for which DECL_THUNK_P holds, this is
1921       THUNK_VIRTUAL_OFFSET.
1922       Otherwise this is DECL_ACCESS.  */
1923    tree GTY ((tag ("0"))) access;
1924
1925    /* For VAR_DECL in function, this is DECL_DISCRIMINATOR.  */
1926    int GTY ((tag ("1"))) discriminator;
1927  } GTY ((desc ("%0.u.base.u2sel"))) u2;
1928};
1929
1930/* Additional DECL_LANG_SPECIFIC information for functions.  */
1931
1932struct GTY(()) lang_decl_fn {
1933  struct lang_decl_min min;
1934
1935  /* In an overloaded operator, this is the value of
1936     DECL_OVERLOADED_OPERATOR_P.  */
1937  ENUM_BITFIELD (tree_code) operator_code : 16;
1938
1939  unsigned global_ctor_p : 1;
1940  unsigned global_dtor_p : 1;
1941  unsigned constructor_attr : 1;
1942  unsigned destructor_attr : 1;
1943  unsigned assignment_operator_p : 1;
1944  unsigned static_function : 1;
1945  unsigned pure_virtual : 1;
1946  unsigned defaulted_p : 1;
1947
1948  unsigned has_in_charge_parm_p : 1;
1949  unsigned has_vtt_parm_p : 1;
1950  unsigned pending_inline_p : 1;
1951  unsigned nonconverting : 1;
1952  unsigned thunk_p : 1;
1953  unsigned this_thunk_p : 1;
1954  unsigned hidden_friend_p : 1;
1955  /* 1 spare bit.  */
1956
1957  /* For a non-thunk function decl, this is a tree list of
1958     friendly classes. For a thunk function decl, it is the
1959     thunked to function decl.  */
1960  tree befriending_classes;
1961
1962  /* For a non-virtual FUNCTION_DECL, this is
1963     DECL_FRIEND_CONTEXT.  For a virtual FUNCTION_DECL for which
1964     DECL_THIS_THUNK_P does not hold, this is DECL_THUNKS. Both
1965     this pointer and result pointer adjusting thunks are
1966     chained here.  This pointer thunks to return pointer thunks
1967     will be chained on the return pointer thunk.  */
1968  tree context;
1969
1970  union lang_decl_u5
1971  {
1972    /* In a non-thunk FUNCTION_DECL or TEMPLATE_DECL, this is
1973       DECL_CLONED_FUNCTION.  */
1974    tree GTY ((tag ("0"))) cloned_function;
1975
1976    /* In a FUNCTION_DECL for which THUNK_P holds this is the
1977       THUNK_FIXED_OFFSET.  */
1978    HOST_WIDE_INT GTY ((tag ("1"))) fixed_offset;
1979  } GTY ((desc ("%1.thunk_p"))) u5;
1980
1981  union lang_decl_u3
1982  {
1983    struct cp_token_cache * GTY ((tag ("1"))) pending_inline_info;
1984    struct language_function * GTY ((tag ("0")))
1985      saved_language_function;
1986  } GTY ((desc ("%1.pending_inline_p"))) u;
1987
1988};
1989
1990/* DECL_LANG_SPECIFIC for namespaces.  */
1991
1992struct GTY(()) lang_decl_ns {
1993  struct lang_decl_base base;
1994  cp_binding_level *level;
1995};
1996
1997/* DECL_LANG_SPECIFIC for parameters.  */
1998
1999struct GTY(()) lang_decl_parm {
2000  struct lang_decl_base base;
2001  int level;
2002  int index;
2003};
2004
2005/* DECL_LANG_SPECIFIC for all types.  It would be nice to just make this a
2006   union rather than a struct containing a union as its only field, but
2007   tree.h declares it as a struct.  */
2008
2009struct GTY((variable_size)) lang_decl {
2010  union GTY((desc ("%h.base.selector"))) lang_decl_u {
2011    struct lang_decl_base GTY ((default)) base;
2012    struct lang_decl_min GTY((tag ("0"))) min;
2013    struct lang_decl_fn GTY ((tag ("1"))) fn;
2014    struct lang_decl_ns GTY((tag ("2"))) ns;
2015    struct lang_decl_parm GTY((tag ("3"))) parm;
2016  } u;
2017};
2018
2019/* Looks through a template (if present) to find what it declares.  */
2020#define STRIP_TEMPLATE(NODE) \
2021  (TREE_CODE (NODE) == TEMPLATE_DECL ? DECL_TEMPLATE_RESULT (NODE) : NODE)
2022
2023#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
2024
2025#define LANG_DECL_MIN_CHECK(NODE) __extension__                 \
2026({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE);            \
2027   if (!LANG_DECL_HAS_MIN (NODE))                               \
2028     lang_check_failed (__FILE__, __LINE__, __FUNCTION__);      \
2029   &lt->u.min; })
2030
2031/* We want to be able to check DECL_CONSTRUCTOR_P and such on a function
2032   template, not just on a FUNCTION_DECL.  So when looking for things in
2033   lang_decl_fn, look down through a TEMPLATE_DECL into its result.  */
2034#define LANG_DECL_FN_CHECK(NODE) __extension__                          \
2035({ struct lang_decl *lt = DECL_LANG_SPECIFIC (STRIP_TEMPLATE (NODE));   \
2036   if (!DECL_DECLARES_FUNCTION_P (NODE) || lt->u.base.selector != 1)    \
2037     lang_check_failed (__FILE__, __LINE__, __FUNCTION__);              \
2038   &lt->u.fn; })
2039
2040#define LANG_DECL_NS_CHECK(NODE) __extension__                          \
2041({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE);                    \
2042   if (TREE_CODE (NODE) != NAMESPACE_DECL || lt->u.base.selector != 2)  \
2043     lang_check_failed (__FILE__, __LINE__, __FUNCTION__);              \
2044   &lt->u.ns; })
2045
2046#define LANG_DECL_PARM_CHECK(NODE) __extension__                \
2047({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE);            \
2048  if (TREE_CODE (NODE) != PARM_DECL)                            \
2049    lang_check_failed (__FILE__, __LINE__, __FUNCTION__);       \
2050  &lt->u.parm; })
2051
2052#define LANG_DECL_U2_CHECK(NODE, TF) __extension__              \
2053({  struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE);           \
2054    if (!LANG_DECL_HAS_MIN (NODE) || lt->u.base.u2sel != TF)    \
2055      lang_check_failed (__FILE__, __LINE__, __FUNCTION__);     \
2056    &lt->u.min.u2; })
2057
2058#else
2059
2060#define LANG_DECL_MIN_CHECK(NODE) \
2061  (&DECL_LANG_SPECIFIC (NODE)->u.min)
2062
2063#define LANG_DECL_FN_CHECK(NODE) \
2064  (&DECL_LANG_SPECIFIC (STRIP_TEMPLATE (NODE))->u.fn)
2065
2066#define LANG_DECL_NS_CHECK(NODE) \
2067  (&DECL_LANG_SPECIFIC (NODE)->u.ns)
2068
2069#define LANG_DECL_PARM_CHECK(NODE) \
2070  (&DECL_LANG_SPECIFIC (NODE)->u.parm)
2071
2072#define LANG_DECL_U2_CHECK(NODE, TF) \
2073  (&DECL_LANG_SPECIFIC (NODE)->u.min.u2)
2074
2075#endif /* ENABLE_TREE_CHECKING */
2076
2077/* For a FUNCTION_DECL or a VAR_DECL, the language linkage for the
2078   declaration.  Some entities (like a member function in a local
2079   class, or a local variable) do not have linkage at all, and this
2080   macro should not be used in those cases.
2081
2082   Implementation note: A FUNCTION_DECL without DECL_LANG_SPECIFIC was
2083   created by language-independent code, and has C linkage.  Most
2084   VAR_DECLs have C++ linkage, and do not have DECL_LANG_SPECIFIC, but
2085   we do create DECL_LANG_SPECIFIC for variables with non-C++ linkage.  */
2086#define DECL_LANGUAGE(NODE)                             \
2087  (DECL_LANG_SPECIFIC (NODE)                            \
2088   ? DECL_LANG_SPECIFIC (NODE)->u.base.language         \
2089   : (TREE_CODE (NODE) == FUNCTION_DECL                 \
2090      ? lang_c : lang_cplusplus))
2091
2092/* Set the language linkage for NODE to LANGUAGE.  */
2093#define SET_DECL_LANGUAGE(NODE, LANGUAGE) \
2094  (DECL_LANG_SPECIFIC (NODE)->u.base.language = (LANGUAGE))
2095
2096/* For FUNCTION_DECLs: nonzero means that this function is a constructor.  */
2097#define DECL_CONSTRUCTOR_P(NODE) \
2098  (LANG_DECL_FN_CHECK (NODE)->constructor_attr)
2099
2100/* Nonzero if NODE (a FUNCTION_DECL) is a constructor for a complete
2101   object.  */
2102#define DECL_COMPLETE_CONSTRUCTOR_P(NODE)               \
2103  (DECL_CONSTRUCTOR_P (NODE)                            \
2104   && DECL_NAME (NODE) == complete_ctor_identifier)
2105
2106/* Nonzero if NODE (a FUNCTION_DECL) is a constructor for a base
2107   object.  */
2108#define DECL_BASE_CONSTRUCTOR_P(NODE)           \
2109  (DECL_CONSTRUCTOR_P (NODE)                    \
2110   && DECL_NAME (NODE) == base_ctor_identifier)
2111
2112/* Nonzero if NODE (a FUNCTION_DECL) is a constructor, but not either the
2113   specialized in-charge constructor or the specialized not-in-charge
2114   constructor.  */
2115#define DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P(NODE)                \
2116  (DECL_DECLARES_FUNCTION_P (NODE) && DECL_CONSTRUCTOR_P (NODE) \
2117   && !DECL_CLONED_FUNCTION_P (NODE))
2118
2119/* Nonzero if NODE (a FUNCTION_DECL) is a copy constructor.  */
2120#define DECL_COPY_CONSTRUCTOR_P(NODE) \
2121  (DECL_CONSTRUCTOR_P (NODE) && copy_fn_p (NODE) > 0)
2122
2123/* Nonzero if NODE (a FUNCTION_DECL) is a move constructor.  */
2124#define DECL_MOVE_CONSTRUCTOR_P(NODE) \
2125  (DECL_CONSTRUCTOR_P (NODE) && move_fn_p (NODE))
2126
2127/* Nonzero if NODE is a destructor.  */
2128#define DECL_DESTRUCTOR_P(NODE)                         \
2129  (LANG_DECL_FN_CHECK (NODE)->destructor_attr)
2130
2131/* Nonzero if NODE (a FUNCTION_DECL) is a destructor, but not the
2132   specialized in-charge constructor, in-charge deleting constructor,
2133   or the base destructor.  */
2134#define DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P(NODE)                 \
2135  (DECL_DECLARES_FUNCTION_P (NODE) && DECL_DESTRUCTOR_P (NODE)  \
2136   && !DECL_CLONED_FUNCTION_P (NODE))
2137
2138/* Nonzero if NODE (a FUNCTION_DECL) is a destructor for a complete
2139   object.  */
2140#define DECL_COMPLETE_DESTRUCTOR_P(NODE)                \
2141  (DECL_DESTRUCTOR_P (NODE)                             \
2142   && DECL_NAME (NODE) == complete_dtor_identifier)
2143
2144/* Nonzero if NODE (a FUNCTION_DECL) is a destructor for a base
2145   object.  */
2146#define DECL_BASE_DESTRUCTOR_P(NODE)            \
2147  (DECL_DESTRUCTOR_P (NODE)                     \
2148   && DECL_NAME (NODE) == base_dtor_identifier)
2149
2150/* Nonzero if NODE (a FUNCTION_DECL) is a destructor for a complete
2151   object that deletes the object after it has been destroyed.  */
2152#define DECL_DELETING_DESTRUCTOR_P(NODE)                \
2153  (DECL_DESTRUCTOR_P (NODE)                             \
2154   && DECL_NAME (NODE) == deleting_dtor_identifier)
2155
2156/* Nonzero if NODE (a FUNCTION_DECL) is a cloned constructor or
2157   destructor.  */
2158#define DECL_CLONED_FUNCTION_P(NODE) (!!decl_cloned_function_p (NODE, true))
2159
2160/* If DECL_CLONED_FUNCTION_P holds, this is the function that was
2161   cloned.  */
2162#define DECL_CLONED_FUNCTION(NODE) (*decl_cloned_function_p (NODE, false))
2163
2164/* Perform an action for each clone of FN, if FN is a function with
2165   clones.  This macro should be used like:
2166
2167      FOR_EACH_CLONE (clone, fn)
2168        { ... }
2169
2170  */
2171#define FOR_EACH_CLONE(CLONE, FN)                       \
2172  if (TREE_CODE (FN) == FUNCTION_DECL                   \
2173      && (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (FN)       \
2174          || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (FN)))   \
2175     for (CLONE = DECL_CHAIN (FN);                      \
2176          CLONE && DECL_CLONED_FUNCTION_P (CLONE);      \
2177          CLONE = DECL_CHAIN (CLONE))
2178
2179/* Nonzero if NODE has DECL_DISCRIMINATOR and not DECL_ACCESS.  */
2180#define DECL_DISCRIMINATOR_P(NODE)      \
2181  (TREE_CODE (NODE) == VAR_DECL         \
2182   && DECL_FUNCTION_SCOPE_P (NODE))
2183
2184/* Discriminator for name mangling.  */
2185#define DECL_DISCRIMINATOR(NODE) (LANG_DECL_U2_CHECK (NODE, 1)->discriminator)
2186
2187/* True iff DECL_DISCRIMINATOR is set for a DECL_DISCRIMINATOR_P decl.  */
2188#define DECL_DISCRIMINATOR_SET_P(NODE) \
2189  (DECL_LANG_SPECIFIC (NODE) && DECL_LANG_SPECIFIC (NODE)->u.base.u2sel == 1)
2190
2191/* The index of a user-declared parameter in its function, starting at 1.
2192   All artificial parameters will have index 0.  */
2193#define DECL_PARM_INDEX(NODE) \
2194  (LANG_DECL_PARM_CHECK (NODE)->index)
2195
2196/* The level of a user-declared parameter in its function, starting at 1.
2197   A parameter of the function will have level 1; a parameter of the first
2198   nested function declarator (i.e. t in void f (void (*p)(T t))) will have
2199   level 2.  */
2200#define DECL_PARM_LEVEL(NODE) \
2201  (LANG_DECL_PARM_CHECK (NODE)->level)
2202
2203/* Nonzero if the VTT parm has been added to NODE.  */
2204#define DECL_HAS_VTT_PARM_P(NODE) \
2205  (LANG_DECL_FN_CHECK (NODE)->has_vtt_parm_p)
2206
2207/* Nonzero if NODE is a FUNCTION_DECL for which a VTT parameter is
2208   required.  */
2209#define DECL_NEEDS_VTT_PARM_P(NODE)                     \
2210  (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (NODE))         \
2211   && (DECL_BASE_CONSTRUCTOR_P (NODE)                   \
2212       || DECL_BASE_DESTRUCTOR_P (NODE)))
2213
2214/* Nonzero if NODE is a user-defined conversion operator.  */
2215#define DECL_CONV_FN_P(NODE) \
2216  (DECL_NAME (NODE) && IDENTIFIER_TYPENAME_P (DECL_NAME (NODE)))
2217
2218/* If FN is a conversion operator, the type to which it converts.
2219   Otherwise, NULL_TREE.  */
2220#define DECL_CONV_FN_TYPE(FN) \
2221  (DECL_CONV_FN_P (FN) ? TREE_TYPE (DECL_NAME (FN)) : NULL_TREE)
2222
2223/* Nonzero if NODE, which is a TEMPLATE_DECL, is a template
2224   conversion operator to a type dependent on the innermost template
2225   args.  */
2226#define DECL_TEMPLATE_CONV_FN_P(NODE) \
2227  (DECL_LANG_SPECIFIC (TEMPLATE_DECL_CHECK (NODE))->u.base.template_conv_p)
2228
2229/* Nonzero if NODE, a static data member, was declared in its class as an
2230   array of unknown bound.  */
2231#define VAR_HAD_UNKNOWN_BOUND(NODE)                     \
2232  (DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))           \
2233   ? DECL_LANG_SPECIFIC (NODE)->u.base.template_conv_p  \
2234   : false)
2235#define SET_VAR_HAD_UNKNOWN_BOUND(NODE) \
2236  (DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))->u.base.template_conv_p = true)
2237
2238/* Set the overloaded operator code for NODE to CODE.  */
2239#define SET_OVERLOADED_OPERATOR_CODE(NODE, CODE) \
2240  (LANG_DECL_FN_CHECK (NODE)->operator_code = (CODE))
2241
2242/* If NODE is an overloaded operator, then this returns the TREE_CODE
2243   associated with the overloaded operator.
2244   DECL_ASSIGNMENT_OPERATOR_P must also be checked to determine
2245   whether or not NODE is an assignment operator.  If NODE is not an
2246   overloaded operator, ERROR_MARK is returned.  Since the numerical
2247   value of ERROR_MARK is zero, this macro can be used as a predicate
2248   to test whether or not NODE is an overloaded operator.  */
2249#define DECL_OVERLOADED_OPERATOR_P(NODE)                \
2250  (IDENTIFIER_OPNAME_P (DECL_NAME (NODE))               \
2251   ? LANG_DECL_FN_CHECK (NODE)->operator_code : ERROR_MARK)
2252
2253/* Nonzero if NODE is an assignment operator (including += and such).  */
2254#define DECL_ASSIGNMENT_OPERATOR_P(NODE) \
2255  (LANG_DECL_FN_CHECK (NODE)->assignment_operator_p)
2256
2257/* For FUNCTION_DECLs: nonzero means that this function is a
2258   constructor or a destructor with an extra in-charge parameter to
2259   control whether or not virtual bases are constructed.  */
2260#define DECL_HAS_IN_CHARGE_PARM_P(NODE) \
2261  (LANG_DECL_FN_CHECK (NODE)->has_in_charge_parm_p)
2262
2263/* Nonzero if DECL is a declaration of __builtin_constant_p.  */
2264#define DECL_IS_BUILTIN_CONSTANT_P(NODE)                \
2265 (TREE_CODE (NODE) == FUNCTION_DECL                     \
2266  && DECL_BUILT_IN_CLASS (NODE) == BUILT_IN_NORMAL      \
2267  && DECL_FUNCTION_CODE (NODE) == BUILT_IN_CONSTANT_P)
2268
2269/* Nonzero for _DECL means that this decl appears in (or will appear
2270   in) as a member in a RECORD_TYPE or UNION_TYPE node.  It is also for
2271   detecting circularity in case members are multiply defined.  In the
2272   case of a VAR_DECL, it is also used to determine how program storage
2273   should be allocated.  */
2274#define DECL_IN_AGGR_P(NODE) (DECL_LANG_FLAG_3 (NODE))
2275
2276/* Nonzero for a VAR_DECL means that the variable's initialization (if
2277   any) has been processed.  (In general, DECL_INITIALIZED_P is
2278   !DECL_EXTERNAL, but static data members may be initialized even if
2279   not defined.)  */
2280#define DECL_INITIALIZED_P(NODE) \
2281   (TREE_LANG_FLAG_1 (VAR_DECL_CHECK (NODE)))
2282
2283/* Nonzero for a VAR_DECL iff an explicit initializer was provided
2284   or a non-trivial constructor is called.  */
2285#define DECL_NONTRIVIALLY_INITIALIZED_P(NODE)   \
2286   (TREE_LANG_FLAG_3 (VAR_DECL_CHECK (NODE)))
2287
2288/* Nonzero for a VAR_DECL that was initialized with a
2289   constant-expression.  */
2290#define DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P(NODE) \
2291  (TREE_LANG_FLAG_2 (VAR_DECL_CHECK (NODE)))
2292
2293/* Nonzero if the DECL was initialized in the class definition itself,
2294   rather than outside the class.  This is used for both static member
2295   VAR_DECLS, and FUNCTION_DECLS that are defined in the class.  */
2296#define DECL_INITIALIZED_IN_CLASS_P(DECL) \
2297  (DECL_LANG_SPECIFIC (VAR_OR_FUNCTION_DECL_CHECK (DECL)) \
2298   ->u.base.initialized_in_class)
2299
2300/* Nonzero if the DECL is used in the sense of 3.2 [basic.def.odr].
2301   Only available for decls with DECL_LANG_SPECIFIC.  */
2302#define DECL_ODR_USED(DECL) \
2303  (DECL_LANG_SPECIFIC (VAR_OR_FUNCTION_DECL_CHECK (DECL)) \
2304   ->u.base.odr_used)
2305
2306/* Nonzero for DECL means that this decl is just a friend declaration,
2307   and should not be added to the list of members for this class.  */
2308#define DECL_FRIEND_P(NODE) \
2309  (DECL_LANG_SPECIFIC (TYPE_FUNCTION_OR_TEMPLATE_DECL_CHECK (NODE)) \
2310   ->u.base.friend_attr)
2311
2312/* A TREE_LIST of the types which have befriended this FUNCTION_DECL.  */
2313#define DECL_BEFRIENDING_CLASSES(NODE) \
2314  (LANG_DECL_FN_CHECK (NODE)->befriending_classes)
2315
2316/* Nonzero for FUNCTION_DECL means that this decl is a static
2317   member function.  */
2318#define DECL_STATIC_FUNCTION_P(NODE) \
2319  (LANG_DECL_FN_CHECK (NODE)->static_function)
2320
2321/* Nonzero for FUNCTION_DECL means that this decl is a non-static
2322   member function.  */
2323#define DECL_NONSTATIC_MEMBER_FUNCTION_P(NODE) \
2324  (TREE_CODE (TREE_TYPE (NODE)) == METHOD_TYPE)
2325
2326/* Nonzero for FUNCTION_DECL means that this decl is a member function
2327   (static or non-static).  */
2328#define DECL_FUNCTION_MEMBER_P(NODE) \
2329  (DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE) || DECL_STATIC_FUNCTION_P (NODE))
2330
2331/* Nonzero for FUNCTION_DECL means that this member function
2332   has `this' as const X *const.  */
2333#define DECL_CONST_MEMFUNC_P(NODE)                                       \
2334  (DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE)                               \
2335   && CP_TYPE_CONST_P (TREE_TYPE (TREE_VALUE                             \
2336                                  (TYPE_ARG_TYPES (TREE_TYPE (NODE))))))
2337
2338/* Nonzero for FUNCTION_DECL means that this member function
2339   has `this' as volatile X *const.  */
2340#define DECL_VOLATILE_MEMFUNC_P(NODE)                                    \
2341  (DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE)                               \
2342   && CP_TYPE_VOLATILE_P (TREE_TYPE (TREE_VALUE                          \
2343                                  (TYPE_ARG_TYPES (TREE_TYPE (NODE))))))
2344
2345/* Nonzero for a DECL means that this member is a non-static member.  */
2346#define DECL_NONSTATIC_MEMBER_P(NODE)           \
2347  (DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE)      \
2348   || TREE_CODE (NODE) == FIELD_DECL)
2349
2350/* Nonzero for _DECL means that this member object type
2351   is mutable.  */
2352#define DECL_MUTABLE_P(NODE) (DECL_LANG_FLAG_0 (NODE))
2353
2354/* Nonzero for _DECL means that this constructor or conversion function is
2355   non-converting.  */
2356#define DECL_NONCONVERTING_P(NODE) \
2357  (LANG_DECL_FN_CHECK (NODE)->nonconverting)
2358
2359/* Nonzero for FUNCTION_DECL means that this member function is a pure
2360   virtual function.  */
2361#define DECL_PURE_VIRTUAL_P(NODE) \
2362  (LANG_DECL_FN_CHECK (NODE)->pure_virtual)
2363
2364/* True (in a FUNCTION_DECL) if NODE is a virtual function that is an
2365   invalid overrider for a function from a base class.  Once we have
2366   complained about an invalid overrider we avoid complaining about it
2367   again.  */
2368#define DECL_INVALID_OVERRIDER_P(NODE) \
2369  (DECL_LANG_FLAG_4 (NODE))
2370
2371/* True (in a FUNCTION_DECL) if NODE is a function declared with
2372   an override virt-specifier */
2373#define DECL_OVERRIDE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
2374
2375/* True (in a FUNCTION_DECL) if NODE is a function declared with
2376   a final virt-specifier */
2377#define DECL_FINAL_P(NODE) (TREE_LANG_FLAG_1 (NODE))
2378
2379/* The thunks associated with NODE, a FUNCTION_DECL.  */
2380#define DECL_THUNKS(NODE) \
2381  (DECL_VIRTUAL_P (NODE) ? LANG_DECL_FN_CHECK (NODE)->context : NULL_TREE)
2382
2383/* Set DECL_THUNKS.  */
2384#define SET_DECL_THUNKS(NODE,THUNKS) \
2385  (LANG_DECL_FN_CHECK (NODE)->context = (THUNKS))
2386
2387/* If NODE, a FUNCTION_DECL, is a C++11 inheriting constructor, then this
2388   is the base it inherits from.  */
2389#define DECL_INHERITED_CTOR_BASE(NODE) \
2390  (DECL_CONSTRUCTOR_P (NODE) ? LANG_DECL_FN_CHECK (NODE)->context : NULL_TREE)
2391
2392/* Set the inherited base.  */
2393#define SET_DECL_INHERITED_CTOR_BASE(NODE,INH) \
2394  (LANG_DECL_FN_CHECK (NODE)->context = (INH))
2395
2396/* Nonzero if NODE is a thunk, rather than an ordinary function.  */
2397#define DECL_THUNK_P(NODE)                      \
2398  (TREE_CODE (NODE) == FUNCTION_DECL            \
2399   && DECL_LANG_SPECIFIC (NODE)                 \
2400   && LANG_DECL_FN_CHECK (NODE)->thunk_p)
2401
2402/* Set DECL_THUNK_P for node.  */
2403#define SET_DECL_THUNK_P(NODE, THIS_ADJUSTING)                  \
2404  (LANG_DECL_FN_CHECK (NODE)->thunk_p = 1,                      \
2405   LANG_DECL_FN_CHECK (NODE)->this_thunk_p = (THIS_ADJUSTING))
2406
2407/* Nonzero if NODE is a this pointer adjusting thunk.  */
2408#define DECL_THIS_THUNK_P(NODE)                 \
2409  (DECL_THUNK_P (NODE) && LANG_DECL_FN_CHECK (NODE)->this_thunk_p)
2410
2411/* Nonzero if NODE is a result pointer adjusting thunk.  */
2412#define DECL_RESULT_THUNK_P(NODE)                       \
2413  (DECL_THUNK_P (NODE) && !LANG_DECL_FN_CHECK (NODE)->this_thunk_p)
2414
2415/* Nonzero if NODE is a FUNCTION_DECL, but not a thunk.  */
2416#define DECL_NON_THUNK_FUNCTION_P(NODE)                         \
2417  (TREE_CODE (NODE) == FUNCTION_DECL && !DECL_THUNK_P (NODE))
2418
2419/* Nonzero if NODE is `extern "C"'.  */
2420#define DECL_EXTERN_C_P(NODE) \
2421  (DECL_LANGUAGE (NODE) == lang_c)
2422
2423/* Nonzero if NODE is an `extern "C"' function.  */
2424#define DECL_EXTERN_C_FUNCTION_P(NODE) \
2425  (DECL_NON_THUNK_FUNCTION_P (NODE) && DECL_EXTERN_C_P (NODE))
2426
2427/* True iff DECL is an entity with vague linkage whose definition is
2428   available in this translation unit.  */
2429#define DECL_REPO_AVAILABLE_P(NODE) \
2430  (DECL_LANG_SPECIFIC (NODE)->u.base.repo_available_p)
2431
2432/* True if DECL is declared 'constexpr'.  */
2433#define DECL_DECLARED_CONSTEXPR_P(DECL) \
2434  DECL_LANG_FLAG_8 (VAR_OR_FUNCTION_DECL_CHECK (STRIP_TEMPLATE (DECL)))
2435
2436/* Nonzero if this DECL is the __PRETTY_FUNCTION__ variable in a
2437   template function.  */
2438#define DECL_PRETTY_FUNCTION_P(NODE) \
2439  (DECL_NAME (NODE) \
2440   && !strcmp (IDENTIFIER_POINTER (DECL_NAME (NODE)), "__PRETTY_FUNCTION__"))
2441
2442/* Nonzero if the thread-local variable was declared with __thread
2443   as opposed to thread_local.  */
2444#define DECL_GNU_TLS_P(NODE) \
2445  (TREE_LANG_FLAG_0 (VAR_DECL_CHECK (NODE)))
2446
2447/* The _TYPE context in which this _DECL appears.  This field holds the
2448   class where a virtual function instance is actually defined.  */
2449#define DECL_CLASS_CONTEXT(NODE) \
2450  (DECL_CLASS_SCOPE_P (NODE) ? DECL_CONTEXT (NODE) : NULL_TREE)
2451
2452/* For a non-member friend function, the class (if any) in which this
2453   friend was defined.  For example, given:
2454
2455     struct S { friend void f (); };
2456
2457   the DECL_FRIEND_CONTEXT for `f' will be `S'.  */
2458#define DECL_FRIEND_CONTEXT(NODE)                               \
2459  ((DECL_DECLARES_FUNCTION_P (NODE)                             \
2460    && DECL_FRIEND_P (NODE) && !DECL_FUNCTION_MEMBER_P (NODE))  \
2461   ? LANG_DECL_FN_CHECK (NODE)->context                         \
2462   : NULL_TREE)
2463
2464/* Set the DECL_FRIEND_CONTEXT for NODE to CONTEXT.  */
2465#define SET_DECL_FRIEND_CONTEXT(NODE, CONTEXT) \
2466  (LANG_DECL_FN_CHECK (NODE)->context = (CONTEXT))
2467
2468#define CP_DECL_CONTEXT(NODE) \
2469  (!DECL_FILE_SCOPE_P (NODE) ? DECL_CONTEXT (NODE) : global_namespace)
2470#define CP_TYPE_CONTEXT(NODE) \
2471  (!TYPE_FILE_SCOPE_P (NODE) ? TYPE_CONTEXT (NODE) : global_namespace)
2472#define FROB_CONTEXT(NODE) \
2473  ((NODE) == global_namespace ? DECL_CONTEXT (NODE) : (NODE))
2474
2475/* 1 iff NODE has namespace scope, including the global namespace.  */
2476#define DECL_NAMESPACE_SCOPE_P(NODE)                            \
2477  (!DECL_TEMPLATE_PARM_P (NODE)                                 \
2478   && TREE_CODE (CP_DECL_CONTEXT (NODE)) == NAMESPACE_DECL)
2479
2480#define TYPE_NAMESPACE_SCOPE_P(NODE) \
2481  (TREE_CODE (CP_TYPE_CONTEXT (NODE)) == NAMESPACE_DECL)
2482
2483#define NAMESPACE_SCOPE_P(NODE) \
2484  ((DECL_P (NODE) && DECL_NAMESPACE_SCOPE_P (NODE)) \
2485   || (TYPE_P (NODE) && TYPE_NAMESPACE_SCOPE_P (NODE)))
2486
2487/* 1 iff NODE is a class member.  */
2488#define DECL_CLASS_SCOPE_P(NODE) \
2489  (DECL_CONTEXT (NODE) && TYPE_P (DECL_CONTEXT (NODE)))
2490
2491#define TYPE_CLASS_SCOPE_P(NODE) \
2492  (TYPE_CONTEXT (NODE) && TYPE_P (TYPE_CONTEXT (NODE)))
2493
2494/* 1 iff NODE is function-local.  */
2495#define DECL_FUNCTION_SCOPE_P(NODE) \
2496  (DECL_CONTEXT (NODE) \
2497   && TREE_CODE (DECL_CONTEXT (NODE)) == FUNCTION_DECL)
2498
2499#define TYPE_FUNCTION_SCOPE_P(NODE) \
2500  (TYPE_CONTEXT (NODE) && TREE_CODE (TYPE_CONTEXT (NODE)) == FUNCTION_DECL)
2501
2502/* 1 iff VAR_DECL node NODE is a type-info decl.  This flag is set for
2503   both the primary typeinfo object and the associated NTBS name.  */
2504#define DECL_TINFO_P(NODE) TREE_LANG_FLAG_4 (VAR_DECL_CHECK (NODE))
2505
2506/* 1 iff VAR_DECL node NODE is virtual table or VTT.  */
2507#define DECL_VTABLE_OR_VTT_P(NODE) TREE_LANG_FLAG_5 (VAR_DECL_CHECK (NODE))
2508
2509/* 1 iff FUNCTION_TYPE or METHOD_TYPE has a ref-qualifier (either & or &&). */
2510#define FUNCTION_REF_QUALIFIED(NODE) \
2511  TREE_LANG_FLAG_4 (FUNC_OR_METHOD_CHECK (NODE))
2512
2513/* 1 iff FUNCTION_TYPE or METHOD_TYPE has &&-ref-qualifier.  */
2514#define FUNCTION_RVALUE_QUALIFIED(NODE) \
2515  TREE_LANG_FLAG_5 (FUNC_OR_METHOD_CHECK (NODE))
2516
2517/* Returns 1 iff VAR_DECL is a construction virtual table.
2518   DECL_VTABLE_OR_VTT_P will be true in this case and must be checked
2519   before using this macro.  */
2520#define DECL_CONSTRUCTION_VTABLE_P(NODE) \
2521  TREE_LANG_FLAG_6 (VAR_DECL_CHECK (NODE))
2522
2523/* 1 iff NODE is function-local, but for types.  */
2524#define LOCAL_CLASS_P(NODE)                             \
2525  (decl_function_context (TYPE_MAIN_DECL (NODE)) != NULL_TREE)
2526
2527/* For a NAMESPACE_DECL: the list of using namespace directives
2528   The PURPOSE is the used namespace, the value is the namespace
2529   that is the common ancestor.  */
2530#define DECL_NAMESPACE_USING(NODE) DECL_VINDEX (NAMESPACE_DECL_CHECK (NODE))
2531
2532/* In a NAMESPACE_DECL, the DECL_INITIAL is used to record all users
2533   of a namespace, to record the transitive closure of using namespace.  */
2534#define DECL_NAMESPACE_USERS(NODE) DECL_INITIAL (NAMESPACE_DECL_CHECK (NODE))
2535
2536/* In a NAMESPACE_DECL, the list of namespaces which have associated
2537   themselves with this one.  */
2538#define DECL_NAMESPACE_ASSOCIATIONS(NODE) \
2539  (NAMESPACE_DECL_CHECK (NODE)->decl_non_common.saved_tree)
2540
2541/* In a NAMESPACE_DECL, points to the original namespace if this is
2542   a namespace alias.  */
2543#define DECL_NAMESPACE_ALIAS(NODE) \
2544        DECL_ABSTRACT_ORIGIN (NAMESPACE_DECL_CHECK (NODE))
2545#define ORIGINAL_NAMESPACE(NODE)  \
2546  (DECL_NAMESPACE_ALIAS (NODE) ? DECL_NAMESPACE_ALIAS (NODE) : (NODE))
2547
2548/* Nonzero if NODE is the std namespace.  */
2549#define DECL_NAMESPACE_STD_P(NODE)                      \
2550  (TREE_CODE (NODE) == NAMESPACE_DECL                   \
2551   && CP_DECL_CONTEXT (NODE) == global_namespace        \
2552   && DECL_NAME (NODE) == std_identifier)
2553
2554/* In a TREE_LIST concatenating using directives, indicate indirect
2555   directives  */
2556#define TREE_INDIRECT_USING(NODE) TREE_LANG_FLAG_0 (TREE_LIST_CHECK (NODE))
2557
2558/* In a TREE_LIST in an attribute list, indicates that the attribute
2559   must be applied at instantiation time.  */
2560#define ATTR_IS_DEPENDENT(NODE) TREE_LANG_FLAG_0 (TREE_LIST_CHECK (NODE))
2561
2562extern tree decl_shadowed_for_var_lookup (tree);
2563extern void decl_shadowed_for_var_insert (tree, tree);
2564
2565/* Non zero if this is a using decl for a dependent scope. */
2566#define DECL_DEPENDENT_P(NODE) DECL_LANG_FLAG_0 (USING_DECL_CHECK (NODE))
2567
2568/* The scope named in a using decl.  */
2569#define USING_DECL_SCOPE(NODE) TREE_TYPE (USING_DECL_CHECK (NODE))
2570
2571/* The decls named by a using decl.  */
2572#define USING_DECL_DECLS(NODE) DECL_INITIAL (USING_DECL_CHECK (NODE))
2573
2574/* Non zero if the using decl refers to a dependent type.  */
2575#define USING_DECL_TYPENAME_P(NODE) DECL_LANG_FLAG_1 (USING_DECL_CHECK (NODE))
2576
2577/* In a VAR_DECL, true if we have a shadowed local variable
2578   in the shadowed var table for this VAR_DECL.  */
2579#define DECL_HAS_SHADOWED_FOR_VAR_P(NODE) \
2580  (VAR_DECL_CHECK (NODE)->decl_with_vis.shadowed_for_var_p)
2581
2582/* In a VAR_DECL for a variable declared in a for statement,
2583   this is the shadowed (local) variable.  */
2584#define DECL_SHADOWED_FOR_VAR(NODE) \
2585  (DECL_HAS_SHADOWED_FOR_VAR_P(NODE) ? decl_shadowed_for_var_lookup (NODE) : NULL)
2586
2587#define SET_DECL_SHADOWED_FOR_VAR(NODE, VAL) \
2588  (decl_shadowed_for_var_insert (NODE, VAL))
2589
2590/* In a FUNCTION_DECL, this is nonzero if this function was defined in
2591   the class definition.  We have saved away the text of the function,
2592   but have not yet processed it.  */
2593#define DECL_PENDING_INLINE_P(NODE) \
2594  (LANG_DECL_FN_CHECK (NODE)->pending_inline_p)
2595
2596/* If DECL_PENDING_INLINE_P holds, this is the saved text of the
2597   function.  */
2598#define DECL_PENDING_INLINE_INFO(NODE) \
2599  (LANG_DECL_FN_CHECK (NODE)->u.pending_inline_info)
2600
2601/* Nonzero for TYPE_DECL means that it was written 'using name = type'.  */
2602#define TYPE_DECL_ALIAS_P(NODE) \
2603  DECL_LANG_FLAG_6 (TYPE_DECL_CHECK (NODE))
2604
2605/* Nonzero for a type which is an alias for another type; i.e, a type
2606   which declaration was written 'using name-of-type =
2607   another-type'.  */
2608#define TYPE_ALIAS_P(NODE)                      \
2609  (TYPE_P (NODE)                                \
2610   && TYPE_NAME (NODE)                          \
2611   && TREE_CODE (TYPE_NAME (NODE)) == TYPE_DECL \
2612   && TYPE_DECL_ALIAS_P (TYPE_NAME (NODE)))
2613
2614/* For a class type: if this structure has many fields, we'll sort them
2615   and put them into a TREE_VEC.  */
2616#define CLASSTYPE_SORTED_FIELDS(NODE) \
2617  (LANG_TYPE_CLASS_CHECK (NODE)->sorted_fields)
2618
2619/* If non-NULL for a VAR_DECL, FUNCTION_DECL, TYPE_DECL or
2620   TEMPLATE_DECL, the entity is either a template specialization (if
2621   DECL_USE_TEMPLATE is nonzero) or the abstract instance of the
2622   template itself.
2623
2624   In either case, DECL_TEMPLATE_INFO is a TREE_LIST, whose
2625   TREE_PURPOSE is the TEMPLATE_DECL of which this entity is a
2626   specialization or abstract instance.  The TREE_VALUE is the
2627   template arguments used to specialize the template.
2628   
2629   Consider:
2630
2631      template <typename T> struct S { friend void f(T) {} };
2632
2633   In this case, S<int>::f is, from the point of view of the compiler,
2634   an instantiation of a template -- but, from the point of view of
2635   the language, each instantiation of S results in a wholly unrelated
2636   global function f.  In this case, DECL_TEMPLATE_INFO for S<int>::f
2637   will be non-NULL, but DECL_USE_TEMPLATE will be zero.  */
2638#define DECL_TEMPLATE_INFO(NODE) \
2639  (DECL_LANG_SPECIFIC (VAR_TEMPL_TYPE_FIELD_OR_FUNCTION_DECL_CHECK (NODE)) \
2640   ->u.min.template_info)
2641
2642/* For a VAR_DECL, indicates that the variable is actually a
2643   non-static data member of anonymous union that has been promoted to
2644   variable status.  */
2645#define DECL_ANON_UNION_VAR_P(NODE) \
2646  (DECL_LANG_FLAG_4 (VAR_DECL_CHECK (NODE)))
2647
2648/* Template information for a RECORD_TYPE or UNION_TYPE.  */
2649#define CLASSTYPE_TEMPLATE_INFO(NODE) \
2650  (LANG_TYPE_CLASS_CHECK (RECORD_OR_UNION_CHECK (NODE))->template_info)
2651
2652/* Template information for an ENUMERAL_TYPE.  Although an enumeration may
2653   not be a primary template, it may be declared within the scope of a
2654   primary template and the enumeration constants may depend on
2655   non-type template parameters.  */
2656#define ENUM_TEMPLATE_INFO(NODE) \
2657  (TYPE_LANG_SLOT_1 (ENUMERAL_TYPE_CHECK (NODE)))
2658
2659/* Template information for a template template parameter.  */
2660#define TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO(NODE) \
2661  (LANG_TYPE_CLASS_CHECK (BOUND_TEMPLATE_TEMPLATE_PARM_TYPE_CHECK (NODE)) \
2662   ->template_info)
2663
2664/* Template information for an ENUMERAL_, RECORD_, UNION_TYPE, or
2665   BOUND_TEMPLATE_TEMPLATE_PARM type.  Note that if NODE is a
2666   specialization of an alias template, this accessor returns the
2667   template info for the alias template, not the one (if any) for the
2668   template of the underlying type.  */
2669#define TYPE_TEMPLATE_INFO(NODE)                                        \
2670  ((TYPE_ALIAS_P (NODE) && DECL_LANG_SPECIFIC (TYPE_NAME (NODE)))       \
2671   ? (DECL_LANG_SPECIFIC (TYPE_NAME (NODE))                             \
2672      ? DECL_TEMPLATE_INFO (TYPE_NAME (NODE))                           \
2673      : NULL_TREE)                                                      \
2674   : ((TREE_CODE (NODE) == ENUMERAL_TYPE)                               \
2675      ? ENUM_TEMPLATE_INFO (NODE)                                       \
2676      : ((TREE_CODE (NODE) == BOUND_TEMPLATE_TEMPLATE_PARM)             \
2677         ? TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (NODE)                  \
2678         : (CLASS_TYPE_P (NODE)                                         \
2679            ? CLASSTYPE_TEMPLATE_INFO (NODE)                            \
2680            : NULL_TREE))))
2681
2682
2683/* Set the template information for an ENUMERAL_, RECORD_, or
2684   UNION_TYPE to VAL.  */
2685#define SET_TYPE_TEMPLATE_INFO(NODE, VAL)                               \
2686  (TREE_CODE (NODE) == ENUMERAL_TYPE                                    \
2687   ? (ENUM_TEMPLATE_INFO (NODE) = (VAL))                                \
2688   : ((CLASS_TYPE_P (NODE) && !TYPE_ALIAS_P (NODE))                     \
2689      ? (CLASSTYPE_TEMPLATE_INFO (NODE) = (VAL))                        \
2690      : (DECL_TEMPLATE_INFO (TYPE_NAME (NODE)) = (VAL))))
2691
2692#define TI_TEMPLATE(NODE) TREE_TYPE (TEMPLATE_INFO_CHECK (NODE))
2693#define TI_ARGS(NODE) TREE_CHAIN (TEMPLATE_INFO_CHECK (NODE))
2694#define TI_PENDING_TEMPLATE_FLAG(NODE) TREE_LANG_FLAG_1 (NODE)
2695/* For a given TREE_VEC containing a template argument list,
2696   this property contains the number of arguments that are not
2697   defaulted.  */
2698#define NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) TREE_CHAIN (TREE_VEC_CHECK (NODE))
2699/* Below are the setter and getter of the NON_DEFAULT_TEMPLATE_ARGS_COUNT
2700   property.  */
2701#define SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE, INT_VALUE) \
2702  NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) = build_int_cst (NULL_TREE, INT_VALUE)
2703#ifdef ENABLE_CHECKING
2704#define GET_NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) \
2705    int_cst_value (NON_DEFAULT_TEMPLATE_ARGS_COUNT (NODE))
2706#else
2707#define GET_NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) \
2708  NON_DEFAULT_TEMPLATE_ARGS_COUNT (NODE) \
2709  ? int_cst_value (NON_DEFAULT_TEMPLATE_ARGS_COUNT (NODE)) \
2710  : TREE_VEC_LENGTH (INNERMOST_TEMPLATE_ARGS (NODE))
2711#endif
2712/* The list of typedefs - used in the template - that need
2713   access checking at template instantiation time.  */
2714#define TI_TYPEDEFS_NEEDING_ACCESS_CHECKING(NODE) \
2715  ((struct tree_template_info*)TEMPLATE_INFO_CHECK \
2716     (NODE))->typedefs_needing_access_checking
2717
2718/* We use TREE_VECs to hold template arguments.  If there is only one
2719   level of template arguments, then the TREE_VEC contains the
2720   arguments directly.  If there is more than one level of template
2721   arguments, then each entry in the TREE_VEC is itself a TREE_VEC,
2722   containing the template arguments for a single level.  The first
2723   entry in the outer TREE_VEC is the outermost level of template
2724   parameters; the last is the innermost.
2725
2726   It is incorrect to ever form a template argument vector containing
2727   only one level of arguments, but which is a TREE_VEC containing as
2728   its only entry the TREE_VEC for that level.
2729
2730   For each TREE_VEC containing the template arguments for a single
2731   level, it's possible to get or set the number of non defaulted
2732   template arguments by using the accessor macros
2733   GET_NON_DEFAULT_TEMPLATE_ARGS_COUNT or
2734   SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT.  */
2735
2736/* Nonzero if the template arguments is actually a vector of vectors,
2737   rather than just a vector.  */
2738#define TMPL_ARGS_HAVE_MULTIPLE_LEVELS(NODE)                 \
2739  (NODE && TREE_VEC_LENGTH (NODE) && TREE_VEC_ELT (NODE, 0)  \
2740   && TREE_CODE (TREE_VEC_ELT (NODE, 0)) == TREE_VEC)
2741
2742/* The depth of a template argument vector.  When called directly by
2743   the parser, we use a TREE_LIST rather than a TREE_VEC to represent
2744   template arguments.  In fact, we may even see NULL_TREE if there
2745   are no template arguments.  In both of those cases, there is only
2746   one level of template arguments.  */
2747#define TMPL_ARGS_DEPTH(NODE)                                   \
2748  (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (NODE) ? TREE_VEC_LENGTH (NODE) : 1)
2749
2750/* The LEVELth level of the template ARGS.  The outermost level of
2751   args is level 1, not level 0.  */
2752#define TMPL_ARGS_LEVEL(ARGS, LEVEL)            \
2753  (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (ARGS)        \
2754   ? TREE_VEC_ELT (ARGS, (LEVEL) - 1) : (ARGS))
2755
2756/* Set the LEVELth level of the template ARGS to VAL.  This macro does
2757   not work with single-level argument vectors.  */
2758#define SET_TMPL_ARGS_LEVEL(ARGS, LEVEL, VAL)   \
2759  (TREE_VEC_ELT (ARGS, (LEVEL) - 1) = (VAL))
2760
2761/* Accesses the IDXth parameter in the LEVELth level of the ARGS.  */
2762#define TMPL_ARG(ARGS, LEVEL, IDX)                              \
2763  (TREE_VEC_ELT (TMPL_ARGS_LEVEL (ARGS, LEVEL), IDX))
2764
2765/* Given a single level of template arguments in NODE, return the
2766   number of arguments.  */
2767#define NUM_TMPL_ARGS(NODE)                             \
2768  (TREE_VEC_LENGTH (NODE))
2769
2770/* Returns the innermost level of template arguments in ARGS.  */
2771#define INNERMOST_TEMPLATE_ARGS(NODE) \
2772  (get_innermost_template_args ((NODE), 1))
2773
2774/* The number of levels of template parameters given by NODE.  */
2775#define TMPL_PARMS_DEPTH(NODE) \
2776  ((HOST_WIDE_INT) TREE_INT_CST_LOW (TREE_PURPOSE (NODE)))
2777
2778/* The TEMPLATE_DECL instantiated or specialized by NODE.  This
2779   TEMPLATE_DECL will be the immediate parent, not the most general
2780   template.  For example, in:
2781
2782      template <class T> struct S { template <class U> void f(U); }
2783
2784   the FUNCTION_DECL for S<int>::f<double> will have, as its
2785   DECL_TI_TEMPLATE, `template <class U> S<int>::f<U>'.
2786
2787   As a special case, for a member friend template of a template
2788   class, this value will not be a TEMPLATE_DECL, but rather an
2789   IDENTIFIER_NODE or OVERLOAD indicating the name of the template and
2790   any explicit template arguments provided.  For example, in:
2791
2792     template <class T> struct S { friend void f<int>(int, double); }
2793
2794   the DECL_TI_TEMPLATE will be an IDENTIFIER_NODE for `f' and the
2795   DECL_TI_ARGS will be {int}.
2796
2797   For a FIELD_DECL with a non-static data member initializer, this value
2798   is the FIELD_DECL it was instantiated from.  */
2799#define DECL_TI_TEMPLATE(NODE)      TI_TEMPLATE (DECL_TEMPLATE_INFO (NODE))
2800
2801/* The template arguments used to obtain this decl from the most
2802   general form of DECL_TI_TEMPLATE.  For the example given for
2803   DECL_TI_TEMPLATE, the DECL_TI_ARGS will be {int, double}.  These
2804   are always the full set of arguments required to instantiate this
2805   declaration from the most general template specialized here.  */
2806#define DECL_TI_ARGS(NODE)          TI_ARGS (DECL_TEMPLATE_INFO (NODE))
2807
2808/* The TEMPLATE_DECL associated with NODE, a class type.  Even if NODE
2809   will be generated from a partial specialization, the TEMPLATE_DECL
2810   referred to here will be the original template.  For example,
2811   given:
2812
2813      template <typename T> struct S {};
2814      template <typename T> struct S<T*> {};
2815     
2816   the CLASSTPYE_TI_TEMPLATE for S<int*> will be S, not the S<T*>.  */
2817#define CLASSTYPE_TI_TEMPLATE(NODE) TI_TEMPLATE (CLASSTYPE_TEMPLATE_INFO (NODE))
2818#define CLASSTYPE_TI_ARGS(NODE)     TI_ARGS (CLASSTYPE_TEMPLATE_INFO (NODE))
2819
2820/* For a template instantiation TYPE, returns the TYPE corresponding
2821   to the primary template.  Otherwise returns TYPE itself.  */
2822#define CLASSTYPE_PRIMARY_TEMPLATE_TYPE(TYPE)                           \
2823  ((CLASSTYPE_USE_TEMPLATE ((TYPE))                                     \
2824    && !CLASSTYPE_TEMPLATE_SPECIALIZATION ((TYPE)))                     \
2825   ? TREE_TYPE (DECL_TEMPLATE_RESULT (DECL_PRIMARY_TEMPLATE             \
2826                                      (CLASSTYPE_TI_TEMPLATE ((TYPE))))) \
2827   : (TYPE))
2828
2829/* Like CLASS_TI_TEMPLATE, but also works for ENUMERAL_TYPEs.  */
2830#define TYPE_TI_TEMPLATE(NODE)                  \
2831  (TI_TEMPLATE (TYPE_TEMPLATE_INFO (NODE)))
2832
2833/* Like DECL_TI_ARGS, but for an ENUMERAL_, RECORD_, or UNION_TYPE.  */
2834#define TYPE_TI_ARGS(NODE)                      \
2835  (TI_ARGS (TYPE_TEMPLATE_INFO (NODE)))
2836
2837#define INNERMOST_TEMPLATE_PARMS(NODE)  TREE_VALUE (NODE)
2838
2839/* Nonzero if NODE (a TEMPLATE_DECL) is a member template, in the
2840   sense of [temp.mem].  */
2841#define DECL_MEMBER_TEMPLATE_P(NODE) \
2842  (DECL_LANG_FLAG_1 (TEMPLATE_DECL_CHECK (NODE)))
2843
2844/* Nonzero if the NODE corresponds to the template parameters for a
2845   member template, whose inline definition is being processed after
2846   the class definition is complete.  */
2847#define TEMPLATE_PARMS_FOR_INLINE(NODE) TREE_LANG_FLAG_1 (NODE)
2848
2849/* Determine if a parameter (i.e., a PARM_DECL) is a function
2850   parameter pack.  */
2851#define FUNCTION_PARAMETER_PACK_P(NODE) \
2852  (DECL_LANG_FLAG_1 (PARM_DECL_CHECK (NODE)))
2853
2854/* Determines if NODE is an expansion of one or more parameter packs,
2855   e.g., a TYPE_PACK_EXPANSION or EXPR_PACK_EXPANSION.  */
2856#define PACK_EXPANSION_P(NODE)                 \
2857  (TREE_CODE (NODE) == TYPE_PACK_EXPANSION     \
2858   || TREE_CODE (NODE) == EXPR_PACK_EXPANSION)
2859
2860/* Extracts the type or expression pattern from a TYPE_PACK_EXPANSION or
2861   EXPR_PACK_EXPANSION.  */
2862#define PACK_EXPANSION_PATTERN(NODE)                            \
2863  (TREE_CODE (NODE) == TYPE_PACK_EXPANSION? TREE_TYPE (NODE)    \
2864   : TREE_OPERAND (NODE, 0))
2865
2866/* Sets the type or expression pattern for a TYPE_PACK_EXPANSION or
2867   EXPR_PACK_EXPANSION.  */
2868#define SET_PACK_EXPANSION_PATTERN(NODE,VALUE)  \
2869  if (TREE_CODE (NODE) == TYPE_PACK_EXPANSION)  \
2870    TREE_TYPE (NODE) = VALUE;                   \
2871  else                                          \
2872    TREE_OPERAND (NODE, 0) = VALUE
2873
2874/* The list of parameter packs used in the PACK_EXPANSION_* node. The
2875   TREE_VALUE of each TREE_LIST contains the parameter packs.  */
2876#define PACK_EXPANSION_PARAMETER_PACKS(NODE)            \
2877  *(TREE_CODE (NODE) == EXPR_PACK_EXPANSION             \
2878    ? &TREE_OPERAND (NODE, 1)                           \
2879    : &TYPE_MINVAL (TYPE_PACK_EXPANSION_CHECK (NODE)))
2880
2881/* Any additional template args to be applied when substituting into
2882   the pattern, set by tsubst_pack_expansion for partial instantiations.  */
2883#define PACK_EXPANSION_EXTRA_ARGS(NODE)         \
2884  *(TREE_CODE (NODE) == TYPE_PACK_EXPANSION     \
2885    ? &TYPE_MAXVAL (NODE)                       \
2886    : &TREE_OPERAND ((NODE), 2))
2887
2888/* True iff this pack expansion is within a function context.  */
2889#define PACK_EXPANSION_LOCAL_P(NODE) TREE_LANG_FLAG_0 (NODE)
2890
2891/* Determine if this is an argument pack.  */
2892#define ARGUMENT_PACK_P(NODE)                          \
2893  (TREE_CODE (NODE) == TYPE_ARGUMENT_PACK              \
2894   || TREE_CODE (NODE) == NONTYPE_ARGUMENT_PACK)
2895
2896/* The arguments stored in an argument pack. Arguments are stored in a
2897   TREE_VEC, which may have length zero.  */
2898#define ARGUMENT_PACK_ARGS(NODE)                               \
2899  (TREE_CODE (NODE) == TYPE_ARGUMENT_PACK? TREE_TYPE (NODE)    \
2900   : TREE_OPERAND (NODE, 0))
2901
2902/* Set the arguments stored in an argument pack. VALUE must be a
2903   TREE_VEC.  */
2904#define SET_ARGUMENT_PACK_ARGS(NODE,VALUE)     \
2905  if (TREE_CODE (NODE) == TYPE_ARGUMENT_PACK)  \
2906    TREE_TYPE (NODE) = VALUE;                           \
2907  else                                                  \
2908    TREE_OPERAND (NODE, 0) = VALUE
2909
2910/* Whether the argument pack is "incomplete", meaning that more
2911   arguments can still be deduced. Incomplete argument packs are only
2912   used when the user has provided an explicit template argument list
2913   for a variadic function template. Some of the explicit template
2914   arguments will be placed into the beginning of the argument pack,
2915   but additional arguments might still be deduced.  */
2916#define ARGUMENT_PACK_INCOMPLETE_P(NODE)        \
2917  TREE_ADDRESSABLE (ARGUMENT_PACK_ARGS (NODE))
2918
2919/* When ARGUMENT_PACK_INCOMPLETE_P, stores the explicit template
2920   arguments used to fill this pack.  */
2921#define ARGUMENT_PACK_EXPLICIT_ARGS(NODE)       \
2922  TREE_TYPE (ARGUMENT_PACK_ARGS (NODE))
2923
2924/* In an ARGUMENT_PACK_SELECT, the argument pack from which an
2925   argument will be selected.  */
2926#define ARGUMENT_PACK_SELECT_FROM_PACK(NODE)                            \
2927  (((struct tree_argument_pack_select *)ARGUMENT_PACK_SELECT_CHECK (NODE))->argument_pack)
2928
2929/* In an ARGUMENT_PACK_SELECT, the index of the argument we want to
2930   select.  */
2931#define ARGUMENT_PACK_SELECT_INDEX(NODE)                                \
2932  (((struct tree_argument_pack_select *)ARGUMENT_PACK_SELECT_CHECK (NODE))->index)
2933 
2934/* In an ARGUMENT_PACK_SELECT, the actual underlying argument that the
2935   ARGUMENT_PACK_SELECT represents. */
2936#define ARGUMENT_PACK_SELECT_ARG(NODE)                                  \
2937  TREE_VEC_ELT (ARGUMENT_PACK_ARGS (ARGUMENT_PACK_SELECT_FROM_PACK (NODE)), \
2938                ARGUMENT_PACK_SELECT_INDEX (NODE));
2939
2940/* In a FUNCTION_DECL, the saved language-specific per-function data.  */
2941#define DECL_SAVED_FUNCTION_DATA(NODE)                  \
2942  (LANG_DECL_FN_CHECK (FUNCTION_DECL_CHECK (NODE))      \
2943   ->u.saved_language_function)
2944
2945/* True if NODE is an implicit INDIRECT_EXPR from convert_from_reference.  */
2946#define REFERENCE_REF_P(NODE)                           \
2947  (TREE_CODE (NODE) == INDIRECT_REF                     \
2948   && TREE_TYPE (TREE_OPERAND (NODE, 0))                \
2949   && (TREE_CODE (TREE_TYPE (TREE_OPERAND ((NODE), 0))) \
2950       == REFERENCE_TYPE))
2951
2952#define NEW_EXPR_USE_GLOBAL(NODE) \
2953  TREE_LANG_FLAG_0 (NEW_EXPR_CHECK (NODE))
2954#define DELETE_EXPR_USE_GLOBAL(NODE) \
2955  TREE_LANG_FLAG_0 (DELETE_EXPR_CHECK (NODE))
2956#define DELETE_EXPR_USE_VEC(NODE) \
2957  TREE_LANG_FLAG_1 (DELETE_EXPR_CHECK (NODE))
2958
2959/* Indicates that this is a non-dependent COMPOUND_EXPR which will
2960   resolve to a function call.  */
2961#define COMPOUND_EXPR_OVERLOADED(NODE) \
2962  TREE_LANG_FLAG_0 (COMPOUND_EXPR_CHECK (NODE))
2963
2964/* In a CALL_EXPR appearing in a template, true if Koenig lookup
2965   should be performed at instantiation time.  */
2966#define KOENIG_LOOKUP_P(NODE) TREE_LANG_FLAG_0 (CALL_EXPR_CHECK (NODE))
2967
2968/* Indicates whether a string literal has been parenthesized. Such
2969   usages are disallowed in certain circumstances.  */
2970
2971#define PAREN_STRING_LITERAL_P(NODE) \
2972  TREE_LANG_FLAG_0 (STRING_CST_CHECK (NODE))
2973
2974/* Nonzero if this AGGR_INIT_EXPR provides for initialization via a
2975   constructor call, rather than an ordinary function call.  */
2976#define AGGR_INIT_VIA_CTOR_P(NODE) \
2977  TREE_LANG_FLAG_0 (AGGR_INIT_EXPR_CHECK (NODE))
2978
2979/* Nonzero if expanding this AGGR_INIT_EXPR should first zero-initialize
2980   the object.  */
2981#define AGGR_INIT_ZERO_FIRST(NODE) \
2982  TREE_LANG_FLAG_2 (AGGR_INIT_EXPR_CHECK (NODE))
2983
2984/* AGGR_INIT_EXPR accessors.  These are equivalent to the CALL_EXPR
2985   accessors, except for AGGR_INIT_EXPR_SLOT (which takes the place of
2986   CALL_EXPR_STATIC_CHAIN).  */
2987
2988#define AGGR_INIT_EXPR_FN(NODE) TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), 1)
2989#define AGGR_INIT_EXPR_SLOT(NODE) \
2990  TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), 2)
2991#define AGGR_INIT_EXPR_ARG(NODE, I) \
2992  TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), (I) + 3)
2993#define aggr_init_expr_nargs(NODE) (VL_EXP_OPERAND_LENGTH(NODE) - 3)
2994
2995/* AGGR_INIT_EXPR_ARGP returns a pointer to the argument vector for NODE.
2996   We can't use &AGGR_INIT_EXPR_ARG (NODE, 0) because that will complain if
2997   the argument count is zero when checking is enabled.  Instead, do
2998   the pointer arithmetic to advance past the 3 fixed operands in a
2999   AGGR_INIT_EXPR.  That produces a valid pointer to just past the end of
3000   the operand array, even if it's not valid to dereference it.  */
3001#define AGGR_INIT_EXPR_ARGP(NODE) \
3002  (&(TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), 0)) + 3)
3003
3004/* Abstract iterators for AGGR_INIT_EXPRs.  */
3005
3006/* Structure containing iterator state.  */
3007typedef struct aggr_init_expr_arg_iterator_d {
3008  tree t;       /* the aggr_init_expr */
3009  int n;        /* argument count */
3010  int i;        /* next argument index */
3011} aggr_init_expr_arg_iterator;
3012
3013/* Initialize the abstract argument list iterator object ITER with the
3014   arguments from AGGR_INIT_EXPR node EXP.  */
3015static inline void
3016init_aggr_init_expr_arg_iterator (tree exp,
3017                                       aggr_init_expr_arg_iterator *iter)
3018{
3019  iter->t = exp;
3020  iter->n = aggr_init_expr_nargs (exp);
3021  iter->i = 0;
3022}
3023
3024/* Return the next argument from abstract argument list iterator object ITER,
3025   and advance its state.  Return NULL_TREE if there are no more arguments.  */
3026static inline tree
3027next_aggr_init_expr_arg (aggr_init_expr_arg_iterator *iter)
3028{
3029  tree result;
3030  if (iter->i >= iter->n)
3031    return NULL_TREE;
3032  result = AGGR_INIT_EXPR_ARG (iter->t, iter->i);
3033  iter->i++;
3034  return result;
3035}
3036
3037/* Initialize the abstract argument list iterator object ITER, then advance
3038   past and return the first argument.  Useful in for expressions, e.g.
3039     for (arg = first_aggr_init_expr_arg (exp, &iter); arg;
3040          arg = next_aggr_init_expr_arg (&iter))   */
3041static inline tree
3042first_aggr_init_expr_arg (tree exp, aggr_init_expr_arg_iterator *iter)
3043{
3044  init_aggr_init_expr_arg_iterator (exp, iter);
3045  return next_aggr_init_expr_arg (iter);
3046}
3047
3048/* Test whether there are more arguments in abstract argument list iterator
3049   ITER, without changing its state.  */
3050static inline bool
3051more_aggr_init_expr_args_p (const aggr_init_expr_arg_iterator *iter)
3052{
3053  return (iter->i < iter->n);
3054}
3055
3056/* Iterate through each argument ARG of AGGR_INIT_EXPR CALL, using variable
3057   ITER (of type aggr_init_expr_arg_iterator) to hold the iteration state.  */
3058#define FOR_EACH_AGGR_INIT_EXPR_ARG(arg, iter, call)                    \
3059  for ((arg) = first_aggr_init_expr_arg ((call), &(iter)); (arg);       \
3060       (arg) = next_aggr_init_expr_arg (&(iter)))
3061
3062/* VEC_INIT_EXPR accessors.  */
3063#define VEC_INIT_EXPR_SLOT(NODE) TREE_OPERAND (VEC_INIT_EXPR_CHECK (NODE), 0)
3064#define VEC_INIT_EXPR_INIT(NODE) TREE_OPERAND (VEC_INIT_EXPR_CHECK (NODE), 1)
3065
3066/* Indicates that a VEC_INIT_EXPR is a potential constant expression.
3067   Only set when the current function is constexpr.  */
3068#define VEC_INIT_EXPR_IS_CONSTEXPR(NODE) \
3069  TREE_LANG_FLAG_0 (VEC_INIT_EXPR_CHECK (NODE))
3070
3071/* Indicates that a VEC_INIT_EXPR is expressing value-initialization.  */
3072#define VEC_INIT_EXPR_VALUE_INIT(NODE) \
3073  TREE_LANG_FLAG_1 (VEC_INIT_EXPR_CHECK (NODE))
3074
3075/* The condition under which this MUST_NOT_THROW_EXPR actually blocks
3076   exceptions.  NULL_TREE means 'true'.  */
3077#define MUST_NOT_THROW_COND(NODE) \
3078  TREE_OPERAND (MUST_NOT_THROW_EXPR_CHECK (NODE), 1)
3079
3080/* The TYPE_MAIN_DECL for a class template type is a TYPE_DECL, not a
3081   TEMPLATE_DECL.  This macro determines whether or not a given class
3082   type is really a template type, as opposed to an instantiation or
3083   specialization of one.  */
3084#define CLASSTYPE_IS_TEMPLATE(NODE)  \
3085  (CLASSTYPE_TEMPLATE_INFO (NODE)    \
3086   && !CLASSTYPE_USE_TEMPLATE (NODE) \
3087   && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (NODE)))
3088
3089/* The name used by the user to name the typename type.  Typically,
3090   this is an IDENTIFIER_NODE, and the same as the DECL_NAME on the
3091   corresponding TYPE_DECL.  However, this may also be a
3092   TEMPLATE_ID_EXPR if we had something like `typename X::Y<T>'.  */
3093#define TYPENAME_TYPE_FULLNAME(NODE) \
3094  (TYPE_VALUES_RAW (TYPENAME_TYPE_CHECK (NODE)))
3095
3096/* True if a TYPENAME_TYPE was declared as an "enum".  */
3097#define TYPENAME_IS_ENUM_P(NODE) \
3098  (TREE_LANG_FLAG_0 (TYPENAME_TYPE_CHECK (NODE)))
3099
3100/* True if a TYPENAME_TYPE was declared as a "class", "struct", or
3101   "union".  */
3102#define TYPENAME_IS_CLASS_P(NODE) \
3103  (TREE_LANG_FLAG_1 (TYPENAME_TYPE_CHECK (NODE)))
3104
3105/* True if a TYPENAME_TYPE is in the process of being resolved.  */
3106#define TYPENAME_IS_RESOLVING_P(NODE) \
3107  (TREE_LANG_FLAG_2 (TYPENAME_TYPE_CHECK (NODE)))
3108
3109/* [class.virtual]
3110
3111   A class that declares or inherits a virtual function is called a
3112   polymorphic class.  */
3113#define TYPE_POLYMORPHIC_P(NODE) (TREE_LANG_FLAG_2 (NODE))
3114
3115/* Nonzero if this class has a virtual function table pointer.  */
3116#define TYPE_CONTAINS_VPTR_P(NODE)              \
3117  (TYPE_POLYMORPHIC_P (NODE) || CLASSTYPE_VBASECLASSES (NODE))
3118
3119/* This flag is true of a local VAR_DECL if it was declared in a for
3120   statement, but we are no longer in the scope of the for.  */
3121#define DECL_DEAD_FOR_LOCAL(NODE) DECL_LANG_FLAG_7 (VAR_DECL_CHECK (NODE))
3122
3123/* This flag is set on a VAR_DECL that is a DECL_DEAD_FOR_LOCAL
3124   if we already emitted a warning about using it.  */
3125#define DECL_ERROR_REPORTED(NODE) DECL_LANG_FLAG_0 (VAR_DECL_CHECK (NODE))
3126
3127/* Nonzero if NODE is a FUNCTION_DECL (for a function with global
3128   scope) declared in a local scope.  */
3129#define DECL_LOCAL_FUNCTION_P(NODE) \
3130  DECL_LANG_FLAG_0 (FUNCTION_DECL_CHECK (NODE))
3131
3132/* True if NODE was declared with auto in its return type, but it has
3133   started compilation and so the return type might have been changed by
3134   return type deduction; its declared return type should be found in
3135   DECL_STRUCT_FUNCTION(NODE)->language->x_auto_return_pattern.  */
3136#define FNDECL_USED_AUTO(NODE) \
3137  TREE_LANG_FLAG_2 (FUNCTION_DECL_CHECK (NODE))
3138
3139/* Nonzero if NODE is a DECL which we know about but which has not
3140   been explicitly declared, such as a built-in function or a friend
3141   declared inside a class.  In the latter case DECL_HIDDEN_FRIEND_P
3142   will be set.  */
3143#define DECL_ANTICIPATED(NODE) \
3144  (DECL_LANG_SPECIFIC (TYPE_FUNCTION_OR_TEMPLATE_DECL_CHECK (NODE)) \
3145   ->u.base.anticipated_p)
3146
3147/* Nonzero if NODE is a FUNCTION_DECL which was declared as a friend
3148   within a class but has not been declared in the surrounding scope.
3149   The function is invisible except via argument dependent lookup.  */
3150#define DECL_HIDDEN_FRIEND_P(NODE) \
3151  (LANG_DECL_FN_CHECK (DECL_COMMON_CHECK (NODE))->hidden_friend_p)
3152
3153/* Nonzero if DECL has been declared threadprivate by
3154   #pragma omp threadprivate.  */
3155#define CP_DECL_THREADPRIVATE_P(DECL) \
3156  (DECL_LANG_SPECIFIC (VAR_DECL_CHECK (DECL))->u.base.threadprivate_or_deleted_p)
3157
3158/* Nonzero if DECL was declared with '= delete'.  */
3159#define DECL_DELETED_FN(DECL) \
3160  (DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (DECL))->u.base.threadprivate_or_deleted_p)
3161
3162/* Nonzero if DECL was declared with '= default' (maybe implicitly).  */
3163#define DECL_DEFAULTED_FN(DECL) \
3164  (LANG_DECL_FN_CHECK (DECL)->defaulted_p)
3165
3166/* Nonzero if DECL is explicitly defaulted in the class body.  */
3167#define DECL_DEFAULTED_IN_CLASS_P(DECL)                                 \
3168  (DECL_DEFAULTED_FN (DECL) && DECL_INITIALIZED_IN_CLASS_P (DECL))
3169/* Nonzero if DECL was defaulted outside the class body.  */
3170#define DECL_DEFAULTED_OUTSIDE_CLASS_P(DECL)                            \
3171  (DECL_DEFAULTED_FN (DECL)                                             \
3172   && !(DECL_ARTIFICIAL (DECL) || DECL_INITIALIZED_IN_CLASS_P (DECL)))
3173
3174/* Record whether a typedef for type `int' was actually `signed int'.  */
3175#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
3176
3177/* Returns nonzero if DECL has external linkage, as specified by the
3178   language standard.  (This predicate may hold even when the
3179   corresponding entity is not actually given external linkage in the
3180   object file; see decl_linkage for details.)  */
3181#define DECL_EXTERNAL_LINKAGE_P(DECL) \
3182  (decl_linkage (DECL) == lk_external)
3183
3184/* Keep these codes in ascending code order.  */
3185
3186#define INTEGRAL_CODE_P(CODE)   \
3187  ((CODE) == ENUMERAL_TYPE      \
3188   || (CODE) == BOOLEAN_TYPE    \
3189   || (CODE) == INTEGER_TYPE)
3190
3191/* [basic.fundamental]
3192
3193   Types  bool, char, wchar_t, and the signed and unsigned integer types
3194   are collectively called integral types.
3195
3196   Note that INTEGRAL_TYPE_P, as defined in tree.h, allows enumeration
3197   types as well, which is incorrect in C++.  Keep these checks in
3198   ascending code order.  */
3199#define CP_INTEGRAL_TYPE_P(TYPE)                \
3200  (TREE_CODE (TYPE) == BOOLEAN_TYPE             \
3201   || TREE_CODE (TYPE) == INTEGER_TYPE)
3202
3203/* Returns true if TYPE is an integral or enumeration name.  Keep
3204   these checks in ascending code order.  */
3205#define INTEGRAL_OR_ENUMERATION_TYPE_P(TYPE) \
3206   (TREE_CODE (TYPE) == ENUMERAL_TYPE || CP_INTEGRAL_TYPE_P (TYPE))
3207
3208/* Returns true if TYPE is an integral or unscoped enumeration type.  */
3209#define INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P(TYPE) \
3210   (UNSCOPED_ENUM_P (TYPE) || CP_INTEGRAL_TYPE_P (TYPE))
3211
3212/* True if the class type TYPE is a literal type.  */
3213#define CLASSTYPE_LITERAL_P(TYPE)              \
3214   (LANG_TYPE_CLASS_CHECK (TYPE)->is_literal)
3215
3216/* [basic.fundamental]
3217
3218   Integral and floating types are collectively called arithmetic
3219   types. 
3220
3221   As a GNU extension, we also accept complex types.
3222
3223   Keep these checks in ascending code order.  */
3224#define ARITHMETIC_TYPE_P(TYPE) \
3225  (CP_INTEGRAL_TYPE_P (TYPE) \
3226   || TREE_CODE (TYPE) == REAL_TYPE \
3227   || TREE_CODE (TYPE) == COMPLEX_TYPE)
3228
3229/* True iff TYPE is cv decltype(nullptr).  */
3230#define NULLPTR_TYPE_P(TYPE) (TREE_CODE (TYPE) == NULLPTR_TYPE)
3231
3232/* [basic.types]
3233
3234   Arithmetic types, enumeration types, pointer types,
3235   pointer-to-member types, and std::nullptr_t are collectively called
3236   scalar types.
3237   
3238   Keep these checks in ascending code order.  */
3239#define SCALAR_TYPE_P(TYPE)                     \
3240  (TYPE_PTRDATAMEM_P (TYPE)                     \
3241   || TREE_CODE (TYPE) == ENUMERAL_TYPE         \
3242   || ARITHMETIC_TYPE_P (TYPE)                  \
3243   || TYPE_PTR_P (TYPE)                         \
3244   || TYPE_PTRMEMFUNC_P (TYPE)                  \
3245   || NULLPTR_TYPE_P (TYPE))
3246
3247/* Determines whether this type is a C++0x scoped enumeration
3248   type. Scoped enumerations types are introduced via "enum class" or
3249   "enum struct", e.g.,
3250
3251     enum class Color {
3252       Red, Green, Blue
3253     };
3254
3255   Scoped enumeration types are different from normal (unscoped)
3256   enumeration types in several ways:
3257   
3258     - The enumerators of a scoped enumeration type are only available
3259       within the scope of the enumeration type and not in the
3260       enclosing scope. For example, the Red color can be referred to
3261       with "Color::Red" but not "Red".
3262
3263     - Scoped enumerators and enumerations do not implicitly convert
3264       to integers or 'bool'.
3265
3266     - The underlying type of the enum is well-defined.  */
3267#define SCOPED_ENUM_P(TYPE)                                             \
3268  (TREE_CODE (TYPE) == ENUMERAL_TYPE && ENUM_IS_SCOPED (TYPE))
3269
3270/* Determine whether this is an unscoped enumeration type.  */
3271#define UNSCOPED_ENUM_P(TYPE)                                           \
3272  (TREE_CODE (TYPE) == ENUMERAL_TYPE && !ENUM_IS_SCOPED (TYPE))
3273
3274/* Set the flag indicating whether an ENUMERAL_TYPE is a C++0x scoped
3275   enumeration type (1) or a normal (unscoped) enumeration type
3276   (0).  */
3277#define SET_SCOPED_ENUM_P(TYPE, VAL)                    \
3278  (ENUM_IS_SCOPED (TYPE) = (VAL))
3279
3280#define SET_OPAQUE_ENUM_P(TYPE, VAL)                    \
3281  (ENUM_IS_OPAQUE (TYPE) = (VAL))
3282
3283#define OPAQUE_ENUM_P(TYPE)                             \
3284  (TREE_CODE (TYPE) == ENUMERAL_TYPE && ENUM_IS_OPAQUE (TYPE))
3285
3286/* Determines whether an ENUMERAL_TYPE has an explicit
3287   underlying type.  */
3288#define ENUM_FIXED_UNDERLYING_TYPE_P(NODE) (TYPE_LANG_FLAG_5 (NODE))
3289
3290/* Returns the underlying type of the given enumeration type. The
3291   underlying type is determined in different ways, depending on the
3292   properties of the enum:
3293
3294     - In C++0x, the underlying type can be explicitly specified, e.g.,
3295
3296         enum E1 : char { ... } // underlying type is char
3297
3298     - In a C++0x scoped enumeration, the underlying type is int
3299       unless otherwises specified:
3300
3301         enum class E2 { ... } // underlying type is int
3302
3303     - Otherwise, the underlying type is determined based on the
3304       values of the enumerators. In this case, the
3305       ENUM_UNDERLYING_TYPE will not be set until after the definition
3306       of the enumeration is completed by finish_enum.  */
3307#define ENUM_UNDERLYING_TYPE(TYPE) \
3308  TREE_TYPE (ENUMERAL_TYPE_CHECK (TYPE))
3309
3310/* [dcl.init.aggr]
3311
3312   An aggregate is an array or a class with no user-provided
3313   constructors, no brace-or-equal-initializers for non-static data
3314   members, no private or protected non-static data members, no
3315   base classes, and no virtual functions.
3316
3317   As an extension, we also treat vectors as aggregates.  Keep these
3318   checks in ascending code order.  */
3319#define CP_AGGREGATE_TYPE_P(TYPE)                               \
3320  (TREE_CODE (TYPE) == VECTOR_TYPE                              \
3321   ||TREE_CODE (TYPE) == ARRAY_TYPE                             \
3322   || (CLASS_TYPE_P (TYPE) && !CLASSTYPE_NON_AGGREGATE (TYPE)))
3323
3324/* Nonzero for a class type means that the class type has a
3325   user-declared constructor.  */
3326#define TYPE_HAS_USER_CONSTRUCTOR(NODE) (TYPE_LANG_FLAG_1 (NODE))
3327
3328/* When appearing in an INDIRECT_REF, it means that the tree structure
3329   underneath is actually a call to a constructor.  This is needed
3330   when the constructor must initialize local storage (which can
3331   be automatically destroyed), rather than allowing it to allocate
3332   space from the heap.
3333
3334   When appearing in a SAVE_EXPR, it means that underneath
3335   is a call to a constructor.
3336
3337   When appearing in a CONSTRUCTOR, the expression is a
3338   compound literal.
3339
3340   When appearing in a FIELD_DECL, it means that this field
3341   has been duly initialized in its constructor.  */
3342#define TREE_HAS_CONSTRUCTOR(NODE) (TREE_LANG_FLAG_4 (NODE))
3343
3344/* True if NODE is a brace-enclosed initializer.  */
3345#define BRACE_ENCLOSED_INITIALIZER_P(NODE) \
3346  (TREE_CODE (NODE) == CONSTRUCTOR && TREE_TYPE (NODE) == init_list_type_node)
3347
3348/* True if NODE is a compound-literal, i.e., a brace-enclosed
3349   initializer cast to a particular type.  */
3350#define COMPOUND_LITERAL_P(NODE) \
3351  (TREE_CODE (NODE) == CONSTRUCTOR && TREE_HAS_CONSTRUCTOR (NODE))
3352
3353#define EMPTY_CONSTRUCTOR_P(NODE) (TREE_CODE (NODE) == CONSTRUCTOR \
3354                                   && vec_safe_is_empty(CONSTRUCTOR_ELTS(NODE))\
3355                                   && !TREE_HAS_CONSTRUCTOR (NODE))
3356
3357/* True if NODE is a init-list used as a direct-initializer, i.e.
3358   B b{1,2}, not B b({1,2}) or B b = {1,2}.  */
3359#define CONSTRUCTOR_IS_DIRECT_INIT(NODE) (TREE_LANG_FLAG_0 (CONSTRUCTOR_CHECK (NODE)))
3360
3361/* True if NODE represents a conversion for direct-initialization in a
3362   template.  Set by perform_implicit_conversion_flags.  */
3363#define IMPLICIT_CONV_EXPR_DIRECT_INIT(NODE) \
3364  (TREE_LANG_FLAG_0 (IMPLICIT_CONV_EXPR_CHECK (NODE)))
3365
3366/* Nonzero means that an object of this type can not be initialized using
3367   an initializer list.  */
3368#define CLASSTYPE_NON_AGGREGATE(NODE) \
3369  (LANG_TYPE_CLASS_CHECK (NODE)->non_aggregate)
3370#define TYPE_NON_AGGREGATE_CLASS(NODE) \
3371  (CLASS_TYPE_P (NODE) && CLASSTYPE_NON_AGGREGATE (NODE))
3372
3373/* Nonzero if there is a non-trivial X::op=(cv X&) for this class.  */
3374#define TYPE_HAS_COMPLEX_COPY_ASSIGN(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_copy_assign)
3375
3376/* Nonzero if there is a non-trivial X::X(cv X&) for this class.  */
3377#define TYPE_HAS_COMPLEX_COPY_CTOR(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_copy_ctor)
3378
3379/* Nonzero if there is a non-trivial X::op=(X&&) for this class.  */
3380#define TYPE_HAS_COMPLEX_MOVE_ASSIGN(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_move_assign)
3381
3382/* Nonzero if there is a non-trivial X::X(X&&) for this class.  */
3383#define TYPE_HAS_COMPLEX_MOVE_CTOR(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_move_ctor)
3384
3385/* Nonzero if there is a non-trivial default constructor for this class.  */
3386#define TYPE_HAS_COMPLEX_DFLT(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_dflt)
3387
3388/* Nonzero if TYPE has a trivial destructor.  From [class.dtor]:
3389
3390     A destructor is trivial if it is an implicitly declared
3391     destructor and if:
3392
3393       - all of the direct base classes of its class have trivial
3394         destructors,
3395
3396       - for all of the non-static data members of its class that are
3397         of class type (or array thereof), each such class has a
3398         trivial destructor.  */
3399#define TYPE_HAS_TRIVIAL_DESTRUCTOR(NODE) \
3400  (!TYPE_HAS_NONTRIVIAL_DESTRUCTOR (NODE))
3401
3402/* Nonzero for _TYPE node means that this type does not have a trivial
3403   destructor.  Therefore, destroying an object of this type will
3404   involve a call to a destructor.  This can apply to objects of
3405   ARRAY_TYPE is the type of the elements needs a destructor.  */
3406#define TYPE_HAS_NONTRIVIAL_DESTRUCTOR(NODE) \
3407  (TYPE_LANG_FLAG_4 (NODE))
3408
3409/* Nonzero for class type means that the default constructor is trivial.  */
3410#define TYPE_HAS_TRIVIAL_DFLT(NODE) \
3411  (TYPE_HAS_DEFAULT_CONSTRUCTOR (NODE) && ! TYPE_HAS_COMPLEX_DFLT (NODE))
3412
3413/* Nonzero for class type means that copy initialization of this type can use
3414   a bitwise copy.  */
3415#define TYPE_HAS_TRIVIAL_COPY_CTOR(NODE) \
3416  (TYPE_HAS_COPY_CTOR (NODE) && ! TYPE_HAS_COMPLEX_COPY_CTOR (NODE))
3417
3418/* Nonzero for class type means that assignment of this type can use
3419   a bitwise copy.  */
3420#define TYPE_HAS_TRIVIAL_COPY_ASSIGN(NODE) \
3421  (TYPE_HAS_COPY_ASSIGN (NODE) && ! TYPE_HAS_COMPLEX_COPY_ASSIGN (NODE))
3422
3423/* Returns true if NODE is a pointer-to-data-member.  */
3424#define TYPE_PTRDATAMEM_P(NODE)                 \
3425  (TREE_CODE (NODE) == OFFSET_TYPE)
3426/* Returns true if NODE is a pointer.  */
3427#define TYPE_PTR_P(NODE)                        \
3428  (TREE_CODE (NODE) == POINTER_TYPE)
3429
3430/* Returns true if NODE is an object type:
3431
3432     [basic.types]
3433
3434     An object type is a (possibly cv-qualified) type that is not a
3435     function type, not a reference type, and not a void type.
3436
3437   Keep these checks in ascending order, for speed.  */
3438#define TYPE_OBJ_P(NODE)                        \
3439  (TREE_CODE (NODE) != REFERENCE_TYPE           \
3440   && TREE_CODE (NODE) != VOID_TYPE             \
3441   && TREE_CODE (NODE) != FUNCTION_TYPE         \
3442   && TREE_CODE (NODE) != METHOD_TYPE)
3443
3444/* Returns true if NODE is a pointer to an object.  Keep these checks
3445   in ascending tree code order.  */
3446#define TYPE_PTROB_P(NODE)                                      \
3447  (TYPE_PTR_P (NODE) && TYPE_OBJ_P (TREE_TYPE (NODE)))
3448
3449/* Returns true if NODE is a reference to an object.  Keep these checks
3450   in ascending tree code order.  */
3451#define TYPE_REF_OBJ_P(NODE)                                    \
3452  (TREE_CODE (NODE) == REFERENCE_TYPE && TYPE_OBJ_P (TREE_TYPE (NODE)))
3453
3454/* Returns true if NODE is a pointer to an object, or a pointer to
3455   void.  Keep these checks in ascending tree code order.  */
3456#define TYPE_PTROBV_P(NODE)                                     \
3457  (TYPE_PTR_P (NODE)                                            \
3458   && !(TREE_CODE (TREE_TYPE (NODE)) == FUNCTION_TYPE           \
3459        || TREE_CODE (TREE_TYPE (NODE)) == METHOD_TYPE))
3460
3461/* Returns true if NODE is a pointer to function.  */
3462#define TYPE_PTRFN_P(NODE)                              \
3463  (TREE_CODE (NODE) == POINTER_TYPE                     \
3464   && TREE_CODE (TREE_TYPE (NODE)) == FUNCTION_TYPE)
3465
3466/* Returns true if NODE is a reference to function.  */
3467#define TYPE_REFFN_P(NODE)                              \
3468  (TREE_CODE (NODE) == REFERENCE_TYPE                   \
3469   && TREE_CODE (TREE_TYPE (NODE)) == FUNCTION_TYPE)
3470
3471/* Nonzero for _TYPE node means that this type is a pointer to member
3472   function type.  */
3473#define TYPE_PTRMEMFUNC_P(NODE)         \
3474  (TREE_CODE (NODE) == RECORD_TYPE      \
3475   && TYPE_LANG_SPECIFIC (NODE)         \
3476   && TYPE_PTRMEMFUNC_FLAG (NODE))
3477
3478#define TYPE_PTRMEMFUNC_FLAG(NODE) \
3479  (LANG_TYPE_CLASS_CHECK (NODE)->ptrmemfunc_flag)
3480
3481/* Returns true if NODE is a pointer-to-member.  */
3482#define TYPE_PTRMEM_P(NODE) \
3483  (TYPE_PTRDATAMEM_P (NODE) || TYPE_PTRMEMFUNC_P (NODE))
3484
3485/* Returns true if NODE is a pointer or a pointer-to-member.  */
3486#define TYPE_PTR_OR_PTRMEM_P(NODE) \
3487  (TYPE_PTR_P (NODE) || TYPE_PTRMEM_P (NODE))
3488
3489/* Indicates when overload resolution may resolve to a pointer to
3490   member function. [expr.unary.op]/3 */
3491#define PTRMEM_OK_P(NODE) \
3492  TREE_LANG_FLAG_0 (TREE_CHECK3 ((NODE), ADDR_EXPR, OFFSET_REF, SCOPE_REF))
3493
3494/* Get the POINTER_TYPE to the METHOD_TYPE associated with this
3495   pointer to member function.  TYPE_PTRMEMFUNC_P _must_ be true,
3496   before using this macro.  */
3497#define TYPE_PTRMEMFUNC_FN_TYPE(NODE) \
3498  (TREE_TYPE (TYPE_FIELDS (NODE)))
3499
3500/* Returns `A' for a type like `int (A::*)(double)' */
3501#define TYPE_PTRMEMFUNC_OBJECT_TYPE(NODE) \
3502  TYPE_METHOD_BASETYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (NODE)))
3503
3504/* These are use to manipulate the canonical RECORD_TYPE from the
3505   hashed POINTER_TYPE, and can only be used on the POINTER_TYPE.  */
3506#define TYPE_GET_PTRMEMFUNC_TYPE(NODE) \
3507  (TYPE_LANG_SPECIFIC (NODE) ? LANG_TYPE_PTRMEM_CHECK (NODE)->record : NULL)
3508#define TYPE_SET_PTRMEMFUNC_TYPE(NODE, VALUE)                           \
3509  do {                                                                  \
3510    if (TYPE_LANG_SPECIFIC (NODE) == NULL)                              \
3511      {                                                                 \
3512        TYPE_LANG_SPECIFIC (NODE) = ggc_alloc_cleared_lang_type         \
3513         (sizeof (struct lang_type_ptrmem));                            \
3514        TYPE_LANG_SPECIFIC (NODE)->u.ptrmem.h.is_lang_type_class = 0;   \
3515      }                                                                 \
3516    TYPE_LANG_SPECIFIC (NODE)->u.ptrmem.record = (VALUE);               \
3517  } while (0)
3518
3519/* For a pointer-to-member type of the form `T X::*', this is `X'.
3520   For a type like `void (X::*)() const', this type is `X', not `const
3521   X'.  To get at the `const X' you have to look at the
3522   TYPE_PTRMEM_POINTED_TO_TYPE; there, the first parameter will have
3523   type `const X*'.  */
3524#define TYPE_PTRMEM_CLASS_TYPE(NODE)                    \
3525  (TYPE_PTRDATAMEM_P (NODE)                                     \
3526   ? TYPE_OFFSET_BASETYPE (NODE)                \
3527   : TYPE_PTRMEMFUNC_OBJECT_TYPE (NODE))
3528
3529/* For a pointer-to-member type of the form `T X::*', this is `T'.  */
3530#define TYPE_PTRMEM_POINTED_TO_TYPE(NODE)               \
3531   (TYPE_PTRDATAMEM_P (NODE)                            \
3532    ? TREE_TYPE (NODE)                                  \
3533    : TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (NODE)))
3534
3535/* For a pointer-to-member constant `X::Y' this is the RECORD_TYPE for
3536   `X'.  */
3537#define PTRMEM_CST_CLASS(NODE) \
3538  TYPE_PTRMEM_CLASS_TYPE (TREE_TYPE (PTRMEM_CST_CHECK (NODE)))
3539
3540/* For a pointer-to-member constant `X::Y' this is the _DECL for
3541   `Y'.  */
3542#define PTRMEM_CST_MEMBER(NODE) (((ptrmem_cst_t)PTRMEM_CST_CHECK (NODE))->member)
3543
3544/* The expression in question for a TYPEOF_TYPE.  */
3545#define TYPEOF_TYPE_EXPR(NODE) (TYPE_VALUES_RAW (TYPEOF_TYPE_CHECK (NODE)))
3546
3547/* The type in question for an UNDERLYING_TYPE.  */
3548#define UNDERLYING_TYPE_TYPE(NODE) \
3549  (TYPE_VALUES_RAW (UNDERLYING_TYPE_CHECK (NODE)))
3550
3551/* The type in question for BASES.  */
3552#define BASES_TYPE(NODE) \
3553  (TYPE_VALUES_RAW (BASES_CHECK (NODE)))
3554
3555#define BASES_DIRECT(NODE) \
3556  TREE_LANG_FLAG_0 (BASES_CHECK (NODE))
3557
3558/* The expression in question for a DECLTYPE_TYPE.  */
3559#define DECLTYPE_TYPE_EXPR(NODE) (TYPE_VALUES_RAW (DECLTYPE_TYPE_CHECK (NODE)))
3560
3561/* Whether the DECLTYPE_TYPE_EXPR of NODE was originally parsed as an
3562   id-expression or a member-access expression. When false, it was
3563   parsed as a full expression.  */
3564#define DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P(NODE) \
3565  (DECLTYPE_TYPE_CHECK (NODE))->type_common.string_flag
3566
3567/* These flags indicate that we want different semantics from normal
3568   decltype: lambda capture just drops references, lambda proxies look
3569   through implicit dereference.  */
3570#define DECLTYPE_FOR_LAMBDA_CAPTURE(NODE) \
3571  TREE_LANG_FLAG_0 (DECLTYPE_TYPE_CHECK (NODE))
3572#define DECLTYPE_FOR_LAMBDA_PROXY(NODE) \
3573  TREE_LANG_FLAG_2 (DECLTYPE_TYPE_CHECK (NODE))
3574
3575/* Nonzero for VAR_DECL and FUNCTION_DECL node means that `extern' was
3576   specified in its declaration.  This can also be set for an
3577   erroneously declared PARM_DECL.  */
3578#define DECL_THIS_EXTERN(NODE) \
3579  DECL_LANG_FLAG_2 (VAR_FUNCTION_OR_PARM_DECL_CHECK (NODE))
3580
3581/* Nonzero for VAR_DECL and FUNCTION_DECL node means that `static' was
3582   specified in its declaration.  This can also be set for an
3583   erroneously declared PARM_DECL.  */
3584#define DECL_THIS_STATIC(NODE) \
3585  DECL_LANG_FLAG_6 (VAR_FUNCTION_OR_PARM_DECL_CHECK (NODE))
3586
3587/* Nonzero for FIELD_DECL node means that this field is a base class
3588   of the parent object, as opposed to a member field.  */
3589#define DECL_FIELD_IS_BASE(NODE) \
3590  DECL_LANG_FLAG_6 (FIELD_DECL_CHECK (NODE))
3591
3592/* Nonzero for FIELD_DECL node means that this field is a simple (no
3593   explicit initializer) lambda capture field, making it invisible to
3594   name lookup in unevaluated contexts.  */
3595#define DECL_NORMAL_CAPTURE_P(NODE) \
3596  DECL_LANG_FLAG_7 (FIELD_DECL_CHECK (NODE))
3597
3598/* Nonzero if TYPE is an anonymous union or struct type.  We have to use a
3599   flag for this because "A union for which objects or pointers are
3600   declared is not an anonymous union" [class.union].  */
3601#define ANON_AGGR_TYPE_P(NODE)                          \
3602  (CLASS_TYPE_P (NODE) && LANG_TYPE_CLASS_CHECK (NODE)->anon_aggr)
3603#define SET_ANON_AGGR_TYPE_P(NODE)                      \
3604  (LANG_TYPE_CLASS_CHECK (NODE)->anon_aggr = 1)
3605
3606/* Nonzero if TYPE is an anonymous union type.  */
3607#define ANON_UNION_TYPE_P(NODE) \
3608  (TREE_CODE (NODE) == UNION_TYPE && ANON_AGGR_TYPE_P (NODE))
3609
3610/* Define fields and accessors for nodes representing declared names.  */
3611
3612#define TYPE_WAS_ANONYMOUS(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->was_anonymous)
3613
3614/* C++: all of these are overloaded!  These apply only to TYPE_DECLs.  */
3615
3616/* The format of each node in the DECL_FRIENDLIST is as follows:
3617
3618   The TREE_PURPOSE will be the name of a function, i.e., an
3619   IDENTIFIER_NODE.  The TREE_VALUE will be itself a TREE_LIST, whose
3620   TREE_VALUEs are friends with the given name.  */
3621#define DECL_FRIENDLIST(NODE)           (DECL_INITIAL (NODE))
3622#define FRIEND_NAME(LIST) (TREE_PURPOSE (LIST))
3623#define FRIEND_DECLS(LIST) (TREE_VALUE (LIST))
3624
3625/* The DECL_ACCESS, if non-NULL, is a TREE_LIST.  The TREE_PURPOSE of
3626   each node is a type; the TREE_VALUE is the access granted for this
3627   DECL in that type.  The DECL_ACCESS is set by access declarations.
3628   For example, if a member that would normally be public in a
3629   derived class is made protected, then the derived class and the
3630   protected_access_node will appear in the DECL_ACCESS for the node.  */
3631#define DECL_ACCESS(NODE) (LANG_DECL_U2_CHECK (NODE, 0)->access)
3632
3633/* Nonzero if the FUNCTION_DECL is a global constructor.  */
3634#define DECL_GLOBAL_CTOR_P(NODE) \
3635  (LANG_DECL_FN_CHECK (NODE)->global_ctor_p)
3636
3637/* Nonzero if the FUNCTION_DECL is a global destructor.  */
3638#define DECL_GLOBAL_DTOR_P(NODE) \
3639  (LANG_DECL_FN_CHECK (NODE)->global_dtor_p)
3640
3641/* Accessor macros for C++ template decl nodes.  */
3642
3643/* The DECL_TEMPLATE_PARMS are a list.  The TREE_PURPOSE of each node
3644   is a INT_CST whose TREE_INT_CST_LOW indicates the level of the
3645   template parameters, with 1 being the outermost set of template
3646   parameters.  The TREE_VALUE is a vector, whose elements are the
3647   template parameters at each level.  Each element in the vector is a
3648   TREE_LIST, whose TREE_VALUE is a PARM_DECL (if the parameter is a
3649   non-type parameter), or a TYPE_DECL (if the parameter is a type
3650   parameter).  The TREE_PURPOSE is the default value, if any.  The
3651   TEMPLATE_PARM_INDEX for the parameter is available as the
3652   DECL_INITIAL (for a PARM_DECL) or as the TREE_TYPE (for a
3653   TYPE_DECL).  */
3654#define DECL_TEMPLATE_PARMS(NODE)       DECL_NON_COMMON_CHECK (NODE)->decl_non_common.arguments
3655#define DECL_INNERMOST_TEMPLATE_PARMS(NODE) \
3656   INNERMOST_TEMPLATE_PARMS (DECL_TEMPLATE_PARMS (NODE))
3657#define DECL_NTPARMS(NODE) \
3658   TREE_VEC_LENGTH (DECL_INNERMOST_TEMPLATE_PARMS (NODE))
3659/* For function, method, class-data templates.  */
3660#define DECL_TEMPLATE_RESULT(NODE)      DECL_RESULT_FLD (NODE)
3661/* For a function template at namespace scope, DECL_TEMPLATE_INSTANTIATIONS
3662   lists all instantiations and specializations of the function so that
3663   tsubst_friend_function can reassign them to another template if we find
3664   that the namespace-scope template is really a partial instantiation of a
3665   friend template.
3666
3667   For a class template the DECL_TEMPLATE_INSTANTIATIONS lists holds
3668   all instantiations and specializations of the class type, including
3669   partial instantiations and partial specializations, so that if we
3670   explicitly specialize a partial instantiation we can walk the list
3671   in maybe_process_partial_specialization and reassign them or complain
3672   as appropriate.
3673
3674   In both cases, the TREE_PURPOSE of each node contains the arguments
3675   used; the TREE_VALUE contains the generated variable.  The template
3676   arguments are always complete.  For example, given:
3677
3678      template <class T> struct S1 {
3679        template <class U> struct S2 {};
3680        template <class U> struct S2<U*> {};
3681      };
3682
3683   the record for the partial specialization will contain, as its
3684   argument list, { {T}, {U*} }, and will be on the
3685   DECL_TEMPLATE_INSTANTIATIONS list for `template <class T> template
3686   <class U> struct S1<T>::S2'.
3687
3688   This list is not used for other templates.  */
3689#define DECL_TEMPLATE_INSTANTIATIONS(NODE) DECL_VINDEX (NODE)
3690/* For a class template, this list contains the partial
3691   specializations of this template.  (Full specializations are not
3692   recorded on this list.)  The TREE_PURPOSE holds the arguments used
3693   in the partial specialization (e.g., for `template <class T> struct
3694   S<T*, int>' this will be `T*'.)  The arguments will also include
3695   any outer template arguments.  The TREE_VALUE holds the innermost
3696   template parameters for the specialization (e.g., `T' in the
3697   example above.)  The TREE_TYPE is the _TYPE node for the partial
3698   specialization.
3699
3700   This list is not used for other templates.  */
3701#define DECL_TEMPLATE_SPECIALIZATIONS(NODE)     DECL_SIZE (NODE)
3702
3703/* Nonzero for a DECL which is actually a template parameter.  Keep
3704   these checks in ascending tree code order.   */
3705#define DECL_TEMPLATE_PARM_P(NODE)              \
3706  (DECL_LANG_FLAG_0 (NODE)                      \
3707   && (TREE_CODE (NODE) == CONST_DECL           \
3708       || TREE_CODE (NODE) == PARM_DECL         \
3709       || TREE_CODE (NODE) == TYPE_DECL         \
3710       || TREE_CODE (NODE) == TEMPLATE_DECL))
3711
3712/* Mark NODE as a template parameter.  */
3713#define SET_DECL_TEMPLATE_PARM_P(NODE) \
3714  (DECL_LANG_FLAG_0 (NODE) = 1)
3715
3716/* Nonzero if NODE is a template template parameter.  */
3717#define DECL_TEMPLATE_TEMPLATE_PARM_P(NODE) \
3718  (TREE_CODE (NODE) == TEMPLATE_DECL && DECL_TEMPLATE_PARM_P (NODE))
3719
3720/* Nonzero if NODE is a TEMPLATE_DECL representing an
3721   UNBOUND_CLASS_TEMPLATE tree node.  */
3722#define DECL_UNBOUND_CLASS_TEMPLATE_P(NODE) \
3723  (TREE_CODE (NODE) == TEMPLATE_DECL && !DECL_TEMPLATE_RESULT (NODE))
3724
3725#define DECL_FUNCTION_TEMPLATE_P(NODE)  \
3726  (TREE_CODE (NODE) == TEMPLATE_DECL \
3727   && !DECL_UNBOUND_CLASS_TEMPLATE_P (NODE) \
3728   && TREE_CODE (DECL_TEMPLATE_RESULT (NODE)) == FUNCTION_DECL)
3729
3730/* Nonzero for a DECL that represents a class template or alias
3731   template.  */
3732#define DECL_TYPE_TEMPLATE_P(NODE)                              \
3733  (TREE_CODE (NODE) == TEMPLATE_DECL                            \
3734   && DECL_TEMPLATE_RESULT (NODE) != NULL_TREE                  \
3735   && TREE_CODE (DECL_TEMPLATE_RESULT (NODE)) == TYPE_DECL)
3736
3737/* Nonzero for a DECL that represents a class template.  */
3738#define DECL_CLASS_TEMPLATE_P(NODE)                             \
3739  (DECL_TYPE_TEMPLATE_P (NODE)                                  \
3740   && DECL_IMPLICIT_TYPEDEF_P (DECL_TEMPLATE_RESULT (NODE)))
3741
3742/* Nonzero for a TEMPLATE_DECL that represents an alias template.  */
3743#define DECL_ALIAS_TEMPLATE_P(NODE)                     \
3744  (DECL_TYPE_TEMPLATE_P (NODE)                          \
3745   && !DECL_ARTIFICIAL (DECL_TEMPLATE_RESULT (NODE)))
3746
3747/* Nonzero for a NODE which declares a type.  */
3748#define DECL_DECLARES_TYPE_P(NODE) \
3749  (TREE_CODE (NODE) == TYPE_DECL || DECL_TYPE_TEMPLATE_P (NODE))
3750
3751/* Nonzero if NODE declares a function.  */
3752#define DECL_DECLARES_FUNCTION_P(NODE) \
3753  (TREE_CODE (NODE) == FUNCTION_DECL || DECL_FUNCTION_TEMPLATE_P (NODE))
3754
3755/* Nonzero if NODE is the typedef implicitly generated for a type when
3756   the type is declared.  In C++, `struct S {};' is roughly
3757   equivalent to `struct S {}; typedef struct S S;' in C.
3758   DECL_IMPLICIT_TYPEDEF_P will hold for the typedef indicated in this
3759   example.  In C++, there is a second implicit typedef for each
3760   class, in the scope of `S' itself, so that you can say `S::S'.
3761   DECL_SELF_REFERENCE_P will hold for that second typedef.  */
3762#define DECL_IMPLICIT_TYPEDEF_P(NODE) \
3763  (TREE_CODE (NODE) == TYPE_DECL && DECL_LANG_FLAG_2 (NODE))
3764#define SET_DECL_IMPLICIT_TYPEDEF_P(NODE) \
3765  (DECL_LANG_FLAG_2 (NODE) = 1)
3766#define DECL_SELF_REFERENCE_P(NODE) \
3767  (TREE_CODE (NODE) == TYPE_DECL && DECL_LANG_FLAG_4 (NODE))
3768#define SET_DECL_SELF_REFERENCE_P(NODE) \
3769  (DECL_LANG_FLAG_4 (NODE) = 1)
3770
3771/* A `primary' template is one that has its own template header.  A
3772   member function of a class template is a template, but not primary.
3773   A member template is primary.  Friend templates are primary, too.  */
3774
3775/* Returns the primary template corresponding to these parameters.  */
3776#define DECL_PRIMARY_TEMPLATE(NODE) \
3777  (TREE_TYPE (DECL_INNERMOST_TEMPLATE_PARMS (NODE)))
3778
3779/* Returns nonzero if NODE is a primary template.  */
3780#define PRIMARY_TEMPLATE_P(NODE) (DECL_PRIMARY_TEMPLATE (NODE) == (NODE))
3781
3782/* Nonzero iff NODE is a specialization of a template.  The value
3783   indicates the type of specializations:
3784
3785     1=implicit instantiation
3786
3787     2=partial or explicit specialization, e.g.:
3788
3789        template <> int min<int> (int, int),
3790
3791     3=explicit instantiation, e.g.:
3792 
3793        template int min<int> (int, int);
3794
3795   Note that NODE will be marked as a specialization even if the
3796   template it is instantiating is not a primary template.  For
3797   example, given:
3798
3799     template <typename T> struct O {
3800       void f();
3801       struct I {};
3802     };
3803   
3804   both O<int>::f and O<int>::I will be marked as instantiations.
3805
3806   If DECL_USE_TEMPLATE is nonzero, then DECL_TEMPLATE_INFO will also
3807   be non-NULL.  */
3808#define DECL_USE_TEMPLATE(NODE) (DECL_LANG_SPECIFIC (NODE)->u.base.use_template)
3809
3810/* Like DECL_USE_TEMPLATE, but for class types.  */
3811#define CLASSTYPE_USE_TEMPLATE(NODE) \
3812  (LANG_TYPE_CLASS_CHECK (NODE)->use_template)
3813
3814/* True if NODE is a specialization of a primary template.  */
3815#define CLASSTYPE_SPECIALIZATION_OF_PRIMARY_TEMPLATE_P(NODE)    \
3816  (CLASS_TYPE_P (NODE)                                          \
3817   && CLASSTYPE_USE_TEMPLATE (NODE)                             \
3818   && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (NODE)))
3819
3820#define DECL_TEMPLATE_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) & 1)
3821#define CLASSTYPE_TEMPLATE_INSTANTIATION(NODE) \
3822  (CLASSTYPE_USE_TEMPLATE (NODE) & 1)
3823
3824#define DECL_TEMPLATE_SPECIALIZATION(NODE) (DECL_USE_TEMPLATE (NODE) == 2)
3825#define SET_DECL_TEMPLATE_SPECIALIZATION(NODE) (DECL_USE_TEMPLATE (NODE) = 2)
3826
3827/* Returns true for an explicit or partial specialization of a class
3828   template.  */
3829#define CLASSTYPE_TEMPLATE_SPECIALIZATION(NODE) \
3830  (CLASSTYPE_USE_TEMPLATE (NODE) == 2)
3831#define SET_CLASSTYPE_TEMPLATE_SPECIALIZATION(NODE) \
3832  (CLASSTYPE_USE_TEMPLATE (NODE) = 2)
3833
3834#define DECL_IMPLICIT_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) == 1)
3835#define SET_DECL_IMPLICIT_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) = 1)
3836#define CLASSTYPE_IMPLICIT_INSTANTIATION(NODE) \
3837  (CLASSTYPE_USE_TEMPLATE (NODE) == 1)
3838#define SET_CLASSTYPE_IMPLICIT_INSTANTIATION(NODE) \
3839  (CLASSTYPE_USE_TEMPLATE (NODE) = 1)
3840
3841#define DECL_EXPLICIT_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) == 3)
3842#define SET_DECL_EXPLICIT_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) = 3)
3843#define CLASSTYPE_EXPLICIT_INSTANTIATION(NODE) \
3844  (CLASSTYPE_USE_TEMPLATE (NODE) == 3)
3845#define SET_CLASSTYPE_EXPLICIT_INSTANTIATION(NODE) \
3846  (CLASSTYPE_USE_TEMPLATE (NODE) = 3)
3847
3848/* Nonzero if DECL is a friend function which is an instantiation
3849   from the point of view of the compiler, but not from the point of
3850   view of the language.  For example given:
3851      template <class T> struct S { friend void f(T) {}; };
3852   the declaration of `void f(int)' generated when S<int> is
3853   instantiated will not be a DECL_TEMPLATE_INSTANTIATION, but will be
3854   a DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION.  */
3855#define DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION(DECL) \
3856  (DECL_TEMPLATE_INFO (DECL) && !DECL_USE_TEMPLATE (DECL))
3857
3858/* Nonzero if DECL is a function generated from a function 'temploid',
3859   i.e. template, member of class template, or dependent friend.  */
3860#define DECL_TEMPLOID_INSTANTIATION(DECL)               \
3861  (DECL_TEMPLATE_INSTANTIATION (DECL)                   \
3862   || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (DECL))
3863
3864/* Nonzero if DECL is either defined implicitly by the compiler or
3865   generated from a temploid.  */
3866#define DECL_GENERATED_P(DECL) \
3867  (DECL_TEMPLOID_INSTANTIATION (DECL) || DECL_DEFAULTED_FN (DECL))
3868
3869/* Nonzero iff we are currently processing a declaration for an
3870   entity with its own template parameter list, and which is not a
3871   full specialization.  */
3872#define PROCESSING_REAL_TEMPLATE_DECL_P() \
3873  (processing_template_decl > template_class_depth (current_scope ()))
3874
3875/* Nonzero if this VAR_DECL or FUNCTION_DECL has already been
3876   instantiated, i.e. its definition has been generated from the
3877   pattern given in the template.  */
3878#define DECL_TEMPLATE_INSTANTIATED(NODE) \
3879  DECL_LANG_FLAG_1 (VAR_OR_FUNCTION_DECL_CHECK (NODE))
3880
3881/* We know what we're doing with this decl now.  */
3882#define DECL_INTERFACE_KNOWN(NODE) DECL_LANG_FLAG_5 (NODE)
3883
3884/* DECL_EXTERNAL must be set on a decl until the decl is actually emitted,
3885   so that assemble_external will work properly.  So we have this flag to
3886   tell us whether the decl is really not external.
3887
3888   This flag does not indicate whether or not the decl is defined in the
3889   current translation unit; it indicates whether or not we should emit the
3890   decl at the end of compilation if it is defined and needed.  */
3891#define DECL_NOT_REALLY_EXTERN(NODE) \
3892  (DECL_LANG_SPECIFIC (NODE)->u.base.not_really_extern)
3893
3894#define DECL_REALLY_EXTERN(NODE) \
3895  (DECL_EXTERNAL (NODE) && ! DECL_NOT_REALLY_EXTERN (NODE))
3896
3897/* A thunk is a stub function.
3898
3899   A thunk is an alternate entry point for an ordinary FUNCTION_DECL.
3900   The address of the ordinary FUNCTION_DECL is given by the
3901   DECL_INITIAL, which is always an ADDR_EXPR whose operand is a
3902   FUNCTION_DECL.  The job of the thunk is to either adjust the this
3903   pointer before transferring control to the FUNCTION_DECL, or call
3904   FUNCTION_DECL and then adjust the result value. Note, the result
3905   pointer adjusting thunk must perform a call to the thunked
3906   function, (or be implemented via passing some invisible parameter
3907   to the thunked function, which is modified to perform the
3908   adjustment just before returning).
3909
3910   A thunk may perform either, or both, of the following operations:
3911
3912   o Adjust the this or result pointer by a constant offset.
3913   o Adjust the this or result pointer by looking up a vcall or vbase offset
3914     in the vtable.
3915
3916   A this pointer adjusting thunk converts from a base to a derived
3917   class, and hence adds the offsets. A result pointer adjusting thunk
3918   converts from a derived class to a base, and hence subtracts the
3919   offsets.  If both operations are performed, then the constant
3920   adjustment is performed first for this pointer adjustment and last
3921   for the result pointer adjustment.
3922
3923   The constant adjustment is given by THUNK_FIXED_OFFSET.  If the
3924   vcall or vbase offset is required, THUNK_VIRTUAL_OFFSET is
3925   used. For this pointer adjusting thunks, it is the vcall offset
3926   into the vtable.  For result pointer adjusting thunks it is the
3927   binfo of the virtual base to convert to.  Use that binfo's vbase
3928   offset.
3929
3930   It is possible to have equivalent covariant thunks.  These are
3931   distinct virtual covariant thunks whose vbase offsets happen to
3932   have the same value.  THUNK_ALIAS is used to pick one as the
3933   canonical thunk, which will get all the this pointer adjusting
3934   thunks attached to it.  */
3935
3936/* An integer indicating how many bytes should be subtracted from the
3937   this or result pointer when this function is called.  */
3938#define THUNK_FIXED_OFFSET(DECL) \
3939  (DECL_LANG_SPECIFIC (THUNK_FUNCTION_CHECK (DECL))->u.fn.u5.fixed_offset)
3940
3941/* A tree indicating how to perform the virtual adjustment. For a this
3942   adjusting thunk it is the number of bytes to be added to the vtable
3943   to find the vcall offset. For a result adjusting thunk, it is the
3944   binfo of the relevant virtual base.  If NULL, then there is no
3945   virtual adjust.  (The vptr is always located at offset zero from
3946   the this or result pointer.)  (If the covariant type is within the
3947   class hierarchy being laid out, the vbase index is not yet known
3948   at the point we need to create the thunks, hence the need to use
3949   binfos.)  */
3950
3951#define THUNK_VIRTUAL_OFFSET(DECL) \
3952  (LANG_DECL_U2_CHECK (FUNCTION_DECL_CHECK (DECL), 0)->access)
3953
3954/* A thunk which is equivalent to another thunk.  */
3955#define THUNK_ALIAS(DECL) \
3956  (DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (DECL))->u.min.template_info)
3957
3958/* For thunk NODE, this is the FUNCTION_DECL thunked to.  It is
3959   possible for the target to be a thunk too.  */
3960#define THUNK_TARGET(NODE)                              \
3961  (LANG_DECL_FN_CHECK (NODE)->befriending_classes)
3962
3963/* True for a SCOPE_REF iff the "template" keyword was used to
3964   indicate that the qualified name denotes a template.  */
3965#define QUALIFIED_NAME_IS_TEMPLATE(NODE) \
3966  (TREE_LANG_FLAG_1 (SCOPE_REF_CHECK (NODE)))
3967
3968/* True for an OMP_ATOMIC that has dependent parameters.  These are stored
3969   as an expr in operand 1, and integer_zero_node in operand 0.  */
3970#define OMP_ATOMIC_DEPENDENT_P(NODE) \
3971  (TREE_CODE (TREE_OPERAND (OMP_ATOMIC_CHECK (NODE), 0)) == INTEGER_CST)
3972
3973/* Used while gimplifying continue statements bound to OMP_FOR nodes.  */
3974#define OMP_FOR_GIMPLIFYING_P(NODE) \
3975  (TREE_LANG_FLAG_0 (OMP_FOR_CHECK (NODE)))
3976
3977/* A language-specific token attached to the OpenMP data clauses to
3978   hold code (or code fragments) related to ctors, dtors, and op=.
3979   See semantics.c for details.  */
3980#define CP_OMP_CLAUSE_INFO(NODE) \
3981  TREE_TYPE (OMP_CLAUSE_RANGE_CHECK (NODE, OMP_CLAUSE_PRIVATE, \
3982                                     OMP_CLAUSE_COPYPRIVATE))
3983
3984/* Nonzero if this transaction expression's body contains statements.  */
3985#define TRANSACTION_EXPR_IS_STMT(NODE) \
3986   TREE_LANG_FLAG_0 (TRANSACTION_EXPR_CHECK (NODE))
3987
3988/* These macros provide convenient access to the various _STMT nodes
3989   created when parsing template declarations.  */
3990#define TRY_STMTS(NODE)         TREE_OPERAND (TRY_BLOCK_CHECK (NODE), 0)
3991#define TRY_HANDLERS(NODE)      TREE_OPERAND (TRY_BLOCK_CHECK (NODE), 1)
3992
3993#define EH_SPEC_STMTS(NODE)     TREE_OPERAND (EH_SPEC_BLOCK_CHECK (NODE), 0)
3994#define EH_SPEC_RAISES(NODE)    TREE_OPERAND (EH_SPEC_BLOCK_CHECK (NODE), 1)
3995
3996#define USING_STMT_NAMESPACE(NODE) TREE_OPERAND (USING_STMT_CHECK (NODE), 0)
3997
3998/* Nonzero if this try block is a function try block.  */
3999#define FN_TRY_BLOCK_P(NODE)    TREE_LANG_FLAG_3 (TRY_BLOCK_CHECK (NODE))
4000#define HANDLER_PARMS(NODE)     TREE_OPERAND (HANDLER_CHECK (NODE), 0)
4001#define HANDLER_BODY(NODE)      TREE_OPERAND (HANDLER_CHECK (NODE), 1)
4002#define HANDLER_TYPE(NODE)      TREE_TYPE (HANDLER_CHECK (NODE))
4003
4004/* CLEANUP_STMT accessors.  The statement(s) covered, the cleanup to run
4005   and the VAR_DECL for which this cleanup exists.  */
4006#define CLEANUP_BODY(NODE)      TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
4007#define CLEANUP_EXPR(NODE)      TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
4008#define CLEANUP_DECL(NODE)      TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 2)
4009
4010/* IF_STMT accessors. These give access to the condition of the if
4011   statement, the then block of the if statement, and the else block
4012   of the if statement if it exists.  */
4013#define IF_COND(NODE)           TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
4014#define THEN_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
4015#define ELSE_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
4016#define IF_SCOPE(NODE)          TREE_OPERAND (IF_STMT_CHECK (NODE), 3)
4017
4018/* WHILE_STMT accessors. These give access to the condition of the
4019   while statement and the body of the while statement, respectively.  */
4020#define WHILE_COND(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
4021#define WHILE_BODY(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
4022
4023/* DO_STMT accessors. These give access to the condition of the do
4024   statement and the body of the do statement, respectively.  */
4025#define DO_COND(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
4026#define DO_BODY(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
4027
4028/* FOR_STMT accessors. These give access to the init statement,
4029   condition, update expression, and body of the for statement,
4030   respectively.  */
4031#define FOR_INIT_STMT(NODE)     TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
4032#define FOR_COND(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
4033#define FOR_EXPR(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
4034#define FOR_BODY(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
4035#define FOR_SCOPE(NODE)         TREE_OPERAND (FOR_STMT_CHECK (NODE), 4)
4036
4037/* RANGE_FOR_STMT accessors. These give access to the declarator,
4038   expression, body, and scope of the statement, respectively.  */
4039#define RANGE_FOR_DECL(NODE)    TREE_OPERAND (RANGE_FOR_STMT_CHECK (NODE), 0)
4040#define RANGE_FOR_EXPR(NODE)    TREE_OPERAND (RANGE_FOR_STMT_CHECK (NODE), 1)
4041#define RANGE_FOR_BODY(NODE)    TREE_OPERAND (RANGE_FOR_STMT_CHECK (NODE), 2)
4042#define RANGE_FOR_SCOPE(NODE)   TREE_OPERAND (RANGE_FOR_STMT_CHECK (NODE), 3)
4043
4044#define SWITCH_STMT_COND(NODE)  TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
4045#define SWITCH_STMT_BODY(NODE)  TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
4046#define SWITCH_STMT_TYPE(NODE)  TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
4047#define SWITCH_STMT_SCOPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 3)
4048
4049/* STMT_EXPR accessor.  */
4050#define STMT_EXPR_STMT(NODE)    TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
4051
4052/* EXPR_STMT accessor. This gives the expression associated with an
4053   expression statement.  */
4054#define EXPR_STMT_EXPR(NODE)    TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
4055
4056/* True if this TARGET_EXPR was created by build_cplus_new, and so we can
4057   discard it if it isn't useful.  */
4058#define TARGET_EXPR_IMPLICIT_P(NODE) \
4059  TREE_LANG_FLAG_0 (TARGET_EXPR_CHECK (NODE))
4060
4061/* True if this TARGET_EXPR is the result of list-initialization of a
4062   temporary.  */
4063#define TARGET_EXPR_LIST_INIT_P(NODE) \
4064  TREE_LANG_FLAG_1 (TARGET_EXPR_CHECK (NODE))
4065
4066/* True if this TARGET_EXPR expresses direct-initialization of an object
4067   to be named later.  */
4068#define TARGET_EXPR_DIRECT_INIT_P(NODE) \
4069  TREE_LANG_FLAG_2 (TARGET_EXPR_CHECK (NODE))
4070
4071/* True if EXPR expresses direct-initialization of a TYPE.  */
4072#define DIRECT_INIT_EXPR_P(TYPE,EXPR)                                   \
4073  (TREE_CODE (EXPR) == TARGET_EXPR && TREE_LANG_FLAG_2 (EXPR)           \
4074   && same_type_ignoring_top_level_qualifiers_p (TYPE, TREE_TYPE (EXPR)))
4075
4076/* True if this CONVERT_EXPR is for a conversion to virtual base in
4077   an NSDMI, and should be re-evaluated when used in a constructor.  */
4078#define CONVERT_EXPR_VBASE_PATH(NODE) \
4079  TREE_LANG_FLAG_0 (CONVERT_EXPR_CHECK (NODE))
4080
4081/* True if SIZEOF_EXPR argument is type.  */
4082#define SIZEOF_EXPR_TYPE_P(NODE) \
4083  TREE_LANG_FLAG_0 (SIZEOF_EXPR_CHECK (NODE))
4084
4085/* An enumeration of the kind of tags that C++ accepts.  */
4086enum tag_types {
4087  none_type = 0, /* Not a tag type.  */
4088  record_type,   /* "struct" types.  */
4089  class_type,    /* "class" types.  */
4090  union_type,    /* "union" types.  */
4091  enum_type,     /* "enum" types.  */
4092  typename_type  /* "typename" types.  */
4093};
4094
4095/* The various kinds of lvalues we distinguish.  */
4096enum cp_lvalue_kind_flags {
4097  clk_none = 0,     /* Things that are not an lvalue.  */
4098  clk_ordinary = 1, /* An ordinary lvalue.  */
4099  clk_rvalueref = 2,/* An xvalue (rvalue formed using an rvalue reference) */
4100  clk_class = 4,    /* A prvalue of class-type.  */
4101  clk_bitfield = 8, /* An lvalue for a bit-field.  */
4102  clk_packed = 16   /* An lvalue for a packed field.  */
4103};
4104
4105/* This type is used for parameters and variables which hold
4106   combinations of the flags in enum cp_lvalue_kind_flags.  */
4107typedef int cp_lvalue_kind;
4108
4109/* Various kinds of template specialization, instantiation, etc.  */
4110typedef enum tmpl_spec_kind {
4111  tsk_none,                /* Not a template at all.  */
4112  tsk_invalid_member_spec, /* An explicit member template
4113                              specialization, but the enclosing
4114                              classes have not all been explicitly
4115                              specialized.  */
4116  tsk_invalid_expl_inst,   /* An explicit instantiation containing
4117                              template parameter lists.  */
4118  tsk_excessive_parms,     /* A template declaration with too many
4119                              template parameter lists.  */
4120  tsk_insufficient_parms,  /* A template declaration with too few
4121                              parameter lists.  */
4122  tsk_template,            /* A template declaration.  */
4123  tsk_expl_spec,           /* An explicit specialization.  */
4124  tsk_expl_inst            /* An explicit instantiation.  */
4125} tmpl_spec_kind;
4126
4127/* The various kinds of access.  BINFO_ACCESS depends on these being
4128   two bit quantities.  The numerical values are important; they are
4129   used to initialize RTTI data structures, so changing them changes
4130   the ABI.  */
4131typedef enum access_kind {
4132  ak_none = 0,             /* Inaccessible.  */
4133  ak_public = 1,           /* Accessible, as a `public' thing.  */
4134  ak_protected = 2,        /* Accessible, as a `protected' thing.  */
4135  ak_private = 3           /* Accessible, as a `private' thing.  */
4136} access_kind;
4137
4138/* The various kinds of special functions.  If you add to this list,
4139   you should update special_function_p as well.  */
4140typedef enum special_function_kind {
4141  sfk_none = 0,            /* Not a special function.  This enumeral
4142                              must have value zero; see
4143                              special_function_p.  */
4144  sfk_constructor,         /* A constructor.  */
4145  sfk_copy_constructor,    /* A copy constructor.  */
4146  sfk_move_constructor,    /* A move constructor.  */
4147  sfk_copy_assignment,     /* A copy assignment operator.  */
4148  sfk_move_assignment,     /* A move assignment operator.  */
4149  sfk_destructor,          /* A destructor.  */
4150  sfk_complete_destructor, /* A destructor for complete objects.  */
4151  sfk_base_destructor,     /* A destructor for base subobjects.  */
4152  sfk_deleting_destructor, /* A destructor for complete objects that
4153                              deletes the object after it has been
4154                              destroyed.  */
4155  sfk_conversion,          /* A conversion operator.  */
4156  sfk_inheriting_constructor /* An inheriting constructor */
4157} special_function_kind;
4158
4159/* The various kinds of linkage.  From [basic.link],
4160
4161      A name is said to have linkage when it might denote the same
4162      object, reference, function, type, template, namespace or value
4163      as a name introduced in another scope:
4164
4165      -- When a name has external linkage, the entity it denotes can
4166         be referred to from scopes of other translation units or from
4167         other scopes of the same translation unit.
4168
4169      -- When a name has internal linkage, the entity it denotes can
4170         be referred to by names from other scopes in the same
4171         translation unit.
4172
4173      -- When a name has no linkage, the entity it denotes cannot be
4174         referred to by names from other scopes.  */
4175
4176typedef enum linkage_kind {
4177  lk_none,                      /* No linkage.  */
4178  lk_internal,                  /* Internal linkage.  */
4179  lk_external                   /* External linkage.  */
4180} linkage_kind;
4181
4182typedef enum duration_kind {
4183  dk_static,
4184  dk_thread,
4185  dk_auto,
4186  dk_dynamic
4187} duration_kind;
4188
4189/* Bitmask flags to control type substitution.  */
4190enum tsubst_flags {
4191  tf_none = 0,                   /* nothing special */
4192  tf_error = 1 << 0,             /* give error messages  */
4193  tf_warning = 1 << 1,           /* give warnings too  */
4194  tf_ignore_bad_quals = 1 << 2,  /* ignore bad cvr qualifiers */
4195  tf_keep_type_decl = 1 << 3,    /* retain typedef type decls
4196                                    (make_typename_type use) */
4197  tf_ptrmem_ok = 1 << 4,         /* pointers to member ok (internal
4198                                    instantiate_type use) */
4199  tf_user = 1 << 5,              /* found template must be a user template
4200                                    (lookup_template_class use) */
4201  tf_conv = 1 << 6,              /* We are determining what kind of
4202                                    conversion might be permissible,
4203                                    not actually performing the
4204                                    conversion.  */
4205  tf_decltype = 1 << 7,          /* We are the operand of decltype.
4206                                    Used to implement the special rules
4207                                    for calls in decltype (5.2.2/11).  */
4208  tf_partial = 1 << 8,           /* Doing initial explicit argument
4209                                    substitution in fn_type_unification.  */
4210  /* Convenient substitution flags combinations.  */
4211  tf_warning_or_error = tf_warning | tf_error
4212};
4213
4214/* This type is used for parameters and variables which hold
4215   combinations of the flags in enum tsubst_flags.  */
4216typedef int tsubst_flags_t;
4217
4218/* The kind of checking we can do looking in a class hierarchy.  */
4219enum base_access_flags {
4220  ba_any = 0,  /* Do not check access, allow an ambiguous base,
4221                      prefer a non-virtual base */
4222  ba_unique = 1 << 0,  /* Must be a unique base.  */
4223  ba_check_bit = 1 << 1,   /* Check access.  */
4224  ba_check = ba_unique | ba_check_bit,
4225  ba_ignore_scope = 1 << 2 /* Ignore access allowed by local scope.  */
4226};
4227
4228/* This type is used for parameters and variables which hold
4229   combinations of the flags in enum base_access_flags.  */
4230typedef int base_access;
4231
4232/* The various kinds of access check during parsing.  */
4233typedef enum deferring_kind {
4234  dk_no_deferred = 0, /* Check access immediately */
4235  dk_deferred = 1,    /* Deferred check */
4236  dk_no_check = 2     /* No access check */
4237} deferring_kind;
4238
4239/* The kind of base we can find, looking in a class hierarchy.
4240   Values <0 indicate we failed.  */
4241typedef enum base_kind {
4242  bk_inaccessible = -3,   /* The base is inaccessible */
4243  bk_ambig = -2,          /* The base is ambiguous */
4244  bk_not_base = -1,       /* It is not a base */
4245  bk_same_type = 0,       /* It is the same type */
4246  bk_proper_base = 1,     /* It is a proper base */
4247  bk_via_virtual = 2      /* It is a proper base, but via a virtual
4248                             path. This might not be the canonical
4249                             binfo.  */
4250} base_kind;
4251
4252/* Node for "pointer to (virtual) function".
4253   This may be distinct from ptr_type_node so gdb can distinguish them.  */
4254#define vfunc_ptr_type_node  vtable_entry_type
4255
4256
4257/* For building calls to `delete'.  */
4258extern GTY(()) tree integer_two_node;
4259
4260/* The number of function bodies which we are currently processing.
4261   (Zero if we are at namespace scope, one inside the body of a
4262   function, two inside the body of a function in a local class, etc.)  */
4263extern int function_depth;
4264
4265/* Nonzero if we are inside eq_specializations, which affects comparison of
4266   PARM_DECLs in cp_tree_equal.  */
4267extern int comparing_specializations;
4268
4269/* In parser.c.  */
4270
4271/* Nonzero if we are parsing an unevaluated operand: an operand to
4272   sizeof, typeof, or alignof.  This is a count since operands to
4273   sizeof can be nested.  */
4274
4275extern int cp_unevaluated_operand;
4276extern tree cp_convert_range_for (tree, tree, tree);
4277
4278/* in pt.c  */
4279
4280/* These values are used for the `STRICT' parameter to type_unification and
4281   fn_type_unification.  Their meanings are described with the
4282   documentation for fn_type_unification.  */
4283
4284typedef enum unification_kind_t {
4285  DEDUCE_CALL,
4286  DEDUCE_CONV,
4287  DEDUCE_EXACT
4288} unification_kind_t;
4289
4290/* in class.c */
4291
4292extern int current_class_depth;
4293
4294/* An array of all local classes present in this translation unit, in
4295   declaration order.  */
4296extern GTY(()) vec<tree, va_gc> *local_classes;
4297
4298/* Here's where we control how name mangling takes place.  */
4299
4300/* Cannot use '$' up front, because this confuses gdb
4301   (names beginning with '$' are gdb-local identifiers).
4302
4303   Note that all forms in which the '$' is significant are long enough
4304   for direct indexing (meaning that if we know there is a '$'
4305   at a particular location, we can index into the string at
4306   any other location that provides distinguishing characters).  */
4307
4308/* Define NO_DOT_IN_LABEL in your favorite tm file if your assembler
4309   doesn't allow '.' in symbol names.  */
4310#ifndef NO_DOT_IN_LABEL
4311
4312#define JOINER '.'
4313
4314#define AUTO_TEMP_NAME "_.tmp_"
4315#define VFIELD_BASE ".vf"
4316#define VFIELD_NAME "_vptr."
4317#define VFIELD_NAME_FORMAT "_vptr.%s"
4318
4319#define ANON_AGGRNAME_FORMAT "._%d"
4320
4321#else /* NO_DOT_IN_LABEL */
4322
4323#ifndef NO_DOLLAR_IN_LABEL
4324
4325#define JOINER '$'
4326
4327#define AUTO_TEMP_NAME "_$tmp_"
4328#define VFIELD_BASE "$vf"
4329#define VFIELD_NAME "_vptr$"
4330#define VFIELD_NAME_FORMAT "_vptr$%s"
4331#define ANON_AGGRNAME_FORMAT "$_%d"
4332
4333#else /* NO_DOLLAR_IN_LABEL */
4334
4335#define AUTO_TEMP_NAME "__tmp_"
4336#define TEMP_NAME_P(ID_NODE) \
4337  (!strncmp (IDENTIFIER_POINTER (ID_NODE), AUTO_TEMP_NAME, \
4338             sizeof (AUTO_TEMP_NAME) - 1))
4339#define VTABLE_NAME "__vt_"
4340#define VTABLE_NAME_P(ID_NODE) \
4341  (!strncmp (IDENTIFIER_POINTER (ID_NODE), VTABLE_NAME, \
4342             sizeof (VTABLE_NAME) - 1))
4343#define VFIELD_BASE "__vfb"
4344#define VFIELD_NAME "__vptr_"
4345#define VFIELD_NAME_P(ID_NODE) \
4346  (!strncmp (IDENTIFIER_POINTER (ID_NODE), VFIELD_NAME, \
4347            sizeof (VFIELD_NAME) - 1))
4348#define VFIELD_NAME_FORMAT "__vptr_%s"
4349
4350#define ANON_AGGRNAME_PREFIX "__anon_"
4351#define ANON_AGGRNAME_P(ID_NODE) \
4352  (!strncmp (IDENTIFIER_POINTER (ID_NODE), ANON_AGGRNAME_PREFIX, \
4353             sizeof (ANON_AGGRNAME_PREFIX) - 1))
4354#define ANON_AGGRNAME_FORMAT "__anon_%d"
4355
4356#endif  /* NO_DOLLAR_IN_LABEL */
4357#endif  /* NO_DOT_IN_LABEL */
4358
4359#define THIS_NAME "this"
4360
4361#define IN_CHARGE_NAME "__in_chrg"
4362
4363#define VTBL_PTR_TYPE           "__vtbl_ptr_type"
4364#define VTABLE_DELTA_NAME       "__delta"
4365#define VTABLE_PFN_NAME         "__pfn"
4366
4367#define LAMBDANAME_PREFIX "__lambda"
4368#define LAMBDANAME_FORMAT LAMBDANAME_PREFIX "%d"
4369
4370#define UDLIT_OP_ANSI_PREFIX "operator\"\" "
4371#define UDLIT_OP_ANSI_FORMAT UDLIT_OP_ANSI_PREFIX "%s"
4372#define UDLIT_OP_MANGLED_PREFIX "li"
4373#define UDLIT_OP_MANGLED_FORMAT UDLIT_OP_MANGLED_PREFIX "%s"
4374#define UDLIT_OPER_P(ID_NODE) \
4375  (!strncmp (IDENTIFIER_POINTER (ID_NODE), \
4376             UDLIT_OP_ANSI_PREFIX, \
4377             sizeof (UDLIT_OP_ANSI_PREFIX) - 1))
4378#define UDLIT_OP_SUFFIX(ID_NODE) \
4379  (IDENTIFIER_POINTER (ID_NODE) + sizeof (UDLIT_OP_ANSI_PREFIX) - 1)
4380
4381#if !defined(NO_DOLLAR_IN_LABEL) || !defined(NO_DOT_IN_LABEL)
4382
4383#define VTABLE_NAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[1] == 'v' \
4384  && IDENTIFIER_POINTER (ID_NODE)[2] == 't' \
4385  && IDENTIFIER_POINTER (ID_NODE)[3] == JOINER)
4386
4387#define TEMP_NAME_P(ID_NODE) \
4388  (!strncmp (IDENTIFIER_POINTER (ID_NODE), AUTO_TEMP_NAME, sizeof (AUTO_TEMP_NAME)-1))
4389#define VFIELD_NAME_P(ID_NODE) \
4390  (!strncmp (IDENTIFIER_POINTER (ID_NODE), VFIELD_NAME, sizeof(VFIELD_NAME)-1))
4391
4392/* For anonymous aggregate types, we need some sort of name to
4393   hold on to.  In practice, this should not appear, but it should
4394   not be harmful if it does.  */
4395#define ANON_AGGRNAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[0] == JOINER \
4396                                  && IDENTIFIER_POINTER (ID_NODE)[1] == '_')
4397#endif /* !defined(NO_DOLLAR_IN_LABEL) || !defined(NO_DOT_IN_LABEL) */
4398
4399
4400/* Nonzero if we're done parsing and into end-of-file activities.  */
4401
4402extern int at_eof;
4403
4404/* A list of namespace-scope objects which have constructors or
4405   destructors which reside in the global scope.  The decl is stored
4406   in the TREE_VALUE slot and the initializer is stored in the
4407   TREE_PURPOSE slot.  */
4408extern GTY(()) tree static_aggregates;
4409/* Likewise, for thread local storage.  */
4410extern GTY(()) tree tls_aggregates;
4411
4412enum overload_flags { NO_SPECIAL = 0, DTOR_FLAG, TYPENAME_FLAG };
4413
4414/* These are uses as bits in flags passed to various functions to
4415   control their behavior.  Despite the LOOKUP_ prefix, many of these
4416   do not control name lookup.  ??? Functions using these flags should
4417   probably be modified to accept explicit boolean flags for the
4418   behaviors relevant to them.  */
4419/* Check for access violations.  */
4420#define LOOKUP_PROTECT (1 << 0)
4421#define LOOKUP_NORMAL (LOOKUP_PROTECT)
4422/* Even if the function found by lookup is a virtual function, it
4423   should be called directly.  */
4424#define LOOKUP_NONVIRTUAL (1 << 1)
4425/* Non-converting (i.e., "explicit") constructors are not tried.  This flag
4426   indicates that we are not performing direct-initialization.  */
4427#define LOOKUP_ONLYCONVERTING (1 << 2)
4428#define LOOKUP_IMPLICIT (LOOKUP_NORMAL | LOOKUP_ONLYCONVERTING)
4429/* If a temporary is created, it should be created so that it lives
4430   as long as the current variable bindings; otherwise it only lives
4431   until the end of the complete-expression.  It also forces
4432   direct-initialization in cases where other parts of the compiler
4433   have already generated a temporary, such as reference
4434   initialization and the catch parameter.  */
4435#define DIRECT_BIND (1 << 3)
4436/* We're performing a user-defined conversion, so more user-defined
4437   conversions are not permitted (only built-in conversions).  */
4438#define LOOKUP_NO_CONVERSION (1 << 4)
4439/* The user has explicitly called a destructor.  (Therefore, we do
4440   not need to check that the object is non-NULL before calling the
4441   destructor.)  */
4442#define LOOKUP_DESTRUCTOR (1 << 5)
4443/* Do not permit references to bind to temporaries.  */
4444#define LOOKUP_NO_TEMP_BIND (1 << 6)
4445/* Do not accept objects, and possibly namespaces.  */
4446#define LOOKUP_PREFER_TYPES (1 << 7)
4447/* Do not accept objects, and possibly types.   */
4448#define LOOKUP_PREFER_NAMESPACES (1 << 8)
4449/* Accept types or namespaces.  */
4450#define LOOKUP_PREFER_BOTH (LOOKUP_PREFER_TYPES | LOOKUP_PREFER_NAMESPACES)
4451/* Return friend declarations and un-declared builtin functions.
4452   (Normally, these entities are registered in the symbol table, but
4453   not found by lookup.)  */
4454#define LOOKUP_HIDDEN (LOOKUP_PREFER_NAMESPACES << 1)
4455/* Prefer that the lvalue be treated as an rvalue.  */
4456#define LOOKUP_PREFER_RVALUE (LOOKUP_HIDDEN << 1)
4457/* We're inside an init-list, so narrowing conversions are ill-formed.  */
4458#define LOOKUP_NO_NARROWING (LOOKUP_PREFER_RVALUE << 1)
4459/* We're looking up a constructor for list-initialization.  */
4460#define LOOKUP_LIST_INIT_CTOR (LOOKUP_NO_NARROWING << 1)
4461/* This is the first parameter of a copy constructor.  */
4462#define LOOKUP_COPY_PARM (LOOKUP_LIST_INIT_CTOR << 1)
4463/* We only want to consider list constructors.  */
4464#define LOOKUP_LIST_ONLY (LOOKUP_COPY_PARM << 1)
4465/* Return after determining which function to call and checking access.
4466   Used by sythesized_method_walk to determine which functions will
4467   be called to initialize subobjects, in order to determine exception
4468   specification and possible implicit delete.
4469   This is kind of a hack, but exiting early avoids problems with trying
4470   to perform argument conversions when the class isn't complete yet.  */
4471#define LOOKUP_SPECULATIVE (LOOKUP_LIST_ONLY << 1)
4472/* Used by calls from defaulted functions to limit the overload set to avoid
4473   cycles trying to declare them (core issue 1092).  */
4474#define LOOKUP_DEFAULTED (LOOKUP_SPECULATIVE << 1)
4475/* Used in calls to store_init_value to suppress its usual call to
4476   digest_init.  */
4477#define LOOKUP_ALREADY_DIGESTED (LOOKUP_DEFAULTED << 1)
4478/* An instantiation with explicit template arguments.  */
4479#define LOOKUP_EXPLICIT_TMPL_ARGS (LOOKUP_ALREADY_DIGESTED << 1)
4480/* Like LOOKUP_NO_TEMP_BIND, but also prevent binding to xvalues.  */
4481#define LOOKUP_NO_RVAL_BIND (LOOKUP_EXPLICIT_TMPL_ARGS << 1)
4482
4483#define LOOKUP_NAMESPACES_ONLY(F)  \
4484  (((F) & LOOKUP_PREFER_NAMESPACES) && !((F) & LOOKUP_PREFER_TYPES))
4485#define LOOKUP_TYPES_ONLY(F)  \
4486  (!((F) & LOOKUP_PREFER_NAMESPACES) && ((F) & LOOKUP_PREFER_TYPES))
4487#define LOOKUP_QUALIFIERS_ONLY(F)     ((F) & LOOKUP_PREFER_BOTH)
4488
4489
4490/* These flags are used by the conversion code.
4491   CONV_IMPLICIT   :  Perform implicit conversions (standard and user-defined).
4492   CONV_STATIC     :  Perform the explicit conversions for static_cast.
4493   CONV_CONST      :  Perform the explicit conversions for const_cast.
4494   CONV_REINTERPRET:  Perform the explicit conversions for reinterpret_cast.
4495   CONV_PRIVATE    :  Perform upcasts to private bases.
4496   CONV_FORCE_TEMP :  Require a new temporary when converting to the same
4497                      aggregate type.  */
4498
4499#define CONV_IMPLICIT    1
4500#define CONV_STATIC      2
4501#define CONV_CONST       4
4502#define CONV_REINTERPRET 8
4503#define CONV_PRIVATE     16
4504/* #define CONV_NONCONVERTING 32 */
4505#define CONV_FORCE_TEMP  64
4506#define CONV_OLD_CONVERT (CONV_IMPLICIT | CONV_STATIC | CONV_CONST \
4507                          | CONV_REINTERPRET)
4508#define CONV_C_CAST      (CONV_IMPLICIT | CONV_STATIC | CONV_CONST \
4509                          | CONV_REINTERPRET | CONV_PRIVATE | CONV_FORCE_TEMP)
4510
4511/* Used by build_expr_type_conversion to indicate which types are
4512   acceptable as arguments to the expression under consideration.  */
4513
4514#define WANT_INT        1 /* integer types, including bool */
4515#define WANT_FLOAT      2 /* floating point types */
4516#define WANT_ENUM       4 /* enumerated types */
4517#define WANT_POINTER    8 /* pointer types */
4518#define WANT_NULL      16 /* null pointer constant */
4519#define WANT_VECTOR_OR_COMPLEX 32 /* vector or complex types */
4520#define WANT_ARITH      (WANT_INT | WANT_FLOAT | WANT_VECTOR_OR_COMPLEX)
4521
4522/* Used with comptypes, and related functions, to guide type
4523   comparison.  */
4524
4525#define COMPARE_STRICT        0 /* Just check if the types are the
4526                                   same.  */
4527#define COMPARE_BASE          1 /* Check to see if the second type is
4528                                   derived from the first.  */
4529#define COMPARE_DERIVED       2 /* Like COMPARE_BASE, but in
4530                                   reverse.  */
4531#define COMPARE_REDECLARATION 4 /* The comparison is being done when
4532                                   another declaration of an existing
4533                                   entity is seen.  */
4534#define COMPARE_STRUCTURAL    8 /* The comparison is intended to be
4535                                   structural. The actual comparison
4536                                   will be identical to
4537                                   COMPARE_STRICT.  */
4538
4539/* Used with push_overloaded_decl.  */
4540#define PUSH_GLOBAL          0  /* Push the DECL into namespace scope,
4541                                   regardless of the current scope.  */
4542#define PUSH_LOCAL           1  /* Push the DECL into the current
4543                                   scope.  */
4544#define PUSH_USING           2  /* We are pushing this DECL as the
4545                                   result of a using declaration.  */
4546
4547/* Used with start function.  */
4548#define SF_DEFAULT           0  /* No flags.  */
4549#define SF_PRE_PARSED        1  /* The function declaration has
4550                                   already been parsed.  */
4551#define SF_INCLASS_INLINE    2  /* The function is an inline, defined
4552                                   in the class body.  */
4553
4554/* Used with start_decl's initialized parameter.  */
4555#define SD_UNINITIALIZED     0
4556#define SD_INITIALIZED       1
4557#define SD_DEFAULTED         2
4558#define SD_DELETED           3
4559
4560/* Returns nonzero iff TYPE1 and TYPE2 are the same type, or if TYPE2
4561   is derived from TYPE1, or if TYPE2 is a pointer (reference) to a
4562   class derived from the type pointed to (referred to) by TYPE1.  */
4563#define same_or_base_type_p(TYPE1, TYPE2) \
4564  comptypes ((TYPE1), (TYPE2), COMPARE_BASE)
4565
4566/* These macros are used to access a TEMPLATE_PARM_INDEX.  */
4567#define TEMPLATE_PARM_INDEX_CAST(NODE) \
4568        ((template_parm_index*)TEMPLATE_PARM_INDEX_CHECK (NODE))
4569#define TEMPLATE_PARM_IDX(NODE) (TEMPLATE_PARM_INDEX_CAST (NODE)->index)
4570#define TEMPLATE_PARM_LEVEL(NODE) (TEMPLATE_PARM_INDEX_CAST (NODE)->level)
4571#define TEMPLATE_PARM_DESCENDANTS(NODE) (TREE_CHAIN (NODE))
4572#define TEMPLATE_PARM_ORIG_LEVEL(NODE) (TEMPLATE_PARM_INDEX_CAST (NODE)->orig_level)
4573#define TEMPLATE_PARM_DECL(NODE) (TEMPLATE_PARM_INDEX_CAST (NODE)->decl)
4574#define TEMPLATE_PARM_PARAMETER_PACK(NODE) \
4575  (TREE_LANG_FLAG_0 (TEMPLATE_PARM_INDEX_CHECK (NODE)))
4576
4577/* These macros are for accessing the fields of TEMPLATE_TYPE_PARM,
4578   TEMPLATE_TEMPLATE_PARM and BOUND_TEMPLATE_TEMPLATE_PARM nodes.  */
4579#define TEMPLATE_TYPE_PARM_INDEX(NODE)                                  \
4580  (TYPE_VALUES_RAW (TREE_CHECK3 ((NODE), TEMPLATE_TYPE_PARM,            \
4581                                 TEMPLATE_TEMPLATE_PARM,                \
4582                                 BOUND_TEMPLATE_TEMPLATE_PARM)))
4583#define TEMPLATE_TYPE_IDX(NODE) \
4584  (TEMPLATE_PARM_IDX (TEMPLATE_TYPE_PARM_INDEX (NODE)))
4585#define TEMPLATE_TYPE_LEVEL(NODE) \
4586  (TEMPLATE_PARM_LEVEL (TEMPLATE_TYPE_PARM_INDEX (NODE)))
4587#define TEMPLATE_TYPE_ORIG_LEVEL(NODE) \
4588  (TEMPLATE_PARM_ORIG_LEVEL (TEMPLATE_TYPE_PARM_INDEX (NODE)))
4589#define TEMPLATE_TYPE_DECL(NODE) \
4590  (TEMPLATE_PARM_DECL (TEMPLATE_TYPE_PARM_INDEX (NODE)))
4591#define TEMPLATE_TYPE_PARAMETER_PACK(NODE) \
4592  (TEMPLATE_PARM_PARAMETER_PACK (TEMPLATE_TYPE_PARM_INDEX (NODE)))
4593
4594/* These constants can used as bit flags in the process of tree formatting.
4595
4596   TFF_PLAIN_IDENTIFIER: unqualified part of a name.
4597   TFF_SCOPE: include the class and namespace scope of the name.
4598   TFF_CHASE_TYPEDEF: print the original type-id instead of the typedef-name.
4599   TFF_DECL_SPECIFIERS: print decl-specifiers.
4600   TFF_CLASS_KEY_OR_ENUM: precede a class-type name (resp. enum name) with
4601       a class-key (resp. `enum').
4602   TFF_RETURN_TYPE: include function return type.
4603   TFF_FUNCTION_DEFAULT_ARGUMENTS: include function default parameter values.
4604   TFF_EXCEPTION_SPECIFICATION: show function exception specification.
4605   TFF_TEMPLATE_HEADER: show the template<...> header in a
4606       template-declaration.
4607   TFF_TEMPLATE_NAME: show only template-name.
4608   TFF_EXPR_IN_PARENS: parenthesize expressions.
4609   TFF_NO_FUNCTION_ARGUMENTS: don't show function arguments.
4610   TFF_UNQUALIFIED_NAME: do not print the qualifying scope of the
4611       top-level entity.
4612   TFF_NO_OMIT_DEFAULT_TEMPLATE_ARGUMENTS: do not omit template arguments
4613       identical to their defaults.  */
4614
4615#define TFF_PLAIN_IDENTIFIER                    (0)
4616#define TFF_SCOPE                               (1)
4617#define TFF_CHASE_TYPEDEF                       (1 << 1)
4618#define TFF_DECL_SPECIFIERS                     (1 << 2)
4619#define TFF_CLASS_KEY_OR_ENUM                   (1 << 3)
4620#define TFF_RETURN_TYPE                         (1 << 4)
4621#define TFF_FUNCTION_DEFAULT_ARGUMENTS          (1 << 5)
4622#define TFF_EXCEPTION_SPECIFICATION             (1 << 6)
4623#define TFF_TEMPLATE_HEADER                     (1 << 7)
4624#define TFF_TEMPLATE_NAME                       (1 << 8)
4625#define TFF_EXPR_IN_PARENS                      (1 << 9)
4626#define TFF_NO_FUNCTION_ARGUMENTS               (1 << 10)
4627#define TFF_UNQUALIFIED_NAME                    (1 << 11)
4628#define TFF_NO_OMIT_DEFAULT_TEMPLATE_ARGUMENTS  (1 << 12)
4629
4630/* Returns the TEMPLATE_DECL associated to a TEMPLATE_TEMPLATE_PARM
4631   node.  */
4632#define TEMPLATE_TEMPLATE_PARM_TEMPLATE_DECL(NODE)      \
4633  ((TREE_CODE (NODE) == BOUND_TEMPLATE_TEMPLATE_PARM)   \
4634   ? TYPE_TI_TEMPLATE (NODE)                            \
4635   : TYPE_NAME (NODE))
4636
4637/* in lex.c  */
4638
4639extern void init_reswords (void);
4640
4641typedef struct GTY(()) operator_name_info_t {
4642  /* The IDENTIFIER_NODE for the operator.  */
4643  tree identifier;
4644  /* The name of the operator.  */
4645  const char *name;
4646  /* The mangled name of the operator.  */
4647  const char *mangled_name;
4648  /* The arity of the operator.  */
4649  int arity;
4650} operator_name_info_t;
4651
4652/* A mapping from tree codes to operator name information.  */
4653extern GTY(()) operator_name_info_t operator_name_info
4654  [(int) MAX_TREE_CODES];
4655/* Similar, but for assignment operators.  */
4656extern GTY(()) operator_name_info_t assignment_operator_name_info
4657  [(int) MAX_TREE_CODES];
4658
4659/* A type-qualifier, or bitmask therefore, using the TYPE_QUAL
4660   constants.  */
4661
4662typedef int cp_cv_quals;
4663
4664/* Non-static member functions have an optional virt-specifier-seq.
4665   There is a VIRT_SPEC value for each virt-specifier.
4666   They can be combined by bitwise-or to form the complete set of
4667   virt-specifiers for a member function.  */
4668enum virt_specifier
4669  {
4670    VIRT_SPEC_UNSPECIFIED = 0x0,
4671    VIRT_SPEC_FINAL       = 0x1,
4672    VIRT_SPEC_OVERRIDE    = 0x2
4673  };
4674
4675/* A type-qualifier, or bitmask therefore, using the VIRT_SPEC
4676   constants.  */
4677
4678typedef int cp_virt_specifiers;
4679
4680/* Wherever there is a function-cv-qual, there could also be a ref-qualifier:
4681
4682   [dcl.fct]
4683   The return type, the parameter-type-list, the ref-qualifier, and
4684   the cv-qualifier-seq, but not the default arguments or the exception
4685   specification, are part of the function type.
4686
4687   REF_QUAL_NONE    Ordinary member function with no ref-qualifier
4688   REF_QUAL_LVALUE  Member function with the &-ref-qualifier
4689   REF_QUAL_RVALUE  Member function with the &&-ref-qualifier */
4690
4691enum cp_ref_qualifier {
4692  REF_QUAL_NONE = 0,
4693  REF_QUAL_LVALUE = 1,
4694  REF_QUAL_RVALUE = 2
4695};
4696
4697/* A storage class.  */
4698
4699typedef enum cp_storage_class {
4700  /* sc_none must be zero so that zeroing a cp_decl_specifier_seq
4701     sets the storage_class field to sc_none.  */
4702  sc_none = 0,
4703  sc_auto,
4704  sc_register,
4705  sc_static,
4706  sc_extern,
4707  sc_mutable
4708} cp_storage_class;
4709
4710/* An individual decl-specifier.  This is used to index the array of
4711   locations for the declspecs in struct cp_decl_specifier_seq
4712   below.  */
4713
4714typedef enum cp_decl_spec {
4715  ds_first,
4716  ds_signed = ds_first,
4717  ds_unsigned,
4718  ds_short,
4719  ds_long,
4720  ds_const,
4721  ds_volatile,
4722  ds_restrict,
4723  ds_inline,
4724  ds_virtual,
4725  ds_explicit,
4726  ds_friend,
4727  ds_typedef,
4728  ds_alias,
4729  ds_constexpr,
4730  ds_complex,
4731  ds_thread,
4732  ds_type_spec,
4733  ds_redefined_builtin_type_spec,
4734  ds_attribute,
4735  ds_std_attribute,
4736  ds_storage_class,
4737  ds_long_long,
4738  ds_last /* This enumerator must always be the last one.  */
4739} cp_decl_spec;
4740
4741/* A decl-specifier-seq.  */
4742
4743typedef struct cp_decl_specifier_seq {
4744  /* An array of locations for the declaration sepecifiers, indexed by
4745     enum cp_decl_spec_word.  */
4746  source_location locations[ds_last];
4747  /* The primary type, if any, given by the decl-specifier-seq.
4748     Modifiers, like "short", "const", and "unsigned" are not
4749     reflected here.  This field will be a TYPE, unless a typedef-name
4750     was used, in which case it will be a TYPE_DECL.  */
4751  tree type;
4752  /* The attributes, if any, provided with the specifier sequence.  */
4753  tree attributes;
4754  /* The c++11 attributes that follows the type specifier.  */
4755  tree std_attributes;
4756  /* If non-NULL, a built-in type that the user attempted to redefine
4757     to some other type.  */
4758  tree redefined_builtin_type;
4759  /* The storage class specified -- or sc_none if no storage class was
4760     explicitly specified.  */
4761  cp_storage_class storage_class;
4762  /* True iff TYPE_SPEC defines a class or enum.  */
4763  BOOL_BITFIELD type_definition_p : 1;
4764  /* True iff multiple types were (erroneously) specified for this
4765     decl-specifier-seq.  */
4766  BOOL_BITFIELD multiple_types_p : 1;
4767  /* True iff multiple storage classes were (erroneously) specified
4768     for this decl-specifier-seq or a combination of a storage class
4769     with a typedef specifier.  */
4770  BOOL_BITFIELD conflicting_specifiers_p : 1;
4771  /* True iff at least one decl-specifier was found.  */
4772  BOOL_BITFIELD any_specifiers_p : 1;
4773  /* True iff at least one type-specifier was found.  */
4774  BOOL_BITFIELD any_type_specifiers_p : 1;
4775  /* True iff "int" was explicitly provided.  */
4776  BOOL_BITFIELD explicit_int_p : 1;
4777  /* True iff "__int128" was explicitly provided.  */
4778  BOOL_BITFIELD explicit_int128_p : 1;
4779  /* True iff "char" was explicitly provided.  */
4780  BOOL_BITFIELD explicit_char_p : 1;
4781  /* True iff ds_thread is set for __thread, not thread_local.  */
4782  BOOL_BITFIELD gnu_thread_keyword_p : 1;
4783} cp_decl_specifier_seq;
4784
4785/* The various kinds of declarators.  */
4786
4787typedef enum cp_declarator_kind {
4788  cdk_id,
4789  cdk_function,
4790  cdk_array,
4791  cdk_pointer,
4792  cdk_reference,
4793  cdk_ptrmem,
4794  cdk_error
4795} cp_declarator_kind;
4796
4797/* A declarator.  */
4798
4799typedef struct cp_declarator cp_declarator;
4800
4801typedef struct cp_parameter_declarator cp_parameter_declarator;
4802
4803/* A parameter, before it has been semantically analyzed.  */
4804struct cp_parameter_declarator {
4805  /* The next parameter, or NULL_TREE if none.  */
4806  cp_parameter_declarator *next;
4807  /* The decl-specifiers-seq for the parameter.  */
4808  cp_decl_specifier_seq decl_specifiers;
4809  /* The declarator for the parameter.  */
4810  cp_declarator *declarator;
4811  /* The default-argument expression, or NULL_TREE, if none.  */
4812  tree default_argument;
4813  /* True iff this is the first parameter in the list and the
4814     parameter sequence ends with an ellipsis.  */
4815  bool ellipsis_p;
4816};
4817
4818/* A declarator.  */
4819struct cp_declarator {
4820  /* The kind of declarator.  */
4821  ENUM_BITFIELD (cp_declarator_kind) kind : 4;
4822  /* Whether we parsed an ellipsis (`...') just before the declarator,
4823     to indicate this is a parameter pack.  */
4824  BOOL_BITFIELD parameter_pack_p : 1;
4825  location_t id_loc; /* Currently only set for cdk_id and cdk_function. */
4826  /* GNU Attributes that apply to this declarator.  If the declarator
4827     is a pointer or a reference, these attribute apply to the type
4828     pointed to.  */
4829  tree attributes;
4830  /* Standard C++11 attributes that apply to this declarator.  If the
4831     declarator is a pointer or a reference, these attributes apply
4832     to the pointer, rather than to the type pointed to.  */
4833  tree std_attributes;
4834  /* For all but cdk_id and cdk_error, the contained declarator.  For
4835     cdk_id and cdk_error, guaranteed to be NULL.  */
4836  cp_declarator *declarator;
4837  union {
4838    /* For identifiers.  */
4839    struct {
4840      /* If non-NULL, the qualifying scope (a NAMESPACE_DECL or
4841         *_TYPE) for this identifier.  */
4842      tree qualifying_scope;
4843      /* The unqualified name of the entity -- an IDENTIFIER_NODE,
4844         BIT_NOT_EXPR, or TEMPLATE_ID_EXPR.  */
4845      tree unqualified_name;
4846      /* If this is the name of a function, what kind of special
4847         function (if any).  */
4848      special_function_kind sfk;
4849    } id;
4850    /* For functions.  */
4851    struct {
4852      /* The parameters to the function as a TREE_LIST of decl/default.  */
4853      tree parameters;
4854      /* The cv-qualifiers for the function.  */
4855      cp_cv_quals qualifiers;
4856      /* The virt-specifiers for the function.  */
4857      cp_virt_specifiers virt_specifiers;
4858      /* The ref-qualifier for the function.  */
4859      cp_ref_qualifier ref_qualifier;
4860      /* The exception-specification for the function.  */
4861      tree exception_specification;
4862      /* The late-specified return type, if any.  */
4863      tree late_return_type;
4864    } function;
4865    /* For arrays.  */
4866    struct {
4867      /* The bounds to the array.  */
4868      tree bounds;
4869    } array;
4870    /* For cdk_pointer and cdk_ptrmem.  */
4871    struct {
4872      /* The cv-qualifiers for the pointer.  */
4873      cp_cv_quals qualifiers;
4874      /* For cdk_ptrmem, the class type containing the member.  */
4875      tree class_type;
4876    } pointer;
4877    /* For cdk_reference */
4878    struct {
4879      /* The cv-qualifiers for the reference.  These qualifiers are
4880         only used to diagnose ill-formed code.  */
4881      cp_cv_quals qualifiers;
4882      /* Whether this is an rvalue reference */
4883      bool rvalue_ref;
4884    } reference;
4885  } u;
4886};
4887
4888/* A level of template instantiation.  */
4889struct GTY((chain_next ("%h.next"))) tinst_level {
4890  /* The immediately deeper level in the chain.  */
4891  struct tinst_level *next;
4892
4893  /* The original node.  Can be either a DECL (for a function or static
4894     data member) or a TYPE (for a class), depending on what we were
4895     asked to instantiate.  */
4896  tree decl;
4897
4898  /* The location where the template is instantiated.  */
4899  location_t locus;
4900
4901  /* errorcount+sorrycount when we pushed this level.  */
4902  int errors;
4903
4904  /* True if the location is in a system header.  */
4905  bool in_system_header_p;
4906};
4907
4908bool decl_spec_seq_has_spec_p (const cp_decl_specifier_seq *, cp_decl_spec);
4909
4910/* Return the type of the `this' parameter of FNTYPE.  */
4911
4912static inline tree
4913type_of_this_parm (const_tree fntype)
4914{
4915  function_args_iterator iter;
4916  gcc_assert (TREE_CODE (fntype) == METHOD_TYPE);
4917  function_args_iter_init (&iter, fntype);
4918  return function_args_iter_cond (&iter);
4919}
4920
4921/* Return the class of the `this' parameter of FNTYPE.  */
4922
4923static inline tree
4924class_of_this_parm (const_tree fntype)
4925{
4926  return TREE_TYPE (type_of_this_parm (fntype));
4927}
4928
4929/* A parameter list indicating for a function with no parameters,
4930   e.g  "int f(void)".  */
4931extern cp_parameter_declarator *no_parameters;
4932
4933/* True if we saw "#pragma GCC java_exceptions".  */
4934extern bool pragma_java_exceptions;
4935
4936/* in call.c */
4937extern bool check_dtor_name                     (tree, tree);
4938
4939extern tree build_conditional_expr              (tree, tree, tree, 
4940                                                 tsubst_flags_t);
4941extern tree build_addr_func                     (tree, tsubst_flags_t);
4942extern void set_flags_from_callee               (tree);
4943extern tree build_call_a                        (tree, int, tree*);
4944extern tree build_call_n                        (tree, int, ...);
4945extern bool null_ptr_cst_p                      (tree);
4946extern bool null_member_pointer_value_p         (tree);
4947extern bool sufficient_parms_p                  (const_tree);
4948extern tree type_decays_to                      (tree);
4949extern tree build_user_type_conversion          (tree, tree, int,
4950                                                 tsubst_flags_t);
4951extern tree build_new_function_call             (tree, vec<tree, va_gc> **, bool, 
4952                                                 tsubst_flags_t);
4953extern tree build_operator_new_call             (tree, vec<tree, va_gc> **, tree *,
4954                                                 tree *, tree, tree *,
4955                                                 tsubst_flags_t);
4956extern tree build_new_method_call               (tree, tree, vec<tree, va_gc> **,
4957                                                 tree, int, tree *,
4958                                                 tsubst_flags_t);
4959extern tree build_special_member_call           (tree, tree, vec<tree, va_gc> **,
4960                                                 tree, int, tsubst_flags_t);
4961extern tree build_new_op                        (location_t, enum tree_code,
4962                                                 int, tree, tree, tree, tree *,
4963                                                 tsubst_flags_t);
4964extern tree build_op_call                       (tree, vec<tree, va_gc> **,
4965                                                 tsubst_flags_t);
4966extern tree build_op_delete_call                (enum tree_code, tree, tree,
4967                                                 bool, tree, tree,
4968                                                 tsubst_flags_t);
4969extern bool can_convert                         (tree, tree, tsubst_flags_t);
4970extern bool can_convert_arg                     (tree, tree, tree, int,
4971                                                 tsubst_flags_t);
4972extern bool can_convert_arg_bad                 (tree, tree, tree, int,
4973                                                 tsubst_flags_t);
4974extern bool enforce_access                      (tree, tree, tree,
4975                                                 tsubst_flags_t);
4976extern void push_defarg_context                 (tree);
4977extern void pop_defarg_context                  (void);
4978extern tree convert_default_arg                 (tree, tree, tree, int,
4979                                                 tsubst_flags_t);
4980extern tree convert_arg_to_ellipsis             (tree, tsubst_flags_t);
4981extern tree build_x_va_arg                      (source_location, tree, tree);
4982extern tree cxx_type_promotes_to                (tree);
4983extern tree type_passed_as                      (tree);
4984extern tree convert_for_arg_passing             (tree, tree, tsubst_flags_t);
4985extern bool is_properly_derived_from            (tree, tree);
4986extern tree initialize_reference                (tree, tree, int,
4987                                                 tsubst_flags_t);
4988extern tree extend_ref_init_temps               (tree, tree, vec<tree, va_gc>**);
4989extern tree make_temporary_var_for_ref_to_temp  (tree, tree);
4990extern bool type_has_extended_temps             (tree);
4991extern tree strip_top_quals                     (tree);
4992extern bool reference_related_p                 (tree, tree);
4993extern tree perform_implicit_conversion         (tree, tree, tsubst_flags_t);
4994extern tree perform_implicit_conversion_flags   (tree, tree, tsubst_flags_t, int);
4995extern tree build_integral_nontype_arg_conv     (tree, tree, tsubst_flags_t);
4996extern tree perform_direct_initialization_if_possible (tree, tree, bool,
4997                                                       tsubst_flags_t);
4998extern tree in_charge_arg_for_name              (tree);
4999extern tree build_cxx_call                      (tree, int, tree *,
5000                                                 tsubst_flags_t);
5001extern bool is_std_init_list                    (tree);
5002extern bool is_list_ctor                        (tree);
5003#ifdef ENABLE_CHECKING
5004extern void validate_conversion_obstack         (void);
5005#endif /* ENABLE_CHECKING */
5006extern void mark_versions_used                  (tree);
5007extern tree get_function_version_dispatcher     (tree);
5008
5009/* in class.c */
5010extern tree build_vfield_ref                    (tree, tree);
5011extern tree build_base_path                     (enum tree_code, tree,
5012                                                 tree, int, tsubst_flags_t);
5013extern tree convert_to_base                     (tree, tree, bool, bool,
5014                                                 tsubst_flags_t);
5015extern tree convert_to_base_statically          (tree, tree);
5016extern tree build_vtbl_ref                      (tree, tree);
5017extern tree build_vfn_ref                       (tree, tree);
5018extern tree get_vtable_decl                     (tree, int);
5019extern void resort_type_method_vec              (void *, void *,
5020                                                 gt_pointer_operator, void *);
5021extern bool add_method                          (tree, tree, tree);
5022extern bool currently_open_class                (tree);
5023extern tree currently_open_derived_class        (tree);
5024extern tree current_nonlambda_class_type        (void);
5025extern tree finish_struct                       (tree, tree);
5026extern void finish_struct_1                     (tree);
5027extern int resolves_to_fixed_type_p             (tree, int *);
5028extern void init_class_processing               (void);
5029extern int is_empty_class                       (tree);
5030extern bool is_really_empty_class               (tree);
5031extern void pushclass                           (tree);
5032extern void popclass                            (void);
5033extern void push_nested_class                   (tree);
5034extern void pop_nested_class                    (void);
5035extern int current_lang_depth                   (void);
5036extern void push_lang_context                   (tree);
5037extern void pop_lang_context                    (void);
5038extern tree instantiate_type                    (tree, tree, tsubst_flags_t);
5039extern void print_class_statistics              (void);
5040extern void build_self_reference                (void);
5041extern int same_signature_p                     (const_tree, const_tree);
5042extern void maybe_add_class_template_decl_list  (tree, tree, int);
5043extern void unreverse_member_declarations       (tree);
5044extern void invalidate_class_lookup_cache       (void);
5045extern void maybe_note_name_used_in_class       (tree, tree);
5046extern void note_name_declared_in_class         (tree, tree);
5047extern tree get_vtbl_decl_for_binfo             (tree);
5048extern void debug_class                         (tree);
5049extern void debug_thunks                        (tree);
5050extern void set_linkage_according_to_type       (tree, tree);
5051extern void determine_key_method                (tree);
5052extern void check_for_override                  (tree, tree);
5053extern void push_class_stack                    (void);
5054extern void pop_class_stack                     (void);
5055extern bool type_has_user_nondefault_constructor (tree);
5056extern tree in_class_defaulted_default_constructor (tree);
5057extern bool user_provided_p                     (tree);
5058extern bool type_has_user_provided_constructor  (tree);
5059extern bool type_has_user_provided_default_constructor (tree);
5060extern tree default_init_uninitialized_part (tree);
5061extern bool trivial_default_constructor_is_constexpr (tree);
5062extern bool type_has_constexpr_default_constructor (tree);
5063extern bool type_has_virtual_destructor         (tree);
5064extern bool type_has_move_constructor           (tree);
5065extern bool type_has_move_assign                (tree);
5066extern bool type_has_user_declared_move_constructor (tree);
5067extern bool type_has_user_declared_move_assign(tree);
5068extern bool type_build_ctor_call                (tree);
5069extern void explain_non_literal_class           (tree);
5070extern void defaulted_late_check                (tree);
5071extern bool defaultable_fn_check                (tree);
5072extern void fixup_type_variants                 (tree);
5073extern void fixup_attribute_variants            (tree);
5074extern tree* decl_cloned_function_p             (const_tree, bool);
5075extern void clone_function_decl                 (tree, int);
5076extern void adjust_clone_args                   (tree);
5077extern void deduce_noexcept_on_destructor       (tree);
5078extern void insert_late_enum_def_into_classtype_sorted_fields (tree, tree);
5079extern bool uniquely_derived_from_p             (tree, tree);
5080extern bool publicly_uniquely_derived_p         (tree, tree);
5081
5082/* in cvt.c */
5083extern tree convert_to_reference                (tree, tree, int, int, tree,
5084                                                 tsubst_flags_t);
5085extern tree convert_from_reference              (tree);
5086extern tree force_rvalue                        (tree, tsubst_flags_t);
5087extern tree ocp_convert                         (tree, tree, int, int,
5088                                                 tsubst_flags_t);
5089extern tree cp_convert                          (tree, tree, tsubst_flags_t);
5090extern tree cp_convert_and_check                (tree, tree, tsubst_flags_t);
5091extern tree cp_fold_convert                     (tree, tree);
5092extern tree convert_to_void                     (tree, impl_conv_void,
5093                                                 tsubst_flags_t);
5094extern tree convert_force                       (tree, tree, int,
5095                                                 tsubst_flags_t);
5096extern tree build_expr_type_conversion          (int, tree, bool);
5097extern tree type_promotes_to                    (tree);
5098extern tree perform_qualification_conversions   (tree, tree);
5099
5100/* in name-lookup.c */
5101extern tree pushdecl                            (tree);
5102extern tree pushdecl_maybe_friend               (tree, bool);
5103extern void maybe_push_cleanup_level            (tree);
5104extern tree pushtag                             (tree, tree, tag_scope);
5105extern tree make_anon_name                      (void);
5106extern tree pushdecl_top_level_maybe_friend     (tree, bool);
5107extern tree pushdecl_top_level_and_finish       (tree, tree);
5108extern tree check_for_out_of_scope_variable     (tree);
5109extern void print_other_binding_stack           (cp_binding_level *);
5110extern tree maybe_push_decl                     (tree);
5111extern tree current_decl_namespace              (void);
5112
5113/* decl.c */
5114extern tree poplevel                            (int, int, int);
5115extern void cxx_init_decl_processing            (void);
5116enum cp_tree_node_structure_enum cp_tree_node_structure
5117                                                (union lang_tree_node *);
5118extern void finish_scope                        (void);
5119extern void push_switch                         (tree);
5120extern void pop_switch                          (void);
5121extern tree make_lambda_name                    (void);
5122extern int decls_match                          (tree, tree);
5123extern tree duplicate_decls                     (tree, tree, bool);
5124extern tree declare_local_label                 (tree);
5125extern tree define_label                        (location_t, tree);
5126extern void check_goto                          (tree);
5127extern bool check_omp_return                    (void);
5128extern tree make_typename_type                  (tree, tree, enum tag_types, tsubst_flags_t);
5129extern tree make_unbound_class_template         (tree, tree, tree, tsubst_flags_t);
5130extern tree build_library_fn_ptr                (const char *, tree);
5131extern tree build_cp_library_fn_ptr             (const char *, tree);
5132extern tree push_library_fn                     (tree, tree, tree);
5133extern tree push_void_library_fn                (tree, tree);
5134extern tree push_throw_library_fn               (tree, tree);
5135extern void warn_misplaced_attr_for_class_type  (source_location location,
5136                                                 tree class_type);
5137extern tree check_tag_decl                      (cp_decl_specifier_seq *, bool);
5138extern tree shadow_tag                          (cp_decl_specifier_seq *);
5139extern tree groktypename                        (cp_decl_specifier_seq *, const cp_declarator *, bool);
5140extern tree start_decl                          (const cp_declarator *, cp_decl_specifier_seq *, int, tree, tree, tree *);
5141extern void start_decl_1                        (tree, bool);
5142extern bool check_array_initializer             (tree, tree, tree);
5143extern void cp_finish_decl                      (tree, tree, bool, tree, int);
5144extern int cp_complete_array_type               (tree *, tree, bool);
5145extern int cp_complete_array_type_or_error      (tree *, tree, bool, tsubst_flags_t);
5146extern tree build_ptrmemfunc_type               (tree);
5147extern tree build_ptrmem_type                   (tree, tree);
5148/* the grokdeclarator prototype is in decl.h */
5149extern tree build_this_parm                     (tree, cp_cv_quals);
5150extern int copy_fn_p                            (const_tree);
5151extern bool move_fn_p                           (const_tree);
5152extern bool move_signature_fn_p                 (const_tree);
5153extern tree get_scope_of_declarator             (const cp_declarator *);
5154extern void grok_special_member_properties      (tree);
5155extern int grok_ctor_properties                 (const_tree, const_tree);
5156extern bool grok_op_properties                  (tree, bool);
5157extern tree xref_tag                            (enum tag_types, tree, tag_scope, bool);
5158extern tree xref_tag_from_type                  (tree, tree, tag_scope);
5159extern bool xref_basetypes                      (tree, tree);
5160extern tree start_enum                          (tree, tree, tree, bool, bool *);
5161extern void finish_enum_value_list              (tree);
5162extern void finish_enum                         (tree);
5163extern void build_enumerator                    (tree, tree, tree, location_t);
5164extern tree lookup_enumerator                   (tree, tree);
5165extern void start_preparsed_function            (tree, tree, int);
5166extern int start_function                       (cp_decl_specifier_seq *, const cp_declarator *, tree);
5167extern tree begin_function_body                 (void);
5168extern void finish_function_body                (tree);
5169extern tree outer_curly_brace_block             (tree);
5170extern tree finish_function                     (int);
5171extern tree grokmethod                          (cp_decl_specifier_seq *, const cp_declarator *, tree);
5172extern void maybe_register_incomplete_var       (tree);
5173extern void maybe_commonize_var                 (tree);
5174extern void complete_vars                       (tree);
5175extern void finish_stmt                         (void);
5176extern tree static_fn_type                      (tree);
5177extern void revert_static_member_fn             (tree);
5178extern void fixup_anonymous_aggr                (tree);
5179extern tree compute_array_index_type            (tree, tree, tsubst_flags_t);
5180extern tree check_default_argument              (tree, tree);
5181typedef int (*walk_namespaces_fn)               (tree, void *);
5182extern int walk_namespaces                      (walk_namespaces_fn,
5183                                                 void *);
5184extern int wrapup_globals_for_namespace         (tree, void *);
5185extern tree create_implicit_typedef             (tree, tree);
5186extern int local_variable_p                     (const_tree);
5187extern tree register_dtor_fn                    (tree);
5188extern tmpl_spec_kind current_tmpl_spec_kind    (int);
5189extern tree cp_fname_init                       (const char *, tree *);
5190extern tree cxx_builtin_function                (tree decl);
5191extern tree cxx_builtin_function_ext_scope      (tree decl);
5192extern tree check_elaborated_type_specifier     (enum tag_types, tree, bool);
5193extern void warn_extern_redeclared_static       (tree, tree);
5194extern tree cxx_comdat_group                    (tree);
5195extern bool cp_missing_noreturn_ok_p            (tree);
5196extern void initialize_artificial_var           (tree, vec<constructor_elt, va_gc> *);
5197extern tree check_var_type                      (tree, tree);
5198extern tree reshape_init                        (tree, tree, tsubst_flags_t);
5199extern tree next_initializable_field (tree);
5200
5201extern bool defer_mark_used_calls;
5202extern GTY(()) vec<tree, va_gc> *deferred_mark_used_calls;
5203extern tree finish_case_label                   (location_t, tree, tree);
5204extern tree cxx_maybe_build_cleanup             (tree, tsubst_flags_t);
5205
5206/* in decl2.c */
5207extern bool check_java_method                   (tree);
5208extern tree build_memfn_type                    (tree, tree, cp_cv_quals, cp_ref_qualifier);
5209extern tree build_pointer_ptrmemfn_type (tree);
5210extern tree change_return_type                  (tree, tree);
5211extern void maybe_retrofit_in_chrg              (tree);
5212extern void maybe_make_one_only                 (tree);
5213extern bool vague_linkage_p                     (tree);
5214extern void grokclassfn                         (tree, tree,
5215                                                 enum overload_flags);
5216extern tree grok_array_decl                     (location_t, tree, tree, bool);
5217extern tree delete_sanity                       (tree, tree, bool, int, tsubst_flags_t);
5218extern tree check_classfn                       (tree, tree, tree);
5219extern void check_member_template               (tree);
5220extern tree grokfield (const cp_declarator *, cp_decl_specifier_seq *,
5221                       tree, bool, tree, tree);
5222extern tree grokbitfield (const cp_declarator *, cp_decl_specifier_seq *,
5223                          tree, tree);
5224extern tree cp_reconstruct_complex_type         (tree, tree);
5225extern void cplus_decl_attributes               (tree *, tree, int);
5226extern void finish_anon_union                   (tree);
5227extern void cp_write_global_declarations        (void);
5228extern tree coerce_new_type                     (tree);
5229extern tree coerce_delete_type                  (tree);
5230extern void comdat_linkage                      (tree);
5231extern void determine_visibility                (tree);
5232extern void constrain_class_visibility          (tree);
5233extern void import_export_decl                  (tree);
5234extern tree build_cleanup                       (tree);
5235extern tree build_offset_ref_call_from_tree     (tree, vec<tree, va_gc> **,
5236                                                 tsubst_flags_t);
5237extern bool decl_constant_var_p                 (tree);
5238extern bool decl_maybe_constant_var_p           (tree);
5239extern void check_default_args                  (tree);
5240extern bool mark_used                           (tree);
5241extern void finish_static_data_member_decl      (tree, tree, bool, tree, int);
5242extern tree cp_build_parm_decl                  (tree, tree);
5243extern tree get_guard                           (tree);
5244extern tree get_guard_cond                      (tree);
5245extern tree set_guard                           (tree);
5246extern tree get_tls_wrapper_fn                  (tree);
5247extern void mark_needed                         (tree);
5248extern bool decl_needed_p                       (tree);
5249extern void note_vague_linkage_fn               (tree);
5250extern tree build_artificial_parm               (tree, tree);
5251extern bool possibly_inlined_p                  (tree);
5252extern int parm_index                           (tree);
5253
5254/* in error.c */
5255extern void init_error                          (void);
5256extern const char *type_as_string               (tree, int);
5257extern const char *type_as_string_translate     (tree, int);
5258extern const char *decl_as_string               (tree, int);
5259extern const char *decl_as_string_translate     (tree, int);
5260extern const char *decl_as_dwarf_string         (tree, int);
5261extern const char *expr_as_string               (tree, int);
5262extern const char *lang_decl_name               (tree, int, bool);
5263extern const char *lang_decl_dwarf_name         (tree, int, bool);
5264extern const char *language_to_string           (enum languages);
5265extern const char *class_key_or_enum_as_string  (tree);
5266extern void print_instantiation_context         (void);
5267extern void maybe_warn_variadic_templates       (void);
5268extern void maybe_warn_cpp0x                    (cpp0x_warn_str str);
5269extern bool pedwarn_cxx98                       (location_t, int, const char *, ...) ATTRIBUTE_GCC_DIAG(3,4);
5270extern location_t location_of                   (tree);
5271extern void qualified_name_lookup_error         (tree, tree, tree,
5272                                                 location_t);
5273
5274/* in except.c */
5275extern void init_exception_processing           (void);
5276extern tree expand_start_catch_block            (tree);
5277extern void expand_end_catch_block              (void);
5278extern tree build_exc_ptr                       (void);
5279extern tree build_throw                         (tree);
5280extern int nothrow_libfn_p                      (const_tree);
5281extern void check_handlers                      (tree);
5282extern tree finish_noexcept_expr                (tree, tsubst_flags_t);
5283extern bool expr_noexcept_p                     (tree, tsubst_flags_t);
5284extern void perform_deferred_noexcept_checks    (void);
5285extern bool nothrow_spec_p                      (const_tree);
5286extern bool type_noexcept_p                     (const_tree);
5287extern bool type_throw_all_p                    (const_tree);
5288extern tree build_noexcept_spec                 (tree, int);
5289extern void choose_personality_routine          (enum languages);
5290extern tree build_must_not_throw_expr           (tree,tree);
5291extern tree eh_type_info                        (tree);
5292extern tree begin_eh_spec_block                 (void);
5293extern void finish_eh_spec_block                (tree, tree);
5294extern tree build_eh_type_type                  (tree);
5295extern tree cp_protect_cleanup_actions          (void);
5296
5297/* in expr.c */
5298extern tree cplus_expand_constant               (tree);
5299extern tree mark_rvalue_use                     (tree);
5300extern tree mark_lvalue_use                     (tree);
5301extern tree mark_type_use                       (tree);
5302extern void mark_exp_read                       (tree);
5303
5304/* friend.c */
5305extern int is_friend                            (tree, tree);
5306extern void make_friend_class                   (tree, tree, bool);
5307extern void add_friend                          (tree, tree, bool);
5308extern tree do_friend                           (tree, tree, tree, tree, enum overload_flags, bool);
5309
5310/* in init.c */
5311extern tree expand_member_init                  (tree);
5312extern void emit_mem_initializers               (tree);
5313extern tree build_aggr_init                     (tree, tree, int,
5314                                                 tsubst_flags_t);
5315extern int is_class_type                        (tree, int);
5316extern tree get_type_value                      (tree);
5317extern tree build_zero_init                     (tree, tree, bool);
5318extern tree build_value_init                    (tree, tsubst_flags_t);
5319extern tree build_value_init_noctor             (tree, tsubst_flags_t);
5320extern tree build_offset_ref                    (tree, tree, bool,
5321                                                 tsubst_flags_t);
5322extern tree build_new                           (vec<tree, va_gc> **, tree, tree,
5323                                                 vec<tree, va_gc> **, int,
5324                                                 tsubst_flags_t);
5325extern tree get_temp_regvar                     (tree, tree);
5326extern tree build_vec_init                      (tree, tree, tree, bool, int,
5327                                                 tsubst_flags_t);
5328extern tree build_delete                        (tree, tree,
5329                                                 special_function_kind,
5330                                                 int, int, tsubst_flags_t);
5331extern void push_base_cleanups                  (void);
5332extern tree build_vec_delete                    (tree, tree,
5333                                                 special_function_kind, int,
5334                                                 tsubst_flags_t);
5335extern tree create_temporary_var                (tree);
5336extern void initialize_vtbl_ptrs                (tree);
5337extern tree build_java_class_ref                (tree);
5338extern tree integral_constant_value             (tree);
5339extern tree decl_constant_value_safe            (tree);
5340extern int diagnose_uninitialized_cst_or_ref_member (tree, bool, bool);
5341
5342/* in lex.c */
5343extern void cxx_dup_lang_specific_decl          (tree);
5344extern void yyungetc                            (int, int);
5345
5346extern tree unqualified_name_lookup_error       (tree);
5347extern tree unqualified_fn_lookup_error         (tree);
5348extern tree build_lang_decl                     (enum tree_code, tree, tree);
5349extern tree build_lang_decl_loc                 (location_t, enum tree_code, tree, tree);
5350extern void retrofit_lang_decl                  (tree);
5351extern tree copy_decl                           (tree);
5352extern tree copy_type                           (tree);
5353extern tree cxx_make_type                       (enum tree_code);
5354extern tree make_class_type                     (enum tree_code);
5355extern bool cxx_init                            (void);
5356extern void cxx_finish                          (void);
5357extern bool in_main_input_context               (void);
5358
5359/* in method.c */
5360extern void init_method                         (void);
5361extern tree make_thunk                          (tree, bool, tree, tree);
5362extern void finish_thunk                        (tree);
5363extern void use_thunk                           (tree, bool);
5364extern bool trivial_fn_p                        (tree);
5365extern bool maybe_explain_implicit_delete       (tree);
5366extern void explain_implicit_non_constexpr      (tree);
5367extern void deduce_inheriting_ctor              (tree);
5368extern void synthesize_method                   (tree);
5369extern tree lazily_declare_fn                   (special_function_kind,
5370                                                 tree);
5371extern tree skip_artificial_parms_for           (const_tree, tree);
5372extern int num_artificial_parms_for             (const_tree);
5373extern tree make_alias_for                      (tree, tree);
5374extern tree get_copy_ctor                       (tree, tsubst_flags_t);
5375extern tree get_copy_assign                     (tree);
5376extern tree get_default_ctor                    (tree);
5377extern tree get_dtor                            (tree, tsubst_flags_t);
5378extern tree locate_ctor                         (tree);
5379extern tree implicitly_declare_fn               (special_function_kind, tree,
5380                                                 bool, tree, tree);
5381
5382/* In optimize.c */
5383extern bool maybe_clone_body                    (tree);
5384
5385/* in pt.c */
5386extern bool check_template_shadow               (tree);
5387extern tree get_innermost_template_args         (tree, int);
5388extern void maybe_begin_member_template_processing (tree);
5389extern void maybe_end_member_template_processing (void);
5390extern tree finish_member_template_decl         (tree);
5391extern void begin_template_parm_list            (void);
5392extern bool begin_specialization                (void);
5393extern void reset_specialization                (void);
5394extern void end_specialization                  (void);
5395extern void begin_explicit_instantiation        (void);
5396extern void end_explicit_instantiation          (void);
5397extern tree check_explicit_specialization       (tree, tree, int, int);
5398extern int num_template_headers_for_class       (tree);
5399extern void check_template_variable             (tree);
5400extern tree make_auto                           (void);
5401extern tree do_auto_deduction                   (tree, tree, tree);
5402extern tree type_uses_auto                      (tree);
5403extern void append_type_to_template_for_access_check (tree, tree, tree,
5404                                                      location_t);
5405extern tree splice_late_return_type             (tree, tree);
5406extern bool is_auto                             (const_tree);
5407extern tree process_template_parm               (tree, location_t, tree, 
5408                                                 bool, bool);
5409extern tree end_template_parm_list              (tree);
5410extern void end_template_decl                   (void);
5411extern tree maybe_update_decl_type              (tree, tree);
5412extern bool check_default_tmpl_args             (tree, tree, bool, bool, int);
5413extern tree push_template_decl                  (tree);
5414extern tree push_template_decl_real             (tree, bool);
5415extern tree add_inherited_template_parms        (tree, tree);
5416extern bool redeclare_class_template            (tree, tree);
5417extern tree lookup_template_class               (tree, tree, tree, tree,
5418                                                 int, tsubst_flags_t);
5419extern tree lookup_template_function            (tree, tree);
5420extern int uses_template_parms                  (tree);
5421extern int uses_template_parms_level            (tree, int);
5422extern bool in_template_function                (void);
5423extern tree instantiate_class_template          (tree);
5424extern tree instantiate_template                (tree, tree, tsubst_flags_t);
5425extern tree fn_type_unification                 (tree, tree, tree,
5426                                                 const tree *, unsigned int,
5427                                                 tree, unification_kind_t, int,
5428                                                 bool);
5429extern void mark_decl_instantiated              (tree, int);
5430extern int more_specialized_fn                  (tree, tree, int);
5431extern void do_decl_instantiation               (tree, tree);
5432extern void do_type_instantiation               (tree, tree, tsubst_flags_t);
5433extern bool always_instantiate_p                (tree);
5434extern void maybe_instantiate_noexcept          (tree);
5435extern tree instantiate_decl                    (tree, int, bool);
5436extern int comp_template_parms                  (const_tree, const_tree);
5437extern bool uses_parameter_packs                (tree);
5438extern bool template_parameter_pack_p           (const_tree);
5439extern bool function_parameter_pack_p           (const_tree);
5440extern bool function_parameter_expanded_from_pack_p (tree, tree);
5441extern tree make_pack_expansion                 (tree);
5442extern bool check_for_bare_parameter_packs      (tree);
5443extern tree build_template_info                 (tree, tree);
5444extern tree get_template_info                   (const_tree);
5445extern vec<qualified_typedef_usage_t, va_gc> *get_types_needing_access_check (tree);
5446extern int template_class_depth                 (tree);
5447extern int is_specialization_of                 (tree, tree);
5448extern bool is_specialization_of_friend         (tree, tree);
5449extern tree get_pattern_parm                    (tree, tree);
5450extern int comp_template_args                   (tree, tree);
5451extern tree maybe_process_partial_specialization (tree);
5452extern tree most_specialized_instantiation      (tree);
5453extern void print_candidates                    (tree);
5454extern void instantiate_pending_templates       (int);
5455extern tree tsubst_default_argument             (tree, tree, tree);
5456extern tree tsubst (tree, tree, tsubst_flags_t, tree);
5457extern tree tsubst_copy_and_build               (tree, tree, tsubst_flags_t,
5458                                                 tree, bool, bool);
5459extern tree most_general_template               (tree);
5460extern tree get_mostly_instantiated_function_type (tree);
5461extern int problematic_instantiation_changed    (void);
5462extern void record_last_problematic_instantiation (void);
5463extern struct tinst_level *current_instantiation(void);
5464extern tree maybe_get_template_decl_from_type_decl (tree);
5465extern int processing_template_parmlist;
5466extern bool dependent_type_p                    (tree);
5467extern bool dependent_scope_p                   (tree);
5468extern bool any_dependent_template_arguments_p  (const_tree);
5469extern bool dependent_template_p                (tree);
5470extern bool dependent_template_id_p             (tree, tree);
5471extern bool type_dependent_expression_p         (tree);
5472extern bool any_type_dependent_arguments_p      (const vec<tree, va_gc> *);
5473extern bool any_type_dependent_elements_p       (const_tree);
5474extern bool type_dependent_expression_p_push    (tree);
5475extern bool value_dependent_expression_p        (tree);
5476extern bool instantiation_dependent_expression_p (tree);
5477extern bool any_value_dependent_elements_p      (const_tree);
5478extern bool dependent_omp_for_p                 (tree, tree, tree, tree);
5479extern tree resolve_typename_type               (tree, bool);
5480extern tree template_for_substitution           (tree);
5481extern tree build_non_dependent_expr            (tree);
5482extern void make_args_non_dependent             (vec<tree, va_gc> *);
5483extern bool reregister_specialization           (tree, tree, tree);
5484extern tree fold_non_dependent_expr             (tree);
5485extern tree fold_non_dependent_expr_sfinae      (tree, tsubst_flags_t);
5486extern bool alias_type_or_template_p            (tree);
5487extern bool alias_template_specialization_p     (const_tree);
5488extern bool explicit_class_specialization_p     (tree);
5489extern int push_tinst_level                     (tree);
5490extern void pop_tinst_level                     (void);
5491extern struct tinst_level *outermost_tinst_level(void);
5492extern void init_template_processing            (void);
5493extern void print_template_statistics           (void);
5494bool template_template_parameter_p              (const_tree);
5495bool template_type_parameter_p                  (const_tree);
5496extern bool primary_template_instantiation_p    (const_tree);
5497extern tree get_primary_template_innermost_parameters   (const_tree);
5498extern tree get_template_parms_at_level (tree, int);
5499extern tree get_template_innermost_arguments    (const_tree);
5500extern tree get_template_argument_pack_elems    (const_tree);
5501extern tree get_function_template_decl          (const_tree);
5502extern tree resolve_nondeduced_context          (tree);
5503extern hashval_t iterative_hash_template_arg (tree arg, hashval_t val);
5504
5505/* in repo.c */
5506extern void init_repo                           (void);
5507extern int repo_emit_p                          (tree);
5508extern bool repo_export_class_p                 (const_tree);
5509extern void finish_repo                         (void);
5510
5511/* in rtti.c */
5512/* A vector of all tinfo decls that haven't been emitted yet.  */
5513extern GTY(()) vec<tree, va_gc> *unemitted_tinfo_decls;
5514
5515extern void init_rtti_processing                (void);
5516extern tree build_typeid                        (tree, tsubst_flags_t);
5517extern tree get_tinfo_decl                      (tree);
5518extern tree get_typeid                          (tree, tsubst_flags_t);
5519extern tree build_headof                        (tree);
5520extern tree build_dynamic_cast                  (tree, tree, tsubst_flags_t);
5521extern void emit_support_tinfos                 (void);
5522extern bool emit_tinfo_decl                     (tree);
5523
5524/* in search.c */
5525extern bool accessible_base_p                   (tree, tree, bool);
5526extern tree lookup_base                         (tree, tree, base_access,
5527                                                 base_kind *, tsubst_flags_t);
5528extern tree dcast_base_hint                     (tree, tree);
5529extern int accessible_p                         (tree, tree, bool);
5530extern int accessible_in_template_p             (tree, tree);
5531extern tree lookup_field_1                      (tree, tree, bool);
5532extern tree lookup_field                        (tree, tree, int, bool);
5533extern int lookup_fnfields_1                    (tree, tree);
5534extern tree lookup_fnfields_slot                (tree, tree);
5535extern tree lookup_fnfields_slot_nolazy         (tree, tree);
5536extern int class_method_index_for_fn            (tree, tree);
5537extern tree lookup_fnfields                     (tree, tree, int);
5538extern tree lookup_member                       (tree, tree, int, bool,
5539                                                 tsubst_flags_t);
5540extern int look_for_overrides                   (tree, tree);
5541extern void get_pure_virtuals                   (tree);
5542extern void maybe_suppress_debug_info           (tree);
5543extern void note_debug_info_needed              (tree);
5544extern void print_search_statistics             (void);
5545extern void reinit_search_statistics            (void);
5546extern tree current_scope                       (void);
5547extern int at_function_scope_p                  (void);
5548extern bool at_class_scope_p                    (void);
5549extern bool at_namespace_scope_p                (void);
5550extern tree context_for_name_lookup             (tree);
5551extern tree lookup_conversions                  (tree);
5552extern tree binfo_from_vbase                    (tree);
5553extern tree binfo_for_vbase                     (tree, tree);
5554extern tree look_for_overrides_here             (tree, tree);
5555#define dfs_skip_bases ((tree)1)
5556extern tree dfs_walk_all (tree, tree (*) (tree, void *),
5557                          tree (*) (tree, void *), void *);
5558extern tree dfs_walk_once (tree, tree (*) (tree, void *),
5559                           tree (*) (tree, void *), void *);
5560extern tree binfo_via_virtual                   (tree, tree);
5561extern tree build_baselink                      (tree, tree, tree, tree);
5562extern tree adjust_result_of_qualified_name_lookup
5563                                                (tree, tree, tree);
5564extern tree copied_binfo                        (tree, tree);
5565extern tree original_binfo                      (tree, tree);
5566extern int shared_member_p                      (tree);
5567
5568
5569/* The representation of a deferred access check.  */
5570
5571typedef struct GTY(()) deferred_access_check {
5572  /* The base class in which the declaration is referenced. */
5573  tree binfo;
5574  /* The declaration whose access must be checked.  */
5575  tree decl;
5576  /* The declaration that should be used in the error message.  */
5577  tree diag_decl;
5578  /* The location of this access.  */
5579  location_t loc;
5580} deferred_access_check;
5581
5582/* in semantics.c */
5583extern void push_deferring_access_checks        (deferring_kind);
5584extern void resume_deferring_access_checks      (void);
5585extern void stop_deferring_access_checks        (void);
5586extern void pop_deferring_access_checks         (void);
5587extern vec<deferred_access_check, va_gc> *get_deferred_access_checks (void);
5588extern void pop_to_parent_deferring_access_checks (void);
5589extern bool perform_access_checks (vec<deferred_access_check, va_gc> *,
5590                                   tsubst_flags_t);
5591extern bool perform_deferred_access_checks      (tsubst_flags_t);
5592extern bool perform_or_defer_access_check       (tree, tree, tree,
5593                                                 tsubst_flags_t);
5594extern int stmts_are_full_exprs_p               (void);
5595extern void init_cp_semantics                   (void);
5596extern tree do_poplevel                         (tree);
5597extern void add_decl_expr                       (tree);
5598extern tree maybe_cleanup_point_expr_void       (tree);
5599extern tree finish_expr_stmt                    (tree);
5600extern tree begin_if_stmt                       (void);
5601extern void finish_if_stmt_cond                 (tree, tree);
5602extern tree finish_then_clause                  (tree);
5603extern void begin_else_clause                   (tree);
5604extern void finish_else_clause                  (tree);
5605extern void finish_if_stmt                      (tree);
5606extern tree begin_while_stmt                    (void);
5607extern void finish_while_stmt_cond              (tree, tree);
5608extern void finish_while_stmt                   (tree);
5609extern tree begin_do_stmt                       (void);
5610extern void finish_do_body                      (tree);
5611extern void finish_do_stmt                      (tree, tree);
5612extern tree finish_return_stmt                  (tree);
5613extern tree begin_for_scope                     (tree *);
5614extern tree begin_for_stmt                      (tree, tree);
5615extern void finish_for_init_stmt                (tree);
5616extern void finish_for_cond                     (tree, tree);
5617extern void finish_for_expr                     (tree, tree);
5618extern void finish_for_stmt                     (tree);
5619extern tree begin_range_for_stmt                (tree, tree);
5620extern void finish_range_for_decl               (tree, tree, tree);
5621extern void finish_range_for_stmt               (tree);
5622extern tree finish_break_stmt                   (void);
5623extern tree finish_continue_stmt                (void);
5624extern tree begin_switch_stmt                   (void);
5625extern void finish_switch_cond                  (tree, tree);
5626extern void finish_switch_stmt                  (tree);
5627extern tree finish_goto_stmt                    (tree);
5628extern tree begin_try_block                     (void);
5629extern void finish_try_block                    (tree);
5630extern void finish_handler_sequence             (tree);
5631extern tree begin_function_try_block            (tree *);
5632extern void finish_function_try_block           (tree);
5633extern void finish_function_handler_sequence    (tree, tree);
5634extern void finish_cleanup_try_block            (tree);
5635extern tree begin_handler                       (void);
5636extern void finish_handler_parms                (tree, tree);
5637extern void finish_handler                      (tree);
5638extern void finish_cleanup                      (tree, tree);
5639extern bool literal_type_p (tree);
5640extern tree register_constexpr_fundef (tree, tree);
5641extern bool check_constexpr_ctor_body (tree, tree);
5642extern tree ensure_literal_type_for_constexpr_object (tree);
5643extern bool potential_constant_expression (tree);
5644extern bool potential_rvalue_constant_expression (tree);
5645extern bool require_potential_constant_expression (tree);
5646extern bool require_potential_rvalue_constant_expression (tree);
5647extern tree cxx_constant_value (tree);
5648extern tree maybe_constant_value (tree);
5649extern tree maybe_constant_init (tree);
5650extern bool is_sub_constant_expr (tree);
5651extern bool reduced_constant_expression_p (tree);
5652extern void explain_invalid_constexpr_fn (tree);
5653extern vec<tree> cx_error_context (void);
5654
5655enum {
5656  BCS_NO_SCOPE = 1,
5657  BCS_TRY_BLOCK = 2,
5658  BCS_FN_BODY = 4
5659};
5660extern tree begin_compound_stmt                 (unsigned int);
5661
5662extern void finish_compound_stmt                (tree);
5663extern tree finish_asm_stmt                     (int, tree, tree, tree, tree,
5664                                                 tree);
5665extern tree finish_label_stmt                   (tree);
5666extern void finish_label_decl                   (tree);
5667extern tree finish_parenthesized_expr           (tree);
5668extern tree finish_non_static_data_member       (tree, tree, tree);
5669extern tree begin_stmt_expr                     (void);
5670extern tree finish_stmt_expr_expr               (tree, tree);
5671extern tree finish_stmt_expr                    (tree, bool);
5672extern tree stmt_expr_value_expr                (tree);
5673bool empty_expr_stmt_p                          (tree);
5674extern tree perform_koenig_lookup               (tree, vec<tree, va_gc> *, bool,
5675                                                 tsubst_flags_t);
5676extern tree finish_call_expr                    (tree, vec<tree, va_gc> **, bool,
5677                                                 bool, tsubst_flags_t);
5678extern tree finish_increment_expr               (tree, enum tree_code);
5679extern tree finish_this_expr                    (void);
5680extern tree finish_pseudo_destructor_expr       (tree, tree, tree);
5681extern tree finish_unary_op_expr                (location_t, enum tree_code, tree,
5682                                                 tsubst_flags_t);
5683extern tree finish_compound_literal             (tree, tree, tsubst_flags_t);
5684extern tree finish_fname                        (tree);
5685extern void finish_translation_unit             (void);
5686extern tree finish_template_type_parm           (tree, tree);
5687extern tree finish_template_template_parm       (tree, tree);
5688extern tree begin_class_definition              (tree);
5689extern void finish_template_decl                (tree);
5690extern tree finish_template_type                (tree, tree, int);
5691extern tree finish_base_specifier               (tree, tree, bool);
5692extern void finish_member_declaration           (tree);
5693extern tree finish_id_expression                (tree, tree, tree,
5694                                                 cp_id_kind *,
5695                                                 bool, bool, bool *,
5696                                                 bool, bool, bool, bool,
5697                                                 const char **,
5698                                                 location_t);
5699extern tree finish_typeof                       (tree);
5700extern tree finish_underlying_type              (tree);
5701extern tree calculate_bases                     (tree);
5702extern tree finish_bases                        (tree, bool);
5703extern tree calculate_direct_bases              (tree);
5704extern tree finish_offsetof                     (tree);
5705extern void finish_decl_cleanup                 (tree, tree);
5706extern void finish_eh_cleanup                   (tree);
5707extern void emit_associated_thunks              (tree);
5708extern void finish_mem_initializers             (tree);
5709extern tree check_template_template_default_arg (tree);
5710extern bool expand_or_defer_fn_1                (tree);
5711extern void expand_or_defer_fn                  (tree);
5712extern void add_typedef_to_current_template_for_access_check (tree, tree,
5713                                                              location_t);
5714extern void check_accessibility_of_qualified_id (tree, tree, tree);
5715extern tree finish_qualified_id_expr            (tree, tree, bool, bool,
5716                                                 bool, bool, tsubst_flags_t);
5717extern void simplify_aggr_init_expr             (tree *);
5718extern void finalize_nrv                        (tree *, tree, tree);
5719extern void note_decl_for_pch                   (tree);
5720extern tree finish_omp_clauses                  (tree);
5721extern void finish_omp_threadprivate            (tree);
5722extern tree begin_omp_structured_block          (void);
5723extern tree finish_omp_structured_block         (tree);
5724extern tree begin_omp_parallel                  (void);
5725extern tree finish_omp_parallel                 (tree, tree);
5726extern tree begin_omp_task                      (void);
5727extern tree finish_omp_task                     (tree, tree);
5728extern tree finish_omp_for                      (location_t, tree, tree,
5729                                                 tree, tree, tree, tree, tree);
5730extern void finish_omp_atomic                   (enum tree_code, enum tree_code,
5731                                                 tree, tree, tree, tree, tree);
5732extern void finish_omp_barrier                  (void);
5733extern void finish_omp_flush                    (void);
5734extern void finish_omp_taskwait                 (void);
5735extern tree begin_transaction_stmt              (location_t, tree *, int);
5736extern void finish_transaction_stmt             (tree, tree, int, tree);
5737extern tree build_transaction_expr              (location_t, tree, int, tree);
5738extern void finish_omp_taskyield                (void);
5739extern bool cxx_omp_create_clause_info          (tree, tree, bool, bool, bool);
5740extern tree baselink_for_fns                    (tree);
5741extern void finish_static_assert                (tree, tree, location_t,
5742                                                 bool);
5743extern tree finish_decltype_type                (tree, bool, tsubst_flags_t);
5744extern tree finish_trait_expr                   (enum cp_trait_kind, tree, tree);
5745extern tree build_lambda_expr                   (void);
5746extern tree build_lambda_object                 (tree);
5747extern tree begin_lambda_type                   (tree);
5748extern tree lambda_capture_field_type           (tree);
5749extern tree lambda_return_type                  (tree);
5750extern tree lambda_proxy_type                   (tree);
5751extern tree lambda_function                     (tree);
5752extern void apply_deduced_return_type           (tree, tree);
5753extern tree add_capture                         (tree, tree, tree, bool, bool);
5754extern tree add_default_capture                 (tree, tree, tree);
5755extern tree build_capture_proxy                 (tree);
5756extern void insert_capture_proxy                (tree);
5757extern void insert_pending_capture_proxies      (void);
5758extern bool is_capture_proxy                    (tree);
5759extern bool is_normal_capture_proxy             (tree);
5760extern void register_capture_members            (tree);
5761extern tree lambda_expr_this_capture            (tree);
5762extern tree maybe_resolve_dummy                 (tree);
5763extern tree nonlambda_method_basetype           (void);
5764extern void maybe_add_lambda_conv_op            (tree);
5765extern bool is_lambda_ignored_entity            (tree);
5766
5767/* in tree.c */
5768extern int cp_tree_operand_length               (const_tree);
5769void cp_free_lang_data                          (tree t);
5770extern tree force_target_expr                   (tree, tree, tsubst_flags_t);
5771extern tree build_target_expr_with_type         (tree, tree, tsubst_flags_t);
5772extern void lang_check_failed                   (const char *, int,
5773                                                 const char *) ATTRIBUTE_NORETURN;
5774extern tree stabilize_expr                      (tree, tree *);
5775extern void stabilize_call                      (tree, tree *);
5776extern bool stabilize_init                      (tree, tree *);
5777extern tree add_stmt_to_compound                (tree, tree);
5778extern void init_tree                           (void);
5779extern bool pod_type_p                          (const_tree);
5780extern bool layout_pod_type_p                   (const_tree);
5781extern bool std_layout_type_p                   (const_tree);
5782extern bool trivial_type_p                      (const_tree);
5783extern bool trivially_copyable_p                (const_tree);
5784extern bool scalarish_type_p                    (const_tree);
5785extern bool type_has_nontrivial_default_init    (const_tree);
5786extern bool type_has_nontrivial_copy_init       (const_tree);
5787extern bool class_tmpl_impl_spec_p              (const_tree);
5788extern int zero_init_p                          (const_tree);
5789extern bool check_abi_tag_redeclaration         (const_tree, const_tree, const_tree);
5790extern tree strip_typedefs                      (tree);
5791extern tree strip_typedefs_expr                 (tree);
5792extern tree copy_binfo                          (tree, tree, tree,
5793                                                 tree *, int);
5794extern int member_p                             (const_tree);
5795extern cp_lvalue_kind real_lvalue_p             (const_tree);
5796extern cp_lvalue_kind lvalue_kind               (const_tree);
5797extern bool lvalue_or_rvalue_with_address_p     (const_tree);
5798extern bool xvalue_p                            (const_tree);
5799extern bool builtin_valid_in_constant_expr_p    (const_tree);
5800extern tree build_min                           (enum tree_code, tree, ...);
5801extern tree build_min_nt_loc                    (location_t, enum tree_code,
5802                                                 ...);
5803extern tree build_min_non_dep                   (enum tree_code, tree, ...);
5804extern tree build_min_non_dep_call_vec          (tree, tree, vec<tree, va_gc> *);
5805extern tree build_cplus_new                     (tree, tree, tsubst_flags_t);
5806extern tree build_aggr_init_expr                (tree, tree);
5807extern tree get_target_expr                     (tree);
5808extern tree get_target_expr_sfinae              (tree, tsubst_flags_t);
5809extern tree build_cplus_array_type              (tree, tree);
5810extern tree build_array_of_n_type               (tree, int);
5811extern tree build_array_copy                    (tree);
5812extern tree build_vec_init_expr                 (tree, tree, tsubst_flags_t);
5813extern void diagnose_non_constexpr_vec_init     (tree);
5814extern tree hash_tree_cons                      (tree, tree, tree);
5815extern tree hash_tree_chain                     (tree, tree);
5816extern tree build_qualified_name                (tree, tree, tree, bool);
5817extern tree build_ref_qualified_type            (tree, cp_ref_qualifier);
5818extern int is_overloaded_fn                     (tree);
5819extern tree dependent_name                      (tree);
5820extern tree get_fns                             (tree);
5821extern tree get_first_fn                        (tree);
5822extern tree ovl_cons                            (tree, tree);
5823extern tree build_overload                      (tree, tree);
5824extern tree ovl_scope                           (tree);
5825extern bool non_static_member_function_p        (tree);
5826extern const char *cxx_printable_name           (tree, int);
5827extern const char *cxx_printable_name_translate (tree, int);
5828extern tree build_exception_variant             (tree, tree);
5829extern tree bind_template_template_parm         (tree, tree);
5830extern tree array_type_nelts_total              (tree);
5831extern tree array_type_nelts_top                (tree);
5832extern tree break_out_target_exprs              (tree);
5833extern tree get_type_decl                       (tree);
5834extern tree decl_namespace_context              (tree);
5835extern bool decl_anon_ns_mem_p                  (const_tree);
5836extern tree lvalue_type                         (tree);
5837extern tree error_type                          (tree);
5838extern int varargs_function_p                   (const_tree);
5839extern bool really_overloaded_fn                (tree);
5840extern bool cp_tree_equal                       (tree, tree);
5841extern tree no_linkage_check                    (tree, bool);
5842extern void debug_binfo                         (tree);
5843extern tree build_dummy_object                  (tree);
5844extern tree maybe_dummy_object                  (tree, tree *);
5845extern int is_dummy_object                      (const_tree);
5846extern const struct attribute_spec cxx_attribute_table[];
5847extern tree make_ptrmem_cst                     (tree, tree);
5848extern tree cp_build_type_attribute_variant     (tree, tree);
5849extern tree cp_build_reference_type             (tree, bool);
5850extern tree move                                (tree);
5851extern tree cp_build_qualified_type_real        (tree, int, tsubst_flags_t);
5852#define cp_build_qualified_type(TYPE, QUALS) \
5853  cp_build_qualified_type_real ((TYPE), (QUALS), tf_warning_or_error)
5854extern bool cv_qualified_p                      (const_tree);
5855extern tree cv_unqualified                      (tree);
5856extern special_function_kind special_function_p (const_tree);
5857extern int count_trees                          (tree);
5858extern int char_type_p                          (tree);
5859extern void verify_stmt_tree                    (tree);
5860extern linkage_kind decl_linkage                (tree);
5861extern duration_kind decl_storage_duration      (tree);
5862extern tree cp_walk_subtrees (tree*, int*, walk_tree_fn,
5863                              void*, struct pointer_set_t*);
5864#define cp_walk_tree(tp,func,data,pset) \
5865        walk_tree_1 (tp, func, data, pset, cp_walk_subtrees)
5866#define cp_walk_tree_without_duplicates(tp,func,data) \
5867        walk_tree_without_duplicates_1 (tp, func, data, cp_walk_subtrees)
5868extern tree fold_if_not_in_template             (tree);
5869extern tree rvalue                              (tree);
5870extern tree convert_bitfield_to_declared_type   (tree);
5871extern tree cp_save_expr                        (tree);
5872extern bool cast_valid_in_integral_constant_expression_p (tree);
5873extern bool cxx_type_hash_eq                    (const_tree, const_tree);
5874
5875extern void cxx_print_statistics                (void);
5876extern bool maybe_warn_zero_as_null_pointer_constant (tree, location_t);
5877
5878/* in ptree.c */
5879extern void cxx_print_xnode                     (FILE *, tree, int);
5880extern void cxx_print_decl                      (FILE *, tree, int);
5881extern void cxx_print_type                      (FILE *, tree, int);
5882extern void cxx_print_identifier                (FILE *, tree, int);
5883extern void cxx_print_error_function            (diagnostic_context *,
5884                                                 const char *,
5885                                                 struct diagnostic_info *);
5886
5887/* in typeck.c */
5888extern bool cxx_mark_addressable                (tree);
5889extern int string_conv_p                        (const_tree, const_tree, int);
5890extern tree cp_truthvalue_conversion            (tree);
5891extern tree condition_conversion                (tree);
5892extern tree require_complete_type               (tree);
5893extern tree require_complete_type_sfinae        (tree, tsubst_flags_t);
5894extern tree complete_type                       (tree);
5895extern tree complete_type_or_else               (tree, tree);
5896extern tree complete_type_or_maybe_complain     (tree, tree, tsubst_flags_t);
5897extern int type_unknown_p                       (const_tree);
5898enum { ce_derived, ce_normal, ce_exact };
5899extern bool comp_except_specs                   (const_tree, const_tree, int);
5900extern bool comptypes                           (tree, tree, int);
5901extern bool same_type_ignoring_top_level_qualifiers_p (tree, tree);
5902extern bool compparms                           (const_tree, const_tree);
5903extern int comp_cv_qualification                (const_tree, const_tree);
5904extern int comp_cv_qual_signature               (tree, tree);
5905extern tree cxx_sizeof_or_alignof_expr          (tree, enum tree_code, bool);
5906extern tree cxx_sizeof_or_alignof_type          (tree, enum tree_code, bool);
5907extern tree cxx_alignas_expr                    (tree);
5908extern tree cxx_sizeof_nowarn                   (tree);
5909extern tree is_bitfield_expr_with_lowered_type  (const_tree);
5910extern tree unlowered_expr_type                 (const_tree);
5911extern tree decay_conversion                    (tree, tsubst_flags_t);
5912extern tree build_class_member_access_expr      (tree, tree, tree, bool,
5913                                                 tsubst_flags_t);
5914extern tree finish_class_member_access_expr     (tree, tree, bool, 
5915                                                 tsubst_flags_t);
5916extern tree build_x_indirect_ref                (location_t, tree,
5917                                                 ref_operator, tsubst_flags_t);
5918extern tree cp_build_indirect_ref               (tree, ref_operator,
5919                                                 tsubst_flags_t);
5920extern tree build_array_ref                     (location_t, tree, tree);
5921extern tree cp_build_array_ref                  (location_t, tree, tree,
5922                                                 tsubst_flags_t);
5923extern tree get_member_function_from_ptrfunc    (tree *, tree, tsubst_flags_t);
5924extern tree cp_build_function_call              (tree, tree, tsubst_flags_t);
5925extern tree cp_build_function_call_nary         (tree, tsubst_flags_t, ...)
5926                                                ATTRIBUTE_SENTINEL;
5927extern tree cp_build_function_call_vec          (tree, vec<tree, va_gc> **,
5928                                                 tsubst_flags_t);
5929extern tree build_x_binary_op                   (location_t,
5930                                                 enum tree_code, tree,
5931                                                 enum tree_code, tree,
5932                                                 enum tree_code, tree *,
5933                                                 tsubst_flags_t);
5934extern tree build_x_array_ref                   (location_t, tree, tree,
5935                                                 tsubst_flags_t);
5936extern tree build_x_unary_op                    (location_t,
5937                                                 enum tree_code, tree,
5938                                                 tsubst_flags_t);
5939extern tree cp_build_addr_expr                  (tree, tsubst_flags_t);
5940extern tree cp_build_addr_expr_strict           (tree, tsubst_flags_t);
5941extern tree cp_build_unary_op                   (enum tree_code, tree, int, 
5942                                                 tsubst_flags_t);
5943extern tree unary_complex_lvalue                (enum tree_code, tree);
5944extern tree build_x_conditional_expr            (location_t, tree, tree, tree, 
5945                                                 tsubst_flags_t);
5946extern tree build_x_compound_expr_from_list     (tree, expr_list_kind,
5947                                                 tsubst_flags_t);
5948extern tree build_x_compound_expr_from_vec      (vec<tree, va_gc> *,
5949                                                 const char *, tsubst_flags_t);
5950extern tree build_x_compound_expr               (location_t, tree, tree,
5951                                                 tsubst_flags_t);
5952extern tree build_compound_expr                 (location_t, tree, tree);
5953extern tree cp_build_compound_expr              (tree, tree, tsubst_flags_t);
5954extern tree build_static_cast                   (tree, tree, tsubst_flags_t);
5955extern tree build_reinterpret_cast              (tree, tree, tsubst_flags_t);
5956extern tree build_const_cast                    (tree, tree, tsubst_flags_t);
5957extern tree build_c_cast                        (location_t, tree, tree);
5958extern tree cp_build_c_cast                     (tree, tree, tsubst_flags_t);
5959extern tree build_x_modify_expr                 (location_t, tree,
5960                                                 enum tree_code, tree,
5961                                                 tsubst_flags_t);
5962extern tree cp_build_modify_expr                (tree, enum tree_code, tree,
5963                                                 tsubst_flags_t);
5964extern tree convert_for_initialization          (tree, tree, tree, int,
5965                                                 impl_conv_rhs, tree, int,
5966                                                 tsubst_flags_t);
5967extern int comp_ptr_ttypes                      (tree, tree);
5968extern bool comp_ptr_ttypes_const               (tree, tree);
5969extern bool error_type_p                        (const_tree);
5970extern int ptr_reasonably_similar               (const_tree, const_tree);
5971extern tree build_ptrmemfunc                    (tree, tree, int, bool,
5972                                                 tsubst_flags_t);
5973extern int cp_type_quals                        (const_tree);
5974extern int type_memfn_quals                     (const_tree);
5975extern cp_ref_qualifier type_memfn_rqual        (const_tree);
5976extern tree apply_memfn_quals                   (tree, cp_cv_quals, cp_ref_qualifier);
5977extern bool cp_has_mutable_p                    (const_tree);
5978extern bool at_least_as_qualified_p             (const_tree, const_tree);
5979extern void cp_apply_type_quals_to_decl         (int, tree);
5980extern tree build_ptrmemfunc1                   (tree, tree, tree);
5981extern void expand_ptrmemfunc_cst               (tree, tree *, tree *);
5982extern tree type_after_usual_arithmetic_conversions (tree, tree);
5983extern tree common_pointer_type                 (tree, tree);
5984extern tree composite_pointer_type              (tree, tree, tree, tree,
5985                                                 composite_pointer_operation, 
5986                                                 tsubst_flags_t);
5987extern tree merge_types                         (tree, tree);
5988extern tree strip_array_domain                  (tree);
5989extern tree check_return_expr                   (tree, bool *);
5990extern tree cp_build_binary_op                  (location_t,
5991                                                 enum tree_code, tree, tree,
5992                                                 tsubst_flags_t);
5993#define cxx_sizeof(T)  cxx_sizeof_or_alignof_type (T, SIZEOF_EXPR, true)
5994extern tree build_ptrmemfunc_access_expr        (tree, tree);
5995extern tree build_address                       (tree);
5996extern tree build_typed_address                 (tree, tree);
5997extern tree build_nop                           (tree, tree);
5998extern tree non_reference                       (tree);
5999extern tree lookup_anon_field                   (tree, tree);
6000extern bool invalid_nonstatic_memfn_p           (const_tree, tsubst_flags_t);
6001extern tree convert_member_func_to_ptr          (tree, tree, tsubst_flags_t);
6002extern tree convert_ptrmem                      (tree, tree, bool, bool,
6003                                                 tsubst_flags_t);
6004extern int lvalue_or_else                       (tree, enum lvalue_use,
6005                                                 tsubst_flags_t);
6006extern void check_template_keyword              (tree);
6007extern bool check_raw_literal_operator          (const_tree decl);
6008extern bool check_literal_operator_args         (const_tree, bool *, bool *);
6009extern void maybe_warn_about_useless_cast       (tree, tree, tsubst_flags_t);
6010extern tree cp_perform_integral_promotions      (tree, tsubst_flags_t);
6011
6012/* in typeck2.c */
6013extern void require_complete_eh_spec_types      (tree, tree);
6014extern void cxx_incomplete_type_diagnostic      (const_tree, const_tree, diagnostic_t);
6015#undef cxx_incomplete_type_error
6016extern void cxx_incomplete_type_error           (const_tree, const_tree);
6017#define cxx_incomplete_type_error(V,T) \
6018  (cxx_incomplete_type_diagnostic ((V), (T), DK_ERROR))
6019extern tree error_not_base_type                 (tree, tree);
6020extern tree binfo_or_else                       (tree, tree);
6021extern void cxx_readonly_error                  (tree, enum lvalue_use);
6022extern void complete_type_check_abstract        (tree);
6023extern int abstract_virtuals_error              (tree, tree);
6024extern int abstract_virtuals_error_sfinae       (tree, tree, tsubst_flags_t);
6025
6026extern tree store_init_value                    (tree, tree, vec<tree, va_gc>**, int);
6027extern void check_narrowing                     (tree, tree);
6028extern tree digest_init                         (tree, tree, tsubst_flags_t);
6029extern tree digest_init_flags                   (tree, tree, int);
6030extern tree build_scoped_ref                    (tree, tree, tree *);
6031extern tree build_x_arrow                       (location_t, tree,
6032                                                 tsubst_flags_t);
6033extern tree build_m_component_ref               (tree, tree, tsubst_flags_t);
6034extern tree build_functional_cast               (tree, tree, tsubst_flags_t);
6035extern tree add_exception_specifier             (tree, tree, int);
6036extern tree merge_exception_specifiers          (tree, tree, tree);
6037
6038/* in mangle.c */
6039extern void init_mangle                         (void);
6040extern void mangle_decl                         (tree);
6041extern const char *mangle_type_string           (tree);
6042extern tree mangle_typeinfo_for_type            (tree);
6043extern tree mangle_typeinfo_string_for_type     (tree);
6044extern tree mangle_vtbl_for_type                (tree);
6045extern tree mangle_vtt_for_type                 (tree);
6046extern tree mangle_ctor_vtbl_for_type           (tree, tree);
6047extern tree mangle_thunk                        (tree, int, tree, tree);
6048extern tree mangle_conv_op_name_for_type        (tree);
6049extern tree mangle_guard_variable               (tree);
6050extern tree mangle_tls_init_fn                  (tree);
6051extern tree mangle_tls_wrapper_fn               (tree);
6052extern bool decl_tls_wrapper_p                  (tree);
6053extern tree mangle_ref_init_variable            (tree);
6054
6055/* in dump.c */
6056extern bool cp_dump_tree                        (void *, tree);
6057
6058/* In cp/cp-objcp-common.c.  */
6059
6060extern alias_set_type cxx_get_alias_set         (tree);
6061extern bool cxx_warn_unused_global_decl         (const_tree);
6062extern size_t cp_tree_size                      (enum tree_code);
6063extern bool cp_var_mod_type_p                   (tree, tree);
6064extern void cxx_initialize_diagnostics          (diagnostic_context *);
6065extern int cxx_types_compatible_p               (tree, tree);
6066extern void init_shadowed_var_for_decl          (void);
6067extern bool cxx_block_may_fallthru              (const_tree);
6068
6069/* in cp-gimplify.c */
6070extern int cp_gimplify_expr                     (tree *, gimple_seq *,
6071                                                 gimple_seq *);
6072extern void cp_genericize                       (tree);
6073extern bool cxx_omp_const_qual_no_mutable       (tree);
6074extern enum omp_clause_default_kind cxx_omp_predetermined_sharing (tree);
6075extern tree cxx_omp_clause_default_ctor         (tree, tree, tree);
6076extern tree cxx_omp_clause_copy_ctor            (tree, tree, tree);
6077extern tree cxx_omp_clause_assign_op            (tree, tree, tree);
6078extern tree cxx_omp_clause_dtor                 (tree, tree);
6079extern void cxx_omp_finish_clause               (tree);
6080extern bool cxx_omp_privatize_by_reference      (const_tree);
6081
6082/* in name-lookup.c */
6083extern void suggest_alternatives_for            (location_t, tree);
6084extern tree strip_using_decl                    (tree);
6085
6086/* -- end of C++ */
6087
6088#endif /* ! GCC_CP_TREE_H */
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