| blob | 10e3079beed5b9bee1b85784c00b46ac12f6a262 |
1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2018 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
55 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_FIELD /* field */
61 };
96 static tree check_special_function_return_type
104 /* The following symbols are subsumed in the cp_global_trees array, and
105 listed here individually for documentation purposes.
107 C++ extensions
108 tree wchar_decl_node;
110 tree vtable_entry_type;
111 tree delta_type_node;
112 tree __t_desc_type_node;
114 tree class_type_node;
115 tree unknown_type_node;
117 Array type `vtable_entry_type[]'
119 tree vtbl_type_node;
120 tree vtbl_ptr_type_node;
122 Namespaces,
124 tree std_node;
125 tree abi_node;
127 A FUNCTION_DECL which can call `abort'. Not necessarily the
128 one that the user will declare, but sufficient to be called
129 by routines that want to abort the program.
131 tree abort_fndecl;
133 Used by RTTI
134 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
135 tree tinfo_var_id; */
139 #define local_names cp_function_chain->x_local_names
141 /* A list of objects which have constructors or destructors
142 which reside in the global scope. The decl is stored in
143 the TREE_VALUE slot and the initializer is stored
144 in the TREE_PURPOSE slot. */
145 tree static_aggregates;
147 /* Like static_aggregates, but for thread_local variables. */
148 tree tls_aggregates;
150 /* -- end of C++ */
152 /* A node for the integer constant 2. */
154 tree integer_two_node;
156 /* vector of static decls. */
159 /* vector of keyed classes. */
162 /* Used only for jumps to as-yet undefined labels, since jumps to
163 defined labels can have their validity checked immediately. */
167 /* The binding level to which this entry is *currently* attached.
168 This is initially the binding level in which the goto appeared,
169 but is modified as scopes are closed. */
171 /* The head of the names list that was current when the goto appeared,
172 or the inner scope popped. These are the decls that will *not* be
173 skipped when jumping to the label. */
174 tree names_in_scope;
175 /* The location of the goto, for error reporting. */
176 location_t o_goto_locus;
177 /* True if an OpenMP structured block scope has been closed since
178 the goto appeared. This means that the branch from the label will
179 illegally exit an OpenMP scope. */
181 };
183 /* A list of all LABEL_DECLs in the function that have names. Here so
184 we can clear out their names' definitions at the end of the
185 function, and so we can check the validity of jumps to these labels. */
195 /* The binding level to which the label is *currently* attached.
196 This is initially set to the binding level in which the label
197 is defined, but is modified as scopes are closed. */
200 /* The head of the names list that was current when the label was
201 defined, or the inner scope popped. These are the decls that will
202 be skipped when jumping to the label. */
203 tree names_in_scope;
205 /* A vector of all decls from all binding levels that would be
206 crossed by a backward branch to the label. */
209 /* A list of uses of the label, before the label is defined. */
212 /* The following bits are set after the label is defined, and are
213 updated as scopes are popped. They indicate that a jump to the
214 label will illegally enter a scope of the given flavor. */
220 };
222 #define named_labels cp_function_chain->x_named_labels
223 \f
224 /* The number of function bodies which we are currently processing.
225 (Zero if we are at namespace scope, one inside the body of a
226 function, two inside the body of a function in a local class, etc.) */
229 /* Whether the exception-specifier is part of a function type (i.e. C++17). */
232 /* States indicating how grokdeclarator() should handle declspecs marked
233 with __attribute__((deprecated)). An object declared as
234 __attribute__((deprecated)) suppresses warnings of uses of other
235 deprecated items. */
238 \f
239 /* A list of VAR_DECLs whose type was incomplete at the time the
240 variable was declared. */
243 tree decl;
244 tree incomplete_type;
245 };
249 \f
250 /* Returns the kind of template specialization we are currently
251 processing, given that it's declaration contained N_CLASS_SCOPES
252 explicit scope qualifications. */
254 tmpl_spec_kind
256 {
262 /* Scan through the template parameter scopes. */
266 {
267 /* If we see a specialization scope inside a parameter scope,
268 then something is wrong. That corresponds to a declaration
269 like:
271 template <class T> template <> ...
273 which is always invalid since [temp.expl.spec] forbids the
274 specialization of a class member template if the enclosing
275 class templates are not explicitly specialized as well. */
277 {
280 else
282 }
287 }
289 /* Handle explicit instantiations. */
291 {
293 /* We've seen a template parameter list during an explicit
294 instantiation. For example:
296 template <class T> template void f(int);
298 This is erroneous. */
300 else
302 }
305 /* We've not seen enough template headers to match all the
306 specialized classes present. For example:
308 template <class T> void R<T>::S<T>::f(int);
310 This is invalid; there needs to be one set of template
311 parameters for each class. */
314 /* We're processing a non-template declaration (even though it may
315 be a member of a template class.) For example:
317 template <class T> void S<T>::f(int);
319 The `class T' matches the `S<T>', leaving no template headers
320 corresponding to the `f'. */
323 /* We've got too many template headers. For example:
325 template <> template <class T> void f (T);
327 There need to be more enclosing classes. */
329 else
330 /* This must be a template. It's of the form:
332 template <class T> template <class U> void S<T>::f(U);
334 This is a specialization if the innermost level was a
335 specialization; otherwise it's just a definition of the
336 template. */
338 }
340 /* Exit the current scope. */
342 void
344 {
346 }
348 /* When a label goes out of scope, check to see if that label was used
349 in a valid manner, and issue any appropriate warnings or errors. */
351 static void
353 {
355 {
357 {
358 location_t location;
362 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
363 /* Avoid crashing later. */
365 }
366 else
368 }
369 }
371 /* Helper function to sort named label entries in a vector by DECL_UID. */
373 static int
375 {
379 /* DECL_UIDs can never be equal. */
381 }
383 /* At the end of a function, all labels declared within the function
384 go out of scope. BLOCK is the top-level block for the
385 function. */
387 static void
389 {
393 /* We need to add the labels to the block chain, so debug
394 information is emitted. But, we want the order to be stable so
395 need to sort them first. Otherwise the debug output could be
396 randomly ordered. I guess it's mostly stable, unless the hash
397 table implementation changes. */
402 {
409 }
414 {
421 }
422 }
424 /* At the end of a block with local labels, restore the outer definition. */
426 static void
428 {
436 else
437 {
440 }
442 }
444 /* The following two routines are used to interface to Objective-C++.
445 The binding level is purposely treated as an opaque type. */
449 {
451 }
453 /* The following routine is used by the NeXT-style SJLJ exceptions;
454 variables get marked 'volatile' so as to not be clobbered by
455 _setjmp()/_longjmp() calls. All variables in the current scope,
456 as well as parent scopes up to (but not including) ENCLOSING_BLK
457 shall be thusly marked. */
459 void
461 {
467 {
468 tree decl;
473 /* Do not climb up past the current function. */
476 }
477 }
479 /* True if B is the level for the condition of a constexpr if. */
481 static bool
483 {
487 }
489 /* Update data for defined and undefined labels when leaving a scope. */
491 int
493 {
498 {
499 tree decl;
501 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
502 TREE_LISTs representing OVERLOADs, so be careful. */
512 {
531 }
532 }
534 {
539 {
544 }
545 }
548 }
550 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
551 when errors were reported, except for -Werror-unused-but-set-*. */
554 /* Exit a binding level.
555 Pop the level off, and restore the state of the identifier-decl mappings
556 that were in effect when this level was entered.
558 If KEEP == 1, this level had explicit declarations, so
559 and create a "block" (a BLOCK node) for the level
560 to record its declarations and subblocks for symbol table output.
562 If FUNCTIONBODY is nonzero, this level is the body of a function,
563 so create a block as if KEEP were set and also clear out all
564 label names.
566 If REVERSE is nonzero, reverse the order of decls before putting
567 them into the BLOCK. */
569 tree
571 {
572 tree link;
573 /* The chain of decls was accumulated in reverse order.
574 Put it into forward order, just for cleanliness. */
575 tree decls;
576 tree subblocks;
577 tree block;
578 tree decl;
579 scope_kind kind;
582 restart:
595 /* We used to use KEEP == 2 to indicate that the new block should go
596 at the beginning of the list of blocks at this binding level,
597 rather than the end. This hack is no longer used. */
603 /* Any uses of undefined labels, and any defined labels, now operate
604 under constraints of next binding contour. */
609 /* Get the decls in the order they were written.
610 Usually current_binding_level->names is in reverse order.
611 But parameter decls were previously put in forward order. */
615 {
618 }
620 /* If there were any declarations or structure tags in that level,
621 or if this level is a function body,
622 create a BLOCK to record them for the life of this function. */
624 /* Avoid function body block if possible. */
630 {
633 }
635 /* In each subblock, record that this is its superior. */
640 /* Before we remove the declarations first check for unused variables. */
645 {
646 /* There are cases where D itself is a TREE_LIST. See in
647 push_local_binding where the list of decls returned by
648 getdecls is built. */
655 /* For structured bindings, consider only real variables, not
656 subobjects. */
664 {
666 {
669 OPT_Wunused_variable,
671 else
674 }
676 // For -Wunused-but-set-variable leave references alone.
679 {
684 else
686 OPT_Wunused_but_set_variable,
689 }
690 }
691 }
693 /* Remove declarations for all the DECLs in this level. */
695 {
699 /* Remove the binding. */
702 else
704 }
706 /* Restore the IDENTIFIER_TYPE_VALUEs. */
711 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
712 list if a `using' declaration put them there. The debugging
713 back ends won't understand OVERLOAD, so we remove them here.
714 Because the BLOCK_VARS are (temporarily) shared with
715 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
716 popped all the bindings. Also remove undeduced 'auto' decls,
717 which LTO doesn't understand, and can't have been used by anything. */
719 {
723 {
725 || (!processing_template_decl
728 else
730 }
731 }
733 /* If the level being exited is the top level of a function,
734 check over all the labels. */
736 {
738 {
739 /* Since this is the top level block of a function, the vars are
740 the function's parameters. Don't leave them in the BLOCK
741 because they are found in the FUNCTION_DECL instead. */
744 }
745 else
747 }
751 {
752 tree stmt;
754 /* If this is a temporary binding created for a cleanup, then we'll
755 have pushed a statement list level. Pop that, create a new
756 BIND_EXPR for the block, and insert it into the stream. */
760 }
764 {
765 /* The current function is being defined, so its DECL_INITIAL
766 should be error_mark_node. */
770 {
772 {
775 }
776 else
778 }
779 }
781 current_binding_level->blocks
784 /* If we did not make a block for the level just exited,
785 any blocks made for inner levels
786 (since they cannot be recorded as subblocks in that level)
787 must be carried forward so they will later become subblocks
788 of something else. */
790 current_binding_level->blocks
793 /* Each and every BLOCK node created here in `poplevel' is important
794 (e.g. for proper debugging information) so if we created one
795 earlier, mark it as "used". */
799 /* All temporary bindings created for cleanups are popped silently. */
805 }
807 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
808 /* Diagnose odr-used extern inline variables without definitions
809 in the current TU. */
811 int
813 {
815 {
816 tree decl;
819 {
829 OPT_Wunused_function,
838 }
840 /* Clear out the list, so we don't rescan next time. */
843 /* Write out any globals that need to be output. */
846 }
848 }
849 \f
850 /* In C++, you don't have to write `struct S' to refer to `S'; you
851 can just use `S'. We accomplish this by creating a TYPE_DECL as
852 if the user had written `typedef struct S S'. Create and return
853 the TYPE_DECL for TYPE. */
855 tree
857 {
858 tree decl;
862 /* There are other implicit type declarations, like the one *within*
863 a class that allows you to write `S::S'. We must distinguish
864 amongst these. */
870 }
872 /* Remember a local name for name-mangling purposes. */
874 static void
876 {
886 {
889 {
894 else
900 }
901 }
905 }
906 \f
907 /* Subroutine of duplicate_decls: return truthvalue of whether
908 or not types of these decls match.
910 For C++, we must compare the parameter list so that `int' can match
911 `int&' in a parameter position, but `int&' is not confused with
912 `const int&'. */
914 int
916 {
923 /* If the two DECLs are not even the same kind of thing, we're not
924 interested in their types. */
930 {
935 tree r2;
937 /* Specializations of different templates are different functions
938 even if they have the same type. */
953 /* A new declaration doesn't match a built-in one unless it
954 is also extern "C". */
962 /* A declaration with deduced return type should use its pre-deduction
963 type for declaration matching. */
967 {
970 #ifndef NO_IMPLICIT_EXTERN_C
973 #endif
974 ))
975 {
979 }
980 #ifndef NO_IMPLICIT_EXTERN_C
988 {
991 }
992 #endif
993 else
994 types_match =
1000 }
1001 else
1004 /* The decls dont match if they correspond to two different versions
1005 of the same function. Disallow extern "C" functions to be
1006 versions for now. */
1010 && record_versions
1015 }
1017 {
1031 else
1032 // We don't need to check equivalently_constrained for variable and
1033 // function templates because we check it on the results.
1035 }
1036 else
1037 {
1038 /* Need to check scope for variable declaration (VAR_DECL).
1039 For typedef (TYPE_DECL), scope is ignored. */
1042 /* [dcl.link]
1043 Two declarations for an object with C language linkage
1044 with the same name (ignoring the namespace that qualify
1045 it) that appear in different namespace scopes refer to
1046 the same object. */
1056 else
1059 COMPARE_REDECLARATION);
1060 }
1062 // Normal functions can be constrained, as can variable partial
1063 // specializations.
1068 }
1070 /* NEWDECL and OLDDECL have identical signatures. If they are
1071 different versions adjust them and return true.
1072 If RECORD is set to true, record function versions. */
1074 bool
1076 {
1081 {
1085 }
1088 {
1092 }
1098 }
1100 /* If NEWDECL is `static' and an `extern' was seen previously,
1101 warn about it. OLDDECL is the previous declaration.
1103 Note that this does not apply to the C++ case of declaring
1104 a variable `extern const' and then later `const'.
1106 Don't complain about built-in functions, since they are beyond
1107 the user's control. */
1109 void
1111 {
1118 /* Don't get confused by static member functions; that's a different
1119 use of `static'. */
1124 /* If the old declaration was `static', or the new one isn't, then
1125 everything is OK. */
1129 /* It's OK to declare a builtin function as `static'. */
1138 }
1140 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1141 function templates. If their exception specifications do not
1142 match, issue a diagnostic. */
1144 static void
1146 tree old_decl)
1147 {
1151 /* Two default specs are equivalent, don't force evaluation. */
1157 {
1160 }
1164 /* [except.spec]
1166 If any declaration of a function has an exception-specification,
1167 all declarations, including the definition and an explicit
1168 specialization, of that function shall have an
1169 exception-specification with the same set of type-ids. */
1172 {
1180 /* We used to silently permit mismatched eh specs with
1181 -fno-exceptions, so make them a pedwarn now. */
1183 else
1188 }
1189 }
1191 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1192 Otherwise issue diagnostics. */
1194 static bool
1196 {
1206 {
1208 {
1209 /* Hide a built-in declaration. */
1213 }
1214 /* 7.1.5 [dcl.constexpr]
1215 Note: An explicit specialization can differ from the template
1216 declaration with respect to the constexpr specifier. */
1222 "redeclaration %qD differs in %<constexpr%> "
1227 }
1229 }
1231 // If OLDDECL and NEWDECL are concept declarations with the same type
1232 // (i.e., and template parameters), but different requirements,
1233 // emit diagnostics and return true. Otherwise, return false.
1236 {
1248 {
1253 {
1256 }
1257 }
1259 }
1261 /* DECL is a redeclaration of a function or function template. If
1262 it does have default arguments issue a diagnostic. Note: this
1263 function is used to enforce the requirements in C++11 8.3.6 about
1264 no default arguments in redeclarations. */
1266 static void
1268 {
1274 {
1276 "redeclaration of %q#D may not have default "
1279 }
1280 }
1282 /* Merge tree bits that correspond to attributes noreturn, nothrow,
1283 const, malloc, and pure from NEWDECL with those of OLDDECL. */
1285 static void
1287 {
1300 }
1302 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1304 DECL_ATTRIBUTES (fn)))
1306 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1307 If the redeclaration is invalid, a diagnostic is issued, and the
1308 error_mark_node is returned. Otherwise, OLDDECL is returned.
1310 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1311 returned.
1313 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1315 tree
1317 {
1321 tree new_template_info;
1328 /* If either the type of the new decl or the type of the old decl is an
1329 error_mark_node, then that implies that we have already issued an
1330 error (earlier) for some bogus type specification, and in that case,
1331 it is rather pointless to harass the user with yet more error message
1332 about the same declaration, so just pretend the types match here. */
1341 {
1352 }
1354 /* True to merge attributes between the declarations, false to
1355 set OLDDECL's attributes to those of NEWDECL (for template
1356 explicit specializations that specify their own attributes
1357 independent of those specified for the primary template). */
1365 && merge_attr
1367 {
1371 else
1374 }
1376 /* Check for redeclaration and other discrepancies. */
1379 {
1382 {
1383 /* Avoid warnings redeclaring built-ins which have not been
1384 explicitly declared. */
1386 {
1390 OPT_Wbuiltin_declaration_mismatch,
1392 newdecl);
1394 }
1396 /* If you declare a built-in or predefined function name as static,
1397 the old definition is overridden, but optionally warn this was a
1398 bad choice of name. */
1400 {
1405 /* Discard the old built-in function. */
1407 }
1408 /* If the built-in is not ansi, then programs can override
1409 it even globally without an error. */
1414 else
1418 }
1420 {
1427 }
1429 {
1430 /* Avoid warnings redeclaring built-ins which have not been
1431 explicitly declared. */
1433 {
1436 /* A new declaration doesn't match a built-in one unless it
1437 is also extern "C". */
1447 {
1450 /* FILE, tm types are not known at the time
1451 we create the builtins. */
1457 {
1464 {
1472 newdecl_is_friend);
1474 }
1476 }
1480 next_arg:;
1481 }
1484 OPT_Wbuiltin_declaration_mismatch,
1485 "declaration of %q#D conflicts with built-in "
1487 }
1492 {
1493 /* Don't really override olddecl for __* prefixed builtins
1494 except for __[^b]*_chk, the compiler might be using those
1495 explicitly. */
1497 {
1509 {
1511 {
1513 "definition of %q#D ambiguates built-in "
1516 }
1518 "new declaration %q#D ambiguates built-in"
1524 }
1525 }
1527 /* A near match; override the builtin. */
1531 OPT_Wbuiltin_declaration_mismatch,
1532 "new declaration %q#D ambiguates built-in "
1534 else
1539 }
1540 else
1541 /* Discard the old built-in function. */
1544 /* Replace the old RTL to avoid problems with inlining. */
1546 }
1547 /* Even if the types match, prefer the new declarations type for
1548 built-ins which have not been explicitly declared, for
1549 exception lists, etc... */
1551 {
1558 }
1560 /* If a function is explicitly declared "throw ()", propagate that to
1561 the corresponding builtin. */
1566 {
1571 }
1573 /* Whether or not the builtin can throw exceptions has no
1574 bearing on this declarator. */
1578 {
1579 /* If a builtin function is redeclared as `static', merge
1580 the declarations, but make the original one static. */
1584 /* Make the old declaration consistent with the new one so
1585 that all remnants of the builtin-ness of this function
1586 will be banished. */
1589 }
1590 }
1592 {
1593 /* C++ Standard, 3.3, clause 4:
1594 "[Note: a namespace name or a class template name must be unique
1595 in its declarative region (7.3.2, clause 14). ]" */
1602 {
1607 {
1608 /* We do nothing special here, because C++ does such nasty
1609 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1610 get shadowed, and know that if we need to find a TYPE_DECL
1611 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1612 slot of the identifier. */
1614 }
1621 }
1630 }
1632 {
1634 /* These are certainly not duplicate declarations; they're
1635 from different scopes. */
1639 {
1640 /* The name of a class template may not be declared to refer to
1641 any other template, class, function, object, namespace, value,
1642 or type in the same scope. */
1645 {
1650 }
1657 /* Template functions can be disambiguated by
1658 return type. */
1661 // Template functions can also be disambiguated by
1662 // constraints.
1664 {
1668 }
1672 }
1674 {
1676 {
1678 newdecl);
1682 }
1683 /* For function versions, params and types match, but they
1684 are not ambiguous. */
1687 // The functions have the same parameter types.
1690 // And the same constraints.
1692 {
1697 }
1698 else
1700 }
1701 else
1702 {
1707 }
1708 }
1718 /* It's OK to have a template specialization and a non-template
1719 with the same type, or to have specializations of two
1720 different templates with the same type. Note that if one is a
1721 specialization, and the other is an instantiation of the same
1722 template, that we do not exit at this point. That situation
1723 can occur if we instantiate a template class, and then
1724 specialize one of its methods. This situation is valid, but
1725 the declarations must be merged in the usual way. */
1732 /* One of the declarations is a template instantiation, and the
1733 other is not a template at all. That's OK. */
1736 {
1737 /* In [namespace.alias] we have:
1739 In a declarative region, a namespace-alias-definition can be
1740 used to redefine a namespace-alias declared in that declarative
1741 region to refer only to the namespace to which it already
1742 refers.
1744 Therefore, if we encounter a second alias directive for the same
1745 alias, we can just ignore the second directive. */
1751 /* Leave it to update_binding to merge or report error. */
1753 }
1754 else
1755 {
1758 {
1766 }
1771 {
1772 /* Prototype decl follows defn w/o prototype. */
1777 }
1780 {
1781 /* [dcl.link]
1782 If two declarations of the same function or object
1783 specify different linkage-specifications ..., the program
1784 is ill-formed.... Except for functions with C++ linkage,
1785 a function declaration without a linkage specification
1786 shall not precede the first linkage specification for
1787 that function. A function can be declared without a
1788 linkage specification after an explicit linkage
1789 specification has been seen; the linkage explicitly
1790 specified in the earlier declaration is not affected by
1791 such a function declaration.
1793 DR 563 raises the question why the restrictions on
1794 functions should not also apply to objects. Older
1795 versions of G++ silently ignore the linkage-specification
1796 for this example:
1798 namespace N {
1799 extern int i;
1800 extern "C" int i;
1801 }
1803 which is clearly wrong. Therefore, we now treat objects
1804 like functions. */
1806 {
1807 /* There is no explicit linkage-specification, so we use
1808 the linkage from the previous declaration. */
1811 }
1812 else
1813 {
1819 }
1820 }
1823 ;
1825 {
1826 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1829 as FUNCTION_DECLs. */
1831 /* C++11 8.3.6/6.
1832 Default arguments for a member function of a class
1833 template shall be specified on the initial declaration
1834 of the member function within the class template. */
1837 else
1838 {
1846 {
1849 {
1851 "default argument given for parameter "
1855 olddecl);
1856 }
1857 else
1858 {
1863 olddecl);
1864 }
1865 }
1866 }
1867 }
1868 }
1870 /* Do not merge an implicit typedef with an explicit one. In:
1872 class A;
1873 ...
1874 typedef class A A __attribute__ ((foo));
1876 the attribute should apply only to the typedef. */
1882 /* If new decl is `static' and an `extern' was seen previously,
1883 warn about it. */
1889 /* We have committed to returning 1 at this point. */
1891 {
1892 /* Now that functions must hold information normally held
1893 by field decls, there is extra work to do so that
1894 declaration information does not get destroyed during
1895 definition. */
1913 /* Optionally warn about more than one declaration for the same
1914 name, but don't warn about a function declaration followed by a
1915 definition. */
1918 /* Don't warn about extern decl followed by definition. */
1920 /* Don't warn about friends, let add_friend take care of it. */
1922 /* Don't warn about declaration followed by specialization. */
1925 {
1927 OPT_Wredundant_decls,
1929 newdecl))
1932 }
1936 {
1938 {
1942 }
1944 }
1945 }
1947 /* Deal with C++: must preserve virtual function table size. */
1949 {
1959 }
1961 /* Copy all the DECL_... slots specified in the new decl except for
1962 any that we copy here from the old type. */
1966 else
1970 {
1976 {
1979 }
1980 }
1983 {
1984 tree old_result;
1985 tree new_result;
1997 {
1998 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1999 declarations of a function template. */
2008 {
2011 else
2023 }
2024 else
2025 {
2033 }
2034 }
2036 /* If the new declaration is a definition, update the file and
2037 line information on the declaration, and also make
2038 the old declaration the same definition. */
2040 {
2046 {
2047 tree parm;
2053 }
2054 }
2057 }
2060 {
2064 /* Automatically handles default parameters. */
2066 tree newtype;
2068 /* For typedefs use the old type, as the new type's DECL_NAME points
2069 at newdecl, which will be ggc_freed. */
2071 {
2072 /* But NEWTYPE might have an attribute, honor that. */
2077 {
2081 }
2083 /* And remove the new type from the variants list. */
2085 {
2090 {
2093 }
2094 }
2095 }
2098 else
2102 {
2104 /* For already initialized vars, TREE_READONLY could have been
2105 cleared in cp_finish_decl, because the var needs runtime
2106 initialization or destruction. Make sure not to set
2107 TREE_READONLY on it again. */
2123 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2126 {
2127 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2130 }
2131 }
2133 /* An explicit specialization of a function template or of a member
2134 function of a class template can be declared transaction_safe
2135 independently of whether the corresponding template entity is declared
2136 transaction_safe. */
2149 /* Lay the type out, unless already done. */
2163 /* Merge deprecatedness. */
2167 /* Preserve function specific target and optimization options */
2169 {
2179 }
2180 else
2181 {
2182 /* Merge the const type qualifier. */
2185 /* Merge the volatile type qualifier. */
2188 }
2190 /* Merge the initialization information. */
2193 {
2197 {
2200 }
2201 }
2204 {
2214 else
2215 {
2216 /* Merge the noreturn bit. */
2222 }
2223 /* Keep the old RTL. */
2225 }
2228 {
2229 /* Keep the old RTL. We cannot keep the old RTL if the old
2230 declaration was for an incomplete object and the new
2231 declaration is not since many attributes of the RTL will
2232 change. */
2234 }
2235 }
2236 /* If cannot merge, then use the new type and qualifiers,
2237 and don't preserve the old rtl. */
2238 else
2239 {
2240 /* Clean out any memory we had of the old declaration. */
2250 }
2252 /* Merge the storage class information. */
2265 {
2274 {
2281 }
2284 {
2288 }
2293 /* If the OLDDECL is an instantiation and/or specialization,
2294 then the NEWDECL must be too. But, it may not yet be marked
2295 as such if the caller has created NEWDECL, but has not yet
2296 figured out that it is a redeclaration. */
2300 /* Don't really know how much of the language-specific
2301 values we should copy from old to new. */
2308 {
2312 {
2316 /* Remember the presence of explicit specialization args. */
2319 }
2321 }
2322 /* Only functions have these fields. */
2324 {
2329 /* DECL_THUNKS is only valid for virtual functions,
2330 otherwise it is a DECL_FRIEND_CONTEXT. */
2333 }
2334 /* Only variables have this field. */
2338 }
2341 {
2342 tree parm;
2344 /* Merge parameter attributes. */
2353 }
2357 {
2358 /* If newdecl is not a specialization, then it is not a
2359 template-related function at all. And that means that we
2360 should have exited above, returning 0. */
2364 /* From [temp.expl.spec]:
2366 If a template, a member template or the member of a class
2367 template is explicitly specialized then that
2368 specialization shall be declared before the first use of
2369 that specialization that would cause an implicit
2370 instantiation to take place, in every translation unit in
2371 which such a use occurs. */
2373 olddecl);
2379 /* Don't propagate visibility from the template to the
2380 specialization here. We'll do that in determine_visibility if
2381 appropriate. */
2384 /* [temp.expl.spec/14] We don't inline explicit specialization
2385 just because the primary template says so. */
2395 }
2397 {
2398 /* Never inline re-defined extern inline functions.
2399 FIXME: this could be better handled by keeping both
2400 function as separate declarations. */
2402 }
2403 else
2404 {
2406 {
2410 }
2412 ;
2426 }
2428 /* Preserve abstractness on cloned [cd]tors. */
2431 /* Update newdecl's parms to point at olddecl. */
2437 {
2441 }
2443 {
2444 /* These need to be copied so that the names are available.
2445 Note that if the types do match, we'll preserve inline
2446 info and other bits, but if not, we won't. */
2449 }
2450 /* If redeclaring a builtin function, it stays built in
2451 if newdecl is a gnu_inline definition, or if newdecl is just
2452 a declaration. */
2455 {
2458 /* If we're keeping the built-in definition, keep the rtl,
2459 regardless of declaration matches. */
2462 {
2465 {
2466 /* If a compatible prototype of these builtin functions
2467 is seen, assume the runtime implements it with the
2468 expected semantics. */
2477 }
2478 }
2481 }
2483 /* If defining a function declared with other language
2484 linkage, use the previously declared language linkage. */
2487 {
2489 /* Don't clear out the arguments if we're just redeclaring a
2490 function. */
2493 }
2494 }
2498 /* Now preserve various other info from the definition. */
2504 /* Warn about conflicting visibility specifications. */
2508 {
2510 "%qD: visibility attribute ignored because it "
2514 }
2515 /* Choose the declaration which specified visibility. */
2517 {
2520 }
2521 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2522 so keep this behavior. */
2524 {
2527 }
2528 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2530 {
2533 }
2542 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2543 with that from NEWDECL below. */
2545 {
2549 }
2551 /* Merge the USED information. */
2557 {
2562 }
2568 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2569 to olddecl and deleted. */
2572 {
2573 /* Set the flag for newdecl so that it gets copied to olddecl. */
2575 /* newdecl will be purged after copying to olddecl and is no longer
2576 a version. */
2578 }
2581 {
2595 /* Preserve symtab node mapping. */
2599 /* If newdecl is a template instantiation, it is possible that
2600 the following sequence of events has occurred:
2602 o A friend function was declared in a class template. The
2603 class template was instantiated.
2605 o The instantiation of the friend declaration was
2606 recorded on the instantiation list, and is newdecl.
2608 o Later, however, instantiate_class_template called pushdecl
2609 on the newdecl to perform name injection. But, pushdecl in
2610 turn called duplicate_decls when it discovered that another
2611 declaration of a global function with the same name already
2612 existed.
2614 o Here, in duplicate_decls, we decided to clobber newdecl.
2616 If we're going to do that, we'd better make sure that
2617 olddecl, and not newdecl, is on the list of
2618 instantiations so that if we try to do the instantiation
2619 again we won't get the clobbered declaration. */
2621 new_template_info,
2622 olddecl);
2623 }
2624 else
2625 {
2632 {
2640 {
2653 }
2661 }
2662 }
2665 {
2669 {
2670 /* Merge the section attribute.
2671 We want to issue an error if the sections conflict but that must be
2672 done later in decl_attributes since we are called before attributes
2673 are assigned. */
2678 {
2682 else
2686 }
2687 }
2691 {
2695 }
2696 }
2702 {
2705 }
2707 /* NEWDECL contains the merged attribute lists.
2708 Update OLDDECL to be the same. */
2711 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2712 so that encode_section_info has a chance to look at the new decl
2713 flags and attributes. */
2720 /* The NEWDECL will no longer be needed. Because every out-of-class
2721 declaration of a member results in a call to duplicate_decls,
2722 freeing these nodes represents in a significant savings.
2724 Before releasing the node, be sore to remove function from symbol
2725 table that might have been inserted there to record comdat group.
2726 Be sure to however do not free DECL_STRUCT_FUNCTION because this
2727 structure is shared in between newdecl and oldecl. */
2731 {
2735 }
2737 /* Remove the associated constraints for newdecl, if any, before
2738 reclaiming memory. */
2745 }
2746 \f
2747 /* Return zero if the declaration NEWDECL is valid
2748 when the declaration OLDDECL (assumed to be for the same name)
2749 has already been seen.
2750 Otherwise return an error message format string with a %s
2751 where the identifier should go. */
2755 {
2757 {
2758 /* Because C++ can put things into name space for free,
2759 constructs like "typedef struct foo { ... } foo"
2760 would look like an erroneous redeclaration. */
2763 else
2765 }
2767 {
2768 /* If this is a pure function, its olddecl will actually be
2769 the original initialization to `0' (which we force to call
2770 abort()). Don't complain about redefinition in this case. */
2775 /* If both functions come from different namespaces, this is not
2776 a redeclaration - this is a conflict with a used function. */
2782 /* We'll complain about linkage mismatches in
2783 warn_extern_redeclared_static. */
2785 /* Defining the same name twice is no good. */
2788 {
2794 }
2797 {
2802 {
2806 else
2809 }
2810 }
2812 check_abi_tag_redeclaration
2817 }
2819 {
2823 {
2828 }
2846 {
2851 {
2855 else
2858 }
2859 }
2861 /* Core issue #226 (C++0x):
2863 If a friend function template declaration specifies a
2864 default template-argument, that declaration shall be a
2865 definition and shall be the only declaration of the
2866 function template in the translation unit. */
2877 }
2883 {
2884 /* Only variables can be thread-local, and all declarations must
2885 agree on this property. */
2889 else
2892 }
2894 {
2895 /* The objects have been declared at namespace scope. If either
2896 is a member of an anonymous union, then this is an invalid
2897 redeclaration. For example:
2899 int i;
2900 union { int i; };
2902 is invalid. */
2906 /* If at least one declaration is a reference, there is no
2907 conflict. For example:
2909 int i = 3;
2910 extern int i;
2912 is valid. */
2916 /* Static data member declared outside a class definition
2917 if the variable is defined within the class with constexpr
2918 specifier is declaration rather than definition (and
2919 deprecated). */
2925 {
2927 /* For now, only warn with explicit -Wdeprecated. */
2930 "redundant redeclaration of %<constexpr%> static "
2935 }
2937 /* Reject two definitions. */
2939 }
2940 else
2941 {
2942 /* Objects declared with block scope: */
2943 /* Reject two definitions, and reject a definition
2944 together with an external reference. */
2948 }
2949 }
2950 \f
2952 /* Hash and equality functions for the named_label table. */
2954 hashval_t
2956 {
2958 }
2960 bool
2962 {
2964 }
2966 /* Look for a label named ID in the current function. If one cannot
2967 be found, create one. Return the named_label_entry, or NULL on
2968 failure. */
2972 {
2973 /* You can't use labels at global scope. */
2975 {
2978 }
2984 named_label_entry **slot
2989 {
2994 {
2998 }
2999 }
3001 /* We are making a new decl, create or reuse the named_label_entry */
3005 else
3006 {
3011 }
3013 /* Now create the LABEL_DECL. */
3019 {
3023 }
3028 }
3030 /* Wrapper for lookup_label_1. */
3032 tree
3034 {
3039 }
3041 tree
3043 {
3048 }
3050 /* Returns nonzero if it is ill-formed to jump past the declaration of
3051 DECL. Returns 2 if it's also a real problem. */
3053 static int
3055 {
3056 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
3057 with automatic storage duration is not in scope to a point where it is
3058 in scope is ill-formed unless the variable has scalar type, class type
3059 with a trivial default constructor and a trivial destructor, a
3060 cv-qualified version of one of these types, or an array of one of the
3061 preceding types and is declared without an initializer (8.5). */
3076 }
3078 /* A subroutine of check_previous_goto_1 and check_goto to identify a branch
3079 to the user. */
3081 static bool
3083 diagnostic_t diag_kind)
3084 {
3085 bool complained
3092 }
3094 /* Check that a single previously seen jump to a newly defined label
3095 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
3096 the jump context; NAMES are the names in scope in LEVEL at the jump
3097 context; LOCUS is the source position of the jump or 0. Returns
3098 true if all is well. */
3100 static bool
3103 {
3110 {
3116 }
3119 {
3125 {
3131 {
3133 DK_PERMERROR);
3135 }
3137 {
3141 else
3143 " enters scope of %q#D, which has "
3145 }
3146 }
3154 {
3181 {
3185 }
3190 }
3193 {
3199 }
3200 }
3203 }
3205 static void
3207 {
3211 }
3213 static bool
3215 {
3217 }
3219 /* Check that a new jump to a label DECL is OK. Called by
3220 finish_goto_stmt. */
3222 void
3224 {
3225 /* We can't know where a computed goto is jumping.
3226 So we assume that it's OK. */
3230 /* We didn't record any information about this label when we created it,
3231 and there's not much point since it's trivial to analyze as a return. */
3236 named_label_entry **slot
3240 /* If the label hasn't been defined yet, defer checking. */
3242 {
3243 /* Don't bother creating another use if the last goto had the
3244 same data, and will therefore create the same set of errors. */
3249 named_label_use_entry *new_use
3259 }
3263 tree bad;
3269 {
3277 }
3280 {
3284 {
3285 /* Can't skip init of __exception_info. */
3287 {
3291 }
3295 }
3297 {
3301 else
3303 " enters scope of %q#D which has "
3305 }
3306 }
3309 {
3318 }
3321 {
3324 }
3327 {
3331 {
3333 {
3338 }
3342 }
3343 }
3344 }
3346 /* Check that a return is ok wrt OpenMP structured blocks.
3347 Called by finish_return_stmt. Returns true if all is well. */
3349 bool
3351 {
3354 {
3357 }
3361 }
3363 /* Define a label, specifying the location in the source file.
3364 Return the LABEL_DECL node for the label. */
3366 static tree
3368 {
3369 /* After labels, make any new cleanups in the function go into their
3370 own new (temporary) binding contour. */
3380 {
3383 }
3384 else
3385 {
3386 /* Mark label as having been defined. */
3388 /* Say where in the source. */
3397 }
3400 }
3402 /* Wrapper for define_label_1. */
3404 tree
3406 {
3411 }
3414 struct cp_switch
3415 {
3418 /* The SWITCH_STMT being built. */
3419 tree switch_stmt;
3420 /* A splay-tree mapping the low element of a case range to the high
3421 element, or NULL_TREE if there is no high element. Used to
3422 determine whether or not a new case label duplicates an old case
3423 label. We need a tree, rather than simply a hash table, because
3424 of the GNU case range extension. */
3425 splay_tree cases;
3426 /* Remember whether there was a case value that is outside the
3427 range of the original type of the controlling expression. */
3429 /* Remember whether a default: case label has been seen. */
3431 /* Remember whether a BREAK_STMT has been seen in this SWITCH_STMT. */
3433 /* Set if inside of {FOR,DO,WHILE}_BODY nested inside of a switch,
3434 where BREAK_STMT doesn't belong to the SWITCH_STMT. */
3436 };
3438 /* A stack of the currently active switch statements. The innermost
3439 switch statement is on the top of the stack. There is no need to
3440 mark the stack for garbage collection because it is only active
3441 during the processing of the body of a function, and we never
3442 collect at that point. */
3446 /* Called right after a switch-statement condition is parsed.
3447 SWITCH_STMT is the switch statement being parsed. */
3449 void
3451 {
3462 }
3464 void
3466 {
3468 location_t switch_location;
3470 /* Emit warnings as needed. */
3472 const bool bool_cond_p
3481 /* For the benefit of block_may_fallthru remember if the switch body
3482 case labels cover all possible values and if there are break; stmts. */
3484 || (!processing_template_decl
3494 }
3496 /* Note that a BREAK_STMT is about to be added. If it is inside of
3497 a SWITCH_STMT and not inside of a loop body inside of it, note
3498 in switch_stack we've seen a BREAK_STMT. */
3500 void
3502 {
3505 }
3507 /* Note the start of processing of an iteration statement's body.
3508 The note_break_stmt function will do nothing while processing it.
3509 Return a flag that should be passed to note_iteration_stmt_body_end. */
3511 bool
3513 {
3519 }
3521 /* Note the end of processing of an iteration statement's body. */
3523 void
3525 {
3528 }
3530 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3531 condition. Note that if TYPE and VALUE are already integral we don't
3532 really do the conversion because the language-independent
3533 warning/optimization code will work better that way. */
3535 static tree
3537 {
3546 {
3549 value = (perform_implicit_conversion_flags
3552 }
3554 }
3556 /* Note that we've seen a definition of a case label, and complain if this
3557 is a bad place for one. */
3559 tree
3561 {
3564 tree type;
3570 {
3571 tree label;
3573 /* For templates, just add the case label; we'll do semantic
3574 analysis at instantiation-time. */
3577 }
3579 /* Find the condition on which this switch statement depends. */
3596 /* After labels, make any new cleanups in the function go into their
3597 own new (temporary) binding contour. */
3604 }
3605 \f
3607 tree scope;
3608 tree name;
3609 tree template_id;
3612 };
3615 {
3618 /* Hash a TYPENAME_TYPE. */
3620 static hashval_t
3622 {
3623 hashval_t hash;
3629 }
3631 /* Compare two TYPENAME_TYPEs. */
3633 static bool
3635 {
3641 }
3642 };
3644 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3645 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3647 Returns the new TYPENAME_TYPE. */
3651 tree
3654 {
3655 tree t;
3656 tree d;
3657 typename_info ti;
3659 hashval_t hash;
3674 /* See if we already have this type. */
3678 else
3679 {
3680 /* Build the TYPENAME_TYPE. */
3687 /* Build the corresponding TYPE_DECL. */
3694 /* Store it in the hash table. */
3697 /* TYPENAME_TYPEs must always be compared structurally, because
3698 they may or may not resolve down to another type depending on
3699 the currently open classes. */
3701 }
3704 }
3706 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3707 provided to name the type. Returns an appropriate type, unless an
3708 error occurs, in which case error_mark_node is returned. If we
3709 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3710 return that, rather than the _TYPE it corresponds to, in other
3711 cases we look through the type decl. If TF_ERROR is set, complain
3712 about errors, otherwise be quiet. */
3714 tree
3716 tsubst_flags_t complain)
3717 {
3718 tree fullname;
3719 tree t;
3728 {
3733 else
3734 /* Create a TEMPLATE_ID_EXPR for the type. */
3738 }
3745 {
3750 {
3754 }
3755 }
3757 {
3761 }
3766 {
3770 }
3772 /* When the CONTEXT is a dependent type, NAME could refer to a
3773 dependent base class of CONTEXT. But look inside it anyway
3774 if CONTEXT is a currently open scope, in case it refers to a
3775 member of the current instantiation or a non-dependent base;
3776 lookup will stop when we hit a dependent base. */
3778 /* We should only set WANT_TYPE when we're a nested typename type.
3779 Then we can give better diagnostics if we find a non-type. */
3781 else
3790 {
3792 {
3795 else
3798 }
3800 }
3802 /* Pull out the template from an injected-class-name (or multiple). */
3807 {
3809 {
3812 }
3814 }
3817 {
3822 }
3824 {
3829 }
3834 /* If we are currently parsing a template and if T is a typedef accessed
3835 through CONTEXT then we need to remember and check access of T at
3836 template instantiation time. */
3851 }
3853 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3854 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3855 in which case error_mark_node is returned.
3857 If PARM_LIST is non-NULL, also make sure that the template parameter
3858 list of TEMPLATE_DECL matches.
3860 If COMPLAIN zero, don't complain about any errors that occur. */
3862 tree
3864 tsubst_flags_t complain)
3865 {
3866 tree t;
3867 tree d;
3877 {
3887 {
3891 }
3895 {
3897 {
3901 }
3903 }
3906 complain))
3910 }
3912 /* Build the UNBOUND_CLASS_TEMPLATE. */
3918 /* Build the corresponding TEMPLATE_DECL. */
3927 }
3929 \f
3931 /* Push the declarations of builtin types into the global namespace.
3932 RID_INDEX is the index of the builtin type in the array
3933 RID_POINTERS. NAME is the name used when looking up the builtin
3934 type. TYPE is the _TYPE node for the builtin type.
3936 The calls to set_global_binding below should be
3937 eliminated. Built-in types should not be looked up name; their
3938 names are keywords that the parser can recognize. However, there
3939 is code in c-common.c that uses identifier_global_value to look up
3940 built-in types by name. */
3942 void
3945 tree type)
3946 {
3950 {
3956 }
3961 {
3967 }
3970 {
3974 }
3975 }
3977 /* Push a type into the namespace so that the back ends ignore it. */
3979 static void
3981 {
3984 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3991 }
3993 /* Create all the predefined identifiers. */
3995 static void
3997 {
3998 struct predefined_identifier
3999 {
4003 };
4005 /* A table of identifiers to create at startup. */
4009 /* Some of these names have a trailing space so that it is
4010 impossible for them to conflict with names written by users. */
4027 /* The demangler expects anonymous namespaces to be called
4028 something starting with '_GLOBAL__N_'. It no longer needs
4029 to be unique to the TU. */
4035 };
4039 {
4041 /* Some of these identifiers already have a special kind. */
4044 }
4045 }
4047 /* Create the predefined scalar types of C,
4048 and some nodes representing standard constants (0, 1, (void *)0).
4049 Initialize the global binding level.
4050 Make definitions for built-in primitive functions. */
4052 void
4054 {
4055 tree void_ftype;
4056 tree void_ftype_ptr;
4058 /* Create all the identifiers we need. */
4061 /* Create the global variables. */
4066 /* Enter the global namespace. */
4069 void_type_node);
4073 /* Remember whether we want the empty class passing ABI change warning
4074 in this TU. */
4077 debug_hooks->register_main_translation_unit
4085 /* Initially, C. */
4088 /* Create the `std' namespace. */
4099 /* Guess at the initial static decls size. */
4102 /* ... and keyed classes. */
4114 NULL_TREE);
4116 #if 0
4118 #endif
4127 void_ftype_ptr
4130 /* Create the conversion operator marker. This operator's DECL_NAME
4131 is in the identifier table, so we can use identifier equality to
4132 find it. */
4134 void_ftype);
4136 /* C++ extensions */
4141 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
4144 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
4145 result. */
4152 {
4153 /* Make sure we get a unique function type, so we can give
4154 its pointer type a name. (This wins for gdb.) */
4161 }
4164 vtbl_type_node
4183 /* Now, C++. */
4188 {
4191 }
4197 {
4200 tree ptr_ftype_sizetype;
4201 tree new_eh_spec;
4203 ptr_ftype_sizetype
4206 {
4207 tree bad_alloc_id;
4208 tree bad_alloc_type_node;
4209 tree bad_alloc_decl;
4215 bad_alloc_decl
4220 new_eh_spec
4222 }
4223 else
4226 /* Ensure attribs.c is initialized. */
4229 /* Ensure constraint.cc is initialized. */
4233 NULL_TREE);
4236 extvisattr);
4250 {
4251 /* Also push the sized deallocation variants:
4252 void operator delete(void*, std::size_t) throw();
4253 void operator delete[](void*, std::size_t) throw(); */
4254 tree void_ftype_ptr_size
4258 extvisattr);
4262 }
4265 {
4272 /* operator new (size_t, align_val_t); */
4284 /* operator delete (void *, align_val_t); */
4293 {
4294 /* operator delete (void *, size_t, align_val_t); */
4297 NULL_TREE);
4302 }
4303 }
4315 }
4317 abort_fndecl
4321 /* Perform other language dependent initializations. */
4335 /* Show we use EH for cleanups. */
4338 }
4340 /* Generate an initializer for a function naming variable from
4341 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4342 filled in with the type of the init. */
4344 tree
4346 {
4348 tree type;
4353 {
4357 }
4366 else
4370 }
4372 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4373 the decl, LOC is the location to give the decl, NAME is the
4374 initialization string and TYPE_DEP indicates whether NAME depended
4375 on the type of the function. We make use of that to detect
4376 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4377 at the point of first use, so we mustn't push the decl now. */
4379 static tree
4381 {
4384 tree type;
4398 {
4402 LOOKUP_ONLYCONVERTING);
4403 }
4404 else
4405 {
4408 }
4411 }
4413 static tree
4415 {
4423 /* Runtime library routines are, by definition, available in an
4424 external shared object. */
4430 /* A function in the user's namespace should have an explicit
4431 declaration before it is used. Mark the built-in function as
4432 anticipated but not actually declared. */
4436 {
4439 /* Treat __*_chk fortification functions as anticipated as well,
4440 unless they are __builtin_*. */
4445 }
4449 else
4453 }
4455 tree
4457 {
4460 /* All builtins that don't begin with an '_' should additionally
4461 go in the 'std' namespace. */
4463 {
4468 }
4471 }
4473 /* Like cxx_builtin_function, but guarantee the function is added to the global
4474 scope. This is to allow function specific options to add new machine
4475 dependent builtins when the target ISA changes via attribute((target(...)))
4476 which saves space on program startup if the program does not use non-generic
4477 ISAs. */
4479 tree
4481 {
4485 /* All builtins that don't begin with an '_' should additionally
4486 go in the 'std' namespace. */
4488 {
4493 }
4496 }
4498 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4499 function. Not called directly. */
4501 static tree
4504 {
4512 /* Runtime library routines are, by definition, available in an
4513 external shared object. */
4518 }
4520 /* Returns the _DECL for a library function with C++ linkage. */
4522 static tree
4525 {
4530 }
4532 /* Like build_library_fn, but takes a C string instead of an
4533 IDENTIFIER_NODE. */
4535 tree
4537 {
4539 }
4541 /* Like build_cp_library_fn, but takes a C string instead of an
4542 IDENTIFIER_NODE. */
4544 tree
4546 {
4548 ecf_flags);
4549 }
4551 /* Like build_library_fn, but also pushes the function so that we will
4552 be able to find it via get_global_binding. Also, the function
4553 may throw exceptions listed in RAISES. */
4555 tree
4557 {
4558 tree fn;
4566 }
4568 /* Like build_cp_library_fn, but also pushes the function so that it
4569 will be found by normal lookup. */
4571 static tree
4574 {
4581 }
4583 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4584 a FUNCTION_TYPE. */
4586 tree
4588 {
4591 }
4593 /* Like push_library_fn, but also note that this function throws
4594 and does not return. Used for __throw_foo and the like. */
4596 tree
4598 {
4601 }
4602 \f
4603 /* When we call finish_struct for an anonymous union, we create
4604 default copy constructors and such. But, an anonymous union
4605 shouldn't have such things; this function undoes the damage to the
4606 anonymous union type T.
4608 (The reason that we create the synthesized methods is that we don't
4609 distinguish `union { int i; }' from `typedef union { int i; } U'.
4610 The first is an anonymous union; the second is just an ordinary
4611 union type.) */
4613 void
4615 {
4616 /* Wipe out memory of synthesized methods. */
4624 /* Splice the implicitly generated functions out of TYPE_FIELDS. */
4628 else
4631 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4632 assignment operators (because they cannot have these methods themselves).
4633 For anonymous unions this is already checked because they are not allowed
4634 in any union, otherwise we have to check it. */
4636 {
4641 {
4644 {
4654 }
4655 }
4656 }
4657 }
4659 /* Warn for an attribute located at LOCATION that appertains to the
4660 class type CLASS_TYPE that has not been properly placed after its
4661 class-key, in it class-specifier. */
4663 void
4665 tree class_type)
4666 {
4670 "attribute ignored in declaration "
4675 }
4677 /* Make sure that a declaration with no declarator is well-formed, i.e.
4678 just declares a tagged type or anonymous union.
4680 Returns the type declared; or NULL_TREE if none. */
4682 tree
4685 {
4688 /* If a class, struct, or enum type is declared by the DECLSPECS
4689 (i.e, if a class-specifier, enum-specifier, or non-typename
4690 elaborated-type-specifier appears in the DECLSPECS),
4691 DECLARED_TYPE is set to the corresponding type. */
4698 {
4704 }
4717 {
4719 "%<auto%> can only be specified for variables "
4722 }
4723 /* Check for an anonymous union. */
4726 {
4727 /* 7/3 In a simple-declaration, the optional init-declarator-list
4728 can be omitted only when declaring a class (clause 9) or
4729 enumeration (7.2), that is, when the decl-specifier-seq contains
4730 either a class-specifier, an elaborated-type-specifier with
4731 a class-key (9.1), or an enum-specifier. In these cases and
4732 whenever a class-specifier or enum-specifier is present in the
4733 decl-specifier-seq, the identifiers in these specifiers are among
4734 the names being declared by the declaration (as class-name,
4735 enum-names, or enumerators, depending on the syntax). In such
4736 cases, and except for the declaration of an unnamed bit-field (9.6),
4737 the decl-specifier-seq shall introduce one or more names into the
4738 program, or shall redeclare a name introduced by a previous
4739 declaration. [Example:
4740 enum { }; // ill-formed
4741 typedef class { }; // ill-formed
4742 --end example] */
4744 {
4747 }
4754 }
4756 else
4757 {
4765 && (!current_class_type
4774 "a storage class can only be specified for objects "
4778 "%<const%> can only be specified for objects and "
4782 "%<volatile%> can only be specified for objects and "
4786 "%<__restrict%> can only be specified for objects and "
4790 "%<__thread%> can only be specified for objects "
4798 }
4801 {
4802 location_t loc;
4805 /* For a non-template class, use the name location. */
4807 else
4808 /* For a template class (an explicit instantiation), use the
4809 current location. */
4813 /* [dcl.attr.grammar]/4:
4815 No attribute-specifier-seq shall appertain to an explicit
4816 instantiation. */
4817 {
4820 declared_type))
4822 "no attribute can be applied to "
4824 }
4825 else
4827 }
4830 }
4832 /* Called when a declaration is seen that contains no names to declare.
4833 If its type is a reference to a structure, union or enum inherited
4834 from a containing scope, shadow that tag name for the current scope
4835 with a forward reference.
4836 If its type defines a new named structure or union
4837 or defines an enum, it is valid but we need not do anything here.
4838 Otherwise, it is an error.
4840 C++: may have to grok the declspecs to learn about static,
4841 complain for anonymous unions.
4843 Returns the TYPE declared -- or NULL_TREE if none. */
4845 tree
4847 {
4857 /* This is where the variables in an anonymous union are
4858 declared. An anonymous union declaration looks like:
4859 union { ... } ;
4860 because there is no declarator after the union, the parser
4861 sends that declaration here. */
4863 {
4867 {
4871 }
4872 }
4875 }
4876 \f
4877 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4879 tree
4883 {
4884 tree attrs;
4885 tree type;
4886 enum decl_context context
4892 {
4897 /* A template type parameter or other dependent type. */
4900 else
4902 }
4904 }
4906 /* Process a DECLARATOR for a function-scope variable declaration,
4907 namespace-scope variable declaration, or function declaration.
4908 (Function definitions go through start_function; class member
4909 declarations appearing in the body of the class go through
4910 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4911 If an error occurs, the error_mark_node is returned instead.
4913 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4914 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4915 for an explicitly defaulted function, or SD_DELETED for an explicitly
4916 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4917 implicitly initialized via a default constructor. ATTRIBUTES and
4918 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4920 The scope represented by the context of the returned DECL is pushed
4921 (if it is not the global namespace) and is assigned to
4922 *PUSHED_SCOPE_P. The caller is then responsible for calling
4923 pop_scope on *PUSHED_SCOPE_P if it is set. */
4925 tree
4929 tree attributes,
4930 tree prefix_attributes,
4932 {
4933 tree decl;
4934 tree context;
4941 /* An object declared as __attribute__((deprecated)) suppresses
4942 warnings of uses of other deprecated items. */
4961 /* Is it valid for this decl to have an initializer at all?
4962 If not, set INITIALIZED to zero, which will indirectly
4963 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4966 {
4969 }
4972 {
4976 decl);
4980 }
4986 /* If this is a typedef that names the class for linkage purposes
4987 (7.1.3p8), apply any attributes directly to the type. */
4992 else
4995 /* Set attributes here so if duplicate decl, will have proper attributes. */
4998 /* Dllimported symbols cannot be defined. Static data members (which
4999 can be initialized in-class and dllimported) go through grokfield,
5000 not here, so we don't need to exclude those decls when checking for
5001 a definition. */
5003 {
5006 }
5008 /* If #pragma weak was used, mark the decl weak now. */
5020 {
5024 {
5034 {
5040 }
5041 else
5042 {
5047 {
5054 }
5055 /* Static data member are tricky; an in-class initialization
5056 still doesn't provide a definition, so the in-class
5057 declaration will have DECL_EXTERNAL set, but will have an
5058 initialization. Thus, duplicate_decls won't warn
5059 about this situation, and so we check here. */
5068 }
5069 }
5070 else
5071 {
5073 this_tmpl
5074 ? current_template_parms
5080 }
5082 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
5084 /* Do not mark DECL as an explicit specialization if it was not
5085 already marked as an instantiation; a declaration should
5086 never be marked as a specialization unless we know what
5087 template is being specialized. */
5089 {
5094 else
5097 /* [temp.expl.spec] An explicit specialization of a static data
5098 member of a template is a definition if the declaration
5099 includes an initializer; otherwise, it is a declaration.
5101 We check for processing_specialization so this only applies
5102 to the new specialization syntax. */
5105 }
5108 /* Aliases are definitions. */
5111 decl);
5112 }
5116 /* Enter this declaration into the symbol table. Don't push the plain
5117 VAR_DECL for a variable template. */
5130 {
5131 /* This is a const variable with implicit 'static'. Set
5132 DECL_THIS_STATIC so we can tell it from variables that are
5133 !TREE_PUBLIC because of the anonymous namespace. */
5136 }
5140 {
5144 decl);
5147 else
5151 }
5157 }
5159 /* Process the declaration of a variable DECL. INITIALIZED is true
5160 iff DECL is explicitly initialized. (INITIALIZED is false if the
5161 variable is initialized via an implicitly-called constructor.)
5162 This function must be called for ordinary variables (including, for
5163 example, implicit instantiations of templates), but must not be
5164 called for template declarations. */
5166 void
5168 {
5169 tree type;
5184 /* If an explicit initializer is present, or if this is a definition
5185 of an aggregate, then we need a complete type at this point.
5186 (Scalars are always complete types, so there is nothing to
5187 check.) This code just sets COMPLETE_P; errors (if necessary)
5188 are issued below. */
5190 && !complete_p
5192 {
5194 /* We will not yet have set TREE_READONLY on DECL if the type
5195 was "const", but incomplete, before this point. But, now, we
5196 have a complete type, so we can try again. */
5198 }
5201 /* Is it valid for this decl to have an initializer at all? */
5202 {
5203 /* Don't allow initializations for incomplete types except for
5204 arrays which might be completed by the initialization. */
5210 {
5213 }
5215 {
5218 /* else we already gave an error in start_decl. */
5219 }
5220 }
5222 {
5225 else
5226 {
5228 decl);
5229 /* Change the type so that assemble_variable will give
5230 DECL an rtl we can live with: (mem (const_int 0)). */
5232 }
5233 }
5235 /* Create a new scope to hold this declaration if necessary.
5236 Whether or not a new scope is necessary cannot be determined
5237 until after the type has been completed; if the type is a
5238 specialization of a class template it is not until after
5239 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
5240 will be set correctly. */
5242 }
5244 /* Handle initialization of references. DECL, TYPE, and INIT have the
5245 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
5246 but will be set to a new CLEANUP_STMT if a temporary is created
5247 that must be destroyed subsequently.
5249 Returns an initializer expression to use to initialize DECL, or
5250 NULL if the initialization can be performed statically.
5252 Quotes on semantics can be found in ARM 8.4.3. */
5254 static tree
5256 {
5258 {
5264 }
5268 tf_warning_or_error);
5273 /* Note: default conversion is only called in very special cases. */
5276 /* check_initializer handles this for non-reference variables, but for
5277 references we need to do it here or the initializer will get the
5278 incomplete array type and confuse later calls to
5279 cp_complete_array_type. */
5284 {
5288 }
5290 /* Convert INIT to the reference type TYPE. This may involve the
5291 creation of a temporary, whose lifetime must be the same as that
5292 of the reference. If so, a DECL_EXPR for the temporary will be
5293 added just after the DECL_EXPR for DECL. That's why we don't set
5294 DECL_INITIAL for local references (instead assigning to them
5295 explicitly); we need to allow the temporary to be initialized
5296 first. */
5298 tf_warning_or_error);
5299 }
5301 /* Designated initializers in arrays are not supported in GNU C++.
5302 The parser cannot detect this error since it does not know whether
5303 a given brace-enclosed initializer is for a class type or for an
5304 array. This function checks that CE does not use a designated
5305 initializer. If it does, an error is issued. Returns true if CE
5306 is valid, i.e., does not have a designated initializer. */
5308 bool
5311 {
5312 /* Designated initializers for array elements are not supported. */
5314 {
5315 /* The parser only allows identifiers as designated
5316 initializers. */
5318 {
5322 }
5324 {
5328 }
5336 {
5337 /* A C99 designator is OK if it matches the current index. */
5339 {
5342 }
5343 else
5345 }
5346 else
5351 }
5354 }
5356 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5357 array until we finish parsing the initializer. If that's the
5358 situation we're in, update DECL accordingly. */
5360 static void
5362 {
5368 {
5369 /* do_default is really a C-ism to deal with tentative definitions.
5370 But let's leave it here to ease the eventual merge. */
5375 /* Check that there are no designated initializers in INIT, as
5376 those are not supported in GNU C++, and as the middle-end
5377 will crash if presented with a non-numeric designated
5378 initializer. */
5380 {
5383 HOST_WIDE_INT i;
5385 {
5390 }
5391 }
5395 else
5396 {
5398 do_default);
5400 {
5404 }
5406 {
5408 {
5411 }
5412 /* If a `static' var's size isn't known, make it extern as
5413 well as static, so it does not get allocated. If it's not
5414 `static', then don't mark it extern; finish_incomplete_decl
5415 will give it a default size and it will get allocated. */
5418 }
5420 {
5423 }
5424 }
5429 }
5430 }
5432 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5433 any appropriate error messages regarding the layout. */
5435 static void
5437 {
5438 tree type;
5444 /* If we haven't already laid out this declaration, do so now.
5445 Note that we must not call complete type for an external object
5446 because it's type might involve templates that we are not
5447 supposed to instantiate yet. (And it's perfectly valid to say
5448 `extern X x' for some incomplete type `X'.) */
5457 {
5458 /* An automatic variable with an incomplete type: that is an error.
5459 Don't talk about array types here, since we took care of that
5460 message in grokdeclarator. */
5464 }
5465 #if 0
5466 /* Keep this code around in case we later want to control debug info
5467 based on whether a type is "used". (jason 1999-11-11) */
5470 /* Let debugger know it should output info for this type. */
5475 #endif
5480 {
5483 else
5484 {
5488 }
5489 }
5490 }
5492 /* If a local static variable is declared in an inline function, or if
5493 we have a weak definition, we must endeavor to create only one
5494 instance of the variable at link-time. */
5496 void
5498 {
5499 /* Static data in a function with comdat linkage also has comdat
5500 linkage. */
5502 /* Don't mess with __FUNCTION__. */
5507 {
5509 {
5510 /* With weak symbols, we simply make the variable COMDAT;
5511 that will cause copies in multiple translations units to
5512 be merged. */
5514 }
5515 else
5516 {
5519 {
5520 /* Without weak symbols, we can use COMMON to merge
5521 uninitialized variables. */
5524 }
5525 else
5526 {
5527 /* While for initialized variables, we must use internal
5528 linkage -- which means that multiple copies will not
5529 be merged. */
5535 "%q#D are wrong (you%'ll wind up with "
5537 else
5539 "static data %q#D are wrong (you%'ll wind "
5545 }
5546 }
5547 }
5548 }
5550 /* Issue an error message if DECL is an uninitialized const variable.
5551 CONSTEXPR_CONTEXT_P is true when the function is called in a constexpr
5552 context from potential_constant_expression. Returns true if all is well,
5553 false otherwise. */
5555 bool
5557 tsubst_flags_t complain)
5558 {
5561 /* ``Unless explicitly declared extern, a const object does not have
5562 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5563 7.1.6 */
5566 && (constexpr_context_p
5569 {
5575 {
5577 {
5581 }
5582 else
5583 {
5587 "uninitialized variable %qD in %<constexpr%> "
5590 }
5591 }
5595 decl);
5598 {
5599 tree defaulted_ctor;
5606 "constructor is not user-provided because it is "
5609 "and the implicitly-defined constructor does not "
5611 }
5614 }
5617 }
5618 \f
5619 /* Structure holding the current initializer being processed by reshape_init.
5620 CUR is a pointer to the current element being processed, END is a pointer
5621 after the last element present in the initializer. */
5622 struct reshape_iter
5623 {
5626 };
5630 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5631 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5632 initialized. If there are no more such fields, the return value
5633 will be NULL. */
5635 tree
5637 {
5646 }
5648 /* Return true for [dcl.init.list] direct-list-initialization from
5649 single element of enumeration with a fixed underlying type. */
5651 bool
5653 {
5662 }
5664 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5665 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5666 INTEGER_CST representing the size of the array minus one (the maximum index),
5667 or NULL_TREE if the array was declared without specifying the size. D is
5668 the iterator within the constructor. */
5670 static tree
5672 tsubst_flags_t complain)
5673 {
5674 tree new_init;
5679 /* The initializer for an array is always a CONSTRUCTOR. */
5683 {
5684 /* Minus 1 is used for zero sized arrays. */
5690 /* sizetype is sign extended, not zero extended. */
5691 else
5693 }
5695 /* Loop until there are no more initializers. */
5699 {
5700 tree elt_init;
5705 complain);
5713 /* This can happen with an invalid initializer (c++/54501). */
5716 }
5719 }
5721 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5722 Parameters are the same of reshape_init_r. */
5724 static tree
5726 {
5735 }
5737 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5738 Parameters are the same of reshape_init_r. */
5740 static tree
5742 {
5748 {
5751 {
5756 }
5759 }
5761 /* For a vector, we initialize it as an array of the appropriate size. */
5766 }
5768 /* Subroutine of reshape_init_r, processes the initializers for classes
5769 or union. Parameters are the same of reshape_init_r. */
5771 static tree
5773 tsubst_flags_t complain)
5774 {
5775 tree field;
5776 tree new_init;
5780 /* The initializer for a class is always a CONSTRUCTOR. */
5785 {
5786 /* [dcl.init.aggr]
5788 An initializer for an aggregate member that is an
5789 empty class shall have the form of an empty
5790 initializer-list {}. */
5792 {
5796 }
5798 }
5800 /* Loop through the initializable fields, gathering initializers. */
5802 {
5803 tree field_init;
5806 /* Handle designated initializers, as an extension. */
5808 {
5813 {
5814 /* We already reshaped this. */
5816 {
5822 }
5823 }
5826 else
5827 {
5832 }
5835 {
5840 }
5841 }
5843 /* If we processed all the member of the class, we are done. */
5853 {
5854 /* This can happen with an invalid initializer for a flexible
5855 array member (c++/54441). */
5859 }
5863 /* [dcl.init.aggr]
5865 When a union is initialized with a brace-enclosed
5866 initializer, the braces shall only contain an
5867 initializer for the first member of the union. */
5872 }
5875 }
5877 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5878 designators are not valid; either complain or return true to indicate
5879 that reshape_init_r should return error_mark_node. */
5881 static bool
5883 {
5885 {
5889 else
5891 }
5893 }
5895 /* Subroutine of reshape_init, which processes a single initializer (part of
5896 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5897 iterator within the CONSTRUCTOR which points to the initializer to process.
5898 FIRST_INITIALIZER_P is true if this is the first initializer of the
5899 outermost CONSTRUCTOR node. */
5901 static tree
5903 tsubst_flags_t complain)
5904 {
5915 {
5916 /* A complex type can be initialized from one or two initializers,
5917 but braces are not elided. */
5920 {
5922 {
5925 else
5927 }
5928 }
5930 {
5938 }
5940 }
5942 /* A non-aggregate type is always initialized with a single
5943 initializer. */
5945 {
5946 /* It is invalid to initialize a non-aggregate type with a
5947 brace-enclosed initializer before C++0x.
5948 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5949 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5950 a CONSTRUCTOR (with a record type). */
5952 /* Don't complain about a capture-init. */
5955 {
5957 {
5959 /* Isn't value-initialization. */
5961 {
5964 type);
5966 }
5967 }
5968 else
5970 }
5974 }
5976 /* "If T is a class type and the initializer list has a single element of
5977 type cv U, where U is T or a class derived from T, the object is
5978 initialized from that element." Even if T is an aggregate. */
5980 && first_initializer_p
5983 {
5986 }
5988 /* [dcl.init.aggr]
5990 All implicit type conversions (clause _conv_) are considered when
5991 initializing the aggregate member with an initializer from an
5992 initializer-list. If the initializer can initialize a member,
5993 the member is initialized. Otherwise, if the member is itself a
5994 non-empty subaggregate, brace elision is assumed and the
5995 initializer is considered for the initialization of the first
5996 member of the subaggregate. */
5998 /* But don't try this for the first initializer, since that would be
5999 looking through the outermost braces; A a2 = { a1 }; is not a
6000 valid aggregate initialization. */
6001 && !first_initializer_p
6004 complain)))
6005 {
6008 }
6010 /* [dcl.init.string]
6012 A char array (whether plain char, signed char, or unsigned char)
6013 can be initialized by a string-literal (optionally enclosed in
6014 braces); a wchar_t array can be initialized by a wide
6015 string-literal (optionally enclosed in braces). */
6018 {
6021 /* Strip one level of braces if and only if they enclose a single
6022 element (as allowed by [dcl.init.string]). */
6026 {
6028 }
6030 /* If it's a string literal, then it's the initializer for the array
6031 as a whole. Otherwise, continue with normal initialization for
6032 array types (one value per array element). */
6034 {
6039 }
6040 }
6042 /* The following cases are about aggregates. If we are not within a full
6043 initializer already, and there is not a CONSTRUCTOR, it means that there
6044 is a missing set of braces (that is, we are processing the case for
6045 which reshape_init exists). */
6047 {
6049 {
6051 /* There is no need to reshape pointer-to-member function
6052 initializers, as they are always constructed correctly
6053 by the front end. */
6054 ;
6056 /* For a nested compound literal, there is no need to reshape since
6057 brace elision is not allowed. Even if we decided to allow it,
6058 we should add a call to reshape_init in finish_compound_literal,
6059 before calling digest_init, so changing this code would still
6060 not be necessary. */
6062 else
6063 {
6067 }
6068 }
6073 type);
6074 }
6076 /* Dispatch to specialized routines. */
6083 else
6085 }
6087 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
6088 brace-enclosed aggregate initializer.
6090 INIT is the CONSTRUCTOR containing the list of initializers describing
6091 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
6092 It may not presently match the shape of the TYPE; for example:
6094 struct S { int a; int b; };
6095 struct S a[] = { 1, 2, 3, 4 };
6097 Here INIT will hold a vector of four elements, rather than a
6098 vector of two elements, each itself a vector of two elements. This
6099 routine transforms INIT from the former form into the latter. The
6100 revised CONSTRUCTOR node is returned. */
6102 tree
6104 {
6106 reshape_iter d;
6107 tree new_init;
6113 /* An empty constructor does not need reshaping, and it is always a valid
6114 initializer. */
6118 /* Handle [dcl.init.list] direct-list-initialization from
6119 single element of enumeration with a fixed underlying type. */
6121 {
6125 {
6129 }
6130 else
6132 }
6134 /* Recurse on this CONSTRUCTOR. */
6142 /* Make sure all the element of the constructor were used. Otherwise,
6143 issue an error about exceeding initializers. */
6145 {
6149 }
6156 }
6158 /* Verify array initializer. Returns true if errors have been reported. */
6160 bool
6162 {
6165 /* The array type itself need not be complete, because the
6166 initializer may tell us how many elements are in the array.
6167 But, the elements of the array must be complete. */
6169 {
6173 else
6176 }
6177 /* A compound literal can't have variable size. */
6181 {
6184 }
6186 }
6188 /* Subroutine of check_initializer; args are passed down from that function.
6189 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
6191 static tree
6194 {
6197 }
6199 /* Verify INIT (the initializer for DECL), and record the
6200 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
6201 grok_reference_init.
6203 If the return value is non-NULL, it is an expression that must be
6204 evaluated dynamically to initialize DECL. */
6206 static tree
6208 {
6211 tree core_type;
6213 /* Things that are going to be initialized need to have complete
6214 type. */
6218 {
6219 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
6220 it doesn't have storage to be initialized. */
6223 }
6226 /* We will have already complained. */
6230 {
6233 }
6235 {
6240 }
6241 else
6242 /* There is no way to make a variable-sized class type in GNU C++. */
6246 {
6249 {
6251 {
6254 }
6256 {
6258 "scalar object %qD requires one element in "
6262 }
6263 }
6264 }
6267 {
6274 }
6276 ;
6279 {
6281 {
6284 }
6287 tf_warning_or_error);
6288 /* Do not reshape constructors of vectors (they don't need to be
6289 reshaped. */
6291 {
6293 {
6295 tf_warning_or_error);
6297 }
6299 {
6300 /* Don't reshape if the class has constructors. */
6303 "in C++98 %qD must be initialized by "
6305 decl);
6306 }
6308 {
6311 }
6312 else
6313 {
6316 }
6317 }
6321 {
6324 /* We get here with code like `int a (2);' */
6326 tf_warning_or_error);
6327 }
6329 /* If DECL has an array type without a specific bound, deduce the
6330 array size from the initializer. */
6344 {
6347 /* A constructor call is a non-trivial initializer even if
6348 it isn't explicitly written. */
6352 /* If this is a constexpr initializer, expand_default_init will
6353 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6354 case, pull the initializer back out and pass it down into
6355 store_init_value. */
6360 {
6363 /* Don't call digest_init; it's unnecessary and will complain
6364 about aggregate initialization of non-aggregate classes. */
6366 }
6368 {
6369 /* Declared constexpr, but no suitable initializer; massage
6370 init appropriately so we can pass it into store_init_value
6371 for the error. */
6374 {
6378 }
6380 }
6381 else
6383 }
6386 {
6387 /* In aggregate initialization of a variable, each element
6388 initialization is a full-expression because there is no
6389 enclosing expression. */
6404 }
6405 }
6406 else
6407 {
6415 tf_warning_or_error);
6416 }
6422 {
6423 /* We might have set these in cp_finish_decl. */
6426 }
6432 {
6440 else
6444 {
6448 }
6450 }
6453 }
6455 /* If DECL is not a local variable, give it RTL. */
6457 static void
6459 {
6463 /* Set the DECL_ASSEMBLER_NAME for the object. */
6465 {
6466 /* The `register' keyword, when used together with an
6467 asm-specification, indicates that the variable should be
6468 placed in a particular register. */
6470 {
6473 }
6474 else
6475 {
6480 }
6481 }
6483 /* Handle non-variables up front. */
6485 {
6488 }
6490 /* If we see a class member here, it should be a static data
6491 member. */
6493 {
6495 /* An in-class declaration of a static data member should be
6496 external; it is only a declaration, and not a definition. */
6501 }
6503 /* We don't create any RTL for local variables. */
6507 /* We defer emission of local statics until the corresponding
6508 DECL_EXPR is expanded. But with constexpr its function might never
6509 be expanded, so go ahead and tell cgraph about the variable now. */
6514 /* Defer template instantiations. */
6519 /* If we're not deferring, go ahead and assemble the variable. */
6522 }
6524 /* walk_tree helper for wrap_temporary_cleanups, below. */
6526 static tree
6528 {
6529 /* Stop at types or full-expression boundaries. */
6532 {
6535 }
6538 {
6543 /* Tell honor_protect_cleanup_actions to handle this as a separate
6544 cleanup. */
6548 }
6551 }
6553 /* We're initializing a local variable which has a cleanup GUARD. If there
6554 are any temporaries used in the initializer INIT of this variable, we
6555 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6556 variable will be cleaned up properly if one of them throws.
6558 Unfortunately, there's no way to express this properly in terms of
6559 nesting, as the regions for the temporaries overlap the region for the
6560 variable itself; if there are two temporaries, the variable needs to be
6561 the first thing destroyed if either of them throws. However, we only
6562 want to run the variable's cleanup if it actually got constructed. So
6563 we need to guard the temporary cleanups with the variable's cleanup if
6564 they are run on the normal path, but not if they are run on the
6565 exceptional path. We implement this by telling
6566 honor_protect_cleanup_actions to strip the variable cleanup from the
6567 exceptional path. */
6569 static void
6571 {
6573 }
6575 /* Generate code to initialize DECL (a local variable). */
6577 static void
6579 {
6581 tree cleanup;
6589 {
6590 /* If we used it already as memory, it must stay in memory. */
6594 }
6599 /* Compute and store the initial value. */
6604 /* Generate a cleanup, if necessary. */
6607 /* Perform the initialization. */
6609 {
6613 {
6614 /* Stick simple initializers in DECL_INITIAL so that
6615 -Wno-init-self works (c++/34772). */
6620 {
6624 OPT_Winit_self,
6626 }
6627 }
6628 else
6629 {
6632 /* If we're only initializing a single object, guard the
6633 destructors of any temporaries used in its initializer with
6634 its destructor. This isn't right for arrays because each
6635 element initialization is a full-expression. */
6644 saved_stmts_are_full_exprs_p;
6645 }
6646 }
6648 /* Set this to 0 so we can tell whether an aggregate which was
6649 initialized was ever used. Don't do this if it has a
6650 destructor, so we don't complain about the 'resource
6651 allocation is initialization' idiom. Now set
6652 attribute((unused)) on types so decls of that type will be
6653 marked used. (see TREE_USED, above.) */
6655 && ! already_used
6664 }
6666 /* DECL is a VAR_DECL for a compiler-generated variable with static
6667 storage duration (like a virtual table) whose initializer is a
6668 compile-time constant. Initialize the variable and provide it to the
6669 back end. */
6671 void
6673 {
6674 tree init;
6684 }
6686 /* INIT is the initializer for a variable, as represented by the
6687 parser. Returns true iff INIT is value-dependent. */
6689 static bool
6691 {
6693 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6696 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6697 {
6710 }
6711 else
6712 /* It must be a simple expression, e.g., int i = 3; */
6716 }
6718 // Returns true if a DECL is VAR_DECL with the concept specifier.
6721 {
6723 // Not all variables have DECL_LANG_SPECIFIC.
6726 }
6728 /* A helper function to be called via walk_tree. If any label exists
6729 under *TP, it is (going to be) forced. Set has_forced_label_in_static. */
6731 static tree
6733 {
6739 }
6741 /* Finish processing of a declaration;
6742 install its line number and initial value.
6743 If the length of an array type is not known before,
6744 it must be determined now, from the initial value, or it is an error.
6746 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6747 true, then INIT is an integral constant expression.
6749 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6750 if the (init) syntax was used. */
6752 void
6755 {
6756 tree type;
6761 tree auto_node;
6766 {
6770 }
6773 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6780 /* Warn about register storage specifiers except when in GNU global
6781 or local register variable extension. */
6783 {
6786 "ISO C++17 does not allow %<register%> storage "
6788 else
6791 }
6793 /* If a name was specified, get the string. */
6806 /* Do auto deduction unless decl is a function or an uninstantiated
6807 template specialization. */
6814 {
6815 tree d_init;
6820 {
6824 tf_warning_or_error);
6826 }
6836 {
6841 }
6843 }
6846 {
6849 {
6852 }
6853 }
6861 {
6862 tree clone;
6864 {
6865 /* FIXME check this is 1st decl. */
6870 {
6874 }
6876 }
6878 {
6881 else
6883 }
6884 }
6887 {
6889 /* If DECL is a reference, then we want to know whether init is a
6890 reference constant; init_const_expr_p as passed tells us whether
6891 it's an rvalue constant. */
6895 {
6896 /* Set these flags now for templates. We'll update the flags in
6897 store_init_value for instantiations. */
6900 /* FIXME setting TREE_CONSTANT on refs breaks the back end. */
6903 }
6904 }
6907 {
6910 /* Add this declaration to the statement-tree. */
6917 {
6920 }
6922 /* Generally, initializers in templates are expanded when the
6923 template is instantiated. But, if DECL is a variable constant
6924 then it can be used in future constant expressions, so its value
6925 must be available. */
6932 {
6935 }
6937 && init_const_expr_p
6941 {
6942 /* This variable seems to be a non-dependent constant, so process
6943 its initializer. If check_initializer returns non-null the
6944 initialization wasn't constant after all. */
6945 tree init_code;
6951 }
6953 {
6954 /* Deduce array size even if the initializer is dependent. */
6956 /* And complain about multiple initializers. */
6960 tf_warning_or_error);
6961 }
6964 {
6968 }
6970 {
6973 }
6975 }
6977 /* Just store non-static data member initializers for later. */
6981 /* Take care of TYPE_DECLs up front. */
6983 {
6986 {
6990 }
6992 /* If we have installed this as the canonical typedef for this
6993 type, and that type has not been defined yet, delay emitting
6994 the debug information for it, as we will emit it later. */
7000 at_eof);
7002 }
7004 /* A reference will be modified here, as it is initialized. */
7008 {
7011 }
7014 {
7015 /* If this is a local variable that will need a mangled name,
7016 register it now. We must do this before processing the
7017 initializer for the variable, since the initialization might
7018 require a guard variable, and since the mangled name of the
7019 guard variable will depend on the mangled name of this
7020 variable. */
7024 {
7026 /* Normally has_forced_label_in_static is set during GIMPLE
7027 lowering, but [cd]tors are never actually compiled directly.
7028 We need to set this early so we can deal with the label
7029 address extension. */
7033 {
7036 }
7037 /* And make sure it's in the symbol table for
7038 c_parse_final_cleanups to find. */
7040 }
7042 /* Convert the initializer to the type of DECL, if we have not
7043 already initialized DECL. */
7045 /* If !DECL_EXTERNAL then DECL is being defined. In the
7046 case of a static data member initialized inside the
7047 class-specifier, there can be an initializer even if DECL
7048 is *not* defined. */
7050 {
7054 /* Handle:
7056 [dcl.init]
7058 The memory occupied by any object of static storage
7059 duration is zero-initialized at program startup before
7060 any other initialization takes place.
7062 We cannot create an appropriate initializer until after
7063 the type of DECL is finalized. If DECL_INITIAL is set,
7064 then the DECL is statically initialized, and any
7065 necessary zero-initialization has already been performed. */
7070 /* Remember that the initialization for this variable has
7071 taken place. */
7073 /* This declaration is the definition of this variable,
7074 unless we are initializing a static data member within
7075 the class specifier. */
7078 }
7079 /* If the variable has an array type, lay out the type, even if
7080 there is no initializer. It is valid to index through the
7081 array, and we must get TYPE_ALIGN set correctly on the array
7082 type. */
7089 /* So decl is a global variable or a static member of a
7090 non local class. Record the types it uses
7091 so that we can decide later to emit debug info for them. */
7093 }
7095 /* Add this declaration to the statement-tree. This needs to happen
7096 after the call to check_initializer so that the DECL_EXPR for a
7097 reference temp is added before the DECL_EXPR for the reference itself. */
7099 {
7100 /* If we're building a variable sized type, and we might be
7101 reachable other than via the top of the current binding
7102 level, then create a new BIND_EXPR so that we deallocate
7103 the object at the right time. */
7108 {
7109 tree bind;
7114 }
7116 }
7118 /* Let the middle end know about variables and functions -- but not
7119 static data members in uninstantiated class templates. */
7121 {
7123 {
7126 }
7128 /* This needs to happen after the linkage is set. */
7132 {
7133 /* If a TREE_READONLY variable needs initialization
7134 at runtime, it is no longer readonly and we need to
7135 avoid MEM_READONLY_P being set on RTL created for it. */
7137 {
7141 }
7145 /* Likewise if it needs destruction. */
7148 }
7152 /* Check for abstractness of the type. Notice that there is no
7153 need to strip array types here since the check for those types
7154 is already done within create_array_type_for_decl. */
7158 /* No initialization required. */
7159 ;
7161 {
7163 {
7165 {
7166 /* An out-of-class default definition is defined at
7167 the point where it is explicitly defaulted. */
7172 }
7173 else
7175 }
7176 /* else no initialization required. */
7177 }
7181 {
7184 }
7185 /* A variable definition. */
7187 /* Initialize the local variable. */
7190 /* If a variable is defined, and then a subsequent
7191 definition with external linkage is encountered, we will
7192 get here twice for the same variable. We want to avoid
7193 calling expand_static_init more than once. For variables
7194 that are not static data members, we can call
7195 expand_static_init only when we actually process the
7196 initializer. It is not legal to redeclare a static data
7197 member, so this issue does not arise in that case. */
7200 }
7202 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
7203 reference, insert it in the statement-tree now. */
7205 {
7210 }
7216 }
7218 /* For class TYPE return itself or some its bases that contain
7219 any direct non-static data members. Return error_mark_node if an
7220 error has been diagnosed. */
7222 static tree
7224 {
7234 {
7238 else
7243 }
7245 {
7253 }
7254 else
7264 {
7269 {
7271 {
7276 }
7280 {
7282 "classes %qT and %qT have non-static data "
7285 }
7286 else
7288 }
7289 }
7291 }
7293 /* Return std::tuple_size<TYPE>::value. */
7295 static tree
7297 {
7313 else
7315 }
7317 /* Return std::tuple_element<I,TYPE>::type. */
7319 static tree
7321 {
7329 tf_warning_or_error);
7332 }
7334 /* Return e.get<i>() or get<i>(e). */
7336 static tree
7338 {
7346 /* [The id-expression] e is an lvalue if the type of the entity e is an
7347 lvalue reference and an xvalue otherwise. */
7356 /* To use a member get, member lookup must find at least one
7357 declaration that is a function template
7358 whose first template parameter is a non-type parameter. */
7360 {
7363 {
7367 {
7370 }
7371 }
7372 }
7375 {
7380 }
7381 else
7382 {
7388 }
7389 }
7391 /* It's impossible to recover the decltype of a tuple decomposition variable
7392 based on the actual type of the variable, so store it in a hash table. */
7395 static void
7397 {
7401 }
7403 tree
7405 {
7407 }
7409 /* Mangle a decomposition declaration if needed. Arguments like
7410 in cp_finish_decomp. */
7412 void
7414 {
7418 {
7426 }
7427 }
7429 /* Finish a decomposition declaration. DECL is the underlying declaration
7430 "e", FIRST is the head of a chain of decls for the individual identifiers
7431 chained through DECL_CHAIN in reverse order and COUNT is the number of
7432 those decls. */
7434 void
7436 {
7438 {
7439 error_out:
7441 {
7444 {
7447 }
7449 }
7453 }
7457 /* This happens for range for when not in templates.
7458 Still add the DECL_VALUE_EXPRs for later processing. */
7459 || (!processing_template_decl
7461 {
7463 {
7465 {
7471 }
7475 }
7477 }
7483 {
7486 }
7492 {
7498 {
7500 type);
7502 }
7503 }
7508 {
7509 tree nelts;
7514 {
7517 }
7520 {
7521 cnt_mismatch:
7526 else
7535 }
7538 {
7546 NULL_TREE);
7549 }
7550 }
7551 /* 2 GNU extensions. */
7553 {
7559 {
7567 t);
7570 }
7571 }
7573 {
7575 {
7578 }
7583 {
7593 NULL_TREE);
7596 }
7597 }
7599 {
7601 {
7605 }
7607 {
7614 }
7620 {
7631 {
7635 }
7636 /* Save the decltype away before reference collapse. */
7642 {
7643 /* In this case the names are variables, not just proxies. */
7646 }
7650 }
7651 /* Ignore reads from the underlying decl performed during initialization
7652 of the individual variables. If those will be read, we'll mark
7653 the underlying decl as read at that point. */
7655 }
7657 {
7660 }
7662 {
7665 }
7667 {
7670 }
7673 type);
7674 else
7675 {
7680 {
7684 }
7690 else
7691 eltscnt++;
7696 {
7700 }
7707 else
7708 {
7710 NULL_TREE);
7716 {
7719 }
7720 i++;
7721 }
7722 }
7724 {
7727 {
7732 }
7733 }
7734 }
7736 /* Returns a declaration for a VAR_DECL as if:
7738 extern "C" TYPE NAME;
7740 had been seen. Used to create compiler-generated global
7741 variables. */
7743 static tree
7745 {
7746 tree decl;
7754 /* If the user has explicitly declared this variable (perhaps
7755 because the code we are compiling is part of a low-level runtime
7756 library), then it is possible that our declaration will be merged
7757 with theirs by pushdecl. */
7763 }
7765 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
7766 if "__cxa_atexit" is not being used) corresponding to the function
7767 to be called when the program exits. */
7769 static tree
7771 {
7772 tree fn_type;
7775 {
7776 tree arg_type;
7779 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
7781 else
7782 /* The parameter to "atexit" is "void (*)(void)". */
7788 }
7791 }
7793 /* Returns a pointer to the `atexit' function. Note that if
7794 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
7795 `__cxa_atexit' function specified in the IA64 C++ ABI. */
7797 static tree
7799 {
7800 tree atexit_fndecl;
7801 tree fn_type;
7802 tree fn_ptr_type;
7810 {
7811 /* The declaration for `__cxa_atexit' is:
7813 int __cxa_atexit (void (*)(void *), void *, void *)
7815 We build up the argument types and then the function type
7816 itself. */
7820 /* First, build the pointer-to-function type for the first
7821 argument. */
7823 /* Then, build the rest of the argument types. */
7826 {
7829 }
7830 else
7831 {
7834 }
7835 /* And the final __cxa_atexit type. */
7838 NULL_TREE);
7841 else
7843 }
7844 else
7845 {
7846 /* The declaration for `atexit' is:
7848 int atexit (void (*)());
7850 We build up the argument types and then the function type
7851 itself. */
7853 /* Build the final atexit type. */
7857 }
7859 /* Now, build the function declaration. */
7867 }
7869 /* Like get_atexit_node, but for thread-local cleanups. */
7871 static tree
7873 {
7874 /* The declaration for `__cxa_thread_atexit' is:
7876 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7880 NULL_TREE);
7882 /* Now, build the function declaration. */
7886 }
7888 /* Returns the __dso_handle VAR_DECL. */
7890 static tree
7892 {
7896 /* Declare the variable. */
7898 ptr_type_node);
7900 #ifdef HAVE_GAS_HIDDEN
7902 {
7905 }
7906 #endif
7909 }
7911 /* Begin a new function with internal linkage whose job will be simply
7912 to destroy some particular variable. */
7916 static tree
7918 {
7920 tree fntype;
7921 tree fndecl;
7927 /* No need to mangle this. */
7930 /* Build the name of the function. */
7932 /* Build the function declaration. */
7935 /* It's a function with internal linkage, generated by the
7936 compiler. */
7939 /* Make the function `inline' so that it is only emitted if it is
7940 actually needed. It is unlikely that it will be inlined, since
7941 it is only called via a function pointer, but we avoid unnecessary
7942 emissions this way. */
7945 /* Build the parameter. */
7947 {
7952 }
7960 }
7962 /* Finish the cleanup function begun by start_cleanup_fn. */
7964 static void
7966 {
7970 }
7972 /* Generate code to handle the destruction of DECL, an object with
7973 static storage duration. */
7975 tree
7977 {
7978 tree cleanup;
7979 tree addr;
7980 tree compound_stmt;
7981 tree fcall;
7982 tree type;
7985 tree atex_node;
7991 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7992 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7993 destructor to "__cxa_atexit"; we don't have to build a temporary
7994 function to do the cleanup. */
7995 dso_parm = (flag_use_cxa_atexit
8000 {
8003 /* Make sure it is accessible. */
8005 tf_warning_or_error);
8006 }
8007 else
8008 {
8009 /* Call build_cleanup before we enter the anonymous function so
8010 that any access checks will be done relative to the current
8011 scope, rather than the scope of the anonymous function. */
8014 /* Now start the function. */
8017 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
8018 to the original function, rather than the anonymous one. That
8019 will make the back end think that nested functions are in use,
8020 which causes confusion. */
8025 /* Create the body of the anonymous function. */
8030 }
8032 /* Call atexit with the cleanup function. */
8038 else
8042 {
8043 /* We must convert CLEANUP to the type that "__cxa_atexit"
8044 expects. */
8046 /* "__cxa_atexit" will pass the address of DECL to the
8047 cleanup function. */
8050 /* The declared type of the parameter to "__cxa_atexit" is
8051 "void *". For plain "T*", we could just let the
8052 machinery in cp_build_function_call convert it -- but if the
8053 type is "cv-qualified T *", then we need to convert it
8054 before passing it in, to avoid spurious errors. */
8056 }
8057 else
8058 /* Since the cleanup functions we build ignore the address
8059 they're given, there's no reason to pass the actual address
8060 in, and, in general, it's cheaper to pass NULL than any
8061 other value. */
8066 tf_warning_or_error);
8068 /* Just pass NULL to the dso handle parm if we don't actually
8069 have a DSO handle on this target. */
8071 else
8075 {
8078 {
8081 }
8082 else
8083 {
8086 }
8087 }
8088 else
8089 {
8092 }
8095 }
8097 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
8098 is its initializer. Generate code to handle the construction
8099 and destruction of DECL. */
8101 static void
8103 {
8107 /* Some variables require no dynamic initialization. */
8109 {
8110 /* Make sure the destructor is callable. */
8114 }
8118 {
8122 else
8127 {
8129 "C++11 %<thread_local%> allows dynamic initialization "
8132 }
8134 }
8137 {
8138 /* Emit code to perform this initialization but once. */
8143 /* We don't need thread-safety code for thread-local vars. */
8147 /* Emit code to perform this initialization but once. This code
8148 looks like:
8150 static <type> guard;
8151 if (!__atomic_load (guard.first_byte)) {
8152 if (__cxa_guard_acquire (&guard)) {
8153 bool flag = false;
8154 try {
8155 // Do initialization.
8156 flag = true; __cxa_guard_release (&guard);
8157 // Register variable for destruction at end of program.
8158 } catch {
8159 if (!flag) __cxa_guard_abort (&guard);
8160 }
8161 }
8162 }
8164 Note that the `flag' variable is only set to 1 *after* the
8165 initialization is complete. This ensures that an exception,
8166 thrown during the construction, will cause the variable to
8167 reinitialized when we pass through this code again, as per:
8169 [stmt.dcl]
8171 If the initialization exits by throwing an exception, the
8172 initialization is not complete, so it will be tried again
8173 the next time control enters the declaration.
8175 This process should be thread-safe, too; multiple threads
8176 should not be able to initialize the variable more than
8177 once. */
8179 /* Create the guard variable. */
8182 /* Begin the conditional initialization. */
8189 {
8202 acquire_fn = push_library_fn
8205 NULL_TREE),
8210 NULL_TREE);
8220 inner_if_stmt);
8228 void_node,
8232 /* Do the initialization itself. */
8234 init = add_stmt_to_compound
8236 init = add_stmt_to_compound
8238 }
8239 else
8242 /* Use atexit to register a function for destroying this static
8243 variable. */
8249 {
8253 }
8258 }
8261 else
8263 }
8265 \f
8266 /* Make TYPE a complete type based on INITIAL_VALUE.
8267 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8268 2 if there was no information (in which case assume 0 if DO_DEFAULT),
8269 3 if the initializer list is empty (in pedantic mode). */
8271 int
8273 {
8277 /* Don't get confused by a CONSTRUCTOR for some other type. */
8284 {
8286 tree value;
8288 /* An array of character type can be initialized from a
8289 brace-enclosed string constant.
8291 FIXME: this code is duplicated from reshape_init. Probably
8292 we should just call reshape_init here? */
8296 {
8303 }
8305 /* If any of the elements are parameter packs, we can't actually
8306 complete this type now because the array size is dependent. */
8308 {
8311 {
8314 }
8315 }
8316 }
8320 /* We can create the array before the element type is complete, which
8321 means that we didn't have these two bits set in the original type
8322 either. In completing the type, we are expected to propagate these
8323 bits. See also complete_type which does the same thing for arrays
8324 of fixed size. */
8327 {
8332 }
8335 }
8337 /* As above, but either give an error or reject zero-size arrays, depending
8338 on COMPLAIN. */
8340 int
8343 {
8346 /* In SFINAE context we can't be lenient about zero-size arrays. */
8353 {
8359 {
8362 }
8366 }
8368 }
8369 \f
8370 /* Return zero if something is declared to be a member of type
8371 CTYPE when in the context of CUR_TYPE. STRING is the error
8372 message to print in that case. Otherwise, quietly return 1. */
8374 static int
8376 {
8378 {
8381 else
8384 }
8386 }
8387 \f
8388 /* Subroutine of `grokdeclarator'. */
8390 /* Generate errors possibly applicable for a given set of specifiers.
8391 This is for ARM $7.1.2. */
8393 static void
8401 {
8403 {
8440 }
8444 && !flag_noexcept_type
8450 }
8452 /* DECL is a member function or static data member and is presently
8453 being defined. Check that the definition is taking place in a
8454 valid namespace. */
8456 static void
8458 {
8459 /* These checks only apply to member functions and static data
8460 members. */
8462 /* We check for problems with specializations in pt.c in
8463 check_specialization_namespace, where we can issue better
8464 diagnostics. */
8467 /* We check this in check_explicit_instantiation_namespace. */
8470 /* [class.mfct]
8472 A member function definition that appears outside of the
8473 class definition shall appear in a namespace scope enclosing
8474 the class definition.
8476 [class.static.data]
8478 The definition for a static data member shall appear in a
8479 namespace scope enclosing the member's class definition. */
8483 }
8485 /* Build a PARM_DECL for the "this" parameter of FN. TYPE is the
8486 METHOD_TYPE for a non-static member function; QUALS are the
8487 cv-qualifiers that apply to the function. */
8489 tree
8491 {
8492 tree this_type;
8493 tree qual_type;
8494 tree parm;
8495 cp_cv_quals this_quals;
8498 {
8499 this_type
8502 }
8503 else
8505 /* The `this' parameter is implicitly `const'; it cannot be
8506 assigned to. */
8512 }
8514 /* DECL is a static member function. Complain if it was declared
8515 with function-cv-quals. */
8517 static void
8519 {
8522 decl);
8523 }
8525 // Check that FN takes no arguments and returns bool.
8526 static void
8528 {
8529 // A constraint is nullary.
8533 // The declared return type of the concept shall be bool, and
8534 // it shall not be deduced from it definition.
8540 }
8542 /* Helper function. Replace the temporary this parameter injected
8543 during cp_finish_omp_declare_simd with the real this parameter. */
8545 static tree
8547 {
8556 }
8558 /* CTYPE is class type, or null if non-class.
8559 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8560 or METHOD_TYPE.
8561 DECLARATOR is the function's name.
8562 PARMS is a chain of PARM_DECLs for the function.
8563 VIRTUALP is truthvalue of whether the function is virtual or not.
8564 FLAGS are to be passed through to `grokclassfn'.
8565 QUALS are qualifiers indicating whether the function is `const'
8566 or `volatile'.
8567 RAISES is a list of exceptions that this function can raise.
8568 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8569 not look, and -1 if we should not call `grokclassfn' at all.
8571 SFK is the kind of special function (if any) for the new function.
8573 Returns `NULL_TREE' if something goes wrong, after issuing
8574 applicable error messages. */
8576 static tree
8578 tree type,
8579 tree declarator,
8580 tree parms,
8581 tree orig_declarator,
8582 tree decl_reqs,
8585 cp_cv_quals quals,
8586 cp_ref_qualifier rqual,
8587 tree raises,
8593 special_function_kind sfk,
8597 tree in_namespace,
8599 location_t location)
8600 {
8601 tree decl;
8603 tree t;
8605 // Was the concept specifier present?
8608 // Concept declarations must have a corresponding definition.
8610 {
8613 }
8619 /* Set the constraints on the declaration. */
8621 {
8626 /* Adjust the required expression into a constraint. */
8632 }
8634 /* If we have an explicit location, use it, otherwise use whatever
8635 build_lang_decl used (probably input_location). */
8640 {
8645 /* Allocate space to hold the vptr bit if needed. */
8647 }
8653 /* Propagate volatile out from type to decl. */
8657 /* Setup decl according to sfk. */
8659 {
8672 }
8675 {
8678 orig_declarator);
8679 else
8680 {
8685 {
8686 /* Something like `template <class T> friend void f<T>()'. */
8689 orig_declarator);
8691 }
8694 /* A friend declaration of the form friend void f<>(). Record
8695 the information in the TEMPLATE_ID_EXPR. */
8704 {
8707 decl);
8709 }
8712 {
8715 decl);
8717 }
8718 }
8719 }
8721 /* If this decl has namespace scope, set that up. */
8727 /* `main' and builtins have implicit 'C' linkage. */
8742 /* Should probably propagate const out from type to decl I bet (mrs). */
8744 {
8747 }
8753 {
8757 }
8760 {
8771 }
8773 /* Members of anonymous types and local classes have no linkage; make
8774 them internal. If a typedef is made later, this will be changed. */
8780 {
8781 /* [basic.link]: A name with no linkage (notably, the name of a class
8782 or enumeration declared in a local scope) shall not be used to
8783 declare an entity with linkage.
8785 DR 757 relaxes this restriction for C++0x. */
8787 }
8791 {
8794 }
8796 /* If the declaration was declared inline, mark it as such. */
8798 {
8802 }
8806 // If the concept declaration specifier was found, check
8807 // that the declaration satisfies the necessary requirements.
8809 {
8812 }
8816 {
8819 TYPE_UNQUALIFIED,
8820 REF_QUAL_NONE);
8823 {
8827 decl);
8829 }
8832 {
8836 decl);
8838 }
8839 }
8842 {
8844 {
8848 }
8852 }
8857 {
8861 /* [over.literal]/6: Literal operators shall not have C linkage. */
8863 {
8867 }
8870 {
8873 {
8876 }
8880 {
8884 }
8886 {
8890 }
8891 /* 17.6.3.3.5 */
8896 "literal operator suffixes not preceded by %<_%>"
8898 }
8899 else
8900 {
8903 }
8904 }
8907 /* Make the init_value nonzero so pushdecl knows this is not
8908 tentative. error_mark_node is replaced later with the BLOCK. */
8915 {
8916 /* Adjust "omp declare simd" attributes. */
8919 {
8920 tree attr;
8923 {
8928 {
8930 cl = c_omp_declare_simd_clauses_to_numbers
8934 else
8936 }
8937 }
8938 }
8939 }
8941 /* Caller will do the rest of this. */
8948 /* 12.4/3 */
8956 template_count,
8968 {
8971 }
8973 /* Check main's type after attributes have been applied. */
8975 {
8977 integer_type_node))
8978 {
8980 tree newtype;
8984 }
8987 }
8990 {
8992 (processing_template_decl
8994 ? current_template_parms
9001 {
9002 tree ok;
9003 tree pushed_scope;
9006 /* Because grokfndecl is always supposed to return a
9007 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
9008 here. We depend on our callers to figure out that its
9009 really a template that's being returned. */
9014 {
9015 /* Remove the `this' parm added by grokclassfn. */
9018 }
9020 {
9023 }
9025 {
9030 }
9032 /* Since we've smashed OLD_DECL to its
9033 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
9037 /* Attempt to merge the declarations. This can fail, in
9038 the case of some invalid specialization declarations. */
9044 {
9048 }
9052 }
9053 }
9065 }
9067 /* decl is a FUNCTION_DECL.
9068 specifiers are the parsed virt-specifiers.
9070 Set flags to reflect the virt-specifiers.
9072 Returns decl. */
9074 static tree
9076 {
9084 }
9086 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
9087 the linkage that DECL will receive in the object file. */
9089 static void
9091 {
9092 /* A static data member always has static storage duration and
9093 external linkage. Note that static data members are forbidden in
9094 local classes -- the only situation in which a class has
9095 non-external linkage. */
9098 /* For non-template classes, static data members are always put
9099 out in exactly those files where they are defined, just as
9100 with ordinary namespace-scope variables. */
9103 }
9105 /* Create a VAR_DECL named NAME with the indicated TYPE.
9107 If SCOPE is non-NULL, it is the class type or namespace containing
9108 the variable. If SCOPE is NULL, the variable should is created in
9109 the innermost enclosing scope. */
9111 static tree
9113 tree name,
9114 tree orig_declarator,
9121 tree scope)
9122 {
9123 tree decl;
9124 tree explicit_scope;
9131 /* Compute the scope in which to place the variable, but remember
9132 whether or not that scope was explicitly specified by the user. */
9135 {
9136 /* An explicit "extern" specifier indicates a namespace-scope
9137 variable. */
9142 }
9146 template, we need DECL_LANG_SPECIFIC. */
9148 /* Similarly for namespace-scope variables with language linkage
9149 other than C++. */
9152 /* Similarly for static data members. */
9154 /* Similarly for explicit specializations. */
9155 || (orig_declarator
9158 else
9163 else
9167 {
9170 }
9173 {
9175 /* This function is only called with out-of-class definitions. */
9178 }
9179 /* At top level, either `static' or no s.c. makes a definition
9180 (perhaps tentative), and absence of `static' makes it public. */
9182 {
9185 || ! constp
9186 || volatilep
9189 }
9190 /* Not at top level, only `static' makes a static definition. */
9191 else
9192 {
9195 }
9198 {
9200 {
9204 }
9207 }
9209 /* If the type of the decl has no linkage, make sure that we'll
9210 notice that in mark_used. */
9219 {
9220 /* [basic.link]: A name with no linkage (notably, the name of a class
9221 or enumeration declared in a local scope) shall not be used to
9222 declare an entity with linkage.
9224 DR 757 relaxes this restriction for C++0x. */
9227 }
9228 else
9236 /* Check that the variable can be safely declared as a concept.
9237 Note that this also forbids explicit specializations. */
9239 {
9241 {
9244 }
9245 else
9250 }
9253 {
9257 }
9259 // Handle explicit specializations and instantiations of variable templates.
9265 }
9267 /* Create and return a canonical pointer to member function type, for
9268 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
9270 tree
9272 {
9274 tree t;
9279 /* Make sure that we always have the unqualified pointer-to-member
9280 type first. */
9282 {
9285 }
9287 /* If a canonical type already exists for this type, use it. We use
9288 this method instead of type_hash_canon, because it only does a
9289 simple equality check on the list of field members. */
9297 /* Let the front end know this is a pointer to member function. */
9304 delta_type_node);
9310 /* Zap out the name so that the back end will give us the debugging
9311 information for this anonymous RECORD_TYPE. */
9314 /* Cache this pointer-to-member type so that we can find it again
9315 later. */
9324 }
9326 /* Create and return a pointer to data member type. */
9328 tree
9330 {
9332 {
9337 }
9338 else
9339 {
9342 }
9343 }
9345 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
9346 Check to see that the definition is valid. Issue appropriate error
9347 messages. Return 1 if the definition is particularly bad, or 0
9348 otherwise. */
9350 static int
9352 {
9353 /* Avoid redundant diagnostics on out-of-class definitions. */
9356 /* Can't check yet if we don't know the type. */
9359 /* If DECL is declared constexpr, we'll do the appropriate checks
9360 in check_initializer. Similarly for inline static data members. */
9367 {
9370 "in-class initialization of static data member %q#D of "
9374 "%<constexpr%> needed for in-class initialization of "
9376 else
9378 "in-class initialization of static data member %q#D of "
9381 }
9383 /* Motion 10 at San Diego: If a static const integral data member is
9384 initialized with an integral constant expression, the initializer
9385 may appear either in the declaration (within the class), or in
9386 the definition, but not both. If it appears in the class, the
9387 member is a member constant. The file-scope definition is always
9388 required. */
9390 {
9392 "invalid in-class initialization of static data member "
9394 type);
9396 }
9399 "ISO C++ forbids in-class initialization of non-const "
9401 decl);
9404 "ISO C++ forbids initialization of member constant "
9408 }
9410 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
9411 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
9412 expressions out into temporary variables so that walk_tree doesn't
9413 step into them (c++/15764). */
9415 static tree
9417 {
9421 {
9427 }
9431 }
9433 /* Entry point for the above. */
9435 static void
9437 {
9439 /* Break out any function calls into temporary variables. */
9441 }
9443 /* Reduce a SIZEOF_EXPR to its value. */
9445 tree
9447 {
9448 tree r;
9455 else
9461 }
9463 /* Given the SIZE (i.e., number of elements) in an array, compute
9464 an appropriate index type for the array. If non-NULL, NAME is
9465 the name of the entity being declared. */
9467 tree
9469 {
9470 tree itype;
9477 {
9482 /* In C++98, we mark a non-constant array bound with a magic
9484 else
9485 {
9492 }
9497 /* The array bound must be an integer type. */
9500 {
9505 else
9508 }
9509 }
9511 /* A type is dependent if it is...an array type constructed from any
9512 dependent type or whose size is specified by a constant expression
9513 that is value-dependent. */
9514 /* We can only call value_dependent_expression_p on integral constant
9515 expressions; treat non-constant expressions as dependent, too. */
9519 {
9520 /* We cannot do any checking for a SIZE that isn't known to be
9521 constant. Just build the index type and mark that it requires
9522 structural equality checks. */
9529 }
9532 {
9537 /* Use the folded result for VLAs, too; it will have resolved
9538 SIZEOF_EXPR. */
9540 }
9542 /* Normally, the array-bound will be a constant. */
9544 {
9545 /* An array must have a positive number of elements. */
9547 {
9553 else
9556 }
9557 /* As an extension we allow zero-sized arrays. */
9559 {
9561 /* We must fail if performing argument deduction (as
9562 indicated by the state of complain), so that
9563 another substitution can be found. */
9569 else
9571 }
9572 }
9574 /* We don't allow VLAs at non-function scopes, or during
9575 tentative template substitution. */
9578 {
9581 /* `(int) &fn' is not a valid array bound. */
9584 name);
9585 else
9588 }
9590 {
9593 else
9595 }
9597 {
9601 else
9604 }
9607 /* A variable sized array. */
9609 else
9610 {
9611 /* Compute the index of the largest element in the array. It is
9612 one less than the number of elements in the array. We save
9613 and restore PROCESSING_TEMPLATE_DECL so that computations in
9614 cp_build_binary_op will be appropriately folded. */
9615 {
9616 processing_template_decl_sentinel s;
9618 MINUS_EXPR,
9621 complain),
9622 complain);
9624 }
9627 {
9628 /* A variable sized array. */
9635 {
9636 /* We have to add 1 -- in the ubsan routine we generate
9637 LE_EXPR rather than LT_EXPR. */
9642 }
9643 }
9644 /* Make sure that there was no overflow when creating to a signed
9645 index type. (For example, on a 32-bit machine, an array with
9646 size 2^32 - 1 is too big.) */
9649 {
9654 }
9655 }
9657 /* Create and return the appropriate index type. */
9660 /* If the index type were dependent, we would have returned early, so
9661 remember that it isn't. */
9665 }
9667 /* Returns the scope (if any) in which the entity declared by
9668 DECLARATOR will be located. If the entity was declared with an
9669 unqualified name, NULL_TREE is returned. */
9671 tree
9673 {
9677 /* If the declarator-id is a SCOPE_REF, the scope in which the
9678 declaration occurs is the first operand. */
9683 /* Otherwise, the declarator is not a qualified name; the entity will
9684 be declared in the current scope. */
9686 }
9688 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
9689 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
9690 with this type. */
9692 static tree
9694 {
9697 /* If things have already gone awry, bail now. */
9701 /* 8.3.4/1: If the type of the identifier of D contains the auto
9702 type-specifier, the program is ill-formed. */
9704 {
9707 }
9709 /* If there are some types which cannot be array elements,
9710 issue an error-message and return. */
9712 {
9716 else
9723 else
9730 else
9737 else
9743 }
9745 /* [dcl.array]
9747 The constant expressions that specify the bounds of the arrays
9748 can be omitted only for the first member of the sequence. */
9750 {
9754 name);
9755 else
9760 }
9762 /* Figure out the index type for the array. */
9766 /* [dcl.array]
9767 T is called the array element type; this type shall not be [...] an
9768 abstract class type. */
9772 }
9774 /* Returns the smallest location != UNKNOWN_LOCATION among the
9775 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
9776 and LOCATIONS[ds_restrict]. */
9778 static location_t
9780 {
9795 }
9797 /* Check that it's OK to declare a function with the indicated TYPE
9798 and TYPE_QUALS. SFK indicates the kind of special function (if any)
9799 that this function is. OPTYPE is the type given in a conversion
9800 operator declaration, or the class type for a constructor/destructor.
9801 Returns the actual return type of the function; that may be different
9802 than TYPE if an error occurs, or for certain special functions. */
9804 static tree
9806 tree type,
9807 tree optype,
9810 {
9812 {
9822 else
9833 /* We can't use the proper return type here because we run into
9834 problems with ambiguous bases and covariant returns. */
9837 else
9846 "qualifiers are not allowed on declaration of "
9857 "qualifiers are not allowed on declaration of "
9860 {
9864 }
9865 else
9875 }
9878 }
9880 /* A variable or data member (whose unqualified name is IDENTIFIER)
9881 has been declared with the indicated TYPE. If the TYPE is not
9882 acceptable, issue an error message and return a type to use for
9883 error-recovery purposes. */
9885 tree
9887 {
9889 {
9893 {
9896 }
9897 else
9900 }
9903 }
9905 /* Handle declaring DECL as an inline variable. */
9907 static void
9909 {
9912 {
9916 }
9919 "inline variables are only available "
9922 {
9925 }
9926 }
9929 /* Assign a typedef-given name to a class or enumeration type declared
9930 as anonymous at first. This was split out of grokdeclarator
9931 because it is also used in libcc1. */
9933 void
9935 {
9938 /* Replace the anonymous name with the real name everywhere. */
9940 {
9942 /* We do not rename the debug info representing the
9943 unnamed tagged type because the standard says in
9944 [dcl.typedef] that the naming applies only for
9945 linkage purposes. */
9946 /*debug_hooks->set_name (t, decl);*/
9948 }
9953 /* If this is a typedef within a template class, the nested
9954 type is a (non-primary) template. The name for the
9955 template needs updating as well. */
9960 /* Adjust linkage now that we aren't unnamed anymore. */
9963 /* FIXME remangle member functions; member functions of a
9964 type with external linkage have external linkage. */
9966 /* Check that our job is done, and that it would fail if we
9967 attempted to do it again. */
9969 }
9971 /* Given declspecs and a declarator (abstract or otherwise), determine
9972 the name and type of the object declared and construct a DECL node
9973 for it.
9975 DECLSPECS points to the representation of declaration-specifier
9976 sequence that precedes declarator.
9978 DECL_CONTEXT says which syntactic context this declaration is in:
9979 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9980 FUNCDEF for a function definition. Like NORMAL but a few different
9981 error messages in each case. Return value may be zero meaning
9982 this definition is too screwy to try to parse.
9983 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9984 handle member functions (which have FIELD context).
9985 Return value may be zero meaning this definition is too screwy to
9986 try to parse.
9987 PARM for a parameter declaration (either within a function prototype
9988 or before a function body). Make a PARM_DECL, or return void_type_node.
9989 TPARM for a template parameter declaration.
9990 CATCHPARM for a parameter declaration before a catch clause.
9991 TYPENAME if for a typename (in a cast or sizeof).
9992 Don't make a DECL node; just return the ..._TYPE node.
9993 FIELD for a struct or union field; make a FIELD_DECL.
9994 BITFIELD for a field with specified width.
9996 INITIALIZED is as for start_decl.
9998 ATTRLIST is a pointer to the list of attributes, which may be NULL
9999 if there are none; *ATTRLIST may be modified if attributes from inside
10000 the declarator should be applied to the declaration.
10002 When this function is called, scoping variables (such as
10003 CURRENT_CLASS_TYPE) should reflect the scope in which the
10004 declaration occurs, not the scope in which the new declaration will
10005 be placed. For example, on:
10007 void S::f() { ... }
10009 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
10010 should not be `S'.
10012 Returns a DECL (if a declarator is present), a TYPE (if there is no
10013 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
10014 error occurs. */
10016 tree
10022 {
10034 /* True if this declarator is a function definition. */
10038 #if 0
10039 /* See the code below that used this. */
10041 #endif
10043 /* Keep track of what sort of function is being processed
10044 so that we can warn about default return values, or explicit
10045 return values which do not match prescribed defaults. */
10051 /* cv-qualifiers that apply to the declarator, for a declaration of
10052 a member function. */
10054 /* virt-specifiers that apply to the declarator, for a declaration of
10055 a member function. */
10057 /* ref-qualifier that applies to the declarator, for a declaration of
10058 a member function. */
10060 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
10067 /* The unqualified name of the declarator; either an
10068 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
10069 tree unqualified_id;
10070 /* The class type, if any, in which this entity is located,
10071 or NULL_TREE if none. Note that this value may be different from
10072 the current class type; for example if an attempt is made to declare
10073 "A::f" inside "B", this value will be "A". */
10075 /* The NAMESPACE_DECL for the namespace in which this entity is
10076 located. If an unqualified name is used to declare the entity,
10077 this value will be NULL_TREE, even if the entity is located at
10078 namespace scope. */
10080 cp_storage_class storage_class;
10101 // Was concept_p specified? Note that ds_concept
10102 // implies ds_constexpr!
10135 /* Look inside a declarator for the name being declared
10136 and get it as a string, for an error message. */
10138 id_declarator;
10140 {
10145 {
10149 {
10153 }
10157 {
10163 {
10165 {
10166 /* [dcl.meaning]
10168 A declarator-id shall not be qualified except
10169 for ...
10171 None of the cases are permitted in block
10172 scope. */
10175 decl);
10179 else
10183 }
10185 {
10188 {
10191 }
10193 && current_class_type
10195 current_class_type))
10196 {
10200 }
10201 }
10204 }
10206 {
10208 {
10210 {
10213 }
10216 {
10219 }
10226 }
10230 {
10236 }
10237 /* Fall through. */
10244 {
10246 dname);
10248 }
10251 else
10252 {
10259 else
10261 }
10266 }
10268 }
10285 }
10288 }
10290 /* [dcl.fct.edf]
10292 The declarator in a function-definition shall have the form
10293 D1 ( parameter-declaration-clause) ... */
10295 {
10298 }
10303 {
10306 }
10309 {
10312 {
10315 }
10318 {
10320 {
10323 }
10325 {
10328 }
10329 }
10330 }
10332 /* Anything declared one level down from the top level
10333 must be one of the parameters of a function
10334 (because the body is at least two levels down). */
10336 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
10337 by not allowing C++ class definitions to specify their parameters
10338 with xdecls (must be spec.d in the parmlist).
10340 Since we now wait to push a class scope until we are sure that
10341 we are in a legitimate method context, we must set oldcname
10342 explicitly (since current_class_name is not yet alive).
10344 We also want to avoid calling this a PARM if it is in a namespace. */
10347 {
10353 }
10359 {
10362 }
10365 {
10368 }
10370 /* If there were multiple types specified in the decl-specifier-seq,
10371 issue an error message. */
10373 {
10376 }
10379 {
10382 }
10384 /* Extract the basic type from the decl-specifier-seq. */
10387 {
10390 }
10391 /* If the entire declaration is itself tagged as deprecated then
10392 suppress reports of deprecated items. */
10397 {
10404 }
10405 /* No type at all: default to `int', and set DEFAULTED_INT
10406 because it was not a user-defined typedef. */
10408 {
10410 {
10411 /* These imply 'int'. */
10414 }
10415 /* If we just have "complex", it is equivalent to "complex double". */
10418 {
10421 "ISO C++ does not support plain %<complex%> meaning "
10423 }
10424 }
10425 /* Gather flags. */
10429 #if 0
10430 /* See the code below that used this. */
10433 #endif
10438 else
10442 {
10444 ctor_return_type,
10445 type_quals,
10448 }
10450 {
10455 /* We handle `main' specially here, because 'main () { }' is so
10456 common. With no options, it is allowed. With -Wreturn-type,
10457 it is a warning. It is only an error with -pedantic-errors. */
10458 is_main = (funcdef_flag
10474 else
10479 /* FIXME we should be able to propagate the error_mark_node as is
10480 for other contexts too. */
10482 else
10484 }
10489 {
10491 {
10495 }
10500 }
10502 /* Now process the modifiers that were specified
10503 and check for invalid combinations. */
10505 /* Long double is a special combination. */
10507 {
10511 }
10513 /* Check all other uses of type modifiers. */
10516 {
10517 location_t loc;
10520 {
10523 }
10525 {
10528 }
10530 {
10533 }
10535 {
10538 }
10540 {
10543 }
10558 {
10560 {
10564 }
10567 else
10569 }
10570 else
10573 /* Discard the type modifiers if they are invalid. */
10575 {
10581 }
10582 }
10584 /* Decide whether an integer type is signed or not.
10585 Optionally treat bitfields as signed by default. */
10587 /* [class.bit]
10589 It is implementation-defined whether a plain (neither
10590 explicitly signed or unsigned) char, short, int, or long
10591 bit-field is signed or unsigned.
10593 Naturally, we extend this to long long as well. Note that
10594 this does not include wchar_t. */
10596 && !signed_p
10597 /* A typedef for plain `int' without `signed' can be
10598 controlled just like plain `int', but a typedef for
10599 `signed int' cannot be so controlled. */
10600 && !(typedef_decl
10604 {
10617 else
10619 }
10632 {
10635 /* If a modifier is specified, the resulting complex is the complex
10636 form of TYPE. E.g, "complex short" is "complex short int". */
10645 else
10647 }
10649 /* If we're using the injected-class-name to form a compound type or a
10650 declaration, replace it with the underlying class so we don't get
10651 redundant typedefs in the debug output. But if we are returning the
10652 type unchanged, leave it alone so that it's available to
10653 maybe_get_template_decl_from_type_decl. */
10661 type = cp_build_qualified_type_real
10665 /* We might have ignored or rejected some of the qualifiers. */
10672 {
10676 }
10688 {
10690 {
10695 }
10699 }
10702 /* Issue errors about use of storage classes for parameters. */
10704 {
10706 {
10709 }
10711 {
10714 }
10720 /* Function parameters cannot be concept. */
10723 /* Function parameters cannot be constexpr. If we saw one, moan
10724 and pretend it wasn't there. */
10726 {
10729 }
10730 }
10732 /* Give error if `virtual' is used outside of class declaration. */
10735 {
10739 }
10742 {
10757 declspecs->gnu_thread_keyword_p
10763 {
10788 }
10791 {
10793 {
10797 "type must be cv-qualified %<auto%> or reference to "
10799 }
10802 }
10812 }
10814 /* Static anonymous unions are dealt with here. */
10820 /* Warn about storage classes that are invalid for certain
10821 kinds of declarations (parameters, typenames, etc.). */
10823 && ((storage_class
10827 {
10830 }
10835 {
10839 ;
10841 ;
10843 /* C++ allows static class elements. */
10845 /* C++ also allows inlines and signed and unsigned elements,
10846 but in those cases we don't come in here. */
10847 ;
10848 else
10849 {
10852 else
10853 {
10856 else
10858 }
10864 }
10865 }
10870 {
10873 }
10877 {
10882 /* When thread_local is applied to a variable of block scope the
10883 storage-class-specifier static is implied if it does not appear
10884 explicitly. */
10887 }
10890 {
10894 }
10898 else
10899 {
10902 {
10915 }
10916 }
10919 {
10924 }
10926 /* Determine the type of the entity declared by recurring on the
10927 declarator. */
10929 {
10931 tree attrs;
10938 {
10950 attr_flags);
10951 }
10955 /* We don't want to warn in parameter context because we don't
10956 yet know if the parse will succeed, and this might turn out
10957 to be a constructor call. */
10960 && !typedef_p
10962 /* If the type is class-like and the inner name used a
10963 global namespace qualifier, we need the parens.
10964 Unfortunately all we can tell is whether a qualified name
10965 was used or not. */
10966 && !(inner_declarator
10977 {
10985 /* [dcl.array]/1:
10987 The optional attribute-specifier-seq appertains to the
10988 array. */
10994 {
10995 tree arg_types;
10998 /* Declaring a function type. */
11004 /* Pick up type qualifiers which should be applied to `this'. */
11006 /* Pick up virt-specifiers. */
11008 /* And ref-qualifier, too */
11010 /* And tx-qualifier. */
11012 /* Pick up the exception specifications. */
11014 /* If the exception-specification is ill-formed, let's pretend
11015 there wasn't one. */
11023 /* Say it's a definition only for the CALL_EXPR
11024 closest to the identifier. */
11027 /* Handle a late-specified return type. */
11030 {
11032 {
11034 {
11039 {
11041 "%<auto%> type specifier without trailing "
11044 "only available with -std=c++14 or "
11046 }
11048 {
11052 }
11053 }
11055 {
11060 }
11066 {
11068 {
11075 }
11077 {
11079 "for %qT must have trailing return "
11084 }
11090 else
11094 }
11095 }
11098 {
11100 /* Not using maybe_warn_cpp0x because this should
11101 always be an error. */
11104 else
11108 }
11109 }
11115 {
11118 }
11121 {
11125 /* We now know that the TYPE_QUALS don't apply to the
11126 decl, but to its return type. */
11128 }
11130 /* Error about some types functions can't return. */
11133 {
11137 }
11139 {
11143 }
11147 && funcdecl_p
11153 {
11154 /* We are within a class's scope. If our declarator name
11155 is the same as the class name, and we are defining
11156 a function, then it is a constructor/destructor, and
11157 therefore returns a void type. */
11159 /* ISO C++ 12.4/2. A destructor may not be declared
11160 const or volatile. A destructor may not be static.
11161 A destructor may not be declared with ref-qualifier.
11163 ISO C++ 12.1. A constructor may not be declared
11164 const or volatile. A constructor may not be
11165 virtual. A constructor may not be static.
11166 A constructor may not be declared with ref-qualifier. */
11172 {
11177 }
11180 {
11186 }
11190 current_class_type,
11191 flags))
11195 {
11196 /* It's a constructor. */
11200 {
11204 }
11208 }
11211 }
11213 {
11215 {
11216 /* Cannot be both friend and virtual. */
11219 }
11223 {
11227 }
11228 }
11230 {
11232 {
11235 }
11238 }
11240 {
11243 }
11250 pushed_scope
11262 {
11266 }
11272 {
11274 /* transaction_safe applies to the type, but
11275 transaction_safe_dynamic applies to the function. */
11278 else
11280 }
11282 /* [dcl.fct]/2:
11284 The optional attribute-specifier-seq appertains to
11285 the function type. */
11290 }
11296 /* Filter out pointers-to-references and references-to-references.
11297 We can get these if a TYPE_DECL is used. */
11300 {
11302 {
11305 }
11307 /* In C++0x, we allow reference to reference declarations
11308 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
11309 and template type arguments [14.3.1/4 temp.arg.type]. The
11310 check for direct reference to reference declarations, which
11311 are still forbidden, occurs below. Reasoning behind the change
11312 can be found in DR106, DR540, and the rvalue reference
11313 proposals. */
11315 {
11318 }
11319 }
11321 {
11326 }
11328 /* We now know that the TYPE_QUALS don't apply to the decl,
11329 but to the target of the pointer. */
11332 /* This code used to handle METHOD_TYPE, but I don't think it's
11333 possible to get it here anymore. */
11337 {
11341 memfn_quals,
11342 rqual);
11348 }
11356 type);
11358 /* When the pointed-to type involves components of variable size,
11359 care must be taken to ensure that the size evaluation code is
11360 emitted early enough to dominate all the possible later uses
11361 and late enough for the variables on which it depends to have
11362 been assigned.
11364 This is expected to happen automatically when the pointed-to
11365 type has a name/declaration of it's own, but special attention
11366 is required if the type is anonymous.
11368 We handle the NORMAL and FIELD contexts here by inserting a
11369 dummy statement that just evaluates the size at a safe point
11370 and ensures it is not deferred until e.g. within a deeper
11371 conditional context (c++/43555).
11373 We expect nothing to be needed here for PARM or TYPENAME.
11374 Evaluating the size at this point for TYPENAME would
11375 actually be incorrect, as we might be in the middle of an
11376 expression with side effects on the pointed-to type size
11377 "arguments" prior to the pointer declaration point and the
11378 size evaluation could end up prior to the side effects. */
11384 {
11388 }
11391 {
11392 /* In C++0x, the type we are creating a reference to might be
11393 a typedef which is itself a reference type. In that case,
11394 we follow the reference collapsing rules in
11395 [7.1.3/8 dcl.typedef] to create the final reference type:
11397 "If a typedef TD names a type that is a reference to a type
11398 T, an attempt to create the type 'lvalue reference to cv TD'
11399 creates the type 'lvalue reference to T,' while an attempt
11400 to create the type "rvalue reference to cv TD' creates the
11401 type TD."
11402 */
11406 {
11409 else
11411 }
11412 else
11413 type = cp_build_reference_type
11416 /* In C++0x, we need this check for direct reference to
11417 reference declarations, which are forbidden by
11418 [8.3.2/5 dcl.ref]. Reference to reference declarations
11419 are only allowed indirectly through typedefs and template
11420 type arguments. Example:
11422 void foo(int & &); // invalid ref-to-ref decl
11424 typedef int & int_ref;
11425 void foo(int_ref &); // valid ref-to-ref decl
11426 */
11430 }
11434 {
11438 /* We will already have complained. */
11440 else
11442 type);
11443 }
11444 else
11447 /* Process a list of type modifier keywords (such as
11448 const or volatile) that were given inside the `*' or `&'. */
11451 {
11452 type
11456 }
11458 /* Apply C++11 attributes to the pointer, and not to the
11459 type pointed to. This is unlike what is done for GNU
11460 attributes above. It is to comply with [dcl.ptr]/1:
11462 [the optional attribute-specifier-seq (7.6.1) appertains
11463 to the pointer and not to the object pointed to]. */
11476 }
11477 }
11479 /* A `constexpr' specifier used in an object declaration declares
11480 the object as `const'. */
11482 {
11483 /* DR1688 says that a `constexpr' specifier in combination with
11484 `volatile' is valid. */
11487 {
11490 }
11491 }
11497 {
11499 unqualified_id);
11501 }
11503 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
11504 qualified with a class-name, turn it into a METHOD_TYPE, unless
11505 we know that the function is static. We take advantage of this
11506 opportunity to do other processing that pertains to entities
11507 explicitly declared to be class members. Note that if DECLARATOR
11508 is non-NULL, we know it is a cdk_id declarator; otherwise, we
11509 would not have exited the loop above. */
11514 {
11520 {
11522 {
11526 }
11527 else
11531 }
11533 can skip the following checks. */
11536 qualifying type must certainly be complete. */
11537 funcdef_flag
11538 /* A friend declaration of "T::f" is OK, even if
11539 "T" is a template parameter. But, if this
11540 function is not a friend, the qualifying type
11541 must be a class. */
11543 /* For a declaration, the type need not be
11544 complete, if either it is dependent (since there
11545 is no meaningful definition of complete in that
11546 case) or the qualifying class is currently being
11547 defined. */
11550 /* Check that the qualifying type is complete. */
11554 {
11557 {
11565 }
11566 }
11568 {
11572 }
11573 }
11578 /* Now TYPE has the actual type. */
11581 {
11584 else
11586 }
11592 {
11593 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
11594 a declarator-id appertains to the entity that is declared. */
11597 else
11598 /* We should have already diagnosed the issue (c++/78344). */
11600 }
11602 /* Handle parameter packs. */
11604 {
11606 /* Turn the type into a pack expansion.*/
11608 else
11610 }
11613 && !processing_template_decl
11615 {
11618 else
11621 }
11624 {
11625 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
11626 in the declaration of a constructor or conversion function within
11627 a class definition. */
11634 else
11636 "only declarations of constructors and conversion operators "
11639 }
11642 {
11644 {
11647 }
11649 {
11652 }
11655 {
11658 }
11660 {
11663 }
11665 {
11668 }
11670 {
11674 }
11675 }
11677 /* If this is declaring a typedef name, return a TYPE_DECL. */
11679 {
11680 tree decl;
11682 /* This declaration:
11684 typedef void f(int) const;
11686 declares a function type which is not a member of any
11687 particular class, but which is cv-qualified; for
11688 example "f S::*" declares a pointer to a const-qualified
11689 member function of S. We record the cv-qualification in the
11690 function type. */
11692 {
11695 /* We have now dealt with these qualifiers. */
11698 }
11701 {
11704 }
11710 {
11713 }
11717 else
11721 {
11725 /* The TYPE_DECL is "abstract" because there will be
11726 clones of this constructor/destructor, and there will
11727 be copies of this TYPE_DECL generated in those
11728 clones. The decloning optimization (for space) may
11729 revert this subsequently if it determines that
11730 the clones should share a common implementation. */
11732 }
11737 unqualified_id);
11739 /* If the user declares "typedef struct {...} foo" then the
11740 struct will have an anonymous name. Fill that name in now.
11741 Nothing can refer to it, so nothing needs know about the name
11742 change. */
11744 && unqualified_id
11762 /* Acknowledge that this was written:
11763 `using analias = atype;'. */
11767 }
11769 /* Detect the case of an array type of unspecified size
11770 which came, as such, direct from a typedef name.
11771 We must copy the type, so that the array's domain can be
11772 individually set by the object's initializer. */
11779 /* Detect where we're using a typedef of function type to declare a
11780 function. PARMS will not be set, so we must create it now. */
11783 {
11785 tree args;
11790 {
11796 }
11801 {
11802 /* The qualifiers on the function type become the qualifiers on
11803 the non-static member function. */
11807 }
11808 }
11810 /* If this is a type name (such as, in a cast or sizeof),
11811 compute the type and return it now. */
11814 {
11815 /* Note that here we don't care about type_quals. */
11817 /* Special case: "friend class foo" looks like a TYPENAME context. */
11819 {
11821 {
11824 }
11827 {
11828 /* Don't allow friend declaration without a class-key. */
11835 else
11838 type);
11839 }
11841 /* Only try to do this stuff if we didn't already give up. */
11843 {
11844 /* A friendly class? */
11848 else
11850 type);
11853 }
11854 }
11856 {
11863 /* Core issue #547: need to allow this in template type args.
11864 Allow it in general in C++11 for alias-declarations. */
11868 else
11870 }
11876 }
11880 && ! bitfield
11882 {
11885 }
11888 {
11889 /* Only functions may be declared using an operator-function-id. */
11891 {
11894 }
11899 type);
11900 }
11902 /* We don't check parameter types here because we can emit a better
11903 error message later. */
11905 {
11909 }
11911 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
11912 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
11915 {
11921 {
11924 else
11927 }
11929 /* A parameter declared as an array of T is really a pointer to T.
11930 One declared as a function is really a pointer to a function.
11931 One declared as a member is really a pointer to member. */
11934 {
11935 /* Transfer const-ness of array into that of type pointed to. */
11939 }
11942 }
11947 {
11953 }
11955 {
11959 {
11966 }
11968 {
11971 {
11977 else
11981 }
11983 /* The C99 flexible array extension. */
11986 {
11990 {
11993 }
11994 else
11995 {
11996 /* Array is a flexible member. */
11998 /* Do not warn on flexible array members in system
12003 else
12007 /* Flexible array member has a null domain. */
12009 }
12010 }
12013 {
12014 /* Happens when declaring arrays of sizes which
12015 are error_mark_node, for example. */
12017 }
12019 {
12020 /* Something like struct S { int N::j; }; */
12023 }
12026 {
12028 tree function_context;
12031 {
12032 /* This should never happen in pure C++ (the check
12033 could be an assert). It could happen in
12034 Objective-C++ if someone writes invalid code that
12035 uses a function declaration for an instance
12036 variable or property (instance variables and
12037 properties are parsed as FIELD_DECLs, but they are
12038 part of an Objective-C class, not a C++ class).
12039 That code is invalid and is caught by this
12040 check. */
12042 {
12044 unqualified_id);
12046 }
12048 /* ``A union may [ ... ] not [ have ] virtual functions.''
12049 ARM 9.5 */
12051 {
12053 unqualified_id);
12055 }
12060 {
12064 }
12065 }
12067 /* Check that the name used for a destructor makes sense. */
12069 {
12073 {
12078 }
12081 {
12085 }
12087 {
12090 }
12092 {
12095 }
12096 }
12098 {
12103 }
12106 {
12109 }
12111 {
12114 }
12117 {
12120 {
12126 }
12127 }
12129 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
12138 parms,
12139 unqualified_id,
12140 reqs,
12151 #if 0
12152 /* This clobbers the attrs stored in `decl' from `attrlist'. */
12153 /* The decl and setting of decl_attr is also turned off. */
12155 #endif
12157 /* [class.conv.ctor]
12159 A constructor declared without the function-specifier
12160 explicit that can be called with a single parameter
12161 specifies a conversion from the type of its first
12162 parameter to the type of its class. Such a constructor
12163 is called a converting constructor. */
12166 }
12171 {
12174 {
12176 {
12180 }
12181 else
12186 }
12187 }
12188 else
12189 {
12191 {
12195 }
12197 }
12200 {
12201 /* Friends are treated specially. */
12205 {
12207 {
12208 decl = check_explicit_specialization
12213 }
12217 funcdef_flag);
12219 }
12220 else
12222 }
12224 /* Structure field. It may not be a function, except for C++. */
12227 {
12229 {
12230 /* C++ allows static class members. All other work
12231 for this is done by grokfield. */
12239 unqualified_id);
12241 {
12245 }
12252 /* Even if there is an in-class initialization, DECL
12253 is considered undefined until an out-of-class
12254 definition is provided, unless this is an inline
12255 variable. */
12259 {
12265 }
12266 }
12267 else
12268 {
12271 unqualified_id);
12273 {
12275 unqualified_id);
12277 }
12282 {
12285 }
12288 {
12291 }
12294 {
12295 /* An attempt is being made to initialize a non-static
12296 member. This is new in C++11. */
12299 /* If this has been parsed with static storage class, but
12300 errors forced staticp to be cleared, ensure NSDMI is
12301 not present. */
12304 }
12305 }
12311 }
12312 }
12315 {
12316 tree original_name;
12324 else
12326 // FIXME:gcc_assert (original_name == dname);
12333 {
12336 name);
12337 else
12339 name);
12340 }
12344 /* Function declaration not at top level.
12345 Storage classes other than `extern' are not allowed
12346 and `extern' makes no difference. */
12351 {
12354 "%<static%> specifier invalid for function %qs "
12356 else
12358 "%<inline%> specifier invalid for function %qs "
12360 }
12363 {
12365 {
12368 }
12371 {
12376 }
12377 }
12379 /* Record whether the function is public. */
12386 publicp,
12389 sfk,
12390 funcdef_flag,
12391 late_return_type_p,
12400 {
12403 /* Don't allow a static member function in a class, and forbid
12404 declaring main to be static. */
12406 {
12410 }
12412 {
12413 /* 7.1.1: There can be no static function declarations within a
12414 block. */
12417 }
12420 {
12423 }
12424 }
12425 }
12426 else
12427 {
12428 /* It's a variable. */
12430 /* An uninitialized decl with `extern' is a reference. */
12432 declspecs,
12433 initialized,
12434 type_quals,
12435 inlinep,
12436 concept_p,
12437 template_count,
12447 {
12450 {
12455 }
12457 {
12460 }
12462 {
12464 "cannot explicitly declare member %q#D to have "
12467 }
12468 }
12470 {
12474 }
12479 {
12484 }
12485 }
12490 {
12494 }
12497 {
12499 {
12500 /* It's common practice (and completely valid) to have a const
12501 be initialized and declared extern. */
12504 }
12505 else
12506 {
12509 }
12510 }
12512 /* Record `register' declaration for warnings on &
12513 and in case doing stupid register allocation. */
12516 {
12518 /* Warn about register storage specifiers on PARM_DECLs. */
12520 {
12523 "ISO C++17 does not allow %<register%> storage "
12525 else
12528 }
12529 }
12535 /* Set constexpr flag on vars (functions got it in grokfndecl). */
12539 /* Record constancy and volatility on the DECL itself . There's
12540 no need to do this when processing a template; we'll do this
12541 for the instantiated declaration based on the type of DECL. */
12546 }
12547 }
12548 \f
12549 /* Subroutine of start_function. Ensure that each of the parameter
12550 types (as listed in PARMS) is complete, as is required for a
12551 function definition. */
12553 static void
12555 {
12557 {
12562 {
12568 }
12569 else
12570 /* grokparms or complete_type_or_else will have already issued
12571 an error. */
12573 }
12574 }
12576 /* Returns nonzero if T is a local variable. */
12578 int
12580 {
12582 /* A VAR_DECL with a context that is a _TYPE is a static data
12583 member. */
12585 /* Any other non-local variable must be at namespace scope. */
12591 }
12593 /* Like local_variable_p, but suitable for use as a tree-walking
12594 function. */
12596 static tree
12599 {
12607 }
12609 /* Check that ARG, which is a default-argument expression for a
12610 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
12611 something goes wrong. DECL may also be a _TYPE node, rather than a
12612 DECL, if there is no DECL available. */
12614 tree
12616 {
12617 tree var;
12618 tree decl_type;
12621 /* We get a DEFAULT_ARG when looking at an in-class declaration
12622 with a default argument. Ignore the argument for now; we'll
12623 deal with it after the class is complete. */
12627 {
12630 }
12631 else
12638 /* Something already went wrong. There's no need to check
12639 further. */
12642 /* [dcl.fct.default]
12644 A default argument expression is implicitly converted to the
12645 parameter type. */
12647 /* Avoid digest_init clobbering the initializer. */
12650 LOOKUP_IMPLICIT);
12653 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
12654 the call sites. */
12659 /* [dcl.fct.default]
12661 Local variables shall not be used in default argument
12662 expressions.
12664 The keyword `this' shall not be used in a default argument of a
12665 member function. */
12668 {
12670 {
12674 else
12676 }
12678 }
12680 /* All is well. */
12682 }
12684 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
12686 static tree
12688 {
12693 {
12696 else
12698 }
12700 /* Do warn about using typedefs to a deprecated class. */
12712 return type_is_deprecated
12716 }
12718 /* Decode the list of parameter types for a function type.
12719 Given the list of things declared inside the parens,
12720 return a list of types.
12722 If this parameter does not end with an ellipsis, we append
12723 void_list_node.
12725 *PARMS is set to the chain of PARM_DECLs created. */
12727 tree
12729 {
12732 tree parm;
12736 {
12749 {
12751 && !init
12754 /* DR 577: A parameter list consisting of a single
12755 unnamed parameter of non-dependent type 'void'. */
12759 "invalid use of cv-qualified type %qT in "
12761 else
12763 "invalid use of type %<void%> in parameter "
12765 /* It's not a good idea to actually create parameters of
12766 type `void'; other parts of the compiler assume that a
12767 void type terminates the parameter list. */
12770 }
12773 {
12775 {
12779 }
12781 /* Top-level qualifiers on the parameters are
12782 ignored for function types. */
12785 {
12789 }
12793 {
12794 /* Before C++17 DR 393:
12795 [dcl.fct]/6, parameter types cannot contain pointers
12796 (references) to arrays of unknown bound. */
12801 {
12809 }
12812 ptr
12818 }
12824 }
12829 }
12837 }
12839 \f
12840 /* D is a constructor or overloaded `operator='.
12842 Let T be the class in which D is declared. Then, this function
12843 returns:
12845 -1 if D's is an ill-formed constructor or copy assignment operator
12846 whose first parameter is of type `T'.
12847 0 if D is not a copy constructor or copy assignment
12848 operator.
12849 1 if D is a copy constructor or copy assignment operator whose
12850 first parameter is a reference to non-const qualified T.
12851 2 if D is a copy constructor or copy assignment operator whose
12852 first parameter is a reference to const qualified T.
12854 This function can be used as a predicate. Positive values indicate
12855 a copy constructor and nonzero values indicate a copy assignment
12856 operator. */
12858 int
12860 {
12861 tree args;
12862 tree arg_type;
12870 /* Instantiations of template member functions are never copy
12871 functions. Note that member functions of templated classes are
12872 represented as template functions internally, and we must
12873 accept those as copy functions. */
12885 {
12886 /* Pass by value copy assignment operator. */
12888 }
12892 {
12895 }
12896 else
12902 /* There are more non-optional args. */
12906 }
12908 /* D is a constructor or overloaded `operator='.
12910 Let T be the class in which D is declared. Then, this function
12911 returns true when D is a move constructor or move assignment
12912 operator, false otherwise. */
12914 bool
12916 {
12920 /* There are no move constructors if we are in C++98 mode. */
12926 /* Instantiations of template member functions are never move
12927 functions. Note that member functions of templated classes are
12928 represented as template functions internally, and we must
12929 accept those as move functions. */
12933 }
12935 /* D is a constructor or overloaded `operator='.
12937 Then, this function returns true when D has the same signature as a move
12938 constructor or move assignment operator (because either it is such a
12939 ctor/op= or it is a template specialization with the same signature),
12940 false otherwise. */
12942 bool
12944 {
12945 tree args;
12946 tree arg_type;
12966 /* There are more non-optional args. */
12970 }
12972 /* Remember any special properties of member function DECL. */
12974 void
12976 {
12977 tree class_type;
12984 {
12991 {
12992 /* [class.copy]
12994 A non-template constructor for class X is a copy
12995 constructor if its first parameter is of type X&, const
12996 X&, volatile X& or const volatile X&, and either there
12997 are no other parameters or else all other parameters have
12998 default arguments. */
13004 }
13015 }
13017 {
13018 /* [class.copy]
13020 A non-template assignment operator for class X is a copy
13021 assignment operator if its parameter is of type X, X&, const
13022 X&, volatile X& or const volatile X&. */
13027 {
13033 }
13036 }
13040 /* Destructors are handled in check_methods. */
13041 }
13043 /* Check a constructor DECL has the correct form. Complains
13044 if the class has a constructor of the form X(X). */
13046 bool
13048 {
13052 {
13053 /* [class.copy]
13055 A declaration of a constructor for a class X is ill-formed if
13056 its first parameter is of type (optionally cv-qualified) X
13057 and either there are no other parameters or else all other
13058 parameters have default arguments.
13060 We *don't* complain about member template instantiations that
13061 have this form, though; they can occur as we try to decide
13062 what constructor to use during overload resolution. Since
13063 overload resolution will never prefer such a constructor to
13064 the non-template copy constructor (which is either explicitly
13065 or implicitly defined), there's no need to worry about their
13066 existence. Theoretically, they should never even be
13067 instantiated, but that's hard to forestall. */
13071 }
13074 }
13076 /* DECL is a declaration for an overloaded or conversion operator. If
13077 COMPLAIN is true, errors are issued for invalid declarations. */
13079 bool
13081 {
13090 tree_code operator_code;
13093 {
13094 /* Conversion operators are TYPE_EXPR for the purposes of this
13095 function. */
13098 }
13099 else
13100 {
13107 }
13110 {
13111 /* operator new and operator delete are quite special. */
13114 {
13133 }
13135 /* [basic.std.dynamic.allocation]/1:
13137 A program is ill-formed if an allocation function is declared
13138 in a namespace scope other than global scope or declared
13139 static in global scope.
13141 The same also holds true for deallocation functions. */
13143 {
13145 {
13148 }
13151 {
13154 }
13155 }
13159 else
13160 {
13163 }
13166 }
13168 /* An operator function must either be a non-static member function
13169 or have at least one parameter of a class, a reference to a class,
13170 an enumeration, or a reference to an enumeration. 13.4.0.6 */
13172 {
13178 {
13181 }
13184 {
13188 }
13191 {
13193 {
13198 }
13204 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
13205 because these checks are performed even on template
13206 functions. */
13210 }
13211 }
13214 /* There are no further restrictions on the arguments to an overloaded
13215 "operator ()". */
13219 {
13220 /* 13.4.0.3 */
13223 }
13225 /* Count the number of arguments and check for ellipsis. */
13228 {
13230 {
13231 /* Variadic. */
13234 }
13236 }
13238 /* Verify correct number of arguments. */
13240 {
13243 {
13244 /* We have a unary instance of an ambi-ary op. Remap to the
13245 unary one. */
13251 }
13253 {
13254 /* This was an ambiguous operator but is invalid. */
13259 }
13262 && ! processing_template_decl
13263 /* x++ and x--'s second argument must be an int. */
13265 integer_type_node))
13266 {
13270 decl);
13272 }
13277 {
13282 }
13287 {
13292 }
13297 }
13299 /* There can be no default arguments. */
13302 {
13308 else
13309 {
13312 }
13313 }
13315 /* At this point the declaration is well-formed. It may not be
13316 sensible though. */
13318 /* Check member function warnings only on the in-class declaration.
13319 There's no point warning on an out-of-class definition. */
13323 /* Warn about conversion operators that will never be used. */
13327 {
13336 ref
13342 {
13345 ref
13350 /* Don't force t to be complete here. */
13355 ref
13360 }
13361 }
13366 /* Effective C++ rules below. */
13368 /* More Effective C++ rule 7. */
13375 /* More Effective C++ rule 6. */
13380 {
13389 {
13394 }
13395 else
13396 {
13399 }
13400 }
13402 /* Effective C++ rule 23. */
13413 }
13414 \f
13415 /* Return a string giving the keyword associate with CODE. */
13419 {
13421 {
13434 }
13435 }
13437 /* Name lookup in an elaborated-type-specifier (after the keyword
13438 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
13439 elaborated-type-specifier is invalid, issue a diagnostic and return
13440 error_mark_node; otherwise, return the *_TYPE to which it referred.
13441 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
13443 tree
13445 tree decl,
13447 {
13448 tree type;
13450 /* In the case of:
13452 struct S { struct S *p; };
13454 name lookup will find the TYPE_DECL for the implicit "S::S"
13455 typedef. Adjust for that here. */
13461 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
13462 is false for this case as well. */
13464 {
13468 }
13469 /* Accept template template parameters. */
13473 ;
13474 /* [dcl.type.elab]
13476 If the identifier resolves to a typedef-name or the
13477 simple-template-id resolves to an alias template
13478 specialization, the elaborated-type-specifier is ill-formed.
13480 In other words, the only legitimate declaration to use in the
13481 elaborated type specifier is the implicit typedef created when
13482 the type is declared. */
13486 {
13490 else
13495 }
13500 {
13504 }
13507 {
13511 }
13515 {
13516 /* If a class template appears as elaborated type specifier
13517 without a template header such as:
13519 template <class T> class C {};
13520 void f(class C); // No template header here
13522 then the required template argument is missing. */
13527 }
13530 }
13532 /* Lookup NAME in elaborate type specifier in scope according to
13533 SCOPE and issue diagnostics if necessary.
13534 Return *_TYPE node upon success, NULL_TREE when the NAME is not
13535 found, and ERROR_MARK_NODE for type error. */
13537 static tree
13540 {
13541 tree t;
13542 tree decl;
13544 {
13545 /* First try ordinary name lookup, ignoring hidden class name
13546 injected via friend declaration. */
13549 /* If that fails, the name will be placed in the smallest
13550 non-class, non-function-prototype scope according to 3.3.1/5.
13551 We may already have a hidden name declared as friend in this
13552 scope. So lookup again but not ignoring hidden names.
13553 If we find one, that name will be made visible rather than
13554 creating a new tag. */
13557 }
13558 else
13563 /* If scope is ts_current we're defining a class, so ignore a
13564 template template parameter. */
13570 {
13571 /* Look for invalid nested type:
13572 class C {
13573 class C {};
13574 }; */
13576 {
13579 decl);
13581 }
13583 /* Two cases we need to consider when deciding if a class
13584 template is allowed as an elaborated type specifier:
13585 1. It is a self reference to its own class.
13586 2. It comes with a template header.
13588 For example:
13590 template <class T> class C {
13591 class C *c1; // DECL_SELF_REFERENCE_P is true
13592 class D;
13593 };
13594 template <class U> class C; // template_header_p is true
13595 template <class T> class C<T>::D {
13596 class C *c2; // DECL_SELF_REFERENCE_P is true
13597 }; */
13600 decl,
13601 template_header_p
13606 {
13615 }
13618 }
13620 {
13624 }
13625 else
13627 }
13629 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
13630 Define the tag as a forward-reference if it is not defined.
13632 If a declaration is given, process it here, and report an error if
13633 multiple declarations are not identical.
13635 SCOPE is TS_CURRENT when this is also a definition. Only look in
13636 the current frame for the name (since C++ allows new names in any
13637 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
13638 declaration. Only look beginning from the current scope outward up
13639 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
13641 TEMPLATE_HEADER_P is true when this declaration is preceded by
13642 a set of template parameters. */
13644 static tree
13647 {
13654 {
13667 }
13669 /* In case of anonymous name, xref_tag is only called to
13670 make type node and push name. Name lookup is not required. */
13681 {
13685 /* Since SCOPE is not TS_CURRENT, we are not looking at a
13686 definition of this tag. Since, in addition, we are currently
13687 processing a (member) template declaration of a template
13688 class, we must be very careful; consider:
13690 template <class X> struct S1
13692 template <class U> struct S2
13693 {
13694 template <class V> friend struct S1;
13695 };
13697 Here, the S2::S1 declaration should not be confused with the
13698 outer declaration. In particular, the inner version should
13699 have a template parameter of level 2, not level 1.
13701 On the other hand, when presented with:
13703 template <class T> struct S1
13704 {
13705 template <class U> struct S2 {};
13706 template <class U> friend struct S2;
13707 };
13709 the friend must find S1::S2 eventually. We accomplish this
13710 by making sure that the new type we create to represent this
13711 declaration has the right TYPE_CONTEXT. */
13714 }
13717 {
13718 /* If no such tag is yet defined, create a forward-reference node
13719 and record it as the "definition".
13720 When a real declaration of this type is found,
13721 the forward-reference will be altered into a real type. */
13723 {
13726 }
13727 else
13728 {
13732 {
13733 /* Mark it as a lambda type. */
13735 /* And push it into current scope. */
13737 }
13739 }
13740 }
13741 else
13742 {
13744 {
13745 /* Check that we aren't trying to overload a class with different
13746 constraints. */
13749 {
13752 }
13755 }
13759 {
13763 }
13766 {
13767 /* This is no longer an invisible friend. Make it
13768 visible. */
13775 {
13779 }
13780 }
13781 }
13784 }
13786 /* Wrapper for xref_tag_1. */
13788 tree
13791 {
13792 tree ret;
13798 }
13801 tree
13803 {
13808 else
13815 }
13817 /* Create the binfo hierarchy for REF with (possibly NULL) base list
13818 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
13819 access_* node, and the TREE_VALUE is the type of the base-class.
13820 Non-NULL TREE_TYPE indicates virtual inheritance. */
13822 void
13824 {
13831 tree default_access;
13837 /* The base of a derived class is private by default, all others are
13838 public. */
13843 /* First, make sure that any templates in base-classes are
13844 instantiated. This ensures that if we call ourselves recursively
13845 we do not get confused about which classes are marked and which
13846 are not. */
13849 {
13852 /* The dependent_type_p call below should really be dependent_scope_p
13853 so that we give a hard error about using an incomplete type as a
13854 base, but we allow it with a pedwarn for backward
13855 compatibility. */
13861 /* An incomplete type. Remove it from the list. */
13863 else
13864 {
13865 max_bases++;
13867 max_dvbases++;
13871 }
13872 }
13877 /* The binfo slot should be empty, unless this is an (ill-formed)
13878 redefinition. */
13889 /* Apply base-class info set up to the variants of this type. */
13893 {
13895 /* A C++98 POD cannot have base classes. */
13899 {
13902 }
13903 }
13910 {
13911 /* An aggregate can't have virtual base classes. */
13919 }
13922 {
13930 /* Before C++17, an aggregate cannot have base classes. In C++17, an
13931 aggregate can't have virtual, private, or protected base classes. */
13942 {
13944 basetype);
13946 }
13950 {
13952 /* The original basetype could have been a typedef'd type. */
13955 /* Inherit flags from the base. */
13966 }
13968 /* We must do this test after we've seen through a typedef
13969 type. */
13971 {
13974 else
13977 }
13980 /* Regenerate the pack expansion for the bases. */
13994 dropped_base:
13995 /* Update max_vbases to reflect the reality that we are dropping
13996 this base: if it reaches zero we want to undo the vec_alloc
13997 above to avoid inconsistencies during error-recovery: eg, in
13998 build_special_member_call, CLASSTYPE_VBASECLASSES non null
13999 and vtt null (c++/27952). */
14001 max_vbases--;
14003 max_vbases
14005 }
14012 /* If we didn't get max_vbases vbases, we must have shared at
14013 least one of them, and are therefore diamond shaped. */
14016 /* Unmark all the types. */
14021 /* Now see if we have a repeated base type. */
14023 {
14026 {
14028 {
14031 }
14033 }
14038 else
14040 }
14041 }
14043 \f
14044 /* Copies the enum-related properties from type SRC to type DST.
14045 Used with the underlying type of an enum and the enum itself. */
14046 static void
14048 {
14049 tree t;
14051 {
14061 else
14065 }
14066 }
14068 /* Begin compiling the definition of an enumeration type.
14069 NAME is its name,
14071 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
14073 UNDERLYING_TYPE is the type that will be used as the storage for
14074 the enumeration type. This should be NULL_TREE if no storage type
14075 was specified.
14077 ATTRIBUTES are any attributes specified after the enum-key.
14079 SCOPED_ENUM_P is true if this is a scoped enumeration type.
14081 if IS_NEW is not NULL, gets TRUE iff a new type is created.
14083 Returns the type object, as yet incomplete.
14084 Also records info about it so that build_enumerator
14085 may be used to declare the individual values as they are read. */
14087 tree
14090 {
14096 /* [C++0x dcl.enum]p5:
14098 If not explicitly specified, the underlying type of a scoped
14099 enumeration type is int. */
14106 /* If this is the real definition for a previous forward reference,
14107 fill in the contents in the same object that used to be the
14108 forward reference. */
14114 /* In case of a template_decl, the only check that should be deferred
14115 to instantiation time is the comparison of underlying types. */
14117 {
14119 {
14125 }
14127 {
14133 }
14139 {
14145 }
14146 }
14150 {
14151 /* In case of error, make a dummy enum to allow parsing to
14152 continue. */
14154 {
14157 }
14159 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
14160 of an opaque enum, or an opaque enum of an already defined
14161 enumeration (C++0x only).
14162 In any other case, it'll be NULL_TREE. */
14164 {
14167 }
14170 /* Do not push the decl more than once, unless we need to
14171 compare underlying types at instantiation time */
14174 || (underlying_type
14178 {
14182 /* std::byte aliases anything. */
14187 }
14188 else
14195 /* The enum is considered opaque until the opening '{' of the
14196 enumerator list. */
14199 }
14206 {
14208 /* We already checked that it matches, don't change it to a different
14211 {
14214 }
14217 else
14220 }
14222 /* If into a template class, the returned enum is always the first
14223 declaration (opaque or not) seen. This way all the references to
14224 this type will be to the same declaration. The following ones are used
14225 only to check for definition errors. */
14228 else
14230 }
14232 /* After processing and defining all the values of an enumeration type,
14233 install their decls in the enumeration type.
14234 ENUMTYPE is the type object. */
14236 void
14238 {
14239 tree values;
14240 tree underlying_type;
14241 tree decl;
14242 tree value;
14244 tree t;
14246 bool fixed_underlying_type_p
14249 /* We built up the VALUES in reverse order. */
14252 /* For an enum defined in a template, just set the type of the values;
14253 all further processing is postponed until the template is
14254 instantiated. We need to set the type so that tsubst of a CONST_DECL
14255 works. */
14257 {
14259 values;
14263 }
14265 /* Determine the minimum and maximum values of the enumerators. */
14267 {
14271 values;
14273 {
14276 /* [dcl.enum]: Following the closing brace of an enum-specifier,
14277 each enumerator has the type of its enumeration. Prior to the
14278 closing brace, the type of each enumerator is the type of its
14279 initializing value. */
14282 /* Update the minimum and maximum values, if appropriate. */
14286 /* Figure out what the minimum and maximum values of the
14287 enumerators are. */
14294 }
14295 }
14296 else
14297 /* [dcl.enum]
14299 If the enumerator-list is empty, the underlying type is as if
14300 the enumeration had a single enumerator with value 0. */
14304 {
14305 /* Compute the number of bits require to represent all values of the
14306 enumeration. We must do this before the type of MINNODE and
14307 MAXNODE are transformed, since tree_int_cst_min_precision relies
14308 on the TREE_TYPE of the value it is passed. */
14316 /* Determine the underlying type of the enumeration.
14318 [dcl.enum]
14320 The underlying type of an enumeration is an integral type that
14321 can represent all the enumerator values defined in the
14322 enumeration. It is implementation-defined which integral type is
14323 used as the underlying type for an enumeration except that the
14324 underlying type shall not be larger than int unless the value of
14325 an enumerator cannot fit in an int or unsigned int.
14327 We use "int" or an "unsigned int" as the underlying type, even if
14328 a smaller integral type would work, unless the user has
14329 explicitly requested that we use the smallest possible type. The
14330 user can request that for all enumerations with a command line
14331 flag, or for just one enumeration with an attribute. */
14333 use_short_enum = flag_short_enums
14336 /* If the precision of the type was specified with an attribute and it
14337 was too small, give an error. Otherwise, use it. */
14339 {
14342 else
14343 {
14346 }
14347 }
14351 itk++)
14352 {
14358 }
14360 {
14361 /* DR 377
14363 IF no integral type can represent all the enumerator values, the
14364 enumeration is ill-formed. */
14369 }
14371 /* [dcl.enum]
14373 The value of sizeof() applied to an enumeration type, an object
14374 of an enumeration type, or an enumerator, is the value of sizeof()
14375 applied to the underlying type. */
14378 /* Compute the minimum and maximum values for the type.
14380 [dcl.enum]
14382 For an enumeration where emin is the smallest enumerator and emax
14383 is the largest, the values of the enumeration are the values of the
14384 underlying type in the range bmin to bmax, where bmin and bmax are,
14385 respectively, the smallest and largest values of the smallest bit-
14386 field that can store emin and emax. */
14388 /* The middle-end currently assumes that types with TYPE_PRECISION
14389 narrower than their underlying type are suitably zero or sign
14390 extended to fill their mode. Similarly, it assumes that the front
14391 end assures that a value of a particular type must be within
14392 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
14394 We used to set these fields based on bmin and bmax, but that led
14395 to invalid assumptions like optimizing away bounds checking. So
14396 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
14397 TYPE_MAX_VALUE to the values for the mode above and only restrict
14398 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
14402 set_min_and_max_values_for_integral_type
14405 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
14408 }
14409 else
14412 /* Convert each of the enumerators to the type of the underlying
14413 type of the enumeration. */
14415 {
14416 location_t saved_location;
14422 /* If the enumeration type has a fixed underlying type, we
14423 already checked all of the enumerator values. */
14425 else
14428 tf_warning_or_error);
14431 /* Do not clobber shared ints. */
14433 {
14437 }
14439 }
14441 /* Fix up all variant types of this enum type. */
14448 {
14450 /* TYPE_FIELDS needs fixup. */
14452 }
14454 /* Finish debugging output for this type. */
14457 /* Each enumerator now has the type of its enumeration. Clear the cache
14458 so that this change in types doesn't confuse us later on. */
14460 }
14462 /* Finishes the enum type. This is called only the first time an
14463 enumeration is seen, be it opaque or odinary.
14464 ENUMTYPE is the type object. */
14466 void
14468 {
14470 {
14474 }
14476 /* If this is a forward declaration, there should not be any variants,
14477 though we can get a variant in the middle of an enum-specifier with
14478 wacky code like 'enum E { e = sizeof(const E*) };' */
14482 }
14484 /* Build and install a CONST_DECL for an enumeration constant of the
14485 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
14486 Apply ATTRIBUTES if available. LOC is the location of NAME.
14487 Assignment of sequential values by default is handled here. */
14489 void
14491 location_t loc)
14492 {
14493 tree decl;
14494 tree context;
14495 tree type;
14497 /* scalar_constant_value will pull out this expression, so make sure
14498 it's folded as appropriate. */
14502 /* If the VALUE was erroneous, pretend it wasn't there; that will
14503 result in the enum being assigned the next value in sequence. */
14507 /* Remove no-op casts from the value. */
14512 {
14513 /* Validate and default VALUE. */
14515 {
14517 {
14522 }
14525 value = perform_implicit_conversion_flags
14533 {
14536 {
14540 }
14541 else
14542 {
14546 {
14550 }
14551 }
14552 }
14553 }
14555 /* Default based on previous value. */
14557 {
14559 {
14560 tree prev_value;
14563 /* C++03 7.2/4: If no initializer is specified for the first
14564 enumerator, the type is an unspecified integral
14565 type. Otherwise the type is the same as the type of the
14566 initializing value of the preceding enumerator unless the
14567 incremented value is not representable in that type, in
14568 which case the type is an unspecified integral type
14569 sufficient to contain the incremented value. */
14573 else
14574 {
14580 {
14583 {
14586 {
14592 }
14599 }
14602 else
14604 }
14607 {
14610 }
14611 }
14612 }
14613 else
14615 }
14617 /* Remove no-op casts from the value. */
14620 /* If the underlying type of the enum is fixed, check whether
14621 the enumerator values fits in the underlying type. If it
14622 does not fit, the program is ill-formed [C++0x dcl.enum]. */
14624 && value
14626 {
14631 /* Convert the value to the appropriate type. */
14633 }
14634 }
14636 /* C++ associates enums with global, function, or class declarations. */
14639 /* Build the actual enumeration constant. Note that the enumeration
14640 constants have the underlying type of the enum (if it is fixed)
14641 or the type of their initializer (if the underlying type of the
14642 enum is not fixed):
14644 [ C++0x dcl.enum ]
14646 If the underlying type is fixed, the type of each enumerator
14647 prior to the closing brace is the underlying type; if the
14648 initializing value of an enumerator cannot be represented by
14649 the underlying type, the program is ill-formed. If the
14650 underlying type is not fixed, the type of each enumerator is
14651 the type of its initializing value.
14653 If the underlying type is not fixed, it will be computed by
14654 finish_enum and we will reset the type of this enumerator. Of
14655 course, if we're processing a template, there may be no value. */
14669 {
14670 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
14671 on the TYPE_FIELDS list for `S'. (That's so that you can say
14672 things like `S::i' later.) */
14674 /* The enumerator may be getting declared outside of its enclosing
14675 class, like so:
14677 class S { public: enum E : int; }; enum S::E : int { i = 7; };
14679 For which case we need to make sure that the access of `S::i'
14680 matches the access of `S::E'. */
14686 else
14692 }
14693 else
14696 /* Add this enumeration constant to the list for this type. */
14698 }
14700 /* Look for an enumerator with the given NAME within the enumeration
14701 type ENUMTYPE. This routine is used primarily for qualified name
14702 lookup into an enumerator in C++0x, e.g.,
14704 enum class Color { Red, Green, Blue };
14706 Color color = Color::Red;
14708 Returns the value corresponding to the enumerator, or
14709 NULL_TREE if no such enumerator was found. */
14710 tree
14712 {
14713 tree e;
14718 }
14720 \f
14721 /* We're defining DECL. Make sure that its type is OK. */
14723 static void
14725 {
14729 /* In a function definition, arg types must be complete. */
14736 {
14741 /* Make it return void instead. */
14744 void_type_node,
14746 else
14748 fntype = (cp_build_type_attribute_variant
14752 }
14753 else
14754 {
14758 }
14759 }
14761 /* True iff FN is an implicitly-defined default constructor. */
14763 static bool
14765 {
14769 }
14771 /* Clobber the contents of *this to let the back end know that the object
14772 storage is dead when we enter the constructor or leave the destructor. */
14774 static tree
14776 {
14777 /* Clobbering an empty base is pointless, and harmful if its one byte
14778 TYPE_SIZE overlays real data. */
14782 /* If we have virtual bases, clobber the whole object, but only if we're in
14783 charge. If we don't have virtual bases, clobber the as-base type so we
14784 don't mess with tail padding. */
14795 {
14798 }
14805 }
14807 /* Create the FUNCTION_DECL for a function definition.
14808 DECLSPECS and DECLARATOR are the parts of the declaration;
14809 they describe the function's name and the type it returns,
14810 but twisted together in a fashion that parallels the syntax of C.
14812 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
14813 DECLARATOR is really the DECL for the function we are about to
14814 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
14815 indicating that the function is an inline defined in-class.
14817 This function creates a binding context for the function body
14818 as well as setting up the FUNCTION_DECL in current_function_decl.
14820 For C++, we must first check whether that datum makes any sense.
14821 For example, "class A local_a(1,2);" means that variable local_a
14822 is an aggregate of type A, which should have a constructor
14823 applied to it with the argument list [1, 2].
14825 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
14826 or may be a BLOCK if the function has been defined previously
14827 in this translation unit. On exit, DECL_INITIAL (decl1) will be
14828 error_mark_node if the function has never been defined, or
14829 a BLOCK if the function has been defined somewhere. */
14831 bool
14833 {
14835 tree fntype;
14836 tree restype;
14839 tree current_function_parms;
14844 /* Sanity check. */
14852 /* ISO C++ 11.4/5. A friend function defined in a class is in
14853 the (lexical) scope of the class in which it is defined. */
14855 {
14858 /* CTYPE could be null here if we're dealing with a template;
14859 for example, `inline friend float foo()' inside a template
14860 will have no CTYPE set. */
14863 else
14865 }
14872 /* Handle gnu_inline attribute. */
14874 {
14879 }
14882 /* This is a constructor, we must ensure that any default args
14883 introduced by this definition are propagated to the clones
14884 now. The clones are used directly in overload resolution. */
14887 /* Sometimes we don't notice that a function is a static member, and
14888 build a METHOD_TYPE for it. Fix that up now. */
14892 /* Set up current_class_type, and enter the scope of the class, if
14893 appropriate. */
14899 /* Now that we have entered the scope of the class, we must restore
14900 the bindings for any template parameters surrounding DECL1, if it
14901 is an inline member template. (Order is important; consider the
14902 case where a template parameter has the same name as a field of
14903 the class.) It is not until after this point that
14904 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
14908 /* Effective C++ rule 15. */
14916 /* Make the init_value nonzero so pushdecl knows this is not tentative.
14917 error_mark_node is replaced below (in poplevel) with the BLOCK. */
14921 /* This function exists in static storage.
14922 (This does not mean `static' in the C sense!) */
14925 /* We must call push_template_decl after current_class_type is set
14926 up. (If we are processing inline definitions after exiting a
14927 class scope, current_class_type will be NULL_TREE until set above
14928 by push_nested_class.) */
14930 {
14933 {
14937 }
14939 }
14941 /* Make sure the parameter and return types are reasonable. When
14942 you declare a function, these types can be incomplete, but they
14943 must be complete when you define the function. */
14946 /* Build the return declaration for the function. */
14950 {
14951 tree resdecl;
14959 }
14961 /* Record the decl so that the function name is defined.
14962 If we already have a decl for this name, and it is a FUNCTION_DECL,
14963 use the old decl. */
14965 {
14966 /* A specialization is not used to guide overload resolution. */
14970 {
14974 /* If something went wrong when registering the declaration,
14975 use DECL1; we have to have a FUNCTION_DECL to use when
14976 parsing the body of the function. */
14977 ;
14978 else
14979 {
14980 /* Otherwise, OLDDECL is either a previous declaration
14981 of the same function or DECL1 itself. */
14988 {
14989 tree context;
14991 /* Check whether DECL1 is in an anonymous
14992 namespace. */
14994 context;
14996 {
15000 }
15004 OPT_Wmissing_declarations,
15006 }
15009 }
15010 }
15011 else
15012 {
15013 /* We need to set the DECL_CONTEXT. */
15016 }
15020 /* If #pragma weak applies, mark the decl appropriately now.
15021 The pragma only applies to global functions. Because
15022 determining whether or not the #pragma applies involves
15023 computing the mangled name for the declaration, we cannot
15024 apply the pragma until after we have merged this declaration
15025 with any previous declarations; if the original declaration
15026 has a linkage specification, that specification applies to
15027 the definition as well, and may affect the mangled name. */
15030 }
15032 /* We are now in the scope of the function being defined. */
15035 /* Save the parm names or decls from this function's declarator
15036 where store_parm_decls will find them. */
15039 /* Let the user know we're compiling this function. */
15044 /* This function may already have been parsed, in which case just
15045 return; our caller will skip over the body without parsing. */
15049 /* Initialize RTL machinery. We cannot do this until
15050 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
15051 even when processing a template; this is how we get
15052 CFUN set up, and our per-function variables initialized.
15053 FIXME factor out the non-RTL stuff. */
15057 /* Initialize the language data structures. Whenever we start
15058 a new function, we destroy temporaries in the usual way. */
15064 {
15067 }
15069 /* Start the statement-tree, start the tree now. */
15072 /* If we are (erroneously) defining a function that we have already
15073 defined before, wipe out what we knew before. */
15078 {
15079 /* We know that this was set up by `grokclassfn'. We do not
15080 wait until `store_parm_decls', since evil parse errors may
15081 never get us to that point. Here we keep the consistency
15082 between `current_class_type' and `current_class_ptr'. */
15088 cp_function_chain->x_current_class_ref
15090 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
15093 /* Constructors and destructors need to know whether they're "in
15094 charge" of initializing virtual base classes. */
15097 {
15100 }
15102 {
15105 }
15106 }
15109 /* Implicitly-defined methods (like the
15110 destructor for a class in which no destructor
15111 is explicitly declared) must not be defined
15112 until their definition is needed. So, we
15113 ignore interface specifications for
15114 compiler-generated functions. */
15120 {
15127 /* This is a function in a local class in an extern inline
15128 or template function. */
15130 }
15131 /* If this function belongs to an interface, it is public.
15132 If it belongs to someone else's interface, it is also external.
15133 This only affects inlines and template instantiations. */
15135 {
15138 {
15142 && ! flag_implement_inlines
15145 /* For WIN32 we also want to put these in linkonce sections. */
15147 }
15148 else
15151 /* If this function is in an interface implemented in this file,
15152 make sure that the back end knows to emit this function
15153 here. */
15156 }
15159 {
15160 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
15161 interface, we will have both finfo->interface_unknown and
15162 finfo->interface_only set. In that case, we don't want to
15163 use the normal heuristics because someone will supply a
15164 #pragma implementation elsewhere, and deducing it here would
15165 produce a conflict. */
15170 }
15171 else
15172 {
15173 /* This is a definition, not a reference.
15174 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
15182 else
15184 }
15186 /* Determine the ELF visibility attribute for the function. We must not
15187 do this before calling "pushdecl", as we must allow "duplicate_decls"
15188 to merge any attributes appropriately. We also need to wait until
15189 linkage is set. */
15203 {
15206 }
15216 /* Clobbering an empty base is harmful if it overlays real data. */
15218 /* We can't clobber safely for an implicitly-defined default constructor
15219 because part of the initialization might happen before we enter the
15220 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
15234 }
15237 /* Like start_preparsed_function, except that instead of a
15238 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
15240 Returns true on success. If the DECLARATOR is not suitable
15241 for a function, we return false, which tells the parser to
15242 skip the entire function. */
15244 bool
15247 tree attrs)
15248 {
15249 tree decl1;
15255 /* If the declarator is not suitable for a function definition,
15256 cause a syntax error. */
15258 {
15261 }
15264 /* main must return int. grokfndecl should have corrected it
15265 (and issued a diagnostic) if the user got it wrong. */
15267 integer_type_node));
15270 }
15271 \f
15272 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
15273 FN. */
15275 static bool
15277 {
15279 && !processing_template_decl
15281 /* We insert the EH_SPEC_BLOCK only in the original
15282 function; then, it is copied automatically to the
15283 clones. */
15285 /* Implicitly-generated constructors and destructors have
15286 exception specifications. However, those specifications
15287 are the union of the possible exceptions specified by the
15288 constructors/destructors for bases and members, so no
15289 unallowed exception will ever reach this function. By
15290 not creating the EH_SPEC_BLOCK we save a little memory,
15291 and we avoid spurious warnings about unreachable
15292 code. */
15294 }
15296 /* Store the parameter declarations into the current function declaration.
15297 This is called after parsing the parameter declarations, before
15298 digesting the body of the function.
15300 Also install to binding contour return value identifier, if any. */
15302 static void
15304 {
15306 tree parm;
15308 /* This is a chain of any other decls that came in among the parm
15309 declarations. If a parm is declared with enum {foo, bar} x;
15310 then CONST_DECLs for foo and bar are put here. */
15314 {
15315 /* This case is when the function was defined with an ANSI prototype.
15316 The parms already have decls, so we need not do anything here
15317 except record them as in effect
15318 and complain if any redundant old-style parm decls were written. */
15321 tree next;
15323 /* Must clear this because it might contain TYPE_DECLs declared
15324 at class level. */
15327 /* If we're doing semantic analysis, then we'll call pushdecl
15328 for each of these. We must do them in reverse order so that
15329 they end in the correct forward order. */
15333 {
15337 else
15338 {
15339 /* If we find an enum constant or a type tag,
15340 put it aside for the moment. */
15343 }
15344 }
15346 /* Get the decls in their original chain order and record in the
15347 function. This is all and only the PARM_DECLs that were
15348 pushed into scope by the loop above. */
15350 }
15351 else
15354 /* Now store the final chain of decls for the arguments
15355 as the decl-chain of the current lexical scope.
15356 Put the enumerators in as well, at the front so that
15357 DECL_ARGUMENTS is not modified. */
15362 }
15364 \f
15365 /* We have finished doing semantic analysis on DECL, but have not yet
15366 generated RTL for its body. Save away our current state, so that
15367 when we want to generate RTL later we know what to do. */
15369 static void
15371 {
15374 /* Save the language-specific per-function data so that we can
15375 get it back when we really expand this function. */
15378 /* Make a copy. */
15383 /* Clear out the bits we don't need. */
15388 }
15391 /* Set the return value of the constructor (if present). */
15393 static void
15395 {
15396 tree val;
15397 tree exprstmt;
15400 {
15401 /* Any return from a constructor will end up here. */
15407 /* Return the address of the object. */
15410 }
15411 }
15413 /* Do all the processing for the beginning of a destructor; set up the
15414 vtable pointers and cleanups for bases and members. */
15416 static void
15418 {
15419 tree compound_stmt;
15421 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
15422 issued an error message. We still want to try to process the
15423 body of the function, but initialize_vtbl_ptrs will crash if
15424 TYPE_BINFO is NULL. */
15426 {
15428 /* Make all virtual function table pointers in non-virtual base
15429 classes point to CURRENT_CLASS_TYPE's virtual function
15430 tables. */
15435 /* Clobbering an empty base is harmful if it overlays real data. */
15437 {
15441 {
15443 tree ref
15450 tf_warning_or_error);
15452 }
15453 else
15455 }
15457 /* And insert cleanups for our bases and members so that they
15458 will be properly destroyed if we throw. */
15460 }
15461 }
15463 /* At the end of every destructor we generate code to delete the object if
15464 necessary. Do that now. */
15466 static void
15468 {
15469 tree exprstmt;
15471 /* Any return from a destructor will end up here; that way all base
15472 and member cleanups will be run when the function returns. */
15476 {
15477 tree val;
15482 /* Return the address of the object. */
15485 }
15486 }
15488 /* Do the necessary processing for the beginning of a function body, which
15489 in this case includes member-initializers, but not the catch clauses of
15490 a function-try-block. Currently, this means opening a binding level
15491 for the member-initializers (in a ctor), member cleanups (in a dtor),
15492 and capture proxies (in a lambda operator()). */
15494 tree
15496 {
15497 tree stmt;
15504 else
15505 /* Always keep the BLOCK node associated with the outermost pair of
15506 curly braces of a function. These are needed for correct
15507 operation of dwarfout.c. */
15518 }
15520 /* Do the processing for the end of a function body. Currently, this means
15521 closing out the cleanups for fully-constructed bases and members, and in
15522 the case of the destructor, deleting the object if desired. Again, this
15523 is only meaningful for [cd]tors, since they are the only functions where
15524 there is a significant distinction between the main body and any
15525 function catch clauses. Handling, say, main() return semantics here
15526 would be wrong, as flowing off the end of a function catch clause for
15527 main() would also need to return 0. */
15529 void
15531 {
15535 /* Close the block. */
15544 }
15546 /* Given a function, returns the BLOCK corresponding to the outermost level
15547 of curly braces, skipping the artificial block created for constructor
15548 initializers. */
15550 tree
15552 {
15562 }
15564 /* If FNDECL is a class's key method, add the class to the list of
15565 keyed classes that should be emitted. */
15567 static void
15569 {
15573 {
15577 }
15578 }
15580 /* Subroutine of finish_function.
15581 Save the body of constexpr functions for possible
15582 future compile time evaluation. */
15584 static void
15586 {
15592 }
15594 /* Finish up a function declaration and compile that function
15595 all the way to assembler language output. The free the storage
15596 for the function definition. INLINE_P is TRUE if we just
15597 finished processing the body of an in-class inline function
15598 definition. (This processing will have taken place after the
15599 class definition is complete.) */
15601 tree
15603 {
15607 /* When we get some parse errors, we can end up without a
15608 current_function_decl, so cope. */
15621 /* TREE_READONLY (fndecl) = 1;
15622 This caused &foo to be of type ptr-to-const-function
15623 which then got a warning when stored in a ptr-to-function variable. */
15626 /* The current function is being defined, so its DECL_INITIAL should
15627 be set, and unless there's a multiple definition, it should be
15628 error_mark_node. */
15631 /* For a cloned function, we've already got all the code we need;
15632 there's no need to add any extra bits. */
15634 {
15635 /* Make it so that `main' always returns 0 by default. */
15642 current_eh_spec_block);
15643 }
15645 /* If we're saving up tree structure, tie off the function now. */
15650 /* If this function can't throw any exceptions, remember that. */
15653 && !flag_non_call_exceptions
15657 /* This must come after expand_function_end because cleanups might
15658 have declarations (from inline functions) that need to go into
15659 this function's blocks. */
15661 /* If the current binding level isn't the outermost binding level
15662 for this function, either there is a bug, or we have experienced
15663 syntax errors and the statement tree is malformed. */
15665 {
15666 /* Make sure we have already experienced errors. */
15669 /* Throw away the broken statement tree and extra binding
15670 levels. */
15674 {
15677 else
15679 }
15680 }
15683 /* Statements should always be full-expressions at the outermost set
15684 of curly braces for a function. */
15687 /* If there are no return statements in a function with auto return type,
15688 the return type is void. But if the declared type is something like
15689 auto*, this is an error. */
15692 {
15694 {
15697 }
15700 {
15702 current_function_auto_return_pattern);
15705 }
15706 }
15708 // If this is a concept, check that the definition is reasonable.
15712 /* Lambda closure members are implicitly constexpr if possible. */
15716 = ((processing_template_decl
15720 /* Save constexpr function body before it gets munged by
15721 the NRV transformation. */
15724 /* Invoke the pre-genericize plugin before we start munging things. */
15728 /* Perform delayed folding before NRV transformation. */
15732 /* Set up the named return value optimization, if we can. Candidate
15733 variables are selected in check_return_expr. */
15735 {
15737 tree outer;
15740 /* This is only worth doing for fns that return in memory--and
15741 simpler, since we don't have to worry about promoted modes. */
15743 /* Only allow this for variables declared in the outer scope of
15744 the function so we know that their lifetime always ends with a
15745 return; see g++.dg/opt/nrv6.C. We could be more flexible if
15746 we were to do this optimization in tree-ssa. */
15752 }
15754 /* Remember that we were in class scope. */
15758 /* Must mark the RESULT_DECL as being in this function. */
15761 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
15762 to the FUNCTION_DECL node itself. */
15765 /* Save away current state, if appropriate. */
15769 /* Complain if there's just no return statement. */
15774 /* Don't complain if we abort or throw. */
15775 && !current_function_returns_abnormally
15776 /* Don't complain if there's an infinite loop. */
15777 && !current_function_infinite_loop
15778 /* Don't complain if we are declared noreturn. */
15782 /* Structor return values (if any) are set by the compiler. */
15786 {
15790 }
15792 /* Store the end of the function, so that we get good line number
15793 info for the epilogue. */
15796 /* Complain about parameters that are only set, but never otherwise used. */
15798 && !processing_template_decl
15801 {
15802 tree decl;
15805 decl;
15819 OPT_Wunused_but_set_parameter,
15822 }
15824 /* Complain about locally defined typedefs that are not used in this
15825 function. */
15828 /* Possibly warn about unused parameters. */
15830 && !processing_template_decl
15834 /* Genericize before inlining. */
15836 {
15839 /* Clear out the bits we don't need. */
15849 }
15850 /* Clear out the bits we don't need. */
15853 /* We're leaving the context of this function, so zap cfun. It's still in
15854 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
15858 /* If this is an in-class inline definition, we may have to pop the
15859 bindings for the template parameters that we added in
15860 maybe_begin_member_template_processing when start_function was
15861 called. */
15865 /* Leave the scope of the class. */
15871 /* Clean up. */
15876 }
15877 \f
15878 /* Create the FUNCTION_DECL for a function definition.
15879 DECLSPECS and DECLARATOR are the parts of the declaration;
15880 they describe the return type and the name of the function,
15881 but twisted together in a fashion that parallels the syntax of C.
15883 This function creates a binding context for the function body
15884 as well as setting up the FUNCTION_DECL in current_function_decl.
15886 Returns a FUNCTION_DECL on success.
15888 If the DECLARATOR is not suitable for a function (it defines a datum
15889 instead), we return 0, which tells yyparse to report a parse error.
15891 May return void_type_node indicating that this method is actually
15892 a friend. See grokfield for more details.
15894 Came here with a `.pushlevel' .
15896 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
15897 CHANGES TO CODE IN `grokfield'. */
15899 tree
15902 {
15910 {
15913 }
15918 /* Pass friends other than inline friend functions back. */
15923 {
15928 }
15937 /* We process method specializations in finish_struct_1. */
15939 {
15943 }
15946 {
15948 {
15951 }
15952 }
15958 }
15959 \f
15961 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
15962 we can lay it out later, when and if its type becomes complete.
15964 Also handle constexpr variables where the initializer involves
15965 an unlowered PTRMEM_CST because the class isn't complete yet. */
15967 void
15969 {
15972 /* Keep track of variables with incomplete types. */
15975 {
15983 /* RTTI TD entries are created while defining the type_info. */
15986 {
15989 }
15993 {
15994 /* When the outermost open class is complete we can resolve any
15995 pointers-to-members. */
15999 }
16000 }
16001 }
16003 /* Called when a class type (given by TYPE) is defined. If there are
16004 any existing VAR_DECLs whose type has been completed by this
16005 declaration, update them now. */
16007 void
16009 {
16014 {
16016 {
16023 {
16024 /* Complete the type of the variable. The VAR_DECL itself
16025 will be laid out in expand_expr. */
16028 }
16030 /* Remove this entry from the list. */
16032 }
16033 else
16034 ix++;
16035 }
16037 /* Check for pending declarations which may have abstract type. */
16039 }
16041 /* If DECL is of a type which needs a cleanup, build and return an
16042 expression to perform that cleanup here. Return NULL_TREE if no
16043 cleanup need be done. DECL can also be a _REF when called from
16044 split_nonconstant_init_1. */
16046 tree
16048 {
16049 tree type;
16050 tree attr;
16051 tree cleanup;
16053 /* Assume no cleanup is required. */
16059 /* Handle "__attribute__((cleanup))". We run the cleanup function
16060 before the destructor since the destructor is what actually
16061 terminates the lifetime of the object. */
16064 else
16067 {
16068 tree id;
16069 tree fn;
16070 tree arg;
16072 /* Get the name specified by the user for the cleanup function. */
16074 /* Look up the name to find the cleanup function to call. It is
16075 important to use lookup_name here because that is what is
16076 used in c-common.c:handle_cleanup_attribute when performing
16077 initial checks on the attribute. Note that those checks
16078 include ensuring that the function found is not an overloaded
16079 function, or an object with an overloaded call operator,
16080 etc.; we can rely on the fact that the function found is an
16081 ordinary FUNCTION_DECL. */
16089 }
16090 /* Handle ordinary C++ destructors. */
16093 {
16095 tree addr;
16096 tree call;
16100 else
16111 else
16113 }
16115 /* build_delete sets the location of the destructor call to the
16116 current location, even though the destructor is going to be
16117 called later, at the end of the current scope. This can lead to
16118 a "jumpy" behavior for users of debuggers when they step around
16119 the end of the block. So let's unset the location of the
16120 destructor call instead. */
16126 /* Treat objects with destructors as used; the destructor may do
16127 something substantive. */
16132 }
16134 \f
16135 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
16136 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
16137 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
16139 tree
16141 {
16142 tree fntype;
16143 tree args;
16156 fntype = (cp_build_type_attribute_variant
16160 }
16162 /* DECL was originally constructed as a non-static member function,
16163 but turned out to be static. Update it accordingly. */
16165 void
16167 {
16180 }
16182 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
16183 one of the language-independent trees. */
16185 enum cp_tree_node_structure_enum
16187 {
16189 {
16206 }
16207 }
16209 /* Build the void_list_node (void_type_node having been created). */
16210 tree
16212 {
16215 }
16217 bool
16219 {
16220 /* A missing noreturn is ok for the `main' function. */
16222 }
16224 /* Return the decl used to identify the COMDAT group into which DECL should
16225 be placed. */
16227 tree
16229 {
16230 /* Virtual tables, construction virtual tables, and virtual table
16231 tables all go in a single COMDAT group, named after the primary
16232 virtual table. */
16235 /* For all other DECLs, the COMDAT group is the mangled name of the
16236 declaration itself. */
16237 else
16238 {
16240 {
16241 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
16242 into the same section as the target function. In that case
16243 we must return target's name. */
16249 else
16251 }
16252 }
16255 }
16257 /* Returns the return type for FN as written by the user, which may include
16258 a placeholder for a deduced return type. */
16260 tree
16262 {
16265 {
16272 }
16274 }
16276 /* Returns true iff DECL is a variable or function declared with an auto type
16277 that has not yet been deduced to a real type. */
16279 bool
16281 {
16287 }
16289 /* Complain if DECL has an undeduced return type. */
16291 bool
16293 {
16295 {
16299 }
16301 }