| blob | 93e24fc8984473b5ff6bd9988d729104658c613f |
1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2017 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. */
56 /* Possible cases of bad specifiers type used by bad_specifiers. */
61 BSP_FIELD /* field */
62 };
100 static tree check_special_function_return_type
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
111 C++ extensions
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
123 tree vtbl_type_node;
124 tree vtbl_ptr_type_node;
126 Namespaces,
128 tree std_node;
129 tree abi_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
135 tree abort_fndecl;
137 Used by RTTI
138 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
139 tree tinfo_var_id; */
143 #define local_names cp_function_chain->x_local_names
145 /* A list of objects which have constructors or destructors
146 which reside in the global scope. The decl is stored in
147 the TREE_VALUE slot and the initializer is stored
148 in the TREE_PURPOSE slot. */
149 tree static_aggregates;
151 /* Like static_aggregates, but for thread_local variables. */
152 tree tls_aggregates;
154 /* -- end of C++ */
156 /* A node for the integer constant 2. */
158 tree integer_two_node;
160 /* vector of static decls. */
163 /* vector of keyed classes. */
166 /* Used only for jumps to as-yet undefined labels, since jumps to
167 defined labels can have their validity checked immediately. */
171 /* The binding level to which this entry is *currently* attached.
172 This is initially the binding level in which the goto appeared,
173 but is modified as scopes are closed. */
175 /* The head of the names list that was current when the goto appeared,
176 or the inner scope popped. These are the decls that will *not* be
177 skipped when jumping to the label. */
178 tree names_in_scope;
179 /* The location of the goto, for error reporting. */
180 location_t o_goto_locus;
181 /* True if an OpenMP structured block scope has been closed since
182 the goto appeared. This means that the branch from the label will
183 illegally exit an OpenMP scope. */
185 };
187 /* A list of all LABEL_DECLs in the function that have names. Here so
188 we can clear out their names' definitions at the end of the
189 function, and so we can check the validity of jumps to these labels. */
192 /* The decl itself. */
193 tree label_decl;
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. */
199 /* The head of the names list that was current when the label was
200 defined, or the inner scope popped. These are the decls that will
201 be skipped when jumping to the label. */
202 tree names_in_scope;
203 /* A vector of all decls from all binding levels that would be
204 crossed by a backward branch to the label. */
207 /* A list of uses of the label, before the label is defined. */
210 /* The following bits are set after the label is defined, and are
211 updated as scopes are popped. They indicate that a backward jump
212 to the label will illegally enter a scope of the given flavor. */
218 };
220 #define named_labels cp_function_chain->x_named_labels
221 \f
222 /* The number of function bodies which we are currently processing.
223 (Zero if we are at namespace scope, one inside the body of a
224 function, two inside the body of a function in a local class, etc.) */
227 /* Whether the exception-specifier is part of a function type (i.e. C++17). */
230 /* States indicating how grokdeclarator() should handle declspecs marked
231 with __attribute__((deprecated)). An object declared as
232 __attribute__((deprecated)) suppresses warnings of uses of other
233 deprecated items. */
236 \f
237 /* A list of VAR_DECLs whose type was incomplete at the time the
238 variable was declared. */
241 tree decl;
242 tree incomplete_type;
243 };
247 \f
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
252 tmpl_spec_kind
254 {
260 /* Scan through the template parameter scopes. */
264 {
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
267 like:
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
275 {
278 else
280 }
285 }
287 /* Handle explicit instantiations. */
289 {
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
298 else
300 }
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' matches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
327 else
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
334 template. */
336 }
338 /* Exit the current scope. */
340 void
342 {
344 }
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
349 static void
351 {
353 {
355 {
356 location_t location;
360 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
361 /* Avoid crashing later. */
363 }
364 else
366 }
369 }
371 /* Push all named labels into a vector, so that we can sort it on DECL_UID
372 to avoid code generation differences. */
374 int
376 {
379 }
381 /* Helper function to sort named label entries in a vector by DECL_UID. */
383 static int
385 {
393 }
395 /* At the end of a function, all labels declared within the function
396 go out of scope. BLOCK is the top-level block for the
397 function. */
399 static void
401 {
403 {
408 /* Push all the labels into a vector and sort them by DECL_UID,
409 so that gaps between DECL_UIDs don't affect code generation. */
414 {
419 /* Put the labels into the "variables" of the top-level block,
420 so debugger can see them. */
425 }
427 }
428 }
430 /* At the end of a block with local labels, restore the outer definition. */
432 static void
434 {
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;
580 scope_kind kind;
585 restart:
598 /* We used to use KEEP == 2 to indicate that the new block should go
599 at the beginning of the list of blocks at this binding level,
600 rather than the end. This hack is no longer used. */
606 /* Any uses of undefined labels, and any defined labels, now operate
607 under constraints of next binding contour. */
612 /* Get the decls in the order they were written.
613 Usually current_binding_level->names is in reverse order.
614 But parameter decls were previously put in forward order. */
617 current_binding_level->names
619 else
622 /* If there were any declarations or structure tags in that level,
623 or if this level is a function body,
624 create a BLOCK to record them for the life of this function. */
626 /* Avoid function body block if possible. */
632 {
635 }
637 /* In each subblock, record that this is its superior. */
642 /* We still support the old for-scope rules, whereby the variables
643 in a init statement were in scope after the for-statement ended.
644 We only use the new rules if flag_new_for_scope is nonzero. */
645 leaving_for_scope
648 /* Before we remove the declarations first check for unused variables. */
653 {
654 /* There are cases where D itself is a TREE_LIST. See in
655 push_local_binding where the list of decls returned by
656 getdecls is built. */
663 /* For structured bindings, consider only real variables, not
664 subobjects. */
672 {
674 {
677 OPT_Wunused_variable,
679 else
682 }
684 // For -Wunused-but-set-variable leave references alone.
687 {
692 else
694 OPT_Wunused_but_set_variable,
697 }
698 }
699 }
701 /* Remove declarations for all the DECLs in this level. */
703 {
708 /* It's hard to make this ARM compatibility hack play nicely with
709 lambdas, and it really isn't necessary in C++11 mode. */
712 {
721 /* We have something like:
723 int i;
724 for (int i; ;);
726 and we are leaving the `for' scope. There's no reason to
727 keep the binding of the inner `i' in this case. */
728 ;
731 /* Here, we have something like:
733 typedef int I;
735 void f () {
736 for (int I; ;);
737 }
739 We must pop the for-scope binding so we know what's a
740 type and what isn't. */
741 ;
742 else
743 {
744 /* Mark this VAR_DECL as dead so that we can tell we left it
745 there only for backward compatibility. */
748 /* Keep track of what should have happened when we
749 popped the binding. */
751 {
754 }
756 /* Add it to the list of dead variables in the next
757 outermost binding to that we can remove these when we
758 leave that binding. */
761 link);
763 /* Although we don't pop the cxx_binding, we do clear
764 its SCOPE since the scope is going away now. */
768 /* Don't remove the binding. */
770 }
771 }
772 /* Remove the binding. */
774 }
776 /* Remove declarations for any `for' variables from inner scopes
777 that we kept around. */
782 /* Restore the IDENTIFIER_TYPE_VALUEs. */
787 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
792 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
793 list if a `using' declaration put them there. The debugging
794 back ends won't understand OVERLOAD, so we remove them here.
795 Because the BLOCK_VARS are (temporarily) shared with
796 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
797 popped all the bindings. Also remove undeduced 'auto' decls,
798 which LTO doesn't understand, and can't have been used by anything. */
800 {
804 {
806 || (!processing_template_decl
809 else
811 }
812 }
814 /* If the level being exited is the top level of a function,
815 check over all the labels. */
817 {
819 {
820 /* Since this is the top level block of a function, the vars are
821 the function's parameters. Don't leave them in the BLOCK
822 because they are found in the FUNCTION_DECL instead. */
825 }
826 else
828 }
832 {
833 tree stmt;
835 /* If this is a temporary binding created for a cleanup, then we'll
836 have pushed a statement list level. Pop that, create a new
837 BIND_EXPR for the block, and insert it into the stream. */
841 }
845 {
846 /* The current function is being defined, so its DECL_INITIAL
847 should be error_mark_node. */
851 {
853 {
856 }
857 else
859 }
860 }
862 current_binding_level->blocks
865 /* If we did not make a block for the level just exited,
866 any blocks made for inner levels
867 (since they cannot be recorded as subblocks in that level)
868 must be carried forward so they will later become subblocks
869 of something else. */
871 current_binding_level->blocks
874 /* Each and every BLOCK node created here in `poplevel' is important
875 (e.g. for proper debugging information) so if we created one
876 earlier, mark it as "used". */
880 /* All temporary bindings created for cleanups are popped silently. */
886 }
888 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
889 /* Diagnose odr-used extern inline variables without definitions
890 in the current TU. */
892 int
894 {
896 {
897 tree decl;
900 {
910 OPT_Wunused_function,
919 }
921 /* Clear out the list, so we don't rescan next time. */
924 /* Write out any globals that need to be output. */
927 }
929 }
930 \f
931 /* In C++, you don't have to write `struct S' to refer to `S'; you
932 can just use `S'. We accomplish this by creating a TYPE_DECL as
933 if the user had written `typedef struct S S'. Create and return
934 the TYPE_DECL for TYPE. */
936 tree
938 {
939 tree decl;
943 /* There are other implicit type declarations, like the one *within*
944 a class that allows you to write `S::S'. We must distinguish
945 amongst these. */
951 }
953 /* Remember a local name for name-mangling purposes. */
955 static void
957 {
967 {
970 {
975 else
981 }
982 }
986 }
987 \f
988 /* Subroutine of duplicate_decls: return truthvalue of whether
989 or not types of these decls match.
991 For C++, we must compare the parameter list so that `int' can match
992 `int&' in a parameter position, but `int&' is not confused with
993 `const int&'. */
995 int
997 {
1004 /* If the two DECLs are not even the same kind of thing, we're not
1005 interested in their types. */
1011 {
1016 tree r2;
1018 /* Specializations of different templates are different functions
1019 even if they have the same type. */
1034 /* A new declaration doesn't match a built-in one unless it
1035 is also extern "C". */
1043 /* A declaration with deduced return type should use its pre-deduction
1044 type for declaration matching. */
1048 {
1051 #ifndef NO_IMPLICIT_EXTERN_C
1054 #endif
1055 ))
1056 {
1060 }
1061 #ifndef NO_IMPLICIT_EXTERN_C
1069 {
1072 }
1073 #endif
1074 else
1075 types_match =
1081 }
1082 else
1085 /* The decls dont match if they correspond to two different versions
1086 of the same function. Disallow extern "C" functions to be
1087 versions for now. */
1092 {
1093 /* Mark functions as versions if necessary. Modify the mangled decl
1094 name if necessary. */
1099 {
1103 }
1105 {
1109 }
1112 }
1113 }
1115 {
1129 else
1130 // We don't need to check equivalently_constrained for variable and
1131 // function templates because we check it on the results.
1133 }
1134 else
1135 {
1136 /* Need to check scope for variable declaration (VAR_DECL).
1137 For typedef (TYPE_DECL), scope is ignored. */
1140 /* [dcl.link]
1141 Two declarations for an object with C language linkage
1142 with the same name (ignoring the namespace that qualify
1143 it) that appear in different namespace scopes refer to
1144 the same object. */
1154 else
1157 COMPARE_REDECLARATION);
1158 }
1160 // Normal functions can be constrained, as can variable partial
1161 // specializations.
1166 }
1168 /* If NEWDECL is `static' and an `extern' was seen previously,
1169 warn about it. OLDDECL is the previous declaration.
1171 Note that this does not apply to the C++ case of declaring
1172 a variable `extern const' and then later `const'.
1174 Don't complain about built-in functions, since they are beyond
1175 the user's control. */
1177 void
1179 {
1186 /* Don't get confused by static member functions; that's a different
1187 use of `static'. */
1192 /* If the old declaration was `static', or the new one isn't, then
1193 everything is OK. */
1197 /* It's OK to declare a builtin function as `static'. */
1206 }
1208 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1209 function templates. If their exception specifications do not
1210 match, issue a diagnostic. */
1212 static void
1214 tree old_decl)
1215 {
1219 /* Two default specs are equivalent, don't force evaluation. */
1229 /* [except.spec]
1231 If any declaration of a function has an exception-specification,
1232 all declarations, including the definition and an explicit
1233 specialization, of that function shall have an
1234 exception-specification with the same set of type-ids. */
1237 {
1245 /* We used to silently permit mismatched eh specs with
1246 -fno-exceptions, so make them a pedwarn now. */
1248 else
1253 }
1254 }
1256 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1257 Otherwise issue diagnostics. */
1259 static bool
1261 {
1271 {
1273 {
1274 /* Hide a built-in declaration. */
1278 }
1279 /* 7.1.5 [dcl.constexpr]
1280 Note: An explicit specialization can differ from the template
1281 declaration with respect to the constexpr specifier. */
1287 "redeclaration %qD differs in %<constexpr%> "
1292 }
1294 }
1296 // If OLDDECL and NEWDECL are concept declarations with the same type
1297 // (i.e., and template parameters), but different requirements,
1298 // emit diagnostics and return true. Otherwise, return false.
1301 {
1313 {
1318 {
1321 }
1322 }
1324 }
1326 /* DECL is a redeclaration of a function or function template. If
1327 it does have default arguments issue a diagnostic. Note: this
1328 function is used to enforce the requirements in C++11 8.3.6 about
1329 no default arguments in redeclarations. */
1331 static void
1333 {
1339 {
1341 "redeclaration of %q#D may not have default "
1344 }
1345 }
1347 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1349 DECL_ATTRIBUTES (fn)))
1351 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1352 If the redeclaration is invalid, a diagnostic is issued, and the
1353 error_mark_node is returned. Otherwise, OLDDECL is returned.
1355 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1356 returned.
1358 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1360 tree
1362 {
1366 tree new_template_info;
1373 /* If either the type of the new decl or the type of the old decl is an
1374 error_mark_node, then that implies that we have already issued an
1375 error (earlier) for some bogus type specification, and in that case,
1376 it is rather pointless to harass the user with yet more error message
1377 about the same declaration, so just pretend the types match here. */
1384 {
1395 }
1401 {
1405 else
1408 }
1410 /* Check for redeclaration and other discrepancies. */
1413 {
1416 {
1417 /* Avoid warnings redeclaring built-ins which have not been
1418 explicitly declared. */
1422 /* If you declare a built-in or predefined function name as static,
1423 the old definition is overridden, but optionally warn this was a
1424 bad choice of name. */
1426 {
1431 /* Discard the old built-in function. */
1433 }
1434 /* If the built-in is not ansi, then programs can override
1435 it even globally without an error. */
1440 else
1444 }
1446 {
1453 }
1455 {
1456 /* Avoid warnings redeclaring built-ins which have not been
1457 explicitly declared. */
1459 {
1462 /* A new declaration doesn't match a built-in one unless it
1463 is also extern "C". */
1473 {
1476 /* FILE, tm types are not known at the time
1477 we create the builtins. */
1483 {
1490 {
1498 newdecl_is_friend);
1500 }
1502 }
1506 next_arg:;
1507 }
1510 OPT_Wbuiltin_declaration_mismatch,
1511 "declaration of %q+#D conflicts with built-in "
1513 }
1518 {
1519 /* A near match; override the builtin. */
1523 OPT_Wbuiltin_declaration_mismatch,
1524 "new declaration %q#D ambiguates built-in "
1526 else
1531 }
1532 else
1533 /* Discard the old built-in function. */
1536 /* Replace the old RTL to avoid problems with inlining. */
1538 }
1539 /* Even if the types match, prefer the new declarations type for
1540 built-ins which have not been explicitly declared, for
1541 exception lists, etc... */
1543 {
1550 }
1552 /* If a function is explicitly declared "throw ()", propagate that to
1553 the corresponding builtin. */
1558 {
1563 }
1565 /* Whether or not the builtin can throw exceptions has no
1566 bearing on this declarator. */
1570 {
1571 /* If a builtin function is redeclared as `static', merge
1572 the declarations, but make the original one static. */
1576 /* Make the old declaration consistent with the new one so
1577 that all remnants of the builtin-ness of this function
1578 will be banished. */
1581 }
1582 }
1584 {
1585 /* C++ Standard, 3.3, clause 4:
1586 "[Note: a namespace name or a class template name must be unique
1587 in its declarative region (7.3.2, clause 14). ]" */
1594 {
1599 {
1600 /* We do nothing special here, because C++ does such nasty
1601 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1602 get shadowed, and know that if we need to find a TYPE_DECL
1603 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1604 slot of the identifier. */
1606 }
1613 }
1622 }
1624 {
1626 /* These are certainly not duplicate declarations; they're
1627 from different scopes. */
1631 {
1632 /* The name of a class template may not be declared to refer to
1633 any other template, class, function, object, namespace, value,
1634 or type in the same scope. */
1637 {
1642 }
1649 /* Template functions can be disambiguated by
1650 return type. */
1653 // Template functions can also be disambiguated by
1654 // constraints.
1656 {
1660 }
1664 }
1666 {
1668 {
1670 newdecl);
1674 }
1675 /* For function versions, params and types match, but they
1676 are not ambiguous. */
1679 // The functions have the same parameter types.
1682 // And the same constraints.
1684 {
1689 }
1690 else
1692 }
1693 else
1694 {
1699 }
1700 }
1710 /* It's OK to have a template specialization and a non-template
1711 with the same type, or to have specializations of two
1712 different templates with the same type. Note that if one is a
1713 specialization, and the other is an instantiation of the same
1714 template, that we do not exit at this point. That situation
1715 can occur if we instantiate a template class, and then
1716 specialize one of its methods. This situation is valid, but
1717 the declarations must be merged in the usual way. */
1724 /* One of the declarations is a template instantiation, and the
1725 other is not a template at all. That's OK. */
1728 {
1729 /* In [namespace.alias] we have:
1731 In a declarative region, a namespace-alias-definition can be
1732 used to redefine a namespace-alias declared in that declarative
1733 region to refer only to the namespace to which it already
1734 refers.
1736 Therefore, if we encounter a second alias directive for the same
1737 alias, we can just ignore the second directive. */
1743 /* Leave it to update_binding to merge or report error. */
1745 }
1746 else
1747 {
1750 {
1758 }
1763 {
1764 /* Prototype decl follows defn w/o prototype. */
1769 }
1772 {
1773 /* [dcl.link]
1774 If two declarations of the same function or object
1775 specify different linkage-specifications ..., the program
1776 is ill-formed.... Except for functions with C++ linkage,
1777 a function declaration without a linkage specification
1778 shall not precede the first linkage specification for
1779 that function. A function can be declared without a
1780 linkage specification after an explicit linkage
1781 specification has been seen; the linkage explicitly
1782 specified in the earlier declaration is not affected by
1783 such a function declaration.
1785 DR 563 raises the question why the restrictions on
1786 functions should not also apply to objects. Older
1787 versions of G++ silently ignore the linkage-specification
1788 for this example:
1790 namespace N {
1791 extern int i;
1792 extern "C" int i;
1793 }
1795 which is clearly wrong. Therefore, we now treat objects
1796 like functions. */
1798 {
1799 /* There is no explicit linkage-specification, so we use
1800 the linkage from the previous declaration. */
1803 }
1804 else
1805 {
1811 }
1812 }
1815 ;
1817 {
1818 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1821 as FUNCTION_DECLs. */
1823 /* C++11 8.3.6/6.
1824 Default arguments for a member function of a class
1825 template shall be specified on the initial declaration
1826 of the member function within the class template. */
1829 else
1830 {
1838 {
1841 {
1843 "default argument given for parameter "
1847 olddecl);
1848 }
1849 else
1850 {
1855 olddecl);
1856 }
1857 }
1858 }
1859 }
1860 }
1862 /* Do not merge an implicit typedef with an explicit one. In:
1864 class A;
1865 ...
1866 typedef class A A __attribute__ ((foo));
1868 the attribute should apply only to the typedef. */
1874 /* If new decl is `static' and an `extern' was seen previously,
1875 warn about it. */
1881 /* We have committed to returning 1 at this point. */
1883 {
1884 /* Now that functions must hold information normally held
1885 by field decls, there is extra work to do so that
1886 declaration information does not get destroyed during
1887 definition. */
1901 SET_OVERLOADED_OPERATOR_CODE
1905 /* Optionally warn about more than one declaration for the same
1906 name, but don't warn about a function declaration followed by a
1907 definition. */
1910 /* Don't warn about extern decl followed by definition. */
1912 /* Don't warn about friends, let add_friend take care of it. */
1914 /* Don't warn about declaration followed by specialization. */
1917 {
1919 OPT_Wredundant_decls,
1921 newdecl))
1924 }
1928 {
1930 {
1934 }
1936 }
1937 }
1939 /* Deal with C++: must preserve virtual function table size. */
1941 {
1951 }
1953 /* Copy all the DECL_... slots specified in the new decl
1954 except for any that we copy here from the old type. */
1959 {
1965 {
1968 }
1969 }
1972 {
1973 tree old_result;
1974 tree new_result;
1986 {
1987 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1988 declarations of a function template. */
1997 {
2000 else
2012 }
2013 else
2014 {
2020 }
2021 }
2023 /* If the new declaration is a definition, update the file and
2024 line information on the declaration, and also make
2025 the old declaration the same definition. */
2027 {
2033 {
2034 tree parm;
2040 }
2041 }
2044 }
2047 {
2051 /* Automatically handles default parameters. */
2053 tree newtype;
2055 /* For typedefs use the old type, as the new type's DECL_NAME points
2056 at newdecl, which will be ggc_freed. */
2058 {
2059 /* But NEWTYPE might have an attribute, honor that. */
2064 {
2068 }
2070 /* And remove the new type from the variants list. */
2072 {
2077 {
2080 }
2081 }
2082 }
2083 else
2084 /* Merge the data types specified in the two decls. */
2088 {
2090 /* For already initialized vars, TREE_READONLY could have been
2091 cleared in cp_finish_decl, because the var needs runtime
2092 initialization or destruction. Make sure not to set
2093 TREE_READONLY on it again. */
2107 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2110 {
2111 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2114 }
2115 }
2117 /* An explicit specialization of a function template or of a member
2118 function of a class template can be declared transaction_safe
2119 independently of whether the corresponding template entity is declared
2120 transaction_safe. */
2133 /* Lay the type out, unless already done. */
2147 /* Merge the type qualifiers. */
2155 /* Merge deprecatedness. */
2159 /* Preserve function specific target and optimization options */
2161 {
2171 }
2173 /* Merge the initialization information. */
2176 {
2180 {
2183 }
2184 }
2187 {
2199 /* Keep the old RTL. */
2201 }
2204 {
2205 /* Keep the old RTL. We cannot keep the old RTL if the old
2206 declaration was for an incomplete object and the new
2207 declaration is not since many attributes of the RTL will
2208 change. */
2210 }
2211 }
2212 /* If cannot merge, then use the new type and qualifiers,
2213 and don't preserve the old rtl. */
2214 else
2215 {
2216 /* Clean out any memory we had of the old declaration. */
2226 }
2228 /* Merge the storage class information. */
2241 {
2250 {
2257 }
2260 {
2264 }
2269 /* If the OLDDECL is an instantiation and/or specialization,
2270 then the NEWDECL must be too. But, it may not yet be marked
2271 as such if the caller has created NEWDECL, but has not yet
2272 figured out that it is a redeclaration. */
2276 /* Don't really know how much of the language-specific
2277 values we should copy from old to new. */
2284 {
2288 {
2292 /* Remember the presence of explicit specialization args. */
2295 }
2297 }
2298 /* Only functions have these fields. */
2300 {
2305 /* DECL_THUNKS is only valid for virtual functions,
2306 otherwise it is a DECL_FRIEND_CONTEXT. */
2309 }
2310 /* Only variables have this field. */
2314 }
2317 {
2318 tree parm;
2320 /* Merge parameter attributes. */
2329 }
2333 {
2334 /* If newdecl is not a specialization, then it is not a
2335 template-related function at all. And that means that we
2336 should have exited above, returning 0. */
2340 /* From [temp.expl.spec]:
2342 If a template, a member template or the member of a class
2343 template is explicitly specialized then that
2344 specialization shall be declared before the first use of
2345 that specialization that would cause an implicit
2346 instantiation to take place, in every translation unit in
2347 which such a use occurs. */
2349 olddecl);
2355 /* Don't propagate visibility from the template to the
2356 specialization here. We'll do that in determine_visibility if
2357 appropriate. */
2360 /* [temp.expl.spec/14] We don't inline explicit specialization
2361 just because the primary template says so. */
2363 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2364 the always_inline attribute. */
2367 {
2370 else
2374 }
2375 }
2377 {
2378 /* Never inline re-defined extern inline functions.
2379 FIXME: this could be better handled by keeping both
2380 function as separate declarations. */
2382 }
2383 else
2384 {
2386 {
2390 }
2392 ;
2406 }
2408 /* Preserve abstractness on cloned [cd]tors. */
2411 /* Update newdecl's parms to point at olddecl. */
2417 {
2421 }
2423 {
2424 /* These need to be copied so that the names are available.
2425 Note that if the types do match, we'll preserve inline
2426 info and other bits, but if not, we won't. */
2429 }
2430 /* If redeclaring a builtin function, it stays built in
2431 if newdecl is a gnu_inline definition, or if newdecl is just
2432 a declaration. */
2435 {
2438 /* If we're keeping the built-in definition, keep the rtl,
2439 regardless of declaration matches. */
2442 {
2445 {
2446 /* If a compatible prototype of these builtin functions
2447 is seen, assume the runtime implements it with the
2448 expected semantics. */
2457 }
2458 }
2459 }
2461 /* If defining a function declared with other language
2462 linkage, use the previously declared language linkage. */
2465 {
2467 /* Don't clear out the arguments if we're just redeclaring a
2468 function. */
2471 }
2472 }
2476 /* Now preserve various other info from the definition. */
2482 /* Warn about conflicting visibility specifications. */
2486 {
2488 "%qD: visibility attribute ignored because it "
2492 }
2493 /* Choose the declaration which specified visibility. */
2495 {
2498 }
2499 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2500 so keep this behavior. */
2502 {
2505 }
2506 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2508 {
2511 }
2516 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2517 with that from NEWDECL below. */
2519 {
2523 }
2525 /* Merge the USED information. */
2531 {
2536 }
2542 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2543 to olddecl and deleted. */
2546 {
2547 /* Set the flag for newdecl so that it gets copied to olddecl. */
2549 /* newdecl will be purged after copying to olddecl and is no longer
2550 a version. */
2552 }
2555 {
2569 /* Preserve symtab node mapping. */
2573 /* If newdecl is a template instantiation, it is possible that
2574 the following sequence of events has occurred:
2576 o A friend function was declared in a class template. The
2577 class template was instantiated.
2579 o The instantiation of the friend declaration was
2580 recorded on the instantiation list, and is newdecl.
2582 o Later, however, instantiate_class_template called pushdecl
2583 on the newdecl to perform name injection. But, pushdecl in
2584 turn called duplicate_decls when it discovered that another
2585 declaration of a global function with the same name already
2586 existed.
2588 o Here, in duplicate_decls, we decided to clobber newdecl.
2590 If we're going to do that, we'd better make sure that
2591 olddecl, and not newdecl, is on the list of
2592 instantiations so that if we try to do the instantiation
2593 again we won't get the clobbered declaration. */
2595 new_template_info,
2596 olddecl);
2597 }
2598 else
2599 {
2606 {
2614 {
2627 }
2635 }
2636 }
2639 {
2643 {
2644 /* Merge the section attribute.
2645 We want to issue an error if the sections conflict but that must be
2646 done later in decl_attributes since we are called before attributes
2647 are assigned. */
2652 {
2656 else
2660 }
2661 }
2665 {
2669 }
2670 }
2676 {
2679 }
2681 /* NEWDECL contains the merged attribute lists.
2682 Update OLDDECL to be the same. */
2685 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2686 so that encode_section_info has a chance to look at the new decl
2687 flags and attributes. */
2694 /* The NEWDECL will no longer be needed. Because every out-of-class
2695 declaration of a member results in a call to duplicate_decls,
2696 freeing these nodes represents in a significant savings.
2698 Before releasing the node, be sore to remove function from symbol
2699 table that might have been inserted there to record comdat group.
2700 Be sure to however do not free DECL_STRUCT_FUNCTION because this
2701 structure is shared in between newdecl and oldecl. */
2705 {
2709 }
2711 /* Remove the associated constraints for newdecl, if any, before
2712 reclaiming memory. */
2719 }
2720 \f
2721 /* Return zero if the declaration NEWDECL is valid
2722 when the declaration OLDDECL (assumed to be for the same name)
2723 has already been seen.
2724 Otherwise return an error message format string with a %s
2725 where the identifier should go. */
2729 {
2731 {
2732 /* Because C++ can put things into name space for free,
2733 constructs like "typedef struct foo { ... } foo"
2734 would look like an erroneous redeclaration. */
2737 else
2739 }
2741 {
2742 /* If this is a pure function, its olddecl will actually be
2743 the original initialization to `0' (which we force to call
2744 abort()). Don't complain about redefinition in this case. */
2749 /* If both functions come from different namespaces, this is not
2750 a redeclaration - this is a conflict with a used function. */
2756 /* We'll complain about linkage mismatches in
2757 warn_extern_redeclared_static. */
2759 /* Defining the same name twice is no good. */
2762 {
2768 }
2771 {
2776 {
2780 else
2783 }
2784 }
2786 check_abi_tag_redeclaration
2791 }
2793 {
2797 {
2802 }
2820 {
2825 {
2829 else
2832 }
2833 }
2835 /* Core issue #226 (C++0x):
2837 If a friend function template declaration specifies a
2838 default template-argument, that declaration shall be a
2839 definition and shall be the only declaration of the
2840 function template in the translation unit. */
2851 }
2857 {
2858 /* Only variables can be thread-local, and all declarations must
2859 agree on this property. */
2863 else
2866 }
2868 {
2869 /* The objects have been declared at namespace scope. If either
2870 is a member of an anonymous union, then this is an invalid
2871 redeclaration. For example:
2873 int i;
2874 union { int i; };
2876 is invalid. */
2880 /* If at least one declaration is a reference, there is no
2881 conflict. For example:
2883 int i = 3;
2884 extern int i;
2886 is valid. */
2890 /* Static data member declared outside a class definition
2891 if the variable is defined within the class with constexpr
2892 specifier is declaration rather than definition (and
2893 deprecated). */
2898 {
2900 /* For now, only warn with explicit -Wdeprecated. */
2903 "redundant redeclaration of %<constexpr%> static "
2908 }
2910 /* Reject two definitions. */
2912 }
2913 else
2914 {
2915 /* Objects declared with block scope: */
2916 /* Reject two definitions, and reject a definition
2917 together with an external reference. */
2921 }
2922 }
2923 \f
2924 /* Hash and equality functions for the named_label table. */
2926 hashval_t
2928 {
2930 }
2932 bool
2934 {
2936 }
2938 /* Create a new label, named ID. */
2940 static tree
2942 {
2944 tree decl;
2952 /* Say where one reference is to the label, for the sake of the
2953 error if it is not defined. */
2956 /* Record the fact that this identifier is bound to this label. */
2959 /* Create the label htab for the function on demand. */
2963 /* Record this label on the list of labels used in this function.
2964 We do this before calling make_label_decl so that we get the
2965 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2974 }
2976 /* Look for a label named ID in the current function. If one cannot
2977 be found, create one. (We keep track of used, but undefined,
2978 labels, and complain about them at the end of a function.) */
2980 static tree
2982 {
2983 tree decl;
2985 /* You can't use labels at global scope. */
2987 {
2990 }
2992 /* See if we've already got this label. */
2999 }
3001 /* Wrapper for lookup_label_1. */
3003 tree
3005 {
3006 tree ret;
3011 }
3013 /* Declare a local label named ID. */
3015 tree
3017 {
3018 tree decl;
3019 cp_label_binding bind;
3021 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
3022 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
3030 }
3032 /* Returns nonzero if it is ill-formed to jump past the declaration of
3033 DECL. Returns 2 if it's also a real problem. */
3035 static int
3037 {
3038 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
3039 with automatic storage duration is not in scope to a point where it is
3040 in scope is ill-formed unless the variable has scalar type, class type
3041 with a trivial default constructor and a trivial destructor, a
3042 cv-qualified version of one of these types, or an array of one of the
3043 preceding types and is declared without an initializer (8.5). */
3058 }
3060 /* A subroutine of check_previous_goto_1 and check_goto to identify a branch
3061 to the user. */
3063 static bool
3065 diagnostic_t diag_kind)
3066 {
3067 bool complained
3073 }
3075 /* Check that a single previously seen jump to a newly defined label
3076 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
3077 the jump context; NAMES are the names in scope in LEVEL at the jump
3078 context; LOCUS is the source position of the jump or 0. Returns
3079 true if all is well. */
3081 static bool
3084 {
3091 {
3097 }
3100 {
3106 {
3112 {
3114 DK_PERMERROR);
3116 }
3118 {
3122 else
3124 " enters scope of %q#D which has "
3126 }
3127 }
3132 {
3134 {
3136 DK_ERROR);
3138 }
3140 {
3143 else
3145 }
3147 }
3149 {
3151 {
3153 DK_ERROR);
3155 }
3159 }
3161 {
3163 {
3165 DK_ERROR);
3167 }
3172 }
3175 {
3177 {
3179 DK_ERROR);
3181 }
3186 }
3187 }
3190 }
3192 static void
3194 {
3198 }
3200 static bool
3202 {
3204 }
3206 /* Check that a new jump to a label DECL is OK. Called by
3207 finish_goto_stmt. */
3209 void
3211 {
3215 tree bad;
3218 /* We can't know where a computed goto is jumping.
3219 So we assume that it's OK. */
3223 /* We didn't record any information about this label when we created it,
3224 and there's not much point since it's trivial to analyze as a return. */
3232 /* If the label hasn't been defined yet, defer checking. */
3234 {
3237 /* Don't bother creating another use if the last goto had the
3238 same data, and will therefore create the same set of errors. */
3252 }
3257 {
3265 }
3268 {
3272 {
3273 /* Can't skip init of __exception_info. */
3275 {
3279 }
3283 }
3285 {
3289 else
3291 " enters scope of %q#D which has "
3293 }
3294 }
3297 {
3306 }
3309 {
3312 }
3314 {
3317 {
3321 {
3323 {
3328 }
3332 }
3333 }
3334 }
3335 }
3337 /* Check that a return is ok wrt OpenMP structured blocks.
3338 Called by finish_return_stmt. Returns true if all is well. */
3340 bool
3342 {
3346 {
3349 }
3353 }
3355 /* Define a label, specifying the location in the source file.
3356 Return the LABEL_DECL node for the label. */
3358 static tree
3360 {
3363 tree decl;
3371 /* After labels, make any new cleanups in the function go into their
3372 own new (temporary) binding contour. */
3382 {
3385 }
3386 else
3387 {
3390 /* Mark label as having been defined. */
3392 /* Say where in the source. */
3401 }
3404 }
3406 /* Wrapper for define_label_1. */
3408 tree
3410 {
3411 tree ret;
3416 }
3419 struct cp_switch
3420 {
3423 /* The SWITCH_STMT being built. */
3424 tree switch_stmt;
3425 /* A splay-tree mapping the low element of a case range to the high
3426 element, or NULL_TREE if there is no high element. Used to
3427 determine whether or not a new case label duplicates an old case
3428 label. We need a tree, rather than simply a hash table, because
3429 of the GNU case range extension. */
3430 splay_tree cases;
3431 /* Remember whether there was a case value that is outside the
3432 range of the original type of the controlling expression. */
3434 };
3436 /* A stack of the currently active switch statements. The innermost
3437 switch statement is on the top of the stack. There is no need to
3438 mark the stack for garbage collection because it is only active
3439 during the processing of the body of a function, and we never
3440 collect at that point. */
3444 /* Called right after a switch-statement condition is parsed.
3445 SWITCH_STMT is the switch statement being parsed. */
3447 void
3449 {
3457 }
3459 void
3461 {
3463 location_t switch_location;
3465 /* Emit warnings as needed. */
3467 const bool bool_cond_p
3479 }
3481 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3482 condition. Note that if TYPE and VALUE are already integral we don't
3483 really do the conversion because the language-independent
3484 warning/optimization code will work better that way. */
3486 static tree
3488 {
3495 {
3498 value = (perform_implicit_conversion_flags
3501 }
3503 }
3505 /* Note that we've seen a definition of a case label, and complain if this
3506 is a bad place for one. */
3508 tree
3510 {
3513 tree type;
3516 {
3517 tree label;
3519 /* For templates, just add the case label; we'll do semantic
3520 analysis at instantiation-time. */
3523 }
3525 /* Find the condition on which this switch statement depends. */
3542 /* After labels, make any new cleanups in the function go into their
3543 own new (temporary) binding contour. */
3550 }
3551 \f
3553 tree scope;
3554 tree name;
3555 tree template_id;
3558 };
3561 {
3564 /* Hash a TYPENAME_TYPE. */
3566 static hashval_t
3568 {
3569 hashval_t hash;
3575 }
3577 /* Compare two TYPENAME_TYPEs. */
3579 static bool
3581 {
3587 }
3588 };
3590 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3591 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3593 Returns the new TYPENAME_TYPE. */
3597 static tree
3600 {
3601 tree t;
3602 tree d;
3603 typename_info ti;
3605 hashval_t hash;
3620 /* See if we already have this type. */
3624 else
3625 {
3626 /* Build the TYPENAME_TYPE. */
3633 /* Build the corresponding TYPE_DECL. */
3640 /* Store it in the hash table. */
3643 /* TYPENAME_TYPEs must always be compared structurally, because
3644 they may or may not resolve down to another type depending on
3645 the currently open classes. */
3647 }
3650 }
3652 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3653 provided to name the type. Returns an appropriate type, unless an
3654 error occurs, in which case error_mark_node is returned. If we
3655 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3656 return that, rather than the _TYPE it corresponds to, in other
3657 cases we look through the type decl. If TF_ERROR is set, complain
3658 about errors, otherwise be quiet. */
3660 tree
3662 tsubst_flags_t complain)
3663 {
3664 tree fullname;
3665 tree t;
3674 {
3679 else
3680 /* Create a TEMPLATE_ID_EXPR for the type. */
3684 }
3691 {
3696 {
3700 }
3701 }
3703 {
3707 }
3712 {
3716 }
3718 /* When the CONTEXT is a dependent type, NAME could refer to a
3719 dependent base class of CONTEXT. But look inside it anyway
3720 if CONTEXT is a currently open scope, in case it refers to a
3721 member of the current instantiation or a non-dependent base;
3722 lookup will stop when we hit a dependent base. */
3724 /* We should only set WANT_TYPE when we're a nested typename type.
3725 Then we can give better diagnostics if we find a non-type. */
3727 else
3736 {
3738 {
3741 else
3744 }
3746 }
3748 /* Pull out the template from an injected-class-name (or multiple). */
3753 {
3755 {
3758 }
3760 }
3763 {
3768 }
3770 {
3775 }
3780 /* If we are currently parsing a template and if T is a typedef accessed
3781 through CONTEXT then we need to remember and check access of T at
3782 template instantiation time. */
3797 }
3799 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3800 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3801 in which case error_mark_node is returned.
3803 If PARM_LIST is non-NULL, also make sure that the template parameter
3804 list of TEMPLATE_DECL matches.
3806 If COMPLAIN zero, don't complain about any errors that occur. */
3808 tree
3810 tsubst_flags_t complain)
3811 {
3812 tree t;
3813 tree d;
3823 {
3833 {
3837 }
3841 {
3843 {
3847 }
3849 }
3852 complain))
3856 }
3858 /* Build the UNBOUND_CLASS_TEMPLATE. */
3864 /* Build the corresponding TEMPLATE_DECL. */
3873 }
3875 \f
3877 /* Push the declarations of builtin types into the global namespace.
3878 RID_INDEX is the index of the builtin type in the array
3879 RID_POINTERS. NAME is the name used when looking up the builtin
3880 type. TYPE is the _TYPE node for the builtin type. */
3882 void
3885 tree type)
3886 {
3895 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3896 eliminated. Built-in types should not be looked up name; their
3897 names are keywords that the parser can recognize. However, there
3898 is code in c-common.c that uses identifier_global_value to look
3899 up built-in types by name. */
3901 {
3905 }
3907 {
3909 {
3912 }
3914 }
3921 }
3923 /* Push a type into the namespace so that the back ends ignore it. */
3925 static void
3927 {
3930 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3937 }
3939 /* Create all the predefined identifiers. */
3941 static void
3943 {
3944 struct predefined_identifier
3945 {
3949 };
3951 /* A table of identifiers to create at startup. */
3955 /* Some of these names have a trailing space so that it is
3956 impossible for them to conflict with names written by users. */
3972 /* The demangler expects anonymous namespaces to be called
3973 something starting with '_GLOBAL__N_'. It no longer needs
3974 to be unique to the TU. */
3980 };
3984 {
3986 /* Some of these identifiers already have a special kind. */
3989 }
3990 }
3992 /* Create the predefined scalar types of C,
3993 and some nodes representing standard constants (0, 1, (void *)0).
3994 Initialize the global binding level.
3995 Make definitions for built-in primitive functions. */
3997 void
3999 {
4000 tree void_ftype;
4001 tree void_ftype_ptr;
4003 /* Create all the identifiers we need. */
4006 /* Create the global variables. */
4011 /* Enter the global namespace. */
4014 void_type_node);
4018 debug_hooks->register_main_translation_unit
4026 /* Initially, C. */
4029 /* Create the `std' namespace. */
4040 /* Guess at the initial static decls size. */
4043 /* ... and keyed classes. */
4055 NULL_TREE);
4057 #if 0
4059 #endif
4068 void_ftype_ptr
4071 /* C++ extensions */
4076 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
4079 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
4080 result. */
4087 {
4088 /* Make sure we get a unique function type, so we can give
4089 its pointer type a name. (This wins for gdb.) */
4096 }
4099 vtbl_type_node
4118 /* Now, C++. */
4123 {
4126 }
4132 {
4135 tree ptr_ftype_sizetype;
4136 tree new_eh_spec;
4138 ptr_ftype_sizetype
4141 {
4142 tree bad_alloc_id;
4143 tree bad_alloc_type_node;
4144 tree bad_alloc_decl;
4150 bad_alloc_decl
4155 new_eh_spec
4157 }
4158 else
4161 /* Ensure attribs.c is initialized. */
4164 /* Ensure constraint.cc is initialized. */
4168 NULL_TREE);
4171 extvisattr);
4185 {
4186 /* Also push the sized deallocation variants:
4187 void operator delete(void*, std::size_t) throw();
4188 void operator delete[](void*, std::size_t) throw(); */
4189 tree void_ftype_ptr_size
4193 extvisattr);
4197 }
4200 {
4207 /* operator new (size_t, align_val_t); */
4219 /* operator delete (void *, align_val_t); */
4228 {
4229 /* operator delete (void *, size_t, align_val_t); */
4232 NULL_TREE);
4237 }
4238 }
4250 }
4252 abort_fndecl
4256 /* Perform other language dependent initializations. */
4270 /* Show we use EH for cleanups. */
4273 }
4275 /* Generate an initializer for a function naming variable from
4276 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4277 filled in with the type of the init. */
4279 tree
4281 {
4283 tree type;
4288 {
4292 }
4301 else
4305 }
4307 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4308 the decl, LOC is the location to give the decl, NAME is the
4309 initialization string and TYPE_DEP indicates whether NAME depended
4310 on the type of the function. We make use of that to detect
4311 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4312 at the point of first use, so we mustn't push the decl now. */
4314 static tree
4316 {
4319 tree type;
4333 {
4337 LOOKUP_ONLYCONVERTING);
4338 }
4339 else
4340 {
4343 }
4346 }
4348 static tree
4350 {
4359 /* Runtime library routines are, by definition, available in an
4360 external shared object. */
4366 /* A function in the user's namespace should have an explicit
4367 declaration before it is used. Mark the built-in function as
4368 anticipated but not actually declared. */
4372 {
4375 /* Treat __*_chk fortification functions as anticipated as well,
4376 unless they are __builtin_*. */
4381 }
4385 else
4389 }
4391 tree
4393 {
4396 /* All builtins that don't begin with an '_' should additionally
4397 go in the 'std' namespace. */
4399 {
4404 }
4407 }
4409 /* Like cxx_builtin_function, but guarantee the function is added to the global
4410 scope. This is to allow function specific options to add new machine
4411 dependent builtins when the target ISA changes via attribute((target(...)))
4412 which saves space on program startup if the program does not use non-generic
4413 ISAs. */
4415 tree
4417 {
4421 /* All builtins that don't begin with an '_' should additionally
4422 go in the 'std' namespace. */
4424 {
4429 }
4432 }
4434 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4435 function. Not called directly. */
4437 static tree
4440 {
4447 /* Runtime library routines are, by definition, available in an
4448 external shared object. */
4453 }
4455 /* Returns the _DECL for a library function with C++ linkage. */
4457 static tree
4460 {
4465 }
4467 /* Like build_library_fn, but takes a C string instead of an
4468 IDENTIFIER_NODE. */
4470 tree
4472 {
4474 }
4476 /* Like build_cp_library_fn, but takes a C string instead of an
4477 IDENTIFIER_NODE. */
4479 tree
4481 {
4483 ecf_flags);
4484 }
4486 /* Like build_library_fn, but also pushes the function so that we will
4487 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4488 may throw exceptions listed in RAISES. */
4490 tree
4492 {
4493 tree fn;
4501 }
4503 /* Like build_cp_library_fn, but also pushes the function so that it
4504 will be found by normal lookup. */
4506 static tree
4509 {
4511 operator_code,
4517 }
4519 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4520 a FUNCTION_TYPE. */
4522 tree
4524 {
4527 }
4529 /* Like push_library_fn, but also note that this function throws
4530 and does not return. Used for __throw_foo and the like. */
4532 tree
4534 {
4537 }
4538 \f
4539 /* When we call finish_struct for an anonymous union, we create
4540 default copy constructors and such. But, an anonymous union
4541 shouldn't have such things; this function undoes the damage to the
4542 anonymous union type T.
4544 (The reason that we create the synthesized methods is that we don't
4545 distinguish `union { int i; }' from `typedef union { int i; } U'.
4546 The first is an anonymous union; the second is just an ordinary
4547 union type.) */
4549 void
4551 {
4554 /* Wipe out memory of synthesized methods. */
4562 /* Splice the implicitly generated functions out of the TYPE_METHODS
4563 list. */
4566 {
4569 else
4571 }
4573 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4575 {
4581 else
4584 }
4586 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4587 assignment operators (because they cannot have these methods themselves).
4588 For anonymous unions this is already checked because they are not allowed
4589 in any union, otherwise we have to check it. */
4591 {
4596 {
4599 {
4609 }
4610 }
4611 }
4612 }
4614 /* Warn for an attribute located at LOCATION that appertains to the
4615 class type CLASS_TYPE that has not been properly placed after its
4616 class-key, in it class-specifier. */
4618 void
4620 tree class_type)
4621 {
4625 "attribute ignored in declaration "
4630 }
4632 /* Make sure that a declaration with no declarator is well-formed, i.e.
4633 just declares a tagged type or anonymous union.
4635 Returns the type declared; or NULL_TREE if none. */
4637 tree
4640 {
4643 /* If a class, struct, or enum type is declared by the DECLSPECS
4644 (i.e, if a class-specifier, enum-specifier, or non-typename
4645 elaborated-type-specifier appears in the DECLSPECS),
4646 DECLARED_TYPE is set to the corresponding type. */
4653 {
4659 }
4672 {
4674 "%<auto%> can only be specified for variables "
4677 }
4678 /* Check for an anonymous union. */
4681 {
4682 /* 7/3 In a simple-declaration, the optional init-declarator-list
4683 can be omitted only when declaring a class (clause 9) or
4684 enumeration (7.2), that is, when the decl-specifier-seq contains
4685 either a class-specifier, an elaborated-type-specifier with
4686 a class-key (9.1), or an enum-specifier. In these cases and
4687 whenever a class-specifier or enum-specifier is present in the
4688 decl-specifier-seq, the identifiers in these specifiers are among
4689 the names being declared by the declaration (as class-name,
4690 enum-names, or enumerators, depending on the syntax). In such
4691 cases, and except for the declaration of an unnamed bit-field (9.6),
4692 the decl-specifier-seq shall introduce one or more names into the
4693 program, or shall redeclare a name introduced by a previous
4694 declaration. [Example:
4695 enum { }; // ill-formed
4696 typedef class { }; // ill-formed
4697 --end example] */
4699 {
4702 }
4709 }
4711 else
4712 {
4720 && (!current_class_type
4729 "a storage class can only be specified for objects "
4733 "%<const%> can only be specified for objects and "
4737 "%<volatile%> can only be specified for objects and "
4741 "%<__restrict%> can only be specified for objects and "
4745 "%<__thread%> can only be specified for objects "
4753 }
4756 {
4757 location_t loc;
4760 /* For a non-template class, use the name location. */
4762 else
4763 /* For a template class (an explicit instantiation), use the
4764 current location. */
4768 /* [dcl.attr.grammar]/4:
4770 No attribute-specifier-seq shall appertain to an explicit
4771 instantiation. */
4772 {
4775 declared_type))
4777 "no attribute can be applied to "
4779 }
4780 else
4782 }
4785 }
4787 /* Called when a declaration is seen that contains no names to declare.
4788 If its type is a reference to a structure, union or enum inherited
4789 from a containing scope, shadow that tag name for the current scope
4790 with a forward reference.
4791 If its type defines a new named structure or union
4792 or defines an enum, it is valid but we need not do anything here.
4793 Otherwise, it is an error.
4795 C++: may have to grok the declspecs to learn about static,
4796 complain for anonymous unions.
4798 Returns the TYPE declared -- or NULL_TREE if none. */
4800 tree
4802 {
4812 /* This is where the variables in an anonymous union are
4813 declared. An anonymous union declaration looks like:
4814 union { ... } ;
4815 because there is no declarator after the union, the parser
4816 sends that declaration here. */
4818 {
4822 {
4826 }
4827 }
4830 }
4831 \f
4832 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4834 tree
4838 {
4839 tree attrs;
4840 tree type;
4841 enum decl_context context
4847 {
4852 /* A template type parameter or other dependent type. */
4855 else
4857 }
4859 }
4861 /* Process a DECLARATOR for a function-scope variable declaration,
4862 namespace-scope variable declaration, or function declaration.
4863 (Function definitions go through start_function; class member
4864 declarations appearing in the body of the class go through
4865 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4866 If an error occurs, the error_mark_node is returned instead.
4868 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4869 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4870 for an explicitly defaulted function, or SD_DELETED for an explicitly
4871 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4872 implicitly initialized via a default constructor. ATTRIBUTES and
4873 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4875 The scope represented by the context of the returned DECL is pushed
4876 (if it is not the global namespace) and is assigned to
4877 *PUSHED_SCOPE_P. The caller is then responsible for calling
4878 pop_scope on *PUSHED_SCOPE_P if it is set. */
4880 tree
4884 tree attributes,
4885 tree prefix_attributes,
4887 {
4888 tree decl;
4889 tree context;
4896 /* An object declared as __attribute__((deprecated)) suppresses
4897 warnings of uses of other deprecated items. */
4916 /* Is it valid for this decl to have an initializer at all?
4917 If not, set INITIALIZED to zero, which will indirectly
4918 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4921 {
4924 }
4927 {
4931 decl);
4935 }
4941 /* If this is a typedef that names the class for linkage purposes
4942 (7.1.3p8), apply any attributes directly to the type. */
4947 else
4950 /* Set attributes here so if duplicate decl, will have proper attributes. */
4953 /* Dllimported symbols cannot be defined. Static data members (which
4954 can be initialized in-class and dllimported) go through grokfield,
4955 not here, so we don't need to exclude those decls when checking for
4956 a definition. */
4958 {
4961 }
4963 /* If #pragma weak was used, mark the decl weak now. */
4975 {
4979 {
4985 {
4989 else
4990 {
4996 }
4997 }
4998 else
4999 {
5004 {
5011 }
5012 /* Static data member are tricky; an in-class initialization
5013 still doesn't provide a definition, so the in-class
5014 declaration will have DECL_EXTERNAL set, but will have an
5015 initialization. Thus, duplicate_decls won't warn
5016 about this situation, and so we check here. */
5024 }
5025 }
5026 else
5027 {
5029 this_tmpl
5030 ? current_template_parms
5036 }
5038 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
5040 /* Do not mark DECL as an explicit specialization if it was not
5041 already marked as an instantiation; a declaration should
5042 never be marked as a specialization unless we know what
5043 template is being specialized. */
5045 {
5050 else
5053 /* [temp.expl.spec] An explicit specialization of a static data
5054 member of a template is a definition if the declaration
5055 includes an initializer; otherwise, it is a declaration.
5057 We check for processing_specialization so this only applies
5058 to the new specialization syntax. */
5061 }
5064 /* Aliases are definitions. */
5067 decl);
5068 }
5072 /* Enter this declaration into the symbol table. Don't push the plain
5073 VAR_DECL for a variable template. */
5086 {
5087 /* This is a const variable with implicit 'static'. Set
5088 DECL_THIS_STATIC so we can tell it from variables that are
5089 !TREE_PUBLIC because of the anonymous namespace. */
5092 }
5096 {
5100 decl);
5103 else
5107 }
5113 }
5115 /* Process the declaration of a variable DECL. INITIALIZED is true
5116 iff DECL is explicitly initialized. (INITIALIZED is false if the
5117 variable is initialized via an implicitly-called constructor.)
5118 This function must be called for ordinary variables (including, for
5119 example, implicit instantiations of templates), but must not be
5120 called for template declarations. */
5122 void
5124 {
5125 tree type;
5140 /* If an explicit initializer is present, or if this is a definition
5141 of an aggregate, then we need a complete type at this point.
5142 (Scalars are always complete types, so there is nothing to
5143 check.) This code just sets COMPLETE_P; errors (if necessary)
5144 are issued below. */
5146 && !complete_p
5148 {
5150 /* We will not yet have set TREE_READONLY on DECL if the type
5151 was "const", but incomplete, before this point. But, now, we
5152 have a complete type, so we can try again. */
5154 }
5157 /* Is it valid for this decl to have an initializer at all? */
5158 {
5159 /* Don't allow initializations for incomplete types except for
5160 arrays which might be completed by the initialization. */
5166 {
5169 }
5171 {
5174 /* else we already gave an error in start_decl. */
5175 }
5176 }
5178 {
5181 else
5182 {
5184 decl);
5185 /* Change the type so that assemble_variable will give
5186 DECL an rtl we can live with: (mem (const_int 0)). */
5188 }
5189 }
5191 /* Create a new scope to hold this declaration if necessary.
5192 Whether or not a new scope is necessary cannot be determined
5193 until after the type has been completed; if the type is a
5194 specialization of a class template it is not until after
5195 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
5196 will be set correctly. */
5198 }
5200 /* Handle initialization of references. DECL, TYPE, and INIT have the
5201 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
5202 but will be set to a new CLEANUP_STMT if a temporary is created
5203 that must be destroyed subsequently.
5205 Returns an initializer expression to use to initialize DECL, or
5206 NULL if the initialization can be performed statically.
5208 Quotes on semantics can be found in ARM 8.4.3. */
5210 static tree
5212 {
5214 {
5220 }
5224 tf_warning_or_error);
5229 /* Note: default conversion is only called in very special cases. */
5232 /* check_initializer handles this for non-reference variables, but for
5233 references we need to do it here or the initializer will get the
5234 incomplete array type and confuse later calls to
5235 cp_complete_array_type. */
5240 {
5244 }
5246 /* Convert INIT to the reference type TYPE. This may involve the
5247 creation of a temporary, whose lifetime must be the same as that
5248 of the reference. If so, a DECL_EXPR for the temporary will be
5249 added just after the DECL_EXPR for DECL. That's why we don't set
5250 DECL_INITIAL for local references (instead assigning to them
5251 explicitly); we need to allow the temporary to be initialized
5252 first. */
5254 tf_warning_or_error);
5255 }
5257 /* Designated initializers in arrays are not supported in GNU C++.
5258 The parser cannot detect this error since it does not know whether
5259 a given brace-enclosed initializer is for a class type or for an
5260 array. This function checks that CE does not use a designated
5261 initializer. If it does, an error is issued. Returns true if CE
5262 is valid, i.e., does not have a designated initializer. */
5264 static bool
5267 {
5268 /* Designated initializers for array elements are not supported. */
5270 {
5271 /* The parser only allows identifiers as designated
5272 initializers. */
5274 {
5278 }
5280 {
5284 }
5292 {
5293 /* A C99 designator is OK if it matches the current index. */
5296 else
5298 }
5299 else
5304 }
5307 }
5309 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5310 array until we finish parsing the initializer. If that's the
5311 situation we're in, update DECL accordingly. */
5313 static void
5315 {
5321 {
5322 /* do_default is really a C-ism to deal with tentative definitions.
5323 But let's leave it here to ease the eventual merge. */
5328 /* Check that there are no designated initializers in INIT, as
5329 those are not supported in GNU C++, and as the middle-end
5330 will crash if presented with a non-numeric designated
5331 initializer. */
5333 {
5336 HOST_WIDE_INT i;
5340 }
5343 {
5345 do_default);
5347 {
5351 }
5353 {
5355 {
5358 }
5359 /* If a `static' var's size isn't known, make it extern as
5360 well as static, so it does not get allocated. If it's not
5361 `static', then don't mark it extern; finish_incomplete_decl
5362 will give it a default size and it will get allocated. */
5365 }
5367 {
5370 }
5371 }
5376 }
5377 }
5379 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5380 any appropriate error messages regarding the layout. */
5382 static void
5384 {
5385 tree type;
5391 /* If we haven't already laid out this declaration, do so now.
5392 Note that we must not call complete type for an external object
5393 because it's type might involve templates that we are not
5394 supposed to instantiate yet. (And it's perfectly valid to say
5395 `extern X x' for some incomplete type `X'.) */
5404 {
5405 /* An automatic variable with an incomplete type: that is an error.
5406 Don't talk about array types here, since we took care of that
5407 message in grokdeclarator. */
5411 }
5412 #if 0
5413 /* Keep this code around in case we later want to control debug info
5414 based on whether a type is "used". (jason 1999-11-11) */
5417 /* Let debugger know it should output info for this type. */
5422 #endif
5427 {
5430 else
5431 {
5435 }
5436 }
5437 }
5439 /* If a local static variable is declared in an inline function, or if
5440 we have a weak definition, we must endeavor to create only one
5441 instance of the variable at link-time. */
5443 void
5445 {
5446 /* Static data in a function with comdat linkage also has comdat
5447 linkage. */
5449 /* Don't mess with __FUNCTION__. */
5454 {
5456 {
5457 /* With weak symbols, we simply make the variable COMDAT;
5458 that will cause copies in multiple translations units to
5459 be merged. */
5461 }
5462 else
5463 {
5466 {
5467 /* Without weak symbols, we can use COMMON to merge
5468 uninitialized variables. */
5471 }
5472 else
5473 {
5474 /* While for initialized variables, we must use internal
5475 linkage -- which means that multiple copies will not
5476 be merged. */
5482 "%q#D are wrong (you%'ll wind up with "
5484 else
5486 "static data %q#D are wrong (you%'ll wind "
5492 }
5493 }
5494 }
5495 }
5497 /* Issue an error message if DECL is an uninitialized const variable. */
5499 static void
5501 {
5504 /* ``Unless explicitly declared extern, a const object does not have
5505 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5506 7.1.6 */
5511 {
5519 else
5520 {
5523 decl);
5525 }
5528 {
5529 tree defaulted_ctor;
5536 "constructor is not user-provided because it is "
5539 "and the implicitly-defined constructor does not "
5541 }
5542 }
5543 }
5544 \f
5545 /* Structure holding the current initializer being processed by reshape_init.
5546 CUR is a pointer to the current element being processed, END is a pointer
5547 after the last element present in the initializer. */
5548 struct reshape_iter
5549 {
5552 };
5556 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5557 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5558 initialized. If there are no more such fields, the return value
5559 will be NULL. */
5561 tree
5563 {
5572 }
5574 /* Return true for [dcl.init.list] direct-list-initialization from
5575 single element of enumeration with a fixed underlying type. */
5577 bool
5579 {
5588 }
5590 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5591 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5592 INTEGER_CST representing the size of the array minus one (the maximum index),
5593 or NULL_TREE if the array was declared without specifying the size. D is
5594 the iterator within the constructor. */
5596 static tree
5598 tsubst_flags_t complain)
5599 {
5600 tree new_init;
5605 /* The initializer for an array is always a CONSTRUCTOR. */
5609 {
5610 /* Minus 1 is used for zero sized arrays. */
5616 /* sizetype is sign extended, not zero extended. */
5617 else
5619 }
5621 /* Loop until there are no more initializers. */
5625 {
5626 tree elt_init;
5631 complain);
5639 /* This can happen with an invalid initializer (c++/54501). */
5642 }
5645 }
5647 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5648 Parameters are the same of reshape_init_r. */
5650 static tree
5652 {
5661 }
5663 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5664 Parameters are the same of reshape_init_r. */
5666 static tree
5668 {
5674 {
5677 {
5682 }
5685 }
5687 /* For a vector, we initialize it as an array of the appropriate size. */
5692 }
5694 /* Subroutine of reshape_init_r, processes the initializers for classes
5695 or union. Parameters are the same of reshape_init_r. */
5697 static tree
5699 tsubst_flags_t complain)
5700 {
5701 tree field;
5702 tree new_init;
5706 /* The initializer for a class is always a CONSTRUCTOR. */
5711 {
5712 /* [dcl.init.aggr]
5714 An initializer for an aggregate member that is an
5715 empty class shall have the form of an empty
5716 initializer-list {}. */
5718 {
5722 }
5724 }
5726 /* Loop through the initializable fields, gathering initializers. */
5728 {
5729 tree field_init;
5732 /* Handle designated initializers, as an extension. */
5734 {
5739 /* We already reshaped this. */
5743 else
5744 {
5749 }
5752 {
5757 }
5758 }
5760 /* If we processed all the member of the class, we are done. */
5770 {
5771 /* This can happen with an invalid initializer for a flexible
5772 array member (c++/54441). */
5776 }
5780 /* [dcl.init.aggr]
5782 When a union is initialized with a brace-enclosed
5783 initializer, the braces shall only contain an
5784 initializer for the first member of the union. */
5789 }
5792 }
5794 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5795 designators are not valid; either complain or return true to indicate
5796 that reshape_init_r should return error_mark_node. */
5798 static bool
5800 {
5802 {
5806 else
5808 }
5810 }
5812 /* Subroutine of reshape_init, which processes a single initializer (part of
5813 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5814 iterator within the CONSTRUCTOR which points to the initializer to process.
5815 FIRST_INITIALIZER_P is true if this is the first initializer of the
5816 outermost CONSTRUCTOR node. */
5818 static tree
5820 tsubst_flags_t complain)
5821 {
5832 {
5833 /* A complex type can be initialized from one or two initializers,
5834 but braces are not elided. */
5837 {
5839 {
5842 else
5844 }
5845 }
5847 {
5855 }
5857 }
5859 /* A non-aggregate type is always initialized with a single
5860 initializer. */
5862 {
5863 /* It is invalid to initialize a non-aggregate type with a
5864 brace-enclosed initializer before C++0x.
5865 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5866 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5867 a CONSTRUCTOR (with a record type). */
5869 /* Don't complain about a capture-init. */
5872 {
5874 {
5876 /* Isn't value-initialization. */
5878 {
5881 type);
5883 }
5884 }
5885 else
5887 }
5891 }
5893 /* "If T is a class type and the initializer list has a single element of
5894 type cv U, where U is T or a class derived from T, the object is
5895 initialized from that element." Even if T is an aggregate. */
5897 && first_initializer_p
5900 {
5903 }
5905 /* [dcl.init.aggr]
5907 All implicit type conversions (clause _conv_) are considered when
5908 initializing the aggregate member with an initializer from an
5909 initializer-list. If the initializer can initialize a member,
5910 the member is initialized. Otherwise, if the member is itself a
5911 non-empty subaggregate, brace elision is assumed and the
5912 initializer is considered for the initialization of the first
5913 member of the subaggregate. */
5915 /* But don't try this for the first initializer, since that would be
5916 looking through the outermost braces; A a2 = { a1 }; is not a
5917 valid aggregate initialization. */
5918 && !first_initializer_p
5921 complain)))
5922 {
5925 }
5927 /* [dcl.init.string]
5929 A char array (whether plain char, signed char, or unsigned char)
5930 can be initialized by a string-literal (optionally enclosed in
5931 braces); a wchar_t array can be initialized by a wide
5932 string-literal (optionally enclosed in braces). */
5935 {
5938 /* Strip one level of braces if and only if they enclose a single
5939 element (as allowed by [dcl.init.string]). */
5943 {
5945 }
5947 /* If it's a string literal, then it's the initializer for the array
5948 as a whole. Otherwise, continue with normal initialization for
5949 array types (one value per array element). */
5951 {
5956 }
5957 }
5959 /* The following cases are about aggregates. If we are not within a full
5960 initializer already, and there is not a CONSTRUCTOR, it means that there
5961 is a missing set of braces (that is, we are processing the case for
5962 which reshape_init exists). */
5964 {
5966 {
5968 /* There is no need to reshape pointer-to-member function
5969 initializers, as they are always constructed correctly
5970 by the front end. */
5971 ;
5973 /* For a nested compound literal, there is no need to reshape since
5974 brace elision is not allowed. Even if we decided to allow it,
5975 we should add a call to reshape_init in finish_compound_literal,
5976 before calling digest_init, so changing this code would still
5977 not be necessary. */
5979 else
5980 {
5984 }
5985 }
5990 type);
5991 }
5993 /* Dispatch to specialized routines. */
6000 else
6002 }
6004 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
6005 brace-enclosed aggregate initializer.
6007 INIT is the CONSTRUCTOR containing the list of initializers describing
6008 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
6009 It may not presently match the shape of the TYPE; for example:
6011 struct S { int a; int b; };
6012 struct S a[] = { 1, 2, 3, 4 };
6014 Here INIT will hold a vector of four elements, rather than a
6015 vector of two elements, each itself a vector of two elements. This
6016 routine transforms INIT from the former form into the latter. The
6017 revised CONSTRUCTOR node is returned. */
6019 tree
6021 {
6023 reshape_iter d;
6024 tree new_init;
6030 /* An empty constructor does not need reshaping, and it is always a valid
6031 initializer. */
6035 /* Handle [dcl.init.list] direct-list-initialization from
6036 single element of enumeration with a fixed underlying type. */
6038 {
6043 else
6045 }
6047 /* Recurse on this CONSTRUCTOR. */
6055 /* Make sure all the element of the constructor were used. Otherwise,
6056 issue an error about exceeding initializers. */
6058 {
6062 }
6069 }
6071 /* Verify array initializer. Returns true if errors have been reported. */
6073 bool
6075 {
6078 /* The array type itself need not be complete, because the
6079 initializer may tell us how many elements are in the array.
6080 But, the elements of the array must be complete. */
6082 {
6086 else
6089 }
6090 /* A compound literal can't have variable size. */
6094 {
6097 }
6099 }
6101 /* Subroutine of check_initializer; args are passed down from that function.
6102 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
6104 static tree
6107 {
6110 }
6112 /* Verify INIT (the initializer for DECL), and record the
6113 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
6114 grok_reference_init.
6116 If the return value is non-NULL, it is an expression that must be
6117 evaluated dynamically to initialize DECL. */
6119 static tree
6121 {
6124 tree core_type;
6126 /* Things that are going to be initialized need to have complete
6127 type. */
6131 {
6132 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
6133 it doesn't have storage to be initialized. */
6136 }
6139 /* We will have already complained. */
6143 {
6146 }
6148 {
6153 }
6154 else
6155 /* There is no way to make a variable-sized class type in GNU C++. */
6159 {
6162 {
6164 {
6167 }
6169 {
6171 "scalar object %qD requires one element in "
6175 }
6176 }
6177 }
6180 {
6187 }
6189 ;
6192 {
6194 {
6197 }
6200 /* Do not reshape constructors of vectors (they don't need to be
6201 reshaped. */
6203 {
6205 {
6207 tf_warning_or_error);
6209 }
6211 {
6212 /* Don't reshape if the class has constructors. */
6215 "in C++98 %qD must be initialized by "
6217 decl);
6218 }
6220 {
6223 }
6224 else
6225 {
6228 }
6229 }
6233 {
6236 /* We get here with code like `int a (2);' */
6238 tf_warning_or_error);
6239 }
6241 /* If DECL has an array type without a specific bound, deduce the
6242 array size from the initializer. */
6256 {
6259 /* A constructor call is a non-trivial initializer even if
6260 it isn't explicitly written. */
6264 /* If this is a constexpr initializer, expand_default_init will
6265 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6266 case, pull the initializer back out and pass it down into
6267 store_init_value. */
6272 {
6275 /* Don't call digest_init; it's unnecessary and will complain
6276 about aggregate initialization of non-aggregate classes. */
6278 }
6280 {
6281 /* Declared constexpr, but no suitable initializer; massage
6282 init appropriately so we can pass it into store_init_value
6283 for the error. */
6286 {
6290 }
6292 }
6293 else
6295 }
6298 {
6299 /* In aggregate initialization of a variable, each element
6300 initialization is a full-expression because there is no
6301 enclosing expression. */
6316 }
6317 }
6318 else
6319 {
6327 }
6333 {
6334 /* We might have set these in cp_finish_decl. */
6337 }
6341 {
6349 else
6353 {
6357 }
6359 }
6362 }
6364 /* If DECL is not a local variable, give it RTL. */
6366 static void
6368 {
6372 /* Set the DECL_ASSEMBLER_NAME for the object. */
6374 {
6375 /* The `register' keyword, when used together with an
6376 asm-specification, indicates that the variable should be
6377 placed in a particular register. */
6379 {
6382 }
6383 else
6384 {
6389 }
6390 }
6392 /* Handle non-variables up front. */
6394 {
6397 }
6399 /* If we see a class member here, it should be a static data
6400 member. */
6402 {
6404 /* An in-class declaration of a static data member should be
6405 external; it is only a declaration, and not a definition. */
6410 }
6412 /* We don't create any RTL for local variables. */
6416 /* We defer emission of local statics until the corresponding
6417 DECL_EXPR is expanded. But with constexpr its function might never
6418 be expanded, so go ahead and tell cgraph about the variable now. */
6423 /* Defer template instantiations. */
6428 /* If we're not deferring, go ahead and assemble the variable. */
6431 }
6433 /* walk_tree helper for wrap_temporary_cleanups, below. */
6435 static tree
6437 {
6438 /* Stop at types or full-expression boundaries. */
6441 {
6444 }
6447 {
6452 /* Tell honor_protect_cleanup_actions to handle this as a separate
6453 cleanup. */
6457 }
6460 }
6462 /* We're initializing a local variable which has a cleanup GUARD. If there
6463 are any temporaries used in the initializer INIT of this variable, we
6464 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6465 variable will be cleaned up properly if one of them throws.
6467 Unfortunately, there's no way to express this properly in terms of
6468 nesting, as the regions for the temporaries overlap the region for the
6469 variable itself; if there are two temporaries, the variable needs to be
6470 the first thing destroyed if either of them throws. However, we only
6471 want to run the variable's cleanup if it actually got constructed. So
6472 we need to guard the temporary cleanups with the variable's cleanup if
6473 they are run on the normal path, but not if they are run on the
6474 exceptional path. We implement this by telling
6475 honor_protect_cleanup_actions to strip the variable cleanup from the
6476 exceptional path. */
6478 static void
6480 {
6482 }
6484 /* Generate code to initialize DECL (a local variable). */
6486 static void
6488 {
6490 tree cleanup;
6498 {
6499 /* If we used it already as memory, it must stay in memory. */
6503 }
6508 /* Compute and store the initial value. */
6513 /* Generate a cleanup, if necessary. */
6516 /* Perform the initialization. */
6518 {
6522 {
6523 /* Stick simple initializers in DECL_INITIAL so that
6524 -Wno-init-self works (c++/34772). */
6529 {
6533 OPT_Winit_self,
6535 }
6536 }
6537 else
6538 {
6541 /* If we're only initializing a single object, guard the
6542 destructors of any temporaries used in its initializer with
6543 its destructor. This isn't right for arrays because each
6544 element initialization is a full-expression. */
6553 saved_stmts_are_full_exprs_p;
6554 }
6555 }
6557 /* Set this to 0 so we can tell whether an aggregate which was
6558 initialized was ever used. Don't do this if it has a
6559 destructor, so we don't complain about the 'resource
6560 allocation is initialization' idiom. Now set
6561 attribute((unused)) on types so decls of that type will be
6562 marked used. (see TREE_USED, above.) */
6564 && ! already_used
6573 }
6575 /* DECL is a VAR_DECL for a compiler-generated variable with static
6576 storage duration (like a virtual table) whose initializer is a
6577 compile-time constant. Initialize the variable and provide it to the
6578 back end. */
6580 void
6582 {
6583 tree init;
6593 }
6595 /* INIT is the initializer for a variable, as represented by the
6596 parser. Returns true iff INIT is type-dependent. */
6598 static bool
6600 {
6602 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6605 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6606 {
6619 }
6620 else
6621 /* It must be a simple expression, e.g., int i = 3; */
6625 }
6627 /* INIT is the initializer for a variable, as represented by the
6628 parser. Returns true iff INIT is value-dependent. */
6630 static bool
6632 {
6634 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6637 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6638 {
6648 }
6649 else
6650 /* It must be a simple expression, e.g., int i = 3; */
6654 }
6656 // Returns true if a DECL is VAR_DECL with the concept specifier.
6659 {
6661 // Not all variables have DECL_LANG_SPECIFIC.
6664 }
6666 /* A helper function to be called via walk_tree. If any label exists
6667 under *TP, it is (going to be) forced. Set has_forced_label_in_static. */
6669 static tree
6671 {
6677 }
6679 /* Finish processing of a declaration;
6680 install its line number and initial value.
6681 If the length of an array type is not known before,
6682 it must be determined now, from the initial value, or it is an error.
6684 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6685 true, then INIT is an integral constant expression.
6687 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6688 if the (init) syntax was used. */
6690 void
6693 {
6694 tree type;
6699 tree auto_node;
6704 {
6708 }
6711 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6718 /* Warn about register storage specifiers except when in GNU global
6719 or local register variable extension. */
6721 {
6724 "ISO C++1z does not allow %<register%> storage "
6726 else
6729 }
6731 /* If a name was specified, get the string. */
6746 {
6747 tree d_init;
6749 {
6753 {
6754 /* init is null because we're deferring instantiating the
6755 initializer until we need it. Well, we need it now. */
6758 }
6761 }
6764 {
6768 tf_warning_or_error);
6770 }
6780 {
6785 }
6787 }
6798 {
6799 tree clone;
6801 {
6802 /* FIXME check this is 1st decl. */
6807 {
6811 }
6813 }
6815 {
6818 else
6820 }
6821 }
6824 {
6826 /* If DECL is a reference, then we want to know whether init is a
6827 reference constant; init_const_expr_p as passed tells us whether
6828 it's an rvalue constant. */
6832 {
6833 /* Set these flags now for templates. We'll update the flags in
6834 store_init_value for instantiations. */
6837 /* FIXME setting TREE_CONSTANT on refs breaks the back end. */
6840 }
6841 }
6844 {
6847 /* Add this declaration to the statement-tree. */
6854 {
6857 }
6859 /* Generally, initializers in templates are expanded when the
6860 template is instantiated. But, if DECL is a variable constant
6861 then it can be used in future constant expressions, so its value
6862 must be available. */
6867 && init_const_expr_p
6872 {
6873 /* This variable seems to be a non-dependent constant, so process
6874 its initializer. If check_initializer returns non-null the
6875 initialization wasn't constant after all. */
6876 tree init_code;
6882 }
6886 {
6887 /* Deduce array size even if the initializer is dependent. */
6889 /* And complain about multiple initializers. */
6893 tf_warning_or_error);
6894 }
6899 }
6901 /* Just store non-static data member initializers for later. */
6905 /* Take care of TYPE_DECLs up front. */
6907 {
6910 {
6914 }
6916 /* If we have installed this as the canonical typedef for this
6917 type, and that type has not been defined yet, delay emitting
6918 the debug information for it, as we will emit it later. */
6924 at_eof);
6926 }
6928 /* A reference will be modified here, as it is initialized. */
6932 {
6935 }
6938 {
6939 /* If this is a local variable that will need a mangled name,
6940 register it now. We must do this before processing the
6941 initializer for the variable, since the initialization might
6942 require a guard variable, and since the mangled name of the
6943 guard variable will depend on the mangled name of this
6944 variable. */
6948 {
6950 /* Normally has_forced_label_in_static is set during GIMPLE
6951 lowering, but [cd]tors are never actually compiled directly.
6952 We need to set this early so we can deal with the label
6953 address extension. */
6957 {
6960 }
6961 /* And make sure it's in the symbol table for
6962 c_parse_final_cleanups to find. */
6964 }
6966 /* Convert the initializer to the type of DECL, if we have not
6967 already initialized DECL. */
6969 /* If !DECL_EXTERNAL then DECL is being defined. In the
6970 case of a static data member initialized inside the
6971 class-specifier, there can be an initializer even if DECL
6972 is *not* defined. */
6974 {
6978 /* Handle:
6980 [dcl.init]
6982 The memory occupied by any object of static storage
6983 duration is zero-initialized at program startup before
6984 any other initialization takes place.
6986 We cannot create an appropriate initializer until after
6987 the type of DECL is finalized. If DECL_INITIAL is set,
6988 then the DECL is statically initialized, and any
6989 necessary zero-initialization has already been performed. */
6994 /* Remember that the initialization for this variable has
6995 taken place. */
6997 /* This declaration is the definition of this variable,
6998 unless we are initializing a static data member within
6999 the class specifier. */
7002 }
7003 /* If the variable has an array type, lay out the type, even if
7004 there is no initializer. It is valid to index through the
7005 array, and we must get TYPE_ALIGN set correctly on the array
7006 type. */
7013 /* So decl is a global variable or a static member of a
7014 non local class. Record the types it uses
7015 so that we can decide later to emit debug info for them. */
7017 }
7019 /* Add this declaration to the statement-tree. This needs to happen
7020 after the call to check_initializer so that the DECL_EXPR for a
7021 reference temp is added before the DECL_EXPR for the reference itself. */
7023 {
7024 /* If we're building a variable sized type, and we might be
7025 reachable other than via the top of the current binding
7026 level, then create a new BIND_EXPR so that we deallocate
7027 the object at the right time. */
7032 {
7033 tree bind;
7038 }
7040 }
7042 /* Let the middle end know about variables and functions -- but not
7043 static data members in uninstantiated class templates. */
7045 {
7047 {
7050 }
7052 /* This needs to happen after the linkage is set. */
7056 {
7057 /* If a TREE_READONLY variable needs initialization
7058 at runtime, it is no longer readonly and we need to
7059 avoid MEM_READONLY_P being set on RTL created for it. */
7061 {
7065 }
7069 /* Likewise if it needs destruction. */
7072 }
7076 /* Check for abstractness of the type. Notice that there is no
7077 need to strip array types here since the check for those types
7078 is already done within create_array_type_for_decl. */
7082 /* No initialization required. */
7083 ;
7085 {
7087 {
7089 {
7090 /* An out-of-class default definition is defined at
7091 the point where it is explicitly defaulted. */
7096 }
7097 else
7099 }
7100 /* else no initialization required. */
7101 }
7105 {
7108 }
7109 /* A variable definition. */
7111 /* Initialize the local variable. */
7114 /* If a variable is defined, and then a subsequent
7115 definition with external linkage is encountered, we will
7116 get here twice for the same variable. We want to avoid
7117 calling expand_static_init more than once. For variables
7118 that are not static data members, we can call
7119 expand_static_init only when we actually process the
7120 initializer. It is not legal to redeclare a static data
7121 member, so this issue does not arise in that case. */
7124 }
7126 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
7127 reference, insert it in the statement-tree now. */
7129 {
7134 }
7140 }
7142 /* For class TYPE return itself or some its bases that contain
7143 any direct non-static data members. Return error_mark_node if an
7144 error has been diagnosed. */
7146 static tree
7148 {
7156 {
7160 else
7165 }
7167 {
7175 }
7176 else
7186 {
7191 {
7193 {
7198 }
7202 /* OK, found the same base along another path. We'll complain
7205 {
7207 "classes %qT and %qT have non-static data "
7210 }
7211 else
7213 }
7214 }
7216 }
7218 /* Return std::tuple_size<TYPE>::value. */
7220 static tree
7222 {
7238 else
7240 }
7242 /* Return std::tuple_element<I,TYPE>::type. */
7244 static tree
7246 {
7254 tf_warning_or_error);
7257 }
7259 /* Return e.get<i>() or get<i>(e). */
7261 static tree
7263 {
7271 /* [The id-expression] e is an lvalue if the type of the entity e is an
7272 lvalue reference and an xvalue otherwise. */
7280 {
7285 }
7286 else
7287 {
7293 }
7294 }
7296 /* It's impossible to recover the decltype of a tuple decomposition variable
7297 based on the actual type of the variable, so store it in a hash table. */
7299 static void
7301 {
7305 }
7307 tree
7309 {
7311 }
7313 /* Finish a decomposition declaration. DECL is the underlying declaration
7314 "e", FIRST is the head of a chain of decls for the individual identifiers
7315 chained through DECL_CHAIN in reverse order and COUNT is the number of
7316 those decls. */
7318 void
7320 {
7322 {
7323 error_out:
7325 {
7328 {
7331 }
7333 }
7337 }
7341 /* This happens for range for when not in templates.
7342 Still add the DECL_VALUE_EXPRs for later processing. */
7343 || (!processing_template_decl
7345 {
7347 {
7349 {
7355 }
7359 }
7361 }
7367 {
7370 }
7376 {
7379 }
7384 {
7385 tree nelts;
7390 {
7393 }
7396 {
7397 cnt_mismatch:
7401 else
7405 }
7408 {
7416 NULL_TREE);
7419 }
7420 }
7421 /* 2 GNU extensions. */
7423 {
7429 {
7437 t);
7440 }
7441 }
7443 {
7449 {
7459 NULL_TREE);
7462 }
7463 }
7465 {
7467 {
7471 }
7477 {
7488 {
7492 }
7493 /* Save the decltype away before reference collapse. */
7499 {
7500 /* In this case the names are variables, not just proxies. */
7503 }
7507 }
7508 /* Ignore reads from the underlying decl performed during initialization
7509 of the individual variables. If those will be read, we'll mark
7510 the underlying decl as read at that point. */
7512 }
7514 {
7517 }
7519 {
7522 }
7524 {
7527 }
7528 else
7529 {
7534 {
7538 }
7542 else
7543 eltscnt++;
7548 {
7552 }
7557 else
7558 {
7560 NULL_TREE);
7566 {
7569 }
7570 i++;
7571 }
7572 }
7574 {
7577 {
7582 }
7583 }
7586 }
7588 /* Returns a declaration for a VAR_DECL as if:
7590 extern "C" TYPE NAME;
7592 had been seen. Used to create compiler-generated global
7593 variables. */
7595 static tree
7597 {
7598 tree decl;
7605 /* If the user has explicitly declared this variable (perhaps
7606 because the code we are compiling is part of a low-level runtime
7607 library), then it is possible that our declaration will be merged
7608 with theirs by pushdecl. */
7614 }
7616 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
7617 if "__cxa_atexit" is not being used) corresponding to the function
7618 to be called when the program exits. */
7620 static tree
7622 {
7623 tree fn_type;
7626 {
7627 tree arg_type;
7630 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
7632 else
7633 /* The parameter to "atexit" is "void (*)(void)". */
7639 }
7642 }
7644 /* Returns a pointer to the `atexit' function. Note that if
7645 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
7646 `__cxa_atexit' function specified in the IA64 C++ ABI. */
7648 static tree
7650 {
7651 tree atexit_fndecl;
7652 tree fn_type;
7653 tree fn_ptr_type;
7661 {
7662 /* The declaration for `__cxa_atexit' is:
7664 int __cxa_atexit (void (*)(void *), void *, void *)
7666 We build up the argument types and then the function type
7667 itself. */
7671 /* First, build the pointer-to-function type for the first
7672 argument. */
7674 /* Then, build the rest of the argument types. */
7677 {
7680 }
7681 else
7682 {
7685 }
7686 /* And the final __cxa_atexit type. */
7689 NULL_TREE);
7692 else
7694 }
7695 else
7696 {
7697 /* The declaration for `atexit' is:
7699 int atexit (void (*)());
7701 We build up the argument types and then the function type
7702 itself. */
7704 /* Build the final atexit type. */
7708 }
7710 /* Now, build the function declaration. */
7718 }
7720 /* Like get_atexit_node, but for thread-local cleanups. */
7722 static tree
7724 {
7725 /* The declaration for `__cxa_thread_atexit' is:
7727 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7731 NULL_TREE);
7733 /* Now, build the function declaration. */
7737 }
7739 /* Returns the __dso_handle VAR_DECL. */
7741 static tree
7743 {
7747 /* Declare the variable. */
7749 ptr_type_node);
7751 #ifdef HAVE_GAS_HIDDEN
7753 {
7756 }
7757 #endif
7760 }
7762 /* Begin a new function with internal linkage whose job will be simply
7763 to destroy some particular variable. */
7767 static tree
7769 {
7771 tree fntype;
7772 tree fndecl;
7778 /* No need to mangle this. */
7781 /* Build the name of the function. */
7783 /* Build the function declaration. */
7786 /* It's a function with internal linkage, generated by the
7787 compiler. */
7790 /* Make the function `inline' so that it is only emitted if it is
7791 actually needed. It is unlikely that it will be inlined, since
7792 it is only called via a function pointer, but we avoid unnecessary
7793 emissions this way. */
7796 /* Build the parameter. */
7798 {
7803 }
7811 }
7813 /* Finish the cleanup function begun by start_cleanup_fn. */
7815 static void
7817 {
7821 }
7823 /* Generate code to handle the destruction of DECL, an object with
7824 static storage duration. */
7826 tree
7828 {
7829 tree cleanup;
7830 tree addr;
7831 tree compound_stmt;
7832 tree fcall;
7833 tree type;
7836 tree atex_node;
7842 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7843 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7844 destructor to "__cxa_atexit"; we don't have to build a temporary
7845 function to do the cleanup. */
7846 dso_parm = (flag_use_cxa_atexit
7851 {
7854 /* Find the destructor. */
7858 /* Make sure it is accessible. */
7860 tf_warning_or_error);
7861 }
7862 else
7863 {
7864 /* Call build_cleanup before we enter the anonymous function so
7865 that any access checks will be done relative to the current
7866 scope, rather than the scope of the anonymous function. */
7869 /* Now start the function. */
7872 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7873 to the original function, rather than the anonymous one. That
7874 will make the back end think that nested functions are in use,
7875 which causes confusion. */
7880 /* Create the body of the anonymous function. */
7885 }
7887 /* Call atexit with the cleanup function. */
7893 else
7897 {
7898 /* We must convert CLEANUP to the type that "__cxa_atexit"
7899 expects. */
7901 /* "__cxa_atexit" will pass the address of DECL to the
7902 cleanup function. */
7905 /* The declared type of the parameter to "__cxa_atexit" is
7906 "void *". For plain "T*", we could just let the
7907 machinery in cp_build_function_call convert it -- but if the
7908 type is "cv-qualified T *", then we need to convert it
7909 before passing it in, to avoid spurious errors. */
7911 }
7912 else
7913 /* Since the cleanup functions we build ignore the address
7914 they're given, there's no reason to pass the actual address
7915 in, and, in general, it's cheaper to pass NULL than any
7916 other value. */
7921 tf_warning_or_error);
7923 /* Just pass NULL to the dso handle parm if we don't actually
7924 have a DSO handle on this target. */
7926 else
7930 {
7933 {
7936 }
7937 else
7938 {
7941 }
7942 }
7943 else
7944 {
7947 }
7950 }
7952 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7953 is its initializer. Generate code to handle the construction
7954 and destruction of DECL. */
7956 static void
7958 {
7962 /* Some variables require no dynamic initialization. */
7964 {
7965 /* Make sure the destructor is callable. */
7969 }
7973 {
7977 else
7982 {
7984 "C++11 %<thread_local%> allows dynamic initialization "
7987 }
7989 }
7992 {
7993 /* Emit code to perform this initialization but once. */
7998 /* We don't need thread-safety code for thread-local vars. */
8002 /* Emit code to perform this initialization but once. This code
8003 looks like:
8005 static <type> guard;
8006 if (!__atomic_load (guard.first_byte)) {
8007 if (__cxa_guard_acquire (&guard)) {
8008 bool flag = false;
8009 try {
8010 // Do initialization.
8011 flag = true; __cxa_guard_release (&guard);
8012 // Register variable for destruction at end of program.
8013 } catch {
8014 if (!flag) __cxa_guard_abort (&guard);
8015 }
8016 }
8017 }
8019 Note that the `flag' variable is only set to 1 *after* the
8020 initialization is complete. This ensures that an exception,
8021 thrown during the construction, will cause the variable to
8022 reinitialized when we pass through this code again, as per:
8024 [stmt.dcl]
8026 If the initialization exits by throwing an exception, the
8027 initialization is not complete, so it will be tried again
8028 the next time control enters the declaration.
8030 This process should be thread-safe, too; multiple threads
8031 should not be able to initialize the variable more than
8032 once. */
8034 /* Create the guard variable. */
8037 /* Begin the conditional initialization. */
8044 {
8057 acquire_fn = push_library_fn
8060 NULL_TREE),
8065 NULL_TREE);
8075 inner_if_stmt);
8083 void_node,
8087 /* Do the initialization itself. */
8089 init = add_stmt_to_compound
8091 init = add_stmt_to_compound
8093 }
8094 else
8097 /* Use atexit to register a function for destroying this static
8098 variable. */
8104 {
8108 }
8113 }
8116 else
8118 }
8120 \f
8121 /* Make TYPE a complete type based on INITIAL_VALUE.
8122 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8123 2 if there was no information (in which case assume 0 if DO_DEFAULT),
8124 3 if the initializer list is empty (in pedantic mode). */
8126 int
8128 {
8132 /* Don't get confused by a CONSTRUCTOR for some other type. */
8139 {
8141 tree value;
8143 /* An array of character type can be initialized from a
8144 brace-enclosed string constant.
8146 FIXME: this code is duplicated from reshape_init. Probably
8147 we should just call reshape_init here? */
8151 {
8158 }
8160 /* If any of the elements are parameter packs, we can't actually
8161 complete this type now because the array size is dependent. */
8163 {
8166 {
8169 }
8170 }
8171 }
8175 /* We can create the array before the element type is complete, which
8176 means that we didn't have these two bits set in the original type
8177 either. In completing the type, we are expected to propagate these
8178 bits. See also complete_type which does the same thing for arrays
8179 of fixed size. */
8182 {
8187 }
8190 }
8192 /* As above, but either give an error or reject zero-size arrays, depending
8193 on COMPLAIN. */
8195 int
8198 {
8201 /* In SFINAE context we can't be lenient about zero-size arrays. */
8208 {
8214 {
8217 }
8221 }
8223 }
8224 \f
8225 /* Return zero if something is declared to be a member of type
8226 CTYPE when in the context of CUR_TYPE. STRING is the error
8227 message to print in that case. Otherwise, quietly return 1. */
8229 static int
8231 {
8233 {
8236 else
8239 }
8241 }
8242 \f
8243 /* Subroutine of `grokdeclarator'. */
8245 /* Generate errors possibly applicable for a given set of specifiers.
8246 This is for ARM $7.1.2. */
8248 static void
8256 {
8258 {
8295 }
8299 && !flag_noexcept_type
8305 }
8307 /* DECL is a member function or static data member and is presently
8308 being defined. Check that the definition is taking place in a
8309 valid namespace. */
8311 static void
8313 {
8314 /* These checks only apply to member functions and static data
8315 members. */
8317 /* We check for problems with specializations in pt.c in
8318 check_specialization_namespace, where we can issue better
8319 diagnostics. */
8322 /* We check this in check_explicit_instantiation_namespace. */
8325 /* [class.mfct]
8327 A member function definition that appears outside of the
8328 class definition shall appear in a namespace scope enclosing
8329 the class definition.
8331 [class.static.data]
8333 The definition for a static data member shall appear in a
8334 namespace scope enclosing the member's class definition. */
8338 }
8340 /* Build a PARM_DECL for the "this" parameter of FN. TYPE is the
8341 METHOD_TYPE for a non-static member function; QUALS are the
8342 cv-qualifiers that apply to the function. */
8344 tree
8346 {
8347 tree this_type;
8348 tree qual_type;
8349 tree parm;
8350 cp_cv_quals this_quals;
8353 {
8354 this_type
8357 }
8358 else
8360 /* The `this' parameter is implicitly `const'; it cannot be
8361 assigned to. */
8367 }
8369 /* DECL is a static member function. Complain if it was declared
8370 with function-cv-quals. */
8372 static void
8374 {
8377 decl);
8378 }
8380 // Check that FN takes no arguments and returns bool.
8381 static void
8383 {
8384 // A constraint is nullary.
8388 // The declared return type of the concept shall be bool, and
8389 // it shall not be deduced from it definition.
8395 }
8397 /* Helper function. Replace the temporary this parameter injected
8398 during cp_finish_omp_declare_simd with the real this parameter. */
8400 static tree
8402 {
8411 }
8413 /* CTYPE is class type, or null if non-class.
8414 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8415 or METHOD_TYPE.
8416 DECLARATOR is the function's name.
8417 PARMS is a chain of PARM_DECLs for the function.
8418 VIRTUALP is truthvalue of whether the function is virtual or not.
8419 FLAGS are to be passed through to `grokclassfn'.
8420 QUALS are qualifiers indicating whether the function is `const'
8421 or `volatile'.
8422 RAISES is a list of exceptions that this function can raise.
8423 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8424 not look, and -1 if we should not call `grokclassfn' at all.
8426 SFK is the kind of special function (if any) for the new function.
8428 Returns `NULL_TREE' if something goes wrong, after issuing
8429 applicable error messages. */
8431 static tree
8433 tree type,
8434 tree declarator,
8435 tree parms,
8436 tree orig_declarator,
8437 tree decl_reqs,
8440 cp_cv_quals quals,
8441 cp_ref_qualifier rqual,
8442 tree raises,
8448 special_function_kind sfk,
8451 tree in_namespace,
8453 location_t location)
8454 {
8455 tree decl;
8457 tree t;
8459 // Was the concept specifier present?
8462 // Concept declarations must have a corresponding definition.
8464 {
8467 }
8476 /* Set the constraints on the declaration. */
8478 {
8483 /* Adjust the required expression into a constraint. */
8489 }
8491 /* If we have an explicit location, use it, otherwise use whatever
8492 build_lang_decl used (probably input_location). */
8497 {
8502 /* Allocate space to hold the vptr bit if needed. */
8504 }
8508 /* Propagate volatile out from type to decl. */
8512 /* Setup decl according to sfk. */
8514 {
8525 }
8529 {
8531 error
8533 orig_declarator);
8534 else
8535 {
8540 {
8541 /* Something like `template <class T> friend void f<T>()'. */
8544 orig_declarator);
8546 }
8549 /* A friend declaration of the form friend void f<>(). Record
8550 the information in the TEMPLATE_ID_EXPR. */
8559 {
8562 decl);
8564 }
8567 {
8570 decl);
8572 }
8573 }
8574 }
8576 /* If this decl has namespace scope, set that up. */
8582 /* `main' and builtins have implicit 'C' linkage. */
8595 /* Should probably propagate const out from type to decl I bet (mrs). */
8597 {
8600 }
8606 {
8610 }
8613 {
8624 }
8626 /* Members of anonymous types and local classes have no linkage; make
8627 them internal. If a typedef is made later, this will be changed. */
8633 {
8634 /* [basic.link]: A name with no linkage (notably, the name of a class
8635 or enumeration declared in a local scope) shall not be used to
8636 declare an entity with linkage.
8638 DR 757 relaxes this restriction for C++0x. */
8640 }
8644 {
8647 }
8649 /* If the declaration was declared inline, mark it as such. */
8651 {
8655 }
8659 // If the concept declaration specifier was found, check
8660 // that the declaration satisfies the necessary requirements.
8662 {
8665 }
8669 {
8672 TYPE_UNQUALIFIED,
8673 REF_QUAL_NONE);
8676 {
8680 decl);
8682 }
8685 {
8689 decl);
8691 }
8692 }
8695 {
8697 {
8701 }
8705 }
8710 {
8714 /* [over.literal]/6: Literal operators shall not have C linkage. */
8716 {
8719 }
8722 {
8725 {
8728 }
8732 {
8736 }
8738 {
8742 }
8743 }
8744 else
8745 {
8748 }
8749 }
8752 /* Make the init_value nonzero so pushdecl knows this is not
8753 tentative. error_mark_node is replaced later with the BLOCK. */
8760 {
8761 /* Adjust "omp declare simd" attributes. */
8764 {
8765 tree attr;
8768 {
8773 {
8775 cl = c_omp_declare_simd_clauses_to_numbers
8779 else
8781 }
8782 }
8783 }
8784 }
8786 /* Caller will do the rest of this. */
8793 /* 12.4/3 */
8801 template_count,
8812 {
8815 }
8817 /* Check main's type after attributes have been applied. */
8819 {
8821 integer_type_node))
8822 {
8824 tree newtype;
8828 }
8831 }
8834 {
8836 (processing_template_decl
8838 ? current_template_parms
8845 {
8846 tree ok;
8847 tree pushed_scope;
8850 /* Because grokfndecl is always supposed to return a
8851 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8852 here. We depend on our callers to figure out that its
8853 really a template that's being returned. */
8858 {
8859 /* Remove the `this' parm added by grokclassfn. */
8862 }
8864 {
8867 }
8869 {
8874 }
8876 /* Since we've smashed OLD_DECL to its
8877 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8881 /* Attempt to merge the declarations. This can fail, in
8882 the case of some invalid specialization declarations. */
8888 {
8892 }
8896 }
8897 }
8909 }
8911 /* decl is a FUNCTION_DECL.
8912 specifiers are the parsed virt-specifiers.
8914 Set flags to reflect the virt-specifiers.
8916 Returns decl. */
8918 static tree
8920 {
8928 }
8930 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8931 the linkage that DECL will receive in the object file. */
8933 static void
8935 {
8936 /* A static data member always has static storage duration and
8937 external linkage. Note that static data members are forbidden in
8938 local classes -- the only situation in which a class has
8939 non-external linkage. */
8942 /* For non-template classes, static data members are always put
8943 out in exactly those files where they are defined, just as
8944 with ordinary namespace-scope variables. */
8947 }
8949 /* Create a VAR_DECL named NAME with the indicated TYPE.
8951 If SCOPE is non-NULL, it is the class type or namespace containing
8952 the variable. If SCOPE is NULL, the variable should is created in
8953 the innermost enclosing scope. */
8955 static tree
8957 tree name,
8958 tree orig_declarator,
8965 tree scope)
8966 {
8967 tree decl;
8968 tree explicit_scope;
8975 /* Compute the scope in which to place the variable, but remember
8976 whether or not that scope was explicitly specified by the user. */
8979 {
8980 /* An explicit "extern" specifier indicates a namespace-scope
8981 variable. */
8986 }
8990 template, we need DECL_LANG_SPECIFIC. */
8992 /* Similarly for namespace-scope variables with language linkage
8993 other than C++. */
8996 /* Similarly for static data members. */
8998 /* Similarly for explicit specializations. */
8999 || (orig_declarator
9002 else
9007 else
9011 {
9014 }
9017 {
9019 /* This function is only called with out-of-class definitions. */
9022 }
9023 /* At top level, either `static' or no s.c. makes a definition
9024 (perhaps tentative), and absence of `static' makes it public. */
9026 {
9029 || ! constp
9030 || volatilep
9033 }
9034 /* Not at top level, only `static' makes a static definition. */
9035 else
9036 {
9039 }
9042 {
9044 {
9048 }
9051 }
9053 /* If the type of the decl has no linkage, make sure that we'll
9054 notice that in mark_used. */
9063 {
9064 /* [basic.link]: A name with no linkage (notably, the name of a class
9065 or enumeration declared in a local scope) shall not be used to
9066 declare an entity with linkage.
9068 DR 757 relaxes this restriction for C++0x. */
9071 }
9072 else
9080 /* Check that the variable can be safely declared as a concept.
9081 Note that this also forbids explicit specializations. */
9083 {
9085 {
9088 }
9089 else
9094 }
9097 {
9101 }
9103 // Handle explicit specializations and instantiations of variable templates.
9109 }
9111 /* Create and return a canonical pointer to member function type, for
9112 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
9114 tree
9116 {
9118 tree t;
9123 /* Make sure that we always have the unqualified pointer-to-member
9124 type first. */
9126 {
9129 }
9131 /* If a canonical type already exists for this type, use it. We use
9132 this method instead of type_hash_canon, because it only does a
9133 simple equality check on the list of field members. */
9142 /* Let the front end know this is a pointer to member function. */
9149 delta_type_node);
9155 /* Zap out the name so that the back end will give us the debugging
9156 information for this anonymous RECORD_TYPE. */
9159 /* Cache this pointer-to-member type so that we can find it again
9160 later. */
9169 }
9171 /* Create and return a pointer to data member type. */
9173 tree
9175 {
9177 {
9182 }
9183 else
9184 {
9187 }
9188 }
9190 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
9191 Check to see that the definition is valid. Issue appropriate error
9192 messages. Return 1 if the definition is particularly bad, or 0
9193 otherwise. */
9195 static int
9197 {
9198 /* Avoid redundant diagnostics on out-of-class definitions. */
9201 /* Can't check yet if we don't know the type. */
9204 /* If DECL is declared constexpr, we'll do the appropriate checks
9205 in check_initializer. Similarly for inline static data members. */
9211 {
9214 "in-class initialization of static data member %q#D of "
9218 "%<constexpr%> needed for in-class initialization of "
9220 else
9222 "in-class initialization of static data member %q#D of "
9225 }
9227 /* Motion 10 at San Diego: If a static const integral data member is
9228 initialized with an integral constant expression, the initializer
9229 may appear either in the declaration (within the class), or in
9230 the definition, but not both. If it appears in the class, the
9231 member is a member constant. The file-scope definition is always
9232 required. */
9234 {
9236 "invalid in-class initialization of static data member "
9238 type);
9240 }
9243 "ISO C++ forbids in-class initialization of non-const "
9245 decl);
9248 "ISO C++ forbids initialization of member constant "
9252 }
9254 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
9255 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
9256 expressions out into temporary variables so that walk_tree doesn't
9257 step into them (c++/15764). */
9259 static tree
9261 {
9265 {
9271 }
9275 }
9277 /* Entry point for the above. */
9279 static void
9281 {
9283 /* Break out any function calls into temporary variables. */
9285 }
9287 /* Reduce a SIZEOF_EXPR to its value. */
9289 tree
9291 {
9292 tree r;
9299 else
9305 }
9307 /* Given the SIZE (i.e., number of elements) in an array, compute
9308 an appropriate index type for the array. If non-NULL, NAME is
9309 the name of the entity being declared. */
9311 tree
9313 {
9314 tree itype;
9321 {
9328 /* In C++98, we mark a non-constant array bound with a magic
9330 else
9331 {
9336 {
9339 {
9345 else
9348 }
9352 }
9359 }
9364 /* The array bound must be an integer type. */
9366 {
9371 else
9375 }
9376 }
9378 /* A type is dependent if it is...an array type constructed from any
9379 dependent type or whose size is specified by a constant expression
9380 that is value-dependent. */
9381 /* We can only call value_dependent_expression_p on integral constant
9382 expressions; treat non-constant expressions as dependent, too. */
9386 {
9387 /* We cannot do any checking for a SIZE that isn't known to be
9388 constant. Just build the index type and mark that it requires
9389 structural equality checks. */
9396 }
9399 {
9404 /* Use the folded result for VLAs, too; it will have resolved
9405 SIZEOF_EXPR. */
9407 }
9409 /* Normally, the array-bound will be a constant. */
9411 {
9412 /* Check to see if the array bound overflowed. Make that an
9413 error, no matter how generous we're being. */
9416 /* An array must have a positive number of elements. */
9418 {
9423 else
9426 }
9427 /* As an extension we allow zero-sized arrays. */
9429 {
9431 /* We must fail if performing argument deduction (as
9432 indicated by the state of complain), so that
9433 another substitution can be found. */
9439 else
9441 }
9442 }
9444 /* We don't allow VLAs at non-function scopes, or during
9445 tentative template substitution. */
9448 {
9451 /* `(int) &fn' is not a valid array bound. */
9454 name);
9455 else
9458 }
9460 {
9463 else
9465 }
9467 {
9471 else
9474 }
9477 /* A variable sized array. */
9479 else
9480 {
9481 HOST_WIDE_INT saved_processing_template_decl;
9483 /* Compute the index of the largest element in the array. It is
9484 one less than the number of elements in the array. We save
9485 and restore PROCESSING_TEMPLATE_DECL so that computations in
9486 cp_build_binary_op will be appropriately folded. */
9490 MINUS_EXPR,
9493 complain),
9494 complain);
9499 {
9500 /* A variable sized array. */
9506 {
9507 /* We have to add 1 -- in the ubsan routine we generate
9508 LE_EXPR rather than LT_EXPR. */
9513 }
9514 }
9515 /* Make sure that there was no overflow when creating to a signed
9516 index type. (For example, on a 32-bit machine, an array with
9517 size 2^32 - 1 is too big.) */
9520 {
9525 }
9526 }
9528 /* Create and return the appropriate index type. */
9531 /* If the index type were dependent, we would have returned early, so
9532 remember that it isn't. */
9536 }
9538 /* Returns the scope (if any) in which the entity declared by
9539 DECLARATOR will be located. If the entity was declared with an
9540 unqualified name, NULL_TREE is returned. */
9542 tree
9544 {
9548 /* If the declarator-id is a SCOPE_REF, the scope in which the
9549 declaration occurs is the first operand. */
9554 /* Otherwise, the declarator is not a qualified name; the entity will
9555 be declared in the current scope. */
9557 }
9559 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
9560 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
9561 with this type. */
9563 static tree
9565 {
9568 /* If things have already gone awry, bail now. */
9572 /* 8.3.4/1: If the type of the identifier of D contains the auto
9573 type-specifier, the program is ill-formed. */
9575 {
9578 }
9580 /* If there are some types which cannot be array elements,
9581 issue an error-message and return. */
9583 {
9587 else
9594 else
9601 else
9608 else
9614 }
9616 /* [dcl.array]
9618 The constant expressions that specify the bounds of the arrays
9619 can be omitted only for the first member of the sequence. */
9621 {
9625 name);
9626 else
9631 }
9633 /* Figure out the index type for the array. */
9637 /* [dcl.array]
9638 T is called the array element type; this type shall not be [...] an
9639 abstract class type. */
9643 }
9645 /* Returns the smallest location != UNKNOWN_LOCATION among the
9646 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
9647 and LOCATIONS[ds_restrict]. */
9649 static location_t
9651 {
9666 }
9668 /* Check that it's OK to declare a function with the indicated TYPE
9669 and TYPE_QUALS. SFK indicates the kind of special function (if any)
9670 that this function is. OPTYPE is the type given in a conversion
9671 operator declaration, or the class type for a constructor/destructor.
9672 Returns the actual return type of the function; that may be different
9673 than TYPE if an error occurs, or for certain special functions. */
9675 static tree
9677 tree type,
9678 tree optype,
9681 {
9683 {
9693 else
9704 /* We can't use the proper return type here because we run into
9705 problems with ambiguous bases and covariant returns. */
9708 else
9717 "qualifiers are not allowed on declaration of "
9728 "qualifiers are not allowed on declaration of "
9739 }
9742 }
9744 /* A variable or data member (whose unqualified name is IDENTIFIER)
9745 has been declared with the indicated TYPE. If the TYPE is not
9746 acceptable, issue an error message and return a type to use for
9747 error-recovery purposes. */
9749 tree
9751 {
9753 {
9757 {
9760 }
9761 else
9764 }
9767 }
9769 /* Handle declaring DECL as an inline variable. */
9771 static void
9773 {
9776 {
9780 }
9783 "inline variables are only available "
9786 {
9789 }
9790 }
9793 /* Assign a typedef-given name to a class or enumeration type declared
9794 as anonymous at first. This was split out of grokdeclarator
9795 because it is also used in libcc1. */
9797 void
9799 {
9802 /* Replace the anonymous name with the real name everywhere. */
9804 {
9806 /* We do not rename the debug info representing the
9807 unnamed tagged type because the standard says in
9808 [dcl.typedef] that the naming applies only for
9809 linkage purposes. */
9810 /*debug_hooks->set_name (t, decl);*/
9812 }
9817 /* If this is a typedef within a template class, the nested
9818 type is a (non-primary) template. The name for the
9819 template needs updating as well. */
9824 /* Adjust linkage now that we aren't unnamed anymore. */
9827 /* FIXME remangle member functions; member functions of a
9828 type with external linkage have external linkage. */
9830 /* Check that our job is done, and that it would fail if we
9831 attempted to do it again. */
9833 }
9835 /* Given declspecs and a declarator (abstract or otherwise), determine
9836 the name and type of the object declared and construct a DECL node
9837 for it.
9839 DECLSPECS points to the representation of declaration-specifier
9840 sequence that precedes declarator.
9842 DECL_CONTEXT says which syntactic context this declaration is in:
9843 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9844 FUNCDEF for a function definition. Like NORMAL but a few different
9845 error messages in each case. Return value may be zero meaning
9846 this definition is too screwy to try to parse.
9847 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9848 handle member functions (which have FIELD context).
9849 Return value may be zero meaning this definition is too screwy to
9850 try to parse.
9851 PARM for a parameter declaration (either within a function prototype
9852 or before a function body). Make a PARM_DECL, or return void_type_node.
9853 TPARM for a template parameter declaration.
9854 CATCHPARM for a parameter declaration before a catch clause.
9855 TYPENAME if for a typename (in a cast or sizeof).
9856 Don't make a DECL node; just return the ..._TYPE node.
9857 FIELD for a struct or union field; make a FIELD_DECL.
9858 BITFIELD for a field with specified width.
9860 INITIALIZED is as for start_decl.
9862 ATTRLIST is a pointer to the list of attributes, which may be NULL
9863 if there are none; *ATTRLIST may be modified if attributes from inside
9864 the declarator should be applied to the declaration.
9866 When this function is called, scoping variables (such as
9867 CURRENT_CLASS_TYPE) should reflect the scope in which the
9868 declaration occurs, not the scope in which the new declaration will
9869 be placed. For example, on:
9871 void S::f() { ... }
9873 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
9874 should not be `S'.
9876 Returns a DECL (if a declarator is present), a TYPE (if there is no
9877 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
9878 error occurs. */
9880 tree
9886 {
9898 /* True if this declarator is a function definition. */
9902 #if 0
9903 /* See the code below that used this. */
9905 #endif
9907 /* Keep track of what sort of function is being processed
9908 so that we can warn about default return values, or explicit
9909 return values which do not match prescribed defaults. */
9915 /* cv-qualifiers that apply to the declarator, for a declaration of
9916 a member function. */
9918 /* virt-specifiers that apply to the declarator, for a declaration of
9919 a member function. */
9921 /* ref-qualifier that applies to the declarator, for a declaration of
9922 a member function. */
9924 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
9931 /* The unqualified name of the declarator; either an
9932 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
9933 tree unqualified_id;
9934 /* The class type, if any, in which this entity is located,
9935 or NULL_TREE if none. Note that this value may be different from
9936 the current class type; for example if an attempt is made to declare
9937 "A::f" inside "B", this value will be "A". */
9939 /* The NAMESPACE_DECL for the namespace in which this entity is
9940 located. If an unqualified name is used to declare the entity,
9941 this value will be NULL_TREE, even if the entity is located at
9942 namespace scope. */
9944 cp_storage_class storage_class;
9965 // Was concept_p specified? Note that ds_concept
9966 // implies ds_constexpr!
9997 /* Look inside a declarator for the name being declared
9998 and get it as a string, for an error message. */
10000 id_declarator;
10002 {
10007 {
10011 {
10015 }
10019 {
10025 {
10027 {
10028 /* [dcl.meaning]
10030 A declarator-id shall not be qualified except
10031 for ...
10033 None of the cases are permitted in block
10034 scope. */
10037 decl);
10041 else
10045 }
10047 {
10050 {
10053 }
10055 && current_class_type
10057 current_class_type))
10058 {
10062 }
10063 }
10066 }
10068 {
10070 {
10071 tree type;
10074 {
10077 }
10080 {
10083 }
10090 }
10094 {
10100 }
10101 /* Fall through. */
10108 {
10110 dname);
10112 }
10115 else
10116 {
10123 else
10125 }
10130 }
10132 }
10149 }
10152 }
10154 /* [dcl.fct.edf]
10156 The declarator in a function-definition shall have the form
10157 D1 ( parameter-declaration-clause) ... */
10159 {
10162 }
10167 {
10170 }
10173 {
10176 {
10179 }
10182 {
10184 {
10187 }
10189 {
10192 }
10193 }
10194 }
10196 /* Anything declared one level down from the top level
10197 must be one of the parameters of a function
10198 (because the body is at least two levels down). */
10200 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
10201 by not allowing C++ class definitions to specify their parameters
10202 with xdecls (must be spec.d in the parmlist).
10204 Since we now wait to push a class scope until we are sure that
10205 we are in a legitimate method context, we must set oldcname
10206 explicitly (since current_class_name is not yet alive).
10208 We also want to avoid calling this a PARM if it is in a namespace. */
10211 {
10217 }
10223 {
10226 }
10229 {
10232 }
10234 /* If there were multiple types specified in the decl-specifier-seq,
10235 issue an error message. */
10237 {
10240 }
10243 {
10246 }
10248 /* Extract the basic type from the decl-specifier-seq. */
10251 {
10254 }
10255 /* If the entire declaration is itself tagged as deprecated then
10256 suppress reports of deprecated items. */
10261 {
10268 }
10269 /* No type at all: default to `int', and set DEFAULTED_INT
10270 because it was not a user-defined typedef. */
10272 {
10274 {
10275 /* These imply 'int'. */
10278 }
10279 /* If we just have "complex", it is equivalent to "complex double". */
10282 {
10285 "ISO C++ does not support plain %<complex%> meaning "
10287 }
10288 }
10289 /* Gather flags. */
10293 #if 0
10294 /* See the code below that used this. */
10297 #endif
10302 else
10306 {
10308 ctor_return_type,
10309 type_quals,
10312 }
10314 {
10319 /* We handle `main' specially here, because 'main () { }' is so
10320 common. With no options, it is allowed. With -Wreturn-type,
10321 it is a warning. It is only an error with -pedantic-errors. */
10322 is_main = (funcdef_flag
10338 else
10343 /* FIXME we should be able to propagate the error_mark_node as is
10344 for other contexts too. */
10346 else
10348 }
10353 {
10355 {
10359 }
10364 }
10366 /* Now process the modifiers that were specified
10367 and check for invalid combinations. */
10369 /* Long double is a special combination. */
10371 {
10375 }
10377 /* Check all other uses of type modifiers. */
10380 {
10402 {
10407 }
10408 else
10409 {
10412 {
10415 name);
10418 }
10419 }
10421 /* Discard the type modifiers if they are invalid. */
10423 {
10429 }
10430 }
10432 /* Decide whether an integer type is signed or not.
10433 Optionally treat bitfields as signed by default. */
10435 /* [class.bit]
10437 It is implementation-defined whether a plain (neither
10438 explicitly signed or unsigned) char, short, int, or long
10439 bit-field is signed or unsigned.
10441 Naturally, we extend this to long long as well. Note that
10442 this does not include wchar_t. */
10444 && !signed_p
10445 /* A typedef for plain `int' without `signed' can be
10446 controlled just like plain `int', but a typedef for
10447 `signed int' cannot be so controlled. */
10448 && !(typedef_decl
10452 {
10465 else
10467 }
10480 {
10483 /* If a modifier is specified, the resulting complex is the complex
10484 form of TYPE. E.g, "complex short" is "complex short int". */
10493 else
10495 }
10497 /* If we're using the injected-class-name to form a compound type or a
10498 declaration, replace it with the underlying class so we don't get
10499 redundant typedefs in the debug output. But if we are returning the
10500 type unchanged, leave it alone so that it's available to
10501 maybe_get_template_decl_from_type_decl. */
10509 type = cp_build_qualified_type_real
10513 /* We might have ignored or rejected some of the qualifiers. */
10520 {
10524 }
10536 {
10538 {
10543 }
10547 }
10550 /* Issue errors about use of storage classes for parameters. */
10552 {
10554 {
10557 }
10559 {
10562 }
10568 /* Function parameters cannot be concept. */
10571 /* Function parameters cannot be constexpr. If we saw one, moan
10572 and pretend it wasn't there. */
10574 {
10577 }
10578 }
10580 /* Give error if `virtual' is used outside of class declaration. */
10583 {
10587 }
10590 {
10605 declspecs->gnu_thread_keyword_p
10611 {
10636 }
10639 {
10641 {
10645 "type must be cv-qualified %<auto%> or reference to "
10647 }
10650 }
10660 }
10662 /* Static anonymous unions are dealt with here. */
10668 /* Warn about storage classes that are invalid for certain
10669 kinds of declarations (parameters, typenames, etc.). */
10671 && ((storage_class
10675 {
10678 }
10683 {
10687 ;
10689 ;
10691 /* C++ allows static class elements. */
10693 /* C++ also allows inlines and signed and unsigned elements,
10694 but in those cases we don't come in here. */
10695 ;
10696 else
10697 {
10700 else
10701 {
10704 else
10706 }
10712 }
10713 }
10718 {
10721 }
10725 {
10730 /* When thread_local is applied to a variable of block scope the
10731 storage-class-specifier static is implied if it does not appear
10732 explicitly. */
10735 }
10738 {
10742 }
10746 else
10747 {
10750 {
10763 }
10764 }
10767 {
10768 /* Apply the c++11 attributes to the type preceding them. */
10772 }
10774 /* Determine the type of the entity declared by recurring on the
10775 declarator. */
10777 {
10779 tree attrs;
10786 {
10798 attr_flags);
10799 }
10807 {
10815 /* [dcl.array]/1:
10817 The optional attribute-specifier-seq appertains to the
10818 array. */
10824 {
10825 tree arg_types;
10828 /* Declaring a function type.
10829 Make sure we have a valid type for the function to return. */
10832 {
10834 {
10837 }
10838 /* We now know that the TYPE_QUALS don't apply to the
10839 decl, but to its return type. */
10841 }
10843 /* Error about some types functions can't return. */
10846 {
10849 }
10851 {
10854 }
10860 /* Pick up type qualifiers which should be applied to `this'. */
10862 /* Pick up virt-specifiers. */
10864 /* And ref-qualifier, too */
10866 /* And tx-qualifier. */
10868 /* Pick up the exception specifications. */
10870 /* If the exception-specification is ill-formed, let's pretend
10871 there wasn't one. */
10879 /* Say it's a definition only for the CALL_EXPR
10880 closest to the identifier. */
10883 /* Handle a late-specified return type. */
10886 {
10888 {
10890 {
10895 {
10897 "%<auto%> type specifier without trailing "
10900 "only available with -std=c++14 or "
10902 }
10904 {
10908 }
10909 }
10911 {
10916 }
10918 {
10920 {
10923 "for %qT must have trailing return "
10925 else
10928 type);
10931 }
10937 else
10941 }
10942 }
10945 {
10947 /* Not using maybe_warn_cpp0x because this should
10948 always be an error. */
10951 else
10955 }
10956 }
10966 && funcdecl_p
10972 {
10973 /* We are within a class's scope. If our declarator name
10974 is the same as the class name, and we are defining
10975 a function, then it is a constructor/destructor, and
10976 therefore returns a void type. */
10978 /* ISO C++ 12.4/2. A destructor may not be declared
10979 const or volatile. A destructor may not be static.
10980 A destructor may not be declared with ref-qualifier.
10982 ISO C++ 12.1. A constructor may not be declared
10983 const or volatile. A constructor may not be
10984 virtual. A constructor may not be static.
10985 A constructor may not be declared with ref-qualifier. */
10991 {
10996 }
10999 {
11005 }
11009 current_class_type,
11010 flags))
11014 {
11015 /* It's a constructor. */
11019 {
11023 }
11027 }
11030 }
11032 {
11034 {
11035 /* Cannot be both friend and virtual. */
11038 }
11044 name);
11045 }
11047 {
11049 {
11052 }
11055 }
11057 {
11060 }
11069 {
11073 }
11079 {
11081 /* transaction_safe applies to the type, but
11082 transaction_safe_dynamic applies to the function. */
11085 else
11087 }
11089 /* [dcl.fct]/2:
11091 The optional attribute-specifier-seq appertains to
11092 the function type. */
11097 }
11103 /* Filter out pointers-to-references and references-to-references.
11104 We can get these if a TYPE_DECL is used. */
11107 {
11109 {
11112 }
11114 /* In C++0x, we allow reference to reference declarations
11115 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
11116 and template type arguments [14.3.1/4 temp.arg.type]. The
11117 check for direct reference to reference declarations, which
11118 are still forbidden, occurs below. Reasoning behind the change
11119 can be found in DR106, DR540, and the rvalue reference
11120 proposals. */
11122 {
11125 }
11126 }
11128 {
11133 }
11135 /* We now know that the TYPE_QUALS don't apply to the decl,
11136 but to the target of the pointer. */
11139 /* This code used to handle METHOD_TYPE, but I don't think it's
11140 possible to get it here anymore. */
11144 {
11148 memfn_quals,
11149 rqual);
11155 }
11163 type);
11165 /* When the pointed-to type involves components of variable size,
11166 care must be taken to ensure that the size evaluation code is
11167 emitted early enough to dominate all the possible later uses
11168 and late enough for the variables on which it depends to have
11169 been assigned.
11171 This is expected to happen automatically when the pointed-to
11172 type has a name/declaration of it's own, but special attention
11173 is required if the type is anonymous.
11175 We handle the NORMAL and FIELD contexts here by inserting a
11176 dummy statement that just evaluates the size at a safe point
11177 and ensures it is not deferred until e.g. within a deeper
11178 conditional context (c++/43555).
11180 We expect nothing to be needed here for PARM or TYPENAME.
11181 Evaluating the size at this point for TYPENAME would
11182 actually be incorrect, as we might be in the middle of an
11183 expression with side effects on the pointed-to type size
11184 "arguments" prior to the pointer declaration point and the
11185 size evaluation could end up prior to the side effects. */
11191 {
11195 }
11198 {
11199 /* In C++0x, the type we are creating a reference to might be
11200 a typedef which is itself a reference type. In that case,
11201 we follow the reference collapsing rules in
11202 [7.1.3/8 dcl.typedef] to create the final reference type:
11204 "If a typedef TD names a type that is a reference to a type
11205 T, an attempt to create the type 'lvalue reference to cv TD'
11206 creates the type 'lvalue reference to T,' while an attempt
11207 to create the type "rvalue reference to cv TD' creates the
11208 type TD."
11209 */
11213 {
11216 else
11218 }
11219 else
11220 type = cp_build_reference_type
11223 /* In C++0x, we need this check for direct reference to
11224 reference declarations, which are forbidden by
11225 [8.3.2/5 dcl.ref]. Reference to reference declarations
11226 are only allowed indirectly through typedefs and template
11227 type arguments. Example:
11229 void foo(int & &); // invalid ref-to-ref decl
11231 typedef int & int_ref;
11232 void foo(int_ref &); // valid ref-to-ref decl
11233 */
11237 }
11241 {
11245 /* We will already have complained. */
11247 else
11249 type);
11250 }
11251 else
11254 /* Process a list of type modifier keywords (such as
11255 const or volatile) that were given inside the `*' or `&'. */
11258 {
11259 type
11263 }
11265 /* Apply C++11 attributes to the pointer, and not to the
11266 type pointed to. This is unlike what is done for GNU
11267 attributes above. It is to comply with [dcl.ptr]/1:
11269 [the optional attribute-specifier-seq (7.6.1) appertains
11270 to the pointer and not to the object pointed to]. */
11283 }
11284 }
11286 /* A `constexpr' specifier used in an object declaration declares
11287 the object as `const'. */
11289 {
11290 /* DR1688 says that a `constexpr' specifier in combination with
11291 `volatile' is valid. */
11294 {
11297 }
11298 }
11304 {
11306 unqualified_id);
11308 }
11310 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
11311 qualified with a class-name, turn it into a METHOD_TYPE, unless
11312 we know that the function is static. We take advantage of this
11313 opportunity to do other processing that pertains to entities
11314 explicitly declared to be class members. Note that if DECLARATOR
11315 is non-NULL, we know it is a cdk_id declarator; otherwise, we
11316 would not have exited the loop above. */
11321 {
11327 {
11329 {
11333 }
11334 else
11338 }
11340 can skip the following checks. */
11343 qualifying type must certainly be complete. */
11344 funcdef_flag
11345 /* A friend declaration of "T::f" is OK, even if
11346 "T" is a template parameter. But, if this
11347 function is not a friend, the qualifying type
11348 must be a class. */
11350 /* For a declaration, the type need not be
11351 complete, if either it is dependent (since there
11352 is no meaningful definition of complete in that
11353 case) or the qualifying class is currently being
11354 defined. */
11357 /* Check that the qualifying type is complete. */
11361 {
11364 {
11372 }
11373 }
11375 {
11379 }
11380 }
11385 /* Now TYPE has the actual type. */
11388 {
11391 else
11393 }
11399 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
11400 a declarator-id appertains to the entity that is declared. */
11403 /* Handle parameter packs. */
11405 {
11407 /* Turn the type into a pack expansion.*/
11409 else
11411 }
11414 && !processing_template_decl
11416 {
11419 else
11422 }
11425 {
11426 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
11427 in the declaration of a constructor or conversion function within
11428 a class definition. */
11435 else
11437 "only declarations of constructors and conversion operators "
11440 }
11443 {
11445 {
11448 }
11450 {
11453 }
11456 {
11459 }
11461 {
11464 }
11466 {
11469 }
11471 {
11475 }
11476 }
11478 /* If this is declaring a typedef name, return a TYPE_DECL. */
11480 {
11481 tree decl;
11483 /* This declaration:
11485 typedef void f(int) const;
11487 declares a function type which is not a member of any
11488 particular class, but which is cv-qualified; for
11489 example "f S::*" declares a pointer to a const-qualified
11490 member function of S. We record the cv-qualification in the
11491 function type. */
11493 {
11496 /* We have now dealt with these qualifiers. */
11499 }
11502 {
11505 }
11512 else
11518 }
11521 {
11525 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
11527 /* The TYPE_DECL is "abstract" because there will be
11528 clones of this constructor/destructor, and there will
11529 be copies of this TYPE_DECL generated in those
11530 clones. The decloning optimization (for space) may
11531 revert this subsequently if it determines that
11532 the clones should share a common implementation. */
11534 }
11539 unqualified_id);
11541 /* If the user declares "typedef struct {...} foo" then the
11542 struct will have an anonymous name. Fill that name in now.
11543 Nothing can refer to it, so nothing needs know about the name
11544 change. */
11546 && unqualified_id
11564 /* Acknowledge that this was written:
11565 `using analias = atype;'. */
11569 }
11571 /* Detect the case of an array type of unspecified size
11572 which came, as such, direct from a typedef name.
11573 We must copy the type, so that the array's domain can be
11574 individually set by the object's initializer. */
11581 /* Detect where we're using a typedef of function type to declare a
11582 function. PARMS will not be set, so we must create it now. */
11585 {
11587 tree args;
11592 {
11598 }
11603 {
11604 /* The qualifiers on the function type become the qualifiers on
11605 the non-static member function. */
11609 }
11610 }
11612 /* If this is a type name (such as, in a cast or sizeof),
11613 compute the type and return it now. */
11616 {
11617 /* Note that here we don't care about type_quals. */
11619 /* Special case: "friend class foo" looks like a TYPENAME context. */
11621 {
11623 {
11626 }
11629 {
11630 /* Don't allow friend declaration without a class-key. */
11637 else
11640 type);
11641 }
11643 /* Only try to do this stuff if we didn't already give up. */
11645 {
11646 /* A friendly class? */
11650 else
11652 type);
11655 }
11656 }
11658 {
11665 /* Core issue #547: need to allow this in template type args.
11666 Allow it in general in C++11 for alias-declarations. */
11670 else
11672 }
11678 }
11682 && ! bitfield
11684 {
11687 }
11690 {
11691 /* Only functions may be declared using an operator-function-id. */
11693 {
11696 }
11701 type);
11702 }
11704 /* We don't check parameter types here because we can emit a better
11705 error message later. */
11707 {
11711 }
11713 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
11714 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
11717 {
11723 {
11726 else
11729 }
11731 /* A parameter declared as an array of T is really a pointer to T.
11732 One declared as a function is really a pointer to a function.
11733 One declared as a member is really a pointer to member. */
11736 {
11737 /* Transfer const-ness of array into that of type pointed to. */
11741 }
11744 }
11749 {
11755 }
11757 {
11761 {
11768 }
11770 {
11773 {
11779 else
11783 }
11785 /* The C99 flexible array extension. */
11788 {
11792 {
11795 }
11796 else
11797 {
11798 /* Array is a flexible member. */
11800 /* Do not warn on flexible array members in system
11805 else
11809 /* Flexible array member has a null domain. */
11811 }
11812 }
11815 {
11816 /* Happens when declaring arrays of sizes which
11817 are error_mark_node, for example. */
11819 }
11821 {
11822 /* Something like struct S { int N::j; }; */
11825 }
11828 {
11830 tree function_context;
11833 {
11834 /* This should never happen in pure C++ (the check
11835 could be an assert). It could happen in
11836 Objective-C++ if someone writes invalid code that
11837 uses a function declaration for an instance
11838 variable or property (instance variables and
11839 properties are parsed as FIELD_DECLs, but they are
11840 part of an Objective-C class, not a C++ class).
11841 That code is invalid and is caught by this
11842 check. */
11844 {
11846 unqualified_id);
11848 }
11850 /* ``A union may [ ... ] not [ have ] virtual functions.''
11851 ARM 9.5 */
11853 {
11855 unqualified_id);
11857 }
11862 {
11866 }
11867 }
11869 /* Check that the name used for a destructor makes sense. */
11871 {
11875 {
11880 }
11883 {
11887 }
11889 {
11892 }
11894 {
11897 }
11898 }
11900 {
11905 }
11908 {
11911 }
11913 {
11916 }
11919 {
11922 {
11928 }
11929 }
11931 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
11943 parms,
11944 unqualified_id,
11945 reqs,
11955 #if 0
11956 /* This clobbers the attrs stored in `decl' from `attrlist'. */
11957 /* The decl and setting of decl_attr is also turned off. */
11959 #endif
11961 /* [class.conv.ctor]
11963 A constructor declared without the function-specifier
11964 explicit that can be called with a single parameter
11965 specifies a conversion from the type of its first
11966 parameter to the type of its class. Such a constructor
11967 is called a converting constructor. */
11970 }
11975 {
11978 {
11980 {
11984 }
11985 else
11990 }
11991 }
11992 else
11993 {
11995 {
11999 }
12001 }
12004 {
12005 /* Friends are treated specially. */
12009 {
12011 {
12012 decl = check_explicit_specialization
12017 }
12021 funcdef_flag);
12023 }
12024 else
12026 }
12028 /* Structure field. It may not be a function, except for C++. */
12031 {
12033 {
12034 /* C++ allows static class members. All other work
12035 for this is done by grokfield. */
12043 unqualified_id);
12045 {
12049 }
12056 /* Even if there is an in-class initialization, DECL
12057 is considered undefined until an out-of-class
12058 definition is provided, unless this is an inline
12059 variable. */
12063 {
12069 }
12070 }
12071 else
12072 {
12075 unqualified_id);
12077 {
12079 unqualified_id);
12081 }
12089 {
12092 }
12095 {
12096 /* An attempt is being made to initialize a non-static
12097 member. This is new in C++11. */
12100 /* If this has been parsed with static storage class, but
12101 errors forced staticp to be cleared, ensure NSDMI is
12102 not present. */
12105 }
12106 }
12112 }
12113 }
12116 {
12117 tree original_name;
12125 else
12127 // FIXME:gcc_assert (original_name == dname);
12134 {
12137 name);
12138 else
12140 name);
12141 }
12145 /* Function declaration not at top level.
12146 Storage classes other than `extern' are not allowed
12147 and `extern' makes no difference. */
12152 {
12155 "%<static%> specifier invalid for function %qs "
12157 else
12159 "%<inline%> specifier invalid for function %qs "
12161 }
12164 {
12166 {
12169 }
12172 {
12177 }
12178 }
12180 /* Record whether the function is public. */
12190 publicp,
12193 sfk,
12194 funcdef_flag,
12203 {
12206 /* Don't allow a static member function in a class, and forbid
12207 declaring main to be static. */
12209 {
12213 }
12215 {
12216 /* 7.1.1: There can be no static function declarations within a
12217 block. */
12220 }
12223 {
12226 }
12227 }
12228 }
12229 else
12230 {
12231 /* It's a variable. */
12233 /* An uninitialized decl with `extern' is a reference. */
12235 declspecs,
12236 initialized,
12237 type_quals,
12238 inlinep,
12239 concept_p,
12240 template_count,
12250 {
12253 {
12258 }
12260 {
12263 }
12265 {
12267 "cannot explicitly declare member %q#D to have "
12270 }
12271 }
12273 {
12275 decl);
12277 }
12282 {
12287 }
12288 }
12293 {
12297 }
12300 {
12302 {
12303 /* It's common practice (and completely valid) to have a const
12304 be initialized and declared extern. */
12307 }
12308 else
12309 {
12312 }
12313 }
12315 /* Record `register' declaration for warnings on &
12316 and in case doing stupid register allocation. */
12319 {
12321 /* Warn about register storage specifiers on PARM_DECLs. */
12323 {
12326 "ISO C++1z does not allow %<register%> storage "
12328 else
12331 }
12332 }
12338 /* Set constexpr flag on vars (functions got it in grokfndecl). */
12342 /* Record constancy and volatility on the DECL itself . There's
12343 no need to do this when processing a template; we'll do this
12344 for the instantiated declaration based on the type of DECL. */
12349 }
12350 }
12351 \f
12352 /* Subroutine of start_function. Ensure that each of the parameter
12353 types (as listed in PARMS) is complete, as is required for a
12354 function definition. */
12356 static void
12358 {
12360 {
12365 {
12371 }
12372 else
12373 /* grokparms or complete_type_or_else will have already issued
12374 an error. */
12376 }
12377 }
12379 /* Returns nonzero if T is a local variable. */
12381 int
12383 {
12385 /* A VAR_DECL with a context that is a _TYPE is a static data
12386 member. */
12388 /* Any other non-local variable must be at namespace scope. */
12394 }
12396 /* Like local_variable_p, but suitable for use as a tree-walking
12397 function. */
12399 static tree
12402 {
12410 }
12412 /* Check that ARG, which is a default-argument expression for a
12413 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
12414 something goes wrong. DECL may also be a _TYPE node, rather than a
12415 DECL, if there is no DECL available. */
12417 tree
12419 {
12420 tree var;
12421 tree decl_type;
12424 /* We get a DEFAULT_ARG when looking at an in-class declaration
12425 with a default argument. Ignore the argument for now; we'll
12426 deal with it after the class is complete. */
12430 {
12433 }
12434 else
12441 /* Something already went wrong. There's no need to check
12442 further. */
12445 /* [dcl.fct.default]
12447 A default argument expression is implicitly converted to the
12448 parameter type. */
12451 LOOKUP_IMPLICIT);
12454 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
12455 the call sites. */
12460 /* [dcl.fct.default]
12462 Local variables shall not be used in default argument
12463 expressions.
12465 The keyword `this' shall not be used in a default argument of a
12466 member function. */
12469 {
12471 {
12475 else
12477 }
12479 }
12481 /* All is well. */
12483 }
12485 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
12487 static tree
12489 {
12494 {
12497 else
12499 }
12501 /* Do warn about using typedefs to a deprecated class. */
12513 return type_is_deprecated
12517 }
12519 /* Decode the list of parameter types for a function type.
12520 Given the list of things declared inside the parens,
12521 return a list of types.
12523 If this parameter does not end with an ellipsis, we append
12524 void_list_node.
12526 *PARMS is set to the chain of PARM_DECLs created. */
12528 tree
12530 {
12533 tree parm;
12537 {
12550 {
12552 && !init
12555 /* DR 577: A parameter list consisting of a single
12556 unnamed parameter of non-dependent type 'void'. */
12560 "invalid use of cv-qualified type %qT in "
12562 else
12564 "invalid use of type %<void%> in parameter "
12566 /* It's not a good idea to actually create parameters of
12567 type `void'; other parts of the compiler assume that a
12568 void type terminates the parameter list. */
12571 }
12574 {
12576 {
12580 }
12582 /* Top-level qualifiers on the parameters are
12583 ignored for function types. */
12586 {
12590 }
12594 {
12595 /* [dcl.fct]/6, parameter types cannot contain pointers
12596 (references) to arrays of unknown bound. */
12601 {
12609 }
12617 }
12623 }
12628 }
12636 }
12638 \f
12639 /* D is a constructor or overloaded `operator='.
12641 Let T be the class in which D is declared. Then, this function
12642 returns:
12644 -1 if D's is an ill-formed constructor or copy assignment operator
12645 whose first parameter is of type `T'.
12646 0 if D is not a copy constructor or copy assignment
12647 operator.
12648 1 if D is a copy constructor or copy assignment operator whose
12649 first parameter is a reference to non-const qualified T.
12650 2 if D is a copy constructor or copy assignment operator whose
12651 first parameter is a reference to const qualified T.
12653 This function can be used as a predicate. Positive values indicate
12654 a copy constructor and nonzero values indicate a copy assignment
12655 operator. */
12657 int
12659 {
12660 tree args;
12661 tree arg_type;
12669 /* Instantiations of template member functions are never copy
12670 functions. Note that member functions of templated classes are
12671 represented as template functions internally, and we must
12672 accept those as copy functions. */
12684 {
12685 /* Pass by value copy assignment operator. */
12687 }
12691 {
12694 }
12695 else
12701 /* There are more non-optional args. */
12705 }
12707 /* D is a constructor or overloaded `operator='.
12709 Let T be the class in which D is declared. Then, this function
12710 returns true when D is a move constructor or move assignment
12711 operator, false otherwise. */
12713 bool
12715 {
12719 /* There are no move constructors if we are in C++98 mode. */
12725 /* Instantiations of template member functions are never move
12726 functions. Note that member functions of templated classes are
12727 represented as template functions internally, and we must
12728 accept those as move functions. */
12732 }
12734 /* D is a constructor or overloaded `operator='.
12736 Then, this function returns true when D has the same signature as a move
12737 constructor or move assignment operator (because either it is such a
12738 ctor/op= or it is a template specialization with the same signature),
12739 false otherwise. */
12741 bool
12743 {
12744 tree args;
12745 tree arg_type;
12765 /* There are more non-optional args. */
12769 }
12771 /* Remember any special properties of member function DECL. */
12773 void
12775 {
12776 tree class_type;
12783 {
12790 {
12791 /* [class.copy]
12793 A non-template constructor for class X is a copy
12794 constructor if its first parameter is of type X&, const
12795 X&, volatile X& or const volatile X&, and either there
12796 are no other parameters or else all other parameters have
12797 default arguments. */
12803 }
12814 }
12816 {
12817 /* [class.copy]
12819 A non-template assignment operator for class X is a copy
12820 assignment operator if its parameter is of type X, X&, const
12821 X&, volatile X& or const volatile X&. */
12826 {
12832 }
12835 }
12836 /* Destructors are handled in check_methods. */
12837 }
12839 /* Check a constructor DECL has the correct form. Complains
12840 if the class has a constructor of the form X(X). */
12842 bool
12844 {
12848 {
12849 /* [class.copy]
12851 A declaration of a constructor for a class X is ill-formed if
12852 its first parameter is of type (optionally cv-qualified) X
12853 and either there are no other parameters or else all other
12854 parameters have default arguments.
12856 We *don't* complain about member template instantiations that
12857 have this form, though; they can occur as we try to decide
12858 what constructor to use during overload resolution. Since
12859 overload resolution will never prefer such a constructor to
12860 the non-template copy constructor (which is either explicitly
12861 or implicitly defined), there's no need to worry about their
12862 existence. Theoretically, they should never even be
12863 instantiated, but that's hard to forestall. */
12867 }
12870 }
12872 /* An operator with this code is unary, but can also be binary. */
12874 static bool
12876 {
12883 }
12885 /* An operator with this name can only be unary. */
12887 static bool
12889 {
12894 }
12896 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
12897 errors are issued for invalid declarations. */
12899 bool
12901 {
12903 tree argtype;
12909 tree class_type;
12911 /* Count the number of arguments and check for ellipsis. */
12924 else
12925 {
12926 /* It'd be nice to hang something else of the identifier to
12927 find CODE more directly. */
12933 ;
12934 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, KIND) \
12935 else if (assign_op == (KIND == cik_assign_op) \
12936 && oni[int (CODE)].identifier == name) \
12937 operator_code = (CODE);
12939 #undef DEF_OPERATOR
12940 else
12942 }
12949 {
12968 }
12970 /* [basic.std.dynamic.allocation]/1:
12972 A program is ill-formed if an allocation function is declared
12973 in a namespace scope other than global scope or declared static
12974 in global scope.
12976 The same also holds true for deallocation functions. */
12979 {
12981 {
12983 {
12986 }
12988 {
12991 }
12992 }
12993 }
12996 {
12999 }
13002 else
13003 {
13004 /* An operator function must either be a non-static member function
13005 or have at least one parameter of a class, a reference to a class,
13006 an enumeration, or a reference to an enumeration. 13.4.0.6 */
13008 {
13014 {
13017 }
13018 else
13019 {
13020 tree p;
13023 {
13027 }
13030 {
13035 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
13036 because these checks are performed even on
13037 template functions. */
13041 }
13044 {
13049 }
13050 }
13051 }
13053 /* There are no restrictions on the arguments to an overloaded
13054 "operator ()". */
13058 /* Warn about conversion operators that will never be used. */
13061 && warn_conversion
13062 /* Warn only declaring the function; there is no need to
13063 warn again about out-of-class definitions. */
13065 {
13074 ref
13080 {
13083 ref
13088 /* Don't force t to be complete here. */
13093 ref
13098 }
13100 }
13103 {
13104 /* 13.4.0.3 */
13107 }
13109 {
13112 }
13114 {
13116 /* We pick the one-argument operator codes by default, so
13117 we don't have to change anything. */
13118 ;
13120 {
13121 /* If we thought this was a unary operator, we now know
13122 it to be a binary operator. */
13124 {
13151 }
13157 && ! processing_template_decl
13159 {
13162 decl);
13163 else
13167 }
13168 }
13169 else
13170 {
13173 else
13176 }
13178 /* More Effective C++ rule 6. */
13184 {
13192 {
13195 arg))
13198 }
13199 else
13200 {
13203 }
13204 }
13205 }
13207 {
13209 {
13212 else
13215 }
13216 }
13218 {
13220 {
13223 else
13226 }
13228 /* More Effective C++ rule 7. */
13234 decl);
13235 }
13237 /* Effective C++ rule 23. */
13249 /* [over.oper]/8 */
13253 {
13257 {
13259 decl);
13260 }
13261 else
13262 {
13265 }
13266 }
13267 }
13269 }
13270 \f
13271 /* Return a string giving the keyword associate with CODE. */
13275 {
13277 {
13290 }
13291 }
13293 /* Name lookup in an elaborated-type-specifier (after the keyword
13294 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
13295 elaborated-type-specifier is invalid, issue a diagnostic and return
13296 error_mark_node; otherwise, return the *_TYPE to which it referred.
13297 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
13299 tree
13301 tree decl,
13303 {
13304 tree type;
13306 /* In the case of:
13308 struct S { struct S *p; };
13310 name lookup will find the TYPE_DECL for the implicit "S::S"
13311 typedef. Adjust for that here. */
13317 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
13318 is false for this case as well. */
13320 {
13324 }
13325 /* Accept template template parameters. */
13329 ;
13330 /* [dcl.type.elab]
13332 If the identifier resolves to a typedef-name or the
13333 simple-template-id resolves to an alias template
13334 specialization, the elaborated-type-specifier is ill-formed.
13336 In other words, the only legitimate declaration to use in the
13337 elaborated type specifier is the implicit typedef created when
13338 the type is declared. */
13342 {
13346 else
13351 }
13356 {
13360 }
13363 {
13367 }
13371 {
13372 /* If a class template appears as elaborated type specifier
13373 without a template header such as:
13375 template <class T> class C {};
13376 void f(class C); // No template header here
13378 then the required template argument is missing. */
13383 }
13386 }
13388 /* Lookup NAME in elaborate type specifier in scope according to
13389 SCOPE and issue diagnostics if necessary.
13390 Return *_TYPE node upon success, NULL_TREE when the NAME is not
13391 found, and ERROR_MARK_NODE for type error. */
13393 static tree
13396 {
13397 tree t;
13398 tree decl;
13400 {
13401 /* First try ordinary name lookup, ignoring hidden class name
13402 injected via friend declaration. */
13405 /* If that fails, the name will be placed in the smallest
13406 non-class, non-function-prototype scope according to 3.3.1/5.
13407 We may already have a hidden name declared as friend in this
13408 scope. So lookup again but not ignoring hidden names.
13409 If we find one, that name will be made visible rather than
13410 creating a new tag. */
13413 }
13414 else
13419 /* If scope is ts_current we're defining a class, so ignore a
13420 template template parameter. */
13426 {
13427 /* Look for invalid nested type:
13428 class C {
13429 class C {};
13430 }; */
13432 {
13435 decl);
13437 }
13439 /* Two cases we need to consider when deciding if a class
13440 template is allowed as an elaborated type specifier:
13441 1. It is a self reference to its own class.
13442 2. It comes with a template header.
13444 For example:
13446 template <class T> class C {
13447 class C *c1; // DECL_SELF_REFERENCE_P is true
13448 class D;
13449 };
13450 template <class U> class C; // template_header_p is true
13451 template <class T> class C<T>::D {
13452 class C *c2; // DECL_SELF_REFERENCE_P is true
13453 }; */
13456 decl,
13457 template_header_p
13462 {
13471 }
13474 }
13476 {
13480 }
13481 else
13483 }
13485 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
13486 Define the tag as a forward-reference if it is not defined.
13488 If a declaration is given, process it here, and report an error if
13489 multiple declarations are not identical.
13491 SCOPE is TS_CURRENT when this is also a definition. Only look in
13492 the current frame for the name (since C++ allows new names in any
13493 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
13494 declaration. Only look beginning from the current scope outward up
13495 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
13497 TEMPLATE_HEADER_P is true when this declaration is preceded by
13498 a set of template parameters. */
13500 static tree
13503 {
13510 {
13523 }
13525 /* In case of anonymous name, xref_tag is only called to
13526 make type node and push name. Name lookup is not required. */
13537 {
13541 /* Since SCOPE is not TS_CURRENT, we are not looking at a
13542 definition of this tag. Since, in addition, we are currently
13543 processing a (member) template declaration of a template
13544 class, we must be very careful; consider:
13546 template <class X>
13547 struct S1
13549 template <class U>
13550 struct S2
13551 { template <class V>
13552 friend struct S1; };
13554 Here, the S2::S1 declaration should not be confused with the
13555 outer declaration. In particular, the inner version should
13556 have a template parameter of level 2, not level 1. This
13557 would be particularly important if the member declaration
13558 were instead:
13560 template <class V = U> friend struct S1;
13562 say, when we should tsubst into `U' when instantiating
13563 S2. On the other hand, when presented with:
13565 template <class T>
13566 struct S1 {
13567 template <class U>
13568 struct S2 {};
13569 template <class U>
13570 friend struct S2;
13571 };
13573 we must find the inner binding eventually. We
13574 accomplish this by making sure that the new type we
13575 create to represent this declaration has the right
13576 TYPE_CONTEXT. */
13579 }
13582 {
13583 /* If no such tag is yet defined, create a forward-reference node
13584 and record it as the "definition".
13585 When a real declaration of this type is found,
13586 the forward-reference will be altered into a real type. */
13588 {
13591 }
13592 else
13593 {
13597 /* Mark it as a lambda type. */
13600 }
13601 }
13602 else
13603 {
13605 {
13606 /* Check that we aren't trying to overload a class with different
13607 constraints. */
13610 {
13613 }
13616 }
13620 {
13624 }
13626 /* Make injected friend class visible. */
13628 {
13635 {
13639 }
13640 }
13641 }
13644 }
13646 /* Wrapper for xref_tag_1. */
13648 tree
13651 {
13652 tree ret;
13658 }
13661 tree
13663 {
13668 else
13675 }
13677 /* Create the binfo hierarchy for REF with (possibly NULL) base list
13678 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
13679 access_* node, and the TREE_VALUE is the type of the base-class.
13680 Non-NULL TREE_TYPE indicates virtual inheritance. */
13682 void
13684 {
13691 tree default_access;
13697 /* The base of a derived class is private by default, all others are
13698 public. */
13703 /* First, make sure that any templates in base-classes are
13704 instantiated. This ensures that if we call ourselves recursively
13705 we do not get confused about which classes are marked and which
13706 are not. */
13709 {
13712 /* The dependent_type_p call below should really be dependent_scope_p
13713 so that we give a hard error about using an incomplete type as a
13714 base, but we allow it with a pedwarn for backward
13715 compatibility. */
13721 /* An incomplete type. Remove it from the list. */
13723 else
13724 {
13725 max_bases++;
13727 max_dvbases++;
13731 }
13732 }
13737 /* The binfo slot should be empty, unless this is an (ill-formed)
13738 redefinition. */
13749 /* Apply base-class info set up to the variants of this type. */
13753 {
13755 /* A C++98 POD cannot have base classes. */
13760 }
13767 {
13768 /* An aggregate can't have virtual base classes. */
13776 }
13779 {
13787 /* Before C++17, an aggregate cannot have base classes. In C++17, an
13788 aggregate can't have virtual, private, or protected base classes. */
13799 {
13801 basetype);
13803 }
13807 {
13809 /* The original basetype could have been a typedef'd type. */
13812 /* Inherit flags from the base. */
13823 }
13825 /* We must do this test after we've seen through a typedef
13826 type. */
13828 {
13831 else
13834 }
13837 /* Regenerate the pack expansion for the bases. */
13851 dropped_base:
13852 /* Update max_vbases to reflect the reality that we are dropping
13853 this base: if it reaches zero we want to undo the vec_alloc
13854 above to avoid inconsistencies during error-recovery: eg, in
13855 build_special_member_call, CLASSTYPE_VBASECLASSES non null
13856 and vtt null (c++/27952). */
13858 max_vbases--;
13860 max_vbases
13862 }
13869 /* If we didn't get max_vbases vbases, we must have shared at
13870 least one of them, and are therefore diamond shaped. */
13873 /* Unmark all the types. */
13878 /* Now see if we have a repeated base type. */
13880 {
13883 {
13885 {
13888 }
13890 }
13895 else
13897 }
13898 }
13900 \f
13901 /* Copies the enum-related properties from type SRC to type DST.
13902 Used with the underlying type of an enum and the enum itself. */
13903 static void
13905 {
13906 tree t;
13908 {
13918 else
13922 }
13923 }
13925 /* Begin compiling the definition of an enumeration type.
13926 NAME is its name,
13928 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
13930 UNDERLYING_TYPE is the type that will be used as the storage for
13931 the enumeration type. This should be NULL_TREE if no storage type
13932 was specified.
13934 ATTRIBUTES are any attributes specified after the enum-key.
13936 SCOPED_ENUM_P is true if this is a scoped enumeration type.
13938 if IS_NEW is not NULL, gets TRUE iff a new type is created.
13940 Returns the type object, as yet incomplete.
13941 Also records info about it so that build_enumerator
13942 may be used to declare the individual values as they are read. */
13944 tree
13947 {
13953 /* [C++0x dcl.enum]p5:
13955 If not explicitly specified, the underlying type of a scoped
13956 enumeration type is int. */
13963 /* If this is the real definition for a previous forward reference,
13964 fill in the contents in the same object that used to be the
13965 forward reference. */
13971 /* In case of a template_decl, the only check that should be deferred
13972 to instantiation time is the comparison of underlying types. */
13974 {
13976 {
13982 }
13984 {
13990 }
13996 {
14002 }
14003 }
14007 {
14008 /* In case of error, make a dummy enum to allow parsing to
14009 continue. */
14011 {
14014 }
14016 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
14017 of an opaque enum, or an opaque enum of an already defined
14018 enumeration (C++0x only).
14019 In any other case, it'll be NULL_TREE. */
14021 {
14024 }
14027 /* Do not push the decl more than once, unless we need to
14028 compare underlying types at instantiation time */
14031 || (underlying_type
14035 {
14039 /* std::byte aliases anything. */
14044 }
14045 else
14052 /* The enum is considered opaque until the opening '{' of the
14053 enumerator list. */
14056 }
14063 {
14065 /* We already checked that it matches, don't change it to a different
14068 {
14071 }
14074 else
14077 }
14079 /* If into a template class, the returned enum is always the first
14080 declaration (opaque or not) seen. This way all the references to
14081 this type will be to the same declaration. The following ones are used
14082 only to check for definition errors. */
14085 else
14087 }
14089 /* After processing and defining all the values of an enumeration type,
14090 install their decls in the enumeration type.
14091 ENUMTYPE is the type object. */
14093 void
14095 {
14096 tree values;
14097 tree underlying_type;
14098 tree decl;
14099 tree value;
14101 tree t;
14103 bool fixed_underlying_type_p
14106 /* We built up the VALUES in reverse order. */
14109 /* For an enum defined in a template, just set the type of the values;
14110 all further processing is postponed until the template is
14111 instantiated. We need to set the type so that tsubst of a CONST_DECL
14112 works. */
14114 {
14116 values;
14120 }
14122 /* Determine the minimum and maximum values of the enumerators. */
14124 {
14128 values;
14130 {
14133 /* [dcl.enum]: Following the closing brace of an enum-specifier,
14134 each enumerator has the type of its enumeration. Prior to the
14135 closing brace, the type of each enumerator is the type of its
14136 initializing value. */
14139 /* Update the minimum and maximum values, if appropriate. */
14143 /* Figure out what the minimum and maximum values of the
14144 enumerators are. */
14151 }
14152 }
14153 else
14154 /* [dcl.enum]
14156 If the enumerator-list is empty, the underlying type is as if
14157 the enumeration had a single enumerator with value 0. */
14161 {
14162 /* Compute the number of bits require to represent all values of the
14163 enumeration. We must do this before the type of MINNODE and
14164 MAXNODE are transformed, since tree_int_cst_min_precision relies
14165 on the TREE_TYPE of the value it is passed. */
14173 /* Determine the underlying type of the enumeration.
14175 [dcl.enum]
14177 The underlying type of an enumeration is an integral type that
14178 can represent all the enumerator values defined in the
14179 enumeration. It is implementation-defined which integral type is
14180 used as the underlying type for an enumeration except that the
14181 underlying type shall not be larger than int unless the value of
14182 an enumerator cannot fit in an int or unsigned int.
14184 We use "int" or an "unsigned int" as the underlying type, even if
14185 a smaller integral type would work, unless the user has
14186 explicitly requested that we use the smallest possible type. The
14187 user can request that for all enumerations with a command line
14188 flag, or for just one enumeration with an attribute. */
14190 use_short_enum = flag_short_enums
14193 /* If the precision of the type was specified with an attribute and it
14194 was too small, give an error. Otherwise, use it. */
14196 {
14199 else
14200 {
14203 }
14204 }
14208 itk++)
14209 {
14215 }
14217 {
14218 /* DR 377
14220 IF no integral type can represent all the enumerator values, the
14221 enumeration is ill-formed. */
14226 }
14228 /* [dcl.enum]
14230 The value of sizeof() applied to an enumeration type, an object
14231 of an enumeration type, or an enumerator, is the value of sizeof()
14232 applied to the underlying type. */
14235 /* Compute the minimum and maximum values for the type.
14237 [dcl.enum]
14239 For an enumeration where emin is the smallest enumerator and emax
14240 is the largest, the values of the enumeration are the values of the
14241 underlying type in the range bmin to bmax, where bmin and bmax are,
14242 respectively, the smallest and largest values of the smallest bit-
14243 field that can store emin and emax. */
14245 /* The middle-end currently assumes that types with TYPE_PRECISION
14246 narrower than their underlying type are suitably zero or sign
14247 extended to fill their mode. Similarly, it assumes that the front
14248 end assures that a value of a particular type must be within
14249 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
14251 We used to set these fields based on bmin and bmax, but that led
14252 to invalid assumptions like optimizing away bounds checking. So
14253 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
14254 TYPE_MAX_VALUE to the values for the mode above and only restrict
14255 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
14259 set_min_and_max_values_for_integral_type
14262 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
14265 }
14266 else
14269 /* Convert each of the enumerators to the type of the underlying
14270 type of the enumeration. */
14272 {
14273 location_t saved_location;
14279 /* If the enumeration type has a fixed underlying type, we
14280 already checked all of the enumerator values. */
14282 else
14285 tf_warning_or_error);
14288 /* Do not clobber shared ints. */
14290 {
14294 }
14296 }
14298 /* Fix up all variant types of this enum type. */
14305 {
14307 current_class_type);
14309 }
14311 /* Finish debugging output for this type. */
14314 /* Each enumerator now has the type of its enumeration. Clear the cache
14315 so that this change in types doesn't confuse us later on. */
14317 }
14319 /* Finishes the enum type. This is called only the first time an
14320 enumeration is seen, be it opaque or odinary.
14321 ENUMTYPE is the type object. */
14323 void
14325 {
14327 {
14331 }
14333 /* If this is a forward declaration, there should not be any variants,
14334 though we can get a variant in the middle of an enum-specifier with
14335 wacky code like 'enum E { e = sizeof(const E*) };' */
14339 }
14341 /* Build and install a CONST_DECL for an enumeration constant of the
14342 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
14343 Apply ATTRIBUTES if available. LOC is the location of NAME.
14344 Assignment of sequential values by default is handled here. */
14346 void
14348 location_t loc)
14349 {
14350 tree decl;
14351 tree context;
14352 tree type;
14354 /* scalar_constant_value will pull out this expression, so make sure
14355 it's folded as appropriate. */
14359 /* If the VALUE was erroneous, pretend it wasn't there; that will
14360 result in the enum being assigned the next value in sequence. */
14364 /* Remove no-op casts from the value. */
14369 {
14370 /* Validate and default VALUE. */
14372 {
14374 {
14379 }
14382 value = perform_implicit_conversion_flags
14390 {
14393 {
14397 }
14398 else
14399 {
14403 {
14407 }
14408 }
14409 }
14410 }
14412 /* Default based on previous value. */
14414 {
14416 {
14417 tree prev_value;
14420 /* C++03 7.2/4: If no initializer is specified for the first
14421 enumerator, the type is an unspecified integral
14422 type. Otherwise the type is the same as the type of the
14423 initializing value of the preceding enumerator unless the
14424 incremented value is not representable in that type, in
14425 which case the type is an unspecified integral type
14426 sufficient to contain the incremented value. */
14430 else
14431 {
14437 {
14440 {
14443 {
14449 }
14456 }
14459 else
14461 }
14464 {
14467 }
14468 }
14469 }
14470 else
14472 }
14474 /* Remove no-op casts from the value. */
14477 /* If the underlying type of the enum is fixed, check whether
14478 the enumerator values fits in the underlying type. If it
14479 does not fit, the program is ill-formed [C++0x dcl.enum]. */
14481 && value
14483 {
14488 /* Convert the value to the appropriate type. */
14490 }
14491 }
14493 /* C++ associates enums with global, function, or class declarations. */
14496 /* Build the actual enumeration constant. Note that the enumeration
14497 constants have the underlying type of the enum (if it is fixed)
14498 or the type of their initializer (if the underlying type of the
14499 enum is not fixed):
14501 [ C++0x dcl.enum ]
14503 If the underlying type is fixed, the type of each enumerator
14504 prior to the closing brace is the underlying type; if the
14505 initializing value of an enumerator cannot be represented by
14506 the underlying type, the program is ill-formed. If the
14507 underlying type is not fixed, the type of each enumerator is
14508 the type of its initializing value.
14510 If the underlying type is not fixed, it will be computed by
14511 finish_enum and we will reset the type of this enumerator. Of
14512 course, if we're processing a template, there may be no value. */
14526 {
14527 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
14528 on the TYPE_FIELDS list for `S'. (That's so that you can say
14529 things like `S::i' later.) */
14531 /* The enumerator may be getting declared outside of its enclosing
14532 class, like so:
14534 class S { public: enum E : int; }; enum S::E : int { i = 7; };
14536 For which case we need to make sure that the access of `S::i'
14537 matches the access of `S::E'. */
14543 else
14549 }
14550 else
14553 /* Add this enumeration constant to the list for this type. */
14555 }
14557 /* Look for an enumerator with the given NAME within the enumeration
14558 type ENUMTYPE. This routine is used primarily for qualified name
14559 lookup into an enumerator in C++0x, e.g.,
14561 enum class Color { Red, Green, Blue };
14563 Color color = Color::Red;
14565 Returns the value corresponding to the enumerator, or
14566 NULL_TREE if no such enumerator was found. */
14567 tree
14569 {
14570 tree e;
14575 }
14577 \f
14578 /* We're defining DECL. Make sure that its type is OK. */
14580 static void
14582 {
14586 /* In a function definition, arg types must be complete. */
14593 {
14598 /* Make it return void instead. */
14601 void_type_node,
14603 else
14605 fntype
14608 fntype = (cp_build_type_attribute_variant
14611 }
14612 else
14613 {
14617 }
14618 }
14620 /* True iff FN is an implicitly-defined default constructor. */
14622 static bool
14624 {
14628 }
14630 /* Clobber the contents of *this to let the back end know that the object
14631 storage is dead when we enter the constructor or leave the destructor. */
14633 static tree
14635 {
14636 /* Clobbering an empty base is pointless, and harmful if its one byte
14637 TYPE_SIZE overlays real data. */
14641 /* If we have virtual bases, clobber the whole object, but only if we're in
14642 charge. If we don't have virtual bases, clobber the as-base type so we
14643 don't mess with tail padding. */
14655 {
14658 }
14665 }
14667 /* Create the FUNCTION_DECL for a function definition.
14668 DECLSPECS and DECLARATOR are the parts of the declaration;
14669 they describe the function's name and the type it returns,
14670 but twisted together in a fashion that parallels the syntax of C.
14672 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
14673 DECLARATOR is really the DECL for the function we are about to
14674 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
14675 indicating that the function is an inline defined in-class.
14677 This function creates a binding context for the function body
14678 as well as setting up the FUNCTION_DECL in current_function_decl.
14680 For C++, we must first check whether that datum makes any sense.
14681 For example, "class A local_a(1,2);" means that variable local_a
14682 is an aggregate of type A, which should have a constructor
14683 applied to it with the argument list [1, 2].
14685 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
14686 or may be a BLOCK if the function has been defined previously
14687 in this translation unit. On exit, DECL_INITIAL (decl1) will be
14688 error_mark_node if the function has never been defined, or
14689 a BLOCK if the function has been defined somewhere. */
14691 bool
14693 {
14695 tree fntype;
14696 tree restype;
14699 tree current_function_parms;
14704 /* Sanity check. */
14712 /* ISO C++ 11.4/5. A friend function defined in a class is in
14713 the (lexical) scope of the class in which it is defined. */
14715 {
14718 /* CTYPE could be null here if we're dealing with a template;
14719 for example, `inline friend float foo()' inside a template
14720 will have no CTYPE set. */
14723 else
14725 }
14732 /* Handle gnu_inline attribute. */
14734 {
14739 }
14742 /* This is a constructor, we must ensure that any default args
14743 introduced by this definition are propagated to the clones
14744 now. The clones are used directly in overload resolution. */
14747 /* Sometimes we don't notice that a function is a static member, and
14748 build a METHOD_TYPE for it. Fix that up now. */
14752 /* Set up current_class_type, and enter the scope of the class, if
14753 appropriate. */
14759 /* Now that we have entered the scope of the class, we must restore
14760 the bindings for any template parameters surrounding DECL1, if it
14761 is an inline member template. (Order is important; consider the
14762 case where a template parameter has the same name as a field of
14763 the class.) It is not until after this point that
14764 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
14768 /* Effective C++ rule 15. */
14774 /* Make the init_value nonzero so pushdecl knows this is not tentative.
14775 error_mark_node is replaced below (in poplevel) with the BLOCK. */
14779 /* This function exists in static storage.
14780 (This does not mean `static' in the C sense!) */
14783 /* We must call push_template_decl after current_class_type is set
14784 up. (If we are processing inline definitions after exiting a
14785 class scope, current_class_type will be NULL_TREE until set above
14786 by push_nested_class.) */
14788 {
14791 {
14795 }
14797 }
14799 /* Make sure the parameter and return types are reasonable. When
14800 you declare a function, these types can be incomplete, but they
14801 must be complete when you define the function. */
14804 /* Build the return declaration for the function. */
14808 {
14809 tree resdecl;
14817 }
14819 /* Record the decl so that the function name is defined.
14820 If we already have a decl for this name, and it is a FUNCTION_DECL,
14821 use the old decl. */
14823 {
14824 /* A specialization is not used to guide overload resolution. */
14828 {
14832 /* If something went wrong when registering the declaration,
14833 use DECL1; we have to have a FUNCTION_DECL to use when
14834 parsing the body of the function. */
14835 ;
14836 else
14837 {
14838 /* Otherwise, OLDDECL is either a previous declaration
14839 of the same function or DECL1 itself. */
14846 {
14847 tree context;
14849 /* Check whether DECL1 is in an anonymous
14850 namespace. */
14852 context;
14854 {
14858 }
14862 OPT_Wmissing_declarations,
14864 }
14867 }
14868 }
14869 else
14870 {
14871 /* We need to set the DECL_CONTEXT. */
14874 }
14878 /* If #pragma weak applies, mark the decl appropriately now.
14879 The pragma only applies to global functions. Because
14880 determining whether or not the #pragma applies involves
14881 computing the mangled name for the declaration, we cannot
14882 apply the pragma until after we have merged this declaration
14883 with any previous declarations; if the original declaration
14884 has a linkage specification, that specification applies to
14885 the definition as well, and may affect the mangled name. */
14888 }
14890 /* We are now in the scope of the function being defined. */
14893 /* Save the parm names or decls from this function's declarator
14894 where store_parm_decls will find them. */
14897 /* Let the user know we're compiling this function. */
14902 /* This function may already have been parsed, in which case just
14903 return; our caller will skip over the body without parsing. */
14907 /* Initialize RTL machinery. We cannot do this until
14908 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
14909 even when processing a template; this is how we get
14910 CFUN set up, and our per-function variables initialized.
14911 FIXME factor out the non-RTL stuff. */
14915 /* Initialize the language data structures. Whenever we start
14916 a new function, we destroy temporaries in the usual way. */
14922 {
14925 }
14927 /* Start the statement-tree, start the tree now. */
14930 /* If we are (erroneously) defining a function that we have already
14931 defined before, wipe out what we knew before. */
14936 {
14937 /* We know that this was set up by `grokclassfn'. We do not
14938 wait until `store_parm_decls', since evil parse errors may
14939 never get us to that point. Here we keep the consistency
14940 between `current_class_type' and `current_class_ptr'. */
14946 cp_function_chain->x_current_class_ref
14948 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
14951 /* Constructors and destructors need to know whether they're "in
14952 charge" of initializing virtual base classes. */
14955 {
14958 }
14960 {
14963 }
14964 }
14967 /* Implicitly-defined methods (like the
14968 destructor for a class in which no destructor
14969 is explicitly declared) must not be defined
14970 until their definition is needed. So, we
14971 ignore interface specifications for
14972 compiler-generated functions. */
14978 {
14985 /* This is a function in a local class in an extern inline
14986 or template function. */
14988 }
14989 /* If this function belongs to an interface, it is public.
14990 If it belongs to someone else's interface, it is also external.
14991 This only affects inlines and template instantiations. */
14993 {
14996 {
15000 && ! flag_implement_inlines
15003 /* For WIN32 we also want to put these in linkonce sections. */
15005 }
15006 else
15009 /* If this function is in an interface implemented in this file,
15010 make sure that the back end knows to emit this function
15011 here. */
15014 }
15017 {
15018 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
15019 interface, we will have both finfo->interface_unknown and
15020 finfo->interface_only set. In that case, we don't want to
15021 use the normal heuristics because someone will supply a
15022 #pragma implementation elsewhere, and deducing it here would
15023 produce a conflict. */
15028 }
15029 else
15030 {
15031 /* This is a definition, not a reference.
15032 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
15040 else
15042 }
15044 /* Determine the ELF visibility attribute for the function. We must not
15045 do this before calling "pushdecl", as we must allow "duplicate_decls"
15046 to merge any attributes appropriately. We also need to wait until
15047 linkage is set. */
15071 /* Clobbering an empty base is harmful if it overlays real data. */
15073 /* We can't clobber safely for an implicitly-defined default constructor
15074 because part of the initialization might happen before we enter the
15075 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
15087 }
15090 /* Like start_preparsed_function, except that instead of a
15091 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
15093 Returns true on success. If the DECLARATOR is not suitable
15094 for a function, we return false, which tells the parser to
15095 skip the entire function. */
15097 bool
15100 tree attrs)
15101 {
15102 tree decl1;
15108 /* If the declarator is not suitable for a function definition,
15109 cause a syntax error. */
15111 {
15114 }
15117 /* main must return int. grokfndecl should have corrected it
15118 (and issued a diagnostic) if the user got it wrong. */
15120 integer_type_node));
15123 }
15124 \f
15125 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
15126 FN. */
15128 static bool
15130 {
15132 && !processing_template_decl
15134 /* We insert the EH_SPEC_BLOCK only in the original
15135 function; then, it is copied automatically to the
15136 clones. */
15138 /* Implicitly-generated constructors and destructors have
15139 exception specifications. However, those specifications
15140 are the union of the possible exceptions specified by the
15141 constructors/destructors for bases and members, so no
15142 unallowed exception will ever reach this function. By
15143 not creating the EH_SPEC_BLOCK we save a little memory,
15144 and we avoid spurious warnings about unreachable
15145 code. */
15147 }
15149 /* Store the parameter declarations into the current function declaration.
15150 This is called after parsing the parameter declarations, before
15151 digesting the body of the function.
15153 Also install to binding contour return value identifier, if any. */
15155 static void
15157 {
15159 tree parm;
15161 /* This is a chain of any other decls that came in among the parm
15162 declarations. If a parm is declared with enum {foo, bar} x;
15163 then CONST_DECLs for foo and bar are put here. */
15167 {
15168 /* This case is when the function was defined with an ANSI prototype.
15169 The parms already have decls, so we need not do anything here
15170 except record them as in effect
15171 and complain if any redundant old-style parm decls were written. */
15174 tree next;
15176 /* Must clear this because it might contain TYPE_DECLs declared
15177 at class level. */
15180 /* If we're doing semantic analysis, then we'll call pushdecl
15181 for each of these. We must do them in reverse order so that
15182 they end in the correct forward order. */
15186 {
15190 else
15191 {
15192 /* If we find an enum constant or a type tag,
15193 put it aside for the moment. */
15196 }
15197 }
15199 /* Get the decls in their original chain order and record in the
15200 function. This is all and only the PARM_DECLs that were
15201 pushed into scope by the loop above. */
15203 }
15204 else
15207 /* Now store the final chain of decls for the arguments
15208 as the decl-chain of the current lexical scope.
15209 Put the enumerators in as well, at the front so that
15210 DECL_ARGUMENTS is not modified. */
15215 }
15217 \f
15218 /* We have finished doing semantic analysis on DECL, but have not yet
15219 generated RTL for its body. Save away our current state, so that
15220 when we want to generate RTL later we know what to do. */
15222 static void
15224 {
15227 /* Save the language-specific per-function data so that we can
15228 get it back when we really expand this function. */
15231 /* Make a copy. */
15236 /* Clear out the bits we don't need. */
15241 }
15244 /* Set the return value of the constructor (if present). */
15246 static void
15248 {
15249 tree val;
15250 tree exprstmt;
15253 {
15254 /* Any return from a constructor will end up here. */
15260 /* Return the address of the object. */
15263 }
15264 }
15266 /* Do all the processing for the beginning of a destructor; set up the
15267 vtable pointers and cleanups for bases and members. */
15269 static void
15271 {
15272 tree compound_stmt;
15274 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
15275 issued an error message. We still want to try to process the
15276 body of the function, but initialize_vtbl_ptrs will crash if
15277 TYPE_BINFO is NULL. */
15279 {
15281 /* Make all virtual function table pointers in non-virtual base
15282 classes point to CURRENT_CLASS_TYPE's virtual function
15283 tables. */
15288 /* Clobbering an empty base is harmful if it overlays real data. */
15292 /* And insert cleanups for our bases and members so that they
15293 will be properly destroyed if we throw. */
15295 }
15296 }
15298 /* At the end of every destructor we generate code to delete the object if
15299 necessary. Do that now. */
15301 static void
15303 {
15304 tree exprstmt;
15306 /* Any return from a destructor will end up here; that way all base
15307 and member cleanups will be run when the function returns. */
15311 {
15312 tree val;
15317 /* Return the address of the object. */
15320 }
15321 }
15323 /* Do the necessary processing for the beginning of a function body, which
15324 in this case includes member-initializers, but not the catch clauses of
15325 a function-try-block. Currently, this means opening a binding level
15326 for the member-initializers (in a ctor), member cleanups (in a dtor),
15327 and capture proxies (in a lambda operator()). */
15329 tree
15331 {
15332 tree stmt;
15339 else
15340 /* Always keep the BLOCK node associated with the outermost pair of
15341 curly braces of a function. These are needed for correct
15342 operation of dwarfout.c. */
15353 }
15355 /* Do the processing for the end of a function body. Currently, this means
15356 closing out the cleanups for fully-constructed bases and members, and in
15357 the case of the destructor, deleting the object if desired. Again, this
15358 is only meaningful for [cd]tors, since they are the only functions where
15359 there is a significant distinction between the main body and any
15360 function catch clauses. Handling, say, main() return semantics here
15361 would be wrong, as flowing off the end of a function catch clause for
15362 main() would also need to return 0. */
15364 void
15366 {
15370 /* Close the block. */
15379 }
15381 /* Given a function, returns the BLOCK corresponding to the outermost level
15382 of curly braces, skipping the artificial block created for constructor
15383 initializers. */
15385 tree
15387 {
15397 }
15399 /* If FNDECL is a class's key method, add the class to the list of
15400 keyed classes that should be emitted. */
15402 static void
15404 {
15408 {
15412 }
15413 }
15415 /* Subroutine of finish_function.
15416 Save the body of constexpr functions for possible
15417 future compile time evaluation. */
15419 static void
15421 {
15427 }
15429 /* Finish up a function declaration and compile that function
15430 all the way to assembler language output. The free the storage
15431 for the function definition.
15433 FLAGS is a bitwise or of the following values:
15434 2 - INCLASS_INLINE
15435 We just finished processing the body of an in-class inline
15436 function definition. (This processing will have taken place
15437 after the class definition is complete.) */
15439 tree
15441 {
15446 /* When we get some parse errors, we can end up without a
15447 current_function_decl, so cope. */
15458 /* TREE_READONLY (fndecl) = 1;
15459 This caused &foo to be of type ptr-to-const-function
15460 which then got a warning when stored in a ptr-to-function variable. */
15463 /* The current function is being defined, so its DECL_INITIAL should
15464 be set, and unless there's a multiple definition, it should be
15465 error_mark_node. */
15468 /* For a cloned function, we've already got all the code we need;
15469 there's no need to add any extra bits. */
15471 {
15472 /* Make it so that `main' always returns 0 by default. */
15479 current_eh_spec_block);
15480 }
15482 /* If we're saving up tree structure, tie off the function now. */
15490 /* If this function can't throw any exceptions, remember that. */
15493 && !flag_non_call_exceptions
15497 /* This must come after expand_function_end because cleanups might
15498 have declarations (from inline functions) that need to go into
15499 this function's blocks. */
15501 /* If the current binding level isn't the outermost binding level
15502 for this function, either there is a bug, or we have experienced
15503 syntax errors and the statement tree is malformed. */
15505 {
15506 /* Make sure we have already experienced errors. */
15509 /* Throw away the broken statement tree and extra binding
15510 levels. */
15514 {
15517 else
15519 }
15520 }
15523 /* Statements should always be full-expressions at the outermost set
15524 of curly braces for a function. */
15527 /* If there are no return statements in a function with auto return type,
15528 the return type is void. But if the declared type is something like
15529 auto*, this is an error. */
15532 {
15534 {
15537 }
15540 {
15542 current_function_auto_return_pattern);
15545 }
15546 }
15548 // If this is a concept, check that the definition is reasonable.
15552 /* Lambda closure members are implicitly constexpr if possible. */
15555 && (processing_template_decl
15560 /* Save constexpr function body before it gets munged by
15561 the NRV transformation. */
15564 /* Invoke the pre-genericize plugin before we start munging things. */
15568 /* Perform delayed folding before NRV transformation. */
15572 /* Set up the named return value optimization, if we can. Candidate
15573 variables are selected in check_return_expr. */
15575 {
15577 tree outer;
15580 /* This is only worth doing for fns that return in memory--and
15581 simpler, since we don't have to worry about promoted modes. */
15583 /* Only allow this for variables declared in the outer scope of
15584 the function so we know that their lifetime always ends with a
15585 return; see g++.dg/opt/nrv6.C. We could be more flexible if
15586 we were to do this optimization in tree-ssa. */
15592 }
15594 /* Remember that we were in class scope. */
15598 /* Must mark the RESULT_DECL as being in this function. */
15601 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
15602 to the FUNCTION_DECL node itself. */
15605 /* Save away current state, if appropriate. */
15609 /* Complain if there's just no return statement. */
15614 /* Don't complain if we abort or throw. */
15615 && !current_function_returns_abnormally
15616 /* Don't complain if there's an infinite loop. */
15617 && !current_function_infinite_loop
15618 /* Don't complain if we are declared noreturn. */
15622 /* Structor return values (if any) are set by the compiler. */
15626 {
15630 }
15632 /* Store the end of the function, so that we get good line number
15633 info for the epilogue. */
15636 /* Complain about parameters that are only set, but never otherwise used. */
15638 && !processing_template_decl
15641 {
15642 tree decl;
15645 decl;
15659 OPT_Wunused_but_set_parameter,
15662 }
15664 /* Complain about locally defined typedefs that are not used in this
15665 function. */
15668 /* Possibly warn about unused parameters. */
15670 && !processing_template_decl
15674 /* Genericize before inlining. */
15676 {
15679 /* Clear out the bits we don't need. */
15689 }
15690 /* Clear out the bits we don't need. */
15693 /* We're leaving the context of this function, so zap cfun. It's still in
15694 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
15698 /* If this is an in-class inline definition, we may have to pop the
15699 bindings for the template parameters that we added in
15700 maybe_begin_member_template_processing when start_function was
15701 called. */
15705 /* Leave the scope of the class. */
15711 /* Clean up. */
15716 }
15717 \f
15718 /* Create the FUNCTION_DECL for a function definition.
15719 DECLSPECS and DECLARATOR are the parts of the declaration;
15720 they describe the return type and the name of the function,
15721 but twisted together in a fashion that parallels the syntax of C.
15723 This function creates a binding context for the function body
15724 as well as setting up the FUNCTION_DECL in current_function_decl.
15726 Returns a FUNCTION_DECL on success.
15728 If the DECLARATOR is not suitable for a function (it defines a datum
15729 instead), we return 0, which tells yyparse to report a parse error.
15731 May return void_type_node indicating that this method is actually
15732 a friend. See grokfield for more details.
15734 Came here with a `.pushlevel' .
15736 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
15737 CHANGES TO CODE IN `grokfield'. */
15739 tree
15742 {
15750 {
15753 }
15758 /* Pass friends other than inline friend functions back. */
15763 {
15768 }
15777 /* We process method specializations in finish_struct_1. */
15779 {
15783 }
15786 {
15788 {
15791 }
15792 }
15798 }
15799 \f
15801 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
15802 we can lay it out later, when and if its type becomes complete.
15804 Also handle constexpr variables where the initializer involves
15805 an unlowered PTRMEM_CST because the class isn't complete yet. */
15807 void
15809 {
15812 /* Keep track of variables with incomplete types. */
15815 {
15823 /* RTTI TD entries are created while defining the type_info. */
15826 {
15829 }
15833 {
15834 /* When the outermost open class is complete we can resolve any
15835 pointers-to-members. */
15839 }
15840 }
15841 }
15843 /* Called when a class type (given by TYPE) is defined. If there are
15844 any existing VAR_DECLs whose type has been completed by this
15845 declaration, update them now. */
15847 void
15849 {
15854 {
15856 {
15863 {
15864 /* Complete the type of the variable. The VAR_DECL itself
15865 will be laid out in expand_expr. */
15868 }
15870 /* Remove this entry from the list. */
15872 }
15873 else
15874 ix++;
15875 }
15877 /* Check for pending declarations which may have abstract type. */
15879 }
15881 /* If DECL is of a type which needs a cleanup, build and return an
15882 expression to perform that cleanup here. Return NULL_TREE if no
15883 cleanup need be done. DECL can also be a _REF when called from
15884 split_nonconstant_init_1. */
15886 tree
15888 {
15889 tree type;
15890 tree attr;
15891 tree cleanup;
15893 /* Assume no cleanup is required. */
15899 /* Handle "__attribute__((cleanup))". We run the cleanup function
15900 before the destructor since the destructor is what actually
15901 terminates the lifetime of the object. */
15904 else
15907 {
15908 tree id;
15909 tree fn;
15910 tree arg;
15912 /* Get the name specified by the user for the cleanup function. */
15914 /* Look up the name to find the cleanup function to call. It is
15915 important to use lookup_name here because that is what is
15916 used in c-common.c:handle_cleanup_attribute when performing
15917 initial checks on the attribute. Note that those checks
15918 include ensuring that the function found is not an overloaded
15919 function, or an object with an overloaded call operator,
15920 etc.; we can rely on the fact that the function found is an
15921 ordinary FUNCTION_DECL. */
15929 }
15930 /* Handle ordinary C++ destructors. */
15933 {
15935 tree addr;
15936 tree call;
15940 else
15951 else
15953 }
15955 /* build_delete sets the location of the destructor call to the
15956 current location, even though the destructor is going to be
15957 called later, at the end of the current scope. This can lead to
15958 a "jumpy" behavior for users of debuggers when they step around
15959 the end of the block. So let's unset the location of the
15960 destructor call instead. */
15966 /* Treat objects with destructors as used; the destructor may do
15967 something substantive. */
15972 }
15974 \f
15975 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
15976 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
15977 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
15979 tree
15981 {
15982 tree fntype;
15983 tree args;
15997 fntype = (cp_build_type_attribute_variant
15999 fntype = (build_exception_variant
16004 }
16006 /* DECL was originally constructed as a non-static member function,
16007 but turned out to be static. Update it accordingly. */
16009 void
16011 {
16024 }
16026 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
16027 one of the language-independent trees. */
16029 enum cp_tree_node_structure_enum
16031 {
16033 {
16050 }
16051 }
16053 /* Build the void_list_node (void_type_node having been created). */
16054 tree
16056 {
16059 }
16061 bool
16063 {
16064 /* A missing noreturn is ok for the `main' function. */
16066 }
16068 /* Return the decl used to identify the COMDAT group into which DECL should
16069 be placed. */
16071 tree
16073 {
16074 /* Virtual tables, construction virtual tables, and virtual table
16075 tables all go in a single COMDAT group, named after the primary
16076 virtual table. */
16079 /* For all other DECLs, the COMDAT group is the mangled name of the
16080 declaration itself. */
16081 else
16082 {
16084 {
16085 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
16086 into the same section as the target function. In that case
16087 we must return target's name. */
16093 else
16095 }
16096 }
16099 }
16101 /* Returns the return type for FN as written by the user, which may include
16102 a placeholder for a deduced return type. */
16104 tree
16106 {
16109 {
16116 }
16118 }
16120 /* Returns true iff DECL was declared with an auto type and it has
16121 not yet been deduced to a real type. */
16123 bool
16125 {
16129 }
16131 /* Complain if DECL has an undeduced return type. */
16133 bool
16135 {
16137 {
16141 }
16143 }