| blob | 121b4a4f0dbf5bd2c433fa0b1187c95bdf6a61e5 |
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 };
98 static tree check_special_function_return_type
106 /* The following symbols are subsumed in the cp_global_trees array, and
107 listed here individually for documentation purposes.
109 C++ extensions
110 tree wchar_decl_node;
112 tree vtable_entry_type;
113 tree delta_type_node;
114 tree __t_desc_type_node;
116 tree class_type_node;
117 tree unknown_type_node;
119 Array type `vtable_entry_type[]'
121 tree vtbl_type_node;
122 tree vtbl_ptr_type_node;
124 Namespaces,
126 tree std_node;
127 tree abi_node;
129 A FUNCTION_DECL which can call `abort'. Not necessarily the
130 one that the user will declare, but sufficient to be called
131 by routines that want to abort the program.
133 tree abort_fndecl;
135 Used by RTTI
136 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
137 tree tinfo_var_id; */
141 #define local_names cp_function_chain->x_local_names
143 /* A list of objects which have constructors or destructors
144 which reside in the global scope. The decl is stored in
145 the TREE_VALUE slot and the initializer is stored
146 in the TREE_PURPOSE slot. */
147 tree static_aggregates;
149 /* Like static_aggregates, but for thread_local variables. */
150 tree tls_aggregates;
152 /* -- end of C++ */
154 /* A node for the integer constant 2. */
156 tree integer_two_node;
158 /* vector of static decls. */
161 /* vector of keyed classes. */
164 /* Used only for jumps to as-yet undefined labels, since jumps to
165 defined labels can have their validity checked immediately. */
169 /* The binding level to which this entry is *currently* attached.
170 This is initially the binding level in which the goto appeared,
171 but is modified as scopes are closed. */
173 /* The head of the names list that was current when the goto appeared,
174 or the inner scope popped. These are the decls that will *not* be
175 skipped when jumping to the label. */
176 tree names_in_scope;
177 /* The location of the goto, for error reporting. */
178 location_t o_goto_locus;
179 /* True if an OpenMP structured block scope has been closed since
180 the goto appeared. This means that the branch from the label will
181 illegally exit an OpenMP scope. */
183 };
185 /* A list of all LABEL_DECLs in the function that have names. Here so
186 we can clear out their names' definitions at the end of the
187 function, and so we can check the validity of jumps to these labels. */
197 /* The binding level to which the label is *currently* attached.
198 This is initially set to the binding level in which the label
199 is defined, but is modified as scopes are closed. */
202 /* The head of the names list that was current when the label was
203 defined, or the inner scope popped. These are the decls that will
204 be skipped when jumping to the label. */
205 tree names_in_scope;
207 /* A vector of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
211 /* A list of uses of the label, before the label is defined. */
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a jump to the
216 label will illegally enter a scope of the given flavor. */
222 };
224 #define named_labels cp_function_chain->x_named_labels
225 \f
226 /* The number of function bodies which we are currently processing.
227 (Zero if we are at namespace scope, one inside the body of a
228 function, two inside the body of a function in a local class, etc.) */
231 /* Whether the exception-specifier is part of a function type (i.e. C++17). */
234 /* States indicating how grokdeclarator() should handle declspecs marked
235 with __attribute__((deprecated)). An object declared as
236 __attribute__((deprecated)) suppresses warnings of uses of other
237 deprecated items. */
240 \f
241 /* A list of VAR_DECLs whose type was incomplete at the time the
242 variable was declared. */
245 tree decl;
246 tree incomplete_type;
247 };
251 \f
252 /* Returns the kind of template specialization we are currently
253 processing, given that it's declaration contained N_CLASS_SCOPES
254 explicit scope qualifications. */
256 tmpl_spec_kind
258 {
264 /* Scan through the template parameter scopes. */
268 {
269 /* If we see a specialization scope inside a parameter scope,
270 then something is wrong. That corresponds to a declaration
271 like:
273 template <class T> template <> ...
275 which is always invalid since [temp.expl.spec] forbids the
276 specialization of a class member template if the enclosing
277 class templates are not explicitly specialized as well. */
279 {
282 else
284 }
289 }
291 /* Handle explicit instantiations. */
293 {
295 /* We've seen a template parameter list during an explicit
296 instantiation. For example:
298 template <class T> template void f(int);
300 This is erroneous. */
302 else
304 }
307 /* We've not seen enough template headers to match all the
308 specialized classes present. For example:
310 template <class T> void R<T>::S<T>::f(int);
312 This is invalid; there needs to be one set of template
313 parameters for each class. */
316 /* We're processing a non-template declaration (even though it may
317 be a member of a template class.) For example:
319 template <class T> void S<T>::f(int);
321 The `class T' matches the `S<T>', leaving no template headers
322 corresponding to the `f'. */
325 /* We've got too many template headers. For example:
327 template <> template <class T> void f (T);
329 There need to be more enclosing classes. */
331 else
332 /* This must be a template. It's of the form:
334 template <class T> template <class U> void S<T>::f(U);
336 This is a specialization if the innermost level was a
337 specialization; otherwise it's just a definition of the
338 template. */
340 }
342 /* Exit the current scope. */
344 void
346 {
348 }
350 /* When a label goes out of scope, check to see if that label was used
351 in a valid manner, and issue any appropriate warnings or errors. */
353 static void
355 {
357 {
359 {
360 location_t location;
364 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
365 /* Avoid crashing later. */
367 }
368 else
370 }
371 }
373 /* Helper function to sort named label entries in a vector by DECL_UID. */
375 static int
377 {
381 /* DECL_UIDs can never be equal. */
383 }
385 /* At the end of a function, all labels declared within the function
386 go out of scope. BLOCK is the top-level block for the
387 function. */
389 static void
391 {
395 /* We need to add the labels to the block chain, so debug
396 information is emitted. But, we want the order to be stable so
397 need to sort them first. Otherwise the debug output could be
398 randomly ordered. I guess it's mostly stable, unless the hash
399 table implementation changes. */
404 {
411 }
416 {
423 }
424 }
426 /* At the end of a block with local labels, restore the outer definition. */
428 static void
430 {
438 else
439 {
442 }
444 }
446 /* The following two routines are used to interface to Objective-C++.
447 The binding level is purposely treated as an opaque type. */
451 {
453 }
455 /* The following routine is used by the NeXT-style SJLJ exceptions;
456 variables get marked 'volatile' so as to not be clobbered by
457 _setjmp()/_longjmp() calls. All variables in the current scope,
458 as well as parent scopes up to (but not including) ENCLOSING_BLK
459 shall be thusly marked. */
461 void
463 {
469 {
470 tree decl;
475 /* Do not climb up past the current function. */
478 }
479 }
481 /* True if B is the level for the condition of a constexpr if. */
483 static bool
485 {
489 }
491 /* Update data for defined and undefined labels when leaving a scope. */
493 int
495 {
500 {
501 tree decl;
503 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
504 TREE_LISTs representing OVERLOADs, so be careful. */
514 {
533 }
534 }
536 {
541 {
546 }
547 }
550 }
552 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
553 when errors were reported, except for -Werror-unused-but-set-*. */
556 /* Exit a binding level.
557 Pop the level off, and restore the state of the identifier-decl mappings
558 that were in effect when this level was entered.
560 If KEEP == 1, this level had explicit declarations, so
561 and create a "block" (a BLOCK node) for the level
562 to record its declarations and subblocks for symbol table output.
564 If FUNCTIONBODY is nonzero, this level is the body of a function,
565 so create a block as if KEEP were set and also clear out all
566 label names.
568 If REVERSE is nonzero, reverse the order of decls before putting
569 them into the BLOCK. */
571 tree
573 {
574 tree link;
575 /* The chain of decls was accumulated in reverse order.
576 Put it into forward order, just for cleanliness. */
577 tree decls;
578 tree subblocks;
579 tree block;
580 tree decl;
582 scope_kind kind;
586 restart:
599 /* We used to use KEEP == 2 to indicate that the new block should go
600 at the beginning of the list of blocks at this binding level,
601 rather than the end. This hack is no longer used. */
607 /* Any uses of undefined labels, and any defined labels, now operate
608 under constraints of next binding contour. */
613 /* Get the decls in the order they were written.
614 Usually current_binding_level->names is in reverse order.
615 But parameter decls were previously put in forward order. */
619 {
622 }
624 /* If there were any declarations or structure tags in that level,
625 or if this level is a function body,
626 create a BLOCK to record them for the life of this function. */
628 /* Avoid function body block if possible. */
634 {
637 }
639 /* In each subblock, record that this is its superior. */
644 /* We still support the old for-scope rules, whereby the variables
645 in a init statement were in scope after the for-statement ended.
646 We only use the new rules if flag_new_for_scope is nonzero. */
647 leaving_for_scope
650 /* Before we remove the declarations first check for unused variables. */
655 {
656 /* There are cases where D itself is a TREE_LIST. See in
657 push_local_binding where the list of decls returned by
658 getdecls is built. */
665 /* For structured bindings, consider only real variables, not
666 subobjects. */
674 {
676 {
679 OPT_Wunused_variable,
681 else
684 }
686 // For -Wunused-but-set-variable leave references alone.
689 {
694 else
696 OPT_Wunused_but_set_variable,
699 }
700 }
701 }
703 /* Remove declarations for all the DECLs in this level. */
705 {
710 /* It's hard to make this ARM compatibility hack play nicely with
711 lambdas, and it really isn't necessary in C++11 mode. */
714 {
723 /* We have something like:
725 int i;
726 for (int i; ;);
728 and we are leaving the `for' scope. There's no reason to
729 keep the binding of the inner `i' in this case. */
730 ;
733 /* Here, we have something like:
735 typedef int I;
737 void f () {
738 for (int I; ;);
739 }
741 We must pop the for-scope binding so we know what's a
742 type and what isn't. */
743 ;
744 else
745 {
746 /* Mark this VAR_DECL as dead so that we can tell we left it
747 there only for backward compatibility. */
750 /* Keep track of what should have happened when we
751 popped the binding. */
753 {
756 }
758 /* Add it to the list of dead variables in the next
759 outermost binding to that we can remove these when we
760 leave that binding. */
763 link);
765 /* Although we don't pop the cxx_binding, we do clear
766 its SCOPE since the scope is going away now. */
770 /* Don't remove the binding. */
772 }
773 }
774 /* Remove the binding. */
777 else
779 }
781 /* Remove declarations for any `for' variables from inner scopes
782 that we kept around. */
787 /* Restore the IDENTIFIER_TYPE_VALUEs. */
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. */
1093 }
1095 {
1109 else
1110 // We don't need to check equivalently_constrained for variable and
1111 // function templates because we check it on the results.
1113 }
1114 else
1115 {
1116 /* Need to check scope for variable declaration (VAR_DECL).
1117 For typedef (TYPE_DECL), scope is ignored. */
1120 /* [dcl.link]
1121 Two declarations for an object with C language linkage
1122 with the same name (ignoring the namespace that qualify
1123 it) that appear in different namespace scopes refer to
1124 the same object. */
1134 else
1137 COMPARE_REDECLARATION);
1138 }
1140 // Normal functions can be constrained, as can variable partial
1141 // specializations.
1146 }
1148 /* NEWDECL and OLDDECL have identical signatures. If they are
1149 different versions adjust them and return true. */
1151 bool
1153 {
1160 {
1165 }
1168 {
1173 }
1175 /* Only record if at least one was not already versions. */
1180 }
1182 /* If NEWDECL is `static' and an `extern' was seen previously,
1183 warn about it. OLDDECL is the previous declaration.
1185 Note that this does not apply to the C++ case of declaring
1186 a variable `extern const' and then later `const'.
1188 Don't complain about built-in functions, since they are beyond
1189 the user's control. */
1191 void
1193 {
1200 /* Don't get confused by static member functions; that's a different
1201 use of `static'. */
1206 /* If the old declaration was `static', or the new one isn't, then
1207 everything is OK. */
1211 /* It's OK to declare a builtin function as `static'. */
1220 }
1222 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1223 function templates. If their exception specifications do not
1224 match, issue a diagnostic. */
1226 static void
1228 tree old_decl)
1229 {
1233 /* Two default specs are equivalent, don't force evaluation. */
1243 /* [except.spec]
1245 If any declaration of a function has an exception-specification,
1246 all declarations, including the definition and an explicit
1247 specialization, of that function shall have an
1248 exception-specification with the same set of type-ids. */
1251 {
1259 /* We used to silently permit mismatched eh specs with
1260 -fno-exceptions, so make them a pedwarn now. */
1262 else
1267 }
1268 }
1270 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1271 Otherwise issue diagnostics. */
1273 static bool
1275 {
1285 {
1287 {
1288 /* Hide a built-in declaration. */
1292 }
1293 /* 7.1.5 [dcl.constexpr]
1294 Note: An explicit specialization can differ from the template
1295 declaration with respect to the constexpr specifier. */
1301 "redeclaration %qD differs in %<constexpr%> "
1306 }
1308 }
1310 // If OLDDECL and NEWDECL are concept declarations with the same type
1311 // (i.e., and template parameters), but different requirements,
1312 // emit diagnostics and return true. Otherwise, return false.
1315 {
1327 {
1332 {
1335 }
1336 }
1338 }
1340 /* DECL is a redeclaration of a function or function template. If
1341 it does have default arguments issue a diagnostic. Note: this
1342 function is used to enforce the requirements in C++11 8.3.6 about
1343 no default arguments in redeclarations. */
1345 static void
1347 {
1353 {
1355 "redeclaration of %q#D may not have default "
1358 }
1359 }
1361 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1363 DECL_ATTRIBUTES (fn)))
1365 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1366 If the redeclaration is invalid, a diagnostic is issued, and the
1367 error_mark_node is returned. Otherwise, OLDDECL is returned.
1369 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1370 returned.
1372 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1374 tree
1376 {
1380 tree new_template_info;
1387 /* If either the type of the new decl or the type of the old decl is an
1388 error_mark_node, then that implies that we have already issued an
1389 error (earlier) for some bogus type specification, and in that case,
1390 it is rather pointless to harass the user with yet more error message
1391 about the same declaration, so just pretend the types match here. */
1398 {
1409 }
1415 {
1419 else
1422 }
1424 /* Check for redeclaration and other discrepancies. */
1427 {
1430 {
1431 /* Avoid warnings redeclaring built-ins which have not been
1432 explicitly declared. */
1434 {
1438 OPT_Wbuiltin_declaration_mismatch,
1440 newdecl);
1442 }
1444 /* If you declare a built-in or predefined function name as static,
1445 the old definition is overridden, but optionally warn this was a
1446 bad choice of name. */
1448 {
1453 /* Discard the old built-in function. */
1455 }
1456 /* If the built-in is not ansi, then programs can override
1457 it even globally without an error. */
1462 else
1466 }
1468 {
1475 }
1477 {
1478 /* Avoid warnings redeclaring built-ins which have not been
1479 explicitly declared. */
1481 {
1484 /* A new declaration doesn't match a built-in one unless it
1485 is also extern "C". */
1495 {
1498 /* FILE, tm types are not known at the time
1499 we create the builtins. */
1505 {
1512 {
1520 newdecl_is_friend);
1522 }
1524 }
1528 next_arg:;
1529 }
1532 OPT_Wbuiltin_declaration_mismatch,
1533 "declaration of %q#D conflicts with built-in "
1535 }
1540 {
1541 /* A near match; override the builtin. */
1545 OPT_Wbuiltin_declaration_mismatch,
1546 "new declaration %q#D ambiguates built-in "
1548 else
1553 }
1554 else
1555 /* Discard the old built-in function. */
1558 /* Replace the old RTL to avoid problems with inlining. */
1560 }
1561 /* Even if the types match, prefer the new declarations type for
1562 built-ins which have not been explicitly declared, for
1563 exception lists, etc... */
1565 {
1572 }
1574 /* If a function is explicitly declared "throw ()", propagate that to
1575 the corresponding builtin. */
1580 {
1585 }
1587 /* Whether or not the builtin can throw exceptions has no
1588 bearing on this declarator. */
1592 {
1593 /* If a builtin function is redeclared as `static', merge
1594 the declarations, but make the original one static. */
1598 /* Make the old declaration consistent with the new one so
1599 that all remnants of the builtin-ness of this function
1600 will be banished. */
1603 }
1604 }
1606 {
1607 /* C++ Standard, 3.3, clause 4:
1608 "[Note: a namespace name or a class template name must be unique
1609 in its declarative region (7.3.2, clause 14). ]" */
1616 {
1621 {
1622 /* We do nothing special here, because C++ does such nasty
1623 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1624 get shadowed, and know that if we need to find a TYPE_DECL
1625 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1626 slot of the identifier. */
1628 }
1635 }
1644 }
1646 {
1648 /* These are certainly not duplicate declarations; they're
1649 from different scopes. */
1653 {
1654 /* The name of a class template may not be declared to refer to
1655 any other template, class, function, object, namespace, value,
1656 or type in the same scope. */
1659 {
1664 }
1671 /* Template functions can be disambiguated by
1672 return type. */
1675 // Template functions can also be disambiguated by
1676 // constraints.
1678 {
1682 }
1686 }
1688 {
1690 {
1692 newdecl);
1696 }
1697 /* For function versions, params and types match, but they
1698 are not ambiguous. */
1701 // The functions have the same parameter types.
1704 // And the same constraints.
1706 {
1711 }
1712 else
1714 }
1715 else
1716 {
1721 }
1722 }
1732 /* It's OK to have a template specialization and a non-template
1733 with the same type, or to have specializations of two
1734 different templates with the same type. Note that if one is a
1735 specialization, and the other is an instantiation of the same
1736 template, that we do not exit at this point. That situation
1737 can occur if we instantiate a template class, and then
1738 specialize one of its methods. This situation is valid, but
1739 the declarations must be merged in the usual way. */
1746 /* One of the declarations is a template instantiation, and the
1747 other is not a template at all. That's OK. */
1750 {
1751 /* In [namespace.alias] we have:
1753 In a declarative region, a namespace-alias-definition can be
1754 used to redefine a namespace-alias declared in that declarative
1755 region to refer only to the namespace to which it already
1756 refers.
1758 Therefore, if we encounter a second alias directive for the same
1759 alias, we can just ignore the second directive. */
1765 /* Leave it to update_binding to merge or report error. */
1767 }
1768 else
1769 {
1772 {
1780 }
1785 {
1786 /* Prototype decl follows defn w/o prototype. */
1791 }
1794 {
1795 /* [dcl.link]
1796 If two declarations of the same function or object
1797 specify different linkage-specifications ..., the program
1798 is ill-formed.... Except for functions with C++ linkage,
1799 a function declaration without a linkage specification
1800 shall not precede the first linkage specification for
1801 that function. A function can be declared without a
1802 linkage specification after an explicit linkage
1803 specification has been seen; the linkage explicitly
1804 specified in the earlier declaration is not affected by
1805 such a function declaration.
1807 DR 563 raises the question why the restrictions on
1808 functions should not also apply to objects. Older
1809 versions of G++ silently ignore the linkage-specification
1810 for this example:
1812 namespace N {
1813 extern int i;
1814 extern "C" int i;
1815 }
1817 which is clearly wrong. Therefore, we now treat objects
1818 like functions. */
1820 {
1821 /* There is no explicit linkage-specification, so we use
1822 the linkage from the previous declaration. */
1825 }
1826 else
1827 {
1833 }
1834 }
1837 ;
1839 {
1840 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1843 as FUNCTION_DECLs. */
1845 /* C++11 8.3.6/6.
1846 Default arguments for a member function of a class
1847 template shall be specified on the initial declaration
1848 of the member function within the class template. */
1851 else
1852 {
1860 {
1863 {
1865 "default argument given for parameter "
1869 olddecl);
1870 }
1871 else
1872 {
1877 olddecl);
1878 }
1879 }
1880 }
1881 }
1882 }
1884 /* Do not merge an implicit typedef with an explicit one. In:
1886 class A;
1887 ...
1888 typedef class A A __attribute__ ((foo));
1890 the attribute should apply only to the typedef. */
1896 /* If new decl is `static' and an `extern' was seen previously,
1897 warn about it. */
1903 /* We have committed to returning 1 at this point. */
1905 {
1906 /* Now that functions must hold information normally held
1907 by field decls, there is extra work to do so that
1908 declaration information does not get destroyed during
1909 definition. */
1927 /* Optionally warn about more than one declaration for the same
1928 name, but don't warn about a function declaration followed by a
1929 definition. */
1932 /* Don't warn about extern decl followed by definition. */
1934 /* Don't warn about friends, let add_friend take care of it. */
1936 /* Don't warn about declaration followed by specialization. */
1939 {
1941 OPT_Wredundant_decls,
1943 newdecl))
1946 }
1950 {
1952 {
1956 }
1958 }
1959 }
1961 /* Deal with C++: must preserve virtual function table size. */
1963 {
1973 }
1975 /* Copy all the DECL_... slots specified in the new decl
1976 except for any that we copy here from the old type. */
1981 {
1987 {
1990 }
1991 }
1994 {
1995 tree old_result;
1996 tree new_result;
2008 {
2009 /* Per C++11 8.3.6/4, default arguments cannot be added in later
2010 declarations of a function template. */
2019 {
2022 else
2034 }
2035 else
2036 {
2042 }
2043 }
2045 /* If the new declaration is a definition, update the file and
2046 line information on the declaration, and also make
2047 the old declaration the same definition. */
2049 {
2055 {
2056 tree parm;
2062 }
2063 }
2066 }
2069 {
2073 /* Automatically handles default parameters. */
2075 tree newtype;
2077 /* For typedefs use the old type, as the new type's DECL_NAME points
2078 at newdecl, which will be ggc_freed. */
2080 {
2081 /* But NEWTYPE might have an attribute, honor that. */
2086 {
2090 }
2092 /* And remove the new type from the variants list. */
2094 {
2099 {
2102 }
2103 }
2104 }
2105 else
2106 /* Merge the data types specified in the two decls. */
2110 {
2112 /* For already initialized vars, TREE_READONLY could have been
2113 cleared in cp_finish_decl, because the var needs runtime
2114 initialization or destruction. Make sure not to set
2115 TREE_READONLY on it again. */
2129 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2132 {
2133 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2136 }
2137 }
2139 /* An explicit specialization of a function template or of a member
2140 function of a class template can be declared transaction_safe
2141 independently of whether the corresponding template entity is declared
2142 transaction_safe. */
2155 /* Lay the type out, unless already done. */
2169 /* Merge the type qualifiers. */
2177 /* Merge deprecatedness. */
2181 /* Preserve function specific target and optimization options */
2183 {
2193 }
2195 /* Merge the initialization information. */
2198 {
2202 {
2205 }
2206 }
2209 {
2221 /* Keep the old RTL. */
2223 }
2226 {
2227 /* Keep the old RTL. We cannot keep the old RTL if the old
2228 declaration was for an incomplete object and the new
2229 declaration is not since many attributes of the RTL will
2230 change. */
2232 }
2233 }
2234 /* If cannot merge, then use the new type and qualifiers,
2235 and don't preserve the old rtl. */
2236 else
2237 {
2238 /* Clean out any memory we had of the old declaration. */
2248 }
2250 /* Merge the storage class information. */
2263 {
2272 {
2279 }
2282 {
2286 }
2291 /* If the OLDDECL is an instantiation and/or specialization,
2292 then the NEWDECL must be too. But, it may not yet be marked
2293 as such if the caller has created NEWDECL, but has not yet
2294 figured out that it is a redeclaration. */
2298 /* Don't really know how much of the language-specific
2299 values we should copy from old to new. */
2306 {
2310 {
2314 /* Remember the presence of explicit specialization args. */
2317 }
2319 }
2320 /* Only functions have these fields. */
2322 {
2327 /* DECL_THUNKS is only valid for virtual functions,
2328 otherwise it is a DECL_FRIEND_CONTEXT. */
2331 }
2332 /* Only variables have this field. */
2336 }
2339 {
2340 tree parm;
2342 /* Merge parameter attributes. */
2351 }
2355 {
2356 /* If newdecl is not a specialization, then it is not a
2357 template-related function at all. And that means that we
2358 should have exited above, returning 0. */
2362 /* From [temp.expl.spec]:
2364 If a template, a member template or the member of a class
2365 template is explicitly specialized then that
2366 specialization shall be declared before the first use of
2367 that specialization that would cause an implicit
2368 instantiation to take place, in every translation unit in
2369 which such a use occurs. */
2371 olddecl);
2377 /* Don't propagate visibility from the template to the
2378 specialization here. We'll do that in determine_visibility if
2379 appropriate. */
2382 /* [temp.expl.spec/14] We don't inline explicit specialization
2383 just because the primary template says so. */
2385 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2386 the always_inline attribute. */
2389 {
2392 else
2396 }
2397 }
2399 {
2400 /* Never inline re-defined extern inline functions.
2401 FIXME: this could be better handled by keeping both
2402 function as separate declarations. */
2404 }
2405 else
2406 {
2408 {
2412 }
2414 ;
2428 }
2430 /* Preserve abstractness on cloned [cd]tors. */
2433 /* Update newdecl's parms to point at olddecl. */
2439 {
2443 }
2445 {
2446 /* These need to be copied so that the names are available.
2447 Note that if the types do match, we'll preserve inline
2448 info and other bits, but if not, we won't. */
2451 }
2452 /* If redeclaring a builtin function, it stays built in
2453 if newdecl is a gnu_inline definition, or if newdecl is just
2454 a declaration. */
2457 {
2460 /* If we're keeping the built-in definition, keep the rtl,
2461 regardless of declaration matches. */
2464 {
2467 {
2468 /* If a compatible prototype of these builtin functions
2469 is seen, assume the runtime implements it with the
2470 expected semantics. */
2479 }
2480 }
2483 }
2485 /* If defining a function declared with other language
2486 linkage, use the previously declared language linkage. */
2489 {
2491 /* Don't clear out the arguments if we're just redeclaring a
2492 function. */
2495 }
2496 }
2500 /* Now preserve various other info from the definition. */
2506 /* Warn about conflicting visibility specifications. */
2510 {
2512 "%qD: visibility attribute ignored because it "
2516 }
2517 /* Choose the declaration which specified visibility. */
2519 {
2522 }
2523 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2524 so keep this behavior. */
2526 {
2529 }
2530 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2532 {
2535 }
2544 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2545 with that from NEWDECL below. */
2547 {
2551 }
2553 /* Merge the USED information. */
2559 {
2564 }
2570 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2571 to olddecl and deleted. */
2574 {
2575 /* Set the flag for newdecl so that it gets copied to olddecl. */
2577 /* newdecl will be purged after copying to olddecl and is no longer
2578 a version. */
2580 }
2583 {
2597 /* Preserve symtab node mapping. */
2601 /* If newdecl is a template instantiation, it is possible that
2602 the following sequence of events has occurred:
2604 o A friend function was declared in a class template. The
2605 class template was instantiated.
2607 o The instantiation of the friend declaration was
2608 recorded on the instantiation list, and is newdecl.
2610 o Later, however, instantiate_class_template called pushdecl
2611 on the newdecl to perform name injection. But, pushdecl in
2612 turn called duplicate_decls when it discovered that another
2613 declaration of a global function with the same name already
2614 existed.
2616 o Here, in duplicate_decls, we decided to clobber newdecl.
2618 If we're going to do that, we'd better make sure that
2619 olddecl, and not newdecl, is on the list of
2620 instantiations so that if we try to do the instantiation
2621 again we won't get the clobbered declaration. */
2623 new_template_info,
2624 olddecl);
2625 }
2626 else
2627 {
2634 {
2642 {
2655 }
2663 }
2664 }
2667 {
2671 {
2672 /* Merge the section attribute.
2673 We want to issue an error if the sections conflict but that must be
2674 done later in decl_attributes since we are called before attributes
2675 are assigned. */
2680 {
2684 else
2688 }
2689 }
2693 {
2697 }
2698 }
2704 {
2707 }
2709 /* NEWDECL contains the merged attribute lists.
2710 Update OLDDECL to be the same. */
2713 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2714 so that encode_section_info has a chance to look at the new decl
2715 flags and attributes. */
2722 /* The NEWDECL will no longer be needed. Because every out-of-class
2723 declaration of a member results in a call to duplicate_decls,
2724 freeing these nodes represents in a significant savings.
2726 Before releasing the node, be sore to remove function from symbol
2727 table that might have been inserted there to record comdat group.
2728 Be sure to however do not free DECL_STRUCT_FUNCTION because this
2729 structure is shared in between newdecl and oldecl. */
2733 {
2737 }
2739 /* Remove the associated constraints for newdecl, if any, before
2740 reclaiming memory. */
2747 }
2748 \f
2749 /* Return zero if the declaration NEWDECL is valid
2750 when the declaration OLDDECL (assumed to be for the same name)
2751 has already been seen.
2752 Otherwise return an error message format string with a %s
2753 where the identifier should go. */
2757 {
2759 {
2760 /* Because C++ can put things into name space for free,
2761 constructs like "typedef struct foo { ... } foo"
2762 would look like an erroneous redeclaration. */
2765 else
2767 }
2769 {
2770 /* If this is a pure function, its olddecl will actually be
2771 the original initialization to `0' (which we force to call
2772 abort()). Don't complain about redefinition in this case. */
2777 /* If both functions come from different namespaces, this is not
2778 a redeclaration - this is a conflict with a used function. */
2784 /* We'll complain about linkage mismatches in
2785 warn_extern_redeclared_static. */
2787 /* Defining the same name twice is no good. */
2790 {
2796 }
2799 {
2804 {
2808 else
2811 }
2812 }
2814 check_abi_tag_redeclaration
2819 }
2821 {
2825 {
2830 }
2848 {
2853 {
2857 else
2860 }
2861 }
2863 /* Core issue #226 (C++0x):
2865 If a friend function template declaration specifies a
2866 default template-argument, that declaration shall be a
2867 definition and shall be the only declaration of the
2868 function template in the translation unit. */
2879 }
2885 {
2886 /* Only variables can be thread-local, and all declarations must
2887 agree on this property. */
2891 else
2894 }
2896 {
2897 /* The objects have been declared at namespace scope. If either
2898 is a member of an anonymous union, then this is an invalid
2899 redeclaration. For example:
2901 int i;
2902 union { int i; };
2904 is invalid. */
2908 /* If at least one declaration is a reference, there is no
2909 conflict. For example:
2911 int i = 3;
2912 extern int i;
2914 is valid. */
2918 /* Static data member declared outside a class definition
2919 if the variable is defined within the class with constexpr
2920 specifier is declaration rather than definition (and
2921 deprecated). */
2926 {
2928 /* For now, only warn with explicit -Wdeprecated. */
2931 "redundant redeclaration of %<constexpr%> static "
2936 }
2938 /* Reject two definitions. */
2940 }
2941 else
2942 {
2943 /* Objects declared with block scope: */
2944 /* Reject two definitions, and reject a definition
2945 together with an external reference. */
2949 }
2950 }
2951 \f
2953 /* Hash and equality functions for the named_label table. */
2955 hashval_t
2957 {
2959 }
2961 bool
2963 {
2965 }
2967 /* Look for a label named ID in the current function. If one cannot
2968 be found, create one. Return the named_label_entry, or NULL on
2969 failure. */
2973 {
2974 /* You can't use labels at global scope. */
2976 {
2979 }
2985 named_label_entry **slot
2990 {
2995 {
2999 }
3000 }
3002 /* We are making a new decl, create or reuse the named_label_entry */
3006 else
3007 {
3012 }
3014 /* Now create the LABEL_DECL. */
3020 {
3024 }
3029 }
3031 /* Wrapper for lookup_label_1. */
3033 tree
3035 {
3040 }
3042 tree
3044 {
3049 }
3051 /* Returns nonzero if it is ill-formed to jump past the declaration of
3052 DECL. Returns 2 if it's also a real problem. */
3054 static int
3056 {
3057 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
3058 with automatic storage duration is not in scope to a point where it is
3059 in scope is ill-formed unless the variable has scalar type, class type
3060 with a trivial default constructor and a trivial destructor, a
3061 cv-qualified version of one of these types, or an array of one of the
3062 preceding types and is declared without an initializer (8.5). */
3077 }
3079 /* A subroutine of check_previous_goto_1 and check_goto to identify a branch
3080 to the user. */
3082 static bool
3084 diagnostic_t diag_kind)
3085 {
3086 bool complained
3093 }
3095 /* Check that a single previously seen jump to a newly defined label
3096 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
3097 the jump context; NAMES are the names in scope in LEVEL at the jump
3098 context; LOCUS is the source position of the jump or 0. Returns
3099 true if all is well. */
3101 static bool
3104 {
3111 {
3117 }
3120 {
3126 {
3132 {
3134 DK_PERMERROR);
3136 }
3138 {
3142 else
3144 " enters scope of %q#D, which has "
3146 }
3147 }
3155 {
3182 {
3186 }
3191 }
3194 {
3200 }
3201 }
3204 }
3206 static void
3208 {
3212 }
3214 static bool
3216 {
3218 }
3220 /* Check that a new jump to a label DECL is OK. Called by
3221 finish_goto_stmt. */
3223 void
3225 {
3226 /* We can't know where a computed goto is jumping.
3227 So we assume that it's OK. */
3231 /* We didn't record any information about this label when we created it,
3232 and there's not much point since it's trivial to analyze as a return. */
3237 named_label_entry **slot
3241 /* If the label hasn't been defined yet, defer checking. */
3243 {
3244 /* Don't bother creating another use if the last goto had the
3245 same data, and will therefore create the same set of errors. */
3250 named_label_use_entry *new_use
3260 }
3264 tree bad;
3270 {
3278 }
3281 {
3285 {
3286 /* Can't skip init of __exception_info. */
3288 {
3292 }
3296 }
3298 {
3302 else
3304 " enters scope of %q#D which has "
3306 }
3307 }
3310 {
3319 }
3322 {
3325 }
3328 {
3332 {
3334 {
3339 }
3343 }
3344 }
3345 }
3347 /* Check that a return is ok wrt OpenMP structured blocks.
3348 Called by finish_return_stmt. Returns true if all is well. */
3350 bool
3352 {
3355 {
3358 }
3362 }
3364 /* Define a label, specifying the location in the source file.
3365 Return the LABEL_DECL node for the label. */
3367 static tree
3369 {
3370 /* After labels, make any new cleanups in the function go into their
3371 own new (temporary) binding contour. */
3381 {
3384 }
3385 else
3386 {
3387 /* Mark label as having been defined. */
3389 /* Say where in the source. */
3398 }
3401 }
3403 /* Wrapper for define_label_1. */
3405 tree
3407 {
3412 }
3415 struct cp_switch
3416 {
3419 /* The SWITCH_STMT being built. */
3420 tree switch_stmt;
3421 /* A splay-tree mapping the low element of a case range to the high
3422 element, or NULL_TREE if there is no high element. Used to
3423 determine whether or not a new case label duplicates an old case
3424 label. We need a tree, rather than simply a hash table, because
3425 of the GNU case range extension. */
3426 splay_tree cases;
3427 /* Remember whether there was a case value that is outside the
3428 range of the original type of the controlling expression. */
3430 };
3432 /* A stack of the currently active switch statements. The innermost
3433 switch statement is on the top of the stack. There is no need to
3434 mark the stack for garbage collection because it is only active
3435 during the processing of the body of a function, and we never
3436 collect at that point. */
3440 /* Called right after a switch-statement condition is parsed.
3441 SWITCH_STMT is the switch statement being parsed. */
3443 void
3445 {
3453 }
3455 void
3457 {
3459 location_t switch_location;
3461 /* Emit warnings as needed. */
3463 const bool bool_cond_p
3475 }
3477 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3478 condition. Note that if TYPE and VALUE are already integral we don't
3479 really do the conversion because the language-independent
3480 warning/optimization code will work better that way. */
3482 static tree
3484 {
3491 {
3494 value = (perform_implicit_conversion_flags
3497 }
3499 }
3501 /* Note that we've seen a definition of a case label, and complain if this
3502 is a bad place for one. */
3504 tree
3506 {
3509 tree type;
3512 {
3513 tree label;
3515 /* For templates, just add the case label; we'll do semantic
3516 analysis at instantiation-time. */
3519 }
3521 /* Find the condition on which this switch statement depends. */
3538 /* After labels, make any new cleanups in the function go into their
3539 own new (temporary) binding contour. */
3546 }
3547 \f
3549 tree scope;
3550 tree name;
3551 tree template_id;
3554 };
3557 {
3560 /* Hash a TYPENAME_TYPE. */
3562 static hashval_t
3564 {
3565 hashval_t hash;
3571 }
3573 /* Compare two TYPENAME_TYPEs. */
3575 static bool
3577 {
3583 }
3584 };
3586 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3587 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3589 Returns the new TYPENAME_TYPE. */
3593 tree
3596 {
3597 tree t;
3598 tree d;
3599 typename_info ti;
3601 hashval_t hash;
3616 /* See if we already have this type. */
3620 else
3621 {
3622 /* Build the TYPENAME_TYPE. */
3629 /* Build the corresponding TYPE_DECL. */
3636 /* Store it in the hash table. */
3639 /* TYPENAME_TYPEs must always be compared structurally, because
3640 they may or may not resolve down to another type depending on
3641 the currently open classes. */
3643 }
3646 }
3648 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3649 provided to name the type. Returns an appropriate type, unless an
3650 error occurs, in which case error_mark_node is returned. If we
3651 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3652 return that, rather than the _TYPE it corresponds to, in other
3653 cases we look through the type decl. If TF_ERROR is set, complain
3654 about errors, otherwise be quiet. */
3656 tree
3658 tsubst_flags_t complain)
3659 {
3660 tree fullname;
3661 tree t;
3670 {
3675 else
3676 /* Create a TEMPLATE_ID_EXPR for the type. */
3680 }
3687 {
3692 {
3696 }
3697 }
3699 {
3703 }
3708 {
3712 }
3714 /* When the CONTEXT is a dependent type, NAME could refer to a
3715 dependent base class of CONTEXT. But look inside it anyway
3716 if CONTEXT is a currently open scope, in case it refers to a
3717 member of the current instantiation or a non-dependent base;
3718 lookup will stop when we hit a dependent base. */
3720 /* We should only set WANT_TYPE when we're a nested typename type.
3721 Then we can give better diagnostics if we find a non-type. */
3723 else
3732 {
3734 {
3737 else
3740 }
3742 }
3744 /* Pull out the template from an injected-class-name (or multiple). */
3749 {
3751 {
3754 }
3756 }
3759 {
3764 }
3766 {
3771 }
3776 /* If we are currently parsing a template and if T is a typedef accessed
3777 through CONTEXT then we need to remember and check access of T at
3778 template instantiation time. */
3793 }
3795 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3796 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3797 in which case error_mark_node is returned.
3799 If PARM_LIST is non-NULL, also make sure that the template parameter
3800 list of TEMPLATE_DECL matches.
3802 If COMPLAIN zero, don't complain about any errors that occur. */
3804 tree
3806 tsubst_flags_t complain)
3807 {
3808 tree t;
3809 tree d;
3819 {
3829 {
3833 }
3837 {
3839 {
3843 }
3845 }
3848 complain))
3852 }
3854 /* Build the UNBOUND_CLASS_TEMPLATE. */
3860 /* Build the corresponding TEMPLATE_DECL. */
3869 }
3871 \f
3873 /* Push the declarations of builtin types into the global namespace.
3874 RID_INDEX is the index of the builtin type in the array
3875 RID_POINTERS. NAME is the name used when looking up the builtin
3876 type. TYPE is the _TYPE node for the builtin type.
3878 The calls to set_global_binding below should be
3879 eliminated. Built-in types should not be looked up name; their
3880 names are keywords that the parser can recognize. However, there
3881 is code in c-common.c that uses identifier_global_value to look up
3882 built-in types by name. */
3884 void
3887 tree type)
3888 {
3892 {
3898 }
3903 {
3909 }
3912 {
3916 }
3917 }
3919 /* Push a type into the namespace so that the back ends ignore it. */
3921 static void
3923 {
3926 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3933 }
3935 /* Create all the predefined identifiers. */
3937 static void
3939 {
3940 struct predefined_identifier
3941 {
3945 };
3947 /* A table of identifiers to create at startup. */
3951 /* Some of these names have a trailing space so that it is
3952 impossible for them to conflict with names written by users. */
3969 /* The demangler expects anonymous namespaces to be called
3970 something starting with '_GLOBAL__N_'. It no longer needs
3971 to be unique to the TU. */
3977 };
3981 {
3983 /* Some of these identifiers already have a special kind. */
3986 }
3987 }
3989 /* Create the predefined scalar types of C,
3990 and some nodes representing standard constants (0, 1, (void *)0).
3991 Initialize the global binding level.
3992 Make definitions for built-in primitive functions. */
3994 void
3996 {
3997 tree void_ftype;
3998 tree void_ftype_ptr;
4000 /* Create all the identifiers we need. */
4003 /* Create the global variables. */
4008 /* Enter the global namespace. */
4011 void_type_node);
4015 /* Remember whether we want the empty class passing ABI change warning
4016 in this TU. */
4019 debug_hooks->register_main_translation_unit
4027 /* Initially, C. */
4030 /* Create the `std' namespace. */
4041 /* Guess at the initial static decls size. */
4044 /* ... and keyed classes. */
4056 NULL_TREE);
4058 #if 0
4060 #endif
4069 void_ftype_ptr
4072 /* Create the conversion operator marker. This operator's DECL_NAME
4073 is in the identifier table, so we can use identifier equality to
4074 find it. */
4076 void_ftype);
4078 /* C++ extensions */
4083 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
4086 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
4087 result. */
4094 {
4095 /* Make sure we get a unique function type, so we can give
4096 its pointer type a name. (This wins for gdb.) */
4103 }
4106 vtbl_type_node
4125 /* Now, C++. */
4130 {
4133 }
4139 {
4142 tree ptr_ftype_sizetype;
4143 tree new_eh_spec;
4145 ptr_ftype_sizetype
4148 {
4149 tree bad_alloc_id;
4150 tree bad_alloc_type_node;
4151 tree bad_alloc_decl;
4157 bad_alloc_decl
4162 new_eh_spec
4164 }
4165 else
4168 /* Ensure attribs.c is initialized. */
4171 /* Ensure constraint.cc is initialized. */
4175 NULL_TREE);
4178 extvisattr);
4192 {
4193 /* Also push the sized deallocation variants:
4194 void operator delete(void*, std::size_t) throw();
4195 void operator delete[](void*, std::size_t) throw(); */
4196 tree void_ftype_ptr_size
4200 extvisattr);
4204 }
4207 {
4214 /* operator new (size_t, align_val_t); */
4226 /* operator delete (void *, align_val_t); */
4235 {
4236 /* operator delete (void *, size_t, align_val_t); */
4239 NULL_TREE);
4244 }
4245 }
4257 }
4259 abort_fndecl
4263 /* Perform other language dependent initializations. */
4277 /* Show we use EH for cleanups. */
4280 }
4282 /* Generate an initializer for a function naming variable from
4283 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4284 filled in with the type of the init. */
4286 tree
4288 {
4290 tree type;
4295 {
4299 }
4308 else
4312 }
4314 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4315 the decl, LOC is the location to give the decl, NAME is the
4316 initialization string and TYPE_DEP indicates whether NAME depended
4317 on the type of the function. We make use of that to detect
4318 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4319 at the point of first use, so we mustn't push the decl now. */
4321 static tree
4323 {
4326 tree type;
4340 {
4344 LOOKUP_ONLYCONVERTING);
4345 }
4346 else
4347 {
4350 }
4353 }
4355 static tree
4357 {
4365 /* Runtime library routines are, by definition, available in an
4366 external shared object. */
4372 /* A function in the user's namespace should have an explicit
4373 declaration before it is used. Mark the built-in function as
4374 anticipated but not actually declared. */
4378 {
4381 /* Treat __*_chk fortification functions as anticipated as well,
4382 unless they are __builtin_*. */
4387 }
4391 else
4395 }
4397 tree
4399 {
4402 /* All builtins that don't begin with an '_' should additionally
4403 go in the 'std' namespace. */
4405 {
4410 }
4413 }
4415 /* Like cxx_builtin_function, but guarantee the function is added to the global
4416 scope. This is to allow function specific options to add new machine
4417 dependent builtins when the target ISA changes via attribute((target(...)))
4418 which saves space on program startup if the program does not use non-generic
4419 ISAs. */
4421 tree
4423 {
4427 /* All builtins that don't begin with an '_' should additionally
4428 go in the 'std' namespace. */
4430 {
4435 }
4438 }
4440 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4441 function. Not called directly. */
4443 static tree
4446 {
4454 /* Runtime library routines are, by definition, available in an
4455 external shared object. */
4460 }
4462 /* Returns the _DECL for a library function with C++ linkage. */
4464 static tree
4467 {
4472 }
4474 /* Like build_library_fn, but takes a C string instead of an
4475 IDENTIFIER_NODE. */
4477 tree
4479 {
4481 }
4483 /* Like build_cp_library_fn, but takes a C string instead of an
4484 IDENTIFIER_NODE. */
4486 tree
4488 {
4490 ecf_flags);
4491 }
4493 /* Like build_library_fn, but also pushes the function so that we will
4494 be able to find it via get_global_binding. Also, the function
4495 may throw exceptions listed in RAISES. */
4497 tree
4499 {
4500 tree fn;
4508 }
4510 /* Like build_cp_library_fn, but also pushes the function so that it
4511 will be found by normal lookup. */
4513 static tree
4516 {
4523 }
4525 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4526 a FUNCTION_TYPE. */
4528 tree
4530 {
4533 }
4535 /* Like push_library_fn, but also note that this function throws
4536 and does not return. Used for __throw_foo and the like. */
4538 tree
4540 {
4543 }
4544 \f
4545 /* When we call finish_struct for an anonymous union, we create
4546 default copy constructors and such. But, an anonymous union
4547 shouldn't have such things; this function undoes the damage to the
4548 anonymous union type T.
4550 (The reason that we create the synthesized methods is that we don't
4551 distinguish `union { int i; }' from `typedef union { int i; } U'.
4552 The first is an anonymous union; the second is just an ordinary
4553 union type.) */
4555 void
4557 {
4558 /* Wipe out memory of synthesized methods. */
4566 /* Splice the implicitly generated functions out of TYPE_FIELDS. */
4570 else
4573 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4574 assignment operators (because they cannot have these methods themselves).
4575 For anonymous unions this is already checked because they are not allowed
4576 in any union, otherwise we have to check it. */
4578 {
4583 {
4586 {
4596 }
4597 }
4598 }
4599 }
4601 /* Warn for an attribute located at LOCATION that appertains to the
4602 class type CLASS_TYPE that has not been properly placed after its
4603 class-key, in it class-specifier. */
4605 void
4607 tree class_type)
4608 {
4612 "attribute ignored in declaration "
4617 }
4619 /* Make sure that a declaration with no declarator is well-formed, i.e.
4620 just declares a tagged type or anonymous union.
4622 Returns the type declared; or NULL_TREE if none. */
4624 tree
4627 {
4630 /* If a class, struct, or enum type is declared by the DECLSPECS
4631 (i.e, if a class-specifier, enum-specifier, or non-typename
4632 elaborated-type-specifier appears in the DECLSPECS),
4633 DECLARED_TYPE is set to the corresponding type. */
4640 {
4646 }
4659 {
4661 "%<auto%> can only be specified for variables "
4664 }
4665 /* Check for an anonymous union. */
4668 {
4669 /* 7/3 In a simple-declaration, the optional init-declarator-list
4670 can be omitted only when declaring a class (clause 9) or
4671 enumeration (7.2), that is, when the decl-specifier-seq contains
4672 either a class-specifier, an elaborated-type-specifier with
4673 a class-key (9.1), or an enum-specifier. In these cases and
4674 whenever a class-specifier or enum-specifier is present in the
4675 decl-specifier-seq, the identifiers in these specifiers are among
4676 the names being declared by the declaration (as class-name,
4677 enum-names, or enumerators, depending on the syntax). In such
4678 cases, and except for the declaration of an unnamed bit-field (9.6),
4679 the decl-specifier-seq shall introduce one or more names into the
4680 program, or shall redeclare a name introduced by a previous
4681 declaration. [Example:
4682 enum { }; // ill-formed
4683 typedef class { }; // ill-formed
4684 --end example] */
4686 {
4689 }
4696 }
4698 else
4699 {
4707 && (!current_class_type
4716 "a storage class can only be specified for objects "
4720 "%<const%> can only be specified for objects and "
4724 "%<volatile%> can only be specified for objects and "
4728 "%<__restrict%> can only be specified for objects and "
4732 "%<__thread%> can only be specified for objects "
4740 }
4743 {
4744 location_t loc;
4747 /* For a non-template class, use the name location. */
4749 else
4750 /* For a template class (an explicit instantiation), use the
4751 current location. */
4755 /* [dcl.attr.grammar]/4:
4757 No attribute-specifier-seq shall appertain to an explicit
4758 instantiation. */
4759 {
4762 declared_type))
4764 "no attribute can be applied to "
4766 }
4767 else
4769 }
4772 }
4774 /* Called when a declaration is seen that contains no names to declare.
4775 If its type is a reference to a structure, union or enum inherited
4776 from a containing scope, shadow that tag name for the current scope
4777 with a forward reference.
4778 If its type defines a new named structure or union
4779 or defines an enum, it is valid but we need not do anything here.
4780 Otherwise, it is an error.
4782 C++: may have to grok the declspecs to learn about static,
4783 complain for anonymous unions.
4785 Returns the TYPE declared -- or NULL_TREE if none. */
4787 tree
4789 {
4799 /* This is where the variables in an anonymous union are
4800 declared. An anonymous union declaration looks like:
4801 union { ... } ;
4802 because there is no declarator after the union, the parser
4803 sends that declaration here. */
4805 {
4809 {
4813 }
4814 }
4817 }
4818 \f
4819 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4821 tree
4825 {
4826 tree attrs;
4827 tree type;
4828 enum decl_context context
4834 {
4839 /* A template type parameter or other dependent type. */
4842 else
4844 }
4846 }
4848 /* Process a DECLARATOR for a function-scope variable declaration,
4849 namespace-scope variable declaration, or function declaration.
4850 (Function definitions go through start_function; class member
4851 declarations appearing in the body of the class go through
4852 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4853 If an error occurs, the error_mark_node is returned instead.
4855 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4856 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4857 for an explicitly defaulted function, or SD_DELETED for an explicitly
4858 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4859 implicitly initialized via a default constructor. ATTRIBUTES and
4860 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4862 The scope represented by the context of the returned DECL is pushed
4863 (if it is not the global namespace) and is assigned to
4864 *PUSHED_SCOPE_P. The caller is then responsible for calling
4865 pop_scope on *PUSHED_SCOPE_P if it is set. */
4867 tree
4871 tree attributes,
4872 tree prefix_attributes,
4874 {
4875 tree decl;
4876 tree context;
4883 /* An object declared as __attribute__((deprecated)) suppresses
4884 warnings of uses of other deprecated items. */
4903 /* Is it valid for this decl to have an initializer at all?
4904 If not, set INITIALIZED to zero, which will indirectly
4905 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4908 {
4911 }
4914 {
4918 decl);
4922 }
4928 /* If this is a typedef that names the class for linkage purposes
4929 (7.1.3p8), apply any attributes directly to the type. */
4934 else
4937 /* Set attributes here so if duplicate decl, will have proper attributes. */
4940 /* Dllimported symbols cannot be defined. Static data members (which
4941 can be initialized in-class and dllimported) go through grokfield,
4942 not here, so we don't need to exclude those decls when checking for
4943 a definition. */
4945 {
4948 }
4950 /* If #pragma weak was used, mark the decl weak now. */
4962 {
4966 {
4972 {
4976 else
4977 {
4983 }
4984 }
4985 else
4986 {
4991 {
4998 }
4999 /* Static data member are tricky; an in-class initialization
5000 still doesn't provide a definition, so the in-class
5001 declaration will have DECL_EXTERNAL set, but will have an
5002 initialization. Thus, duplicate_decls won't warn
5003 about this situation, and so we check here. */
5012 }
5013 }
5014 else
5015 {
5017 this_tmpl
5018 ? current_template_parms
5024 }
5026 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
5028 /* Do not mark DECL as an explicit specialization if it was not
5029 already marked as an instantiation; a declaration should
5030 never be marked as a specialization unless we know what
5031 template is being specialized. */
5033 {
5038 else
5041 /* [temp.expl.spec] An explicit specialization of a static data
5042 member of a template is a definition if the declaration
5043 includes an initializer; otherwise, it is a declaration.
5045 We check for processing_specialization so this only applies
5046 to the new specialization syntax. */
5049 }
5052 /* Aliases are definitions. */
5055 decl);
5056 }
5060 /* Enter this declaration into the symbol table. Don't push the plain
5061 VAR_DECL for a variable template. */
5074 {
5075 /* This is a const variable with implicit 'static'. Set
5076 DECL_THIS_STATIC so we can tell it from variables that are
5077 !TREE_PUBLIC because of the anonymous namespace. */
5080 }
5084 {
5088 decl);
5091 else
5095 }
5101 }
5103 /* Process the declaration of a variable DECL. INITIALIZED is true
5104 iff DECL is explicitly initialized. (INITIALIZED is false if the
5105 variable is initialized via an implicitly-called constructor.)
5106 This function must be called for ordinary variables (including, for
5107 example, implicit instantiations of templates), but must not be
5108 called for template declarations. */
5110 void
5112 {
5113 tree type;
5128 /* If an explicit initializer is present, or if this is a definition
5129 of an aggregate, then we need a complete type at this point.
5130 (Scalars are always complete types, so there is nothing to
5131 check.) This code just sets COMPLETE_P; errors (if necessary)
5132 are issued below. */
5134 && !complete_p
5136 {
5138 /* We will not yet have set TREE_READONLY on DECL if the type
5139 was "const", but incomplete, before this point. But, now, we
5140 have a complete type, so we can try again. */
5142 }
5145 /* Is it valid for this decl to have an initializer at all? */
5146 {
5147 /* Don't allow initializations for incomplete types except for
5148 arrays which might be completed by the initialization. */
5154 {
5157 }
5159 {
5162 /* else we already gave an error in start_decl. */
5163 }
5164 }
5166 {
5169 else
5170 {
5172 decl);
5173 /* Change the type so that assemble_variable will give
5174 DECL an rtl we can live with: (mem (const_int 0)). */
5176 }
5177 }
5179 /* Create a new scope to hold this declaration if necessary.
5180 Whether or not a new scope is necessary cannot be determined
5181 until after the type has been completed; if the type is a
5182 specialization of a class template it is not until after
5183 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
5184 will be set correctly. */
5186 }
5188 /* Handle initialization of references. DECL, TYPE, and INIT have the
5189 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
5190 but will be set to a new CLEANUP_STMT if a temporary is created
5191 that must be destroyed subsequently.
5193 Returns an initializer expression to use to initialize DECL, or
5194 NULL if the initialization can be performed statically.
5196 Quotes on semantics can be found in ARM 8.4.3. */
5198 static tree
5200 {
5202 {
5208 }
5212 tf_warning_or_error);
5217 /* Note: default conversion is only called in very special cases. */
5220 /* check_initializer handles this for non-reference variables, but for
5221 references we need to do it here or the initializer will get the
5222 incomplete array type and confuse later calls to
5223 cp_complete_array_type. */
5228 {
5232 }
5234 /* Convert INIT to the reference type TYPE. This may involve the
5235 creation of a temporary, whose lifetime must be the same as that
5236 of the reference. If so, a DECL_EXPR for the temporary will be
5237 added just after the DECL_EXPR for DECL. That's why we don't set
5238 DECL_INITIAL for local references (instead assigning to them
5239 explicitly); we need to allow the temporary to be initialized
5240 first. */
5242 tf_warning_or_error);
5243 }
5245 /* Designated initializers in arrays are not supported in GNU C++.
5246 The parser cannot detect this error since it does not know whether
5247 a given brace-enclosed initializer is for a class type or for an
5248 array. This function checks that CE does not use a designated
5249 initializer. If it does, an error is issued. Returns true if CE
5250 is valid, i.e., does not have a designated initializer. */
5252 static bool
5255 {
5256 /* Designated initializers for array elements are not supported. */
5258 {
5259 /* The parser only allows identifiers as designated
5260 initializers. */
5262 {
5266 }
5268 {
5272 }
5280 {
5281 /* A C99 designator is OK if it matches the current index. */
5284 else
5286 }
5287 else
5292 }
5295 }
5297 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5298 array until we finish parsing the initializer. If that's the
5299 situation we're in, update DECL accordingly. */
5301 static void
5303 {
5309 {
5310 /* do_default is really a C-ism to deal with tentative definitions.
5311 But let's leave it here to ease the eventual merge. */
5316 /* Check that there are no designated initializers in INIT, as
5317 those are not supported in GNU C++, and as the middle-end
5318 will crash if presented with a non-numeric designated
5319 initializer. */
5321 {
5324 HOST_WIDE_INT i;
5328 }
5331 {
5333 do_default);
5335 {
5339 }
5341 {
5343 {
5346 }
5347 /* If a `static' var's size isn't known, make it extern as
5348 well as static, so it does not get allocated. If it's not
5349 `static', then don't mark it extern; finish_incomplete_decl
5350 will give it a default size and it will get allocated. */
5353 }
5355 {
5358 }
5359 }
5364 }
5365 }
5367 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5368 any appropriate error messages regarding the layout. */
5370 static void
5372 {
5373 tree type;
5379 /* If we haven't already laid out this declaration, do so now.
5380 Note that we must not call complete type for an external object
5381 because it's type might involve templates that we are not
5382 supposed to instantiate yet. (And it's perfectly valid to say
5383 `extern X x' for some incomplete type `X'.) */
5392 {
5393 /* An automatic variable with an incomplete type: that is an error.
5394 Don't talk about array types here, since we took care of that
5395 message in grokdeclarator. */
5399 }
5400 #if 0
5401 /* Keep this code around in case we later want to control debug info
5402 based on whether a type is "used". (jason 1999-11-11) */
5405 /* Let debugger know it should output info for this type. */
5410 #endif
5415 {
5418 else
5419 {
5423 }
5424 }
5425 }
5427 /* If a local static variable is declared in an inline function, or if
5428 we have a weak definition, we must endeavor to create only one
5429 instance of the variable at link-time. */
5431 void
5433 {
5434 /* Static data in a function with comdat linkage also has comdat
5435 linkage. */
5437 /* Don't mess with __FUNCTION__. */
5442 {
5444 {
5445 /* With weak symbols, we simply make the variable COMDAT;
5446 that will cause copies in multiple translations units to
5447 be merged. */
5449 }
5450 else
5451 {
5454 {
5455 /* Without weak symbols, we can use COMMON to merge
5456 uninitialized variables. */
5459 }
5460 else
5461 {
5462 /* While for initialized variables, we must use internal
5463 linkage -- which means that multiple copies will not
5464 be merged. */
5470 "%q#D are wrong (you%'ll wind up with "
5472 else
5474 "static data %q#D are wrong (you%'ll wind "
5480 }
5481 }
5482 }
5483 }
5485 /* Issue an error message if DECL is an uninitialized const variable. */
5487 static void
5489 {
5492 /* ``Unless explicitly declared extern, a const object does not have
5493 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5494 7.1.6 */
5499 {
5507 else
5508 {
5512 decl);
5514 }
5517 {
5518 tree defaulted_ctor;
5525 "constructor is not user-provided because it is "
5528 "and the implicitly-defined constructor does not "
5530 }
5531 }
5532 }
5533 \f
5534 /* Structure holding the current initializer being processed by reshape_init.
5535 CUR is a pointer to the current element being processed, END is a pointer
5536 after the last element present in the initializer. */
5537 struct reshape_iter
5538 {
5541 };
5545 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5546 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5547 initialized. If there are no more such fields, the return value
5548 will be NULL. */
5550 tree
5552 {
5561 }
5563 /* Return true for [dcl.init.list] direct-list-initialization from
5564 single element of enumeration with a fixed underlying type. */
5566 bool
5568 {
5577 }
5579 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5580 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5581 INTEGER_CST representing the size of the array minus one (the maximum index),
5582 or NULL_TREE if the array was declared without specifying the size. D is
5583 the iterator within the constructor. */
5585 static tree
5587 tsubst_flags_t complain)
5588 {
5589 tree new_init;
5594 /* The initializer for an array is always a CONSTRUCTOR. */
5598 {
5599 /* Minus 1 is used for zero sized arrays. */
5605 /* sizetype is sign extended, not zero extended. */
5606 else
5608 }
5610 /* Loop until there are no more initializers. */
5614 {
5615 tree elt_init;
5620 complain);
5628 /* This can happen with an invalid initializer (c++/54501). */
5631 }
5634 }
5636 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5637 Parameters are the same of reshape_init_r. */
5639 static tree
5641 {
5650 }
5652 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5653 Parameters are the same of reshape_init_r. */
5655 static tree
5657 {
5663 {
5666 {
5671 }
5674 }
5676 /* For a vector, we initialize it as an array of the appropriate size. */
5681 }
5683 /* Subroutine of reshape_init_r, processes the initializers for classes
5684 or union. Parameters are the same of reshape_init_r. */
5686 static tree
5688 tsubst_flags_t complain)
5689 {
5690 tree field;
5691 tree new_init;
5695 /* The initializer for a class is always a CONSTRUCTOR. */
5700 {
5701 /* [dcl.init.aggr]
5703 An initializer for an aggregate member that is an
5704 empty class shall have the form of an empty
5705 initializer-list {}. */
5707 {
5711 }
5713 }
5715 /* Loop through the initializable fields, gathering initializers. */
5717 {
5718 tree field_init;
5721 /* Handle designated initializers, as an extension. */
5723 {
5728 /* We already reshaped this. */
5732 else
5733 {
5738 }
5741 {
5746 }
5747 }
5749 /* If we processed all the member of the class, we are done. */
5759 {
5760 /* This can happen with an invalid initializer for a flexible
5761 array member (c++/54441). */
5765 }
5769 /* [dcl.init.aggr]
5771 When a union is initialized with a brace-enclosed
5772 initializer, the braces shall only contain an
5773 initializer for the first member of the union. */
5778 }
5781 }
5783 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5784 designators are not valid; either complain or return true to indicate
5785 that reshape_init_r should return error_mark_node. */
5787 static bool
5789 {
5791 {
5795 else
5797 }
5799 }
5801 /* Subroutine of reshape_init, which processes a single initializer (part of
5802 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5803 iterator within the CONSTRUCTOR which points to the initializer to process.
5804 FIRST_INITIALIZER_P is true if this is the first initializer of the
5805 outermost CONSTRUCTOR node. */
5807 static tree
5809 tsubst_flags_t complain)
5810 {
5821 {
5822 /* A complex type can be initialized from one or two initializers,
5823 but braces are not elided. */
5826 {
5828 {
5831 else
5833 }
5834 }
5836 {
5844 }
5846 }
5848 /* A non-aggregate type is always initialized with a single
5849 initializer. */
5851 {
5852 /* It is invalid to initialize a non-aggregate type with a
5853 brace-enclosed initializer before C++0x.
5854 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5855 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5856 a CONSTRUCTOR (with a record type). */
5858 /* Don't complain about a capture-init. */
5861 {
5863 {
5865 /* Isn't value-initialization. */
5867 {
5870 type);
5872 }
5873 }
5874 else
5876 }
5880 }
5882 /* "If T is a class type and the initializer list has a single element of
5883 type cv U, where U is T or a class derived from T, the object is
5884 initialized from that element." Even if T is an aggregate. */
5886 && first_initializer_p
5889 {
5892 }
5894 /* [dcl.init.aggr]
5896 All implicit type conversions (clause _conv_) are considered when
5897 initializing the aggregate member with an initializer from an
5898 initializer-list. If the initializer can initialize a member,
5899 the member is initialized. Otherwise, if the member is itself a
5900 non-empty subaggregate, brace elision is assumed and the
5901 initializer is considered for the initialization of the first
5902 member of the subaggregate. */
5904 /* But don't try this for the first initializer, since that would be
5905 looking through the outermost braces; A a2 = { a1 }; is not a
5906 valid aggregate initialization. */
5907 && !first_initializer_p
5910 complain)))
5911 {
5914 }
5916 /* [dcl.init.string]
5918 A char array (whether plain char, signed char, or unsigned char)
5919 can be initialized by a string-literal (optionally enclosed in
5920 braces); a wchar_t array can be initialized by a wide
5921 string-literal (optionally enclosed in braces). */
5924 {
5927 /* Strip one level of braces if and only if they enclose a single
5928 element (as allowed by [dcl.init.string]). */
5932 {
5934 }
5936 /* If it's a string literal, then it's the initializer for the array
5937 as a whole. Otherwise, continue with normal initialization for
5938 array types (one value per array element). */
5940 {
5945 }
5946 }
5948 /* The following cases are about aggregates. If we are not within a full
5949 initializer already, and there is not a CONSTRUCTOR, it means that there
5950 is a missing set of braces (that is, we are processing the case for
5951 which reshape_init exists). */
5953 {
5955 {
5957 /* There is no need to reshape pointer-to-member function
5958 initializers, as they are always constructed correctly
5959 by the front end. */
5960 ;
5962 /* For a nested compound literal, there is no need to reshape since
5963 brace elision is not allowed. Even if we decided to allow it,
5964 we should add a call to reshape_init in finish_compound_literal,
5965 before calling digest_init, so changing this code would still
5966 not be necessary. */
5968 else
5969 {
5973 }
5974 }
5979 type);
5980 }
5982 /* Dispatch to specialized routines. */
5989 else
5991 }
5993 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5994 brace-enclosed aggregate initializer.
5996 INIT is the CONSTRUCTOR containing the list of initializers describing
5997 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5998 It may not presently match the shape of the TYPE; for example:
6000 struct S { int a; int b; };
6001 struct S a[] = { 1, 2, 3, 4 };
6003 Here INIT will hold a vector of four elements, rather than a
6004 vector of two elements, each itself a vector of two elements. This
6005 routine transforms INIT from the former form into the latter. The
6006 revised CONSTRUCTOR node is returned. */
6008 tree
6010 {
6012 reshape_iter d;
6013 tree new_init;
6019 /* An empty constructor does not need reshaping, and it is always a valid
6020 initializer. */
6024 /* Handle [dcl.init.list] direct-list-initialization from
6025 single element of enumeration with a fixed underlying type. */
6027 {
6031 {
6034 }
6035 else
6037 }
6039 /* Recurse on this CONSTRUCTOR. */
6047 /* Make sure all the element of the constructor were used. Otherwise,
6048 issue an error about exceeding initializers. */
6050 {
6054 }
6061 }
6063 /* Verify array initializer. Returns true if errors have been reported. */
6065 bool
6067 {
6070 /* The array type itself need not be complete, because the
6071 initializer may tell us how many elements are in the array.
6072 But, the elements of the array must be complete. */
6074 {
6078 else
6081 }
6082 /* A compound literal can't have variable size. */
6086 {
6089 }
6091 }
6093 /* Subroutine of check_initializer; args are passed down from that function.
6094 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
6096 static tree
6099 {
6102 }
6104 /* Verify INIT (the initializer for DECL), and record the
6105 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
6106 grok_reference_init.
6108 If the return value is non-NULL, it is an expression that must be
6109 evaluated dynamically to initialize DECL. */
6111 static tree
6113 {
6116 tree core_type;
6118 /* Things that are going to be initialized need to have complete
6119 type. */
6123 {
6124 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
6125 it doesn't have storage to be initialized. */
6128 }
6131 /* We will have already complained. */
6135 {
6138 }
6140 {
6145 }
6146 else
6147 /* There is no way to make a variable-sized class type in GNU C++. */
6151 {
6154 {
6156 {
6159 }
6161 {
6163 "scalar object %qD requires one element in "
6167 }
6168 }
6169 }
6172 {
6179 }
6181 ;
6184 {
6186 {
6189 }
6192 /* Do not reshape constructors of vectors (they don't need to be
6193 reshaped. */
6195 {
6197 {
6199 tf_warning_or_error);
6201 }
6203 {
6204 /* Don't reshape if the class has constructors. */
6207 "in C++98 %qD must be initialized by "
6209 decl);
6210 }
6212 {
6215 }
6216 else
6217 {
6220 }
6221 }
6225 {
6228 /* We get here with code like `int a (2);' */
6230 tf_warning_or_error);
6231 }
6233 /* If DECL has an array type without a specific bound, deduce the
6234 array size from the initializer. */
6248 {
6251 /* A constructor call is a non-trivial initializer even if
6252 it isn't explicitly written. */
6256 /* If this is a constexpr initializer, expand_default_init will
6257 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6258 case, pull the initializer back out and pass it down into
6259 store_init_value. */
6264 {
6267 /* Don't call digest_init; it's unnecessary and will complain
6268 about aggregate initialization of non-aggregate classes. */
6270 }
6272 {
6273 /* Declared constexpr, but no suitable initializer; massage
6274 init appropriately so we can pass it into store_init_value
6275 for the error. */
6278 {
6282 }
6284 }
6285 else
6287 }
6290 {
6291 /* In aggregate initialization of a variable, each element
6292 initialization is a full-expression because there is no
6293 enclosing expression. */
6308 }
6309 }
6310 else
6311 {
6319 }
6325 {
6326 /* We might have set these in cp_finish_decl. */
6329 }
6333 {
6341 else
6345 {
6349 }
6351 }
6354 }
6356 /* If DECL is not a local variable, give it RTL. */
6358 static void
6360 {
6364 /* Set the DECL_ASSEMBLER_NAME for the object. */
6366 {
6367 /* The `register' keyword, when used together with an
6368 asm-specification, indicates that the variable should be
6369 placed in a particular register. */
6371 {
6374 }
6375 else
6376 {
6381 }
6382 }
6384 /* Handle non-variables up front. */
6386 {
6389 }
6391 /* If we see a class member here, it should be a static data
6392 member. */
6394 {
6396 /* An in-class declaration of a static data member should be
6397 external; it is only a declaration, and not a definition. */
6402 }
6404 /* We don't create any RTL for local variables. */
6408 /* We defer emission of local statics until the corresponding
6409 DECL_EXPR is expanded. But with constexpr its function might never
6410 be expanded, so go ahead and tell cgraph about the variable now. */
6415 /* Defer template instantiations. */
6420 /* If we're not deferring, go ahead and assemble the variable. */
6423 }
6425 /* walk_tree helper for wrap_temporary_cleanups, below. */
6427 static tree
6429 {
6430 /* Stop at types or full-expression boundaries. */
6433 {
6436 }
6439 {
6444 /* Tell honor_protect_cleanup_actions to handle this as a separate
6445 cleanup. */
6449 }
6452 }
6454 /* We're initializing a local variable which has a cleanup GUARD. If there
6455 are any temporaries used in the initializer INIT of this variable, we
6456 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6457 variable will be cleaned up properly if one of them throws.
6459 Unfortunately, there's no way to express this properly in terms of
6460 nesting, as the regions for the temporaries overlap the region for the
6461 variable itself; if there are two temporaries, the variable needs to be
6462 the first thing destroyed if either of them throws. However, we only
6463 want to run the variable's cleanup if it actually got constructed. So
6464 we need to guard the temporary cleanups with the variable's cleanup if
6465 they are run on the normal path, but not if they are run on the
6466 exceptional path. We implement this by telling
6467 honor_protect_cleanup_actions to strip the variable cleanup from the
6468 exceptional path. */
6470 static void
6472 {
6474 }
6476 /* Generate code to initialize DECL (a local variable). */
6478 static void
6480 {
6482 tree cleanup;
6490 {
6491 /* If we used it already as memory, it must stay in memory. */
6495 }
6500 /* Compute and store the initial value. */
6505 /* Generate a cleanup, if necessary. */
6508 /* Perform the initialization. */
6510 {
6514 {
6515 /* Stick simple initializers in DECL_INITIAL so that
6516 -Wno-init-self works (c++/34772). */
6521 {
6525 OPT_Winit_self,
6527 }
6528 }
6529 else
6530 {
6533 /* If we're only initializing a single object, guard the
6534 destructors of any temporaries used in its initializer with
6535 its destructor. This isn't right for arrays because each
6536 element initialization is a full-expression. */
6545 saved_stmts_are_full_exprs_p;
6546 }
6547 }
6549 /* Set this to 0 so we can tell whether an aggregate which was
6550 initialized was ever used. Don't do this if it has a
6551 destructor, so we don't complain about the 'resource
6552 allocation is initialization' idiom. Now set
6553 attribute((unused)) on types so decls of that type will be
6554 marked used. (see TREE_USED, above.) */
6556 && ! already_used
6565 }
6567 /* DECL is a VAR_DECL for a compiler-generated variable with static
6568 storage duration (like a virtual table) whose initializer is a
6569 compile-time constant. Initialize the variable and provide it to the
6570 back end. */
6572 void
6574 {
6575 tree init;
6585 }
6587 /* INIT is the initializer for a variable, as represented by the
6588 parser. Returns true iff INIT is type-dependent. */
6590 static bool
6592 {
6594 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6597 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6598 {
6611 }
6612 else
6613 /* It must be a simple expression, e.g., int i = 3; */
6617 }
6619 /* INIT is the initializer for a variable, as represented by the
6620 parser. Returns true iff INIT is value-dependent. */
6622 static bool
6624 {
6626 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6629 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6630 {
6640 }
6641 else
6642 /* It must be a simple expression, e.g., int i = 3; */
6646 }
6648 // Returns true if a DECL is VAR_DECL with the concept specifier.
6651 {
6653 // Not all variables have DECL_LANG_SPECIFIC.
6656 }
6658 /* A helper function to be called via walk_tree. If any label exists
6659 under *TP, it is (going to be) forced. Set has_forced_label_in_static. */
6661 static tree
6663 {
6669 }
6671 /* Finish processing of a declaration;
6672 install its line number and initial value.
6673 If the length of an array type is not known before,
6674 it must be determined now, from the initial value, or it is an error.
6676 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6677 true, then INIT is an integral constant expression.
6679 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6680 if the (init) syntax was used. */
6682 void
6685 {
6686 tree type;
6691 tree auto_node;
6696 {
6700 }
6703 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6710 /* Warn about register storage specifiers except when in GNU global
6711 or local register variable extension. */
6713 {
6716 "ISO C++17 does not allow %<register%> storage "
6718 else
6721 }
6723 /* If a name was specified, get the string. */
6738 {
6739 tree d_init;
6741 {
6745 {
6746 /* init is null because we're deferring instantiating the
6747 initializer until we need it. Well, we need it now. */
6750 }
6753 }
6756 {
6760 tf_warning_or_error);
6762 }
6772 {
6777 }
6779 }
6790 {
6791 tree clone;
6793 {
6794 /* FIXME check this is 1st decl. */
6799 {
6803 }
6805 }
6807 {
6810 else
6812 }
6813 }
6816 {
6818 /* If DECL is a reference, then we want to know whether init is a
6819 reference constant; init_const_expr_p as passed tells us whether
6820 it's an rvalue constant. */
6824 {
6825 /* Set these flags now for templates. We'll update the flags in
6826 store_init_value for instantiations. */
6829 /* FIXME setting TREE_CONSTANT on refs breaks the back end. */
6832 }
6833 }
6836 {
6839 /* Add this declaration to the statement-tree. */
6846 {
6849 }
6851 /* Generally, initializers in templates are expanded when the
6852 template is instantiated. But, if DECL is a variable constant
6853 then it can be used in future constant expressions, so its value
6854 must be available. */
6859 && init_const_expr_p
6864 {
6865 /* This variable seems to be a non-dependent constant, so process
6866 its initializer. If check_initializer returns non-null the
6867 initialization wasn't constant after all. */
6868 tree init_code;
6874 }
6878 {
6879 /* Deduce array size even if the initializer is dependent. */
6881 /* And complain about multiple initializers. */
6885 tf_warning_or_error);
6886 }
6891 }
6893 /* Just store non-static data member initializers for later. */
6897 /* Take care of TYPE_DECLs up front. */
6899 {
6902 {
6906 }
6908 /* If we have installed this as the canonical typedef for this
6909 type, and that type has not been defined yet, delay emitting
6910 the debug information for it, as we will emit it later. */
6916 at_eof);
6918 }
6920 /* A reference will be modified here, as it is initialized. */
6924 {
6927 }
6930 {
6931 /* If this is a local variable that will need a mangled name,
6932 register it now. We must do this before processing the
6933 initializer for the variable, since the initialization might
6934 require a guard variable, and since the mangled name of the
6935 guard variable will depend on the mangled name of this
6936 variable. */
6940 {
6942 /* Normally has_forced_label_in_static is set during GIMPLE
6943 lowering, but [cd]tors are never actually compiled directly.
6944 We need to set this early so we can deal with the label
6945 address extension. */
6949 {
6952 }
6953 /* And make sure it's in the symbol table for
6954 c_parse_final_cleanups to find. */
6956 }
6958 /* Convert the initializer to the type of DECL, if we have not
6959 already initialized DECL. */
6961 /* If !DECL_EXTERNAL then DECL is being defined. In the
6962 case of a static data member initialized inside the
6963 class-specifier, there can be an initializer even if DECL
6964 is *not* defined. */
6966 {
6970 /* Handle:
6972 [dcl.init]
6974 The memory occupied by any object of static storage
6975 duration is zero-initialized at program startup before
6976 any other initialization takes place.
6978 We cannot create an appropriate initializer until after
6979 the type of DECL is finalized. If DECL_INITIAL is set,
6980 then the DECL is statically initialized, and any
6981 necessary zero-initialization has already been performed. */
6986 /* Remember that the initialization for this variable has
6987 taken place. */
6989 /* This declaration is the definition of this variable,
6990 unless we are initializing a static data member within
6991 the class specifier. */
6994 }
6995 /* If the variable has an array type, lay out the type, even if
6996 there is no initializer. It is valid to index through the
6997 array, and we must get TYPE_ALIGN set correctly on the array
6998 type. */
7005 /* So decl is a global variable or a static member of a
7006 non local class. Record the types it uses
7007 so that we can decide later to emit debug info for them. */
7009 }
7011 /* Add this declaration to the statement-tree. This needs to happen
7012 after the call to check_initializer so that the DECL_EXPR for a
7013 reference temp is added before the DECL_EXPR for the reference itself. */
7015 {
7016 /* If we're building a variable sized type, and we might be
7017 reachable other than via the top of the current binding
7018 level, then create a new BIND_EXPR so that we deallocate
7019 the object at the right time. */
7024 {
7025 tree bind;
7030 }
7032 }
7034 /* Let the middle end know about variables and functions -- but not
7035 static data members in uninstantiated class templates. */
7037 {
7039 {
7042 }
7044 /* This needs to happen after the linkage is set. */
7048 {
7049 /* If a TREE_READONLY variable needs initialization
7050 at runtime, it is no longer readonly and we need to
7051 avoid MEM_READONLY_P being set on RTL created for it. */
7053 {
7057 }
7061 /* Likewise if it needs destruction. */
7064 }
7068 /* Check for abstractness of the type. Notice that there is no
7069 need to strip array types here since the check for those types
7070 is already done within create_array_type_for_decl. */
7074 /* No initialization required. */
7075 ;
7077 {
7079 {
7081 {
7082 /* An out-of-class default definition is defined at
7083 the point where it is explicitly defaulted. */
7088 }
7089 else
7091 }
7092 /* else no initialization required. */
7093 }
7097 {
7100 }
7101 /* A variable definition. */
7103 /* Initialize the local variable. */
7106 /* If a variable is defined, and then a subsequent
7107 definition with external linkage is encountered, we will
7108 get here twice for the same variable. We want to avoid
7109 calling expand_static_init more than once. For variables
7110 that are not static data members, we can call
7111 expand_static_init only when we actually process the
7112 initializer. It is not legal to redeclare a static data
7113 member, so this issue does not arise in that case. */
7116 }
7118 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
7119 reference, insert it in the statement-tree now. */
7121 {
7126 }
7132 }
7134 /* For class TYPE return itself or some its bases that contain
7135 any direct non-static data members. Return error_mark_node if an
7136 error has been diagnosed. */
7138 static tree
7140 {
7148 {
7152 else
7157 }
7159 {
7167 }
7168 else
7178 {
7183 {
7185 {
7190 }
7194 /* OK, found the same base along another path. We'll complain
7197 {
7199 "classes %qT and %qT have non-static data "
7202 }
7203 else
7205 }
7206 }
7208 }
7210 /* Return std::tuple_size<TYPE>::value. */
7212 static tree
7214 {
7230 else
7232 }
7234 /* Return std::tuple_element<I,TYPE>::type. */
7236 static tree
7238 {
7246 tf_warning_or_error);
7249 }
7251 /* Return e.get<i>() or get<i>(e). */
7253 static tree
7255 {
7263 /* [The id-expression] e is an lvalue if the type of the entity e is an
7264 lvalue reference and an xvalue otherwise. */
7272 {
7277 }
7278 else
7279 {
7285 }
7286 }
7288 /* It's impossible to recover the decltype of a tuple decomposition variable
7289 based on the actual type of the variable, so store it in a hash table. */
7292 static void
7294 {
7298 }
7300 tree
7302 {
7304 }
7306 /* Finish a decomposition declaration. DECL is the underlying declaration
7307 "e", FIRST is the head of a chain of decls for the individual identifiers
7308 chained through DECL_CHAIN in reverse order and COUNT is the number of
7309 those decls. */
7311 void
7313 {
7315 {
7316 error_out:
7318 {
7321 {
7324 }
7326 }
7330 }
7334 /* This happens for range for when not in templates.
7335 Still add the DECL_VALUE_EXPRs for later processing. */
7336 || (!processing_template_decl
7338 {
7340 {
7342 {
7348 }
7352 }
7354 }
7360 {
7363 }
7369 {
7372 }
7377 {
7378 tree nelts;
7383 {
7386 }
7389 {
7390 cnt_mismatch:
7394 else
7398 }
7401 {
7409 NULL_TREE);
7412 }
7413 }
7414 /* 2 GNU extensions. */
7416 {
7422 {
7430 t);
7433 }
7434 }
7436 {
7442 {
7452 NULL_TREE);
7455 }
7456 }
7458 {
7460 {
7464 }
7470 {
7481 {
7485 }
7486 /* Save the decltype away before reference collapse. */
7492 {
7493 /* In this case the names are variables, not just proxies. */
7496 }
7500 }
7501 /* Ignore reads from the underlying decl performed during initialization
7502 of the individual variables. If those will be read, we'll mark
7503 the underlying decl as read at that point. */
7505 }
7507 {
7510 }
7512 {
7515 }
7517 {
7520 }
7521 else
7522 {
7527 {
7531 }
7535 else
7536 eltscnt++;
7541 {
7545 }
7550 else
7551 {
7553 NULL_TREE);
7559 {
7562 }
7563 i++;
7564 }
7565 }
7567 {
7570 {
7575 }
7576 }
7579 }
7581 /* Returns a declaration for a VAR_DECL as if:
7583 extern "C" TYPE NAME;
7585 had been seen. Used to create compiler-generated global
7586 variables. */
7588 static tree
7590 {
7591 tree decl;
7599 /* If the user has explicitly declared this variable (perhaps
7600 because the code we are compiling is part of a low-level runtime
7601 library), then it is possible that our declaration will be merged
7602 with theirs by pushdecl. */
7608 }
7610 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
7611 if "__cxa_atexit" is not being used) corresponding to the function
7612 to be called when the program exits. */
7614 static tree
7616 {
7617 tree fn_type;
7620 {
7621 tree arg_type;
7624 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
7626 else
7627 /* The parameter to "atexit" is "void (*)(void)". */
7633 }
7636 }
7638 /* Returns a pointer to the `atexit' function. Note that if
7639 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
7640 `__cxa_atexit' function specified in the IA64 C++ ABI. */
7642 static tree
7644 {
7645 tree atexit_fndecl;
7646 tree fn_type;
7647 tree fn_ptr_type;
7655 {
7656 /* The declaration for `__cxa_atexit' is:
7658 int __cxa_atexit (void (*)(void *), void *, void *)
7660 We build up the argument types and then the function type
7661 itself. */
7665 /* First, build the pointer-to-function type for the first
7666 argument. */
7668 /* Then, build the rest of the argument types. */
7671 {
7674 }
7675 else
7676 {
7679 }
7680 /* And the final __cxa_atexit type. */
7683 NULL_TREE);
7686 else
7688 }
7689 else
7690 {
7691 /* The declaration for `atexit' is:
7693 int atexit (void (*)());
7695 We build up the argument types and then the function type
7696 itself. */
7698 /* Build the final atexit type. */
7702 }
7704 /* Now, build the function declaration. */
7712 }
7714 /* Like get_atexit_node, but for thread-local cleanups. */
7716 static tree
7718 {
7719 /* The declaration for `__cxa_thread_atexit' is:
7721 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7725 NULL_TREE);
7727 /* Now, build the function declaration. */
7731 }
7733 /* Returns the __dso_handle VAR_DECL. */
7735 static tree
7737 {
7741 /* Declare the variable. */
7743 ptr_type_node);
7745 #ifdef HAVE_GAS_HIDDEN
7747 {
7750 }
7751 #endif
7754 }
7756 /* Begin a new function with internal linkage whose job will be simply
7757 to destroy some particular variable. */
7761 static tree
7763 {
7765 tree fntype;
7766 tree fndecl;
7772 /* No need to mangle this. */
7775 /* Build the name of the function. */
7777 /* Build the function declaration. */
7780 /* It's a function with internal linkage, generated by the
7781 compiler. */
7784 /* Make the function `inline' so that it is only emitted if it is
7785 actually needed. It is unlikely that it will be inlined, since
7786 it is only called via a function pointer, but we avoid unnecessary
7787 emissions this way. */
7790 /* Build the parameter. */
7792 {
7797 }
7805 }
7807 /* Finish the cleanup function begun by start_cleanup_fn. */
7809 static void
7811 {
7815 }
7817 /* Generate code to handle the destruction of DECL, an object with
7818 static storage duration. */
7820 tree
7822 {
7823 tree cleanup;
7824 tree addr;
7825 tree compound_stmt;
7826 tree fcall;
7827 tree type;
7830 tree atex_node;
7836 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7837 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7838 destructor to "__cxa_atexit"; we don't have to build a temporary
7839 function to do the cleanup. */
7840 dso_parm = (flag_use_cxa_atexit
7845 {
7848 /* Make sure it is accessible. */
7850 tf_warning_or_error);
7851 }
7852 else
7853 {
7854 /* Call build_cleanup before we enter the anonymous function so
7855 that any access checks will be done relative to the current
7856 scope, rather than the scope of the anonymous function. */
7859 /* Now start the function. */
7862 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7863 to the original function, rather than the anonymous one. That
7864 will make the back end think that nested functions are in use,
7865 which causes confusion. */
7870 /* Create the body of the anonymous function. */
7875 }
7877 /* Call atexit with the cleanup function. */
7883 else
7887 {
7888 /* We must convert CLEANUP to the type that "__cxa_atexit"
7889 expects. */
7891 /* "__cxa_atexit" will pass the address of DECL to the
7892 cleanup function. */
7895 /* The declared type of the parameter to "__cxa_atexit" is
7896 "void *". For plain "T*", we could just let the
7897 machinery in cp_build_function_call convert it -- but if the
7898 type is "cv-qualified T *", then we need to convert it
7899 before passing it in, to avoid spurious errors. */
7901 }
7902 else
7903 /* Since the cleanup functions we build ignore the address
7904 they're given, there's no reason to pass the actual address
7905 in, and, in general, it's cheaper to pass NULL than any
7906 other value. */
7911 tf_warning_or_error);
7913 /* Just pass NULL to the dso handle parm if we don't actually
7914 have a DSO handle on this target. */
7916 else
7920 {
7923 {
7926 }
7927 else
7928 {
7931 }
7932 }
7933 else
7934 {
7937 }
7940 }
7942 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7943 is its initializer. Generate code to handle the construction
7944 and destruction of DECL. */
7946 static void
7948 {
7952 /* Some variables require no dynamic initialization. */
7954 {
7955 /* Make sure the destructor is callable. */
7959 }
7963 {
7967 else
7972 {
7974 "C++11 %<thread_local%> allows dynamic initialization "
7977 }
7979 }
7982 {
7983 /* Emit code to perform this initialization but once. */
7988 /* We don't need thread-safety code for thread-local vars. */
7992 /* Emit code to perform this initialization but once. This code
7993 looks like:
7995 static <type> guard;
7996 if (!__atomic_load (guard.first_byte)) {
7997 if (__cxa_guard_acquire (&guard)) {
7998 bool flag = false;
7999 try {
8000 // Do initialization.
8001 flag = true; __cxa_guard_release (&guard);
8002 // Register variable for destruction at end of program.
8003 } catch {
8004 if (!flag) __cxa_guard_abort (&guard);
8005 }
8006 }
8007 }
8009 Note that the `flag' variable is only set to 1 *after* the
8010 initialization is complete. This ensures that an exception,
8011 thrown during the construction, will cause the variable to
8012 reinitialized when we pass through this code again, as per:
8014 [stmt.dcl]
8016 If the initialization exits by throwing an exception, the
8017 initialization is not complete, so it will be tried again
8018 the next time control enters the declaration.
8020 This process should be thread-safe, too; multiple threads
8021 should not be able to initialize the variable more than
8022 once. */
8024 /* Create the guard variable. */
8027 /* Begin the conditional initialization. */
8034 {
8047 acquire_fn = push_library_fn
8050 NULL_TREE),
8055 NULL_TREE);
8065 inner_if_stmt);
8073 void_node,
8077 /* Do the initialization itself. */
8079 init = add_stmt_to_compound
8081 init = add_stmt_to_compound
8083 }
8084 else
8087 /* Use atexit to register a function for destroying this static
8088 variable. */
8094 {
8098 }
8103 }
8106 else
8108 }
8110 \f
8111 /* Make TYPE a complete type based on INITIAL_VALUE.
8112 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8113 2 if there was no information (in which case assume 0 if DO_DEFAULT),
8114 3 if the initializer list is empty (in pedantic mode). */
8116 int
8118 {
8122 /* Don't get confused by a CONSTRUCTOR for some other type. */
8129 {
8131 tree value;
8133 /* An array of character type can be initialized from a
8134 brace-enclosed string constant.
8136 FIXME: this code is duplicated from reshape_init. Probably
8137 we should just call reshape_init here? */
8141 {
8148 }
8150 /* If any of the elements are parameter packs, we can't actually
8151 complete this type now because the array size is dependent. */
8153 {
8156 {
8159 }
8160 }
8161 }
8165 /* We can create the array before the element type is complete, which
8166 means that we didn't have these two bits set in the original type
8167 either. In completing the type, we are expected to propagate these
8168 bits. See also complete_type which does the same thing for arrays
8169 of fixed size. */
8172 {
8177 }
8180 }
8182 /* As above, but either give an error or reject zero-size arrays, depending
8183 on COMPLAIN. */
8185 int
8188 {
8191 /* In SFINAE context we can't be lenient about zero-size arrays. */
8198 {
8204 {
8207 }
8211 }
8213 }
8214 \f
8215 /* Return zero if something is declared to be a member of type
8216 CTYPE when in the context of CUR_TYPE. STRING is the error
8217 message to print in that case. Otherwise, quietly return 1. */
8219 static int
8221 {
8223 {
8226 else
8229 }
8231 }
8232 \f
8233 /* Subroutine of `grokdeclarator'. */
8235 /* Generate errors possibly applicable for a given set of specifiers.
8236 This is for ARM $7.1.2. */
8238 static void
8246 {
8248 {
8285 }
8289 && !flag_noexcept_type
8295 }
8297 /* DECL is a member function or static data member and is presently
8298 being defined. Check that the definition is taking place in a
8299 valid namespace. */
8301 static void
8303 {
8304 /* These checks only apply to member functions and static data
8305 members. */
8307 /* We check for problems with specializations in pt.c in
8308 check_specialization_namespace, where we can issue better
8309 diagnostics. */
8312 /* We check this in check_explicit_instantiation_namespace. */
8315 /* [class.mfct]
8317 A member function definition that appears outside of the
8318 class definition shall appear in a namespace scope enclosing
8319 the class definition.
8321 [class.static.data]
8323 The definition for a static data member shall appear in a
8324 namespace scope enclosing the member's class definition. */
8328 }
8330 /* Build a PARM_DECL for the "this" parameter of FN. TYPE is the
8331 METHOD_TYPE for a non-static member function; QUALS are the
8332 cv-qualifiers that apply to the function. */
8334 tree
8336 {
8337 tree this_type;
8338 tree qual_type;
8339 tree parm;
8340 cp_cv_quals this_quals;
8343 {
8344 this_type
8347 }
8348 else
8350 /* The `this' parameter is implicitly `const'; it cannot be
8351 assigned to. */
8357 }
8359 /* DECL is a static member function. Complain if it was declared
8360 with function-cv-quals. */
8362 static void
8364 {
8367 decl);
8368 }
8370 // Check that FN takes no arguments and returns bool.
8371 static void
8373 {
8374 // A constraint is nullary.
8378 // The declared return type of the concept shall be bool, and
8379 // it shall not be deduced from it definition.
8385 }
8387 /* Helper function. Replace the temporary this parameter injected
8388 during cp_finish_omp_declare_simd with the real this parameter. */
8390 static tree
8392 {
8401 }
8403 /* CTYPE is class type, or null if non-class.
8404 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8405 or METHOD_TYPE.
8406 DECLARATOR is the function's name.
8407 PARMS is a chain of PARM_DECLs for the function.
8408 VIRTUALP is truthvalue of whether the function is virtual or not.
8409 FLAGS are to be passed through to `grokclassfn'.
8410 QUALS are qualifiers indicating whether the function is `const'
8411 or `volatile'.
8412 RAISES is a list of exceptions that this function can raise.
8413 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8414 not look, and -1 if we should not call `grokclassfn' at all.
8416 SFK is the kind of special function (if any) for the new function.
8418 Returns `NULL_TREE' if something goes wrong, after issuing
8419 applicable error messages. */
8421 static tree
8423 tree type,
8424 tree declarator,
8425 tree parms,
8426 tree orig_declarator,
8427 tree decl_reqs,
8430 cp_cv_quals quals,
8431 cp_ref_qualifier rqual,
8432 tree raises,
8438 special_function_kind sfk,
8441 tree in_namespace,
8443 location_t location)
8444 {
8445 tree decl;
8447 tree t;
8449 // Was the concept specifier present?
8452 // Concept declarations must have a corresponding definition.
8454 {
8457 }
8466 /* Set the constraints on the declaration. */
8468 {
8473 /* Adjust the required expression into a constraint. */
8479 }
8481 /* If we have an explicit location, use it, otherwise use whatever
8482 build_lang_decl used (probably input_location). */
8487 {
8492 /* Allocate space to hold the vptr bit if needed. */
8494 }
8500 /* Propagate volatile out from type to decl. */
8504 /* Setup decl according to sfk. */
8506 {
8519 }
8522 {
8525 orig_declarator);
8526 else
8527 {
8532 {
8533 /* Something like `template <class T> friend void f<T>()'. */
8536 orig_declarator);
8538 }
8541 /* A friend declaration of the form friend void f<>(). Record
8542 the information in the TEMPLATE_ID_EXPR. */
8551 {
8554 decl);
8556 }
8559 {
8562 decl);
8564 }
8565 }
8566 }
8568 /* If this decl has namespace scope, set that up. */
8574 /* `main' and builtins have implicit 'C' linkage. */
8589 /* Should probably propagate const out from type to decl I bet (mrs). */
8591 {
8594 }
8600 {
8604 }
8607 {
8618 }
8620 /* Members of anonymous types and local classes have no linkage; make
8621 them internal. If a typedef is made later, this will be changed. */
8627 {
8628 /* [basic.link]: A name with no linkage (notably, the name of a class
8629 or enumeration declared in a local scope) shall not be used to
8630 declare an entity with linkage.
8632 DR 757 relaxes this restriction for C++0x. */
8634 }
8638 {
8641 }
8643 /* If the declaration was declared inline, mark it as such. */
8645 {
8649 }
8653 // If the concept declaration specifier was found, check
8654 // that the declaration satisfies the necessary requirements.
8656 {
8659 }
8663 {
8666 TYPE_UNQUALIFIED,
8667 REF_QUAL_NONE);
8670 {
8674 decl);
8676 }
8679 {
8683 decl);
8685 }
8686 }
8689 {
8691 {
8695 }
8699 }
8704 {
8708 /* [over.literal]/6: Literal operators shall not have C linkage. */
8710 {
8714 }
8717 {
8720 {
8723 }
8727 {
8731 }
8733 {
8737 }
8738 }
8739 else
8740 {
8743 }
8744 }
8747 /* Make the init_value nonzero so pushdecl knows this is not
8748 tentative. error_mark_node is replaced later with the BLOCK. */
8755 {
8756 /* Adjust "omp declare simd" attributes. */
8759 {
8760 tree attr;
8763 {
8768 {
8770 cl = c_omp_declare_simd_clauses_to_numbers
8774 else
8776 }
8777 }
8778 }
8779 }
8781 /* Caller will do the rest of this. */
8788 /* 12.4/3 */
8796 template_count,
8807 {
8810 }
8812 /* Check main's type after attributes have been applied. */
8814 {
8816 integer_type_node))
8817 {
8819 tree newtype;
8823 }
8826 }
8829 {
8831 (processing_template_decl
8833 ? current_template_parms
8840 {
8841 tree ok;
8842 tree pushed_scope;
8845 /* Because grokfndecl is always supposed to return a
8846 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8847 here. We depend on our callers to figure out that its
8848 really a template that's being returned. */
8853 {
8854 /* Remove the `this' parm added by grokclassfn. */
8857 }
8859 {
8862 }
8864 {
8869 }
8871 /* Since we've smashed OLD_DECL to its
8872 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8876 /* Attempt to merge the declarations. This can fail, in
8877 the case of some invalid specialization declarations. */
8883 {
8887 }
8891 }
8892 }
8904 }
8906 /* decl is a FUNCTION_DECL.
8907 specifiers are the parsed virt-specifiers.
8909 Set flags to reflect the virt-specifiers.
8911 Returns decl. */
8913 static tree
8915 {
8923 }
8925 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8926 the linkage that DECL will receive in the object file. */
8928 static void
8930 {
8931 /* A static data member always has static storage duration and
8932 external linkage. Note that static data members are forbidden in
8933 local classes -- the only situation in which a class has
8934 non-external linkage. */
8937 /* For non-template classes, static data members are always put
8938 out in exactly those files where they are defined, just as
8939 with ordinary namespace-scope variables. */
8942 }
8944 /* Create a VAR_DECL named NAME with the indicated TYPE.
8946 If SCOPE is non-NULL, it is the class type or namespace containing
8947 the variable. If SCOPE is NULL, the variable should is created in
8948 the innermost enclosing scope. */
8950 static tree
8952 tree name,
8953 tree orig_declarator,
8960 tree scope)
8961 {
8962 tree decl;
8963 tree explicit_scope;
8970 /* Compute the scope in which to place the variable, but remember
8971 whether or not that scope was explicitly specified by the user. */
8974 {
8975 /* An explicit "extern" specifier indicates a namespace-scope
8976 variable. */
8981 }
8985 template, we need DECL_LANG_SPECIFIC. */
8987 /* Similarly for namespace-scope variables with language linkage
8988 other than C++. */
8991 /* Similarly for static data members. */
8993 /* Similarly for explicit specializations. */
8994 || (orig_declarator
8997 else
9002 else
9006 {
9009 }
9012 {
9014 /* This function is only called with out-of-class definitions. */
9017 }
9018 /* At top level, either `static' or no s.c. makes a definition
9019 (perhaps tentative), and absence of `static' makes it public. */
9021 {
9024 || ! constp
9025 || volatilep
9028 }
9029 /* Not at top level, only `static' makes a static definition. */
9030 else
9031 {
9034 }
9037 {
9039 {
9043 }
9046 }
9048 /* If the type of the decl has no linkage, make sure that we'll
9049 notice that in mark_used. */
9058 {
9059 /* [basic.link]: A name with no linkage (notably, the name of a class
9060 or enumeration declared in a local scope) shall not be used to
9061 declare an entity with linkage.
9063 DR 757 relaxes this restriction for C++0x. */
9066 }
9067 else
9075 /* Check that the variable can be safely declared as a concept.
9076 Note that this also forbids explicit specializations. */
9078 {
9080 {
9083 }
9084 else
9089 }
9092 {
9096 }
9098 // Handle explicit specializations and instantiations of variable templates.
9104 }
9106 /* Create and return a canonical pointer to member function type, for
9107 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
9109 tree
9111 {
9113 tree t;
9118 /* Make sure that we always have the unqualified pointer-to-member
9119 type first. */
9121 {
9124 }
9126 /* If a canonical type already exists for this type, use it. We use
9127 this method instead of type_hash_canon, because it only does a
9128 simple equality check on the list of field members. */
9136 /* Let the front end know this is a pointer to member function. */
9143 delta_type_node);
9149 /* Zap out the name so that the back end will give us the debugging
9150 information for this anonymous RECORD_TYPE. */
9153 /* Cache this pointer-to-member type so that we can find it again
9154 later. */
9163 }
9165 /* Create and return a pointer to data member type. */
9167 tree
9169 {
9171 {
9176 }
9177 else
9178 {
9181 }
9182 }
9184 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
9185 Check to see that the definition is valid. Issue appropriate error
9186 messages. Return 1 if the definition is particularly bad, or 0
9187 otherwise. */
9189 static int
9191 {
9192 /* Avoid redundant diagnostics on out-of-class definitions. */
9195 /* Can't check yet if we don't know the type. */
9198 /* If DECL is declared constexpr, we'll do the appropriate checks
9199 in check_initializer. Similarly for inline static data members. */
9205 {
9208 "in-class initialization of static data member %q#D of "
9212 "%<constexpr%> needed for in-class initialization of "
9214 else
9216 "in-class initialization of static data member %q#D of "
9219 }
9221 /* Motion 10 at San Diego: If a static const integral data member is
9222 initialized with an integral constant expression, the initializer
9223 may appear either in the declaration (within the class), or in
9224 the definition, but not both. If it appears in the class, the
9225 member is a member constant. The file-scope definition is always
9226 required. */
9228 {
9230 "invalid in-class initialization of static data member "
9232 type);
9234 }
9237 "ISO C++ forbids in-class initialization of non-const "
9239 decl);
9242 "ISO C++ forbids initialization of member constant "
9246 }
9248 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
9249 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
9250 expressions out into temporary variables so that walk_tree doesn't
9251 step into them (c++/15764). */
9253 static tree
9255 {
9259 {
9265 }
9269 }
9271 /* Entry point for the above. */
9273 static void
9275 {
9277 /* Break out any function calls into temporary variables. */
9279 }
9281 /* Reduce a SIZEOF_EXPR to its value. */
9283 tree
9285 {
9286 tree r;
9293 else
9299 }
9301 /* Given the SIZE (i.e., number of elements) in an array, compute
9302 an appropriate index type for the array. If non-NULL, NAME is
9303 the name of the entity being declared. */
9305 tree
9307 {
9308 tree itype;
9315 {
9322 /* In C++98, we mark a non-constant array bound with a magic
9324 else
9325 {
9330 {
9333 {
9339 else
9342 }
9346 }
9353 }
9358 /* The array bound must be an integer type. */
9360 {
9365 else
9369 }
9370 }
9372 /* A type is dependent if it is...an array type constructed from any
9373 dependent type or whose size is specified by a constant expression
9374 that is value-dependent. */
9375 /* We can only call value_dependent_expression_p on integral constant
9376 expressions; treat non-constant expressions as dependent, too. */
9380 {
9381 /* We cannot do any checking for a SIZE that isn't known to be
9382 constant. Just build the index type and mark that it requires
9383 structural equality checks. */
9390 }
9393 {
9398 /* Use the folded result for VLAs, too; it will have resolved
9399 SIZEOF_EXPR. */
9401 }
9403 /* Normally, the array-bound will be a constant. */
9405 {
9406 /* Check to see if the array bound overflowed. Make that an
9407 error, no matter how generous we're being. */
9410 /* An array must have a positive number of elements. */
9412 {
9417 else
9420 }
9421 /* As an extension we allow zero-sized arrays. */
9423 {
9425 /* We must fail if performing argument deduction (as
9426 indicated by the state of complain), so that
9427 another substitution can be found. */
9433 else
9435 }
9436 }
9438 /* We don't allow VLAs at non-function scopes, or during
9439 tentative template substitution. */
9442 {
9445 /* `(int) &fn' is not a valid array bound. */
9448 name);
9449 else
9452 }
9454 {
9457 else
9459 }
9461 {
9465 else
9468 }
9471 /* A variable sized array. */
9473 else
9474 {
9475 /* Compute the index of the largest element in the array. It is
9476 one less than the number of elements in the array. We save
9477 and restore PROCESSING_TEMPLATE_DECL so that computations in
9478 cp_build_binary_op will be appropriately folded. */
9479 {
9480 processing_template_decl_sentinel s;
9482 MINUS_EXPR,
9485 complain),
9486 complain);
9488 }
9491 {
9492 /* A variable sized array. */
9499 {
9500 /* We have to add 1 -- in the ubsan routine we generate
9501 LE_EXPR rather than LT_EXPR. */
9506 }
9507 }
9508 /* Make sure that there was no overflow when creating to a signed
9509 index type. (For example, on a 32-bit machine, an array with
9510 size 2^32 - 1 is too big.) */
9513 {
9518 }
9519 }
9521 /* Create and return the appropriate index type. */
9524 /* If the index type were dependent, we would have returned early, so
9525 remember that it isn't. */
9529 }
9531 /* Returns the scope (if any) in which the entity declared by
9532 DECLARATOR will be located. If the entity was declared with an
9533 unqualified name, NULL_TREE is returned. */
9535 tree
9537 {
9541 /* If the declarator-id is a SCOPE_REF, the scope in which the
9542 declaration occurs is the first operand. */
9547 /* Otherwise, the declarator is not a qualified name; the entity will
9548 be declared in the current scope. */
9550 }
9552 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
9553 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
9554 with this type. */
9556 static tree
9558 {
9561 /* If things have already gone awry, bail now. */
9565 /* 8.3.4/1: If the type of the identifier of D contains the auto
9566 type-specifier, the program is ill-formed. */
9568 {
9571 }
9573 /* If there are some types which cannot be array elements,
9574 issue an error-message and return. */
9576 {
9580 else
9587 else
9594 else
9601 else
9607 }
9609 /* [dcl.array]
9611 The constant expressions that specify the bounds of the arrays
9612 can be omitted only for the first member of the sequence. */
9614 {
9618 name);
9619 else
9624 }
9626 /* Figure out the index type for the array. */
9630 /* [dcl.array]
9631 T is called the array element type; this type shall not be [...] an
9632 abstract class type. */
9636 }
9638 /* Returns the smallest location != UNKNOWN_LOCATION among the
9639 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
9640 and LOCATIONS[ds_restrict]. */
9642 static location_t
9644 {
9659 }
9661 /* Check that it's OK to declare a function with the indicated TYPE
9662 and TYPE_QUALS. SFK indicates the kind of special function (if any)
9663 that this function is. OPTYPE is the type given in a conversion
9664 operator declaration, or the class type for a constructor/destructor.
9665 Returns the actual return type of the function; that may be different
9666 than TYPE if an error occurs, or for certain special functions. */
9668 static tree
9670 tree type,
9671 tree optype,
9674 {
9676 {
9686 else
9697 /* We can't use the proper return type here because we run into
9698 problems with ambiguous bases and covariant returns. */
9701 else
9710 "qualifiers are not allowed on declaration of "
9721 "qualifiers are not allowed on declaration of "
9732 }
9735 }
9737 /* A variable or data member (whose unqualified name is IDENTIFIER)
9738 has been declared with the indicated TYPE. If the TYPE is not
9739 acceptable, issue an error message and return a type to use for
9740 error-recovery purposes. */
9742 tree
9744 {
9746 {
9750 {
9753 }
9754 else
9757 }
9760 }
9762 /* Handle declaring DECL as an inline variable. */
9764 static void
9766 {
9769 {
9773 }
9776 "inline variables are only available "
9779 {
9782 }
9783 }
9786 /* Assign a typedef-given name to a class or enumeration type declared
9787 as anonymous at first. This was split out of grokdeclarator
9788 because it is also used in libcc1. */
9790 void
9792 {
9795 /* Replace the anonymous name with the real name everywhere. */
9797 {
9799 /* We do not rename the debug info representing the
9800 unnamed tagged type because the standard says in
9801 [dcl.typedef] that the naming applies only for
9802 linkage purposes. */
9803 /*debug_hooks->set_name (t, decl);*/
9805 }
9810 /* If this is a typedef within a template class, the nested
9811 type is a (non-primary) template. The name for the
9812 template needs updating as well. */
9817 /* Adjust linkage now that we aren't unnamed anymore. */
9820 /* FIXME remangle member functions; member functions of a
9821 type with external linkage have external linkage. */
9823 /* Check that our job is done, and that it would fail if we
9824 attempted to do it again. */
9826 }
9828 /* Given declspecs and a declarator (abstract or otherwise), determine
9829 the name and type of the object declared and construct a DECL node
9830 for it.
9832 DECLSPECS points to the representation of declaration-specifier
9833 sequence that precedes declarator.
9835 DECL_CONTEXT says which syntactic context this declaration is in:
9836 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9837 FUNCDEF for a function definition. Like NORMAL but a few different
9838 error messages in each case. Return value may be zero meaning
9839 this definition is too screwy to try to parse.
9840 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9841 handle member functions (which have FIELD context).
9842 Return value may be zero meaning this definition is too screwy to
9843 try to parse.
9844 PARM for a parameter declaration (either within a function prototype
9845 or before a function body). Make a PARM_DECL, or return void_type_node.
9846 TPARM for a template parameter declaration.
9847 CATCHPARM for a parameter declaration before a catch clause.
9848 TYPENAME if for a typename (in a cast or sizeof).
9849 Don't make a DECL node; just return the ..._TYPE node.
9850 FIELD for a struct or union field; make a FIELD_DECL.
9851 BITFIELD for a field with specified width.
9853 INITIALIZED is as for start_decl.
9855 ATTRLIST is a pointer to the list of attributes, which may be NULL
9856 if there are none; *ATTRLIST may be modified if attributes from inside
9857 the declarator should be applied to the declaration.
9859 When this function is called, scoping variables (such as
9860 CURRENT_CLASS_TYPE) should reflect the scope in which the
9861 declaration occurs, not the scope in which the new declaration will
9862 be placed. For example, on:
9864 void S::f() { ... }
9866 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
9867 should not be `S'.
9869 Returns a DECL (if a declarator is present), a TYPE (if there is no
9870 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
9871 error occurs. */
9873 tree
9879 {
9891 /* True if this declarator is a function definition. */
9895 #if 0
9896 /* See the code below that used this. */
9898 #endif
9900 /* Keep track of what sort of function is being processed
9901 so that we can warn about default return values, or explicit
9902 return values which do not match prescribed defaults. */
9908 /* cv-qualifiers that apply to the declarator, for a declaration of
9909 a member function. */
9911 /* virt-specifiers that apply to the declarator, for a declaration of
9912 a member function. */
9914 /* ref-qualifier that applies to the declarator, for a declaration of
9915 a member function. */
9917 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
9924 /* The unqualified name of the declarator; either an
9925 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
9926 tree unqualified_id;
9927 /* The class type, if any, in which this entity is located,
9928 or NULL_TREE if none. Note that this value may be different from
9929 the current class type; for example if an attempt is made to declare
9930 "A::f" inside "B", this value will be "A". */
9932 /* The NAMESPACE_DECL for the namespace in which this entity is
9933 located. If an unqualified name is used to declare the entity,
9934 this value will be NULL_TREE, even if the entity is located at
9935 namespace scope. */
9937 cp_storage_class storage_class;
9958 // Was concept_p specified? Note that ds_concept
9959 // implies ds_constexpr!
9992 /* Look inside a declarator for the name being declared
9993 and get it as a string, for an error message. */
9995 id_declarator;
9997 {
10002 {
10006 {
10010 }
10014 {
10020 {
10022 {
10023 /* [dcl.meaning]
10025 A declarator-id shall not be qualified except
10026 for ...
10028 None of the cases are permitted in block
10029 scope. */
10032 decl);
10036 else
10040 }
10042 {
10045 {
10048 }
10050 && current_class_type
10052 current_class_type))
10053 {
10057 }
10058 }
10061 }
10063 {
10065 {
10067 {
10070 }
10073 {
10076 }
10083 }
10087 {
10093 }
10094 /* Fall through. */
10101 {
10103 dname);
10105 }
10108 else
10109 {
10116 else
10118 }
10123 }
10125 }
10142 }
10145 }
10147 /* [dcl.fct.edf]
10149 The declarator in a function-definition shall have the form
10150 D1 ( parameter-declaration-clause) ... */
10152 {
10155 }
10160 {
10163 }
10166 {
10169 {
10172 }
10175 {
10177 {
10180 }
10182 {
10185 }
10186 }
10187 }
10189 /* Anything declared one level down from the top level
10190 must be one of the parameters of a function
10191 (because the body is at least two levels down). */
10193 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
10194 by not allowing C++ class definitions to specify their parameters
10195 with xdecls (must be spec.d in the parmlist).
10197 Since we now wait to push a class scope until we are sure that
10198 we are in a legitimate method context, we must set oldcname
10199 explicitly (since current_class_name is not yet alive).
10201 We also want to avoid calling this a PARM if it is in a namespace. */
10204 {
10210 }
10216 {
10219 }
10222 {
10225 }
10227 /* If there were multiple types specified in the decl-specifier-seq,
10228 issue an error message. */
10230 {
10233 }
10236 {
10239 }
10241 /* Extract the basic type from the decl-specifier-seq. */
10244 {
10247 }
10248 /* If the entire declaration is itself tagged as deprecated then
10249 suppress reports of deprecated items. */
10254 {
10261 }
10262 /* No type at all: default to `int', and set DEFAULTED_INT
10263 because it was not a user-defined typedef. */
10265 {
10267 {
10268 /* These imply 'int'. */
10271 }
10272 /* If we just have "complex", it is equivalent to "complex double". */
10275 {
10278 "ISO C++ does not support plain %<complex%> meaning "
10280 }
10281 }
10282 /* Gather flags. */
10286 #if 0
10287 /* See the code below that used this. */
10290 #endif
10295 else
10299 {
10301 ctor_return_type,
10302 type_quals,
10305 }
10307 {
10312 /* We handle `main' specially here, because 'main () { }' is so
10313 common. With no options, it is allowed. With -Wreturn-type,
10314 it is a warning. It is only an error with -pedantic-errors. */
10315 is_main = (funcdef_flag
10331 else
10336 /* FIXME we should be able to propagate the error_mark_node as is
10337 for other contexts too. */
10339 else
10341 }
10346 {
10348 {
10352 }
10357 }
10359 /* Now process the modifiers that were specified
10360 and check for invalid combinations. */
10362 /* Long double is a special combination. */
10364 {
10368 }
10370 /* Check all other uses of type modifiers. */
10373 {
10395 {
10400 }
10401 else
10402 {
10405 {
10408 name);
10411 }
10412 }
10414 /* Discard the type modifiers if they are invalid. */
10416 {
10422 }
10423 }
10425 /* Decide whether an integer type is signed or not.
10426 Optionally treat bitfields as signed by default. */
10428 /* [class.bit]
10430 It is implementation-defined whether a plain (neither
10431 explicitly signed or unsigned) char, short, int, or long
10432 bit-field is signed or unsigned.
10434 Naturally, we extend this to long long as well. Note that
10435 this does not include wchar_t. */
10437 && !signed_p
10438 /* A typedef for plain `int' without `signed' can be
10439 controlled just like plain `int', but a typedef for
10440 `signed int' cannot be so controlled. */
10441 && !(typedef_decl
10445 {
10458 else
10460 }
10473 {
10476 /* If a modifier is specified, the resulting complex is the complex
10477 form of TYPE. E.g, "complex short" is "complex short int". */
10486 else
10488 }
10490 /* If we're using the injected-class-name to form a compound type or a
10491 declaration, replace it with the underlying class so we don't get
10492 redundant typedefs in the debug output. But if we are returning the
10493 type unchanged, leave it alone so that it's available to
10494 maybe_get_template_decl_from_type_decl. */
10502 type = cp_build_qualified_type_real
10506 /* We might have ignored or rejected some of the qualifiers. */
10513 {
10517 }
10529 {
10531 {
10536 }
10540 }
10543 /* Issue errors about use of storage classes for parameters. */
10545 {
10547 {
10550 }
10552 {
10555 }
10561 /* Function parameters cannot be concept. */
10564 /* Function parameters cannot be constexpr. If we saw one, moan
10565 and pretend it wasn't there. */
10567 {
10570 }
10571 }
10573 /* Give error if `virtual' is used outside of class declaration. */
10576 {
10580 }
10583 {
10598 declspecs->gnu_thread_keyword_p
10604 {
10629 }
10632 {
10634 {
10638 "type must be cv-qualified %<auto%> or reference to "
10640 }
10643 }
10653 }
10655 /* Static anonymous unions are dealt with here. */
10661 /* Warn about storage classes that are invalid for certain
10662 kinds of declarations (parameters, typenames, etc.). */
10664 && ((storage_class
10668 {
10671 }
10676 {
10680 ;
10682 ;
10684 /* C++ allows static class elements. */
10686 /* C++ also allows inlines and signed and unsigned elements,
10687 but in those cases we don't come in here. */
10688 ;
10689 else
10690 {
10693 else
10694 {
10697 else
10699 }
10705 }
10706 }
10711 {
10714 }
10718 {
10723 /* When thread_local is applied to a variable of block scope the
10724 storage-class-specifier static is implied if it does not appear
10725 explicitly. */
10728 }
10731 {
10735 }
10739 else
10740 {
10743 {
10756 }
10757 }
10760 {
10761 /* Apply the c++11 attributes to the type preceding them. */
10765 }
10767 /* Determine the type of the entity declared by recurring on the
10768 declarator. */
10770 {
10772 tree attrs;
10779 {
10791 attr_flags);
10792 }
10796 /* We don't want to warn in parmeter context because we don't
10797 yet know if the parse will succeed, and this might turn out
10798 to be a constructor call. */
10801 /* If the type is class-like and the inner name used a
10802 global namespace qualifier, we need the parens.
10803 Unfortunately all we can tell is whether a qualified name
10804 was used or not. */
10805 && !(inner_declarator
10816 {
10824 /* [dcl.array]/1:
10826 The optional attribute-specifier-seq appertains to the
10827 array. */
10833 {
10834 tree arg_types;
10837 /* Declaring a function type. */
10843 /* Pick up type qualifiers which should be applied to `this'. */
10845 /* Pick up virt-specifiers. */
10847 /* And ref-qualifier, too */
10849 /* And tx-qualifier. */
10851 /* Pick up the exception specifications. */
10853 /* If the exception-specification is ill-formed, let's pretend
10854 there wasn't one. */
10862 /* Say it's a definition only for the CALL_EXPR
10863 closest to the identifier. */
10866 /* Handle a late-specified return type. */
10869 {
10871 {
10873 {
10878 {
10880 "%<auto%> type specifier without trailing "
10883 "only available with -std=c++14 or "
10885 }
10887 {
10891 }
10892 }
10894 {
10899 }
10901 {
10903 {
10906 "for %qT must have trailing return "
10908 else
10911 type);
10914 }
10920 else
10924 }
10925 }
10928 {
10930 /* Not using maybe_warn_cpp0x because this should
10931 always be an error. */
10934 else
10938 }
10939 }
10945 {
10948 }
10951 {
10955 /* We now know that the TYPE_QUALS don't apply to the
10956 decl, but to its return type. */
10958 }
10960 /* Error about some types functions can't return. */
10963 {
10967 }
10969 {
10973 }
10977 && funcdecl_p
10983 {
10984 /* We are within a class's scope. If our declarator name
10985 is the same as the class name, and we are defining
10986 a function, then it is a constructor/destructor, and
10987 therefore returns a void type. */
10989 /* ISO C++ 12.4/2. A destructor may not be declared
10990 const or volatile. A destructor may not be static.
10991 A destructor may not be declared with ref-qualifier.
10993 ISO C++ 12.1. A constructor may not be declared
10994 const or volatile. A constructor may not be
10995 virtual. A constructor may not be static.
10996 A constructor may not be declared with ref-qualifier. */
11002 {
11007 }
11010 {
11016 }
11020 current_class_type,
11021 flags))
11025 {
11026 /* It's a constructor. */
11030 {
11034 }
11038 }
11041 }
11043 {
11045 {
11046 /* Cannot be both friend and virtual. */
11049 }
11055 name);
11056 }
11058 {
11060 {
11063 }
11066 }
11068 {
11071 }
11080 {
11084 }
11090 {
11092 /* transaction_safe applies to the type, but
11093 transaction_safe_dynamic applies to the function. */
11096 else
11098 }
11100 /* [dcl.fct]/2:
11102 The optional attribute-specifier-seq appertains to
11103 the function type. */
11108 }
11114 /* Filter out pointers-to-references and references-to-references.
11115 We can get these if a TYPE_DECL is used. */
11118 {
11120 {
11123 }
11125 /* In C++0x, we allow reference to reference declarations
11126 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
11127 and template type arguments [14.3.1/4 temp.arg.type]. The
11128 check for direct reference to reference declarations, which
11129 are still forbidden, occurs below. Reasoning behind the change
11130 can be found in DR106, DR540, and the rvalue reference
11131 proposals. */
11133 {
11136 }
11137 }
11139 {
11144 }
11146 /* We now know that the TYPE_QUALS don't apply to the decl,
11147 but to the target of the pointer. */
11150 /* This code used to handle METHOD_TYPE, but I don't think it's
11151 possible to get it here anymore. */
11155 {
11159 memfn_quals,
11160 rqual);
11166 }
11174 type);
11176 /* When the pointed-to type involves components of variable size,
11177 care must be taken to ensure that the size evaluation code is
11178 emitted early enough to dominate all the possible later uses
11179 and late enough for the variables on which it depends to have
11180 been assigned.
11182 This is expected to happen automatically when the pointed-to
11183 type has a name/declaration of it's own, but special attention
11184 is required if the type is anonymous.
11186 We handle the NORMAL and FIELD contexts here by inserting a
11187 dummy statement that just evaluates the size at a safe point
11188 and ensures it is not deferred until e.g. within a deeper
11189 conditional context (c++/43555).
11191 We expect nothing to be needed here for PARM or TYPENAME.
11192 Evaluating the size at this point for TYPENAME would
11193 actually be incorrect, as we might be in the middle of an
11194 expression with side effects on the pointed-to type size
11195 "arguments" prior to the pointer declaration point and the
11196 size evaluation could end up prior to the side effects. */
11202 {
11206 }
11209 {
11210 /* In C++0x, the type we are creating a reference to might be
11211 a typedef which is itself a reference type. In that case,
11212 we follow the reference collapsing rules in
11213 [7.1.3/8 dcl.typedef] to create the final reference type:
11215 "If a typedef TD names a type that is a reference to a type
11216 T, an attempt to create the type 'lvalue reference to cv TD'
11217 creates the type 'lvalue reference to T,' while an attempt
11218 to create the type "rvalue reference to cv TD' creates the
11219 type TD."
11220 */
11224 {
11227 else
11229 }
11230 else
11231 type = cp_build_reference_type
11234 /* In C++0x, we need this check for direct reference to
11235 reference declarations, which are forbidden by
11236 [8.3.2/5 dcl.ref]. Reference to reference declarations
11237 are only allowed indirectly through typedefs and template
11238 type arguments. Example:
11240 void foo(int & &); // invalid ref-to-ref decl
11242 typedef int & int_ref;
11243 void foo(int_ref &); // valid ref-to-ref decl
11244 */
11248 }
11252 {
11256 /* We will already have complained. */
11258 else
11260 type);
11261 }
11262 else
11265 /* Process a list of type modifier keywords (such as
11266 const or volatile) that were given inside the `*' or `&'. */
11269 {
11270 type
11274 }
11276 /* Apply C++11 attributes to the pointer, and not to the
11277 type pointed to. This is unlike what is done for GNU
11278 attributes above. It is to comply with [dcl.ptr]/1:
11280 [the optional attribute-specifier-seq (7.6.1) appertains
11281 to the pointer and not to the object pointed to]. */
11294 }
11295 }
11297 /* A `constexpr' specifier used in an object declaration declares
11298 the object as `const'. */
11300 {
11301 /* DR1688 says that a `constexpr' specifier in combination with
11302 `volatile' is valid. */
11305 {
11308 }
11309 }
11315 {
11317 unqualified_id);
11319 }
11321 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
11322 qualified with a class-name, turn it into a METHOD_TYPE, unless
11323 we know that the function is static. We take advantage of this
11324 opportunity to do other processing that pertains to entities
11325 explicitly declared to be class members. Note that if DECLARATOR
11326 is non-NULL, we know it is a cdk_id declarator; otherwise, we
11327 would not have exited the loop above. */
11332 {
11338 {
11340 {
11344 }
11345 else
11349 }
11351 can skip the following checks. */
11354 qualifying type must certainly be complete. */
11355 funcdef_flag
11356 /* A friend declaration of "T::f" is OK, even if
11357 "T" is a template parameter. But, if this
11358 function is not a friend, the qualifying type
11359 must be a class. */
11361 /* For a declaration, the type need not be
11362 complete, if either it is dependent (since there
11363 is no meaningful definition of complete in that
11364 case) or the qualifying class is currently being
11365 defined. */
11368 /* Check that the qualifying type is complete. */
11372 {
11375 {
11383 }
11384 }
11386 {
11390 }
11391 }
11396 /* Now TYPE has the actual type. */
11399 {
11402 else
11404 }
11410 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
11411 a declarator-id appertains to the entity that is declared. */
11414 /* Handle parameter packs. */
11416 {
11418 /* Turn the type into a pack expansion.*/
11420 else
11422 }
11425 && !processing_template_decl
11427 {
11430 else
11433 }
11436 {
11437 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
11438 in the declaration of a constructor or conversion function within
11439 a class definition. */
11446 else
11448 "only declarations of constructors and conversion operators "
11451 }
11454 {
11456 {
11459 }
11461 {
11464 }
11467 {
11470 }
11472 {
11475 }
11477 {
11480 }
11482 {
11486 }
11487 }
11489 /* If this is declaring a typedef name, return a TYPE_DECL. */
11491 {
11492 tree decl;
11494 /* This declaration:
11496 typedef void f(int) const;
11498 declares a function type which is not a member of any
11499 particular class, but which is cv-qualified; for
11500 example "f S::*" declares a pointer to a const-qualified
11501 member function of S. We record the cv-qualification in the
11502 function type. */
11504 {
11507 /* We have now dealt with these qualifiers. */
11510 }
11513 {
11516 }
11523 else
11529 }
11532 {
11536 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
11538 /* The TYPE_DECL is "abstract" because there will be
11539 clones of this constructor/destructor, and there will
11540 be copies of this TYPE_DECL generated in those
11541 clones. The decloning optimization (for space) may
11542 revert this subsequently if it determines that
11543 the clones should share a common implementation. */
11545 }
11550 unqualified_id);
11552 /* If the user declares "typedef struct {...} foo" then the
11553 struct will have an anonymous name. Fill that name in now.
11554 Nothing can refer to it, so nothing needs know about the name
11555 change. */
11557 && unqualified_id
11575 /* Acknowledge that this was written:
11576 `using analias = atype;'. */
11580 }
11582 /* Detect the case of an array type of unspecified size
11583 which came, as such, direct from a typedef name.
11584 We must copy the type, so that the array's domain can be
11585 individually set by the object's initializer. */
11592 /* Detect where we're using a typedef of function type to declare a
11593 function. PARMS will not be set, so we must create it now. */
11596 {
11598 tree args;
11603 {
11609 }
11614 {
11615 /* The qualifiers on the function type become the qualifiers on
11616 the non-static member function. */
11620 }
11621 }
11623 /* If this is a type name (such as, in a cast or sizeof),
11624 compute the type and return it now. */
11627 {
11628 /* Note that here we don't care about type_quals. */
11630 /* Special case: "friend class foo" looks like a TYPENAME context. */
11632 {
11634 {
11637 }
11640 {
11641 /* Don't allow friend declaration without a class-key. */
11648 else
11651 type);
11652 }
11654 /* Only try to do this stuff if we didn't already give up. */
11656 {
11657 /* A friendly class? */
11661 else
11663 type);
11666 }
11667 }
11669 {
11676 /* Core issue #547: need to allow this in template type args.
11677 Allow it in general in C++11 for alias-declarations. */
11681 else
11683 }
11689 }
11693 && ! bitfield
11695 {
11698 }
11701 {
11702 /* Only functions may be declared using an operator-function-id. */
11704 {
11707 }
11712 type);
11713 }
11715 /* We don't check parameter types here because we can emit a better
11716 error message later. */
11718 {
11722 }
11724 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
11725 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
11728 {
11734 {
11737 else
11740 }
11742 /* A parameter declared as an array of T is really a pointer to T.
11743 One declared as a function is really a pointer to a function.
11744 One declared as a member is really a pointer to member. */
11747 {
11748 /* Transfer const-ness of array into that of type pointed to. */
11752 }
11755 }
11760 {
11766 }
11768 {
11772 {
11779 }
11781 {
11784 {
11790 else
11794 }
11796 /* The C99 flexible array extension. */
11799 {
11803 {
11806 }
11807 else
11808 {
11809 /* Array is a flexible member. */
11811 /* Do not warn on flexible array members in system
11816 else
11820 /* Flexible array member has a null domain. */
11822 }
11823 }
11826 {
11827 /* Happens when declaring arrays of sizes which
11828 are error_mark_node, for example. */
11830 }
11832 {
11833 /* Something like struct S { int N::j; }; */
11836 }
11839 {
11841 tree function_context;
11844 {
11845 /* This should never happen in pure C++ (the check
11846 could be an assert). It could happen in
11847 Objective-C++ if someone writes invalid code that
11848 uses a function declaration for an instance
11849 variable or property (instance variables and
11850 properties are parsed as FIELD_DECLs, but they are
11851 part of an Objective-C class, not a C++ class).
11852 That code is invalid and is caught by this
11853 check. */
11855 {
11857 unqualified_id);
11859 }
11861 /* ``A union may [ ... ] not [ have ] virtual functions.''
11862 ARM 9.5 */
11864 {
11866 unqualified_id);
11868 }
11873 {
11877 }
11878 }
11880 /* Check that the name used for a destructor makes sense. */
11882 {
11886 {
11891 }
11894 {
11898 }
11900 {
11903 }
11905 {
11908 }
11909 }
11911 {
11916 }
11919 {
11922 }
11924 {
11927 }
11930 {
11933 {
11939 }
11940 }
11942 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
11954 parms,
11955 unqualified_id,
11956 reqs,
11966 #if 0
11967 /* This clobbers the attrs stored in `decl' from `attrlist'. */
11968 /* The decl and setting of decl_attr is also turned off. */
11970 #endif
11972 /* [class.conv.ctor]
11974 A constructor declared without the function-specifier
11975 explicit that can be called with a single parameter
11976 specifies a conversion from the type of its first
11977 parameter to the type of its class. Such a constructor
11978 is called a converting constructor. */
11981 }
11986 {
11989 {
11991 {
11995 }
11996 else
12001 }
12002 }
12003 else
12004 {
12006 {
12010 }
12012 }
12015 {
12016 /* Friends are treated specially. */
12020 {
12022 {
12023 decl = check_explicit_specialization
12028 }
12032 funcdef_flag);
12034 }
12035 else
12037 }
12039 /* Structure field. It may not be a function, except for C++. */
12042 {
12044 {
12045 /* C++ allows static class members. All other work
12046 for this is done by grokfield. */
12054 unqualified_id);
12056 {
12060 }
12067 /* Even if there is an in-class initialization, DECL
12068 is considered undefined until an out-of-class
12069 definition is provided, unless this is an inline
12070 variable. */
12074 {
12080 }
12081 }
12082 else
12083 {
12086 unqualified_id);
12088 {
12090 unqualified_id);
12092 }
12097 {
12100 }
12103 {
12106 }
12109 {
12110 /* An attempt is being made to initialize a non-static
12111 member. This is new in C++11. */
12114 /* If this has been parsed with static storage class, but
12115 errors forced staticp to be cleared, ensure NSDMI is
12116 not present. */
12119 }
12120 }
12126 }
12127 }
12130 {
12131 tree original_name;
12139 else
12141 // FIXME:gcc_assert (original_name == dname);
12148 {
12151 name);
12152 else
12154 name);
12155 }
12159 /* Function declaration not at top level.
12160 Storage classes other than `extern' are not allowed
12161 and `extern' makes no difference. */
12166 {
12169 "%<static%> specifier invalid for function %qs "
12171 else
12173 "%<inline%> specifier invalid for function %qs "
12175 }
12178 {
12180 {
12183 }
12186 {
12191 }
12192 }
12194 /* Record whether the function is public. */
12204 publicp,
12207 sfk,
12208 funcdef_flag,
12217 {
12220 /* Don't allow a static member function in a class, and forbid
12221 declaring main to be static. */
12223 {
12227 }
12229 {
12230 /* 7.1.1: There can be no static function declarations within a
12231 block. */
12234 }
12237 {
12240 }
12241 }
12242 }
12243 else
12244 {
12245 /* It's a variable. */
12247 /* An uninitialized decl with `extern' is a reference. */
12249 declspecs,
12250 initialized,
12251 type_quals,
12252 inlinep,
12253 concept_p,
12254 template_count,
12264 {
12267 {
12272 }
12274 {
12277 }
12279 {
12281 "cannot explicitly declare member %q#D to have "
12284 }
12285 }
12287 {
12291 }
12296 {
12301 }
12302 }
12307 {
12311 }
12314 {
12316 {
12317 /* It's common practice (and completely valid) to have a const
12318 be initialized and declared extern. */
12321 }
12322 else
12323 {
12326 }
12327 }
12329 /* Record `register' declaration for warnings on &
12330 and in case doing stupid register allocation. */
12333 {
12335 /* Warn about register storage specifiers on PARM_DECLs. */
12337 {
12340 "ISO C++17 does not allow %<register%> storage "
12342 else
12345 }
12346 }
12352 /* Set constexpr flag on vars (functions got it in grokfndecl). */
12356 /* Record constancy and volatility on the DECL itself . There's
12357 no need to do this when processing a template; we'll do this
12358 for the instantiated declaration based on the type of DECL. */
12363 }
12364 }
12365 \f
12366 /* Subroutine of start_function. Ensure that each of the parameter
12367 types (as listed in PARMS) is complete, as is required for a
12368 function definition. */
12370 static void
12372 {
12374 {
12379 {
12385 }
12386 else
12387 /* grokparms or complete_type_or_else will have already issued
12388 an error. */
12390 }
12391 }
12393 /* Returns nonzero if T is a local variable. */
12395 int
12397 {
12399 /* A VAR_DECL with a context that is a _TYPE is a static data
12400 member. */
12402 /* Any other non-local variable must be at namespace scope. */
12408 }
12410 /* Like local_variable_p, but suitable for use as a tree-walking
12411 function. */
12413 static tree
12416 {
12424 }
12426 /* Check that ARG, which is a default-argument expression for a
12427 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
12428 something goes wrong. DECL may also be a _TYPE node, rather than a
12429 DECL, if there is no DECL available. */
12431 tree
12433 {
12434 tree var;
12435 tree decl_type;
12438 /* We get a DEFAULT_ARG when looking at an in-class declaration
12439 with a default argument. Ignore the argument for now; we'll
12440 deal with it after the class is complete. */
12444 {
12447 }
12448 else
12455 /* Something already went wrong. There's no need to check
12456 further. */
12459 /* [dcl.fct.default]
12461 A default argument expression is implicitly converted to the
12462 parameter type. */
12465 LOOKUP_IMPLICIT);
12468 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
12469 the call sites. */
12474 /* [dcl.fct.default]
12476 Local variables shall not be used in default argument
12477 expressions.
12479 The keyword `this' shall not be used in a default argument of a
12480 member function. */
12483 {
12485 {
12489 else
12491 }
12493 }
12495 /* All is well. */
12497 }
12499 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
12501 static tree
12503 {
12508 {
12511 else
12513 }
12515 /* Do warn about using typedefs to a deprecated class. */
12527 return type_is_deprecated
12531 }
12533 /* Decode the list of parameter types for a function type.
12534 Given the list of things declared inside the parens,
12535 return a list of types.
12537 If this parameter does not end with an ellipsis, we append
12538 void_list_node.
12540 *PARMS is set to the chain of PARM_DECLs created. */
12542 tree
12544 {
12547 tree parm;
12551 {
12564 {
12566 && !init
12569 /* DR 577: A parameter list consisting of a single
12570 unnamed parameter of non-dependent type 'void'. */
12574 "invalid use of cv-qualified type %qT in "
12576 else
12578 "invalid use of type %<void%> in parameter "
12580 /* It's not a good idea to actually create parameters of
12581 type `void'; other parts of the compiler assume that a
12582 void type terminates the parameter list. */
12585 }
12588 {
12590 {
12594 }
12596 /* Top-level qualifiers on the parameters are
12597 ignored for function types. */
12600 {
12604 }
12608 {
12609 /* Before C++17 DR 393:
12610 [dcl.fct]/6, parameter types cannot contain pointers
12611 (references) to arrays of unknown bound. */
12616 {
12624 }
12627 ptr
12633 }
12639 }
12644 }
12652 }
12654 \f
12655 /* D is a constructor or overloaded `operator='.
12657 Let T be the class in which D is declared. Then, this function
12658 returns:
12660 -1 if D's is an ill-formed constructor or copy assignment operator
12661 whose first parameter is of type `T'.
12662 0 if D is not a copy constructor or copy assignment
12663 operator.
12664 1 if D is a copy constructor or copy assignment operator whose
12665 first parameter is a reference to non-const qualified T.
12666 2 if D is a copy constructor or copy assignment operator whose
12667 first parameter is a reference to const qualified T.
12669 This function can be used as a predicate. Positive values indicate
12670 a copy constructor and nonzero values indicate a copy assignment
12671 operator. */
12673 int
12675 {
12676 tree args;
12677 tree arg_type;
12685 /* Instantiations of template member functions are never copy
12686 functions. Note that member functions of templated classes are
12687 represented as template functions internally, and we must
12688 accept those as copy functions. */
12700 {
12701 /* Pass by value copy assignment operator. */
12703 }
12707 {
12710 }
12711 else
12717 /* There are more non-optional args. */
12721 }
12723 /* D is a constructor or overloaded `operator='.
12725 Let T be the class in which D is declared. Then, this function
12726 returns true when D is a move constructor or move assignment
12727 operator, false otherwise. */
12729 bool
12731 {
12735 /* There are no move constructors if we are in C++98 mode. */
12741 /* Instantiations of template member functions are never move
12742 functions. Note that member functions of templated classes are
12743 represented as template functions internally, and we must
12744 accept those as move functions. */
12748 }
12750 /* D is a constructor or overloaded `operator='.
12752 Then, this function returns true when D has the same signature as a move
12753 constructor or move assignment operator (because either it is such a
12754 ctor/op= or it is a template specialization with the same signature),
12755 false otherwise. */
12757 bool
12759 {
12760 tree args;
12761 tree arg_type;
12781 /* There are more non-optional args. */
12785 }
12787 /* Remember any special properties of member function DECL. */
12789 void
12791 {
12792 tree class_type;
12799 {
12806 {
12807 /* [class.copy]
12809 A non-template constructor for class X is a copy
12810 constructor if its first parameter is of type X&, const
12811 X&, volatile X& or const volatile X&, and either there
12812 are no other parameters or else all other parameters have
12813 default arguments. */
12819 }
12830 }
12832 {
12833 /* [class.copy]
12835 A non-template assignment operator for class X is a copy
12836 assignment operator if its parameter is of type X, X&, const
12837 X&, volatile X& or const volatile X&. */
12842 {
12848 }
12851 }
12855 /* Destructors are handled in check_methods. */
12856 }
12858 /* Check a constructor DECL has the correct form. Complains
12859 if the class has a constructor of the form X(X). */
12861 bool
12863 {
12867 {
12868 /* [class.copy]
12870 A declaration of a constructor for a class X is ill-formed if
12871 its first parameter is of type (optionally cv-qualified) X
12872 and either there are no other parameters or else all other
12873 parameters have default arguments.
12875 We *don't* complain about member template instantiations that
12876 have this form, though; they can occur as we try to decide
12877 what constructor to use during overload resolution. Since
12878 overload resolution will never prefer such a constructor to
12879 the non-template copy constructor (which is either explicitly
12880 or implicitly defined), there's no need to worry about their
12881 existence. Theoretically, they should never even be
12882 instantiated, but that's hard to forestall. */
12886 }
12889 }
12891 /* DECL is a declaration for an overloaded or conversion operator. If
12892 COMPLAIN is true, errors are issued for invalid declarations. */
12894 bool
12896 {
12905 tree_code operator_code;
12908 {
12909 /* Conversion operators are TYPE_EXPR for the purposes of this
12910 function. */
12913 }
12914 else
12915 {
12922 }
12925 {
12926 /* operator new and operator delete are quite special. */
12929 {
12948 }
12950 /* [basic.std.dynamic.allocation]/1:
12952 A program is ill-formed if an allocation function is declared
12953 in a namespace scope other than global scope or declared
12954 static in global scope.
12956 The same also holds true for deallocation functions. */
12958 {
12960 {
12963 }
12966 {
12969 }
12970 }
12974 else
12975 {
12978 }
12981 }
12983 /* An operator function must either be a non-static member function
12984 or have at least one parameter of a class, a reference to a class,
12985 an enumeration, or a reference to an enumeration. 13.4.0.6 */
12987 {
12993 {
12996 }
12999 {
13003 }
13006 {
13008 {
13013 }
13019 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
13020 because these checks are performed even on template
13021 functions. */
13025 }
13026 }
13029 /* There are no further restrictions on the arguments to an overloaded
13030 "operator ()". */
13034 {
13035 /* 13.4.0.3 */
13038 }
13040 /* Count the number of arguments and check for ellipsis. */
13043 {
13045 {
13046 /* Variadic. */
13049 }
13051 }
13053 /* Verify correct number of arguments. */
13055 {
13058 {
13059 /* We have a unary instance of an ambi-ary op. Remap to the
13060 unary one. */
13066 }
13068 {
13069 /* This was an ambiguous operator but is invalid. */
13074 }
13077 && ! processing_template_decl
13078 /* x++ and x--'s second argument must be an int. */
13080 integer_type_node))
13081 {
13085 decl);
13087 }
13092 {
13097 }
13102 {
13107 }
13112 }
13114 /* There can be no default arguments. */
13117 {
13123 else
13124 {
13127 }
13128 }
13130 /* At this point the declaration is well-formed. It may not be
13131 sensible though. */
13133 /* Check member function warnings only on the in-class declaration.
13134 There's no point warning on an out-of-class definition. */
13138 /* Warn about conversion operators that will never be used. */
13142 {
13151 ref
13157 {
13160 ref
13165 /* Don't force t to be complete here. */
13170 ref
13175 }
13176 }
13181 /* Effective C++ rules below. */
13183 /* More Effective C++ rule 7. */
13190 /* More Effective C++ rule 6. */
13195 {
13204 {
13209 }
13210 else
13211 {
13214 }
13215 }
13217 /* Effective C++ rule 23. */
13228 }
13229 \f
13230 /* Return a string giving the keyword associate with CODE. */
13234 {
13236 {
13249 }
13250 }
13252 /* Name lookup in an elaborated-type-specifier (after the keyword
13253 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
13254 elaborated-type-specifier is invalid, issue a diagnostic and return
13255 error_mark_node; otherwise, return the *_TYPE to which it referred.
13256 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
13258 tree
13260 tree decl,
13262 {
13263 tree type;
13265 /* In the case of:
13267 struct S { struct S *p; };
13269 name lookup will find the TYPE_DECL for the implicit "S::S"
13270 typedef. Adjust for that here. */
13276 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
13277 is false for this case as well. */
13279 {
13283 }
13284 /* Accept template template parameters. */
13288 ;
13289 /* [dcl.type.elab]
13291 If the identifier resolves to a typedef-name or the
13292 simple-template-id resolves to an alias template
13293 specialization, the elaborated-type-specifier is ill-formed.
13295 In other words, the only legitimate declaration to use in the
13296 elaborated type specifier is the implicit typedef created when
13297 the type is declared. */
13301 {
13305 else
13310 }
13315 {
13319 }
13322 {
13326 }
13330 {
13331 /* If a class template appears as elaborated type specifier
13332 without a template header such as:
13334 template <class T> class C {};
13335 void f(class C); // No template header here
13337 then the required template argument is missing. */
13342 }
13345 }
13347 /* Lookup NAME in elaborate type specifier in scope according to
13348 SCOPE and issue diagnostics if necessary.
13349 Return *_TYPE node upon success, NULL_TREE when the NAME is not
13350 found, and ERROR_MARK_NODE for type error. */
13352 static tree
13355 {
13356 tree t;
13357 tree decl;
13359 {
13360 /* First try ordinary name lookup, ignoring hidden class name
13361 injected via friend declaration. */
13364 /* If that fails, the name will be placed in the smallest
13365 non-class, non-function-prototype scope according to 3.3.1/5.
13366 We may already have a hidden name declared as friend in this
13367 scope. So lookup again but not ignoring hidden names.
13368 If we find one, that name will be made visible rather than
13369 creating a new tag. */
13372 }
13373 else
13378 /* If scope is ts_current we're defining a class, so ignore a
13379 template template parameter. */
13385 {
13386 /* Look for invalid nested type:
13387 class C {
13388 class C {};
13389 }; */
13391 {
13394 decl);
13396 }
13398 /* Two cases we need to consider when deciding if a class
13399 template is allowed as an elaborated type specifier:
13400 1. It is a self reference to its own class.
13401 2. It comes with a template header.
13403 For example:
13405 template <class T> class C {
13406 class C *c1; // DECL_SELF_REFERENCE_P is true
13407 class D;
13408 };
13409 template <class U> class C; // template_header_p is true
13410 template <class T> class C<T>::D {
13411 class C *c2; // DECL_SELF_REFERENCE_P is true
13412 }; */
13415 decl,
13416 template_header_p
13421 {
13430 }
13433 }
13435 {
13439 }
13440 else
13442 }
13444 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
13445 Define the tag as a forward-reference if it is not defined.
13447 If a declaration is given, process it here, and report an error if
13448 multiple declarations are not identical.
13450 SCOPE is TS_CURRENT when this is also a definition. Only look in
13451 the current frame for the name (since C++ allows new names in any
13452 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
13453 declaration. Only look beginning from the current scope outward up
13454 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
13456 TEMPLATE_HEADER_P is true when this declaration is preceded by
13457 a set of template parameters. */
13459 static tree
13462 {
13469 {
13482 }
13484 /* In case of anonymous name, xref_tag is only called to
13485 make type node and push name. Name lookup is not required. */
13496 {
13500 /* Since SCOPE is not TS_CURRENT, we are not looking at a
13501 definition of this tag. Since, in addition, we are currently
13502 processing a (member) template declaration of a template
13503 class, we must be very careful; consider:
13505 template <class X>
13506 struct S1
13508 template <class U>
13509 struct S2
13510 { template <class V>
13511 friend struct S1; };
13513 Here, the S2::S1 declaration should not be confused with the
13514 outer declaration. In particular, the inner version should
13515 have a template parameter of level 2, not level 1. This
13516 would be particularly important if the member declaration
13517 were instead:
13519 template <class V = U> friend struct S1;
13521 say, when we should tsubst into `U' when instantiating
13522 S2. On the other hand, when presented with:
13524 template <class T>
13525 struct S1 {
13526 template <class U>
13527 struct S2 {};
13528 template <class U>
13529 friend struct S2;
13530 };
13532 we must find the inner binding eventually. We
13533 accomplish this by making sure that the new type we
13534 create to represent this declaration has the right
13535 TYPE_CONTEXT. */
13538 }
13541 {
13542 /* If no such tag is yet defined, create a forward-reference node
13543 and record it as the "definition".
13544 When a real declaration of this type is found,
13545 the forward-reference will be altered into a real type. */
13547 {
13550 }
13551 else
13552 {
13556 {
13557 /* Mark it as a lambda type. */
13559 /* And push it into current scope. */
13561 }
13563 }
13564 }
13565 else
13566 {
13568 {
13569 /* Check that we aren't trying to overload a class with different
13570 constraints. */
13573 {
13576 }
13579 }
13583 {
13587 }
13589 /* Make injected friend class visible. */
13591 {
13598 {
13602 }
13603 }
13604 }
13607 }
13609 /* Wrapper for xref_tag_1. */
13611 tree
13614 {
13615 tree ret;
13621 }
13624 tree
13626 {
13631 else
13638 }
13640 /* Create the binfo hierarchy for REF with (possibly NULL) base list
13641 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
13642 access_* node, and the TREE_VALUE is the type of the base-class.
13643 Non-NULL TREE_TYPE indicates virtual inheritance. */
13645 void
13647 {
13654 tree default_access;
13660 /* The base of a derived class is private by default, all others are
13661 public. */
13666 /* First, make sure that any templates in base-classes are
13667 instantiated. This ensures that if we call ourselves recursively
13668 we do not get confused about which classes are marked and which
13669 are not. */
13672 {
13675 /* The dependent_type_p call below should really be dependent_scope_p
13676 so that we give a hard error about using an incomplete type as a
13677 base, but we allow it with a pedwarn for backward
13678 compatibility. */
13684 /* An incomplete type. Remove it from the list. */
13686 else
13687 {
13688 max_bases++;
13690 max_dvbases++;
13694 }
13695 }
13700 /* The binfo slot should be empty, unless this is an (ill-formed)
13701 redefinition. */
13712 /* Apply base-class info set up to the variants of this type. */
13716 {
13718 /* A C++98 POD cannot have base classes. */
13723 }
13730 {
13731 /* An aggregate can't have virtual base classes. */
13739 }
13742 {
13750 /* Before C++17, an aggregate cannot have base classes. In C++17, an
13751 aggregate can't have virtual, private, or protected base classes. */
13762 {
13764 basetype);
13766 }
13770 {
13772 /* The original basetype could have been a typedef'd type. */
13775 /* Inherit flags from the base. */
13786 }
13788 /* We must do this test after we've seen through a typedef
13789 type. */
13791 {
13794 else
13797 }
13800 /* Regenerate the pack expansion for the bases. */
13814 dropped_base:
13815 /* Update max_vbases to reflect the reality that we are dropping
13816 this base: if it reaches zero we want to undo the vec_alloc
13817 above to avoid inconsistencies during error-recovery: eg, in
13818 build_special_member_call, CLASSTYPE_VBASECLASSES non null
13819 and vtt null (c++/27952). */
13821 max_vbases--;
13823 max_vbases
13825 }
13832 /* If we didn't get max_vbases vbases, we must have shared at
13833 least one of them, and are therefore diamond shaped. */
13836 /* Unmark all the types. */
13841 /* Now see if we have a repeated base type. */
13843 {
13846 {
13848 {
13851 }
13853 }
13858 else
13860 }
13861 }
13863 \f
13864 /* Copies the enum-related properties from type SRC to type DST.
13865 Used with the underlying type of an enum and the enum itself. */
13866 static void
13868 {
13869 tree t;
13871 {
13881 else
13885 }
13886 }
13888 /* Begin compiling the definition of an enumeration type.
13889 NAME is its name,
13891 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
13893 UNDERLYING_TYPE is the type that will be used as the storage for
13894 the enumeration type. This should be NULL_TREE if no storage type
13895 was specified.
13897 ATTRIBUTES are any attributes specified after the enum-key.
13899 SCOPED_ENUM_P is true if this is a scoped enumeration type.
13901 if IS_NEW is not NULL, gets TRUE iff a new type is created.
13903 Returns the type object, as yet incomplete.
13904 Also records info about it so that build_enumerator
13905 may be used to declare the individual values as they are read. */
13907 tree
13910 {
13916 /* [C++0x dcl.enum]p5:
13918 If not explicitly specified, the underlying type of a scoped
13919 enumeration type is int. */
13926 /* If this is the real definition for a previous forward reference,
13927 fill in the contents in the same object that used to be the
13928 forward reference. */
13934 /* In case of a template_decl, the only check that should be deferred
13935 to instantiation time is the comparison of underlying types. */
13937 {
13939 {
13945 }
13947 {
13953 }
13959 {
13965 }
13966 }
13970 {
13971 /* In case of error, make a dummy enum to allow parsing to
13972 continue. */
13974 {
13977 }
13979 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
13980 of an opaque enum, or an opaque enum of an already defined
13981 enumeration (C++0x only).
13982 In any other case, it'll be NULL_TREE. */
13984 {
13987 }
13990 /* Do not push the decl more than once, unless we need to
13991 compare underlying types at instantiation time */
13994 || (underlying_type
13998 {
14002 /* std::byte aliases anything. */
14007 }
14008 else
14015 /* The enum is considered opaque until the opening '{' of the
14016 enumerator list. */
14019 }
14026 {
14028 /* We already checked that it matches, don't change it to a different
14031 {
14034 }
14037 else
14040 }
14042 /* If into a template class, the returned enum is always the first
14043 declaration (opaque or not) seen. This way all the references to
14044 this type will be to the same declaration. The following ones are used
14045 only to check for definition errors. */
14048 else
14050 }
14052 /* After processing and defining all the values of an enumeration type,
14053 install their decls in the enumeration type.
14054 ENUMTYPE is the type object. */
14056 void
14058 {
14059 tree values;
14060 tree underlying_type;
14061 tree decl;
14062 tree value;
14064 tree t;
14066 bool fixed_underlying_type_p
14069 /* We built up the VALUES in reverse order. */
14072 /* For an enum defined in a template, just set the type of the values;
14073 all further processing is postponed until the template is
14074 instantiated. We need to set the type so that tsubst of a CONST_DECL
14075 works. */
14077 {
14079 values;
14083 }
14085 /* Determine the minimum and maximum values of the enumerators. */
14087 {
14091 values;
14093 {
14096 /* [dcl.enum]: Following the closing brace of an enum-specifier,
14097 each enumerator has the type of its enumeration. Prior to the
14098 closing brace, the type of each enumerator is the type of its
14099 initializing value. */
14102 /* Update the minimum and maximum values, if appropriate. */
14106 /* Figure out what the minimum and maximum values of the
14107 enumerators are. */
14114 }
14115 }
14116 else
14117 /* [dcl.enum]
14119 If the enumerator-list is empty, the underlying type is as if
14120 the enumeration had a single enumerator with value 0. */
14124 {
14125 /* Compute the number of bits require to represent all values of the
14126 enumeration. We must do this before the type of MINNODE and
14127 MAXNODE are transformed, since tree_int_cst_min_precision relies
14128 on the TREE_TYPE of the value it is passed. */
14136 /* Determine the underlying type of the enumeration.
14138 [dcl.enum]
14140 The underlying type of an enumeration is an integral type that
14141 can represent all the enumerator values defined in the
14142 enumeration. It is implementation-defined which integral type is
14143 used as the underlying type for an enumeration except that the
14144 underlying type shall not be larger than int unless the value of
14145 an enumerator cannot fit in an int or unsigned int.
14147 We use "int" or an "unsigned int" as the underlying type, even if
14148 a smaller integral type would work, unless the user has
14149 explicitly requested that we use the smallest possible type. The
14150 user can request that for all enumerations with a command line
14151 flag, or for just one enumeration with an attribute. */
14153 use_short_enum = flag_short_enums
14156 /* If the precision of the type was specified with an attribute and it
14157 was too small, give an error. Otherwise, use it. */
14159 {
14162 else
14163 {
14166 }
14167 }
14171 itk++)
14172 {
14178 }
14180 {
14181 /* DR 377
14183 IF no integral type can represent all the enumerator values, the
14184 enumeration is ill-formed. */
14189 }
14191 /* [dcl.enum]
14193 The value of sizeof() applied to an enumeration type, an object
14194 of an enumeration type, or an enumerator, is the value of sizeof()
14195 applied to the underlying type. */
14198 /* Compute the minimum and maximum values for the type.
14200 [dcl.enum]
14202 For an enumeration where emin is the smallest enumerator and emax
14203 is the largest, the values of the enumeration are the values of the
14204 underlying type in the range bmin to bmax, where bmin and bmax are,
14205 respectively, the smallest and largest values of the smallest bit-
14206 field that can store emin and emax. */
14208 /* The middle-end currently assumes that types with TYPE_PRECISION
14209 narrower than their underlying type are suitably zero or sign
14210 extended to fill their mode. Similarly, it assumes that the front
14211 end assures that a value of a particular type must be within
14212 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
14214 We used to set these fields based on bmin and bmax, but that led
14215 to invalid assumptions like optimizing away bounds checking. So
14216 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
14217 TYPE_MAX_VALUE to the values for the mode above and only restrict
14218 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
14222 set_min_and_max_values_for_integral_type
14225 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
14228 }
14229 else
14232 /* Convert each of the enumerators to the type of the underlying
14233 type of the enumeration. */
14235 {
14236 location_t saved_location;
14242 /* If the enumeration type has a fixed underlying type, we
14243 already checked all of the enumerator values. */
14245 else
14248 tf_warning_or_error);
14251 /* Do not clobber shared ints. */
14253 {
14257 }
14259 }
14261 /* Fix up all variant types of this enum type. */
14268 {
14270 /* TYPE_FIELDS needs fixup. */
14272 }
14274 /* Finish debugging output for this type. */
14277 /* Each enumerator now has the type of its enumeration. Clear the cache
14278 so that this change in types doesn't confuse us later on. */
14280 }
14282 /* Finishes the enum type. This is called only the first time an
14283 enumeration is seen, be it opaque or odinary.
14284 ENUMTYPE is the type object. */
14286 void
14288 {
14290 {
14294 }
14296 /* If this is a forward declaration, there should not be any variants,
14297 though we can get a variant in the middle of an enum-specifier with
14298 wacky code like 'enum E { e = sizeof(const E*) };' */
14302 }
14304 /* Build and install a CONST_DECL for an enumeration constant of the
14305 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
14306 Apply ATTRIBUTES if available. LOC is the location of NAME.
14307 Assignment of sequential values by default is handled here. */
14309 void
14311 location_t loc)
14312 {
14313 tree decl;
14314 tree context;
14315 tree type;
14317 /* scalar_constant_value will pull out this expression, so make sure
14318 it's folded as appropriate. */
14322 /* If the VALUE was erroneous, pretend it wasn't there; that will
14323 result in the enum being assigned the next value in sequence. */
14327 /* Remove no-op casts from the value. */
14332 {
14333 /* Validate and default VALUE. */
14335 {
14337 {
14342 }
14345 value = perform_implicit_conversion_flags
14353 {
14356 {
14360 }
14361 else
14362 {
14366 {
14370 }
14371 }
14372 }
14373 }
14375 /* Default based on previous value. */
14377 {
14379 {
14380 tree prev_value;
14383 /* C++03 7.2/4: If no initializer is specified for the first
14384 enumerator, the type is an unspecified integral
14385 type. Otherwise the type is the same as the type of the
14386 initializing value of the preceding enumerator unless the
14387 incremented value is not representable in that type, in
14388 which case the type is an unspecified integral type
14389 sufficient to contain the incremented value. */
14393 else
14394 {
14400 {
14403 {
14406 {
14412 }
14419 }
14422 else
14424 }
14427 {
14430 }
14431 }
14432 }
14433 else
14435 }
14437 /* Remove no-op casts from the value. */
14440 /* If the underlying type of the enum is fixed, check whether
14441 the enumerator values fits in the underlying type. If it
14442 does not fit, the program is ill-formed [C++0x dcl.enum]. */
14444 && value
14446 {
14451 /* Convert the value to the appropriate type. */
14453 }
14454 }
14456 /* C++ associates enums with global, function, or class declarations. */
14459 /* Build the actual enumeration constant. Note that the enumeration
14460 constants have the underlying type of the enum (if it is fixed)
14461 or the type of their initializer (if the underlying type of the
14462 enum is not fixed):
14464 [ C++0x dcl.enum ]
14466 If the underlying type is fixed, the type of each enumerator
14467 prior to the closing brace is the underlying type; if the
14468 initializing value of an enumerator cannot be represented by
14469 the underlying type, the program is ill-formed. If the
14470 underlying type is not fixed, the type of each enumerator is
14471 the type of its initializing value.
14473 If the underlying type is not fixed, it will be computed by
14474 finish_enum and we will reset the type of this enumerator. Of
14475 course, if we're processing a template, there may be no value. */
14489 {
14490 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
14491 on the TYPE_FIELDS list for `S'. (That's so that you can say
14492 things like `S::i' later.) */
14494 /* The enumerator may be getting declared outside of its enclosing
14495 class, like so:
14497 class S { public: enum E : int; }; enum S::E : int { i = 7; };
14499 For which case we need to make sure that the access of `S::i'
14500 matches the access of `S::E'. */
14506 else
14512 }
14513 else
14516 /* Add this enumeration constant to the list for this type. */
14518 }
14520 /* Look for an enumerator with the given NAME within the enumeration
14521 type ENUMTYPE. This routine is used primarily for qualified name
14522 lookup into an enumerator in C++0x, e.g.,
14524 enum class Color { Red, Green, Blue };
14526 Color color = Color::Red;
14528 Returns the value corresponding to the enumerator, or
14529 NULL_TREE if no such enumerator was found. */
14530 tree
14532 {
14533 tree e;
14538 }
14540 \f
14541 /* We're defining DECL. Make sure that its type is OK. */
14543 static void
14545 {
14549 /* In a function definition, arg types must be complete. */
14556 {
14561 /* Make it return void instead. */
14564 void_type_node,
14566 else
14568 fntype
14571 fntype = (cp_build_type_attribute_variant
14574 }
14575 else
14576 {
14580 }
14581 }
14583 /* True iff FN is an implicitly-defined default constructor. */
14585 static bool
14587 {
14591 }
14593 /* Clobber the contents of *this to let the back end know that the object
14594 storage is dead when we enter the constructor or leave the destructor. */
14596 static tree
14598 {
14599 /* Clobbering an empty base is pointless, and harmful if its one byte
14600 TYPE_SIZE overlays real data. */
14604 /* If we have virtual bases, clobber the whole object, but only if we're in
14605 charge. If we don't have virtual bases, clobber the as-base type so we
14606 don't mess with tail padding. */
14618 {
14621 }
14628 }
14630 /* Create the FUNCTION_DECL for a function definition.
14631 DECLSPECS and DECLARATOR are the parts of the declaration;
14632 they describe the function's name and the type it returns,
14633 but twisted together in a fashion that parallels the syntax of C.
14635 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
14636 DECLARATOR is really the DECL for the function we are about to
14637 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
14638 indicating that the function is an inline defined in-class.
14640 This function creates a binding context for the function body
14641 as well as setting up the FUNCTION_DECL in current_function_decl.
14643 For C++, we must first check whether that datum makes any sense.
14644 For example, "class A local_a(1,2);" means that variable local_a
14645 is an aggregate of type A, which should have a constructor
14646 applied to it with the argument list [1, 2].
14648 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
14649 or may be a BLOCK if the function has been defined previously
14650 in this translation unit. On exit, DECL_INITIAL (decl1) will be
14651 error_mark_node if the function has never been defined, or
14652 a BLOCK if the function has been defined somewhere. */
14654 bool
14656 {
14658 tree fntype;
14659 tree restype;
14662 tree current_function_parms;
14667 /* Sanity check. */
14675 /* ISO C++ 11.4/5. A friend function defined in a class is in
14676 the (lexical) scope of the class in which it is defined. */
14678 {
14681 /* CTYPE could be null here if we're dealing with a template;
14682 for example, `inline friend float foo()' inside a template
14683 will have no CTYPE set. */
14686 else
14688 }
14695 /* Handle gnu_inline attribute. */
14697 {
14702 }
14705 /* This is a constructor, we must ensure that any default args
14706 introduced by this definition are propagated to the clones
14707 now. The clones are used directly in overload resolution. */
14710 /* Sometimes we don't notice that a function is a static member, and
14711 build a METHOD_TYPE for it. Fix that up now. */
14715 /* Set up current_class_type, and enter the scope of the class, if
14716 appropriate. */
14722 /* Now that we have entered the scope of the class, we must restore
14723 the bindings for any template parameters surrounding DECL1, if it
14724 is an inline member template. (Order is important; consider the
14725 case where a template parameter has the same name as a field of
14726 the class.) It is not until after this point that
14727 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
14731 /* Effective C++ rule 15. */
14739 /* Make the init_value nonzero so pushdecl knows this is not tentative.
14740 error_mark_node is replaced below (in poplevel) with the BLOCK. */
14744 /* This function exists in static storage.
14745 (This does not mean `static' in the C sense!) */
14748 /* We must call push_template_decl after current_class_type is set
14749 up. (If we are processing inline definitions after exiting a
14750 class scope, current_class_type will be NULL_TREE until set above
14751 by push_nested_class.) */
14753 {
14756 {
14760 }
14762 }
14764 /* Make sure the parameter and return types are reasonable. When
14765 you declare a function, these types can be incomplete, but they
14766 must be complete when you define the function. */
14769 /* Build the return declaration for the function. */
14773 {
14774 tree resdecl;
14782 }
14784 /* Record the decl so that the function name is defined.
14785 If we already have a decl for this name, and it is a FUNCTION_DECL,
14786 use the old decl. */
14788 {
14789 /* A specialization is not used to guide overload resolution. */
14793 {
14797 /* If something went wrong when registering the declaration,
14798 use DECL1; we have to have a FUNCTION_DECL to use when
14799 parsing the body of the function. */
14800 ;
14801 else
14802 {
14803 /* Otherwise, OLDDECL is either a previous declaration
14804 of the same function or DECL1 itself. */
14811 {
14812 tree context;
14814 /* Check whether DECL1 is in an anonymous
14815 namespace. */
14817 context;
14819 {
14823 }
14827 OPT_Wmissing_declarations,
14829 }
14832 }
14833 }
14834 else
14835 {
14836 /* We need to set the DECL_CONTEXT. */
14839 }
14843 /* If #pragma weak applies, mark the decl appropriately now.
14844 The pragma only applies to global functions. Because
14845 determining whether or not the #pragma applies involves
14846 computing the mangled name for the declaration, we cannot
14847 apply the pragma until after we have merged this declaration
14848 with any previous declarations; if the original declaration
14849 has a linkage specification, that specification applies to
14850 the definition as well, and may affect the mangled name. */
14853 }
14855 /* We are now in the scope of the function being defined. */
14858 /* Save the parm names or decls from this function's declarator
14859 where store_parm_decls will find them. */
14862 /* Let the user know we're compiling this function. */
14867 /* This function may already have been parsed, in which case just
14868 return; our caller will skip over the body without parsing. */
14872 /* Initialize RTL machinery. We cannot do this until
14873 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
14874 even when processing a template; this is how we get
14875 CFUN set up, and our per-function variables initialized.
14876 FIXME factor out the non-RTL stuff. */
14880 /* Initialize the language data structures. Whenever we start
14881 a new function, we destroy temporaries in the usual way. */
14887 {
14890 }
14892 /* Start the statement-tree, start the tree now. */
14895 /* If we are (erroneously) defining a function that we have already
14896 defined before, wipe out what we knew before. */
14901 {
14902 /* We know that this was set up by `grokclassfn'. We do not
14903 wait until `store_parm_decls', since evil parse errors may
14904 never get us to that point. Here we keep the consistency
14905 between `current_class_type' and `current_class_ptr'. */
14911 cp_function_chain->x_current_class_ref
14913 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
14916 /* Constructors and destructors need to know whether they're "in
14917 charge" of initializing virtual base classes. */
14920 {
14923 }
14925 {
14928 }
14929 }
14932 /* Implicitly-defined methods (like the
14933 destructor for a class in which no destructor
14934 is explicitly declared) must not be defined
14935 until their definition is needed. So, we
14936 ignore interface specifications for
14937 compiler-generated functions. */
14943 {
14950 /* This is a function in a local class in an extern inline
14951 or template function. */
14953 }
14954 /* If this function belongs to an interface, it is public.
14955 If it belongs to someone else's interface, it is also external.
14956 This only affects inlines and template instantiations. */
14958 {
14961 {
14965 && ! flag_implement_inlines
14968 /* For WIN32 we also want to put these in linkonce sections. */
14970 }
14971 else
14974 /* If this function is in an interface implemented in this file,
14975 make sure that the back end knows to emit this function
14976 here. */
14979 }
14982 {
14983 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
14984 interface, we will have both finfo->interface_unknown and
14985 finfo->interface_only set. In that case, we don't want to
14986 use the normal heuristics because someone will supply a
14987 #pragma implementation elsewhere, and deducing it here would
14988 produce a conflict. */
14993 }
14994 else
14995 {
14996 /* This is a definition, not a reference.
14997 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
15005 else
15007 }
15009 /* Determine the ELF visibility attribute for the function. We must not
15010 do this before calling "pushdecl", as we must allow "duplicate_decls"
15011 to merge any attributes appropriately. We also need to wait until
15012 linkage is set. */
15026 {
15029 }
15039 /* Clobbering an empty base is harmful if it overlays real data. */
15041 /* We can't clobber safely for an implicitly-defined default constructor
15042 because part of the initialization might happen before we enter the
15043 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
15057 }
15060 /* Like start_preparsed_function, except that instead of a
15061 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
15063 Returns true on success. If the DECLARATOR is not suitable
15064 for a function, we return false, which tells the parser to
15065 skip the entire function. */
15067 bool
15070 tree attrs)
15071 {
15072 tree decl1;
15078 /* If the declarator is not suitable for a function definition,
15079 cause a syntax error. */
15081 {
15084 }
15087 /* main must return int. grokfndecl should have corrected it
15088 (and issued a diagnostic) if the user got it wrong. */
15090 integer_type_node));
15093 }
15094 \f
15095 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
15096 FN. */
15098 static bool
15100 {
15102 && !processing_template_decl
15104 /* We insert the EH_SPEC_BLOCK only in the original
15105 function; then, it is copied automatically to the
15106 clones. */
15108 /* Implicitly-generated constructors and destructors have
15109 exception specifications. However, those specifications
15110 are the union of the possible exceptions specified by the
15111 constructors/destructors for bases and members, so no
15112 unallowed exception will ever reach this function. By
15113 not creating the EH_SPEC_BLOCK we save a little memory,
15114 and we avoid spurious warnings about unreachable
15115 code. */
15117 }
15119 /* Store the parameter declarations into the current function declaration.
15120 This is called after parsing the parameter declarations, before
15121 digesting the body of the function.
15123 Also install to binding contour return value identifier, if any. */
15125 static void
15127 {
15129 tree parm;
15131 /* This is a chain of any other decls that came in among the parm
15132 declarations. If a parm is declared with enum {foo, bar} x;
15133 then CONST_DECLs for foo and bar are put here. */
15137 {
15138 /* This case is when the function was defined with an ANSI prototype.
15139 The parms already have decls, so we need not do anything here
15140 except record them as in effect
15141 and complain if any redundant old-style parm decls were written. */
15144 tree next;
15146 /* Must clear this because it might contain TYPE_DECLs declared
15147 at class level. */
15150 /* If we're doing semantic analysis, then we'll call pushdecl
15151 for each of these. We must do them in reverse order so that
15152 they end in the correct forward order. */
15156 {
15160 else
15161 {
15162 /* If we find an enum constant or a type tag,
15163 put it aside for the moment. */
15166 }
15167 }
15169 /* Get the decls in their original chain order and record in the
15170 function. This is all and only the PARM_DECLs that were
15171 pushed into scope by the loop above. */
15173 }
15174 else
15177 /* Now store the final chain of decls for the arguments
15178 as the decl-chain of the current lexical scope.
15179 Put the enumerators in as well, at the front so that
15180 DECL_ARGUMENTS is not modified. */
15185 }
15187 \f
15188 /* We have finished doing semantic analysis on DECL, but have not yet
15189 generated RTL for its body. Save away our current state, so that
15190 when we want to generate RTL later we know what to do. */
15192 static void
15194 {
15197 /* Save the language-specific per-function data so that we can
15198 get it back when we really expand this function. */
15201 /* Make a copy. */
15206 /* Clear out the bits we don't need. */
15211 }
15214 /* Set the return value of the constructor (if present). */
15216 static void
15218 {
15219 tree val;
15220 tree exprstmt;
15223 {
15224 /* Any return from a constructor will end up here. */
15230 /* Return the address of the object. */
15233 }
15234 }
15236 /* Do all the processing for the beginning of a destructor; set up the
15237 vtable pointers and cleanups for bases and members. */
15239 static void
15241 {
15242 tree compound_stmt;
15244 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
15245 issued an error message. We still want to try to process the
15246 body of the function, but initialize_vtbl_ptrs will crash if
15247 TYPE_BINFO is NULL. */
15249 {
15251 /* Make all virtual function table pointers in non-virtual base
15252 classes point to CURRENT_CLASS_TYPE's virtual function
15253 tables. */
15258 /* Clobbering an empty base is harmful if it overlays real data. */
15260 {
15264 {
15266 tree ref
15273 tf_warning_or_error);
15275 }
15276 else
15278 }
15280 /* And insert cleanups for our bases and members so that they
15281 will be properly destroyed if we throw. */
15283 }
15284 }
15286 /* At the end of every destructor we generate code to delete the object if
15287 necessary. Do that now. */
15289 static void
15291 {
15292 tree exprstmt;
15294 /* Any return from a destructor will end up here; that way all base
15295 and member cleanups will be run when the function returns. */
15299 {
15300 tree val;
15305 /* Return the address of the object. */
15308 }
15309 }
15311 /* Do the necessary processing for the beginning of a function body, which
15312 in this case includes member-initializers, but not the catch clauses of
15313 a function-try-block. Currently, this means opening a binding level
15314 for the member-initializers (in a ctor), member cleanups (in a dtor),
15315 and capture proxies (in a lambda operator()). */
15317 tree
15319 {
15320 tree stmt;
15327 else
15328 /* Always keep the BLOCK node associated with the outermost pair of
15329 curly braces of a function. These are needed for correct
15330 operation of dwarfout.c. */
15341 }
15343 /* Do the processing for the end of a function body. Currently, this means
15344 closing out the cleanups for fully-constructed bases and members, and in
15345 the case of the destructor, deleting the object if desired. Again, this
15346 is only meaningful for [cd]tors, since they are the only functions where
15347 there is a significant distinction between the main body and any
15348 function catch clauses. Handling, say, main() return semantics here
15349 would be wrong, as flowing off the end of a function catch clause for
15350 main() would also need to return 0. */
15352 void
15354 {
15358 /* Close the block. */
15367 }
15369 /* Given a function, returns the BLOCK corresponding to the outermost level
15370 of curly braces, skipping the artificial block created for constructor
15371 initializers. */
15373 tree
15375 {
15385 }
15387 /* If FNDECL is a class's key method, add the class to the list of
15388 keyed classes that should be emitted. */
15390 static void
15392 {
15396 {
15400 }
15401 }
15403 /* Subroutine of finish_function.
15404 Save the body of constexpr functions for possible
15405 future compile time evaluation. */
15407 static void
15409 {
15415 }
15417 /* Finish up a function declaration and compile that function
15418 all the way to assembler language output. The free the storage
15419 for the function definition. INLINE_P is TRUE if we just
15420 finished processing the body of an in-class inline function
15421 definition. (This processing will have taken place after the
15422 class definition is complete.) */
15424 tree
15426 {
15430 /* When we get some parse errors, we can end up without a
15431 current_function_decl, so cope. */
15444 /* TREE_READONLY (fndecl) = 1;
15445 This caused &foo to be of type ptr-to-const-function
15446 which then got a warning when stored in a ptr-to-function variable. */
15449 /* The current function is being defined, so its DECL_INITIAL should
15450 be set, and unless there's a multiple definition, it should be
15451 error_mark_node. */
15454 /* For a cloned function, we've already got all the code we need;
15455 there's no need to add any extra bits. */
15457 {
15458 /* Make it so that `main' always returns 0 by default. */
15465 current_eh_spec_block);
15466 }
15468 /* If we're saving up tree structure, tie off the function now. */
15476 /* If this function can't throw any exceptions, remember that. */
15479 && !flag_non_call_exceptions
15483 /* This must come after expand_function_end because cleanups might
15484 have declarations (from inline functions) that need to go into
15485 this function's blocks. */
15487 /* If the current binding level isn't the outermost binding level
15488 for this function, either there is a bug, or we have experienced
15489 syntax errors and the statement tree is malformed. */
15491 {
15492 /* Make sure we have already experienced errors. */
15495 /* Throw away the broken statement tree and extra binding
15496 levels. */
15500 {
15503 else
15505 }
15506 }
15509 /* Statements should always be full-expressions at the outermost set
15510 of curly braces for a function. */
15513 /* If there are no return statements in a function with auto return type,
15514 the return type is void. But if the declared type is something like
15515 auto*, this is an error. */
15518 {
15520 {
15523 }
15526 {
15528 current_function_auto_return_pattern);
15531 }
15532 }
15534 // If this is a concept, check that the definition is reasonable.
15538 /* Lambda closure members are implicitly constexpr if possible. */
15542 = ((processing_template_decl
15546 /* Save constexpr function body before it gets munged by
15547 the NRV transformation. */
15550 /* Invoke the pre-genericize plugin before we start munging things. */
15554 /* Perform delayed folding before NRV transformation. */
15558 /* Set up the named return value optimization, if we can. Candidate
15559 variables are selected in check_return_expr. */
15561 {
15563 tree outer;
15566 /* This is only worth doing for fns that return in memory--and
15567 simpler, since we don't have to worry about promoted modes. */
15569 /* Only allow this for variables declared in the outer scope of
15570 the function so we know that their lifetime always ends with a
15571 return; see g++.dg/opt/nrv6.C. We could be more flexible if
15572 we were to do this optimization in tree-ssa. */
15578 }
15580 /* Remember that we were in class scope. */
15584 /* Must mark the RESULT_DECL as being in this function. */
15587 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
15588 to the FUNCTION_DECL node itself. */
15591 /* Save away current state, if appropriate. */
15595 /* Complain if there's just no return statement. */
15600 /* Don't complain if we abort or throw. */
15601 && !current_function_returns_abnormally
15602 /* Don't complain if there's an infinite loop. */
15603 && !current_function_infinite_loop
15604 /* Don't complain if we are declared noreturn. */
15608 /* Structor return values (if any) are set by the compiler. */
15612 {
15616 }
15618 /* Store the end of the function, so that we get good line number
15619 info for the epilogue. */
15622 /* Complain about parameters that are only set, but never otherwise used. */
15624 && !processing_template_decl
15627 {
15628 tree decl;
15631 decl;
15645 OPT_Wunused_but_set_parameter,
15648 }
15650 /* Complain about locally defined typedefs that are not used in this
15651 function. */
15654 /* Possibly warn about unused parameters. */
15656 && !processing_template_decl
15660 /* Genericize before inlining. */
15662 {
15665 /* Clear out the bits we don't need. */
15675 }
15676 /* Clear out the bits we don't need. */
15679 /* We're leaving the context of this function, so zap cfun. It's still in
15680 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
15684 /* If this is an in-class inline definition, we may have to pop the
15685 bindings for the template parameters that we added in
15686 maybe_begin_member_template_processing when start_function was
15687 called. */
15691 /* Leave the scope of the class. */
15697 /* Clean up. */
15702 }
15703 \f
15704 /* Create the FUNCTION_DECL for a function definition.
15705 DECLSPECS and DECLARATOR are the parts of the declaration;
15706 they describe the return type and the name of the function,
15707 but twisted together in a fashion that parallels the syntax of C.
15709 This function creates a binding context for the function body
15710 as well as setting up the FUNCTION_DECL in current_function_decl.
15712 Returns a FUNCTION_DECL on success.
15714 If the DECLARATOR is not suitable for a function (it defines a datum
15715 instead), we return 0, which tells yyparse to report a parse error.
15717 May return void_type_node indicating that this method is actually
15718 a friend. See grokfield for more details.
15720 Came here with a `.pushlevel' .
15722 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
15723 CHANGES TO CODE IN `grokfield'. */
15725 tree
15728 {
15736 {
15739 }
15744 /* Pass friends other than inline friend functions back. */
15749 {
15754 }
15763 /* We process method specializations in finish_struct_1. */
15765 {
15769 }
15772 {
15774 {
15777 }
15778 }
15784 }
15785 \f
15787 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
15788 we can lay it out later, when and if its type becomes complete.
15790 Also handle constexpr variables where the initializer involves
15791 an unlowered PTRMEM_CST because the class isn't complete yet. */
15793 void
15795 {
15798 /* Keep track of variables with incomplete types. */
15801 {
15809 /* RTTI TD entries are created while defining the type_info. */
15812 {
15815 }
15819 {
15820 /* When the outermost open class is complete we can resolve any
15821 pointers-to-members. */
15825 }
15826 }
15827 }
15829 /* Called when a class type (given by TYPE) is defined. If there are
15830 any existing VAR_DECLs whose type has been completed by this
15831 declaration, update them now. */
15833 void
15835 {
15840 {
15842 {
15849 {
15850 /* Complete the type of the variable. The VAR_DECL itself
15851 will be laid out in expand_expr. */
15854 }
15856 /* Remove this entry from the list. */
15858 }
15859 else
15860 ix++;
15861 }
15863 /* Check for pending declarations which may have abstract type. */
15865 }
15867 /* If DECL is of a type which needs a cleanup, build and return an
15868 expression to perform that cleanup here. Return NULL_TREE if no
15869 cleanup need be done. DECL can also be a _REF when called from
15870 split_nonconstant_init_1. */
15872 tree
15874 {
15875 tree type;
15876 tree attr;
15877 tree cleanup;
15879 /* Assume no cleanup is required. */
15885 /* Handle "__attribute__((cleanup))". We run the cleanup function
15886 before the destructor since the destructor is what actually
15887 terminates the lifetime of the object. */
15890 else
15893 {
15894 tree id;
15895 tree fn;
15896 tree arg;
15898 /* Get the name specified by the user for the cleanup function. */
15900 /* Look up the name to find the cleanup function to call. It is
15901 important to use lookup_name here because that is what is
15902 used in c-common.c:handle_cleanup_attribute when performing
15903 initial checks on the attribute. Note that those checks
15904 include ensuring that the function found is not an overloaded
15905 function, or an object with an overloaded call operator,
15906 etc.; we can rely on the fact that the function found is an
15907 ordinary FUNCTION_DECL. */
15915 }
15916 /* Handle ordinary C++ destructors. */
15919 {
15921 tree addr;
15922 tree call;
15926 else
15937 else
15939 }
15941 /* build_delete sets the location of the destructor call to the
15942 current location, even though the destructor is going to be
15943 called later, at the end of the current scope. This can lead to
15944 a "jumpy" behavior for users of debuggers when they step around
15945 the end of the block. So let's unset the location of the
15946 destructor call instead. */
15952 /* Treat objects with destructors as used; the destructor may do
15953 something substantive. */
15958 }
15960 \f
15961 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
15962 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
15963 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
15965 tree
15967 {
15968 tree fntype;
15969 tree args;
15983 fntype = (cp_build_type_attribute_variant
15985 fntype = (build_exception_variant
15990 }
15992 /* DECL was originally constructed as a non-static member function,
15993 but turned out to be static. Update it accordingly. */
15995 void
15997 {
16010 }
16012 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
16013 one of the language-independent trees. */
16015 enum cp_tree_node_structure_enum
16017 {
16019 {
16036 }
16037 }
16039 /* Build the void_list_node (void_type_node having been created). */
16040 tree
16042 {
16045 }
16047 bool
16049 {
16050 /* A missing noreturn is ok for the `main' function. */
16052 }
16054 /* Return the decl used to identify the COMDAT group into which DECL should
16055 be placed. */
16057 tree
16059 {
16060 /* Virtual tables, construction virtual tables, and virtual table
16061 tables all go in a single COMDAT group, named after the primary
16062 virtual table. */
16065 /* For all other DECLs, the COMDAT group is the mangled name of the
16066 declaration itself. */
16067 else
16068 {
16070 {
16071 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
16072 into the same section as the target function. In that case
16073 we must return target's name. */
16079 else
16081 }
16082 }
16085 }
16087 /* Returns the return type for FN as written by the user, which may include
16088 a placeholder for a deduced return type. */
16090 tree
16092 {
16095 {
16102 }
16104 }
16106 /* Returns true iff DECL was declared with an auto type and it has
16107 not yet been deduced to a real type. */
16109 bool
16111 {
16115 }
16117 /* Complain if DECL has an undeduced return type. */
16119 bool
16121 {
16123 {
16127 }
16129 }