| blob | a3cc80cf7a30f5e95e5cde876a114131da3d6511 |
1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2017 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
56 /* Possible cases of bad specifiers type used by bad_specifiers. */
61 BSP_FIELD /* field */
62 };
100 static tree check_special_function_return_type
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
111 C++ extensions
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
123 tree vtbl_type_node;
124 tree vtbl_ptr_type_node;
126 Namespaces,
128 tree std_node;
129 tree abi_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
135 tree abort_fndecl;
137 Used by RTTI
138 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
139 tree tinfo_var_id; */
143 #define local_names cp_function_chain->x_local_names
145 /* A list of objects which have constructors or destructors
146 which reside in the global scope. The decl is stored in
147 the TREE_VALUE slot and the initializer is stored
148 in the TREE_PURPOSE slot. */
149 tree static_aggregates;
151 /* Like static_aggregates, but for thread_local variables. */
152 tree tls_aggregates;
154 /* -- end of C++ */
156 /* A node for the integer constant 2. */
158 tree integer_two_node;
160 /* vector of static decls. */
163 /* vector of keyed classes. */
166 /* Used only for jumps to as-yet undefined labels, since jumps to
167 defined labels can have their validity checked immediately. */
171 /* The binding level to which this entry is *currently* attached.
172 This is initially the binding level in which the goto appeared,
173 but is modified as scopes are closed. */
175 /* The head of the names list that was current when the goto appeared,
176 or the inner scope popped. These are the decls that will *not* be
177 skipped when jumping to the label. */
178 tree names_in_scope;
179 /* The location of the goto, for error reporting. */
180 location_t o_goto_locus;
181 /* True if an OpenMP structured block scope has been closed since
182 the goto appeared. This means that the branch from the label will
183 illegally exit an OpenMP scope. */
185 };
187 /* A list of all LABEL_DECLs in the function that have names. Here so
188 we can clear out their names' definitions at the end of the
189 function, and so we can check the validity of jumps to these labels. */
192 /* The decl itself. */
193 tree label_decl;
195 /* The binding level to which the label is *currently* attached.
196 This is initially set to the binding level in which the label
197 is defined, but is modified as scopes are closed. */
199 /* The head of the names list that was current when the label was
200 defined, or the inner scope popped. These are the decls that will
201 be skipped when jumping to the label. */
202 tree names_in_scope;
203 /* A vector of all decls from all binding levels that would be
204 crossed by a backward branch to the label. */
207 /* A list of uses of the label, before the label is defined. */
210 /* The following bits are set after the label is defined, and are
211 updated as scopes are popped. They indicate that a backward jump
212 to the label will illegally enter a scope of the given flavor. */
218 };
220 #define named_labels cp_function_chain->x_named_labels
221 \f
222 /* The number of function bodies which we are currently processing.
223 (Zero if we are at namespace scope, one inside the body of a
224 function, two inside the body of a function in a local class, etc.) */
227 /* Whether the exception-specifier is part of a function type (i.e. C++17). */
230 /* States indicating how grokdeclarator() should handle declspecs marked
231 with __attribute__((deprecated)). An object declared as
232 __attribute__((deprecated)) suppresses warnings of uses of other
233 deprecated items. */
236 \f
237 /* A list of VAR_DECLs whose type was incomplete at the time the
238 variable was declared. */
241 tree decl;
242 tree incomplete_type;
243 };
247 \f
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
252 tmpl_spec_kind
254 {
260 /* Scan through the template parameter scopes. */
264 {
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
267 like:
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
275 {
278 else
280 }
285 }
287 /* Handle explicit instantiations. */
289 {
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
298 else
300 }
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' matches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
327 else
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
334 template. */
336 }
338 /* Exit the current scope. */
340 void
342 {
344 }
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
349 static void
351 {
353 {
355 {
356 location_t location;
360 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
361 /* Avoid crashing later. */
363 }
364 else
366 }
369 }
371 /* Push all named labels into a vector, so that we can sort it on DECL_UID
372 to avoid code generation differences. */
374 int
376 {
379 }
381 /* Helper function to sort named label entries in a vector by DECL_UID. */
383 static int
385 {
393 }
395 /* At the end of a function, all labels declared within the function
396 go out of scope. BLOCK is the top-level block for the
397 function. */
399 static void
401 {
403 {
408 /* Push all the labels into a vector and sort them by DECL_UID,
409 so that gaps between DECL_UIDs don't affect code generation. */
414 {
419 /* Put the labels into the "variables" of the top-level block,
420 so debugger can see them. */
425 }
427 }
428 }
430 /* At the end of a block with local labels, restore the outer definition. */
432 static void
434 {
442 }
444 /* The following two routines are used to interface to Objective-C++.
445 The binding level is purposely treated as an opaque type. */
449 {
451 }
453 /* The following routine is used by the NeXT-style SJLJ exceptions;
454 variables get marked 'volatile' so as to not be clobbered by
455 _setjmp()/_longjmp() calls. All variables in the current scope,
456 as well as parent scopes up to (but not including) ENCLOSING_BLK
457 shall be thusly marked. */
459 void
461 {
467 {
468 tree decl;
473 /* Do not climb up past the current function. */
476 }
477 }
479 /* True if B is the level for the condition of a constexpr if. */
481 static bool
483 {
487 }
489 /* Update data for defined and undefined labels when leaving a scope. */
491 int
493 {
498 {
499 tree decl;
501 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
502 TREE_LISTs representing OVERLOADs, so be careful. */
512 {
531 }
532 }
534 {
539 {
544 }
545 }
548 }
550 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
551 when errors were reported, except for -Werror-unused-but-set-*. */
554 /* Exit a binding level.
555 Pop the level off, and restore the state of the identifier-decl mappings
556 that were in effect when this level was entered.
558 If KEEP == 1, this level had explicit declarations, so
559 and create a "block" (a BLOCK node) for the level
560 to record its declarations and subblocks for symbol table output.
562 If FUNCTIONBODY is nonzero, this level is the body of a function,
563 so create a block as if KEEP were set and also clear out all
564 label names.
566 If REVERSE is nonzero, reverse the order of decls before putting
567 them into the BLOCK. */
569 tree
571 {
572 tree link;
573 /* The chain of decls was accumulated in reverse order.
574 Put it into forward order, just for cleanliness. */
575 tree decls;
576 tree subblocks;
577 tree block;
578 tree decl;
580 scope_kind kind;
585 restart:
598 /* We used to use KEEP == 2 to indicate that the new block should go
599 at the beginning of the list of blocks at this binding level,
600 rather than the end. This hack is no longer used. */
606 /* Any uses of undefined labels, and any defined labels, now operate
607 under constraints of next binding contour. */
612 /* Get the decls in the order they were written.
613 Usually current_binding_level->names is in reverse order.
614 But parameter decls were previously put in forward order. */
617 current_binding_level->names
619 else
622 /* If there were any declarations or structure tags in that level,
623 or if this level is a function body,
624 create a BLOCK to record them for the life of this function. */
626 /* Avoid function body block if possible. */
632 {
635 }
637 /* In each subblock, record that this is its superior. */
642 /* We still support the old for-scope rules, whereby the variables
643 in a init statement were in scope after the for-statement ended.
644 We only use the new rules if flag_new_for_scope is nonzero. */
645 leaving_for_scope
648 /* Before we remove the declarations first check for unused variables. */
653 {
654 /* There are cases where D itself is a TREE_LIST. See in
655 push_local_binding where the list of decls returned by
656 getdecls is built. */
663 /* For structured bindings, consider only real variables, not
664 subobjects. */
672 {
674 {
677 OPT_Wunused_variable,
679 else
682 }
684 // For -Wunused-but-set-variable leave references alone.
687 {
692 else
694 OPT_Wunused_but_set_variable,
697 }
698 }
699 }
701 /* Remove declarations for all the DECLs in this level. */
703 {
708 /* It's hard to make this ARM compatibility hack play nicely with
709 lambdas, and it really isn't necessary in C++11 mode. */
712 {
721 /* We have something like:
723 int i;
724 for (int i; ;);
726 and we are leaving the `for' scope. There's no reason to
727 keep the binding of the inner `i' in this case. */
728 ;
731 /* Here, we have something like:
733 typedef int I;
735 void f () {
736 for (int I; ;);
737 }
739 We must pop the for-scope binding so we know what's a
740 type and what isn't. */
741 ;
742 else
743 {
744 /* Mark this VAR_DECL as dead so that we can tell we left it
745 there only for backward compatibility. */
748 /* Keep track of what should have happened when we
749 popped the binding. */
751 {
754 }
756 /* Add it to the list of dead variables in the next
757 outermost binding to that we can remove these when we
758 leave that binding. */
761 link);
763 /* Although we don't pop the cxx_binding, we do clear
764 its SCOPE since the scope is going away now. */
768 /* Don't remove the binding. */
770 }
771 }
772 /* Remove the binding. */
774 }
776 /* Remove declarations for any `for' variables from inner scopes
777 that we kept around. */
782 /* Restore the IDENTIFIER_TYPE_VALUEs. */
787 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
792 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
793 list if a `using' declaration put them there. The debugging
794 back ends won't understand OVERLOAD, so we remove them here.
795 Because the BLOCK_VARS are (temporarily) shared with
796 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
797 popped all the bindings. Also remove undeduced 'auto' decls,
798 which LTO doesn't understand, and can't have been used by anything. */
800 {
804 {
806 || (!processing_template_decl
809 else
811 }
812 }
814 /* If the level being exited is the top level of a function,
815 check over all the labels. */
817 {
819 {
820 /* Since this is the top level block of a function, the vars are
821 the function's parameters. Don't leave them in the BLOCK
822 because they are found in the FUNCTION_DECL instead. */
825 }
826 else
828 }
832 {
833 tree stmt;
835 /* If this is a temporary binding created for a cleanup, then we'll
836 have pushed a statement list level. Pop that, create a new
837 BIND_EXPR for the block, and insert it into the stream. */
841 }
845 {
846 /* The current function is being defined, so its DECL_INITIAL
847 should be error_mark_node. */
851 {
853 {
856 }
857 else
859 }
860 }
862 current_binding_level->blocks
865 /* If we did not make a block for the level just exited,
866 any blocks made for inner levels
867 (since they cannot be recorded as subblocks in that level)
868 must be carried forward so they will later become subblocks
869 of something else. */
871 current_binding_level->blocks
874 /* Each and every BLOCK node created here in `poplevel' is important
875 (e.g. for proper debugging information) so if we created one
876 earlier, mark it as "used". */
880 /* All temporary bindings created for cleanups are popped silently. */
886 }
888 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
889 /* Diagnose odr-used extern inline variables without definitions
890 in the current TU. */
892 int
894 {
896 {
897 tree decl;
900 {
910 OPT_Wunused_function,
919 }
921 /* Clear out the list, so we don't rescan next time. */
924 /* Write out any globals that need to be output. */
927 }
929 }
930 \f
931 /* In C++, you don't have to write `struct S' to refer to `S'; you
932 can just use `S'. We accomplish this by creating a TYPE_DECL as
933 if the user had written `typedef struct S S'. Create and return
934 the TYPE_DECL for TYPE. */
936 tree
938 {
939 tree decl;
943 /* There are other implicit type declarations, like the one *within*
944 a class that allows you to write `S::S'. We must distinguish
945 amongst these. */
951 }
953 /* Remember a local name for name-mangling purposes. */
955 static void
957 {
967 {
970 {
975 else
981 }
982 }
986 }
987 \f
988 /* Subroutine of duplicate_decls: return truthvalue of whether
989 or not types of these decls match.
991 For C++, we must compare the parameter list so that `int' can match
992 `int&' in a parameter position, but `int&' is not confused with
993 `const int&'. */
995 int
997 {
1004 /* If the two DECLs are not even the same kind of thing, we're not
1005 interested in their types. */
1011 {
1016 tree r2;
1018 /* Specializations of different templates are different functions
1019 even if they have the same type. */
1034 /* A new declaration doesn't match a built-in one unless it
1035 is also extern "C". */
1043 /* A declaration with deduced return type should use its pre-deduction
1044 type for declaration matching. */
1048 {
1051 #ifndef NO_IMPLICIT_EXTERN_C
1054 #endif
1055 ))
1056 {
1060 }
1061 #ifndef NO_IMPLICIT_EXTERN_C
1069 {
1072 }
1073 #endif
1074 else
1075 types_match =
1081 }
1082 else
1085 /* The decls dont match if they correspond to two different versions
1086 of the same function. Disallow extern "C" functions to be
1087 versions for now. */
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. */
1436 /* If you declare a built-in or predefined function name as static,
1437 the old definition is overridden, but optionally warn this was a
1438 bad choice of name. */
1440 {
1445 /* Discard the old built-in function. */
1447 }
1448 /* If the built-in is not ansi, then programs can override
1449 it even globally without an error. */
1454 else
1458 }
1460 {
1467 }
1469 {
1470 /* Avoid warnings redeclaring built-ins which have not been
1471 explicitly declared. */
1473 {
1476 /* A new declaration doesn't match a built-in one unless it
1477 is also extern "C". */
1487 {
1490 /* FILE, tm types are not known at the time
1491 we create the builtins. */
1497 {
1504 {
1512 newdecl_is_friend);
1514 }
1516 }
1520 next_arg:;
1521 }
1524 OPT_Wbuiltin_declaration_mismatch,
1525 "declaration of %q+#D conflicts with built-in "
1527 }
1532 {
1533 /* A near match; override the builtin. */
1537 OPT_Wbuiltin_declaration_mismatch,
1538 "new declaration %q#D ambiguates built-in "
1540 else
1545 }
1546 else
1547 /* Discard the old built-in function. */
1550 /* Replace the old RTL to avoid problems with inlining. */
1552 }
1553 /* Even if the types match, prefer the new declarations type for
1554 built-ins which have not been explicitly declared, for
1555 exception lists, etc... */
1557 {
1564 }
1566 /* If a function is explicitly declared "throw ()", propagate that to
1567 the corresponding builtin. */
1572 {
1577 }
1579 /* Whether or not the builtin can throw exceptions has no
1580 bearing on this declarator. */
1584 {
1585 /* If a builtin function is redeclared as `static', merge
1586 the declarations, but make the original one static. */
1590 /* Make the old declaration consistent with the new one so
1591 that all remnants of the builtin-ness of this function
1592 will be banished. */
1595 }
1596 }
1598 {
1599 /* C++ Standard, 3.3, clause 4:
1600 "[Note: a namespace name or a class template name must be unique
1601 in its declarative region (7.3.2, clause 14). ]" */
1608 {
1613 {
1614 /* We do nothing special here, because C++ does such nasty
1615 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1616 get shadowed, and know that if we need to find a TYPE_DECL
1617 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1618 slot of the identifier. */
1620 }
1627 }
1636 }
1638 {
1640 /* These are certainly not duplicate declarations; they're
1641 from different scopes. */
1645 {
1646 /* The name of a class template may not be declared to refer to
1647 any other template, class, function, object, namespace, value,
1648 or type in the same scope. */
1651 {
1656 }
1663 /* Template functions can be disambiguated by
1664 return type. */
1667 // Template functions can also be disambiguated by
1668 // constraints.
1670 {
1674 }
1678 }
1680 {
1682 {
1684 newdecl);
1688 }
1689 /* For function versions, params and types match, but they
1690 are not ambiguous. */
1693 // The functions have the same parameter types.
1696 // And the same constraints.
1698 {
1703 }
1704 else
1706 }
1707 else
1708 {
1713 }
1714 }
1724 /* It's OK to have a template specialization and a non-template
1725 with the same type, or to have specializations of two
1726 different templates with the same type. Note that if one is a
1727 specialization, and the other is an instantiation of the same
1728 template, that we do not exit at this point. That situation
1729 can occur if we instantiate a template class, and then
1730 specialize one of its methods. This situation is valid, but
1731 the declarations must be merged in the usual way. */
1738 /* One of the declarations is a template instantiation, and the
1739 other is not a template at all. That's OK. */
1742 {
1743 /* In [namespace.alias] we have:
1745 In a declarative region, a namespace-alias-definition can be
1746 used to redefine a namespace-alias declared in that declarative
1747 region to refer only to the namespace to which it already
1748 refers.
1750 Therefore, if we encounter a second alias directive for the same
1751 alias, we can just ignore the second directive. */
1757 /* Leave it to update_binding to merge or report error. */
1759 }
1760 else
1761 {
1764 {
1772 }
1777 {
1778 /* Prototype decl follows defn w/o prototype. */
1783 }
1786 {
1787 /* [dcl.link]
1788 If two declarations of the same function or object
1789 specify different linkage-specifications ..., the program
1790 is ill-formed.... Except for functions with C++ linkage,
1791 a function declaration without a linkage specification
1792 shall not precede the first linkage specification for
1793 that function. A function can be declared without a
1794 linkage specification after an explicit linkage
1795 specification has been seen; the linkage explicitly
1796 specified in the earlier declaration is not affected by
1797 such a function declaration.
1799 DR 563 raises the question why the restrictions on
1800 functions should not also apply to objects. Older
1801 versions of G++ silently ignore the linkage-specification
1802 for this example:
1804 namespace N {
1805 extern int i;
1806 extern "C" int i;
1807 }
1809 which is clearly wrong. Therefore, we now treat objects
1810 like functions. */
1812 {
1813 /* There is no explicit linkage-specification, so we use
1814 the linkage from the previous declaration. */
1817 }
1818 else
1819 {
1825 }
1826 }
1829 ;
1831 {
1832 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1835 as FUNCTION_DECLs. */
1837 /* C++11 8.3.6/6.
1838 Default arguments for a member function of a class
1839 template shall be specified on the initial declaration
1840 of the member function within the class template. */
1843 else
1844 {
1852 {
1855 {
1857 "default argument given for parameter "
1861 olddecl);
1862 }
1863 else
1864 {
1869 olddecl);
1870 }
1871 }
1872 }
1873 }
1874 }
1876 /* Do not merge an implicit typedef with an explicit one. In:
1878 class A;
1879 ...
1880 typedef class A A __attribute__ ((foo));
1882 the attribute should apply only to the typedef. */
1888 /* If new decl is `static' and an `extern' was seen previously,
1889 warn about it. */
1895 /* We have committed to returning 1 at this point. */
1897 {
1898 /* Now that functions must hold information normally held
1899 by field decls, there is extra work to do so that
1900 declaration information does not get destroyed during
1901 definition. */
1915 SET_OVERLOADED_OPERATOR_CODE
1919 /* Optionally warn about more than one declaration for the same
1920 name, but don't warn about a function declaration followed by a
1921 definition. */
1924 /* Don't warn about extern decl followed by definition. */
1926 /* Don't warn about friends, let add_friend take care of it. */
1928 /* Don't warn about declaration followed by specialization. */
1931 {
1933 OPT_Wredundant_decls,
1935 newdecl))
1938 }
1942 {
1944 {
1948 }
1950 }
1951 }
1953 /* Deal with C++: must preserve virtual function table size. */
1955 {
1965 }
1967 /* Copy all the DECL_... slots specified in the new decl
1968 except for any that we copy here from the old type. */
1973 {
1979 {
1982 }
1983 }
1986 {
1987 tree old_result;
1988 tree new_result;
2000 {
2001 /* Per C++11 8.3.6/4, default arguments cannot be added in later
2002 declarations of a function template. */
2011 {
2014 else
2026 }
2027 else
2028 {
2034 }
2035 }
2037 /* If the new declaration is a definition, update the file and
2038 line information on the declaration, and also make
2039 the old declaration the same definition. */
2041 {
2047 {
2048 tree parm;
2054 }
2055 }
2058 }
2061 {
2065 /* Automatically handles default parameters. */
2067 tree newtype;
2069 /* For typedefs use the old type, as the new type's DECL_NAME points
2070 at newdecl, which will be ggc_freed. */
2072 {
2073 /* But NEWTYPE might have an attribute, honor that. */
2078 {
2082 }
2084 /* And remove the new type from the variants list. */
2086 {
2091 {
2094 }
2095 }
2096 }
2097 else
2098 /* Merge the data types specified in the two decls. */
2102 {
2104 /* For already initialized vars, TREE_READONLY could have been
2105 cleared in cp_finish_decl, because the var needs runtime
2106 initialization or destruction. Make sure not to set
2107 TREE_READONLY on it again. */
2121 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2124 {
2125 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2128 }
2129 }
2131 /* An explicit specialization of a function template or of a member
2132 function of a class template can be declared transaction_safe
2133 independently of whether the corresponding template entity is declared
2134 transaction_safe. */
2147 /* Lay the type out, unless already done. */
2161 /* Merge the type qualifiers. */
2169 /* Merge deprecatedness. */
2173 /* Preserve function specific target and optimization options */
2175 {
2185 }
2187 /* Merge the initialization information. */
2190 {
2194 {
2197 }
2198 }
2201 {
2213 /* Keep the old RTL. */
2215 }
2218 {
2219 /* Keep the old RTL. We cannot keep the old RTL if the old
2220 declaration was for an incomplete object and the new
2221 declaration is not since many attributes of the RTL will
2222 change. */
2224 }
2225 }
2226 /* If cannot merge, then use the new type and qualifiers,
2227 and don't preserve the old rtl. */
2228 else
2229 {
2230 /* Clean out any memory we had of the old declaration. */
2240 }
2242 /* Merge the storage class information. */
2255 {
2264 {
2271 }
2274 {
2278 }
2283 /* If the OLDDECL is an instantiation and/or specialization,
2284 then the NEWDECL must be too. But, it may not yet be marked
2285 as such if the caller has created NEWDECL, but has not yet
2286 figured out that it is a redeclaration. */
2290 /* Don't really know how much of the language-specific
2291 values we should copy from old to new. */
2298 {
2302 {
2306 /* Remember the presence of explicit specialization args. */
2309 }
2311 }
2312 /* Only functions have these fields. */
2314 {
2319 /* DECL_THUNKS is only valid for virtual functions,
2320 otherwise it is a DECL_FRIEND_CONTEXT. */
2323 }
2324 /* Only variables have this field. */
2328 }
2331 {
2332 tree parm;
2334 /* Merge parameter attributes. */
2343 }
2347 {
2348 /* If newdecl is not a specialization, then it is not a
2349 template-related function at all. And that means that we
2350 should have exited above, returning 0. */
2354 /* From [temp.expl.spec]:
2356 If a template, a member template or the member of a class
2357 template is explicitly specialized then that
2358 specialization shall be declared before the first use of
2359 that specialization that would cause an implicit
2360 instantiation to take place, in every translation unit in
2361 which such a use occurs. */
2363 olddecl);
2369 /* Don't propagate visibility from the template to the
2370 specialization here. We'll do that in determine_visibility if
2371 appropriate. */
2374 /* [temp.expl.spec/14] We don't inline explicit specialization
2375 just because the primary template says so. */
2377 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2378 the always_inline attribute. */
2381 {
2384 else
2388 }
2389 }
2391 {
2392 /* Never inline re-defined extern inline functions.
2393 FIXME: this could be better handled by keeping both
2394 function as separate declarations. */
2396 }
2397 else
2398 {
2400 {
2404 }
2406 ;
2420 }
2422 /* Preserve abstractness on cloned [cd]tors. */
2425 /* Update newdecl's parms to point at olddecl. */
2431 {
2435 }
2437 {
2438 /* These need to be copied so that the names are available.
2439 Note that if the types do match, we'll preserve inline
2440 info and other bits, but if not, we won't. */
2443 }
2444 /* If redeclaring a builtin function, it stays built in
2445 if newdecl is a gnu_inline definition, or if newdecl is just
2446 a declaration. */
2449 {
2452 /* If we're keeping the built-in definition, keep the rtl,
2453 regardless of declaration matches. */
2456 {
2459 {
2460 /* If a compatible prototype of these builtin functions
2461 is seen, assume the runtime implements it with the
2462 expected semantics. */
2471 }
2472 }
2473 }
2475 /* If defining a function declared with other language
2476 linkage, use the previously declared language linkage. */
2479 {
2481 /* Don't clear out the arguments if we're just redeclaring a
2482 function. */
2485 }
2486 }
2490 /* Now preserve various other info from the definition. */
2496 /* Warn about conflicting visibility specifications. */
2500 {
2502 "%qD: visibility attribute ignored because it "
2506 }
2507 /* Choose the declaration which specified visibility. */
2509 {
2512 }
2513 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2514 so keep this behavior. */
2516 {
2519 }
2520 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2522 {
2525 }
2534 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2535 with that from NEWDECL below. */
2537 {
2541 }
2543 /* Merge the USED information. */
2549 {
2554 }
2560 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2561 to olddecl and deleted. */
2564 {
2565 /* Set the flag for newdecl so that it gets copied to olddecl. */
2567 /* newdecl will be purged after copying to olddecl and is no longer
2568 a version. */
2570 }
2573 {
2587 /* Preserve symtab node mapping. */
2591 /* If newdecl is a template instantiation, it is possible that
2592 the following sequence of events has occurred:
2594 o A friend function was declared in a class template. The
2595 class template was instantiated.
2597 o The instantiation of the friend declaration was
2598 recorded on the instantiation list, and is newdecl.
2600 o Later, however, instantiate_class_template called pushdecl
2601 on the newdecl to perform name injection. But, pushdecl in
2602 turn called duplicate_decls when it discovered that another
2603 declaration of a global function with the same name already
2604 existed.
2606 o Here, in duplicate_decls, we decided to clobber newdecl.
2608 If we're going to do that, we'd better make sure that
2609 olddecl, and not newdecl, is on the list of
2610 instantiations so that if we try to do the instantiation
2611 again we won't get the clobbered declaration. */
2613 new_template_info,
2614 olddecl);
2615 }
2616 else
2617 {
2624 {
2632 {
2645 }
2653 }
2654 }
2657 {
2661 {
2662 /* Merge the section attribute.
2663 We want to issue an error if the sections conflict but that must be
2664 done later in decl_attributes since we are called before attributes
2665 are assigned. */
2670 {
2674 else
2678 }
2679 }
2683 {
2687 }
2688 }
2694 {
2697 }
2699 /* NEWDECL contains the merged attribute lists.
2700 Update OLDDECL to be the same. */
2703 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2704 so that encode_section_info has a chance to look at the new decl
2705 flags and attributes. */
2712 /* The NEWDECL will no longer be needed. Because every out-of-class
2713 declaration of a member results in a call to duplicate_decls,
2714 freeing these nodes represents in a significant savings.
2716 Before releasing the node, be sore to remove function from symbol
2717 table that might have been inserted there to record comdat group.
2718 Be sure to however do not free DECL_STRUCT_FUNCTION because this
2719 structure is shared in between newdecl and oldecl. */
2723 {
2727 }
2729 /* Remove the associated constraints for newdecl, if any, before
2730 reclaiming memory. */
2737 }
2738 \f
2739 /* Return zero if the declaration NEWDECL is valid
2740 when the declaration OLDDECL (assumed to be for the same name)
2741 has already been seen.
2742 Otherwise return an error message format string with a %s
2743 where the identifier should go. */
2747 {
2749 {
2750 /* Because C++ can put things into name space for free,
2751 constructs like "typedef struct foo { ... } foo"
2752 would look like an erroneous redeclaration. */
2755 else
2757 }
2759 {
2760 /* If this is a pure function, its olddecl will actually be
2761 the original initialization to `0' (which we force to call
2762 abort()). Don't complain about redefinition in this case. */
2767 /* If both functions come from different namespaces, this is not
2768 a redeclaration - this is a conflict with a used function. */
2774 /* We'll complain about linkage mismatches in
2775 warn_extern_redeclared_static. */
2777 /* Defining the same name twice is no good. */
2780 {
2786 }
2789 {
2794 {
2798 else
2801 }
2802 }
2804 check_abi_tag_redeclaration
2809 }
2811 {
2815 {
2820 }
2838 {
2843 {
2847 else
2850 }
2851 }
2853 /* Core issue #226 (C++0x):
2855 If a friend function template declaration specifies a
2856 default template-argument, that declaration shall be a
2857 definition and shall be the only declaration of the
2858 function template in the translation unit. */
2869 }
2875 {
2876 /* Only variables can be thread-local, and all declarations must
2877 agree on this property. */
2881 else
2884 }
2886 {
2887 /* The objects have been declared at namespace scope. If either
2888 is a member of an anonymous union, then this is an invalid
2889 redeclaration. For example:
2891 int i;
2892 union { int i; };
2894 is invalid. */
2898 /* If at least one declaration is a reference, there is no
2899 conflict. For example:
2901 int i = 3;
2902 extern int i;
2904 is valid. */
2908 /* Static data member declared outside a class definition
2909 if the variable is defined within the class with constexpr
2910 specifier is declaration rather than definition (and
2911 deprecated). */
2916 {
2918 /* For now, only warn with explicit -Wdeprecated. */
2921 "redundant redeclaration of %<constexpr%> static "
2926 }
2928 /* Reject two definitions. */
2930 }
2931 else
2932 {
2933 /* Objects declared with block scope: */
2934 /* Reject two definitions, and reject a definition
2935 together with an external reference. */
2939 }
2940 }
2941 \f
2942 /* Hash and equality functions for the named_label table. */
2944 hashval_t
2946 {
2948 }
2950 bool
2952 {
2954 }
2956 /* Create a new label, named ID. */
2958 static tree
2960 {
2962 tree decl;
2970 /* Say where one reference is to the label, for the sake of the
2971 error if it is not defined. */
2974 /* Record the fact that this identifier is bound to this label. */
2977 /* Create the label htab for the function on demand. */
2981 /* Record this label on the list of labels used in this function.
2982 We do this before calling make_label_decl so that we get the
2983 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2992 }
2994 /* Look for a label named ID in the current function. If one cannot
2995 be found, create one. (We keep track of used, but undefined,
2996 labels, and complain about them at the end of a function.) */
2998 static tree
3000 {
3001 tree decl;
3003 /* You can't use labels at global scope. */
3005 {
3008 }
3010 /* See if we've already got this label. */
3017 }
3019 /* Wrapper for lookup_label_1. */
3021 tree
3023 {
3024 tree ret;
3029 }
3031 /* Declare a local label named ID. */
3033 tree
3035 {
3036 tree decl;
3037 cp_label_binding bind;
3039 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
3040 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
3048 }
3050 /* Returns nonzero if it is ill-formed to jump past the declaration of
3051 DECL. Returns 2 if it's also a real problem. */
3053 static int
3055 {
3056 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
3057 with automatic storage duration is not in scope to a point where it is
3058 in scope is ill-formed unless the variable has scalar type, class type
3059 with a trivial default constructor and a trivial destructor, a
3060 cv-qualified version of one of these types, or an array of one of the
3061 preceding types and is declared without an initializer (8.5). */
3076 }
3078 /* A subroutine of check_previous_goto_1 and check_goto to identify a branch
3079 to the user. */
3081 static bool
3083 diagnostic_t diag_kind)
3084 {
3085 bool complained
3091 }
3093 /* Check that a single previously seen jump to a newly defined label
3094 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
3095 the jump context; NAMES are the names in scope in LEVEL at the jump
3096 context; LOCUS is the source position of the jump or 0. Returns
3097 true if all is well. */
3099 static bool
3102 {
3109 {
3115 }
3118 {
3124 {
3130 {
3132 DK_PERMERROR);
3134 }
3136 {
3140 else
3142 " enters scope of %q#D which has "
3144 }
3145 }
3150 {
3152 {
3154 DK_ERROR);
3156 }
3158 {
3161 else
3163 }
3165 }
3167 {
3169 {
3171 DK_ERROR);
3173 }
3177 }
3179 {
3181 {
3183 DK_ERROR);
3185 }
3190 }
3193 {
3195 {
3197 DK_ERROR);
3199 }
3204 }
3205 }
3208 }
3210 static void
3212 {
3216 }
3218 static bool
3220 {
3222 }
3224 /* Check that a new jump to a label DECL is OK. Called by
3225 finish_goto_stmt. */
3227 void
3229 {
3233 tree bad;
3236 /* We can't know where a computed goto is jumping.
3237 So we assume that it's OK. */
3241 /* We didn't record any information about this label when we created it,
3242 and there's not much point since it's trivial to analyze as a return. */
3250 /* If the label hasn't been defined yet, defer checking. */
3252 {
3255 /* Don't bother creating another use if the last goto had the
3256 same data, and will therefore create the same set of errors. */
3270 }
3275 {
3283 }
3286 {
3290 {
3291 /* Can't skip init of __exception_info. */
3293 {
3297 }
3301 }
3303 {
3307 else
3309 " enters scope of %q#D which has "
3311 }
3312 }
3315 {
3324 }
3327 {
3330 }
3332 {
3335 {
3339 {
3341 {
3346 }
3350 }
3351 }
3352 }
3353 }
3355 /* Check that a return is ok wrt OpenMP structured blocks.
3356 Called by finish_return_stmt. Returns true if all is well. */
3358 bool
3360 {
3364 {
3367 }
3371 }
3373 /* Define a label, specifying the location in the source file.
3374 Return the LABEL_DECL node for the label. */
3376 static tree
3378 {
3381 tree decl;
3389 /* After labels, make any new cleanups in the function go into their
3390 own new (temporary) binding contour. */
3400 {
3403 }
3404 else
3405 {
3408 /* Mark label as having been defined. */
3410 /* Say where in the source. */
3419 }
3422 }
3424 /* Wrapper for define_label_1. */
3426 tree
3428 {
3429 tree ret;
3434 }
3437 struct cp_switch
3438 {
3441 /* The SWITCH_STMT being built. */
3442 tree switch_stmt;
3443 /* A splay-tree mapping the low element of a case range to the high
3444 element, or NULL_TREE if there is no high element. Used to
3445 determine whether or not a new case label duplicates an old case
3446 label. We need a tree, rather than simply a hash table, because
3447 of the GNU case range extension. */
3448 splay_tree cases;
3449 /* Remember whether there was a case value that is outside the
3450 range of the original type of the controlling expression. */
3452 };
3454 /* A stack of the currently active switch statements. The innermost
3455 switch statement is on the top of the stack. There is no need to
3456 mark the stack for garbage collection because it is only active
3457 during the processing of the body of a function, and we never
3458 collect at that point. */
3462 /* Called right after a switch-statement condition is parsed.
3463 SWITCH_STMT is the switch statement being parsed. */
3465 void
3467 {
3475 }
3477 void
3479 {
3481 location_t switch_location;
3483 /* Emit warnings as needed. */
3485 const bool bool_cond_p
3497 }
3499 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3500 condition. Note that if TYPE and VALUE are already integral we don't
3501 really do the conversion because the language-independent
3502 warning/optimization code will work better that way. */
3504 static tree
3506 {
3513 {
3516 value = (perform_implicit_conversion_flags
3519 }
3521 }
3523 /* Note that we've seen a definition of a case label, and complain if this
3524 is a bad place for one. */
3526 tree
3528 {
3531 tree type;
3534 {
3535 tree label;
3537 /* For templates, just add the case label; we'll do semantic
3538 analysis at instantiation-time. */
3541 }
3543 /* Find the condition on which this switch statement depends. */
3560 /* After labels, make any new cleanups in the function go into their
3561 own new (temporary) binding contour. */
3568 }
3569 \f
3571 tree scope;
3572 tree name;
3573 tree template_id;
3576 };
3579 {
3582 /* Hash a TYPENAME_TYPE. */
3584 static hashval_t
3586 {
3587 hashval_t hash;
3593 }
3595 /* Compare two TYPENAME_TYPEs. */
3597 static bool
3599 {
3605 }
3606 };
3608 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3609 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3611 Returns the new TYPENAME_TYPE. */
3615 tree
3618 {
3619 tree t;
3620 tree d;
3621 typename_info ti;
3623 hashval_t hash;
3638 /* See if we already have this type. */
3642 else
3643 {
3644 /* Build the TYPENAME_TYPE. */
3651 /* Build the corresponding TYPE_DECL. */
3658 /* Store it in the hash table. */
3661 /* TYPENAME_TYPEs must always be compared structurally, because
3662 they may or may not resolve down to another type depending on
3663 the currently open classes. */
3665 }
3668 }
3670 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3671 provided to name the type. Returns an appropriate type, unless an
3672 error occurs, in which case error_mark_node is returned. If we
3673 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3674 return that, rather than the _TYPE it corresponds to, in other
3675 cases we look through the type decl. If TF_ERROR is set, complain
3676 about errors, otherwise be quiet. */
3678 tree
3680 tsubst_flags_t complain)
3681 {
3682 tree fullname;
3683 tree t;
3692 {
3697 else
3698 /* Create a TEMPLATE_ID_EXPR for the type. */
3702 }
3709 {
3714 {
3718 }
3719 }
3721 {
3725 }
3730 {
3734 }
3736 /* When the CONTEXT is a dependent type, NAME could refer to a
3737 dependent base class of CONTEXT. But look inside it anyway
3738 if CONTEXT is a currently open scope, in case it refers to a
3739 member of the current instantiation or a non-dependent base;
3740 lookup will stop when we hit a dependent base. */
3742 /* We should only set WANT_TYPE when we're a nested typename type.
3743 Then we can give better diagnostics if we find a non-type. */
3745 else
3754 {
3756 {
3759 else
3762 }
3764 }
3766 /* Pull out the template from an injected-class-name (or multiple). */
3771 {
3773 {
3776 }
3778 }
3781 {
3786 }
3788 {
3793 }
3798 /* If we are currently parsing a template and if T is a typedef accessed
3799 through CONTEXT then we need to remember and check access of T at
3800 template instantiation time. */
3815 }
3817 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3818 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3819 in which case error_mark_node is returned.
3821 If PARM_LIST is non-NULL, also make sure that the template parameter
3822 list of TEMPLATE_DECL matches.
3824 If COMPLAIN zero, don't complain about any errors that occur. */
3826 tree
3828 tsubst_flags_t complain)
3829 {
3830 tree t;
3831 tree d;
3841 {
3851 {
3855 }
3859 {
3861 {
3865 }
3867 }
3870 complain))
3874 }
3876 /* Build the UNBOUND_CLASS_TEMPLATE. */
3882 /* Build the corresponding TEMPLATE_DECL. */
3891 }
3893 \f
3895 /* Push the declarations of builtin types into the global namespace.
3896 RID_INDEX is the index of the builtin type in the array
3897 RID_POINTERS. NAME is the name used when looking up the builtin
3898 type. TYPE is the _TYPE node for the builtin type.
3900 The calls to set_global_binding below should be
3901 eliminated. Built-in types should not be looked up name; their
3902 names are keywords that the parser can recognize. However, there
3903 is code in c-common.c that uses identifier_global_value to look up
3904 built-in types by name. */
3906 void
3909 tree type)
3910 {
3914 {
3920 }
3925 {
3931 }
3934 {
3938 }
3939 }
3941 /* Push a type into the namespace so that the back ends ignore it. */
3943 static void
3945 {
3948 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3955 }
3957 /* Create all the predefined identifiers. */
3959 static void
3961 {
3962 struct predefined_identifier
3963 {
3967 };
3969 /* A table of identifiers to create at startup. */
3973 /* Some of these names have a trailing space so that it is
3974 impossible for them to conflict with names written by users. */
3991 /* The demangler expects anonymous namespaces to be called
3992 something starting with '_GLOBAL__N_'. It no longer needs
3993 to be unique to the TU. */
3999 };
4003 {
4005 /* Some of these identifiers already have a special kind. */
4008 }
4009 }
4011 /* Create the predefined scalar types of C,
4012 and some nodes representing standard constants (0, 1, (void *)0).
4013 Initialize the global binding level.
4014 Make definitions for built-in primitive functions. */
4016 void
4018 {
4019 tree void_ftype;
4020 tree void_ftype_ptr;
4022 /* Create all the identifiers we need. */
4025 /* Create the global variables. */
4030 /* Enter the global namespace. */
4033 void_type_node);
4037 debug_hooks->register_main_translation_unit
4045 /* Initially, C. */
4048 /* Create the `std' namespace. */
4059 /* Guess at the initial static decls size. */
4062 /* ... and keyed classes. */
4074 NULL_TREE);
4076 #if 0
4078 #endif
4087 void_ftype_ptr
4090 /* Create the conversion operator marker. This operator's DECL_NAME
4091 is in the identifier table, so we can use identifier equality to
4092 find it. */
4094 void_ftype);
4096 /* C++ extensions */
4101 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
4104 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
4105 result. */
4112 {
4113 /* Make sure we get a unique function type, so we can give
4114 its pointer type a name. (This wins for gdb.) */
4121 }
4124 vtbl_type_node
4143 /* Now, C++. */
4148 {
4151 }
4157 {
4160 tree ptr_ftype_sizetype;
4161 tree new_eh_spec;
4163 ptr_ftype_sizetype
4166 {
4167 tree bad_alloc_id;
4168 tree bad_alloc_type_node;
4169 tree bad_alloc_decl;
4175 bad_alloc_decl
4180 new_eh_spec
4182 }
4183 else
4186 /* Ensure attribs.c is initialized. */
4189 /* Ensure constraint.cc is initialized. */
4193 NULL_TREE);
4196 extvisattr);
4210 {
4211 /* Also push the sized deallocation variants:
4212 void operator delete(void*, std::size_t) throw();
4213 void operator delete[](void*, std::size_t) throw(); */
4214 tree void_ftype_ptr_size
4218 extvisattr);
4222 }
4225 {
4232 /* operator new (size_t, align_val_t); */
4244 /* operator delete (void *, align_val_t); */
4253 {
4254 /* operator delete (void *, size_t, align_val_t); */
4257 NULL_TREE);
4262 }
4263 }
4275 }
4277 abort_fndecl
4281 /* Perform other language dependent initializations. */
4295 /* Show we use EH for cleanups. */
4298 }
4300 /* Generate an initializer for a function naming variable from
4301 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4302 filled in with the type of the init. */
4304 tree
4306 {
4308 tree type;
4313 {
4317 }
4326 else
4330 }
4332 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4333 the decl, LOC is the location to give the decl, NAME is the
4334 initialization string and TYPE_DEP indicates whether NAME depended
4335 on the type of the function. We make use of that to detect
4336 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4337 at the point of first use, so we mustn't push the decl now. */
4339 static tree
4341 {
4344 tree type;
4358 {
4362 LOOKUP_ONLYCONVERTING);
4363 }
4364 else
4365 {
4368 }
4371 }
4373 static tree
4375 {
4384 /* Runtime library routines are, by definition, available in an
4385 external shared object. */
4391 /* A function in the user's namespace should have an explicit
4392 declaration before it is used. Mark the built-in function as
4393 anticipated but not actually declared. */
4397 {
4400 /* Treat __*_chk fortification functions as anticipated as well,
4401 unless they are __builtin_*. */
4406 }
4410 else
4414 }
4416 tree
4418 {
4421 /* All builtins that don't begin with an '_' should additionally
4422 go in the 'std' namespace. */
4424 {
4429 }
4432 }
4434 /* Like cxx_builtin_function, but guarantee the function is added to the global
4435 scope. This is to allow function specific options to add new machine
4436 dependent builtins when the target ISA changes via attribute((target(...)))
4437 which saves space on program startup if the program does not use non-generic
4438 ISAs. */
4440 tree
4442 {
4446 /* All builtins that don't begin with an '_' should additionally
4447 go in the 'std' namespace. */
4449 {
4454 }
4457 }
4459 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4460 function. Not called directly. */
4462 static tree
4465 {
4472 /* Runtime library routines are, by definition, available in an
4473 external shared object. */
4478 }
4480 /* Returns the _DECL for a library function with C++ linkage. */
4482 static tree
4485 {
4490 }
4492 /* Like build_library_fn, but takes a C string instead of an
4493 IDENTIFIER_NODE. */
4495 tree
4497 {
4499 }
4501 /* Like build_cp_library_fn, but takes a C string instead of an
4502 IDENTIFIER_NODE. */
4504 tree
4506 {
4508 ecf_flags);
4509 }
4511 /* Like build_library_fn, but also pushes the function so that we will
4512 be able to find it via get_global_binding. Also, the function
4513 may throw exceptions listed in RAISES. */
4515 tree
4517 {
4518 tree fn;
4526 }
4528 /* Like build_cp_library_fn, but also pushes the function so that it
4529 will be found by normal lookup. */
4531 static tree
4534 {
4536 operator_code,
4542 }
4544 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4545 a FUNCTION_TYPE. */
4547 tree
4549 {
4552 }
4554 /* Like push_library_fn, but also note that this function throws
4555 and does not return. Used for __throw_foo and the like. */
4557 tree
4559 {
4562 }
4563 \f
4564 /* When we call finish_struct for an anonymous union, we create
4565 default copy constructors and such. But, an anonymous union
4566 shouldn't have such things; this function undoes the damage to the
4567 anonymous union type T.
4569 (The reason that we create the synthesized methods is that we don't
4570 distinguish `union { int i; }' from `typedef union { int i; } U'.
4571 The first is an anonymous union; the second is just an ordinary
4572 union type.) */
4574 void
4576 {
4577 /* Wipe out memory of synthesized methods. */
4585 /* Splice the implicitly generated functions out of TYPE_FIELDS. */
4589 else
4592 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4593 assignment operators (because they cannot have these methods themselves).
4594 For anonymous unions this is already checked because they are not allowed
4595 in any union, otherwise we have to check it. */
4597 {
4602 {
4605 {
4615 }
4616 }
4617 }
4618 }
4620 /* Warn for an attribute located at LOCATION that appertains to the
4621 class type CLASS_TYPE that has not been properly placed after its
4622 class-key, in it class-specifier. */
4624 void
4626 tree class_type)
4627 {
4631 "attribute ignored in declaration "
4636 }
4638 /* Make sure that a declaration with no declarator is well-formed, i.e.
4639 just declares a tagged type or anonymous union.
4641 Returns the type declared; or NULL_TREE if none. */
4643 tree
4646 {
4649 /* If a class, struct, or enum type is declared by the DECLSPECS
4650 (i.e, if a class-specifier, enum-specifier, or non-typename
4651 elaborated-type-specifier appears in the DECLSPECS),
4652 DECLARED_TYPE is set to the corresponding type. */
4659 {
4665 }
4678 {
4680 "%<auto%> can only be specified for variables "
4683 }
4684 /* Check for an anonymous union. */
4687 {
4688 /* 7/3 In a simple-declaration, the optional init-declarator-list
4689 can be omitted only when declaring a class (clause 9) or
4690 enumeration (7.2), that is, when the decl-specifier-seq contains
4691 either a class-specifier, an elaborated-type-specifier with
4692 a class-key (9.1), or an enum-specifier. In these cases and
4693 whenever a class-specifier or enum-specifier is present in the
4694 decl-specifier-seq, the identifiers in these specifiers are among
4695 the names being declared by the declaration (as class-name,
4696 enum-names, or enumerators, depending on the syntax). In such
4697 cases, and except for the declaration of an unnamed bit-field (9.6),
4698 the decl-specifier-seq shall introduce one or more names into the
4699 program, or shall redeclare a name introduced by a previous
4700 declaration. [Example:
4701 enum { }; // ill-formed
4702 typedef class { }; // ill-formed
4703 --end example] */
4705 {
4708 }
4715 }
4717 else
4718 {
4726 && (!current_class_type
4735 "a storage class can only be specified for objects "
4739 "%<const%> can only be specified for objects and "
4743 "%<volatile%> can only be specified for objects and "
4747 "%<__restrict%> can only be specified for objects and "
4751 "%<__thread%> can only be specified for objects "
4759 }
4762 {
4763 location_t loc;
4766 /* For a non-template class, use the name location. */
4768 else
4769 /* For a template class (an explicit instantiation), use the
4770 current location. */
4774 /* [dcl.attr.grammar]/4:
4776 No attribute-specifier-seq shall appertain to an explicit
4777 instantiation. */
4778 {
4781 declared_type))
4783 "no attribute can be applied to "
4785 }
4786 else
4788 }
4791 }
4793 /* Called when a declaration is seen that contains no names to declare.
4794 If its type is a reference to a structure, union or enum inherited
4795 from a containing scope, shadow that tag name for the current scope
4796 with a forward reference.
4797 If its type defines a new named structure or union
4798 or defines an enum, it is valid but we need not do anything here.
4799 Otherwise, it is an error.
4801 C++: may have to grok the declspecs to learn about static,
4802 complain for anonymous unions.
4804 Returns the TYPE declared -- or NULL_TREE if none. */
4806 tree
4808 {
4818 /* This is where the variables in an anonymous union are
4819 declared. An anonymous union declaration looks like:
4820 union { ... } ;
4821 because there is no declarator after the union, the parser
4822 sends that declaration here. */
4824 {
4828 {
4832 }
4833 }
4836 }
4837 \f
4838 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4840 tree
4844 {
4845 tree attrs;
4846 tree type;
4847 enum decl_context context
4853 {
4858 /* A template type parameter or other dependent type. */
4861 else
4863 }
4865 }
4867 /* Process a DECLARATOR for a function-scope variable declaration,
4868 namespace-scope variable declaration, or function declaration.
4869 (Function definitions go through start_function; class member
4870 declarations appearing in the body of the class go through
4871 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4872 If an error occurs, the error_mark_node is returned instead.
4874 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4875 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4876 for an explicitly defaulted function, or SD_DELETED for an explicitly
4877 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4878 implicitly initialized via a default constructor. ATTRIBUTES and
4879 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4881 The scope represented by the context of the returned DECL is pushed
4882 (if it is not the global namespace) and is assigned to
4883 *PUSHED_SCOPE_P. The caller is then responsible for calling
4884 pop_scope on *PUSHED_SCOPE_P if it is set. */
4886 tree
4890 tree attributes,
4891 tree prefix_attributes,
4893 {
4894 tree decl;
4895 tree context;
4902 /* An object declared as __attribute__((deprecated)) suppresses
4903 warnings of uses of other deprecated items. */
4922 /* Is it valid for this decl to have an initializer at all?
4923 If not, set INITIALIZED to zero, which will indirectly
4924 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4927 {
4930 }
4933 {
4937 decl);
4941 }
4947 /* If this is a typedef that names the class for linkage purposes
4948 (7.1.3p8), apply any attributes directly to the type. */
4953 else
4956 /* Set attributes here so if duplicate decl, will have proper attributes. */
4959 /* Dllimported symbols cannot be defined. Static data members (which
4960 can be initialized in-class and dllimported) go through grokfield,
4961 not here, so we don't need to exclude those decls when checking for
4962 a definition. */
4964 {
4967 }
4969 /* If #pragma weak was used, mark the decl weak now. */
4981 {
4985 {
4991 {
4995 else
4996 {
5002 }
5003 }
5004 else
5005 {
5010 {
5017 }
5018 /* Static data member are tricky; an in-class initialization
5019 still doesn't provide a definition, so the in-class
5020 declaration will have DECL_EXTERNAL set, but will have an
5021 initialization. Thus, duplicate_decls won't warn
5022 about this situation, and so we check here. */
5031 }
5032 }
5033 else
5034 {
5036 this_tmpl
5037 ? current_template_parms
5043 }
5045 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
5047 /* Do not mark DECL as an explicit specialization if it was not
5048 already marked as an instantiation; a declaration should
5049 never be marked as a specialization unless we know what
5050 template is being specialized. */
5052 {
5057 else
5060 /* [temp.expl.spec] An explicit specialization of a static data
5061 member of a template is a definition if the declaration
5062 includes an initializer; otherwise, it is a declaration.
5064 We check for processing_specialization so this only applies
5065 to the new specialization syntax. */
5068 }
5071 /* Aliases are definitions. */
5074 decl);
5075 }
5079 /* Enter this declaration into the symbol table. Don't push the plain
5080 VAR_DECL for a variable template. */
5093 {
5094 /* This is a const variable with implicit 'static'. Set
5095 DECL_THIS_STATIC so we can tell it from variables that are
5096 !TREE_PUBLIC because of the anonymous namespace. */
5099 }
5103 {
5107 decl);
5110 else
5114 }
5120 }
5122 /* Process the declaration of a variable DECL. INITIALIZED is true
5123 iff DECL is explicitly initialized. (INITIALIZED is false if the
5124 variable is initialized via an implicitly-called constructor.)
5125 This function must be called for ordinary variables (including, for
5126 example, implicit instantiations of templates), but must not be
5127 called for template declarations. */
5129 void
5131 {
5132 tree type;
5147 /* If an explicit initializer is present, or if this is a definition
5148 of an aggregate, then we need a complete type at this point.
5149 (Scalars are always complete types, so there is nothing to
5150 check.) This code just sets COMPLETE_P; errors (if necessary)
5151 are issued below. */
5153 && !complete_p
5155 {
5157 /* We will not yet have set TREE_READONLY on DECL if the type
5158 was "const", but incomplete, before this point. But, now, we
5159 have a complete type, so we can try again. */
5161 }
5164 /* Is it valid for this decl to have an initializer at all? */
5165 {
5166 /* Don't allow initializations for incomplete types except for
5167 arrays which might be completed by the initialization. */
5173 {
5176 }
5178 {
5181 /* else we already gave an error in start_decl. */
5182 }
5183 }
5185 {
5188 else
5189 {
5191 decl);
5192 /* Change the type so that assemble_variable will give
5193 DECL an rtl we can live with: (mem (const_int 0)). */
5195 }
5196 }
5198 /* Create a new scope to hold this declaration if necessary.
5199 Whether or not a new scope is necessary cannot be determined
5200 until after the type has been completed; if the type is a
5201 specialization of a class template it is not until after
5202 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
5203 will be set correctly. */
5205 }
5207 /* Handle initialization of references. DECL, TYPE, and INIT have the
5208 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
5209 but will be set to a new CLEANUP_STMT if a temporary is created
5210 that must be destroyed subsequently.
5212 Returns an initializer expression to use to initialize DECL, or
5213 NULL if the initialization can be performed statically.
5215 Quotes on semantics can be found in ARM 8.4.3. */
5217 static tree
5219 {
5221 {
5227 }
5231 tf_warning_or_error);
5236 /* Note: default conversion is only called in very special cases. */
5239 /* check_initializer handles this for non-reference variables, but for
5240 references we need to do it here or the initializer will get the
5241 incomplete array type and confuse later calls to
5242 cp_complete_array_type. */
5247 {
5251 }
5253 /* Convert INIT to the reference type TYPE. This may involve the
5254 creation of a temporary, whose lifetime must be the same as that
5255 of the reference. If so, a DECL_EXPR for the temporary will be
5256 added just after the DECL_EXPR for DECL. That's why we don't set
5257 DECL_INITIAL for local references (instead assigning to them
5258 explicitly); we need to allow the temporary to be initialized
5259 first. */
5261 tf_warning_or_error);
5262 }
5264 /* Designated initializers in arrays are not supported in GNU C++.
5265 The parser cannot detect this error since it does not know whether
5266 a given brace-enclosed initializer is for a class type or for an
5267 array. This function checks that CE does not use a designated
5268 initializer. If it does, an error is issued. Returns true if CE
5269 is valid, i.e., does not have a designated initializer. */
5271 static bool
5274 {
5275 /* Designated initializers for array elements are not supported. */
5277 {
5278 /* The parser only allows identifiers as designated
5279 initializers. */
5281 {
5285 }
5287 {
5291 }
5299 {
5300 /* A C99 designator is OK if it matches the current index. */
5303 else
5305 }
5306 else
5311 }
5314 }
5316 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5317 array until we finish parsing the initializer. If that's the
5318 situation we're in, update DECL accordingly. */
5320 static void
5322 {
5328 {
5329 /* do_default is really a C-ism to deal with tentative definitions.
5330 But let's leave it here to ease the eventual merge. */
5335 /* Check that there are no designated initializers in INIT, as
5336 those are not supported in GNU C++, and as the middle-end
5337 will crash if presented with a non-numeric designated
5338 initializer. */
5340 {
5343 HOST_WIDE_INT i;
5347 }
5350 {
5352 do_default);
5354 {
5358 }
5360 {
5362 {
5365 }
5366 /* If a `static' var's size isn't known, make it extern as
5367 well as static, so it does not get allocated. If it's not
5368 `static', then don't mark it extern; finish_incomplete_decl
5369 will give it a default size and it will get allocated. */
5372 }
5374 {
5377 }
5378 }
5383 }
5384 }
5386 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5387 any appropriate error messages regarding the layout. */
5389 static void
5391 {
5392 tree type;
5398 /* If we haven't already laid out this declaration, do so now.
5399 Note that we must not call complete type for an external object
5400 because it's type might involve templates that we are not
5401 supposed to instantiate yet. (And it's perfectly valid to say
5402 `extern X x' for some incomplete type `X'.) */
5411 {
5412 /* An automatic variable with an incomplete type: that is an error.
5413 Don't talk about array types here, since we took care of that
5414 message in grokdeclarator. */
5418 }
5419 #if 0
5420 /* Keep this code around in case we later want to control debug info
5421 based on whether a type is "used". (jason 1999-11-11) */
5424 /* Let debugger know it should output info for this type. */
5429 #endif
5434 {
5437 else
5438 {
5442 }
5443 }
5444 }
5446 /* If a local static variable is declared in an inline function, or if
5447 we have a weak definition, we must endeavor to create only one
5448 instance of the variable at link-time. */
5450 void
5452 {
5453 /* Static data in a function with comdat linkage also has comdat
5454 linkage. */
5456 /* Don't mess with __FUNCTION__. */
5461 {
5463 {
5464 /* With weak symbols, we simply make the variable COMDAT;
5465 that will cause copies in multiple translations units to
5466 be merged. */
5468 }
5469 else
5470 {
5473 {
5474 /* Without weak symbols, we can use COMMON to merge
5475 uninitialized variables. */
5478 }
5479 else
5480 {
5481 /* While for initialized variables, we must use internal
5482 linkage -- which means that multiple copies will not
5483 be merged. */
5489 "%q#D are wrong (you%'ll wind up with "
5491 else
5493 "static data %q#D are wrong (you%'ll wind "
5499 }
5500 }
5501 }
5502 }
5504 /* Issue an error message if DECL is an uninitialized const variable. */
5506 static void
5508 {
5511 /* ``Unless explicitly declared extern, a const object does not have
5512 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5513 7.1.6 */
5518 {
5526 else
5527 {
5531 decl);
5533 }
5536 {
5537 tree defaulted_ctor;
5544 "constructor is not user-provided because it is "
5547 "and the implicitly-defined constructor does not "
5549 }
5550 }
5551 }
5552 \f
5553 /* Structure holding the current initializer being processed by reshape_init.
5554 CUR is a pointer to the current element being processed, END is a pointer
5555 after the last element present in the initializer. */
5556 struct reshape_iter
5557 {
5560 };
5564 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5565 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5566 initialized. If there are no more such fields, the return value
5567 will be NULL. */
5569 tree
5571 {
5580 }
5582 /* Return true for [dcl.init.list] direct-list-initialization from
5583 single element of enumeration with a fixed underlying type. */
5585 bool
5587 {
5596 }
5598 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5599 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5600 INTEGER_CST representing the size of the array minus one (the maximum index),
5601 or NULL_TREE if the array was declared without specifying the size. D is
5602 the iterator within the constructor. */
5604 static tree
5606 tsubst_flags_t complain)
5607 {
5608 tree new_init;
5613 /* The initializer for an array is always a CONSTRUCTOR. */
5617 {
5618 /* Minus 1 is used for zero sized arrays. */
5624 /* sizetype is sign extended, not zero extended. */
5625 else
5627 }
5629 /* Loop until there are no more initializers. */
5633 {
5634 tree elt_init;
5639 complain);
5647 /* This can happen with an invalid initializer (c++/54501). */
5650 }
5653 }
5655 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5656 Parameters are the same of reshape_init_r. */
5658 static tree
5660 {
5669 }
5671 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5672 Parameters are the same of reshape_init_r. */
5674 static tree
5676 {
5682 {
5685 {
5690 }
5693 }
5695 /* For a vector, we initialize it as an array of the appropriate size. */
5700 }
5702 /* Subroutine of reshape_init_r, processes the initializers for classes
5703 or union. Parameters are the same of reshape_init_r. */
5705 static tree
5707 tsubst_flags_t complain)
5708 {
5709 tree field;
5710 tree new_init;
5714 /* The initializer for a class is always a CONSTRUCTOR. */
5719 {
5720 /* [dcl.init.aggr]
5722 An initializer for an aggregate member that is an
5723 empty class shall have the form of an empty
5724 initializer-list {}. */
5726 {
5730 }
5732 }
5734 /* Loop through the initializable fields, gathering initializers. */
5736 {
5737 tree field_init;
5740 /* Handle designated initializers, as an extension. */
5742 {
5747 /* We already reshaped this. */
5751 else
5752 {
5757 }
5760 {
5765 }
5766 }
5768 /* If we processed all the member of the class, we are done. */
5778 {
5779 /* This can happen with an invalid initializer for a flexible
5780 array member (c++/54441). */
5784 }
5788 /* [dcl.init.aggr]
5790 When a union is initialized with a brace-enclosed
5791 initializer, the braces shall only contain an
5792 initializer for the first member of the union. */
5797 }
5800 }
5802 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5803 designators are not valid; either complain or return true to indicate
5804 that reshape_init_r should return error_mark_node. */
5806 static bool
5808 {
5810 {
5814 else
5816 }
5818 }
5820 /* Subroutine of reshape_init, which processes a single initializer (part of
5821 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5822 iterator within the CONSTRUCTOR which points to the initializer to process.
5823 FIRST_INITIALIZER_P is true if this is the first initializer of the
5824 outermost CONSTRUCTOR node. */
5826 static tree
5828 tsubst_flags_t complain)
5829 {
5840 {
5841 /* A complex type can be initialized from one or two initializers,
5842 but braces are not elided. */
5845 {
5847 {
5850 else
5852 }
5853 }
5855 {
5863 }
5865 }
5867 /* A non-aggregate type is always initialized with a single
5868 initializer. */
5870 {
5871 /* It is invalid to initialize a non-aggregate type with a
5872 brace-enclosed initializer before C++0x.
5873 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5874 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5875 a CONSTRUCTOR (with a record type). */
5877 /* Don't complain about a capture-init. */
5880 {
5882 {
5884 /* Isn't value-initialization. */
5886 {
5889 type);
5891 }
5892 }
5893 else
5895 }
5899 }
5901 /* "If T is a class type and the initializer list has a single element of
5902 type cv U, where U is T or a class derived from T, the object is
5903 initialized from that element." Even if T is an aggregate. */
5905 && first_initializer_p
5908 {
5911 }
5913 /* [dcl.init.aggr]
5915 All implicit type conversions (clause _conv_) are considered when
5916 initializing the aggregate member with an initializer from an
5917 initializer-list. If the initializer can initialize a member,
5918 the member is initialized. Otherwise, if the member is itself a
5919 non-empty subaggregate, brace elision is assumed and the
5920 initializer is considered for the initialization of the first
5921 member of the subaggregate. */
5923 /* But don't try this for the first initializer, since that would be
5924 looking through the outermost braces; A a2 = { a1 }; is not a
5925 valid aggregate initialization. */
5926 && !first_initializer_p
5929 complain)))
5930 {
5933 }
5935 /* [dcl.init.string]
5937 A char array (whether plain char, signed char, or unsigned char)
5938 can be initialized by a string-literal (optionally enclosed in
5939 braces); a wchar_t array can be initialized by a wide
5940 string-literal (optionally enclosed in braces). */
5943 {
5946 /* Strip one level of braces if and only if they enclose a single
5947 element (as allowed by [dcl.init.string]). */
5951 {
5953 }
5955 /* If it's a string literal, then it's the initializer for the array
5956 as a whole. Otherwise, continue with normal initialization for
5957 array types (one value per array element). */
5959 {
5964 }
5965 }
5967 /* The following cases are about aggregates. If we are not within a full
5968 initializer already, and there is not a CONSTRUCTOR, it means that there
5969 is a missing set of braces (that is, we are processing the case for
5970 which reshape_init exists). */
5972 {
5974 {
5976 /* There is no need to reshape pointer-to-member function
5977 initializers, as they are always constructed correctly
5978 by the front end. */
5979 ;
5981 /* For a nested compound literal, there is no need to reshape since
5982 brace elision is not allowed. Even if we decided to allow it,
5983 we should add a call to reshape_init in finish_compound_literal,
5984 before calling digest_init, so changing this code would still
5985 not be necessary. */
5987 else
5988 {
5992 }
5993 }
5998 type);
5999 }
6001 /* Dispatch to specialized routines. */
6008 else
6010 }
6012 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
6013 brace-enclosed aggregate initializer.
6015 INIT is the CONSTRUCTOR containing the list of initializers describing
6016 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
6017 It may not presently match the shape of the TYPE; for example:
6019 struct S { int a; int b; };
6020 struct S a[] = { 1, 2, 3, 4 };
6022 Here INIT will hold a vector of four elements, rather than a
6023 vector of two elements, each itself a vector of two elements. This
6024 routine transforms INIT from the former form into the latter. The
6025 revised CONSTRUCTOR node is returned. */
6027 tree
6029 {
6031 reshape_iter d;
6032 tree new_init;
6038 /* An empty constructor does not need reshaping, and it is always a valid
6039 initializer. */
6043 /* Handle [dcl.init.list] direct-list-initialization from
6044 single element of enumeration with a fixed underlying type. */
6046 {
6050 {
6053 }
6054 else
6056 }
6058 /* Recurse on this CONSTRUCTOR. */
6066 /* Make sure all the element of the constructor were used. Otherwise,
6067 issue an error about exceeding initializers. */
6069 {
6073 }
6080 }
6082 /* Verify array initializer. Returns true if errors have been reported. */
6084 bool
6086 {
6089 /* The array type itself need not be complete, because the
6090 initializer may tell us how many elements are in the array.
6091 But, the elements of the array must be complete. */
6093 {
6097 else
6100 }
6101 /* A compound literal can't have variable size. */
6105 {
6108 }
6110 }
6112 /* Subroutine of check_initializer; args are passed down from that function.
6113 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
6115 static tree
6118 {
6121 }
6123 /* Verify INIT (the initializer for DECL), and record the
6124 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
6125 grok_reference_init.
6127 If the return value is non-NULL, it is an expression that must be
6128 evaluated dynamically to initialize DECL. */
6130 static tree
6132 {
6135 tree core_type;
6137 /* Things that are going to be initialized need to have complete
6138 type. */
6142 {
6143 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
6144 it doesn't have storage to be initialized. */
6147 }
6150 /* We will have already complained. */
6154 {
6157 }
6159 {
6164 }
6165 else
6166 /* There is no way to make a variable-sized class type in GNU C++. */
6170 {
6173 {
6175 {
6178 }
6180 {
6182 "scalar object %qD requires one element in "
6186 }
6187 }
6188 }
6191 {
6198 }
6200 ;
6203 {
6205 {
6208 }
6211 /* Do not reshape constructors of vectors (they don't need to be
6212 reshaped. */
6214 {
6216 {
6218 tf_warning_or_error);
6220 }
6222 {
6223 /* Don't reshape if the class has constructors. */
6226 "in C++98 %qD must be initialized by "
6228 decl);
6229 }
6231 {
6234 }
6235 else
6236 {
6239 }
6240 }
6244 {
6247 /* We get here with code like `int a (2);' */
6249 tf_warning_or_error);
6250 }
6252 /* If DECL has an array type without a specific bound, deduce the
6253 array size from the initializer. */
6267 {
6270 /* A constructor call is a non-trivial initializer even if
6271 it isn't explicitly written. */
6275 /* If this is a constexpr initializer, expand_default_init will
6276 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6277 case, pull the initializer back out and pass it down into
6278 store_init_value. */
6283 {
6286 /* Don't call digest_init; it's unnecessary and will complain
6287 about aggregate initialization of non-aggregate classes. */
6289 }
6291 {
6292 /* Declared constexpr, but no suitable initializer; massage
6293 init appropriately so we can pass it into store_init_value
6294 for the error. */
6297 {
6301 }
6303 }
6304 else
6306 }
6309 {
6310 /* In aggregate initialization of a variable, each element
6311 initialization is a full-expression because there is no
6312 enclosing expression. */
6327 }
6328 }
6329 else
6330 {
6338 }
6344 {
6345 /* We might have set these in cp_finish_decl. */
6348 }
6352 {
6360 else
6364 {
6368 }
6370 }
6373 }
6375 /* If DECL is not a local variable, give it RTL. */
6377 static void
6379 {
6383 /* Set the DECL_ASSEMBLER_NAME for the object. */
6385 {
6386 /* The `register' keyword, when used together with an
6387 asm-specification, indicates that the variable should be
6388 placed in a particular register. */
6390 {
6393 }
6394 else
6395 {
6400 }
6401 }
6403 /* Handle non-variables up front. */
6405 {
6408 }
6410 /* If we see a class member here, it should be a static data
6411 member. */
6413 {
6415 /* An in-class declaration of a static data member should be
6416 external; it is only a declaration, and not a definition. */
6421 }
6423 /* We don't create any RTL for local variables. */
6427 /* We defer emission of local statics until the corresponding
6428 DECL_EXPR is expanded. But with constexpr its function might never
6429 be expanded, so go ahead and tell cgraph about the variable now. */
6434 /* Defer template instantiations. */
6439 /* If we're not deferring, go ahead and assemble the variable. */
6442 }
6444 /* walk_tree helper for wrap_temporary_cleanups, below. */
6446 static tree
6448 {
6449 /* Stop at types or full-expression boundaries. */
6452 {
6455 }
6458 {
6463 /* Tell honor_protect_cleanup_actions to handle this as a separate
6464 cleanup. */
6468 }
6471 }
6473 /* We're initializing a local variable which has a cleanup GUARD. If there
6474 are any temporaries used in the initializer INIT of this variable, we
6475 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6476 variable will be cleaned up properly if one of them throws.
6478 Unfortunately, there's no way to express this properly in terms of
6479 nesting, as the regions for the temporaries overlap the region for the
6480 variable itself; if there are two temporaries, the variable needs to be
6481 the first thing destroyed if either of them throws. However, we only
6482 want to run the variable's cleanup if it actually got constructed. So
6483 we need to guard the temporary cleanups with the variable's cleanup if
6484 they are run on the normal path, but not if they are run on the
6485 exceptional path. We implement this by telling
6486 honor_protect_cleanup_actions to strip the variable cleanup from the
6487 exceptional path. */
6489 static void
6491 {
6493 }
6495 /* Generate code to initialize DECL (a local variable). */
6497 static void
6499 {
6501 tree cleanup;
6509 {
6510 /* If we used it already as memory, it must stay in memory. */
6514 }
6519 /* Compute and store the initial value. */
6524 /* Generate a cleanup, if necessary. */
6527 /* Perform the initialization. */
6529 {
6533 {
6534 /* Stick simple initializers in DECL_INITIAL so that
6535 -Wno-init-self works (c++/34772). */
6540 {
6544 OPT_Winit_self,
6546 }
6547 }
6548 else
6549 {
6552 /* If we're only initializing a single object, guard the
6553 destructors of any temporaries used in its initializer with
6554 its destructor. This isn't right for arrays because each
6555 element initialization is a full-expression. */
6564 saved_stmts_are_full_exprs_p;
6565 }
6566 }
6568 /* Set this to 0 so we can tell whether an aggregate which was
6569 initialized was ever used. Don't do this if it has a
6570 destructor, so we don't complain about the 'resource
6571 allocation is initialization' idiom. Now set
6572 attribute((unused)) on types so decls of that type will be
6573 marked used. (see TREE_USED, above.) */
6575 && ! already_used
6584 }
6586 /* DECL is a VAR_DECL for a compiler-generated variable with static
6587 storage duration (like a virtual table) whose initializer is a
6588 compile-time constant. Initialize the variable and provide it to the
6589 back end. */
6591 void
6593 {
6594 tree init;
6604 }
6606 /* INIT is the initializer for a variable, as represented by the
6607 parser. Returns true iff INIT is type-dependent. */
6609 static bool
6611 {
6613 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6616 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6617 {
6630 }
6631 else
6632 /* It must be a simple expression, e.g., int i = 3; */
6636 }
6638 /* INIT is the initializer for a variable, as represented by the
6639 parser. Returns true iff INIT is value-dependent. */
6641 static bool
6643 {
6645 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6648 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6649 {
6659 }
6660 else
6661 /* It must be a simple expression, e.g., int i = 3; */
6665 }
6667 // Returns true if a DECL is VAR_DECL with the concept specifier.
6670 {
6672 // Not all variables have DECL_LANG_SPECIFIC.
6675 }
6677 /* A helper function to be called via walk_tree. If any label exists
6678 under *TP, it is (going to be) forced. Set has_forced_label_in_static. */
6680 static tree
6682 {
6688 }
6690 /* Finish processing of a declaration;
6691 install its line number and initial value.
6692 If the length of an array type is not known before,
6693 it must be determined now, from the initial value, or it is an error.
6695 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6696 true, then INIT is an integral constant expression.
6698 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6699 if the (init) syntax was used. */
6701 void
6704 {
6705 tree type;
6710 tree auto_node;
6715 {
6719 }
6722 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6729 /* Warn about register storage specifiers except when in GNU global
6730 or local register variable extension. */
6732 {
6735 "ISO C++17 does not allow %<register%> storage "
6737 else
6740 }
6742 /* If a name was specified, get the string. */
6757 {
6758 tree d_init;
6760 {
6764 {
6765 /* init is null because we're deferring instantiating the
6766 initializer until we need it. Well, we need it now. */
6769 }
6772 }
6775 {
6779 tf_warning_or_error);
6781 }
6791 {
6796 }
6798 }
6809 {
6810 tree clone;
6812 {
6813 /* FIXME check this is 1st decl. */
6818 {
6822 }
6824 }
6826 {
6829 else
6831 }
6832 }
6835 {
6837 /* If DECL is a reference, then we want to know whether init is a
6838 reference constant; init_const_expr_p as passed tells us whether
6839 it's an rvalue constant. */
6843 {
6844 /* Set these flags now for templates. We'll update the flags in
6845 store_init_value for instantiations. */
6848 /* FIXME setting TREE_CONSTANT on refs breaks the back end. */
6851 }
6852 }
6855 {
6858 /* Add this declaration to the statement-tree. */
6865 {
6868 }
6872 /* Generally, initializers in templates are expanded when the
6873 template is instantiated. But, if DECL is a variable constant
6874 then it can be used in future constant expressions, so its value
6875 must be available. */
6880 && init_const_expr_p
6885 {
6886 /* This variable seems to be a non-dependent constant, so process
6887 its initializer. If check_initializer returns non-null the
6888 initialization wasn't constant after all. */
6889 tree init_code;
6895 }
6899 {
6900 /* Deduce array size even if the initializer is dependent. */
6902 /* And complain about multiple initializers. */
6906 tf_warning_or_error);
6907 }
6912 }
6914 /* Just store non-static data member initializers for later. */
6918 /* Take care of TYPE_DECLs up front. */
6920 {
6923 {
6927 }
6929 /* If we have installed this as the canonical typedef for this
6930 type, and that type has not been defined yet, delay emitting
6931 the debug information for it, as we will emit it later. */
6937 at_eof);
6939 }
6941 /* A reference will be modified here, as it is initialized. */
6945 {
6948 }
6951 {
6952 /* If this is a local variable that will need a mangled name,
6953 register it now. We must do this before processing the
6954 initializer for the variable, since the initialization might
6955 require a guard variable, and since the mangled name of the
6956 guard variable will depend on the mangled name of this
6957 variable. */
6961 {
6963 /* Normally has_forced_label_in_static is set during GIMPLE
6964 lowering, but [cd]tors are never actually compiled directly.
6965 We need to set this early so we can deal with the label
6966 address extension. */
6970 {
6973 }
6974 /* And make sure it's in the symbol table for
6975 c_parse_final_cleanups to find. */
6977 }
6979 /* Convert the initializer to the type of DECL, if we have not
6980 already initialized DECL. */
6982 /* If !DECL_EXTERNAL then DECL is being defined. In the
6983 case of a static data member initialized inside the
6984 class-specifier, there can be an initializer even if DECL
6985 is *not* defined. */
6987 {
6991 /* Handle:
6993 [dcl.init]
6995 The memory occupied by any object of static storage
6996 duration is zero-initialized at program startup before
6997 any other initialization takes place.
6999 We cannot create an appropriate initializer until after
7000 the type of DECL is finalized. If DECL_INITIAL is set,
7001 then the DECL is statically initialized, and any
7002 necessary zero-initialization has already been performed. */
7007 /* Remember that the initialization for this variable has
7008 taken place. */
7010 /* This declaration is the definition of this variable,
7011 unless we are initializing a static data member within
7012 the class specifier. */
7015 }
7016 /* If the variable has an array type, lay out the type, even if
7017 there is no initializer. It is valid to index through the
7018 array, and we must get TYPE_ALIGN set correctly on the array
7019 type. */
7026 /* So decl is a global variable or a static member of a
7027 non local class. Record the types it uses
7028 so that we can decide later to emit debug info for them. */
7030 }
7032 /* Add this declaration to the statement-tree. This needs to happen
7033 after the call to check_initializer so that the DECL_EXPR for a
7034 reference temp is added before the DECL_EXPR for the reference itself. */
7036 {
7037 /* If we're building a variable sized type, and we might be
7038 reachable other than via the top of the current binding
7039 level, then create a new BIND_EXPR so that we deallocate
7040 the object at the right time. */
7045 {
7046 tree bind;
7051 }
7053 }
7055 /* Let the middle end know about variables and functions -- but not
7056 static data members in uninstantiated class templates. */
7058 {
7060 {
7063 }
7065 /* This needs to happen after the linkage is set. */
7069 {
7070 /* If a TREE_READONLY variable needs initialization
7071 at runtime, it is no longer readonly and we need to
7072 avoid MEM_READONLY_P being set on RTL created for it. */
7074 {
7078 }
7082 /* Likewise if it needs destruction. */
7085 }
7089 /* Check for abstractness of the type. Notice that there is no
7090 need to strip array types here since the check for those types
7091 is already done within create_array_type_for_decl. */
7095 /* No initialization required. */
7096 ;
7098 {
7100 {
7102 {
7103 /* An out-of-class default definition is defined at
7104 the point where it is explicitly defaulted. */
7109 }
7110 else
7112 }
7113 /* else no initialization required. */
7114 }
7118 {
7121 }
7122 /* A variable definition. */
7124 /* Initialize the local variable. */
7127 /* If a variable is defined, and then a subsequent
7128 definition with external linkage is encountered, we will
7129 get here twice for the same variable. We want to avoid
7130 calling expand_static_init more than once. For variables
7131 that are not static data members, we can call
7132 expand_static_init only when we actually process the
7133 initializer. It is not legal to redeclare a static data
7134 member, so this issue does not arise in that case. */
7137 }
7139 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
7140 reference, insert it in the statement-tree now. */
7142 {
7147 }
7153 }
7155 /* For class TYPE return itself or some its bases that contain
7156 any direct non-static data members. Return error_mark_node if an
7157 error has been diagnosed. */
7159 static tree
7161 {
7169 {
7173 else
7178 }
7180 {
7188 }
7189 else
7199 {
7204 {
7206 {
7211 }
7215 /* OK, found the same base along another path. We'll complain
7218 {
7220 "classes %qT and %qT have non-static data "
7223 }
7224 else
7226 }
7227 }
7229 }
7231 /* Return std::tuple_size<TYPE>::value. */
7233 static tree
7235 {
7251 else
7253 }
7255 /* Return std::tuple_element<I,TYPE>::type. */
7257 static tree
7259 {
7267 tf_warning_or_error);
7270 }
7272 /* Return e.get<i>() or get<i>(e). */
7274 static tree
7276 {
7284 /* [The id-expression] e is an lvalue if the type of the entity e is an
7285 lvalue reference and an xvalue otherwise. */
7293 {
7298 }
7299 else
7300 {
7306 }
7307 }
7309 /* It's impossible to recover the decltype of a tuple decomposition variable
7310 based on the actual type of the variable, so store it in a hash table. */
7312 static void
7314 {
7318 }
7320 tree
7322 {
7324 }
7326 /* Finish a decomposition declaration. DECL is the underlying declaration
7327 "e", FIRST is the head of a chain of decls for the individual identifiers
7328 chained through DECL_CHAIN in reverse order and COUNT is the number of
7329 those decls. */
7331 void
7333 {
7335 {
7336 error_out:
7338 {
7341 {
7344 }
7346 }
7350 }
7354 /* This happens for range for when not in templates.
7355 Still add the DECL_VALUE_EXPRs for later processing. */
7356 || (!processing_template_decl
7358 {
7360 {
7362 {
7368 }
7372 }
7374 }
7380 {
7383 }
7389 {
7392 }
7397 {
7398 tree nelts;
7403 {
7406 }
7409 {
7410 cnt_mismatch:
7414 else
7418 }
7421 {
7429 NULL_TREE);
7432 }
7433 }
7434 /* 2 GNU extensions. */
7436 {
7442 {
7450 t);
7453 }
7454 }
7456 {
7462 {
7472 NULL_TREE);
7475 }
7476 }
7478 {
7480 {
7484 }
7490 {
7501 {
7505 }
7506 /* Save the decltype away before reference collapse. */
7512 {
7513 /* In this case the names are variables, not just proxies. */
7516 }
7520 }
7521 /* Ignore reads from the underlying decl performed during initialization
7522 of the individual variables. If those will be read, we'll mark
7523 the underlying decl as read at that point. */
7525 }
7527 {
7530 }
7532 {
7535 }
7537 {
7540 }
7541 else
7542 {
7547 {
7551 }
7555 else
7556 eltscnt++;
7561 {
7565 }
7570 else
7571 {
7573 NULL_TREE);
7579 {
7582 }
7583 i++;
7584 }
7585 }
7587 {
7590 {
7595 }
7596 }
7599 }
7601 /* Returns a declaration for a VAR_DECL as if:
7603 extern "C" TYPE NAME;
7605 had been seen. Used to create compiler-generated global
7606 variables. */
7608 static tree
7610 {
7611 tree decl;
7619 /* If the user has explicitly declared this variable (perhaps
7620 because the code we are compiling is part of a low-level runtime
7621 library), then it is possible that our declaration will be merged
7622 with theirs by pushdecl. */
7628 }
7630 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
7631 if "__cxa_atexit" is not being used) corresponding to the function
7632 to be called when the program exits. */
7634 static tree
7636 {
7637 tree fn_type;
7640 {
7641 tree arg_type;
7644 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
7646 else
7647 /* The parameter to "atexit" is "void (*)(void)". */
7653 }
7656 }
7658 /* Returns a pointer to the `atexit' function. Note that if
7659 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
7660 `__cxa_atexit' function specified in the IA64 C++ ABI. */
7662 static tree
7664 {
7665 tree atexit_fndecl;
7666 tree fn_type;
7667 tree fn_ptr_type;
7675 {
7676 /* The declaration for `__cxa_atexit' is:
7678 int __cxa_atexit (void (*)(void *), void *, void *)
7680 We build up the argument types and then the function type
7681 itself. */
7685 /* First, build the pointer-to-function type for the first
7686 argument. */
7688 /* Then, build the rest of the argument types. */
7691 {
7694 }
7695 else
7696 {
7699 }
7700 /* And the final __cxa_atexit type. */
7703 NULL_TREE);
7706 else
7708 }
7709 else
7710 {
7711 /* The declaration for `atexit' is:
7713 int atexit (void (*)());
7715 We build up the argument types and then the function type
7716 itself. */
7718 /* Build the final atexit type. */
7722 }
7724 /* Now, build the function declaration. */
7732 }
7734 /* Like get_atexit_node, but for thread-local cleanups. */
7736 static tree
7738 {
7739 /* The declaration for `__cxa_thread_atexit' is:
7741 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7745 NULL_TREE);
7747 /* Now, build the function declaration. */
7751 }
7753 /* Returns the __dso_handle VAR_DECL. */
7755 static tree
7757 {
7761 /* Declare the variable. */
7763 ptr_type_node);
7765 #ifdef HAVE_GAS_HIDDEN
7767 {
7770 }
7771 #endif
7774 }
7776 /* Begin a new function with internal linkage whose job will be simply
7777 to destroy some particular variable. */
7781 static tree
7783 {
7785 tree fntype;
7786 tree fndecl;
7792 /* No need to mangle this. */
7795 /* Build the name of the function. */
7797 /* Build the function declaration. */
7800 /* It's a function with internal linkage, generated by the
7801 compiler. */
7804 /* Make the function `inline' so that it is only emitted if it is
7805 actually needed. It is unlikely that it will be inlined, since
7806 it is only called via a function pointer, but we avoid unnecessary
7807 emissions this way. */
7810 /* Build the parameter. */
7812 {
7817 }
7825 }
7827 /* Finish the cleanup function begun by start_cleanup_fn. */
7829 static void
7831 {
7835 }
7837 /* Generate code to handle the destruction of DECL, an object with
7838 static storage duration. */
7840 tree
7842 {
7843 tree cleanup;
7844 tree addr;
7845 tree compound_stmt;
7846 tree fcall;
7847 tree type;
7850 tree atex_node;
7856 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7857 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7858 destructor to "__cxa_atexit"; we don't have to build a temporary
7859 function to do the cleanup. */
7860 dso_parm = (flag_use_cxa_atexit
7865 {
7868 /* Make sure it is accessible. */
7870 tf_warning_or_error);
7871 }
7872 else
7873 {
7874 /* Call build_cleanup before we enter the anonymous function so
7875 that any access checks will be done relative to the current
7876 scope, rather than the scope of the anonymous function. */
7879 /* Now start the function. */
7882 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7883 to the original function, rather than the anonymous one. That
7884 will make the back end think that nested functions are in use,
7885 which causes confusion. */
7890 /* Create the body of the anonymous function. */
7895 }
7897 /* Call atexit with the cleanup function. */
7903 else
7907 {
7908 /* We must convert CLEANUP to the type that "__cxa_atexit"
7909 expects. */
7911 /* "__cxa_atexit" will pass the address of DECL to the
7912 cleanup function. */
7915 /* The declared type of the parameter to "__cxa_atexit" is
7916 "void *". For plain "T*", we could just let the
7917 machinery in cp_build_function_call convert it -- but if the
7918 type is "cv-qualified T *", then we need to convert it
7919 before passing it in, to avoid spurious errors. */
7921 }
7922 else
7923 /* Since the cleanup functions we build ignore the address
7924 they're given, there's no reason to pass the actual address
7925 in, and, in general, it's cheaper to pass NULL than any
7926 other value. */
7931 tf_warning_or_error);
7933 /* Just pass NULL to the dso handle parm if we don't actually
7934 have a DSO handle on this target. */
7936 else
7940 {
7943 {
7946 }
7947 else
7948 {
7951 }
7952 }
7953 else
7954 {
7957 }
7960 }
7962 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7963 is its initializer. Generate code to handle the construction
7964 and destruction of DECL. */
7966 static void
7968 {
7972 /* Some variables require no dynamic initialization. */
7974 {
7975 /* Make sure the destructor is callable. */
7979 }
7983 {
7987 else
7992 {
7994 "C++11 %<thread_local%> allows dynamic initialization "
7997 }
7999 }
8002 {
8003 /* Emit code to perform this initialization but once. */
8008 /* We don't need thread-safety code for thread-local vars. */
8012 /* Emit code to perform this initialization but once. This code
8013 looks like:
8015 static <type> guard;
8016 if (!__atomic_load (guard.first_byte)) {
8017 if (__cxa_guard_acquire (&guard)) {
8018 bool flag = false;
8019 try {
8020 // Do initialization.
8021 flag = true; __cxa_guard_release (&guard);
8022 // Register variable for destruction at end of program.
8023 } catch {
8024 if (!flag) __cxa_guard_abort (&guard);
8025 }
8026 }
8027 }
8029 Note that the `flag' variable is only set to 1 *after* the
8030 initialization is complete. This ensures that an exception,
8031 thrown during the construction, will cause the variable to
8032 reinitialized when we pass through this code again, as per:
8034 [stmt.dcl]
8036 If the initialization exits by throwing an exception, the
8037 initialization is not complete, so it will be tried again
8038 the next time control enters the declaration.
8040 This process should be thread-safe, too; multiple threads
8041 should not be able to initialize the variable more than
8042 once. */
8044 /* Create the guard variable. */
8047 /* Begin the conditional initialization. */
8054 {
8067 acquire_fn = push_library_fn
8070 NULL_TREE),
8075 NULL_TREE);
8085 inner_if_stmt);
8093 void_node,
8097 /* Do the initialization itself. */
8099 init = add_stmt_to_compound
8101 init = add_stmt_to_compound
8103 }
8104 else
8107 /* Use atexit to register a function for destroying this static
8108 variable. */
8114 {
8118 }
8123 }
8126 else
8128 }
8130 \f
8131 /* Make TYPE a complete type based on INITIAL_VALUE.
8132 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8133 2 if there was no information (in which case assume 0 if DO_DEFAULT),
8134 3 if the initializer list is empty (in pedantic mode). */
8136 int
8138 {
8142 /* Don't get confused by a CONSTRUCTOR for some other type. */
8149 {
8151 tree value;
8153 /* An array of character type can be initialized from a
8154 brace-enclosed string constant.
8156 FIXME: this code is duplicated from reshape_init. Probably
8157 we should just call reshape_init here? */
8161 {
8168 }
8170 /* If any of the elements are parameter packs, we can't actually
8171 complete this type now because the array size is dependent. */
8173 {
8176 {
8179 }
8180 }
8181 }
8185 /* We can create the array before the element type is complete, which
8186 means that we didn't have these two bits set in the original type
8187 either. In completing the type, we are expected to propagate these
8188 bits. See also complete_type which does the same thing for arrays
8189 of fixed size. */
8192 {
8197 }
8200 }
8202 /* As above, but either give an error or reject zero-size arrays, depending
8203 on COMPLAIN. */
8205 int
8208 {
8211 /* In SFINAE context we can't be lenient about zero-size arrays. */
8218 {
8224 {
8227 }
8231 }
8233 }
8234 \f
8235 /* Return zero if something is declared to be a member of type
8236 CTYPE when in the context of CUR_TYPE. STRING is the error
8237 message to print in that case. Otherwise, quietly return 1. */
8239 static int
8241 {
8243 {
8246 else
8249 }
8251 }
8252 \f
8253 /* Subroutine of `grokdeclarator'. */
8255 /* Generate errors possibly applicable for a given set of specifiers.
8256 This is for ARM $7.1.2. */
8258 static void
8266 {
8268 {
8305 }
8309 && !flag_noexcept_type
8315 }
8317 /* DECL is a member function or static data member and is presently
8318 being defined. Check that the definition is taking place in a
8319 valid namespace. */
8321 static void
8323 {
8324 /* These checks only apply to member functions and static data
8325 members. */
8327 /* We check for problems with specializations in pt.c in
8328 check_specialization_namespace, where we can issue better
8329 diagnostics. */
8332 /* We check this in check_explicit_instantiation_namespace. */
8335 /* [class.mfct]
8337 A member function definition that appears outside of the
8338 class definition shall appear in a namespace scope enclosing
8339 the class definition.
8341 [class.static.data]
8343 The definition for a static data member shall appear in a
8344 namespace scope enclosing the member's class definition. */
8348 }
8350 /* Build a PARM_DECL for the "this" parameter of FN. TYPE is the
8351 METHOD_TYPE for a non-static member function; QUALS are the
8352 cv-qualifiers that apply to the function. */
8354 tree
8356 {
8357 tree this_type;
8358 tree qual_type;
8359 tree parm;
8360 cp_cv_quals this_quals;
8363 {
8364 this_type
8367 }
8368 else
8370 /* The `this' parameter is implicitly `const'; it cannot be
8371 assigned to. */
8377 }
8379 /* DECL is a static member function. Complain if it was declared
8380 with function-cv-quals. */
8382 static void
8384 {
8387 decl);
8388 }
8390 // Check that FN takes no arguments and returns bool.
8391 static void
8393 {
8394 // A constraint is nullary.
8398 // The declared return type of the concept shall be bool, and
8399 // it shall not be deduced from it definition.
8405 }
8407 /* Helper function. Replace the temporary this parameter injected
8408 during cp_finish_omp_declare_simd with the real this parameter. */
8410 static tree
8412 {
8421 }
8423 /* CTYPE is class type, or null if non-class.
8424 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8425 or METHOD_TYPE.
8426 DECLARATOR is the function's name.
8427 PARMS is a chain of PARM_DECLs for the function.
8428 VIRTUALP is truthvalue of whether the function is virtual or not.
8429 FLAGS are to be passed through to `grokclassfn'.
8430 QUALS are qualifiers indicating whether the function is `const'
8431 or `volatile'.
8432 RAISES is a list of exceptions that this function can raise.
8433 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8434 not look, and -1 if we should not call `grokclassfn' at all.
8436 SFK is the kind of special function (if any) for the new function.
8438 Returns `NULL_TREE' if something goes wrong, after issuing
8439 applicable error messages. */
8441 static tree
8443 tree type,
8444 tree declarator,
8445 tree parms,
8446 tree orig_declarator,
8447 tree decl_reqs,
8450 cp_cv_quals quals,
8451 cp_ref_qualifier rqual,
8452 tree raises,
8458 special_function_kind sfk,
8461 tree in_namespace,
8463 location_t location)
8464 {
8465 tree decl;
8467 tree t;
8469 // Was the concept specifier present?
8472 // Concept declarations must have a corresponding definition.
8474 {
8477 }
8486 /* Set the constraints on the declaration. */
8488 {
8493 /* Adjust the required expression into a constraint. */
8499 }
8501 /* If we have an explicit location, use it, otherwise use whatever
8502 build_lang_decl used (probably input_location). */
8507 {
8512 /* Allocate space to hold the vptr bit if needed. */
8514 }
8520 /* Propagate volatile out from type to decl. */
8524 /* Setup decl according to sfk. */
8526 {
8539 }
8542 {
8545 orig_declarator);
8546 else
8547 {
8552 {
8553 /* Something like `template <class T> friend void f<T>()'. */
8556 orig_declarator);
8558 }
8561 /* A friend declaration of the form friend void f<>(). Record
8562 the information in the TEMPLATE_ID_EXPR. */
8571 {
8574 decl);
8576 }
8579 {
8582 decl);
8584 }
8585 }
8586 }
8588 /* If this decl has namespace scope, set that up. */
8594 /* `main' and builtins have implicit 'C' linkage. */
8609 /* Should probably propagate const out from type to decl I bet (mrs). */
8611 {
8614 }
8620 {
8624 }
8627 {
8638 }
8640 /* Members of anonymous types and local classes have no linkage; make
8641 them internal. If a typedef is made later, this will be changed. */
8647 {
8648 /* [basic.link]: A name with no linkage (notably, the name of a class
8649 or enumeration declared in a local scope) shall not be used to
8650 declare an entity with linkage.
8652 DR 757 relaxes this restriction for C++0x. */
8654 }
8658 {
8661 }
8663 /* If the declaration was declared inline, mark it as such. */
8665 {
8669 }
8673 // If the concept declaration specifier was found, check
8674 // that the declaration satisfies the necessary requirements.
8676 {
8679 }
8683 {
8686 TYPE_UNQUALIFIED,
8687 REF_QUAL_NONE);
8690 {
8694 decl);
8696 }
8699 {
8703 decl);
8705 }
8706 }
8709 {
8711 {
8715 }
8719 }
8724 {
8728 /* [over.literal]/6: Literal operators shall not have C linkage. */
8730 {
8734 }
8737 {
8740 {
8743 }
8747 {
8751 }
8753 {
8757 }
8758 }
8759 else
8760 {
8763 }
8764 }
8767 /* Make the init_value nonzero so pushdecl knows this is not
8768 tentative. error_mark_node is replaced later with the BLOCK. */
8775 {
8776 /* Adjust "omp declare simd" attributes. */
8779 {
8780 tree attr;
8783 {
8788 {
8790 cl = c_omp_declare_simd_clauses_to_numbers
8794 else
8796 }
8797 }
8798 }
8799 }
8801 /* Caller will do the rest of this. */
8808 /* 12.4/3 */
8816 template_count,
8827 {
8830 }
8832 /* Check main's type after attributes have been applied. */
8834 {
8836 integer_type_node))
8837 {
8839 tree newtype;
8843 }
8846 }
8849 {
8851 (processing_template_decl
8853 ? current_template_parms
8860 {
8861 tree ok;
8862 tree pushed_scope;
8865 /* Because grokfndecl is always supposed to return a
8866 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8867 here. We depend on our callers to figure out that its
8868 really a template that's being returned. */
8873 {
8874 /* Remove the `this' parm added by grokclassfn. */
8877 }
8879 {
8882 }
8884 {
8889 }
8891 /* Since we've smashed OLD_DECL to its
8892 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8896 /* Attempt to merge the declarations. This can fail, in
8897 the case of some invalid specialization declarations. */
8903 {
8907 }
8911 }
8912 }
8924 }
8926 /* decl is a FUNCTION_DECL.
8927 specifiers are the parsed virt-specifiers.
8929 Set flags to reflect the virt-specifiers.
8931 Returns decl. */
8933 static tree
8935 {
8943 }
8945 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8946 the linkage that DECL will receive in the object file. */
8948 static void
8950 {
8951 /* A static data member always has static storage duration and
8952 external linkage. Note that static data members are forbidden in
8953 local classes -- the only situation in which a class has
8954 non-external linkage. */
8957 /* For non-template classes, static data members are always put
8958 out in exactly those files where they are defined, just as
8959 with ordinary namespace-scope variables. */
8962 }
8964 /* Create a VAR_DECL named NAME with the indicated TYPE.
8966 If SCOPE is non-NULL, it is the class type or namespace containing
8967 the variable. If SCOPE is NULL, the variable should is created in
8968 the innermost enclosing scope. */
8970 static tree
8972 tree name,
8973 tree orig_declarator,
8980 tree scope)
8981 {
8982 tree decl;
8983 tree explicit_scope;
8990 /* Compute the scope in which to place the variable, but remember
8991 whether or not that scope was explicitly specified by the user. */
8994 {
8995 /* An explicit "extern" specifier indicates a namespace-scope
8996 variable. */
9001 }
9005 template, we need DECL_LANG_SPECIFIC. */
9007 /* Similarly for namespace-scope variables with language linkage
9008 other than C++. */
9011 /* Similarly for static data members. */
9013 /* Similarly for explicit specializations. */
9014 || (orig_declarator
9017 else
9022 else
9026 {
9029 }
9032 {
9034 /* This function is only called with out-of-class definitions. */
9037 }
9038 /* At top level, either `static' or no s.c. makes a definition
9039 (perhaps tentative), and absence of `static' makes it public. */
9041 {
9044 || ! constp
9045 || volatilep
9048 }
9049 /* Not at top level, only `static' makes a static definition. */
9050 else
9051 {
9054 }
9057 {
9059 {
9063 }
9066 }
9068 /* If the type of the decl has no linkage, make sure that we'll
9069 notice that in mark_used. */
9078 {
9079 /* [basic.link]: A name with no linkage (notably, the name of a class
9080 or enumeration declared in a local scope) shall not be used to
9081 declare an entity with linkage.
9083 DR 757 relaxes this restriction for C++0x. */
9086 }
9087 else
9095 /* Check that the variable can be safely declared as a concept.
9096 Note that this also forbids explicit specializations. */
9098 {
9100 {
9103 }
9104 else
9109 }
9112 {
9116 }
9118 // Handle explicit specializations and instantiations of variable templates.
9124 }
9126 /* Create and return a canonical pointer to member function type, for
9127 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
9129 tree
9131 {
9133 tree t;
9138 /* Make sure that we always have the unqualified pointer-to-member
9139 type first. */
9141 {
9144 }
9146 /* If a canonical type already exists for this type, use it. We use
9147 this method instead of type_hash_canon, because it only does a
9148 simple equality check on the list of field members. */
9156 /* Let the front end know this is a pointer to member function. */
9163 delta_type_node);
9169 /* Zap out the name so that the back end will give us the debugging
9170 information for this anonymous RECORD_TYPE. */
9173 /* Cache this pointer-to-member type so that we can find it again
9174 later. */
9183 }
9185 /* Create and return a pointer to data member type. */
9187 tree
9189 {
9191 {
9196 }
9197 else
9198 {
9201 }
9202 }
9204 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
9205 Check to see that the definition is valid. Issue appropriate error
9206 messages. Return 1 if the definition is particularly bad, or 0
9207 otherwise. */
9209 static int
9211 {
9212 /* Avoid redundant diagnostics on out-of-class definitions. */
9215 /* Can't check yet if we don't know the type. */
9218 /* If DECL is declared constexpr, we'll do the appropriate checks
9219 in check_initializer. Similarly for inline static data members. */
9225 {
9228 "in-class initialization of static data member %q#D of "
9232 "%<constexpr%> needed for in-class initialization of "
9234 else
9236 "in-class initialization of static data member %q#D of "
9239 }
9241 /* Motion 10 at San Diego: If a static const integral data member is
9242 initialized with an integral constant expression, the initializer
9243 may appear either in the declaration (within the class), or in
9244 the definition, but not both. If it appears in the class, the
9245 member is a member constant. The file-scope definition is always
9246 required. */
9248 {
9250 "invalid in-class initialization of static data member "
9252 type);
9254 }
9257 "ISO C++ forbids in-class initialization of non-const "
9259 decl);
9262 "ISO C++ forbids initialization of member constant "
9266 }
9268 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
9269 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
9270 expressions out into temporary variables so that walk_tree doesn't
9271 step into them (c++/15764). */
9273 static tree
9275 {
9279 {
9285 }
9289 }
9291 /* Entry point for the above. */
9293 static void
9295 {
9297 /* Break out any function calls into temporary variables. */
9299 }
9301 /* Reduce a SIZEOF_EXPR to its value. */
9303 tree
9305 {
9306 tree r;
9313 else
9319 }
9321 /* Given the SIZE (i.e., number of elements) in an array, compute
9322 an appropriate index type for the array. If non-NULL, NAME is
9323 the name of the entity being declared. */
9325 tree
9327 {
9328 tree itype;
9335 {
9342 /* In C++98, we mark a non-constant array bound with a magic
9344 else
9345 {
9350 {
9353 {
9359 else
9362 }
9366 }
9373 }
9378 /* The array bound must be an integer type. */
9380 {
9385 else
9389 }
9390 }
9392 /* A type is dependent if it is...an array type constructed from any
9393 dependent type or whose size is specified by a constant expression
9394 that is value-dependent. */
9395 /* We can only call value_dependent_expression_p on integral constant
9396 expressions; treat non-constant expressions as dependent, too. */
9400 {
9401 /* We cannot do any checking for a SIZE that isn't known to be
9402 constant. Just build the index type and mark that it requires
9403 structural equality checks. */
9410 }
9413 {
9418 /* Use the folded result for VLAs, too; it will have resolved
9419 SIZEOF_EXPR. */
9421 }
9423 /* Normally, the array-bound will be a constant. */
9425 {
9426 /* Check to see if the array bound overflowed. Make that an
9427 error, no matter how generous we're being. */
9430 /* An array must have a positive number of elements. */
9432 {
9437 else
9440 }
9441 /* As an extension we allow zero-sized arrays. */
9443 {
9445 /* We must fail if performing argument deduction (as
9446 indicated by the state of complain), so that
9447 another substitution can be found. */
9453 else
9455 }
9456 }
9458 /* We don't allow VLAs at non-function scopes, or during
9459 tentative template substitution. */
9462 {
9465 /* `(int) &fn' is not a valid array bound. */
9468 name);
9469 else
9472 }
9474 {
9477 else
9479 }
9481 {
9485 else
9488 }
9491 /* A variable sized array. */
9493 else
9494 {
9495 HOST_WIDE_INT saved_processing_template_decl;
9497 /* Compute the index of the largest element in the array. It is
9498 one less than the number of elements in the array. We save
9499 and restore PROCESSING_TEMPLATE_DECL so that computations in
9500 cp_build_binary_op will be appropriately folded. */
9504 MINUS_EXPR,
9507 complain),
9508 complain);
9513 {
9514 /* A variable sized array. */
9521 {
9522 /* We have to add 1 -- in the ubsan routine we generate
9523 LE_EXPR rather than LT_EXPR. */
9528 }
9529 }
9530 /* Make sure that there was no overflow when creating to a signed
9531 index type. (For example, on a 32-bit machine, an array with
9532 size 2^32 - 1 is too big.) */
9535 {
9540 }
9541 }
9543 /* Create and return the appropriate index type. */
9546 /* If the index type were dependent, we would have returned early, so
9547 remember that it isn't. */
9551 }
9553 /* Returns the scope (if any) in which the entity declared by
9554 DECLARATOR will be located. If the entity was declared with an
9555 unqualified name, NULL_TREE is returned. */
9557 tree
9559 {
9563 /* If the declarator-id is a SCOPE_REF, the scope in which the
9564 declaration occurs is the first operand. */
9569 /* Otherwise, the declarator is not a qualified name; the entity will
9570 be declared in the current scope. */
9572 }
9574 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
9575 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
9576 with this type. */
9578 static tree
9580 {
9583 /* If things have already gone awry, bail now. */
9587 /* 8.3.4/1: If the type of the identifier of D contains the auto
9588 type-specifier, the program is ill-formed. */
9590 {
9593 }
9595 /* If there are some types which cannot be array elements,
9596 issue an error-message and return. */
9598 {
9602 else
9609 else
9616 else
9623 else
9629 }
9631 /* [dcl.array]
9633 The constant expressions that specify the bounds of the arrays
9634 can be omitted only for the first member of the sequence. */
9636 {
9640 name);
9641 else
9646 }
9648 /* Figure out the index type for the array. */
9652 /* [dcl.array]
9653 T is called the array element type; this type shall not be [...] an
9654 abstract class type. */
9658 }
9660 /* Returns the smallest location != UNKNOWN_LOCATION among the
9661 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
9662 and LOCATIONS[ds_restrict]. */
9664 static location_t
9666 {
9681 }
9683 /* Check that it's OK to declare a function with the indicated TYPE
9684 and TYPE_QUALS. SFK indicates the kind of special function (if any)
9685 that this function is. OPTYPE is the type given in a conversion
9686 operator declaration, or the class type for a constructor/destructor.
9687 Returns the actual return type of the function; that may be different
9688 than TYPE if an error occurs, or for certain special functions. */
9690 static tree
9692 tree type,
9693 tree optype,
9696 {
9698 {
9708 else
9719 /* We can't use the proper return type here because we run into
9720 problems with ambiguous bases and covariant returns. */
9723 else
9732 "qualifiers are not allowed on declaration of "
9743 "qualifiers are not allowed on declaration of "
9754 }
9757 }
9759 /* A variable or data member (whose unqualified name is IDENTIFIER)
9760 has been declared with the indicated TYPE. If the TYPE is not
9761 acceptable, issue an error message and return a type to use for
9762 error-recovery purposes. */
9764 tree
9766 {
9768 {
9772 {
9775 }
9776 else
9779 }
9782 }
9784 /* Handle declaring DECL as an inline variable. */
9786 static void
9788 {
9791 {
9795 }
9798 "inline variables are only available "
9801 {
9804 }
9805 }
9808 /* Assign a typedef-given name to a class or enumeration type declared
9809 as anonymous at first. This was split out of grokdeclarator
9810 because it is also used in libcc1. */
9812 void
9814 {
9817 /* Replace the anonymous name with the real name everywhere. */
9819 {
9821 /* We do not rename the debug info representing the
9822 unnamed tagged type because the standard says in
9823 [dcl.typedef] that the naming applies only for
9824 linkage purposes. */
9825 /*debug_hooks->set_name (t, decl);*/
9827 }
9832 /* If this is a typedef within a template class, the nested
9833 type is a (non-primary) template. The name for the
9834 template needs updating as well. */
9839 /* Adjust linkage now that we aren't unnamed anymore. */
9842 /* FIXME remangle member functions; member functions of a
9843 type with external linkage have external linkage. */
9845 /* Check that our job is done, and that it would fail if we
9846 attempted to do it again. */
9848 }
9850 /* Given declspecs and a declarator (abstract or otherwise), determine
9851 the name and type of the object declared and construct a DECL node
9852 for it.
9854 DECLSPECS points to the representation of declaration-specifier
9855 sequence that precedes declarator.
9857 DECL_CONTEXT says which syntactic context this declaration is in:
9858 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9859 FUNCDEF for a function definition. Like NORMAL but a few different
9860 error messages in each case. Return value may be zero meaning
9861 this definition is too screwy to try to parse.
9862 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9863 handle member functions (which have FIELD context).
9864 Return value may be zero meaning this definition is too screwy to
9865 try to parse.
9866 PARM for a parameter declaration (either within a function prototype
9867 or before a function body). Make a PARM_DECL, or return void_type_node.
9868 TPARM for a template parameter declaration.
9869 CATCHPARM for a parameter declaration before a catch clause.
9870 TYPENAME if for a typename (in a cast or sizeof).
9871 Don't make a DECL node; just return the ..._TYPE node.
9872 FIELD for a struct or union field; make a FIELD_DECL.
9873 BITFIELD for a field with specified width.
9875 INITIALIZED is as for start_decl.
9877 ATTRLIST is a pointer to the list of attributes, which may be NULL
9878 if there are none; *ATTRLIST may be modified if attributes from inside
9879 the declarator should be applied to the declaration.
9881 When this function is called, scoping variables (such as
9882 CURRENT_CLASS_TYPE) should reflect the scope in which the
9883 declaration occurs, not the scope in which the new declaration will
9884 be placed. For example, on:
9886 void S::f() { ... }
9888 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
9889 should not be `S'.
9891 Returns a DECL (if a declarator is present), a TYPE (if there is no
9892 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
9893 error occurs. */
9895 tree
9901 {
9913 /* True if this declarator is a function definition. */
9917 #if 0
9918 /* See the code below that used this. */
9920 #endif
9922 /* Keep track of what sort of function is being processed
9923 so that we can warn about default return values, or explicit
9924 return values which do not match prescribed defaults. */
9930 /* cv-qualifiers that apply to the declarator, for a declaration of
9931 a member function. */
9933 /* virt-specifiers that apply to the declarator, for a declaration of
9934 a member function. */
9936 /* ref-qualifier that applies to the declarator, for a declaration of
9937 a member function. */
9939 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
9946 /* The unqualified name of the declarator; either an
9947 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
9948 tree unqualified_id;
9949 /* The class type, if any, in which this entity is located,
9950 or NULL_TREE if none. Note that this value may be different from
9951 the current class type; for example if an attempt is made to declare
9952 "A::f" inside "B", this value will be "A". */
9954 /* The NAMESPACE_DECL for the namespace in which this entity is
9955 located. If an unqualified name is used to declare the entity,
9956 this value will be NULL_TREE, even if the entity is located at
9957 namespace scope. */
9959 cp_storage_class storage_class;
9980 // Was concept_p specified? Note that ds_concept
9981 // implies ds_constexpr!
10014 /* Look inside a declarator for the name being declared
10015 and get it as a string, for an error message. */
10017 id_declarator;
10019 {
10024 {
10028 {
10032 }
10036 {
10042 {
10044 {
10045 /* [dcl.meaning]
10047 A declarator-id shall not be qualified except
10048 for ...
10050 None of the cases are permitted in block
10051 scope. */
10054 decl);
10058 else
10062 }
10064 {
10067 {
10070 }
10072 && current_class_type
10074 current_class_type))
10075 {
10079 }
10080 }
10083 }
10085 {
10087 {
10089 {
10092 }
10095 {
10098 }
10105 }
10109 {
10115 }
10116 /* Fall through. */
10123 {
10125 dname);
10127 }
10130 else
10131 {
10138 else
10140 }
10145 }
10147 }
10164 }
10167 }
10169 /* [dcl.fct.edf]
10171 The declarator in a function-definition shall have the form
10172 D1 ( parameter-declaration-clause) ... */
10174 {
10177 }
10182 {
10185 }
10188 {
10191 {
10194 }
10197 {
10199 {
10202 }
10204 {
10207 }
10208 }
10209 }
10211 /* Anything declared one level down from the top level
10212 must be one of the parameters of a function
10213 (because the body is at least two levels down). */
10215 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
10216 by not allowing C++ class definitions to specify their parameters
10217 with xdecls (must be spec.d in the parmlist).
10219 Since we now wait to push a class scope until we are sure that
10220 we are in a legitimate method context, we must set oldcname
10221 explicitly (since current_class_name is not yet alive).
10223 We also want to avoid calling this a PARM if it is in a namespace. */
10226 {
10232 }
10238 {
10241 }
10244 {
10247 }
10249 /* If there were multiple types specified in the decl-specifier-seq,
10250 issue an error message. */
10252 {
10255 }
10258 {
10261 }
10263 /* Extract the basic type from the decl-specifier-seq. */
10266 {
10269 }
10270 /* If the entire declaration is itself tagged as deprecated then
10271 suppress reports of deprecated items. */
10276 {
10283 }
10284 /* No type at all: default to `int', and set DEFAULTED_INT
10285 because it was not a user-defined typedef. */
10287 {
10289 {
10290 /* These imply 'int'. */
10293 }
10294 /* If we just have "complex", it is equivalent to "complex double". */
10297 {
10300 "ISO C++ does not support plain %<complex%> meaning "
10302 }
10303 }
10304 /* Gather flags. */
10308 #if 0
10309 /* See the code below that used this. */
10312 #endif
10317 else
10321 {
10323 ctor_return_type,
10324 type_quals,
10327 }
10329 {
10334 /* We handle `main' specially here, because 'main () { }' is so
10335 common. With no options, it is allowed. With -Wreturn-type,
10336 it is a warning. It is only an error with -pedantic-errors. */
10337 is_main = (funcdef_flag
10353 else
10358 /* FIXME we should be able to propagate the error_mark_node as is
10359 for other contexts too. */
10361 else
10363 }
10368 {
10370 {
10374 }
10379 }
10381 /* Now process the modifiers that were specified
10382 and check for invalid combinations. */
10384 /* Long double is a special combination. */
10386 {
10390 }
10392 /* Check all other uses of type modifiers. */
10395 {
10417 {
10422 }
10423 else
10424 {
10427 {
10430 name);
10433 }
10434 }
10436 /* Discard the type modifiers if they are invalid. */
10438 {
10444 }
10445 }
10447 /* Decide whether an integer type is signed or not.
10448 Optionally treat bitfields as signed by default. */
10450 /* [class.bit]
10452 It is implementation-defined whether a plain (neither
10453 explicitly signed or unsigned) char, short, int, or long
10454 bit-field is signed or unsigned.
10456 Naturally, we extend this to long long as well. Note that
10457 this does not include wchar_t. */
10459 && !signed_p
10460 /* A typedef for plain `int' without `signed' can be
10461 controlled just like plain `int', but a typedef for
10462 `signed int' cannot be so controlled. */
10463 && !(typedef_decl
10467 {
10480 else
10482 }
10495 {
10498 /* If a modifier is specified, the resulting complex is the complex
10499 form of TYPE. E.g, "complex short" is "complex short int". */
10508 else
10510 }
10512 /* If we're using the injected-class-name to form a compound type or a
10513 declaration, replace it with the underlying class so we don't get
10514 redundant typedefs in the debug output. But if we are returning the
10515 type unchanged, leave it alone so that it's available to
10516 maybe_get_template_decl_from_type_decl. */
10524 type = cp_build_qualified_type_real
10528 /* We might have ignored or rejected some of the qualifiers. */
10535 {
10539 }
10551 {
10553 {
10558 }
10562 }
10565 /* Issue errors about use of storage classes for parameters. */
10567 {
10569 {
10572 }
10574 {
10577 }
10583 /* Function parameters cannot be concept. */
10586 /* Function parameters cannot be constexpr. If we saw one, moan
10587 and pretend it wasn't there. */
10589 {
10592 }
10593 }
10595 /* Give error if `virtual' is used outside of class declaration. */
10598 {
10602 }
10605 {
10620 declspecs->gnu_thread_keyword_p
10626 {
10651 }
10654 {
10656 {
10660 "type must be cv-qualified %<auto%> or reference to "
10662 }
10665 }
10675 }
10677 /* Static anonymous unions are dealt with here. */
10683 /* Warn about storage classes that are invalid for certain
10684 kinds of declarations (parameters, typenames, etc.). */
10686 && ((storage_class
10690 {
10693 }
10698 {
10702 ;
10704 ;
10706 /* C++ allows static class elements. */
10708 /* C++ also allows inlines and signed and unsigned elements,
10709 but in those cases we don't come in here. */
10710 ;
10711 else
10712 {
10715 else
10716 {
10719 else
10721 }
10727 }
10728 }
10733 {
10736 }
10740 {
10745 /* When thread_local is applied to a variable of block scope the
10746 storage-class-specifier static is implied if it does not appear
10747 explicitly. */
10750 }
10753 {
10757 }
10761 else
10762 {
10765 {
10778 }
10779 }
10782 {
10783 /* Apply the c++11 attributes to the type preceding them. */
10787 }
10789 /* Determine the type of the entity declared by recurring on the
10790 declarator. */
10792 {
10794 tree attrs;
10801 {
10813 attr_flags);
10814 }
10816 /* We don't want to warn in parmeter context because we don't
10817 yet know if the parse will succeed, and this might turn out
10818 to be a constructor call. */
10829 {
10837 /* [dcl.array]/1:
10839 The optional attribute-specifier-seq appertains to the
10840 array. */
10846 {
10847 tree arg_types;
10850 /* Declaring a function type. */
10856 /* Pick up type qualifiers which should be applied to `this'. */
10858 /* Pick up virt-specifiers. */
10860 /* And ref-qualifier, too */
10862 /* And tx-qualifier. */
10864 /* Pick up the exception specifications. */
10866 /* If the exception-specification is ill-formed, let's pretend
10867 there wasn't one. */
10875 /* Say it's a definition only for the CALL_EXPR
10876 closest to the identifier. */
10879 /* Handle a late-specified return type. */
10882 {
10884 {
10886 {
10891 {
10893 "%<auto%> type specifier without trailing "
10896 "only available with -std=c++14 or "
10898 }
10900 {
10904 }
10905 }
10907 {
10912 }
10914 {
10916 {
10919 "for %qT must have trailing return "
10921 else
10924 type);
10927 }
10933 else
10937 }
10938 }
10941 {
10943 /* Not using maybe_warn_cpp0x because this should
10944 always be an error. */
10947 else
10951 }
10952 }
10958 {
10961 }
10964 {
10968 /* We now know that the TYPE_QUALS don't apply to the
10969 decl, but to its return type. */
10971 }
10973 /* Error about some types functions can't return. */
10976 {
10980 }
10982 {
10986 }
10990 && funcdecl_p
10996 {
10997 /* We are within a class's scope. If our declarator name
10998 is the same as the class name, and we are defining
10999 a function, then it is a constructor/destructor, and
11000 therefore returns a void type. */
11002 /* ISO C++ 12.4/2. A destructor may not be declared
11003 const or volatile. A destructor may not be static.
11004 A destructor may not be declared with ref-qualifier.
11006 ISO C++ 12.1. A constructor may not be declared
11007 const or volatile. A constructor may not be
11008 virtual. A constructor may not be static.
11009 A constructor may not be declared with ref-qualifier. */
11015 {
11020 }
11023 {
11029 }
11033 current_class_type,
11034 flags))
11038 {
11039 /* It's a constructor. */
11043 {
11047 }
11051 }
11054 }
11056 {
11058 {
11059 /* Cannot be both friend and virtual. */
11062 }
11068 name);
11069 }
11071 {
11073 {
11076 }
11079 }
11081 {
11084 }
11093 {
11097 }
11103 {
11105 /* transaction_safe applies to the type, but
11106 transaction_safe_dynamic applies to the function. */
11109 else
11111 }
11113 /* [dcl.fct]/2:
11115 The optional attribute-specifier-seq appertains to
11116 the function type. */
11121 }
11127 /* Filter out pointers-to-references and references-to-references.
11128 We can get these if a TYPE_DECL is used. */
11131 {
11133 {
11136 }
11138 /* In C++0x, we allow reference to reference declarations
11139 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
11140 and template type arguments [14.3.1/4 temp.arg.type]. The
11141 check for direct reference to reference declarations, which
11142 are still forbidden, occurs below. Reasoning behind the change
11143 can be found in DR106, DR540, and the rvalue reference
11144 proposals. */
11146 {
11149 }
11150 }
11152 {
11157 }
11159 /* We now know that the TYPE_QUALS don't apply to the decl,
11160 but to the target of the pointer. */
11163 /* This code used to handle METHOD_TYPE, but I don't think it's
11164 possible to get it here anymore. */
11168 {
11172 memfn_quals,
11173 rqual);
11179 }
11187 type);
11189 /* When the pointed-to type involves components of variable size,
11190 care must be taken to ensure that the size evaluation code is
11191 emitted early enough to dominate all the possible later uses
11192 and late enough for the variables on which it depends to have
11193 been assigned.
11195 This is expected to happen automatically when the pointed-to
11196 type has a name/declaration of it's own, but special attention
11197 is required if the type is anonymous.
11199 We handle the NORMAL and FIELD contexts here by inserting a
11200 dummy statement that just evaluates the size at a safe point
11201 and ensures it is not deferred until e.g. within a deeper
11202 conditional context (c++/43555).
11204 We expect nothing to be needed here for PARM or TYPENAME.
11205 Evaluating the size at this point for TYPENAME would
11206 actually be incorrect, as we might be in the middle of an
11207 expression with side effects on the pointed-to type size
11208 "arguments" prior to the pointer declaration point and the
11209 size evaluation could end up prior to the side effects. */
11215 {
11219 }
11222 {
11223 /* In C++0x, the type we are creating a reference to might be
11224 a typedef which is itself a reference type. In that case,
11225 we follow the reference collapsing rules in
11226 [7.1.3/8 dcl.typedef] to create the final reference type:
11228 "If a typedef TD names a type that is a reference to a type
11229 T, an attempt to create the type 'lvalue reference to cv TD'
11230 creates the type 'lvalue reference to T,' while an attempt
11231 to create the type "rvalue reference to cv TD' creates the
11232 type TD."
11233 */
11237 {
11240 else
11242 }
11243 else
11244 type = cp_build_reference_type
11247 /* In C++0x, we need this check for direct reference to
11248 reference declarations, which are forbidden by
11249 [8.3.2/5 dcl.ref]. Reference to reference declarations
11250 are only allowed indirectly through typedefs and template
11251 type arguments. Example:
11253 void foo(int & &); // invalid ref-to-ref decl
11255 typedef int & int_ref;
11256 void foo(int_ref &); // valid ref-to-ref decl
11257 */
11261 }
11265 {
11269 /* We will already have complained. */
11271 else
11273 type);
11274 }
11275 else
11278 /* Process a list of type modifier keywords (such as
11279 const or volatile) that were given inside the `*' or `&'. */
11282 {
11283 type
11287 }
11289 /* Apply C++11 attributes to the pointer, and not to the
11290 type pointed to. This is unlike what is done for GNU
11291 attributes above. It is to comply with [dcl.ptr]/1:
11293 [the optional attribute-specifier-seq (7.6.1) appertains
11294 to the pointer and not to the object pointed to]. */
11307 }
11308 }
11310 /* A `constexpr' specifier used in an object declaration declares
11311 the object as `const'. */
11313 {
11314 /* DR1688 says that a `constexpr' specifier in combination with
11315 `volatile' is valid. */
11318 {
11321 }
11322 }
11328 {
11330 unqualified_id);
11332 }
11334 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
11335 qualified with a class-name, turn it into a METHOD_TYPE, unless
11336 we know that the function is static. We take advantage of this
11337 opportunity to do other processing that pertains to entities
11338 explicitly declared to be class members. Note that if DECLARATOR
11339 is non-NULL, we know it is a cdk_id declarator; otherwise, we
11340 would not have exited the loop above. */
11345 {
11351 {
11353 {
11357 }
11358 else
11362 }
11364 can skip the following checks. */
11367 qualifying type must certainly be complete. */
11368 funcdef_flag
11369 /* A friend declaration of "T::f" is OK, even if
11370 "T" is a template parameter. But, if this
11371 function is not a friend, the qualifying type
11372 must be a class. */
11374 /* For a declaration, the type need not be
11375 complete, if either it is dependent (since there
11376 is no meaningful definition of complete in that
11377 case) or the qualifying class is currently being
11378 defined. */
11381 /* Check that the qualifying type is complete. */
11385 {
11388 {
11396 }
11397 }
11399 {
11403 }
11404 }
11409 /* Now TYPE has the actual type. */
11412 {
11415 else
11417 }
11423 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
11424 a declarator-id appertains to the entity that is declared. */
11427 /* Handle parameter packs. */
11429 {
11431 /* Turn the type into a pack expansion.*/
11433 else
11435 }
11438 && !processing_template_decl
11440 {
11443 else
11446 }
11449 {
11450 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
11451 in the declaration of a constructor or conversion function within
11452 a class definition. */
11459 else
11461 "only declarations of constructors and conversion operators "
11464 }
11467 {
11469 {
11472 }
11474 {
11477 }
11480 {
11483 }
11485 {
11488 }
11490 {
11493 }
11495 {
11499 }
11500 }
11502 /* If this is declaring a typedef name, return a TYPE_DECL. */
11504 {
11505 tree decl;
11507 /* This declaration:
11509 typedef void f(int) const;
11511 declares a function type which is not a member of any
11512 particular class, but which is cv-qualified; for
11513 example "f S::*" declares a pointer to a const-qualified
11514 member function of S. We record the cv-qualification in the
11515 function type. */
11517 {
11520 /* We have now dealt with these qualifiers. */
11523 }
11526 {
11529 }
11536 else
11542 }
11545 {
11549 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
11551 /* The TYPE_DECL is "abstract" because there will be
11552 clones of this constructor/destructor, and there will
11553 be copies of this TYPE_DECL generated in those
11554 clones. The decloning optimization (for space) may
11555 revert this subsequently if it determines that
11556 the clones should share a common implementation. */
11558 }
11563 unqualified_id);
11565 /* If the user declares "typedef struct {...} foo" then the
11566 struct will have an anonymous name. Fill that name in now.
11567 Nothing can refer to it, so nothing needs know about the name
11568 change. */
11570 && unqualified_id
11588 /* Acknowledge that this was written:
11589 `using analias = atype;'. */
11593 }
11595 /* Detect the case of an array type of unspecified size
11596 which came, as such, direct from a typedef name.
11597 We must copy the type, so that the array's domain can be
11598 individually set by the object's initializer. */
11605 /* Detect where we're using a typedef of function type to declare a
11606 function. PARMS will not be set, so we must create it now. */
11609 {
11611 tree args;
11616 {
11622 }
11627 {
11628 /* The qualifiers on the function type become the qualifiers on
11629 the non-static member function. */
11633 }
11634 }
11636 /* If this is a type name (such as, in a cast or sizeof),
11637 compute the type and return it now. */
11640 {
11641 /* Note that here we don't care about type_quals. */
11643 /* Special case: "friend class foo" looks like a TYPENAME context. */
11645 {
11647 {
11650 }
11653 {
11654 /* Don't allow friend declaration without a class-key. */
11661 else
11664 type);
11665 }
11667 /* Only try to do this stuff if we didn't already give up. */
11669 {
11670 /* A friendly class? */
11674 else
11676 type);
11679 }
11680 }
11682 {
11689 /* Core issue #547: need to allow this in template type args.
11690 Allow it in general in C++11 for alias-declarations. */
11694 else
11696 }
11702 }
11706 && ! bitfield
11708 {
11711 }
11714 {
11715 /* Only functions may be declared using an operator-function-id. */
11717 {
11720 }
11725 type);
11726 }
11728 /* We don't check parameter types here because we can emit a better
11729 error message later. */
11731 {
11735 }
11737 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
11738 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
11741 {
11747 {
11750 else
11753 }
11755 /* A parameter declared as an array of T is really a pointer to T.
11756 One declared as a function is really a pointer to a function.
11757 One declared as a member is really a pointer to member. */
11760 {
11761 /* Transfer const-ness of array into that of type pointed to. */
11765 }
11768 }
11773 {
11779 }
11781 {
11785 {
11792 }
11794 {
11797 {
11803 else
11807 }
11809 /* The C99 flexible array extension. */
11812 {
11816 {
11819 }
11820 else
11821 {
11822 /* Array is a flexible member. */
11824 /* Do not warn on flexible array members in system
11829 else
11833 /* Flexible array member has a null domain. */
11835 }
11836 }
11839 {
11840 /* Happens when declaring arrays of sizes which
11841 are error_mark_node, for example. */
11843 }
11845 {
11846 /* Something like struct S { int N::j; }; */
11849 }
11852 {
11854 tree function_context;
11857 {
11858 /* This should never happen in pure C++ (the check
11859 could be an assert). It could happen in
11860 Objective-C++ if someone writes invalid code that
11861 uses a function declaration for an instance
11862 variable or property (instance variables and
11863 properties are parsed as FIELD_DECLs, but they are
11864 part of an Objective-C class, not a C++ class).
11865 That code is invalid and is caught by this
11866 check. */
11868 {
11870 unqualified_id);
11872 }
11874 /* ``A union may [ ... ] not [ have ] virtual functions.''
11875 ARM 9.5 */
11877 {
11879 unqualified_id);
11881 }
11886 {
11890 }
11891 }
11893 /* Check that the name used for a destructor makes sense. */
11895 {
11899 {
11904 }
11907 {
11911 }
11913 {
11916 }
11918 {
11921 }
11922 }
11924 {
11929 }
11932 {
11935 }
11937 {
11940 }
11943 {
11946 {
11952 }
11953 }
11955 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
11967 parms,
11968 unqualified_id,
11969 reqs,
11979 #if 0
11980 /* This clobbers the attrs stored in `decl' from `attrlist'. */
11981 /* The decl and setting of decl_attr is also turned off. */
11983 #endif
11985 /* [class.conv.ctor]
11987 A constructor declared without the function-specifier
11988 explicit that can be called with a single parameter
11989 specifies a conversion from the type of its first
11990 parameter to the type of its class. Such a constructor
11991 is called a converting constructor. */
11994 }
11999 {
12002 {
12004 {
12008 }
12009 else
12014 }
12015 }
12016 else
12017 {
12019 {
12023 }
12025 }
12028 {
12029 /* Friends are treated specially. */
12033 {
12035 {
12036 decl = check_explicit_specialization
12041 }
12045 funcdef_flag);
12047 }
12048 else
12050 }
12052 /* Structure field. It may not be a function, except for C++. */
12055 {
12057 {
12058 /* C++ allows static class members. All other work
12059 for this is done by grokfield. */
12067 unqualified_id);
12069 {
12073 }
12080 /* Even if there is an in-class initialization, DECL
12081 is considered undefined until an out-of-class
12082 definition is provided, unless this is an inline
12083 variable. */
12087 {
12093 }
12094 }
12095 else
12096 {
12099 unqualified_id);
12101 {
12103 unqualified_id);
12105 }
12113 {
12116 }
12119 {
12120 /* An attempt is being made to initialize a non-static
12121 member. This is new in C++11. */
12124 /* If this has been parsed with static storage class, but
12125 errors forced staticp to be cleared, ensure NSDMI is
12126 not present. */
12129 }
12130 }
12136 }
12137 }
12140 {
12141 tree original_name;
12149 else
12151 // FIXME:gcc_assert (original_name == dname);
12158 {
12161 name);
12162 else
12164 name);
12165 }
12169 /* Function declaration not at top level.
12170 Storage classes other than `extern' are not allowed
12171 and `extern' makes no difference. */
12176 {
12179 "%<static%> specifier invalid for function %qs "
12181 else
12183 "%<inline%> specifier invalid for function %qs "
12185 }
12188 {
12190 {
12193 }
12196 {
12201 }
12202 }
12204 /* Record whether the function is public. */
12214 publicp,
12217 sfk,
12218 funcdef_flag,
12227 {
12230 /* Don't allow a static member function in a class, and forbid
12231 declaring main to be static. */
12233 {
12237 }
12239 {
12240 /* 7.1.1: There can be no static function declarations within a
12241 block. */
12244 }
12247 {
12250 }
12251 }
12252 }
12253 else
12254 {
12255 /* It's a variable. */
12257 /* An uninitialized decl with `extern' is a reference. */
12259 declspecs,
12260 initialized,
12261 type_quals,
12262 inlinep,
12263 concept_p,
12264 template_count,
12274 {
12277 {
12282 }
12284 {
12287 }
12289 {
12291 "cannot explicitly declare member %q#D to have "
12294 }
12295 }
12297 {
12299 decl);
12301 }
12306 {
12311 }
12312 }
12317 {
12321 }
12324 {
12326 {
12327 /* It's common practice (and completely valid) to have a const
12328 be initialized and declared extern. */
12331 }
12332 else
12333 {
12336 }
12337 }
12339 /* Record `register' declaration for warnings on &
12340 and in case doing stupid register allocation. */
12343 {
12345 /* Warn about register storage specifiers on PARM_DECLs. */
12347 {
12350 "ISO C++17 does not allow %<register%> storage "
12352 else
12355 }
12356 }
12362 /* Set constexpr flag on vars (functions got it in grokfndecl). */
12366 /* Record constancy and volatility on the DECL itself . There's
12367 no need to do this when processing a template; we'll do this
12368 for the instantiated declaration based on the type of DECL. */
12373 }
12374 }
12375 \f
12376 /* Subroutine of start_function. Ensure that each of the parameter
12377 types (as listed in PARMS) is complete, as is required for a
12378 function definition. */
12380 static void
12382 {
12384 {
12389 {
12395 }
12396 else
12397 /* grokparms or complete_type_or_else will have already issued
12398 an error. */
12400 }
12401 }
12403 /* Returns nonzero if T is a local variable. */
12405 int
12407 {
12409 /* A VAR_DECL with a context that is a _TYPE is a static data
12410 member. */
12412 /* Any other non-local variable must be at namespace scope. */
12418 }
12420 /* Like local_variable_p, but suitable for use as a tree-walking
12421 function. */
12423 static tree
12426 {
12434 }
12436 /* Check that ARG, which is a default-argument expression for a
12437 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
12438 something goes wrong. DECL may also be a _TYPE node, rather than a
12439 DECL, if there is no DECL available. */
12441 tree
12443 {
12444 tree var;
12445 tree decl_type;
12448 /* We get a DEFAULT_ARG when looking at an in-class declaration
12449 with a default argument. Ignore the argument for now; we'll
12450 deal with it after the class is complete. */
12454 {
12457 }
12458 else
12465 /* Something already went wrong. There's no need to check
12466 further. */
12469 /* [dcl.fct.default]
12471 A default argument expression is implicitly converted to the
12472 parameter type. */
12475 LOOKUP_IMPLICIT);
12478 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
12479 the call sites. */
12484 /* [dcl.fct.default]
12486 Local variables shall not be used in default argument
12487 expressions.
12489 The keyword `this' shall not be used in a default argument of a
12490 member function. */
12493 {
12495 {
12499 else
12501 }
12503 }
12505 /* All is well. */
12507 }
12509 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
12511 static tree
12513 {
12518 {
12521 else
12523 }
12525 /* Do warn about using typedefs to a deprecated class. */
12537 return type_is_deprecated
12541 }
12543 /* Decode the list of parameter types for a function type.
12544 Given the list of things declared inside the parens,
12545 return a list of types.
12547 If this parameter does not end with an ellipsis, we append
12548 void_list_node.
12550 *PARMS is set to the chain of PARM_DECLs created. */
12552 tree
12554 {
12557 tree parm;
12561 {
12574 {
12576 && !init
12579 /* DR 577: A parameter list consisting of a single
12580 unnamed parameter of non-dependent type 'void'. */
12584 "invalid use of cv-qualified type %qT in "
12586 else
12588 "invalid use of type %<void%> in parameter "
12590 /* It's not a good idea to actually create parameters of
12591 type `void'; other parts of the compiler assume that a
12592 void type terminates the parameter list. */
12595 }
12598 {
12600 {
12604 }
12606 /* Top-level qualifiers on the parameters are
12607 ignored for function types. */
12610 {
12614 }
12618 {
12619 /* Before C++17 DR 393:
12620 [dcl.fct]/6, parameter types cannot contain pointers
12621 (references) to arrays of unknown bound. */
12626 {
12634 }
12637 ptr
12643 }
12649 }
12654 }
12662 }
12664 \f
12665 /* D is a constructor or overloaded `operator='.
12667 Let T be the class in which D is declared. Then, this function
12668 returns:
12670 -1 if D's is an ill-formed constructor or copy assignment operator
12671 whose first parameter is of type `T'.
12672 0 if D is not a copy constructor or copy assignment
12673 operator.
12674 1 if D is a copy constructor or copy assignment operator whose
12675 first parameter is a reference to non-const qualified T.
12676 2 if D is a copy constructor or copy assignment operator whose
12677 first parameter is a reference to const qualified T.
12679 This function can be used as a predicate. Positive values indicate
12680 a copy constructor and nonzero values indicate a copy assignment
12681 operator. */
12683 int
12685 {
12686 tree args;
12687 tree arg_type;
12695 /* Instantiations of template member functions are never copy
12696 functions. Note that member functions of templated classes are
12697 represented as template functions internally, and we must
12698 accept those as copy functions. */
12710 {
12711 /* Pass by value copy assignment operator. */
12713 }
12717 {
12720 }
12721 else
12727 /* There are more non-optional args. */
12731 }
12733 /* D is a constructor or overloaded `operator='.
12735 Let T be the class in which D is declared. Then, this function
12736 returns true when D is a move constructor or move assignment
12737 operator, false otherwise. */
12739 bool
12741 {
12745 /* There are no move constructors if we are in C++98 mode. */
12751 /* Instantiations of template member functions are never move
12752 functions. Note that member functions of templated classes are
12753 represented as template functions internally, and we must
12754 accept those as move functions. */
12758 }
12760 /* D is a constructor or overloaded `operator='.
12762 Then, this function returns true when D has the same signature as a move
12763 constructor or move assignment operator (because either it is such a
12764 ctor/op= or it is a template specialization with the same signature),
12765 false otherwise. */
12767 bool
12769 {
12770 tree args;
12771 tree arg_type;
12791 /* There are more non-optional args. */
12795 }
12797 /* Remember any special properties of member function DECL. */
12799 void
12801 {
12802 tree class_type;
12809 {
12816 {
12817 /* [class.copy]
12819 A non-template constructor for class X is a copy
12820 constructor if its first parameter is of type X&, const
12821 X&, volatile X& or const volatile X&, and either there
12822 are no other parameters or else all other parameters have
12823 default arguments. */
12829 }
12840 }
12842 {
12843 /* [class.copy]
12845 A non-template assignment operator for class X is a copy
12846 assignment operator if its parameter is of type X, X&, const
12847 X&, volatile X& or const volatile X&. */
12852 {
12858 }
12861 }
12865 /* Destructors are handled in check_methods. */
12866 }
12868 /* Check a constructor DECL has the correct form. Complains
12869 if the class has a constructor of the form X(X). */
12871 bool
12873 {
12877 {
12878 /* [class.copy]
12880 A declaration of a constructor for a class X is ill-formed if
12881 its first parameter is of type (optionally cv-qualified) X
12882 and either there are no other parameters or else all other
12883 parameters have default arguments.
12885 We *don't* complain about member template instantiations that
12886 have this form, though; they can occur as we try to decide
12887 what constructor to use during overload resolution. Since
12888 overload resolution will never prefer such a constructor to
12889 the non-template copy constructor (which is either explicitly
12890 or implicitly defined), there's no need to worry about their
12891 existence. Theoretically, they should never even be
12892 instantiated, but that's hard to forestall. */
12896 }
12899 }
12901 /* An operator with this code is unary, but can also be binary. */
12903 static bool
12905 {
12912 }
12914 /* An operator with this name can only be unary. */
12916 static bool
12918 {
12923 }
12925 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
12926 errors are issued for invalid declarations. */
12928 bool
12930 {
12932 tree argtype;
12938 tree class_type;
12940 /* Count the number of arguments and check for ellipsis. */
12953 else
12954 {
12955 /* It'd be nice to hang something else of the identifier to
12956 find CODE more directly. */
12962 ;
12963 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, KIND) \
12964 else if (assign_op == (KIND == cik_assign_op) \
12965 && oni[int (CODE)].identifier == name) \
12966 operator_code = (CODE);
12968 #undef DEF_OPERATOR
12969 else
12971 }
12978 {
12997 }
12999 /* [basic.std.dynamic.allocation]/1:
13001 A program is ill-formed if an allocation function is declared
13002 in a namespace scope other than global scope or declared static
13003 in global scope.
13005 The same also holds true for deallocation functions. */
13008 {
13010 {
13012 {
13015 }
13017 {
13020 }
13021 }
13022 }
13025 {
13028 }
13031 else
13032 {
13033 /* An operator function must either be a non-static member function
13034 or have at least one parameter of a class, a reference to a class,
13035 an enumeration, or a reference to an enumeration. 13.4.0.6 */
13037 {
13043 {
13046 }
13047 else
13048 {
13049 tree p;
13052 {
13056 }
13059 {
13064 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
13065 because these checks are performed even on
13066 template functions. */
13070 }
13073 {
13078 }
13079 }
13080 }
13082 /* There are no restrictions on the arguments to an overloaded
13083 "operator ()". */
13087 /* Warn about conversion operators that will never be used. */
13090 && warn_conversion
13091 /* Warn only declaring the function; there is no need to
13092 warn again about out-of-class definitions. */
13094 {
13103 ref
13109 {
13112 ref
13117 /* Don't force t to be complete here. */
13122 ref
13127 }
13129 }
13132 {
13133 /* 13.4.0.3 */
13136 }
13138 {
13141 }
13143 {
13145 /* We pick the one-argument operator codes by default, so
13146 we don't have to change anything. */
13147 ;
13149 {
13150 /* If we thought this was a unary operator, we now know
13151 it to be a binary operator. */
13153 {
13180 }
13186 && ! processing_template_decl
13188 {
13191 decl);
13192 else
13196 }
13197 }
13198 else
13199 {
13202 else
13205 }
13207 /* More Effective C++ rule 6. */
13213 {
13221 {
13224 arg))
13227 }
13228 else
13229 {
13232 }
13233 }
13234 }
13236 {
13238 {
13241 else
13244 }
13245 }
13247 {
13249 {
13252 else
13255 }
13257 /* More Effective C++ rule 7. */
13263 decl);
13264 }
13266 /* Effective C++ rule 23. */
13278 /* [over.oper]/8 */
13282 {
13286 {
13288 decl);
13289 }
13290 else
13291 {
13294 }
13295 }
13296 }
13298 }
13299 \f
13300 /* Return a string giving the keyword associate with CODE. */
13304 {
13306 {
13319 }
13320 }
13322 /* Name lookup in an elaborated-type-specifier (after the keyword
13323 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
13324 elaborated-type-specifier is invalid, issue a diagnostic and return
13325 error_mark_node; otherwise, return the *_TYPE to which it referred.
13326 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
13328 tree
13330 tree decl,
13332 {
13333 tree type;
13335 /* In the case of:
13337 struct S { struct S *p; };
13339 name lookup will find the TYPE_DECL for the implicit "S::S"
13340 typedef. Adjust for that here. */
13346 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
13347 is false for this case as well. */
13349 {
13353 }
13354 /* Accept template template parameters. */
13358 ;
13359 /* [dcl.type.elab]
13361 If the identifier resolves to a typedef-name or the
13362 simple-template-id resolves to an alias template
13363 specialization, the elaborated-type-specifier is ill-formed.
13365 In other words, the only legitimate declaration to use in the
13366 elaborated type specifier is the implicit typedef created when
13367 the type is declared. */
13371 {
13375 else
13380 }
13385 {
13389 }
13392 {
13396 }
13400 {
13401 /* If a class template appears as elaborated type specifier
13402 without a template header such as:
13404 template <class T> class C {};
13405 void f(class C); // No template header here
13407 then the required template argument is missing. */
13412 }
13415 }
13417 /* Lookup NAME in elaborate type specifier in scope according to
13418 SCOPE and issue diagnostics if necessary.
13419 Return *_TYPE node upon success, NULL_TREE when the NAME is not
13420 found, and ERROR_MARK_NODE for type error. */
13422 static tree
13425 {
13426 tree t;
13427 tree decl;
13429 {
13430 /* First try ordinary name lookup, ignoring hidden class name
13431 injected via friend declaration. */
13434 /* If that fails, the name will be placed in the smallest
13435 non-class, non-function-prototype scope according to 3.3.1/5.
13436 We may already have a hidden name declared as friend in this
13437 scope. So lookup again but not ignoring hidden names.
13438 If we find one, that name will be made visible rather than
13439 creating a new tag. */
13442 }
13443 else
13448 /* If scope is ts_current we're defining a class, so ignore a
13449 template template parameter. */
13455 {
13456 /* Look for invalid nested type:
13457 class C {
13458 class C {};
13459 }; */
13461 {
13464 decl);
13466 }
13468 /* Two cases we need to consider when deciding if a class
13469 template is allowed as an elaborated type specifier:
13470 1. It is a self reference to its own class.
13471 2. It comes with a template header.
13473 For example:
13475 template <class T> class C {
13476 class C *c1; // DECL_SELF_REFERENCE_P is true
13477 class D;
13478 };
13479 template <class U> class C; // template_header_p is true
13480 template <class T> class C<T>::D {
13481 class C *c2; // DECL_SELF_REFERENCE_P is true
13482 }; */
13485 decl,
13486 template_header_p
13491 {
13500 }
13503 }
13505 {
13509 }
13510 else
13512 }
13514 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
13515 Define the tag as a forward-reference if it is not defined.
13517 If a declaration is given, process it here, and report an error if
13518 multiple declarations are not identical.
13520 SCOPE is TS_CURRENT when this is also a definition. Only look in
13521 the current frame for the name (since C++ allows new names in any
13522 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
13523 declaration. Only look beginning from the current scope outward up
13524 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
13526 TEMPLATE_HEADER_P is true when this declaration is preceded by
13527 a set of template parameters. */
13529 static tree
13532 {
13539 {
13552 }
13554 /* In case of anonymous name, xref_tag is only called to
13555 make type node and push name. Name lookup is not required. */
13566 {
13570 /* Since SCOPE is not TS_CURRENT, we are not looking at a
13571 definition of this tag. Since, in addition, we are currently
13572 processing a (member) template declaration of a template
13573 class, we must be very careful; consider:
13575 template <class X>
13576 struct S1
13578 template <class U>
13579 struct S2
13580 { template <class V>
13581 friend struct S1; };
13583 Here, the S2::S1 declaration should not be confused with the
13584 outer declaration. In particular, the inner version should
13585 have a template parameter of level 2, not level 1. This
13586 would be particularly important if the member declaration
13587 were instead:
13589 template <class V = U> friend struct S1;
13591 say, when we should tsubst into `U' when instantiating
13592 S2. On the other hand, when presented with:
13594 template <class T>
13595 struct S1 {
13596 template <class U>
13597 struct S2 {};
13598 template <class U>
13599 friend struct S2;
13600 };
13602 we must find the inner binding eventually. We
13603 accomplish this by making sure that the new type we
13604 create to represent this declaration has the right
13605 TYPE_CONTEXT. */
13608 }
13611 {
13612 /* If no such tag is yet defined, create a forward-reference node
13613 and record it as the "definition".
13614 When a real declaration of this type is found,
13615 the forward-reference will be altered into a real type. */
13617 {
13620 }
13621 else
13622 {
13626 /* Mark it as a lambda type. */
13629 }
13630 }
13631 else
13632 {
13634 {
13635 /* Check that we aren't trying to overload a class with different
13636 constraints. */
13639 {
13642 }
13645 }
13649 {
13653 }
13655 /* Make injected friend class visible. */
13657 {
13664 {
13668 }
13669 }
13670 }
13673 }
13675 /* Wrapper for xref_tag_1. */
13677 tree
13680 {
13681 tree ret;
13687 }
13690 tree
13692 {
13697 else
13704 }
13706 /* Create the binfo hierarchy for REF with (possibly NULL) base list
13707 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
13708 access_* node, and the TREE_VALUE is the type of the base-class.
13709 Non-NULL TREE_TYPE indicates virtual inheritance. */
13711 void
13713 {
13720 tree default_access;
13726 /* The base of a derived class is private by default, all others are
13727 public. */
13732 /* First, make sure that any templates in base-classes are
13733 instantiated. This ensures that if we call ourselves recursively
13734 we do not get confused about which classes are marked and which
13735 are not. */
13738 {
13741 /* The dependent_type_p call below should really be dependent_scope_p
13742 so that we give a hard error about using an incomplete type as a
13743 base, but we allow it with a pedwarn for backward
13744 compatibility. */
13750 /* An incomplete type. Remove it from the list. */
13752 else
13753 {
13754 max_bases++;
13756 max_dvbases++;
13760 }
13761 }
13766 /* The binfo slot should be empty, unless this is an (ill-formed)
13767 redefinition. */
13778 /* Apply base-class info set up to the variants of this type. */
13782 {
13784 /* A C++98 POD cannot have base classes. */
13789 }
13796 {
13797 /* An aggregate can't have virtual base classes. */
13805 }
13808 {
13816 /* Before C++17, an aggregate cannot have base classes. In C++17, an
13817 aggregate can't have virtual, private, or protected base classes. */
13828 {
13830 basetype);
13832 }
13836 {
13838 /* The original basetype could have been a typedef'd type. */
13841 /* Inherit flags from the base. */
13852 }
13854 /* We must do this test after we've seen through a typedef
13855 type. */
13857 {
13860 else
13863 }
13866 /* Regenerate the pack expansion for the bases. */
13880 dropped_base:
13881 /* Update max_vbases to reflect the reality that we are dropping
13882 this base: if it reaches zero we want to undo the vec_alloc
13883 above to avoid inconsistencies during error-recovery: eg, in
13884 build_special_member_call, CLASSTYPE_VBASECLASSES non null
13885 and vtt null (c++/27952). */
13887 max_vbases--;
13889 max_vbases
13891 }
13898 /* If we didn't get max_vbases vbases, we must have shared at
13899 least one of them, and are therefore diamond shaped. */
13902 /* Unmark all the types. */
13907 /* Now see if we have a repeated base type. */
13909 {
13912 {
13914 {
13917 }
13919 }
13924 else
13926 }
13927 }
13929 \f
13930 /* Copies the enum-related properties from type SRC to type DST.
13931 Used with the underlying type of an enum and the enum itself. */
13932 static void
13934 {
13935 tree t;
13937 {
13947 else
13951 }
13952 }
13954 /* Begin compiling the definition of an enumeration type.
13955 NAME is its name,
13957 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
13959 UNDERLYING_TYPE is the type that will be used as the storage for
13960 the enumeration type. This should be NULL_TREE if no storage type
13961 was specified.
13963 ATTRIBUTES are any attributes specified after the enum-key.
13965 SCOPED_ENUM_P is true if this is a scoped enumeration type.
13967 if IS_NEW is not NULL, gets TRUE iff a new type is created.
13969 Returns the type object, as yet incomplete.
13970 Also records info about it so that build_enumerator
13971 may be used to declare the individual values as they are read. */
13973 tree
13976 {
13982 /* [C++0x dcl.enum]p5:
13984 If not explicitly specified, the underlying type of a scoped
13985 enumeration type is int. */
13992 /* If this is the real definition for a previous forward reference,
13993 fill in the contents in the same object that used to be the
13994 forward reference. */
14000 /* In case of a template_decl, the only check that should be deferred
14001 to instantiation time is the comparison of underlying types. */
14003 {
14005 {
14011 }
14013 {
14019 }
14025 {
14031 }
14032 }
14036 {
14037 /* In case of error, make a dummy enum to allow parsing to
14038 continue. */
14040 {
14043 }
14045 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
14046 of an opaque enum, or an opaque enum of an already defined
14047 enumeration (C++0x only).
14048 In any other case, it'll be NULL_TREE. */
14050 {
14053 }
14056 /* Do not push the decl more than once, unless we need to
14057 compare underlying types at instantiation time */
14060 || (underlying_type
14064 {
14068 /* std::byte aliases anything. */
14073 }
14074 else
14081 /* The enum is considered opaque until the opening '{' of the
14082 enumerator list. */
14085 }
14092 {
14094 /* We already checked that it matches, don't change it to a different
14097 {
14100 }
14103 else
14106 }
14108 /* If into a template class, the returned enum is always the first
14109 declaration (opaque or not) seen. This way all the references to
14110 this type will be to the same declaration. The following ones are used
14111 only to check for definition errors. */
14114 else
14116 }
14118 /* After processing and defining all the values of an enumeration type,
14119 install their decls in the enumeration type.
14120 ENUMTYPE is the type object. */
14122 void
14124 {
14125 tree values;
14126 tree underlying_type;
14127 tree decl;
14128 tree value;
14130 tree t;
14132 bool fixed_underlying_type_p
14135 /* We built up the VALUES in reverse order. */
14138 /* For an enum defined in a template, just set the type of the values;
14139 all further processing is postponed until the template is
14140 instantiated. We need to set the type so that tsubst of a CONST_DECL
14141 works. */
14143 {
14145 values;
14149 }
14151 /* Determine the minimum and maximum values of the enumerators. */
14153 {
14157 values;
14159 {
14162 /* [dcl.enum]: Following the closing brace of an enum-specifier,
14163 each enumerator has the type of its enumeration. Prior to the
14164 closing brace, the type of each enumerator is the type of its
14165 initializing value. */
14168 /* Update the minimum and maximum values, if appropriate. */
14172 /* Figure out what the minimum and maximum values of the
14173 enumerators are. */
14180 }
14181 }
14182 else
14183 /* [dcl.enum]
14185 If the enumerator-list is empty, the underlying type is as if
14186 the enumeration had a single enumerator with value 0. */
14190 {
14191 /* Compute the number of bits require to represent all values of the
14192 enumeration. We must do this before the type of MINNODE and
14193 MAXNODE are transformed, since tree_int_cst_min_precision relies
14194 on the TREE_TYPE of the value it is passed. */
14202 /* Determine the underlying type of the enumeration.
14204 [dcl.enum]
14206 The underlying type of an enumeration is an integral type that
14207 can represent all the enumerator values defined in the
14208 enumeration. It is implementation-defined which integral type is
14209 used as the underlying type for an enumeration except that the
14210 underlying type shall not be larger than int unless the value of
14211 an enumerator cannot fit in an int or unsigned int.
14213 We use "int" or an "unsigned int" as the underlying type, even if
14214 a smaller integral type would work, unless the user has
14215 explicitly requested that we use the smallest possible type. The
14216 user can request that for all enumerations with a command line
14217 flag, or for just one enumeration with an attribute. */
14219 use_short_enum = flag_short_enums
14222 /* If the precision of the type was specified with an attribute and it
14223 was too small, give an error. Otherwise, use it. */
14225 {
14228 else
14229 {
14232 }
14233 }
14237 itk++)
14238 {
14244 }
14246 {
14247 /* DR 377
14249 IF no integral type can represent all the enumerator values, the
14250 enumeration is ill-formed. */
14255 }
14257 /* [dcl.enum]
14259 The value of sizeof() applied to an enumeration type, an object
14260 of an enumeration type, or an enumerator, is the value of sizeof()
14261 applied to the underlying type. */
14264 /* Compute the minimum and maximum values for the type.
14266 [dcl.enum]
14268 For an enumeration where emin is the smallest enumerator and emax
14269 is the largest, the values of the enumeration are the values of the
14270 underlying type in the range bmin to bmax, where bmin and bmax are,
14271 respectively, the smallest and largest values of the smallest bit-
14272 field that can store emin and emax. */
14274 /* The middle-end currently assumes that types with TYPE_PRECISION
14275 narrower than their underlying type are suitably zero or sign
14276 extended to fill their mode. Similarly, it assumes that the front
14277 end assures that a value of a particular type must be within
14278 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
14280 We used to set these fields based on bmin and bmax, but that led
14281 to invalid assumptions like optimizing away bounds checking. So
14282 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
14283 TYPE_MAX_VALUE to the values for the mode above and only restrict
14284 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
14288 set_min_and_max_values_for_integral_type
14291 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
14294 }
14295 else
14298 /* Convert each of the enumerators to the type of the underlying
14299 type of the enumeration. */
14301 {
14302 location_t saved_location;
14308 /* If the enumeration type has a fixed underlying type, we
14309 already checked all of the enumerator values. */
14311 else
14314 tf_warning_or_error);
14317 /* Do not clobber shared ints. */
14319 {
14323 }
14325 }
14327 /* Fix up all variant types of this enum type. */
14334 {
14336 /* TYPE_FIELDS needs fixup. */
14338 }
14340 /* Finish debugging output for this type. */
14343 /* Each enumerator now has the type of its enumeration. Clear the cache
14344 so that this change in types doesn't confuse us later on. */
14346 }
14348 /* Finishes the enum type. This is called only the first time an
14349 enumeration is seen, be it opaque or odinary.
14350 ENUMTYPE is the type object. */
14352 void
14354 {
14356 {
14360 }
14362 /* If this is a forward declaration, there should not be any variants,
14363 though we can get a variant in the middle of an enum-specifier with
14364 wacky code like 'enum E { e = sizeof(const E*) };' */
14368 }
14370 /* Build and install a CONST_DECL for an enumeration constant of the
14371 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
14372 Apply ATTRIBUTES if available. LOC is the location of NAME.
14373 Assignment of sequential values by default is handled here. */
14375 void
14377 location_t loc)
14378 {
14379 tree decl;
14380 tree context;
14381 tree type;
14383 /* scalar_constant_value will pull out this expression, so make sure
14384 it's folded as appropriate. */
14388 /* If the VALUE was erroneous, pretend it wasn't there; that will
14389 result in the enum being assigned the next value in sequence. */
14393 /* Remove no-op casts from the value. */
14398 {
14399 /* Validate and default VALUE. */
14401 {
14403 {
14408 }
14411 value = perform_implicit_conversion_flags
14419 {
14422 {
14426 }
14427 else
14428 {
14432 {
14436 }
14437 }
14438 }
14439 }
14441 /* Default based on previous value. */
14443 {
14445 {
14446 tree prev_value;
14449 /* C++03 7.2/4: If no initializer is specified for the first
14450 enumerator, the type is an unspecified integral
14451 type. Otherwise the type is the same as the type of the
14452 initializing value of the preceding enumerator unless the
14453 incremented value is not representable in that type, in
14454 which case the type is an unspecified integral type
14455 sufficient to contain the incremented value. */
14459 else
14460 {
14466 {
14469 {
14472 {
14478 }
14485 }
14488 else
14490 }
14493 {
14496 }
14497 }
14498 }
14499 else
14501 }
14503 /* Remove no-op casts from the value. */
14506 /* If the underlying type of the enum is fixed, check whether
14507 the enumerator values fits in the underlying type. If it
14508 does not fit, the program is ill-formed [C++0x dcl.enum]. */
14510 && value
14512 {
14517 /* Convert the value to the appropriate type. */
14519 }
14520 }
14522 /* C++ associates enums with global, function, or class declarations. */
14525 /* Build the actual enumeration constant. Note that the enumeration
14526 constants have the underlying type of the enum (if it is fixed)
14527 or the type of their initializer (if the underlying type of the
14528 enum is not fixed):
14530 [ C++0x dcl.enum ]
14532 If the underlying type is fixed, the type of each enumerator
14533 prior to the closing brace is the underlying type; if the
14534 initializing value of an enumerator cannot be represented by
14535 the underlying type, the program is ill-formed. If the
14536 underlying type is not fixed, the type of each enumerator is
14537 the type of its initializing value.
14539 If the underlying type is not fixed, it will be computed by
14540 finish_enum and we will reset the type of this enumerator. Of
14541 course, if we're processing a template, there may be no value. */
14555 {
14556 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
14557 on the TYPE_FIELDS list for `S'. (That's so that you can say
14558 things like `S::i' later.) */
14560 /* The enumerator may be getting declared outside of its enclosing
14561 class, like so:
14563 class S { public: enum E : int; }; enum S::E : int { i = 7; };
14565 For which case we need to make sure that the access of `S::i'
14566 matches the access of `S::E'. */
14572 else
14578 }
14579 else
14582 /* Add this enumeration constant to the list for this type. */
14584 }
14586 /* Look for an enumerator with the given NAME within the enumeration
14587 type ENUMTYPE. This routine is used primarily for qualified name
14588 lookup into an enumerator in C++0x, e.g.,
14590 enum class Color { Red, Green, Blue };
14592 Color color = Color::Red;
14594 Returns the value corresponding to the enumerator, or
14595 NULL_TREE if no such enumerator was found. */
14596 tree
14598 {
14599 tree e;
14604 }
14606 \f
14607 /* We're defining DECL. Make sure that its type is OK. */
14609 static void
14611 {
14615 /* In a function definition, arg types must be complete. */
14622 {
14627 /* Make it return void instead. */
14630 void_type_node,
14632 else
14634 fntype
14637 fntype = (cp_build_type_attribute_variant
14640 }
14641 else
14642 {
14646 }
14647 }
14649 /* True iff FN is an implicitly-defined default constructor. */
14651 static bool
14653 {
14657 }
14659 /* Clobber the contents of *this to let the back end know that the object
14660 storage is dead when we enter the constructor or leave the destructor. */
14662 static tree
14664 {
14665 /* Clobbering an empty base is pointless, and harmful if its one byte
14666 TYPE_SIZE overlays real data. */
14670 /* If we have virtual bases, clobber the whole object, but only if we're in
14671 charge. If we don't have virtual bases, clobber the as-base type so we
14672 don't mess with tail padding. */
14684 {
14687 }
14694 }
14696 /* Create the FUNCTION_DECL for a function definition.
14697 DECLSPECS and DECLARATOR are the parts of the declaration;
14698 they describe the function's name and the type it returns,
14699 but twisted together in a fashion that parallels the syntax of C.
14701 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
14702 DECLARATOR is really the DECL for the function we are about to
14703 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
14704 indicating that the function is an inline defined in-class.
14706 This function creates a binding context for the function body
14707 as well as setting up the FUNCTION_DECL in current_function_decl.
14709 For C++, we must first check whether that datum makes any sense.
14710 For example, "class A local_a(1,2);" means that variable local_a
14711 is an aggregate of type A, which should have a constructor
14712 applied to it with the argument list [1, 2].
14714 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
14715 or may be a BLOCK if the function has been defined previously
14716 in this translation unit. On exit, DECL_INITIAL (decl1) will be
14717 error_mark_node if the function has never been defined, or
14718 a BLOCK if the function has been defined somewhere. */
14720 bool
14722 {
14724 tree fntype;
14725 tree restype;
14728 tree current_function_parms;
14733 /* Sanity check. */
14741 /* ISO C++ 11.4/5. A friend function defined in a class is in
14742 the (lexical) scope of the class in which it is defined. */
14744 {
14747 /* CTYPE could be null here if we're dealing with a template;
14748 for example, `inline friend float foo()' inside a template
14749 will have no CTYPE set. */
14752 else
14754 }
14761 /* Handle gnu_inline attribute. */
14763 {
14768 }
14771 /* This is a constructor, we must ensure that any default args
14772 introduced by this definition are propagated to the clones
14773 now. The clones are used directly in overload resolution. */
14776 /* Sometimes we don't notice that a function is a static member, and
14777 build a METHOD_TYPE for it. Fix that up now. */
14781 /* Set up current_class_type, and enter the scope of the class, if
14782 appropriate. */
14788 /* Now that we have entered the scope of the class, we must restore
14789 the bindings for any template parameters surrounding DECL1, if it
14790 is an inline member template. (Order is important; consider the
14791 case where a template parameter has the same name as a field of
14792 the class.) It is not until after this point that
14793 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
14797 /* Effective C++ rule 15. */
14803 /* Make the init_value nonzero so pushdecl knows this is not tentative.
14804 error_mark_node is replaced below (in poplevel) with the BLOCK. */
14808 /* This function exists in static storage.
14809 (This does not mean `static' in the C sense!) */
14812 /* We must call push_template_decl after current_class_type is set
14813 up. (If we are processing inline definitions after exiting a
14814 class scope, current_class_type will be NULL_TREE until set above
14815 by push_nested_class.) */
14817 {
14820 {
14824 }
14826 }
14828 /* Make sure the parameter and return types are reasonable. When
14829 you declare a function, these types can be incomplete, but they
14830 must be complete when you define the function. */
14833 /* Build the return declaration for the function. */
14837 {
14838 tree resdecl;
14846 }
14848 /* Record the decl so that the function name is defined.
14849 If we already have a decl for this name, and it is a FUNCTION_DECL,
14850 use the old decl. */
14852 {
14853 /* A specialization is not used to guide overload resolution. */
14857 {
14861 /* If something went wrong when registering the declaration,
14862 use DECL1; we have to have a FUNCTION_DECL to use when
14863 parsing the body of the function. */
14864 ;
14865 else
14866 {
14867 /* Otherwise, OLDDECL is either a previous declaration
14868 of the same function or DECL1 itself. */
14875 {
14876 tree context;
14878 /* Check whether DECL1 is in an anonymous
14879 namespace. */
14881 context;
14883 {
14887 }
14891 OPT_Wmissing_declarations,
14893 }
14896 }
14897 }
14898 else
14899 {
14900 /* We need to set the DECL_CONTEXT. */
14903 }
14907 /* If #pragma weak applies, mark the decl appropriately now.
14908 The pragma only applies to global functions. Because
14909 determining whether or not the #pragma applies involves
14910 computing the mangled name for the declaration, we cannot
14911 apply the pragma until after we have merged this declaration
14912 with any previous declarations; if the original declaration
14913 has a linkage specification, that specification applies to
14914 the definition as well, and may affect the mangled name. */
14917 }
14919 /* We are now in the scope of the function being defined. */
14922 /* Save the parm names or decls from this function's declarator
14923 where store_parm_decls will find them. */
14926 /* Let the user know we're compiling this function. */
14931 /* This function may already have been parsed, in which case just
14932 return; our caller will skip over the body without parsing. */
14936 /* Initialize RTL machinery. We cannot do this until
14937 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
14938 even when processing a template; this is how we get
14939 CFUN set up, and our per-function variables initialized.
14940 FIXME factor out the non-RTL stuff. */
14944 /* Initialize the language data structures. Whenever we start
14945 a new function, we destroy temporaries in the usual way. */
14951 {
14954 }
14956 /* Start the statement-tree, start the tree now. */
14959 /* If we are (erroneously) defining a function that we have already
14960 defined before, wipe out what we knew before. */
14965 {
14966 /* We know that this was set up by `grokclassfn'. We do not
14967 wait until `store_parm_decls', since evil parse errors may
14968 never get us to that point. Here we keep the consistency
14969 between `current_class_type' and `current_class_ptr'. */
14975 cp_function_chain->x_current_class_ref
14977 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
14980 /* Constructors and destructors need to know whether they're "in
14981 charge" of initializing virtual base classes. */
14984 {
14987 }
14989 {
14992 }
14993 }
14996 /* Implicitly-defined methods (like the
14997 destructor for a class in which no destructor
14998 is explicitly declared) must not be defined
14999 until their definition is needed. So, we
15000 ignore interface specifications for
15001 compiler-generated functions. */
15007 {
15014 /* This is a function in a local class in an extern inline
15015 or template function. */
15017 }
15018 /* If this function belongs to an interface, it is public.
15019 If it belongs to someone else's interface, it is also external.
15020 This only affects inlines and template instantiations. */
15022 {
15025 {
15029 && ! flag_implement_inlines
15032 /* For WIN32 we also want to put these in linkonce sections. */
15034 }
15035 else
15038 /* If this function is in an interface implemented in this file,
15039 make sure that the back end knows to emit this function
15040 here. */
15043 }
15046 {
15047 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
15048 interface, we will have both finfo->interface_unknown and
15049 finfo->interface_only set. In that case, we don't want to
15050 use the normal heuristics because someone will supply a
15051 #pragma implementation elsewhere, and deducing it here would
15052 produce a conflict. */
15057 }
15058 else
15059 {
15060 /* This is a definition, not a reference.
15061 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
15069 else
15071 }
15073 /* Determine the ELF visibility attribute for the function. We must not
15074 do this before calling "pushdecl", as we must allow "duplicate_decls"
15075 to merge any attributes appropriately. We also need to wait until
15076 linkage is set. */
15090 {
15093 }
15103 /* Clobbering an empty base is harmful if it overlays real data. */
15105 /* We can't clobber safely for an implicitly-defined default constructor
15106 because part of the initialization might happen before we enter the
15107 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
15121 }
15124 /* Like start_preparsed_function, except that instead of a
15125 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
15127 Returns true on success. If the DECLARATOR is not suitable
15128 for a function, we return false, which tells the parser to
15129 skip the entire function. */
15131 bool
15134 tree attrs)
15135 {
15136 tree decl1;
15142 /* If the declarator is not suitable for a function definition,
15143 cause a syntax error. */
15145 {
15148 }
15151 /* main must return int. grokfndecl should have corrected it
15152 (and issued a diagnostic) if the user got it wrong. */
15154 integer_type_node));
15157 }
15158 \f
15159 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
15160 FN. */
15162 static bool
15164 {
15166 && !processing_template_decl
15168 /* We insert the EH_SPEC_BLOCK only in the original
15169 function; then, it is copied automatically to the
15170 clones. */
15172 /* Implicitly-generated constructors and destructors have
15173 exception specifications. However, those specifications
15174 are the union of the possible exceptions specified by the
15175 constructors/destructors for bases and members, so no
15176 unallowed exception will ever reach this function. By
15177 not creating the EH_SPEC_BLOCK we save a little memory,
15178 and we avoid spurious warnings about unreachable
15179 code. */
15181 }
15183 /* Store the parameter declarations into the current function declaration.
15184 This is called after parsing the parameter declarations, before
15185 digesting the body of the function.
15187 Also install to binding contour return value identifier, if any. */
15189 static void
15191 {
15193 tree parm;
15195 /* This is a chain of any other decls that came in among the parm
15196 declarations. If a parm is declared with enum {foo, bar} x;
15197 then CONST_DECLs for foo and bar are put here. */
15201 {
15202 /* This case is when the function was defined with an ANSI prototype.
15203 The parms already have decls, so we need not do anything here
15204 except record them as in effect
15205 and complain if any redundant old-style parm decls were written. */
15208 tree next;
15210 /* Must clear this because it might contain TYPE_DECLs declared
15211 at class level. */
15214 /* If we're doing semantic analysis, then we'll call pushdecl
15215 for each of these. We must do them in reverse order so that
15216 they end in the correct forward order. */
15220 {
15224 else
15225 {
15226 /* If we find an enum constant or a type tag,
15227 put it aside for the moment. */
15230 }
15231 }
15233 /* Get the decls in their original chain order and record in the
15234 function. This is all and only the PARM_DECLs that were
15235 pushed into scope by the loop above. */
15237 }
15238 else
15241 /* Now store the final chain of decls for the arguments
15242 as the decl-chain of the current lexical scope.
15243 Put the enumerators in as well, at the front so that
15244 DECL_ARGUMENTS is not modified. */
15249 }
15251 \f
15252 /* We have finished doing semantic analysis on DECL, but have not yet
15253 generated RTL for its body. Save away our current state, so that
15254 when we want to generate RTL later we know what to do. */
15256 static void
15258 {
15261 /* Save the language-specific per-function data so that we can
15262 get it back when we really expand this function. */
15265 /* Make a copy. */
15270 /* Clear out the bits we don't need. */
15275 }
15278 /* Set the return value of the constructor (if present). */
15280 static void
15282 {
15283 tree val;
15284 tree exprstmt;
15287 {
15288 /* Any return from a constructor will end up here. */
15294 /* Return the address of the object. */
15297 }
15298 }
15300 /* Do all the processing for the beginning of a destructor; set up the
15301 vtable pointers and cleanups for bases and members. */
15303 static void
15305 {
15306 tree compound_stmt;
15308 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
15309 issued an error message. We still want to try to process the
15310 body of the function, but initialize_vtbl_ptrs will crash if
15311 TYPE_BINFO is NULL. */
15313 {
15315 /* Make all virtual function table pointers in non-virtual base
15316 classes point to CURRENT_CLASS_TYPE's virtual function
15317 tables. */
15322 /* Clobbering an empty base is harmful if it overlays real data. */
15326 /* And insert cleanups for our bases and members so that they
15327 will be properly destroyed if we throw. */
15329 }
15330 }
15332 /* At the end of every destructor we generate code to delete the object if
15333 necessary. Do that now. */
15335 static void
15337 {
15338 tree exprstmt;
15340 /* Any return from a destructor will end up here; that way all base
15341 and member cleanups will be run when the function returns. */
15345 {
15346 tree val;
15351 /* Return the address of the object. */
15354 }
15355 }
15357 /* Do the necessary processing for the beginning of a function body, which
15358 in this case includes member-initializers, but not the catch clauses of
15359 a function-try-block. Currently, this means opening a binding level
15360 for the member-initializers (in a ctor), member cleanups (in a dtor),
15361 and capture proxies (in a lambda operator()). */
15363 tree
15365 {
15366 tree stmt;
15373 else
15374 /* Always keep the BLOCK node associated with the outermost pair of
15375 curly braces of a function. These are needed for correct
15376 operation of dwarfout.c. */
15387 }
15389 /* Do the processing for the end of a function body. Currently, this means
15390 closing out the cleanups for fully-constructed bases and members, and in
15391 the case of the destructor, deleting the object if desired. Again, this
15392 is only meaningful for [cd]tors, since they are the only functions where
15393 there is a significant distinction between the main body and any
15394 function catch clauses. Handling, say, main() return semantics here
15395 would be wrong, as flowing off the end of a function catch clause for
15396 main() would also need to return 0. */
15398 void
15400 {
15404 /* Close the block. */
15413 }
15415 /* Given a function, returns the BLOCK corresponding to the outermost level
15416 of curly braces, skipping the artificial block created for constructor
15417 initializers. */
15419 tree
15421 {
15431 }
15433 /* If FNDECL is a class's key method, add the class to the list of
15434 keyed classes that should be emitted. */
15436 static void
15438 {
15442 {
15446 }
15447 }
15449 /* Subroutine of finish_function.
15450 Save the body of constexpr functions for possible
15451 future compile time evaluation. */
15453 static void
15455 {
15461 }
15463 /* Finish up a function declaration and compile that function
15464 all the way to assembler language output. The free the storage
15465 for the function definition. INLINE_P is TRUE if we just
15466 finished processing the body of an in-class inline function
15467 definition. (This processing will have taken place after the
15468 class definition is complete.) */
15470 tree
15472 {
15476 /* When we get some parse errors, we can end up without a
15477 current_function_decl, so cope. */
15490 /* TREE_READONLY (fndecl) = 1;
15491 This caused &foo to be of type ptr-to-const-function
15492 which then got a warning when stored in a ptr-to-function variable. */
15495 /* The current function is being defined, so its DECL_INITIAL should
15496 be set, and unless there's a multiple definition, it should be
15497 error_mark_node. */
15500 /* For a cloned function, we've already got all the code we need;
15501 there's no need to add any extra bits. */
15503 {
15504 /* Make it so that `main' always returns 0 by default. */
15511 current_eh_spec_block);
15512 }
15514 /* If we're saving up tree structure, tie off the function now. */
15522 /* If this function can't throw any exceptions, remember that. */
15525 && !flag_non_call_exceptions
15529 /* This must come after expand_function_end because cleanups might
15530 have declarations (from inline functions) that need to go into
15531 this function's blocks. */
15533 /* If the current binding level isn't the outermost binding level
15534 for this function, either there is a bug, or we have experienced
15535 syntax errors and the statement tree is malformed. */
15537 {
15538 /* Make sure we have already experienced errors. */
15541 /* Throw away the broken statement tree and extra binding
15542 levels. */
15546 {
15549 else
15551 }
15552 }
15555 /* Statements should always be full-expressions at the outermost set
15556 of curly braces for a function. */
15559 /* If there are no return statements in a function with auto return type,
15560 the return type is void. But if the declared type is something like
15561 auto*, this is an error. */
15564 {
15566 {
15569 }
15572 {
15574 current_function_auto_return_pattern);
15577 }
15578 }
15580 // If this is a concept, check that the definition is reasonable.
15584 /* Lambda closure members are implicitly constexpr if possible. */
15588 = ((processing_template_decl
15592 /* Save constexpr function body before it gets munged by
15593 the NRV transformation. */
15596 /* Invoke the pre-genericize plugin before we start munging things. */
15600 /* Perform delayed folding before NRV transformation. */
15604 /* Set up the named return value optimization, if we can. Candidate
15605 variables are selected in check_return_expr. */
15607 {
15609 tree outer;
15612 /* This is only worth doing for fns that return in memory--and
15613 simpler, since we don't have to worry about promoted modes. */
15615 /* Only allow this for variables declared in the outer scope of
15616 the function so we know that their lifetime always ends with a
15617 return; see g++.dg/opt/nrv6.C. We could be more flexible if
15618 we were to do this optimization in tree-ssa. */
15624 }
15626 /* Remember that we were in class scope. */
15630 /* Must mark the RESULT_DECL as being in this function. */
15633 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
15634 to the FUNCTION_DECL node itself. */
15637 /* Save away current state, if appropriate. */
15641 /* Complain if there's just no return statement. */
15646 /* Don't complain if we abort or throw. */
15647 && !current_function_returns_abnormally
15648 /* Don't complain if there's an infinite loop. */
15649 && !current_function_infinite_loop
15650 /* Don't complain if we are declared noreturn. */
15654 /* Structor return values (if any) are set by the compiler. */
15658 {
15662 }
15664 /* Store the end of the function, so that we get good line number
15665 info for the epilogue. */
15668 /* Complain about parameters that are only set, but never otherwise used. */
15670 && !processing_template_decl
15673 {
15674 tree decl;
15677 decl;
15691 OPT_Wunused_but_set_parameter,
15694 }
15696 /* Complain about locally defined typedefs that are not used in this
15697 function. */
15700 /* Possibly warn about unused parameters. */
15702 && !processing_template_decl
15706 /* Genericize before inlining. */
15708 {
15711 /* Clear out the bits we don't need. */
15721 }
15722 /* Clear out the bits we don't need. */
15725 /* We're leaving the context of this function, so zap cfun. It's still in
15726 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
15730 /* If this is an in-class inline definition, we may have to pop the
15731 bindings for the template parameters that we added in
15732 maybe_begin_member_template_processing when start_function was
15733 called. */
15737 /* Leave the scope of the class. */
15743 /* Clean up. */
15748 }
15749 \f
15750 /* Create the FUNCTION_DECL for a function definition.
15751 DECLSPECS and DECLARATOR are the parts of the declaration;
15752 they describe the return type and the name of the function,
15753 but twisted together in a fashion that parallels the syntax of C.
15755 This function creates a binding context for the function body
15756 as well as setting up the FUNCTION_DECL in current_function_decl.
15758 Returns a FUNCTION_DECL on success.
15760 If the DECLARATOR is not suitable for a function (it defines a datum
15761 instead), we return 0, which tells yyparse to report a parse error.
15763 May return void_type_node indicating that this method is actually
15764 a friend. See grokfield for more details.
15766 Came here with a `.pushlevel' .
15768 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
15769 CHANGES TO CODE IN `grokfield'. */
15771 tree
15774 {
15782 {
15785 }
15790 /* Pass friends other than inline friend functions back. */
15795 {
15800 }
15809 /* We process method specializations in finish_struct_1. */
15811 {
15815 }
15818 {
15820 {
15823 }
15824 }
15830 }
15831 \f
15833 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
15834 we can lay it out later, when and if its type becomes complete.
15836 Also handle constexpr variables where the initializer involves
15837 an unlowered PTRMEM_CST because the class isn't complete yet. */
15839 void
15841 {
15844 /* Keep track of variables with incomplete types. */
15847 {
15855 /* RTTI TD entries are created while defining the type_info. */
15858 {
15861 }
15865 {
15866 /* When the outermost open class is complete we can resolve any
15867 pointers-to-members. */
15871 }
15872 }
15873 }
15875 /* Called when a class type (given by TYPE) is defined. If there are
15876 any existing VAR_DECLs whose type has been completed by this
15877 declaration, update them now. */
15879 void
15881 {
15886 {
15888 {
15895 {
15896 /* Complete the type of the variable. The VAR_DECL itself
15897 will be laid out in expand_expr. */
15900 }
15902 /* Remove this entry from the list. */
15904 }
15905 else
15906 ix++;
15907 }
15909 /* Check for pending declarations which may have abstract type. */
15911 }
15913 /* If DECL is of a type which needs a cleanup, build and return an
15914 expression to perform that cleanup here. Return NULL_TREE if no
15915 cleanup need be done. DECL can also be a _REF when called from
15916 split_nonconstant_init_1. */
15918 tree
15920 {
15921 tree type;
15922 tree attr;
15923 tree cleanup;
15925 /* Assume no cleanup is required. */
15931 /* Handle "__attribute__((cleanup))". We run the cleanup function
15932 before the destructor since the destructor is what actually
15933 terminates the lifetime of the object. */
15936 else
15939 {
15940 tree id;
15941 tree fn;
15942 tree arg;
15944 /* Get the name specified by the user for the cleanup function. */
15946 /* Look up the name to find the cleanup function to call. It is
15947 important to use lookup_name here because that is what is
15948 used in c-common.c:handle_cleanup_attribute when performing
15949 initial checks on the attribute. Note that those checks
15950 include ensuring that the function found is not an overloaded
15951 function, or an object with an overloaded call operator,
15952 etc.; we can rely on the fact that the function found is an
15953 ordinary FUNCTION_DECL. */
15961 }
15962 /* Handle ordinary C++ destructors. */
15965 {
15967 tree addr;
15968 tree call;
15972 else
15983 else
15985 }
15987 /* build_delete sets the location of the destructor call to the
15988 current location, even though the destructor is going to be
15989 called later, at the end of the current scope. This can lead to
15990 a "jumpy" behavior for users of debuggers when they step around
15991 the end of the block. So let's unset the location of the
15992 destructor call instead. */
15998 /* Treat objects with destructors as used; the destructor may do
15999 something substantive. */
16004 }
16006 \f
16007 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
16008 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
16009 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
16011 tree
16013 {
16014 tree fntype;
16015 tree args;
16029 fntype = (cp_build_type_attribute_variant
16031 fntype = (build_exception_variant
16036 }
16038 /* DECL was originally constructed as a non-static member function,
16039 but turned out to be static. Update it accordingly. */
16041 void
16043 {
16056 }
16058 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
16059 one of the language-independent trees. */
16061 enum cp_tree_node_structure_enum
16063 {
16065 {
16082 }
16083 }
16085 /* Build the void_list_node (void_type_node having been created). */
16086 tree
16088 {
16091 }
16093 bool
16095 {
16096 /* A missing noreturn is ok for the `main' function. */
16098 }
16100 /* Return the decl used to identify the COMDAT group into which DECL should
16101 be placed. */
16103 tree
16105 {
16106 /* Virtual tables, construction virtual tables, and virtual table
16107 tables all go in a single COMDAT group, named after the primary
16108 virtual table. */
16111 /* For all other DECLs, the COMDAT group is the mangled name of the
16112 declaration itself. */
16113 else
16114 {
16116 {
16117 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
16118 into the same section as the target function. In that case
16119 we must return target's name. */
16125 else
16127 }
16128 }
16131 }
16133 /* Returns the return type for FN as written by the user, which may include
16134 a placeholder for a deduced return type. */
16136 tree
16138 {
16141 {
16148 }
16150 }
16152 /* Returns true iff DECL was declared with an auto type and it has
16153 not yet been deduced to a real type. */
16155 bool
16157 {
16161 }
16163 /* Complain if DECL has an undeduced return type. */
16165 bool
16167 {
16169 {
16173 }
16175 }