| blob | 858747eecfc35c24e8de80f9bb2a947d1032f1f6 |
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 void
3903 tree type)
3904 {
3913 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3914 eliminated. Built-in types should not be looked up name; their
3915 names are keywords that the parser can recognize. However, there
3916 is code in c-common.c that uses identifier_global_value to look
3917 up built-in types by name. */
3919 {
3923 }
3925 {
3927 {
3930 }
3932 }
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 IDENTIFIER_GLOBAL_VALUE. 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 {
6051 else
6053 }
6055 /* Recurse on this CONSTRUCTOR. */
6063 /* Make sure all the element of the constructor were used. Otherwise,
6064 issue an error about exceeding initializers. */
6066 {
6070 }
6077 }
6079 /* Verify array initializer. Returns true if errors have been reported. */
6081 bool
6083 {
6086 /* The array type itself need not be complete, because the
6087 initializer may tell us how many elements are in the array.
6088 But, the elements of the array must be complete. */
6090 {
6094 else
6097 }
6098 /* A compound literal can't have variable size. */
6102 {
6105 }
6107 }
6109 /* Subroutine of check_initializer; args are passed down from that function.
6110 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
6112 static tree
6115 {
6118 }
6120 /* Verify INIT (the initializer for DECL), and record the
6121 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
6122 grok_reference_init.
6124 If the return value is non-NULL, it is an expression that must be
6125 evaluated dynamically to initialize DECL. */
6127 static tree
6129 {
6132 tree core_type;
6134 /* Things that are going to be initialized need to have complete
6135 type. */
6139 {
6140 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
6141 it doesn't have storage to be initialized. */
6144 }
6147 /* We will have already complained. */
6151 {
6154 }
6156 {
6161 }
6162 else
6163 /* There is no way to make a variable-sized class type in GNU C++. */
6167 {
6170 {
6172 {
6175 }
6177 {
6179 "scalar object %qD requires one element in "
6183 }
6184 }
6185 }
6188 {
6195 }
6197 ;
6200 {
6202 {
6205 }
6208 /* Do not reshape constructors of vectors (they don't need to be
6209 reshaped. */
6211 {
6213 {
6215 tf_warning_or_error);
6217 }
6219 {
6220 /* Don't reshape if the class has constructors. */
6223 "in C++98 %qD must be initialized by "
6225 decl);
6226 }
6228 {
6231 }
6232 else
6233 {
6236 }
6237 }
6241 {
6244 /* We get here with code like `int a (2);' */
6246 tf_warning_or_error);
6247 }
6249 /* If DECL has an array type without a specific bound, deduce the
6250 array size from the initializer. */
6264 {
6267 /* A constructor call is a non-trivial initializer even if
6268 it isn't explicitly written. */
6272 /* If this is a constexpr initializer, expand_default_init will
6273 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6274 case, pull the initializer back out and pass it down into
6275 store_init_value. */
6280 {
6283 /* Don't call digest_init; it's unnecessary and will complain
6284 about aggregate initialization of non-aggregate classes. */
6286 }
6288 {
6289 /* Declared constexpr, but no suitable initializer; massage
6290 init appropriately so we can pass it into store_init_value
6291 for the error. */
6294 {
6298 }
6300 }
6301 else
6303 }
6306 {
6307 /* In aggregate initialization of a variable, each element
6308 initialization is a full-expression because there is no
6309 enclosing expression. */
6324 }
6325 }
6326 else
6327 {
6335 }
6341 {
6342 /* We might have set these in cp_finish_decl. */
6345 }
6349 {
6357 else
6361 {
6365 }
6367 }
6370 }
6372 /* If DECL is not a local variable, give it RTL. */
6374 static void
6376 {
6380 /* Set the DECL_ASSEMBLER_NAME for the object. */
6382 {
6383 /* The `register' keyword, when used together with an
6384 asm-specification, indicates that the variable should be
6385 placed in a particular register. */
6387 {
6390 }
6391 else
6392 {
6397 }
6398 }
6400 /* Handle non-variables up front. */
6402 {
6405 }
6407 /* If we see a class member here, it should be a static data
6408 member. */
6410 {
6412 /* An in-class declaration of a static data member should be
6413 external; it is only a declaration, and not a definition. */
6418 }
6420 /* We don't create any RTL for local variables. */
6424 /* We defer emission of local statics until the corresponding
6425 DECL_EXPR is expanded. But with constexpr its function might never
6426 be expanded, so go ahead and tell cgraph about the variable now. */
6431 /* Defer template instantiations. */
6436 /* If we're not deferring, go ahead and assemble the variable. */
6439 }
6441 /* walk_tree helper for wrap_temporary_cleanups, below. */
6443 static tree
6445 {
6446 /* Stop at types or full-expression boundaries. */
6449 {
6452 }
6455 {
6460 /* Tell honor_protect_cleanup_actions to handle this as a separate
6461 cleanup. */
6465 }
6468 }
6470 /* We're initializing a local variable which has a cleanup GUARD. If there
6471 are any temporaries used in the initializer INIT of this variable, we
6472 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6473 variable will be cleaned up properly if one of them throws.
6475 Unfortunately, there's no way to express this properly in terms of
6476 nesting, as the regions for the temporaries overlap the region for the
6477 variable itself; if there are two temporaries, the variable needs to be
6478 the first thing destroyed if either of them throws. However, we only
6479 want to run the variable's cleanup if it actually got constructed. So
6480 we need to guard the temporary cleanups with the variable's cleanup if
6481 they are run on the normal path, but not if they are run on the
6482 exceptional path. We implement this by telling
6483 honor_protect_cleanup_actions to strip the variable cleanup from the
6484 exceptional path. */
6486 static void
6488 {
6490 }
6492 /* Generate code to initialize DECL (a local variable). */
6494 static void
6496 {
6498 tree cleanup;
6506 {
6507 /* If we used it already as memory, it must stay in memory. */
6511 }
6516 /* Compute and store the initial value. */
6521 /* Generate a cleanup, if necessary. */
6524 /* Perform the initialization. */
6526 {
6530 {
6531 /* Stick simple initializers in DECL_INITIAL so that
6532 -Wno-init-self works (c++/34772). */
6537 {
6541 OPT_Winit_self,
6543 }
6544 }
6545 else
6546 {
6549 /* If we're only initializing a single object, guard the
6550 destructors of any temporaries used in its initializer with
6551 its destructor. This isn't right for arrays because each
6552 element initialization is a full-expression. */
6561 saved_stmts_are_full_exprs_p;
6562 }
6563 }
6565 /* Set this to 0 so we can tell whether an aggregate which was
6566 initialized was ever used. Don't do this if it has a
6567 destructor, so we don't complain about the 'resource
6568 allocation is initialization' idiom. Now set
6569 attribute((unused)) on types so decls of that type will be
6570 marked used. (see TREE_USED, above.) */
6572 && ! already_used
6581 }
6583 /* DECL is a VAR_DECL for a compiler-generated variable with static
6584 storage duration (like a virtual table) whose initializer is a
6585 compile-time constant. Initialize the variable and provide it to the
6586 back end. */
6588 void
6590 {
6591 tree init;
6601 }
6603 /* INIT is the initializer for a variable, as represented by the
6604 parser. Returns true iff INIT is type-dependent. */
6606 static bool
6608 {
6610 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6613 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6614 {
6627 }
6628 else
6629 /* It must be a simple expression, e.g., int i = 3; */
6633 }
6635 /* INIT is the initializer for a variable, as represented by the
6636 parser. Returns true iff INIT is value-dependent. */
6638 static bool
6640 {
6642 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6645 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6646 {
6656 }
6657 else
6658 /* It must be a simple expression, e.g., int i = 3; */
6662 }
6664 // Returns true if a DECL is VAR_DECL with the concept specifier.
6667 {
6669 // Not all variables have DECL_LANG_SPECIFIC.
6672 }
6674 /* A helper function to be called via walk_tree. If any label exists
6675 under *TP, it is (going to be) forced. Set has_forced_label_in_static. */
6677 static tree
6679 {
6685 }
6687 /* Finish processing of a declaration;
6688 install its line number and initial value.
6689 If the length of an array type is not known before,
6690 it must be determined now, from the initial value, or it is an error.
6692 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6693 true, then INIT is an integral constant expression.
6695 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6696 if the (init) syntax was used. */
6698 void
6701 {
6702 tree type;
6707 tree auto_node;
6712 {
6716 }
6719 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6726 /* Warn about register storage specifiers except when in GNU global
6727 or local register variable extension. */
6729 {
6732 "ISO C++17 does not allow %<register%> storage "
6734 else
6737 }
6739 /* If a name was specified, get the string. */
6754 {
6755 tree d_init;
6757 {
6761 {
6762 /* init is null because we're deferring instantiating the
6763 initializer until we need it. Well, we need it now. */
6766 }
6769 }
6772 {
6776 tf_warning_or_error);
6778 }
6788 {
6793 }
6795 }
6806 {
6807 tree clone;
6809 {
6810 /* FIXME check this is 1st decl. */
6815 {
6819 }
6821 }
6823 {
6826 else
6828 }
6829 }
6832 {
6834 /* If DECL is a reference, then we want to know whether init is a
6835 reference constant; init_const_expr_p as passed tells us whether
6836 it's an rvalue constant. */
6840 {
6841 /* Set these flags now for templates. We'll update the flags in
6842 store_init_value for instantiations. */
6845 /* FIXME setting TREE_CONSTANT on refs breaks the back end. */
6848 }
6849 }
6852 {
6855 /* Add this declaration to the statement-tree. */
6862 {
6865 }
6867 /* Generally, initializers in templates are expanded when the
6868 template is instantiated. But, if DECL is a variable constant
6869 then it can be used in future constant expressions, so its value
6870 must be available. */
6875 && init_const_expr_p
6880 {
6881 /* This variable seems to be a non-dependent constant, so process
6882 its initializer. If check_initializer returns non-null the
6883 initialization wasn't constant after all. */
6884 tree init_code;
6890 }
6894 {
6895 /* Deduce array size even if the initializer is dependent. */
6897 /* And complain about multiple initializers. */
6901 tf_warning_or_error);
6902 }
6907 }
6909 /* Just store non-static data member initializers for later. */
6913 /* Take care of TYPE_DECLs up front. */
6915 {
6918 {
6922 }
6924 /* If we have installed this as the canonical typedef for this
6925 type, and that type has not been defined yet, delay emitting
6926 the debug information for it, as we will emit it later. */
6932 at_eof);
6934 }
6936 /* A reference will be modified here, as it is initialized. */
6940 {
6943 }
6946 {
6947 /* If this is a local variable that will need a mangled name,
6948 register it now. We must do this before processing the
6949 initializer for the variable, since the initialization might
6950 require a guard variable, and since the mangled name of the
6951 guard variable will depend on the mangled name of this
6952 variable. */
6956 {
6958 /* Normally has_forced_label_in_static is set during GIMPLE
6959 lowering, but [cd]tors are never actually compiled directly.
6960 We need to set this early so we can deal with the label
6961 address extension. */
6965 {
6968 }
6969 /* And make sure it's in the symbol table for
6970 c_parse_final_cleanups to find. */
6972 }
6974 /* Convert the initializer to the type of DECL, if we have not
6975 already initialized DECL. */
6977 /* If !DECL_EXTERNAL then DECL is being defined. In the
6978 case of a static data member initialized inside the
6979 class-specifier, there can be an initializer even if DECL
6980 is *not* defined. */
6982 {
6986 /* Handle:
6988 [dcl.init]
6990 The memory occupied by any object of static storage
6991 duration is zero-initialized at program startup before
6992 any other initialization takes place.
6994 We cannot create an appropriate initializer until after
6995 the type of DECL is finalized. If DECL_INITIAL is set,
6996 then the DECL is statically initialized, and any
6997 necessary zero-initialization has already been performed. */
7002 /* Remember that the initialization for this variable has
7003 taken place. */
7005 /* This declaration is the definition of this variable,
7006 unless we are initializing a static data member within
7007 the class specifier. */
7010 }
7011 /* If the variable has an array type, lay out the type, even if
7012 there is no initializer. It is valid to index through the
7013 array, and we must get TYPE_ALIGN set correctly on the array
7014 type. */
7021 /* So decl is a global variable or a static member of a
7022 non local class. Record the types it uses
7023 so that we can decide later to emit debug info for them. */
7025 }
7027 /* Add this declaration to the statement-tree. This needs to happen
7028 after the call to check_initializer so that the DECL_EXPR for a
7029 reference temp is added before the DECL_EXPR for the reference itself. */
7031 {
7032 /* If we're building a variable sized type, and we might be
7033 reachable other than via the top of the current binding
7034 level, then create a new BIND_EXPR so that we deallocate
7035 the object at the right time. */
7040 {
7041 tree bind;
7046 }
7048 }
7050 /* Let the middle end know about variables and functions -- but not
7051 static data members in uninstantiated class templates. */
7053 {
7055 {
7058 }
7060 /* This needs to happen after the linkage is set. */
7064 {
7065 /* If a TREE_READONLY variable needs initialization
7066 at runtime, it is no longer readonly and we need to
7067 avoid MEM_READONLY_P being set on RTL created for it. */
7069 {
7073 }
7077 /* Likewise if it needs destruction. */
7080 }
7084 /* Check for abstractness of the type. Notice that there is no
7085 need to strip array types here since the check for those types
7086 is already done within create_array_type_for_decl. */
7090 /* No initialization required. */
7091 ;
7093 {
7095 {
7097 {
7098 /* An out-of-class default definition is defined at
7099 the point where it is explicitly defaulted. */
7104 }
7105 else
7107 }
7108 /* else no initialization required. */
7109 }
7113 {
7116 }
7117 /* A variable definition. */
7119 /* Initialize the local variable. */
7122 /* If a variable is defined, and then a subsequent
7123 definition with external linkage is encountered, we will
7124 get here twice for the same variable. We want to avoid
7125 calling expand_static_init more than once. For variables
7126 that are not static data members, we can call
7127 expand_static_init only when we actually process the
7128 initializer. It is not legal to redeclare a static data
7129 member, so this issue does not arise in that case. */
7132 }
7134 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
7135 reference, insert it in the statement-tree now. */
7137 {
7142 }
7148 }
7150 /* For class TYPE return itself or some its bases that contain
7151 any direct non-static data members. Return error_mark_node if an
7152 error has been diagnosed. */
7154 static tree
7156 {
7164 {
7168 else
7173 }
7175 {
7183 }
7184 else
7194 {
7199 {
7201 {
7206 }
7210 /* OK, found the same base along another path. We'll complain
7213 {
7215 "classes %qT and %qT have non-static data "
7218 }
7219 else
7221 }
7222 }
7224 }
7226 /* Return std::tuple_size<TYPE>::value. */
7228 static tree
7230 {
7246 else
7248 }
7250 /* Return std::tuple_element<I,TYPE>::type. */
7252 static tree
7254 {
7262 tf_warning_or_error);
7265 }
7267 /* Return e.get<i>() or get<i>(e). */
7269 static tree
7271 {
7279 /* [The id-expression] e is an lvalue if the type of the entity e is an
7280 lvalue reference and an xvalue otherwise. */
7288 {
7293 }
7294 else
7295 {
7301 }
7302 }
7304 /* It's impossible to recover the decltype of a tuple decomposition variable
7305 based on the actual type of the variable, so store it in a hash table. */
7307 static void
7309 {
7313 }
7315 tree
7317 {
7319 }
7321 /* Finish a decomposition declaration. DECL is the underlying declaration
7322 "e", FIRST is the head of a chain of decls for the individual identifiers
7323 chained through DECL_CHAIN in reverse order and COUNT is the number of
7324 those decls. */
7326 void
7328 {
7330 {
7331 error_out:
7333 {
7336 {
7339 }
7341 }
7345 }
7349 /* This happens for range for when not in templates.
7350 Still add the DECL_VALUE_EXPRs for later processing. */
7351 || (!processing_template_decl
7353 {
7355 {
7357 {
7363 }
7367 }
7369 }
7375 {
7378 }
7384 {
7387 }
7392 {
7393 tree nelts;
7398 {
7401 }
7404 {
7405 cnt_mismatch:
7409 else
7413 }
7416 {
7424 NULL_TREE);
7427 }
7428 }
7429 /* 2 GNU extensions. */
7431 {
7437 {
7445 t);
7448 }
7449 }
7451 {
7457 {
7467 NULL_TREE);
7470 }
7471 }
7473 {
7475 {
7479 }
7485 {
7496 {
7500 }
7501 /* Save the decltype away before reference collapse. */
7507 {
7508 /* In this case the names are variables, not just proxies. */
7511 }
7515 }
7516 /* Ignore reads from the underlying decl performed during initialization
7517 of the individual variables. If those will be read, we'll mark
7518 the underlying decl as read at that point. */
7520 }
7522 {
7525 }
7527 {
7530 }
7532 {
7535 }
7536 else
7537 {
7542 {
7546 }
7550 else
7551 eltscnt++;
7556 {
7560 }
7565 else
7566 {
7568 NULL_TREE);
7574 {
7577 }
7578 i++;
7579 }
7580 }
7582 {
7585 {
7590 }
7591 }
7594 }
7596 /* Returns a declaration for a VAR_DECL as if:
7598 extern "C" TYPE NAME;
7600 had been seen. Used to create compiler-generated global
7601 variables. */
7603 static tree
7605 {
7606 tree decl;
7614 /* If the user has explicitly declared this variable (perhaps
7615 because the code we are compiling is part of a low-level runtime
7616 library), then it is possible that our declaration will be merged
7617 with theirs by pushdecl. */
7623 }
7625 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
7626 if "__cxa_atexit" is not being used) corresponding to the function
7627 to be called when the program exits. */
7629 static tree
7631 {
7632 tree fn_type;
7635 {
7636 tree arg_type;
7639 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
7641 else
7642 /* The parameter to "atexit" is "void (*)(void)". */
7648 }
7651 }
7653 /* Returns a pointer to the `atexit' function. Note that if
7654 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
7655 `__cxa_atexit' function specified in the IA64 C++ ABI. */
7657 static tree
7659 {
7660 tree atexit_fndecl;
7661 tree fn_type;
7662 tree fn_ptr_type;
7670 {
7671 /* The declaration for `__cxa_atexit' is:
7673 int __cxa_atexit (void (*)(void *), void *, void *)
7675 We build up the argument types and then the function type
7676 itself. */
7680 /* First, build the pointer-to-function type for the first
7681 argument. */
7683 /* Then, build the rest of the argument types. */
7686 {
7689 }
7690 else
7691 {
7694 }
7695 /* And the final __cxa_atexit type. */
7698 NULL_TREE);
7701 else
7703 }
7704 else
7705 {
7706 /* The declaration for `atexit' is:
7708 int atexit (void (*)());
7710 We build up the argument types and then the function type
7711 itself. */
7713 /* Build the final atexit type. */
7717 }
7719 /* Now, build the function declaration. */
7727 }
7729 /* Like get_atexit_node, but for thread-local cleanups. */
7731 static tree
7733 {
7734 /* The declaration for `__cxa_thread_atexit' is:
7736 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7740 NULL_TREE);
7742 /* Now, build the function declaration. */
7746 }
7748 /* Returns the __dso_handle VAR_DECL. */
7750 static tree
7752 {
7756 /* Declare the variable. */
7758 ptr_type_node);
7760 #ifdef HAVE_GAS_HIDDEN
7762 {
7765 }
7766 #endif
7769 }
7771 /* Begin a new function with internal linkage whose job will be simply
7772 to destroy some particular variable. */
7776 static tree
7778 {
7780 tree fntype;
7781 tree fndecl;
7787 /* No need to mangle this. */
7790 /* Build the name of the function. */
7792 /* Build the function declaration. */
7795 /* It's a function with internal linkage, generated by the
7796 compiler. */
7799 /* Make the function `inline' so that it is only emitted if it is
7800 actually needed. It is unlikely that it will be inlined, since
7801 it is only called via a function pointer, but we avoid unnecessary
7802 emissions this way. */
7805 /* Build the parameter. */
7807 {
7812 }
7820 }
7822 /* Finish the cleanup function begun by start_cleanup_fn. */
7824 static void
7826 {
7830 }
7832 /* Generate code to handle the destruction of DECL, an object with
7833 static storage duration. */
7835 tree
7837 {
7838 tree cleanup;
7839 tree addr;
7840 tree compound_stmt;
7841 tree fcall;
7842 tree type;
7845 tree atex_node;
7851 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7852 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7853 destructor to "__cxa_atexit"; we don't have to build a temporary
7854 function to do the cleanup. */
7855 dso_parm = (flag_use_cxa_atexit
7860 {
7863 /* Make sure it is accessible. */
7865 tf_warning_or_error);
7866 }
7867 else
7868 {
7869 /* Call build_cleanup before we enter the anonymous function so
7870 that any access checks will be done relative to the current
7871 scope, rather than the scope of the anonymous function. */
7874 /* Now start the function. */
7877 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7878 to the original function, rather than the anonymous one. That
7879 will make the back end think that nested functions are in use,
7880 which causes confusion. */
7885 /* Create the body of the anonymous function. */
7890 }
7892 /* Call atexit with the cleanup function. */
7898 else
7902 {
7903 /* We must convert CLEANUP to the type that "__cxa_atexit"
7904 expects. */
7906 /* "__cxa_atexit" will pass the address of DECL to the
7907 cleanup function. */
7910 /* The declared type of the parameter to "__cxa_atexit" is
7911 "void *". For plain "T*", we could just let the
7912 machinery in cp_build_function_call convert it -- but if the
7913 type is "cv-qualified T *", then we need to convert it
7914 before passing it in, to avoid spurious errors. */
7916 }
7917 else
7918 /* Since the cleanup functions we build ignore the address
7919 they're given, there's no reason to pass the actual address
7920 in, and, in general, it's cheaper to pass NULL than any
7921 other value. */
7926 tf_warning_or_error);
7928 /* Just pass NULL to the dso handle parm if we don't actually
7929 have a DSO handle on this target. */
7931 else
7935 {
7938 {
7941 }
7942 else
7943 {
7946 }
7947 }
7948 else
7949 {
7952 }
7955 }
7957 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7958 is its initializer. Generate code to handle the construction
7959 and destruction of DECL. */
7961 static void
7963 {
7967 /* Some variables require no dynamic initialization. */
7969 {
7970 /* Make sure the destructor is callable. */
7974 }
7978 {
7982 else
7987 {
7989 "C++11 %<thread_local%> allows dynamic initialization "
7992 }
7994 }
7997 {
7998 /* Emit code to perform this initialization but once. */
8003 /* We don't need thread-safety code for thread-local vars. */
8007 /* Emit code to perform this initialization but once. This code
8008 looks like:
8010 static <type> guard;
8011 if (!__atomic_load (guard.first_byte)) {
8012 if (__cxa_guard_acquire (&guard)) {
8013 bool flag = false;
8014 try {
8015 // Do initialization.
8016 flag = true; __cxa_guard_release (&guard);
8017 // Register variable for destruction at end of program.
8018 } catch {
8019 if (!flag) __cxa_guard_abort (&guard);
8020 }
8021 }
8022 }
8024 Note that the `flag' variable is only set to 1 *after* the
8025 initialization is complete. This ensures that an exception,
8026 thrown during the construction, will cause the variable to
8027 reinitialized when we pass through this code again, as per:
8029 [stmt.dcl]
8031 If the initialization exits by throwing an exception, the
8032 initialization is not complete, so it will be tried again
8033 the next time control enters the declaration.
8035 This process should be thread-safe, too; multiple threads
8036 should not be able to initialize the variable more than
8037 once. */
8039 /* Create the guard variable. */
8042 /* Begin the conditional initialization. */
8049 {
8062 acquire_fn = push_library_fn
8065 NULL_TREE),
8070 NULL_TREE);
8080 inner_if_stmt);
8088 void_node,
8092 /* Do the initialization itself. */
8094 init = add_stmt_to_compound
8096 init = add_stmt_to_compound
8098 }
8099 else
8102 /* Use atexit to register a function for destroying this static
8103 variable. */
8109 {
8113 }
8118 }
8121 else
8123 }
8125 \f
8126 /* Make TYPE a complete type based on INITIAL_VALUE.
8127 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8128 2 if there was no information (in which case assume 0 if DO_DEFAULT),
8129 3 if the initializer list is empty (in pedantic mode). */
8131 int
8133 {
8137 /* Don't get confused by a CONSTRUCTOR for some other type. */
8144 {
8146 tree value;
8148 /* An array of character type can be initialized from a
8149 brace-enclosed string constant.
8151 FIXME: this code is duplicated from reshape_init. Probably
8152 we should just call reshape_init here? */
8156 {
8163 }
8165 /* If any of the elements are parameter packs, we can't actually
8166 complete this type now because the array size is dependent. */
8168 {
8171 {
8174 }
8175 }
8176 }
8180 /* We can create the array before the element type is complete, which
8181 means that we didn't have these two bits set in the original type
8182 either. In completing the type, we are expected to propagate these
8183 bits. See also complete_type which does the same thing for arrays
8184 of fixed size. */
8187 {
8192 }
8195 }
8197 /* As above, but either give an error or reject zero-size arrays, depending
8198 on COMPLAIN. */
8200 int
8203 {
8206 /* In SFINAE context we can't be lenient about zero-size arrays. */
8213 {
8219 {
8222 }
8226 }
8228 }
8229 \f
8230 /* Return zero if something is declared to be a member of type
8231 CTYPE when in the context of CUR_TYPE. STRING is the error
8232 message to print in that case. Otherwise, quietly return 1. */
8234 static int
8236 {
8238 {
8241 else
8244 }
8246 }
8247 \f
8248 /* Subroutine of `grokdeclarator'. */
8250 /* Generate errors possibly applicable for a given set of specifiers.
8251 This is for ARM $7.1.2. */
8253 static void
8261 {
8263 {
8300 }
8304 && !flag_noexcept_type
8310 }
8312 /* DECL is a member function or static data member and is presently
8313 being defined. Check that the definition is taking place in a
8314 valid namespace. */
8316 static void
8318 {
8319 /* These checks only apply to member functions and static data
8320 members. */
8322 /* We check for problems with specializations in pt.c in
8323 check_specialization_namespace, where we can issue better
8324 diagnostics. */
8327 /* We check this in check_explicit_instantiation_namespace. */
8330 /* [class.mfct]
8332 A member function definition that appears outside of the
8333 class definition shall appear in a namespace scope enclosing
8334 the class definition.
8336 [class.static.data]
8338 The definition for a static data member shall appear in a
8339 namespace scope enclosing the member's class definition. */
8343 }
8345 /* Build a PARM_DECL for the "this" parameter of FN. TYPE is the
8346 METHOD_TYPE for a non-static member function; QUALS are the
8347 cv-qualifiers that apply to the function. */
8349 tree
8351 {
8352 tree this_type;
8353 tree qual_type;
8354 tree parm;
8355 cp_cv_quals this_quals;
8358 {
8359 this_type
8362 }
8363 else
8365 /* The `this' parameter is implicitly `const'; it cannot be
8366 assigned to. */
8372 }
8374 /* DECL is a static member function. Complain if it was declared
8375 with function-cv-quals. */
8377 static void
8379 {
8382 decl);
8383 }
8385 // Check that FN takes no arguments and returns bool.
8386 static void
8388 {
8389 // A constraint is nullary.
8393 // The declared return type of the concept shall be bool, and
8394 // it shall not be deduced from it definition.
8400 }
8402 /* Helper function. Replace the temporary this parameter injected
8403 during cp_finish_omp_declare_simd with the real this parameter. */
8405 static tree
8407 {
8416 }
8418 /* CTYPE is class type, or null if non-class.
8419 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8420 or METHOD_TYPE.
8421 DECLARATOR is the function's name.
8422 PARMS is a chain of PARM_DECLs for the function.
8423 VIRTUALP is truthvalue of whether the function is virtual or not.
8424 FLAGS are to be passed through to `grokclassfn'.
8425 QUALS are qualifiers indicating whether the function is `const'
8426 or `volatile'.
8427 RAISES is a list of exceptions that this function can raise.
8428 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8429 not look, and -1 if we should not call `grokclassfn' at all.
8431 SFK is the kind of special function (if any) for the new function.
8433 Returns `NULL_TREE' if something goes wrong, after issuing
8434 applicable error messages. */
8436 static tree
8438 tree type,
8439 tree declarator,
8440 tree parms,
8441 tree orig_declarator,
8442 tree decl_reqs,
8445 cp_cv_quals quals,
8446 cp_ref_qualifier rqual,
8447 tree raises,
8453 special_function_kind sfk,
8456 tree in_namespace,
8458 location_t location)
8459 {
8460 tree decl;
8462 tree t;
8464 // Was the concept specifier present?
8467 // Concept declarations must have a corresponding definition.
8469 {
8472 }
8481 /* Set the constraints on the declaration. */
8483 {
8488 /* Adjust the required expression into a constraint. */
8494 }
8496 /* If we have an explicit location, use it, otherwise use whatever
8497 build_lang_decl used (probably input_location). */
8502 {
8507 /* Allocate space to hold the vptr bit if needed. */
8509 }
8515 /* Propagate volatile out from type to decl. */
8519 /* Setup decl according to sfk. */
8521 {
8534 }
8537 {
8540 orig_declarator);
8541 else
8542 {
8547 {
8548 /* Something like `template <class T> friend void f<T>()'. */
8551 orig_declarator);
8553 }
8556 /* A friend declaration of the form friend void f<>(). Record
8557 the information in the TEMPLATE_ID_EXPR. */
8566 {
8569 decl);
8571 }
8574 {
8577 decl);
8579 }
8580 }
8581 }
8583 /* If this decl has namespace scope, set that up. */
8589 /* `main' and builtins have implicit 'C' linkage. */
8604 /* Should probably propagate const out from type to decl I bet (mrs). */
8606 {
8609 }
8615 {
8619 }
8622 {
8633 }
8635 /* Members of anonymous types and local classes have no linkage; make
8636 them internal. If a typedef is made later, this will be changed. */
8642 {
8643 /* [basic.link]: A name with no linkage (notably, the name of a class
8644 or enumeration declared in a local scope) shall not be used to
8645 declare an entity with linkage.
8647 DR 757 relaxes this restriction for C++0x. */
8649 }
8653 {
8656 }
8658 /* If the declaration was declared inline, mark it as such. */
8660 {
8664 }
8668 // If the concept declaration specifier was found, check
8669 // that the declaration satisfies the necessary requirements.
8671 {
8674 }
8678 {
8681 TYPE_UNQUALIFIED,
8682 REF_QUAL_NONE);
8685 {
8689 decl);
8691 }
8694 {
8698 decl);
8700 }
8701 }
8704 {
8706 {
8710 }
8714 }
8719 {
8723 /* [over.literal]/6: Literal operators shall not have C linkage. */
8725 {
8728 }
8731 {
8734 {
8737 }
8741 {
8745 }
8747 {
8751 }
8752 }
8753 else
8754 {
8757 }
8758 }
8761 /* Make the init_value nonzero so pushdecl knows this is not
8762 tentative. error_mark_node is replaced later with the BLOCK. */
8769 {
8770 /* Adjust "omp declare simd" attributes. */
8773 {
8774 tree attr;
8777 {
8782 {
8784 cl = c_omp_declare_simd_clauses_to_numbers
8788 else
8790 }
8791 }
8792 }
8793 }
8795 /* Caller will do the rest of this. */
8802 /* 12.4/3 */
8810 template_count,
8821 {
8824 }
8826 /* Check main's type after attributes have been applied. */
8828 {
8830 integer_type_node))
8831 {
8833 tree newtype;
8837 }
8840 }
8843 {
8845 (processing_template_decl
8847 ? current_template_parms
8854 {
8855 tree ok;
8856 tree pushed_scope;
8859 /* Because grokfndecl is always supposed to return a
8860 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8861 here. We depend on our callers to figure out that its
8862 really a template that's being returned. */
8867 {
8868 /* Remove the `this' parm added by grokclassfn. */
8871 }
8873 {
8876 }
8878 {
8883 }
8885 /* Since we've smashed OLD_DECL to its
8886 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8890 /* Attempt to merge the declarations. This can fail, in
8891 the case of some invalid specialization declarations. */
8897 {
8901 }
8905 }
8906 }
8918 }
8920 /* decl is a FUNCTION_DECL.
8921 specifiers are the parsed virt-specifiers.
8923 Set flags to reflect the virt-specifiers.
8925 Returns decl. */
8927 static tree
8929 {
8937 }
8939 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8940 the linkage that DECL will receive in the object file. */
8942 static void
8944 {
8945 /* A static data member always has static storage duration and
8946 external linkage. Note that static data members are forbidden in
8947 local classes -- the only situation in which a class has
8948 non-external linkage. */
8951 /* For non-template classes, static data members are always put
8952 out in exactly those files where they are defined, just as
8953 with ordinary namespace-scope variables. */
8956 }
8958 /* Create a VAR_DECL named NAME with the indicated TYPE.
8960 If SCOPE is non-NULL, it is the class type or namespace containing
8961 the variable. If SCOPE is NULL, the variable should is created in
8962 the innermost enclosing scope. */
8964 static tree
8966 tree name,
8967 tree orig_declarator,
8974 tree scope)
8975 {
8976 tree decl;
8977 tree explicit_scope;
8984 /* Compute the scope in which to place the variable, but remember
8985 whether or not that scope was explicitly specified by the user. */
8988 {
8989 /* An explicit "extern" specifier indicates a namespace-scope
8990 variable. */
8995 }
8999 template, we need DECL_LANG_SPECIFIC. */
9001 /* Similarly for namespace-scope variables with language linkage
9002 other than C++. */
9005 /* Similarly for static data members. */
9007 /* Similarly for explicit specializations. */
9008 || (orig_declarator
9011 else
9016 else
9020 {
9023 }
9026 {
9028 /* This function is only called with out-of-class definitions. */
9031 }
9032 /* At top level, either `static' or no s.c. makes a definition
9033 (perhaps tentative), and absence of `static' makes it public. */
9035 {
9038 || ! constp
9039 || volatilep
9042 }
9043 /* Not at top level, only `static' makes a static definition. */
9044 else
9045 {
9048 }
9051 {
9053 {
9057 }
9060 }
9062 /* If the type of the decl has no linkage, make sure that we'll
9063 notice that in mark_used. */
9072 {
9073 /* [basic.link]: A name with no linkage (notably, the name of a class
9074 or enumeration declared in a local scope) shall not be used to
9075 declare an entity with linkage.
9077 DR 757 relaxes this restriction for C++0x. */
9080 }
9081 else
9089 /* Check that the variable can be safely declared as a concept.
9090 Note that this also forbids explicit specializations. */
9092 {
9094 {
9097 }
9098 else
9103 }
9106 {
9110 }
9112 // Handle explicit specializations and instantiations of variable templates.
9118 }
9120 /* Create and return a canonical pointer to member function type, for
9121 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
9123 tree
9125 {
9127 tree t;
9132 /* Make sure that we always have the unqualified pointer-to-member
9133 type first. */
9135 {
9138 }
9140 /* If a canonical type already exists for this type, use it. We use
9141 this method instead of type_hash_canon, because it only does a
9142 simple equality check on the list of field members. */
9150 /* Let the front end know this is a pointer to member function. */
9157 delta_type_node);
9163 /* Zap out the name so that the back end will give us the debugging
9164 information for this anonymous RECORD_TYPE. */
9167 /* Cache this pointer-to-member type so that we can find it again
9168 later. */
9177 }
9179 /* Create and return a pointer to data member type. */
9181 tree
9183 {
9185 {
9190 }
9191 else
9192 {
9195 }
9196 }
9198 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
9199 Check to see that the definition is valid. Issue appropriate error
9200 messages. Return 1 if the definition is particularly bad, or 0
9201 otherwise. */
9203 static int
9205 {
9206 /* Avoid redundant diagnostics on out-of-class definitions. */
9209 /* Can't check yet if we don't know the type. */
9212 /* If DECL is declared constexpr, we'll do the appropriate checks
9213 in check_initializer. Similarly for inline static data members. */
9219 {
9222 "in-class initialization of static data member %q#D of "
9226 "%<constexpr%> needed for in-class initialization of "
9228 else
9230 "in-class initialization of static data member %q#D of "
9233 }
9235 /* Motion 10 at San Diego: If a static const integral data member is
9236 initialized with an integral constant expression, the initializer
9237 may appear either in the declaration (within the class), or in
9238 the definition, but not both. If it appears in the class, the
9239 member is a member constant. The file-scope definition is always
9240 required. */
9242 {
9244 "invalid in-class initialization of static data member "
9246 type);
9248 }
9251 "ISO C++ forbids in-class initialization of non-const "
9253 decl);
9256 "ISO C++ forbids initialization of member constant "
9260 }
9262 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
9263 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
9264 expressions out into temporary variables so that walk_tree doesn't
9265 step into them (c++/15764). */
9267 static tree
9269 {
9273 {
9279 }
9283 }
9285 /* Entry point for the above. */
9287 static void
9289 {
9291 /* Break out any function calls into temporary variables. */
9293 }
9295 /* Reduce a SIZEOF_EXPR to its value. */
9297 tree
9299 {
9300 tree r;
9307 else
9313 }
9315 /* Given the SIZE (i.e., number of elements) in an array, compute
9316 an appropriate index type for the array. If non-NULL, NAME is
9317 the name of the entity being declared. */
9319 tree
9321 {
9322 tree itype;
9329 {
9336 /* In C++98, we mark a non-constant array bound with a magic
9338 else
9339 {
9344 {
9347 {
9353 else
9356 }
9360 }
9367 }
9372 /* The array bound must be an integer type. */
9374 {
9379 else
9383 }
9384 }
9386 /* A type is dependent if it is...an array type constructed from any
9387 dependent type or whose size is specified by a constant expression
9388 that is value-dependent. */
9389 /* We can only call value_dependent_expression_p on integral constant
9390 expressions; treat non-constant expressions as dependent, too. */
9394 {
9395 /* We cannot do any checking for a SIZE that isn't known to be
9396 constant. Just build the index type and mark that it requires
9397 structural equality checks. */
9404 }
9407 {
9412 /* Use the folded result for VLAs, too; it will have resolved
9413 SIZEOF_EXPR. */
9415 }
9417 /* Normally, the array-bound will be a constant. */
9419 {
9420 /* Check to see if the array bound overflowed. Make that an
9421 error, no matter how generous we're being. */
9424 /* An array must have a positive number of elements. */
9426 {
9431 else
9434 }
9435 /* As an extension we allow zero-sized arrays. */
9437 {
9439 /* We must fail if performing argument deduction (as
9440 indicated by the state of complain), so that
9441 another substitution can be found. */
9447 else
9449 }
9450 }
9452 /* We don't allow VLAs at non-function scopes, or during
9453 tentative template substitution. */
9456 {
9459 /* `(int) &fn' is not a valid array bound. */
9462 name);
9463 else
9466 }
9468 {
9471 else
9473 }
9475 {
9479 else
9482 }
9485 /* A variable sized array. */
9487 else
9488 {
9489 HOST_WIDE_INT saved_processing_template_decl;
9491 /* Compute the index of the largest element in the array. It is
9492 one less than the number of elements in the array. We save
9493 and restore PROCESSING_TEMPLATE_DECL so that computations in
9494 cp_build_binary_op will be appropriately folded. */
9498 MINUS_EXPR,
9501 complain),
9502 complain);
9507 {
9508 /* A variable sized array. */
9515 {
9516 /* We have to add 1 -- in the ubsan routine we generate
9517 LE_EXPR rather than LT_EXPR. */
9522 }
9523 }
9524 /* Make sure that there was no overflow when creating to a signed
9525 index type. (For example, on a 32-bit machine, an array with
9526 size 2^32 - 1 is too big.) */
9529 {
9534 }
9535 }
9537 /* Create and return the appropriate index type. */
9540 /* If the index type were dependent, we would have returned early, so
9541 remember that it isn't. */
9545 }
9547 /* Returns the scope (if any) in which the entity declared by
9548 DECLARATOR will be located. If the entity was declared with an
9549 unqualified name, NULL_TREE is returned. */
9551 tree
9553 {
9557 /* If the declarator-id is a SCOPE_REF, the scope in which the
9558 declaration occurs is the first operand. */
9563 /* Otherwise, the declarator is not a qualified name; the entity will
9564 be declared in the current scope. */
9566 }
9568 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
9569 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
9570 with this type. */
9572 static tree
9574 {
9577 /* If things have already gone awry, bail now. */
9581 /* 8.3.4/1: If the type of the identifier of D contains the auto
9582 type-specifier, the program is ill-formed. */
9584 {
9587 }
9589 /* If there are some types which cannot be array elements,
9590 issue an error-message and return. */
9592 {
9596 else
9603 else
9610 else
9617 else
9623 }
9625 /* [dcl.array]
9627 The constant expressions that specify the bounds of the arrays
9628 can be omitted only for the first member of the sequence. */
9630 {
9634 name);
9635 else
9640 }
9642 /* Figure out the index type for the array. */
9646 /* [dcl.array]
9647 T is called the array element type; this type shall not be [...] an
9648 abstract class type. */
9652 }
9654 /* Returns the smallest location != UNKNOWN_LOCATION among the
9655 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
9656 and LOCATIONS[ds_restrict]. */
9658 static location_t
9660 {
9675 }
9677 /* Check that it's OK to declare a function with the indicated TYPE
9678 and TYPE_QUALS. SFK indicates the kind of special function (if any)
9679 that this function is. OPTYPE is the type given in a conversion
9680 operator declaration, or the class type for a constructor/destructor.
9681 Returns the actual return type of the function; that may be different
9682 than TYPE if an error occurs, or for certain special functions. */
9684 static tree
9686 tree type,
9687 tree optype,
9690 {
9692 {
9702 else
9713 /* We can't use the proper return type here because we run into
9714 problems with ambiguous bases and covariant returns. */
9717 else
9726 "qualifiers are not allowed on declaration of "
9737 "qualifiers are not allowed on declaration of "
9748 }
9751 }
9753 /* A variable or data member (whose unqualified name is IDENTIFIER)
9754 has been declared with the indicated TYPE. If the TYPE is not
9755 acceptable, issue an error message and return a type to use for
9756 error-recovery purposes. */
9758 tree
9760 {
9762 {
9766 {
9769 }
9770 else
9773 }
9776 }
9778 /* Handle declaring DECL as an inline variable. */
9780 static void
9782 {
9785 {
9789 }
9792 "inline variables are only available "
9795 {
9798 }
9799 }
9802 /* Assign a typedef-given name to a class or enumeration type declared
9803 as anonymous at first. This was split out of grokdeclarator
9804 because it is also used in libcc1. */
9806 void
9808 {
9811 /* Replace the anonymous name with the real name everywhere. */
9813 {
9815 /* We do not rename the debug info representing the
9816 unnamed tagged type because the standard says in
9817 [dcl.typedef] that the naming applies only for
9818 linkage purposes. */
9819 /*debug_hooks->set_name (t, decl);*/
9821 }
9826 /* If this is a typedef within a template class, the nested
9827 type is a (non-primary) template. The name for the
9828 template needs updating as well. */
9833 /* Adjust linkage now that we aren't unnamed anymore. */
9836 /* FIXME remangle member functions; member functions of a
9837 type with external linkage have external linkage. */
9839 /* Check that our job is done, and that it would fail if we
9840 attempted to do it again. */
9842 }
9844 /* Given declspecs and a declarator (abstract or otherwise), determine
9845 the name and type of the object declared and construct a DECL node
9846 for it.
9848 DECLSPECS points to the representation of declaration-specifier
9849 sequence that precedes declarator.
9851 DECL_CONTEXT says which syntactic context this declaration is in:
9852 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9853 FUNCDEF for a function definition. Like NORMAL but a few different
9854 error messages in each case. Return value may be zero meaning
9855 this definition is too screwy to try to parse.
9856 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9857 handle member functions (which have FIELD context).
9858 Return value may be zero meaning this definition is too screwy to
9859 try to parse.
9860 PARM for a parameter declaration (either within a function prototype
9861 or before a function body). Make a PARM_DECL, or return void_type_node.
9862 TPARM for a template parameter declaration.
9863 CATCHPARM for a parameter declaration before a catch clause.
9864 TYPENAME if for a typename (in a cast or sizeof).
9865 Don't make a DECL node; just return the ..._TYPE node.
9866 FIELD for a struct or union field; make a FIELD_DECL.
9867 BITFIELD for a field with specified width.
9869 INITIALIZED is as for start_decl.
9871 ATTRLIST is a pointer to the list of attributes, which may be NULL
9872 if there are none; *ATTRLIST may be modified if attributes from inside
9873 the declarator should be applied to the declaration.
9875 When this function is called, scoping variables (such as
9876 CURRENT_CLASS_TYPE) should reflect the scope in which the
9877 declaration occurs, not the scope in which the new declaration will
9878 be placed. For example, on:
9880 void S::f() { ... }
9882 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
9883 should not be `S'.
9885 Returns a DECL (if a declarator is present), a TYPE (if there is no
9886 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
9887 error occurs. */
9889 tree
9895 {
9907 /* True if this declarator is a function definition. */
9911 #if 0
9912 /* See the code below that used this. */
9914 #endif
9916 /* Keep track of what sort of function is being processed
9917 so that we can warn about default return values, or explicit
9918 return values which do not match prescribed defaults. */
9924 /* cv-qualifiers that apply to the declarator, for a declaration of
9925 a member function. */
9927 /* virt-specifiers that apply to the declarator, for a declaration of
9928 a member function. */
9930 /* ref-qualifier that applies to the declarator, for a declaration of
9931 a member function. */
9933 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
9940 /* The unqualified name of the declarator; either an
9941 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
9942 tree unqualified_id;
9943 /* The class type, if any, in which this entity is located,
9944 or NULL_TREE if none. Note that this value may be different from
9945 the current class type; for example if an attempt is made to declare
9946 "A::f" inside "B", this value will be "A". */
9948 /* The NAMESPACE_DECL for the namespace in which this entity is
9949 located. If an unqualified name is used to declare the entity,
9950 this value will be NULL_TREE, even if the entity is located at
9951 namespace scope. */
9953 cp_storage_class storage_class;
9974 // Was concept_p specified? Note that ds_concept
9975 // implies ds_constexpr!
10008 /* Look inside a declarator for the name being declared
10009 and get it as a string, for an error message. */
10011 id_declarator;
10013 {
10018 {
10022 {
10026 }
10030 {
10036 {
10038 {
10039 /* [dcl.meaning]
10041 A declarator-id shall not be qualified except
10042 for ...
10044 None of the cases are permitted in block
10045 scope. */
10048 decl);
10052 else
10056 }
10058 {
10061 {
10064 }
10066 && current_class_type
10068 current_class_type))
10069 {
10073 }
10074 }
10077 }
10079 {
10081 {
10083 {
10086 }
10089 {
10092 }
10099 }
10103 {
10109 }
10110 /* Fall through. */
10117 {
10119 dname);
10121 }
10124 else
10125 {
10132 else
10134 }
10139 }
10141 }
10158 }
10161 }
10163 /* [dcl.fct.edf]
10165 The declarator in a function-definition shall have the form
10166 D1 ( parameter-declaration-clause) ... */
10168 {
10171 }
10176 {
10179 }
10182 {
10185 {
10188 }
10191 {
10193 {
10196 }
10198 {
10201 }
10202 }
10203 }
10205 /* Anything declared one level down from the top level
10206 must be one of the parameters of a function
10207 (because the body is at least two levels down). */
10209 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
10210 by not allowing C++ class definitions to specify their parameters
10211 with xdecls (must be spec.d in the parmlist).
10213 Since we now wait to push a class scope until we are sure that
10214 we are in a legitimate method context, we must set oldcname
10215 explicitly (since current_class_name is not yet alive).
10217 We also want to avoid calling this a PARM if it is in a namespace. */
10220 {
10226 }
10232 {
10235 }
10238 {
10241 }
10243 /* If there were multiple types specified in the decl-specifier-seq,
10244 issue an error message. */
10246 {
10249 }
10252 {
10255 }
10257 /* Extract the basic type from the decl-specifier-seq. */
10260 {
10263 }
10264 /* If the entire declaration is itself tagged as deprecated then
10265 suppress reports of deprecated items. */
10270 {
10277 }
10278 /* No type at all: default to `int', and set DEFAULTED_INT
10279 because it was not a user-defined typedef. */
10281 {
10283 {
10284 /* These imply 'int'. */
10287 }
10288 /* If we just have "complex", it is equivalent to "complex double". */
10291 {
10294 "ISO C++ does not support plain %<complex%> meaning "
10296 }
10297 }
10298 /* Gather flags. */
10302 #if 0
10303 /* See the code below that used this. */
10306 #endif
10311 else
10315 {
10317 ctor_return_type,
10318 type_quals,
10321 }
10323 {
10328 /* We handle `main' specially here, because 'main () { }' is so
10329 common. With no options, it is allowed. With -Wreturn-type,
10330 it is a warning. It is only an error with -pedantic-errors. */
10331 is_main = (funcdef_flag
10347 else
10352 /* FIXME we should be able to propagate the error_mark_node as is
10353 for other contexts too. */
10355 else
10357 }
10362 {
10364 {
10368 }
10373 }
10375 /* Now process the modifiers that were specified
10376 and check for invalid combinations. */
10378 /* Long double is a special combination. */
10380 {
10384 }
10386 /* Check all other uses of type modifiers. */
10389 {
10411 {
10416 }
10417 else
10418 {
10421 {
10424 name);
10427 }
10428 }
10430 /* Discard the type modifiers if they are invalid. */
10432 {
10438 }
10439 }
10441 /* Decide whether an integer type is signed or not.
10442 Optionally treat bitfields as signed by default. */
10444 /* [class.bit]
10446 It is implementation-defined whether a plain (neither
10447 explicitly signed or unsigned) char, short, int, or long
10448 bit-field is signed or unsigned.
10450 Naturally, we extend this to long long as well. Note that
10451 this does not include wchar_t. */
10453 && !signed_p
10454 /* A typedef for plain `int' without `signed' can be
10455 controlled just like plain `int', but a typedef for
10456 `signed int' cannot be so controlled. */
10457 && !(typedef_decl
10461 {
10474 else
10476 }
10489 {
10492 /* If a modifier is specified, the resulting complex is the complex
10493 form of TYPE. E.g, "complex short" is "complex short int". */
10502 else
10504 }
10506 /* If we're using the injected-class-name to form a compound type or a
10507 declaration, replace it with the underlying class so we don't get
10508 redundant typedefs in the debug output. But if we are returning the
10509 type unchanged, leave it alone so that it's available to
10510 maybe_get_template_decl_from_type_decl. */
10518 type = cp_build_qualified_type_real
10522 /* We might have ignored or rejected some of the qualifiers. */
10529 {
10533 }
10545 {
10547 {
10552 }
10556 }
10559 /* Issue errors about use of storage classes for parameters. */
10561 {
10563 {
10566 }
10568 {
10571 }
10577 /* Function parameters cannot be concept. */
10580 /* Function parameters cannot be constexpr. If we saw one, moan
10581 and pretend it wasn't there. */
10583 {
10586 }
10587 }
10589 /* Give error if `virtual' is used outside of class declaration. */
10592 {
10596 }
10599 {
10614 declspecs->gnu_thread_keyword_p
10620 {
10645 }
10648 {
10650 {
10654 "type must be cv-qualified %<auto%> or reference to "
10656 }
10659 }
10669 }
10671 /* Static anonymous unions are dealt with here. */
10677 /* Warn about storage classes that are invalid for certain
10678 kinds of declarations (parameters, typenames, etc.). */
10680 && ((storage_class
10684 {
10687 }
10692 {
10696 ;
10698 ;
10700 /* C++ allows static class elements. */
10702 /* C++ also allows inlines and signed and unsigned elements,
10703 but in those cases we don't come in here. */
10704 ;
10705 else
10706 {
10709 else
10710 {
10713 else
10715 }
10721 }
10722 }
10727 {
10730 }
10734 {
10739 /* When thread_local is applied to a variable of block scope the
10740 storage-class-specifier static is implied if it does not appear
10741 explicitly. */
10744 }
10747 {
10751 }
10755 else
10756 {
10759 {
10772 }
10773 }
10776 {
10777 /* Apply the c++11 attributes to the type preceding them. */
10781 }
10783 /* Determine the type of the entity declared by recurring on the
10784 declarator. */
10786 {
10788 tree attrs;
10795 {
10807 attr_flags);
10808 }
10816 {
10824 /* [dcl.array]/1:
10826 The optional attribute-specifier-seq appertains to the
10827 array. */
10833 {
10834 tree arg_types;
10837 /* Declaring a function type. */
10843 /* Pick up type qualifiers which should be applied to `this'. */
10845 /* Pick up virt-specifiers. */
10847 /* And ref-qualifier, too */
10849 /* And tx-qualifier. */
10851 /* Pick up the exception specifications. */
10853 /* If the exception-specification is ill-formed, let's pretend
10854 there wasn't one. */
10862 /* Say it's a definition only for the CALL_EXPR
10863 closest to the identifier. */
10866 /* Handle a late-specified return type. */
10869 {
10871 {
10873 {
10878 {
10880 "%<auto%> type specifier without trailing "
10883 "only available with -std=c++14 or "
10885 }
10887 {
10891 }
10892 }
10894 {
10899 }
10901 {
10903 {
10906 "for %qT must have trailing return "
10908 else
10911 type);
10914 }
10920 else
10924 }
10925 }
10928 {
10930 /* Not using maybe_warn_cpp0x because this should
10931 always be an error. */
10934 else
10938 }
10939 }
10945 {
10948 }
10951 {
10955 /* We now know that the TYPE_QUALS don't apply to the
10956 decl, but to its return type. */
10958 }
10960 /* Error about some types functions can't return. */
10963 {
10967 }
10969 {
10973 }
10977 && funcdecl_p
10983 {
10984 /* We are within a class's scope. If our declarator name
10985 is the same as the class name, and we are defining
10986 a function, then it is a constructor/destructor, and
10987 therefore returns a void type. */
10989 /* ISO C++ 12.4/2. A destructor may not be declared
10990 const or volatile. A destructor may not be static.
10991 A destructor may not be declared with ref-qualifier.
10993 ISO C++ 12.1. A constructor may not be declared
10994 const or volatile. A constructor may not be
10995 virtual. A constructor may not be static.
10996 A constructor may not be declared with ref-qualifier. */
11002 {
11007 }
11010 {
11016 }
11020 current_class_type,
11021 flags))
11025 {
11026 /* It's a constructor. */
11030 {
11034 }
11038 }
11041 }
11043 {
11045 {
11046 /* Cannot be both friend and virtual. */
11049 }
11055 name);
11056 }
11058 {
11060 {
11063 }
11066 }
11068 {
11071 }
11080 {
11084 }
11090 {
11092 /* transaction_safe applies to the type, but
11093 transaction_safe_dynamic applies to the function. */
11096 else
11098 }
11100 /* [dcl.fct]/2:
11102 The optional attribute-specifier-seq appertains to
11103 the function type. */
11108 }
11114 /* Filter out pointers-to-references and references-to-references.
11115 We can get these if a TYPE_DECL is used. */
11118 {
11120 {
11123 }
11125 /* In C++0x, we allow reference to reference declarations
11126 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
11127 and template type arguments [14.3.1/4 temp.arg.type]. The
11128 check for direct reference to reference declarations, which
11129 are still forbidden, occurs below. Reasoning behind the change
11130 can be found in DR106, DR540, and the rvalue reference
11131 proposals. */
11133 {
11136 }
11137 }
11139 {
11144 }
11146 /* We now know that the TYPE_QUALS don't apply to the decl,
11147 but to the target of the pointer. */
11150 /* This code used to handle METHOD_TYPE, but I don't think it's
11151 possible to get it here anymore. */
11155 {
11159 memfn_quals,
11160 rqual);
11166 }
11174 type);
11176 /* When the pointed-to type involves components of variable size,
11177 care must be taken to ensure that the size evaluation code is
11178 emitted early enough to dominate all the possible later uses
11179 and late enough for the variables on which it depends to have
11180 been assigned.
11182 This is expected to happen automatically when the pointed-to
11183 type has a name/declaration of it's own, but special attention
11184 is required if the type is anonymous.
11186 We handle the NORMAL and FIELD contexts here by inserting a
11187 dummy statement that just evaluates the size at a safe point
11188 and ensures it is not deferred until e.g. within a deeper
11189 conditional context (c++/43555).
11191 We expect nothing to be needed here for PARM or TYPENAME.
11192 Evaluating the size at this point for TYPENAME would
11193 actually be incorrect, as we might be in the middle of an
11194 expression with side effects on the pointed-to type size
11195 "arguments" prior to the pointer declaration point and the
11196 size evaluation could end up prior to the side effects. */
11202 {
11206 }
11209 {
11210 /* In C++0x, the type we are creating a reference to might be
11211 a typedef which is itself a reference type. In that case,
11212 we follow the reference collapsing rules in
11213 [7.1.3/8 dcl.typedef] to create the final reference type:
11215 "If a typedef TD names a type that is a reference to a type
11216 T, an attempt to create the type 'lvalue reference to cv TD'
11217 creates the type 'lvalue reference to T,' while an attempt
11218 to create the type "rvalue reference to cv TD' creates the
11219 type TD."
11220 */
11224 {
11227 else
11229 }
11230 else
11231 type = cp_build_reference_type
11234 /* In C++0x, we need this check for direct reference to
11235 reference declarations, which are forbidden by
11236 [8.3.2/5 dcl.ref]. Reference to reference declarations
11237 are only allowed indirectly through typedefs and template
11238 type arguments. Example:
11240 void foo(int & &); // invalid ref-to-ref decl
11242 typedef int & int_ref;
11243 void foo(int_ref &); // valid ref-to-ref decl
11244 */
11248 }
11252 {
11256 /* We will already have complained. */
11258 else
11260 type);
11261 }
11262 else
11265 /* Process a list of type modifier keywords (such as
11266 const or volatile) that were given inside the `*' or `&'. */
11269 {
11270 type
11274 }
11276 /* Apply C++11 attributes to the pointer, and not to the
11277 type pointed to. This is unlike what is done for GNU
11278 attributes above. It is to comply with [dcl.ptr]/1:
11280 [the optional attribute-specifier-seq (7.6.1) appertains
11281 to the pointer and not to the object pointed to]. */
11294 }
11295 }
11297 /* A `constexpr' specifier used in an object declaration declares
11298 the object as `const'. */
11300 {
11301 /* DR1688 says that a `constexpr' specifier in combination with
11302 `volatile' is valid. */
11305 {
11308 }
11309 }
11315 {
11317 unqualified_id);
11319 }
11321 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
11322 qualified with a class-name, turn it into a METHOD_TYPE, unless
11323 we know that the function is static. We take advantage of this
11324 opportunity to do other processing that pertains to entities
11325 explicitly declared to be class members. Note that if DECLARATOR
11326 is non-NULL, we know it is a cdk_id declarator; otherwise, we
11327 would not have exited the loop above. */
11332 {
11338 {
11340 {
11344 }
11345 else
11349 }
11351 can skip the following checks. */
11354 qualifying type must certainly be complete. */
11355 funcdef_flag
11356 /* A friend declaration of "T::f" is OK, even if
11357 "T" is a template parameter. But, if this
11358 function is not a friend, the qualifying type
11359 must be a class. */
11361 /* For a declaration, the type need not be
11362 complete, if either it is dependent (since there
11363 is no meaningful definition of complete in that
11364 case) or the qualifying class is currently being
11365 defined. */
11368 /* Check that the qualifying type is complete. */
11372 {
11375 {
11383 }
11384 }
11386 {
11390 }
11391 }
11396 /* Now TYPE has the actual type. */
11399 {
11402 else
11404 }
11410 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
11411 a declarator-id appertains to the entity that is declared. */
11414 /* Handle parameter packs. */
11416 {
11418 /* Turn the type into a pack expansion.*/
11420 else
11422 }
11425 && !processing_template_decl
11427 {
11430 else
11433 }
11436 {
11437 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
11438 in the declaration of a constructor or conversion function within
11439 a class definition. */
11446 else
11448 "only declarations of constructors and conversion operators "
11451 }
11454 {
11456 {
11459 }
11461 {
11464 }
11467 {
11470 }
11472 {
11475 }
11477 {
11480 }
11482 {
11486 }
11487 }
11489 /* If this is declaring a typedef name, return a TYPE_DECL. */
11491 {
11492 tree decl;
11494 /* This declaration:
11496 typedef void f(int) const;
11498 declares a function type which is not a member of any
11499 particular class, but which is cv-qualified; for
11500 example "f S::*" declares a pointer to a const-qualified
11501 member function of S. We record the cv-qualification in the
11502 function type. */
11504 {
11507 /* We have now dealt with these qualifiers. */
11510 }
11513 {
11516 }
11523 else
11529 }
11532 {
11536 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
11538 /* The TYPE_DECL is "abstract" because there will be
11539 clones of this constructor/destructor, and there will
11540 be copies of this TYPE_DECL generated in those
11541 clones. The decloning optimization (for space) may
11542 revert this subsequently if it determines that
11543 the clones should share a common implementation. */
11545 }
11550 unqualified_id);
11552 /* If the user declares "typedef struct {...} foo" then the
11553 struct will have an anonymous name. Fill that name in now.
11554 Nothing can refer to it, so nothing needs know about the name
11555 change. */
11557 && unqualified_id
11575 /* Acknowledge that this was written:
11576 `using analias = atype;'. */
11580 }
11582 /* Detect the case of an array type of unspecified size
11583 which came, as such, direct from a typedef name.
11584 We must copy the type, so that the array's domain can be
11585 individually set by the object's initializer. */
11592 /* Detect where we're using a typedef of function type to declare a
11593 function. PARMS will not be set, so we must create it now. */
11596 {
11598 tree args;
11603 {
11609 }
11614 {
11615 /* The qualifiers on the function type become the qualifiers on
11616 the non-static member function. */
11620 }
11621 }
11623 /* If this is a type name (such as, in a cast or sizeof),
11624 compute the type and return it now. */
11627 {
11628 /* Note that here we don't care about type_quals. */
11630 /* Special case: "friend class foo" looks like a TYPENAME context. */
11632 {
11634 {
11637 }
11640 {
11641 /* Don't allow friend declaration without a class-key. */
11648 else
11651 type);
11652 }
11654 /* Only try to do this stuff if we didn't already give up. */
11656 {
11657 /* A friendly class? */
11661 else
11663 type);
11666 }
11667 }
11669 {
11676 /* Core issue #547: need to allow this in template type args.
11677 Allow it in general in C++11 for alias-declarations. */
11681 else
11683 }
11689 }
11693 && ! bitfield
11695 {
11698 }
11701 {
11702 /* Only functions may be declared using an operator-function-id. */
11704 {
11707 }
11712 type);
11713 }
11715 /* We don't check parameter types here because we can emit a better
11716 error message later. */
11718 {
11722 }
11724 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
11725 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
11728 {
11734 {
11737 else
11740 }
11742 /* A parameter declared as an array of T is really a pointer to T.
11743 One declared as a function is really a pointer to a function.
11744 One declared as a member is really a pointer to member. */
11747 {
11748 /* Transfer const-ness of array into that of type pointed to. */
11752 }
11755 }
11760 {
11766 }
11768 {
11772 {
11779 }
11781 {
11784 {
11790 else
11794 }
11796 /* The C99 flexible array extension. */
11799 {
11803 {
11806 }
11807 else
11808 {
11809 /* Array is a flexible member. */
11811 /* Do not warn on flexible array members in system
11816 else
11820 /* Flexible array member has a null domain. */
11822 }
11823 }
11826 {
11827 /* Happens when declaring arrays of sizes which
11828 are error_mark_node, for example. */
11830 }
11832 {
11833 /* Something like struct S { int N::j; }; */
11836 }
11839 {
11841 tree function_context;
11844 {
11845 /* This should never happen in pure C++ (the check
11846 could be an assert). It could happen in
11847 Objective-C++ if someone writes invalid code that
11848 uses a function declaration for an instance
11849 variable or property (instance variables and
11850 properties are parsed as FIELD_DECLs, but they are
11851 part of an Objective-C class, not a C++ class).
11852 That code is invalid and is caught by this
11853 check. */
11855 {
11857 unqualified_id);
11859 }
11861 /* ``A union may [ ... ] not [ have ] virtual functions.''
11862 ARM 9.5 */
11864 {
11866 unqualified_id);
11868 }
11873 {
11877 }
11878 }
11880 /* Check that the name used for a destructor makes sense. */
11882 {
11886 {
11891 }
11894 {
11898 }
11900 {
11903 }
11905 {
11908 }
11909 }
11911 {
11916 }
11919 {
11922 }
11924 {
11927 }
11930 {
11933 {
11939 }
11940 }
11942 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
11954 parms,
11955 unqualified_id,
11956 reqs,
11966 #if 0
11967 /* This clobbers the attrs stored in `decl' from `attrlist'. */
11968 /* The decl and setting of decl_attr is also turned off. */
11970 #endif
11972 /* [class.conv.ctor]
11974 A constructor declared without the function-specifier
11975 explicit that can be called with a single parameter
11976 specifies a conversion from the type of its first
11977 parameter to the type of its class. Such a constructor
11978 is called a converting constructor. */
11981 }
11986 {
11989 {
11991 {
11995 }
11996 else
12001 }
12002 }
12003 else
12004 {
12006 {
12010 }
12012 }
12015 {
12016 /* Friends are treated specially. */
12020 {
12022 {
12023 decl = check_explicit_specialization
12028 }
12032 funcdef_flag);
12034 }
12035 else
12037 }
12039 /* Structure field. It may not be a function, except for C++. */
12042 {
12044 {
12045 /* C++ allows static class members. All other work
12046 for this is done by grokfield. */
12054 unqualified_id);
12056 {
12060 }
12067 /* Even if there is an in-class initialization, DECL
12068 is considered undefined until an out-of-class
12069 definition is provided, unless this is an inline
12070 variable. */
12074 {
12080 }
12081 }
12082 else
12083 {
12086 unqualified_id);
12088 {
12090 unqualified_id);
12092 }
12100 {
12103 }
12106 {
12107 /* An attempt is being made to initialize a non-static
12108 member. This is new in C++11. */
12111 /* If this has been parsed with static storage class, but
12112 errors forced staticp to be cleared, ensure NSDMI is
12113 not present. */
12116 }
12117 }
12123 }
12124 }
12127 {
12128 tree original_name;
12136 else
12138 // FIXME:gcc_assert (original_name == dname);
12145 {
12148 name);
12149 else
12151 name);
12152 }
12156 /* Function declaration not at top level.
12157 Storage classes other than `extern' are not allowed
12158 and `extern' makes no difference. */
12163 {
12166 "%<static%> specifier invalid for function %qs "
12168 else
12170 "%<inline%> specifier invalid for function %qs "
12172 }
12175 {
12177 {
12180 }
12183 {
12188 }
12189 }
12191 /* Record whether the function is public. */
12201 publicp,
12204 sfk,
12205 funcdef_flag,
12214 {
12217 /* Don't allow a static member function in a class, and forbid
12218 declaring main to be static. */
12220 {
12224 }
12226 {
12227 /* 7.1.1: There can be no static function declarations within a
12228 block. */
12231 }
12234 {
12237 }
12238 }
12239 }
12240 else
12241 {
12242 /* It's a variable. */
12244 /* An uninitialized decl with `extern' is a reference. */
12246 declspecs,
12247 initialized,
12248 type_quals,
12249 inlinep,
12250 concept_p,
12251 template_count,
12261 {
12264 {
12269 }
12271 {
12274 }
12276 {
12278 "cannot explicitly declare member %q#D to have "
12281 }
12282 }
12284 {
12286 decl);
12288 }
12293 {
12298 }
12299 }
12304 {
12308 }
12311 {
12313 {
12314 /* It's common practice (and completely valid) to have a const
12315 be initialized and declared extern. */
12318 }
12319 else
12320 {
12323 }
12324 }
12326 /* Record `register' declaration for warnings on &
12327 and in case doing stupid register allocation. */
12330 {
12332 /* Warn about register storage specifiers on PARM_DECLs. */
12334 {
12337 "ISO C++17 does not allow %<register%> storage "
12339 else
12342 }
12343 }
12349 /* Set constexpr flag on vars (functions got it in grokfndecl). */
12353 /* Record constancy and volatility on the DECL itself . There's
12354 no need to do this when processing a template; we'll do this
12355 for the instantiated declaration based on the type of DECL. */
12360 }
12361 }
12362 \f
12363 /* Subroutine of start_function. Ensure that each of the parameter
12364 types (as listed in PARMS) is complete, as is required for a
12365 function definition. */
12367 static void
12369 {
12371 {
12376 {
12382 }
12383 else
12384 /* grokparms or complete_type_or_else will have already issued
12385 an error. */
12387 }
12388 }
12390 /* Returns nonzero if T is a local variable. */
12392 int
12394 {
12396 /* A VAR_DECL with a context that is a _TYPE is a static data
12397 member. */
12399 /* Any other non-local variable must be at namespace scope. */
12405 }
12407 /* Like local_variable_p, but suitable for use as a tree-walking
12408 function. */
12410 static tree
12413 {
12421 }
12423 /* Check that ARG, which is a default-argument expression for a
12424 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
12425 something goes wrong. DECL may also be a _TYPE node, rather than a
12426 DECL, if there is no DECL available. */
12428 tree
12430 {
12431 tree var;
12432 tree decl_type;
12435 /* We get a DEFAULT_ARG when looking at an in-class declaration
12436 with a default argument. Ignore the argument for now; we'll
12437 deal with it after the class is complete. */
12441 {
12444 }
12445 else
12452 /* Something already went wrong. There's no need to check
12453 further. */
12456 /* [dcl.fct.default]
12458 A default argument expression is implicitly converted to the
12459 parameter type. */
12462 LOOKUP_IMPLICIT);
12465 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
12466 the call sites. */
12471 /* [dcl.fct.default]
12473 Local variables shall not be used in default argument
12474 expressions.
12476 The keyword `this' shall not be used in a default argument of a
12477 member function. */
12480 {
12482 {
12486 else
12488 }
12490 }
12492 /* All is well. */
12494 }
12496 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
12498 static tree
12500 {
12505 {
12508 else
12510 }
12512 /* Do warn about using typedefs to a deprecated class. */
12524 return type_is_deprecated
12528 }
12530 /* Decode the list of parameter types for a function type.
12531 Given the list of things declared inside the parens,
12532 return a list of types.
12534 If this parameter does not end with an ellipsis, we append
12535 void_list_node.
12537 *PARMS is set to the chain of PARM_DECLs created. */
12539 tree
12541 {
12544 tree parm;
12548 {
12561 {
12563 && !init
12566 /* DR 577: A parameter list consisting of a single
12567 unnamed parameter of non-dependent type 'void'. */
12571 "invalid use of cv-qualified type %qT in "
12573 else
12575 "invalid use of type %<void%> in parameter "
12577 /* It's not a good idea to actually create parameters of
12578 type `void'; other parts of the compiler assume that a
12579 void type terminates the parameter list. */
12582 }
12585 {
12587 {
12591 }
12593 /* Top-level qualifiers on the parameters are
12594 ignored for function types. */
12597 {
12601 }
12605 {
12606 /* Before C++17 DR 393:
12607 [dcl.fct]/6, parameter types cannot contain pointers
12608 (references) to arrays of unknown bound. */
12613 {
12621 }
12624 ptr
12630 }
12636 }
12641 }
12649 }
12651 \f
12652 /* D is a constructor or overloaded `operator='.
12654 Let T be the class in which D is declared. Then, this function
12655 returns:
12657 -1 if D's is an ill-formed constructor or copy assignment operator
12658 whose first parameter is of type `T'.
12659 0 if D is not a copy constructor or copy assignment
12660 operator.
12661 1 if D is a copy constructor or copy assignment operator whose
12662 first parameter is a reference to non-const qualified T.
12663 2 if D is a copy constructor or copy assignment operator whose
12664 first parameter is a reference to const qualified T.
12666 This function can be used as a predicate. Positive values indicate
12667 a copy constructor and nonzero values indicate a copy assignment
12668 operator. */
12670 int
12672 {
12673 tree args;
12674 tree arg_type;
12682 /* Instantiations of template member functions are never copy
12683 functions. Note that member functions of templated classes are
12684 represented as template functions internally, and we must
12685 accept those as copy functions. */
12697 {
12698 /* Pass by value copy assignment operator. */
12700 }
12704 {
12707 }
12708 else
12714 /* There are more non-optional args. */
12718 }
12720 /* D is a constructor or overloaded `operator='.
12722 Let T be the class in which D is declared. Then, this function
12723 returns true when D is a move constructor or move assignment
12724 operator, false otherwise. */
12726 bool
12728 {
12732 /* There are no move constructors if we are in C++98 mode. */
12738 /* Instantiations of template member functions are never move
12739 functions. Note that member functions of templated classes are
12740 represented as template functions internally, and we must
12741 accept those as move functions. */
12745 }
12747 /* D is a constructor or overloaded `operator='.
12749 Then, this function returns true when D has the same signature as a move
12750 constructor or move assignment operator (because either it is such a
12751 ctor/op= or it is a template specialization with the same signature),
12752 false otherwise. */
12754 bool
12756 {
12757 tree args;
12758 tree arg_type;
12778 /* There are more non-optional args. */
12782 }
12784 /* Remember any special properties of member function DECL. */
12786 void
12788 {
12789 tree class_type;
12796 {
12803 {
12804 /* [class.copy]
12806 A non-template constructor for class X is a copy
12807 constructor if its first parameter is of type X&, const
12808 X&, volatile X& or const volatile X&, and either there
12809 are no other parameters or else all other parameters have
12810 default arguments. */
12816 }
12827 }
12829 {
12830 /* [class.copy]
12832 A non-template assignment operator for class X is a copy
12833 assignment operator if its parameter is of type X, X&, const
12834 X&, volatile X& or const volatile X&. */
12839 {
12845 }
12848 }
12852 /* Destructors are handled in check_methods. */
12853 }
12855 /* Check a constructor DECL has the correct form. Complains
12856 if the class has a constructor of the form X(X). */
12858 bool
12860 {
12864 {
12865 /* [class.copy]
12867 A declaration of a constructor for a class X is ill-formed if
12868 its first parameter is of type (optionally cv-qualified) X
12869 and either there are no other parameters or else all other
12870 parameters have default arguments.
12872 We *don't* complain about member template instantiations that
12873 have this form, though; they can occur as we try to decide
12874 what constructor to use during overload resolution. Since
12875 overload resolution will never prefer such a constructor to
12876 the non-template copy constructor (which is either explicitly
12877 or implicitly defined), there's no need to worry about their
12878 existence. Theoretically, they should never even be
12879 instantiated, but that's hard to forestall. */
12883 }
12886 }
12888 /* An operator with this code is unary, but can also be binary. */
12890 static bool
12892 {
12899 }
12901 /* An operator with this name can only be unary. */
12903 static bool
12905 {
12910 }
12912 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
12913 errors are issued for invalid declarations. */
12915 bool
12917 {
12919 tree argtype;
12925 tree class_type;
12927 /* Count the number of arguments and check for ellipsis. */
12940 else
12941 {
12942 /* It'd be nice to hang something else of the identifier to
12943 find CODE more directly. */
12949 ;
12950 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, KIND) \
12951 else if (assign_op == (KIND == cik_assign_op) \
12952 && oni[int (CODE)].identifier == name) \
12953 operator_code = (CODE);
12955 #undef DEF_OPERATOR
12956 else
12958 }
12965 {
12984 }
12986 /* [basic.std.dynamic.allocation]/1:
12988 A program is ill-formed if an allocation function is declared
12989 in a namespace scope other than global scope or declared static
12990 in global scope.
12992 The same also holds true for deallocation functions. */
12995 {
12997 {
12999 {
13002 }
13004 {
13007 }
13008 }
13009 }
13012 {
13015 }
13018 else
13019 {
13020 /* An operator function must either be a non-static member function
13021 or have at least one parameter of a class, a reference to a class,
13022 an enumeration, or a reference to an enumeration. 13.4.0.6 */
13024 {
13030 {
13033 }
13034 else
13035 {
13036 tree p;
13039 {
13043 }
13046 {
13051 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
13052 because these checks are performed even on
13053 template functions. */
13057 }
13060 {
13065 }
13066 }
13067 }
13069 /* There are no restrictions on the arguments to an overloaded
13070 "operator ()". */
13074 /* Warn about conversion operators that will never be used. */
13077 && warn_conversion
13078 /* Warn only declaring the function; there is no need to
13079 warn again about out-of-class definitions. */
13081 {
13090 ref
13096 {
13099 ref
13104 /* Don't force t to be complete here. */
13109 ref
13114 }
13116 }
13119 {
13120 /* 13.4.0.3 */
13123 }
13125 {
13128 }
13130 {
13132 /* We pick the one-argument operator codes by default, so
13133 we don't have to change anything. */
13134 ;
13136 {
13137 /* If we thought this was a unary operator, we now know
13138 it to be a binary operator. */
13140 {
13167 }
13173 && ! processing_template_decl
13175 {
13178 decl);
13179 else
13183 }
13184 }
13185 else
13186 {
13189 else
13192 }
13194 /* More Effective C++ rule 6. */
13200 {
13208 {
13211 arg))
13214 }
13215 else
13216 {
13219 }
13220 }
13221 }
13223 {
13225 {
13228 else
13231 }
13232 }
13234 {
13236 {
13239 else
13242 }
13244 /* More Effective C++ rule 7. */
13250 decl);
13251 }
13253 /* Effective C++ rule 23. */
13265 /* [over.oper]/8 */
13269 {
13273 {
13275 decl);
13276 }
13277 else
13278 {
13281 }
13282 }
13283 }
13285 }
13286 \f
13287 /* Return a string giving the keyword associate with CODE. */
13291 {
13293 {
13306 }
13307 }
13309 /* Name lookup in an elaborated-type-specifier (after the keyword
13310 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
13311 elaborated-type-specifier is invalid, issue a diagnostic and return
13312 error_mark_node; otherwise, return the *_TYPE to which it referred.
13313 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
13315 tree
13317 tree decl,
13319 {
13320 tree type;
13322 /* In the case of:
13324 struct S { struct S *p; };
13326 name lookup will find the TYPE_DECL for the implicit "S::S"
13327 typedef. Adjust for that here. */
13333 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
13334 is false for this case as well. */
13336 {
13340 }
13341 /* Accept template template parameters. */
13345 ;
13346 /* [dcl.type.elab]
13348 If the identifier resolves to a typedef-name or the
13349 simple-template-id resolves to an alias template
13350 specialization, the elaborated-type-specifier is ill-formed.
13352 In other words, the only legitimate declaration to use in the
13353 elaborated type specifier is the implicit typedef created when
13354 the type is declared. */
13358 {
13362 else
13367 }
13372 {
13376 }
13379 {
13383 }
13387 {
13388 /* If a class template appears as elaborated type specifier
13389 without a template header such as:
13391 template <class T> class C {};
13392 void f(class C); // No template header here
13394 then the required template argument is missing. */
13399 }
13402 }
13404 /* Lookup NAME in elaborate type specifier in scope according to
13405 SCOPE and issue diagnostics if necessary.
13406 Return *_TYPE node upon success, NULL_TREE when the NAME is not
13407 found, and ERROR_MARK_NODE for type error. */
13409 static tree
13412 {
13413 tree t;
13414 tree decl;
13416 {
13417 /* First try ordinary name lookup, ignoring hidden class name
13418 injected via friend declaration. */
13421 /* If that fails, the name will be placed in the smallest
13422 non-class, non-function-prototype scope according to 3.3.1/5.
13423 We may already have a hidden name declared as friend in this
13424 scope. So lookup again but not ignoring hidden names.
13425 If we find one, that name will be made visible rather than
13426 creating a new tag. */
13429 }
13430 else
13435 /* If scope is ts_current we're defining a class, so ignore a
13436 template template parameter. */
13442 {
13443 /* Look for invalid nested type:
13444 class C {
13445 class C {};
13446 }; */
13448 {
13451 decl);
13453 }
13455 /* Two cases we need to consider when deciding if a class
13456 template is allowed as an elaborated type specifier:
13457 1. It is a self reference to its own class.
13458 2. It comes with a template header.
13460 For example:
13462 template <class T> class C {
13463 class C *c1; // DECL_SELF_REFERENCE_P is true
13464 class D;
13465 };
13466 template <class U> class C; // template_header_p is true
13467 template <class T> class C<T>::D {
13468 class C *c2; // DECL_SELF_REFERENCE_P is true
13469 }; */
13472 decl,
13473 template_header_p
13478 {
13487 }
13490 }
13492 {
13496 }
13497 else
13499 }
13501 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
13502 Define the tag as a forward-reference if it is not defined.
13504 If a declaration is given, process it here, and report an error if
13505 multiple declarations are not identical.
13507 SCOPE is TS_CURRENT when this is also a definition. Only look in
13508 the current frame for the name (since C++ allows new names in any
13509 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
13510 declaration. Only look beginning from the current scope outward up
13511 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
13513 TEMPLATE_HEADER_P is true when this declaration is preceded by
13514 a set of template parameters. */
13516 static tree
13519 {
13526 {
13539 }
13541 /* In case of anonymous name, xref_tag is only called to
13542 make type node and push name. Name lookup is not required. */
13553 {
13557 /* Since SCOPE is not TS_CURRENT, we are not looking at a
13558 definition of this tag. Since, in addition, we are currently
13559 processing a (member) template declaration of a template
13560 class, we must be very careful; consider:
13562 template <class X>
13563 struct S1
13565 template <class U>
13566 struct S2
13567 { template <class V>
13568 friend struct S1; };
13570 Here, the S2::S1 declaration should not be confused with the
13571 outer declaration. In particular, the inner version should
13572 have a template parameter of level 2, not level 1. This
13573 would be particularly important if the member declaration
13574 were instead:
13576 template <class V = U> friend struct S1;
13578 say, when we should tsubst into `U' when instantiating
13579 S2. On the other hand, when presented with:
13581 template <class T>
13582 struct S1 {
13583 template <class U>
13584 struct S2 {};
13585 template <class U>
13586 friend struct S2;
13587 };
13589 we must find the inner binding eventually. We
13590 accomplish this by making sure that the new type we
13591 create to represent this declaration has the right
13592 TYPE_CONTEXT. */
13595 }
13598 {
13599 /* If no such tag is yet defined, create a forward-reference node
13600 and record it as the "definition".
13601 When a real declaration of this type is found,
13602 the forward-reference will be altered into a real type. */
13604 {
13607 }
13608 else
13609 {
13613 /* Mark it as a lambda type. */
13616 }
13617 }
13618 else
13619 {
13621 {
13622 /* Check that we aren't trying to overload a class with different
13623 constraints. */
13626 {
13629 }
13632 }
13636 {
13640 }
13642 /* Make injected friend class visible. */
13644 {
13651 {
13655 }
13656 }
13657 }
13660 }
13662 /* Wrapper for xref_tag_1. */
13664 tree
13667 {
13668 tree ret;
13674 }
13677 tree
13679 {
13684 else
13691 }
13693 /* Create the binfo hierarchy for REF with (possibly NULL) base list
13694 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
13695 access_* node, and the TREE_VALUE is the type of the base-class.
13696 Non-NULL TREE_TYPE indicates virtual inheritance. */
13698 void
13700 {
13707 tree default_access;
13713 /* The base of a derived class is private by default, all others are
13714 public. */
13719 /* First, make sure that any templates in base-classes are
13720 instantiated. This ensures that if we call ourselves recursively
13721 we do not get confused about which classes are marked and which
13722 are not. */
13725 {
13728 /* The dependent_type_p call below should really be dependent_scope_p
13729 so that we give a hard error about using an incomplete type as a
13730 base, but we allow it with a pedwarn for backward
13731 compatibility. */
13737 /* An incomplete type. Remove it from the list. */
13739 else
13740 {
13741 max_bases++;
13743 max_dvbases++;
13747 }
13748 }
13753 /* The binfo slot should be empty, unless this is an (ill-formed)
13754 redefinition. */
13765 /* Apply base-class info set up to the variants of this type. */
13769 {
13771 /* A C++98 POD cannot have base classes. */
13776 }
13783 {
13784 /* An aggregate can't have virtual base classes. */
13792 }
13795 {
13803 /* Before C++17, an aggregate cannot have base classes. In C++17, an
13804 aggregate can't have virtual, private, or protected base classes. */
13815 {
13817 basetype);
13819 }
13823 {
13825 /* The original basetype could have been a typedef'd type. */
13828 /* Inherit flags from the base. */
13839 }
13841 /* We must do this test after we've seen through a typedef
13842 type. */
13844 {
13847 else
13850 }
13853 /* Regenerate the pack expansion for the bases. */
13867 dropped_base:
13868 /* Update max_vbases to reflect the reality that we are dropping
13869 this base: if it reaches zero we want to undo the vec_alloc
13870 above to avoid inconsistencies during error-recovery: eg, in
13871 build_special_member_call, CLASSTYPE_VBASECLASSES non null
13872 and vtt null (c++/27952). */
13874 max_vbases--;
13876 max_vbases
13878 }
13885 /* If we didn't get max_vbases vbases, we must have shared at
13886 least one of them, and are therefore diamond shaped. */
13889 /* Unmark all the types. */
13894 /* Now see if we have a repeated base type. */
13896 {
13899 {
13901 {
13904 }
13906 }
13911 else
13913 }
13914 }
13916 \f
13917 /* Copies the enum-related properties from type SRC to type DST.
13918 Used with the underlying type of an enum and the enum itself. */
13919 static void
13921 {
13922 tree t;
13924 {
13934 else
13938 }
13939 }
13941 /* Begin compiling the definition of an enumeration type.
13942 NAME is its name,
13944 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
13946 UNDERLYING_TYPE is the type that will be used as the storage for
13947 the enumeration type. This should be NULL_TREE if no storage type
13948 was specified.
13950 ATTRIBUTES are any attributes specified after the enum-key.
13952 SCOPED_ENUM_P is true if this is a scoped enumeration type.
13954 if IS_NEW is not NULL, gets TRUE iff a new type is created.
13956 Returns the type object, as yet incomplete.
13957 Also records info about it so that build_enumerator
13958 may be used to declare the individual values as they are read. */
13960 tree
13963 {
13969 /* [C++0x dcl.enum]p5:
13971 If not explicitly specified, the underlying type of a scoped
13972 enumeration type is int. */
13979 /* If this is the real definition for a previous forward reference,
13980 fill in the contents in the same object that used to be the
13981 forward reference. */
13987 /* In case of a template_decl, the only check that should be deferred
13988 to instantiation time is the comparison of underlying types. */
13990 {
13992 {
13998 }
14000 {
14006 }
14012 {
14018 }
14019 }
14023 {
14024 /* In case of error, make a dummy enum to allow parsing to
14025 continue. */
14027 {
14030 }
14032 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
14033 of an opaque enum, or an opaque enum of an already defined
14034 enumeration (C++0x only).
14035 In any other case, it'll be NULL_TREE. */
14037 {
14040 }
14043 /* Do not push the decl more than once, unless we need to
14044 compare underlying types at instantiation time */
14047 || (underlying_type
14051 {
14055 /* std::byte aliases anything. */
14060 }
14061 else
14068 /* The enum is considered opaque until the opening '{' of the
14069 enumerator list. */
14072 }
14079 {
14081 /* We already checked that it matches, don't change it to a different
14084 {
14087 }
14090 else
14093 }
14095 /* If into a template class, the returned enum is always the first
14096 declaration (opaque or not) seen. This way all the references to
14097 this type will be to the same declaration. The following ones are used
14098 only to check for definition errors. */
14101 else
14103 }
14105 /* After processing and defining all the values of an enumeration type,
14106 install their decls in the enumeration type.
14107 ENUMTYPE is the type object. */
14109 void
14111 {
14112 tree values;
14113 tree underlying_type;
14114 tree decl;
14115 tree value;
14117 tree t;
14119 bool fixed_underlying_type_p
14122 /* We built up the VALUES in reverse order. */
14125 /* For an enum defined in a template, just set the type of the values;
14126 all further processing is postponed until the template is
14127 instantiated. We need to set the type so that tsubst of a CONST_DECL
14128 works. */
14130 {
14132 values;
14136 }
14138 /* Determine the minimum and maximum values of the enumerators. */
14140 {
14144 values;
14146 {
14149 /* [dcl.enum]: Following the closing brace of an enum-specifier,
14150 each enumerator has the type of its enumeration. Prior to the
14151 closing brace, the type of each enumerator is the type of its
14152 initializing value. */
14155 /* Update the minimum and maximum values, if appropriate. */
14159 /* Figure out what the minimum and maximum values of the
14160 enumerators are. */
14167 }
14168 }
14169 else
14170 /* [dcl.enum]
14172 If the enumerator-list is empty, the underlying type is as if
14173 the enumeration had a single enumerator with value 0. */
14177 {
14178 /* Compute the number of bits require to represent all values of the
14179 enumeration. We must do this before the type of MINNODE and
14180 MAXNODE are transformed, since tree_int_cst_min_precision relies
14181 on the TREE_TYPE of the value it is passed. */
14189 /* Determine the underlying type of the enumeration.
14191 [dcl.enum]
14193 The underlying type of an enumeration is an integral type that
14194 can represent all the enumerator values defined in the
14195 enumeration. It is implementation-defined which integral type is
14196 used as the underlying type for an enumeration except that the
14197 underlying type shall not be larger than int unless the value of
14198 an enumerator cannot fit in an int or unsigned int.
14200 We use "int" or an "unsigned int" as the underlying type, even if
14201 a smaller integral type would work, unless the user has
14202 explicitly requested that we use the smallest possible type. The
14203 user can request that for all enumerations with a command line
14204 flag, or for just one enumeration with an attribute. */
14206 use_short_enum = flag_short_enums
14209 /* If the precision of the type was specified with an attribute and it
14210 was too small, give an error. Otherwise, use it. */
14212 {
14215 else
14216 {
14219 }
14220 }
14224 itk++)
14225 {
14231 }
14233 {
14234 /* DR 377
14236 IF no integral type can represent all the enumerator values, the
14237 enumeration is ill-formed. */
14242 }
14244 /* [dcl.enum]
14246 The value of sizeof() applied to an enumeration type, an object
14247 of an enumeration type, or an enumerator, is the value of sizeof()
14248 applied to the underlying type. */
14251 /* Compute the minimum and maximum values for the type.
14253 [dcl.enum]
14255 For an enumeration where emin is the smallest enumerator and emax
14256 is the largest, the values of the enumeration are the values of the
14257 underlying type in the range bmin to bmax, where bmin and bmax are,
14258 respectively, the smallest and largest values of the smallest bit-
14259 field that can store emin and emax. */
14261 /* The middle-end currently assumes that types with TYPE_PRECISION
14262 narrower than their underlying type are suitably zero or sign
14263 extended to fill their mode. Similarly, it assumes that the front
14264 end assures that a value of a particular type must be within
14265 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
14267 We used to set these fields based on bmin and bmax, but that led
14268 to invalid assumptions like optimizing away bounds checking. So
14269 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
14270 TYPE_MAX_VALUE to the values for the mode above and only restrict
14271 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
14275 set_min_and_max_values_for_integral_type
14278 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
14281 }
14282 else
14285 /* Convert each of the enumerators to the type of the underlying
14286 type of the enumeration. */
14288 {
14289 location_t saved_location;
14295 /* If the enumeration type has a fixed underlying type, we
14296 already checked all of the enumerator values. */
14298 else
14301 tf_warning_or_error);
14304 /* Do not clobber shared ints. */
14306 {
14310 }
14312 }
14314 /* Fix up all variant types of this enum type. */
14321 {
14323 /* TYPE_FIELDS needs fixup. */
14325 }
14327 /* Finish debugging output for this type. */
14330 /* Each enumerator now has the type of its enumeration. Clear the cache
14331 so that this change in types doesn't confuse us later on. */
14333 }
14335 /* Finishes the enum type. This is called only the first time an
14336 enumeration is seen, be it opaque or odinary.
14337 ENUMTYPE is the type object. */
14339 void
14341 {
14343 {
14347 }
14349 /* If this is a forward declaration, there should not be any variants,
14350 though we can get a variant in the middle of an enum-specifier with
14351 wacky code like 'enum E { e = sizeof(const E*) };' */
14355 }
14357 /* Build and install a CONST_DECL for an enumeration constant of the
14358 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
14359 Apply ATTRIBUTES if available. LOC is the location of NAME.
14360 Assignment of sequential values by default is handled here. */
14362 void
14364 location_t loc)
14365 {
14366 tree decl;
14367 tree context;
14368 tree type;
14370 /* scalar_constant_value will pull out this expression, so make sure
14371 it's folded as appropriate. */
14375 /* If the VALUE was erroneous, pretend it wasn't there; that will
14376 result in the enum being assigned the next value in sequence. */
14380 /* Remove no-op casts from the value. */
14385 {
14386 /* Validate and default VALUE. */
14388 {
14390 {
14395 }
14398 value = perform_implicit_conversion_flags
14406 {
14409 {
14413 }
14414 else
14415 {
14419 {
14423 }
14424 }
14425 }
14426 }
14428 /* Default based on previous value. */
14430 {
14432 {
14433 tree prev_value;
14436 /* C++03 7.2/4: If no initializer is specified for the first
14437 enumerator, the type is an unspecified integral
14438 type. Otherwise the type is the same as the type of the
14439 initializing value of the preceding enumerator unless the
14440 incremented value is not representable in that type, in
14441 which case the type is an unspecified integral type
14442 sufficient to contain the incremented value. */
14446 else
14447 {
14453 {
14456 {
14459 {
14465 }
14472 }
14475 else
14477 }
14480 {
14483 }
14484 }
14485 }
14486 else
14488 }
14490 /* Remove no-op casts from the value. */
14493 /* If the underlying type of the enum is fixed, check whether
14494 the enumerator values fits in the underlying type. If it
14495 does not fit, the program is ill-formed [C++0x dcl.enum]. */
14497 && value
14499 {
14504 /* Convert the value to the appropriate type. */
14506 }
14507 }
14509 /* C++ associates enums with global, function, or class declarations. */
14512 /* Build the actual enumeration constant. Note that the enumeration
14513 constants have the underlying type of the enum (if it is fixed)
14514 or the type of their initializer (if the underlying type of the
14515 enum is not fixed):
14517 [ C++0x dcl.enum ]
14519 If the underlying type is fixed, the type of each enumerator
14520 prior to the closing brace is the underlying type; if the
14521 initializing value of an enumerator cannot be represented by
14522 the underlying type, the program is ill-formed. If the
14523 underlying type is not fixed, the type of each enumerator is
14524 the type of its initializing value.
14526 If the underlying type is not fixed, it will be computed by
14527 finish_enum and we will reset the type of this enumerator. Of
14528 course, if we're processing a template, there may be no value. */
14542 {
14543 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
14544 on the TYPE_FIELDS list for `S'. (That's so that you can say
14545 things like `S::i' later.) */
14547 /* The enumerator may be getting declared outside of its enclosing
14548 class, like so:
14550 class S { public: enum E : int; }; enum S::E : int { i = 7; };
14552 For which case we need to make sure that the access of `S::i'
14553 matches the access of `S::E'. */
14559 else
14565 }
14566 else
14569 /* Add this enumeration constant to the list for this type. */
14571 }
14573 /* Look for an enumerator with the given NAME within the enumeration
14574 type ENUMTYPE. This routine is used primarily for qualified name
14575 lookup into an enumerator in C++0x, e.g.,
14577 enum class Color { Red, Green, Blue };
14579 Color color = Color::Red;
14581 Returns the value corresponding to the enumerator, or
14582 NULL_TREE if no such enumerator was found. */
14583 tree
14585 {
14586 tree e;
14591 }
14593 \f
14594 /* We're defining DECL. Make sure that its type is OK. */
14596 static void
14598 {
14602 /* In a function definition, arg types must be complete. */
14609 {
14614 /* Make it return void instead. */
14617 void_type_node,
14619 else
14621 fntype
14624 fntype = (cp_build_type_attribute_variant
14627 }
14628 else
14629 {
14633 }
14634 }
14636 /* True iff FN is an implicitly-defined default constructor. */
14638 static bool
14640 {
14644 }
14646 /* Clobber the contents of *this to let the back end know that the object
14647 storage is dead when we enter the constructor or leave the destructor. */
14649 static tree
14651 {
14652 /* Clobbering an empty base is pointless, and harmful if its one byte
14653 TYPE_SIZE overlays real data. */
14657 /* If we have virtual bases, clobber the whole object, but only if we're in
14658 charge. If we don't have virtual bases, clobber the as-base type so we
14659 don't mess with tail padding. */
14671 {
14674 }
14681 }
14683 /* Create the FUNCTION_DECL for a function definition.
14684 DECLSPECS and DECLARATOR are the parts of the declaration;
14685 they describe the function's name and the type it returns,
14686 but twisted together in a fashion that parallels the syntax of C.
14688 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
14689 DECLARATOR is really the DECL for the function we are about to
14690 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
14691 indicating that the function is an inline defined in-class.
14693 This function creates a binding context for the function body
14694 as well as setting up the FUNCTION_DECL in current_function_decl.
14696 For C++, we must first check whether that datum makes any sense.
14697 For example, "class A local_a(1,2);" means that variable local_a
14698 is an aggregate of type A, which should have a constructor
14699 applied to it with the argument list [1, 2].
14701 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
14702 or may be a BLOCK if the function has been defined previously
14703 in this translation unit. On exit, DECL_INITIAL (decl1) will be
14704 error_mark_node if the function has never been defined, or
14705 a BLOCK if the function has been defined somewhere. */
14707 bool
14709 {
14711 tree fntype;
14712 tree restype;
14715 tree current_function_parms;
14720 /* Sanity check. */
14728 /* ISO C++ 11.4/5. A friend function defined in a class is in
14729 the (lexical) scope of the class in which it is defined. */
14731 {
14734 /* CTYPE could be null here if we're dealing with a template;
14735 for example, `inline friend float foo()' inside a template
14736 will have no CTYPE set. */
14739 else
14741 }
14748 /* Handle gnu_inline attribute. */
14750 {
14755 }
14758 /* This is a constructor, we must ensure that any default args
14759 introduced by this definition are propagated to the clones
14760 now. The clones are used directly in overload resolution. */
14763 /* Sometimes we don't notice that a function is a static member, and
14764 build a METHOD_TYPE for it. Fix that up now. */
14768 /* Set up current_class_type, and enter the scope of the class, if
14769 appropriate. */
14775 /* Now that we have entered the scope of the class, we must restore
14776 the bindings for any template parameters surrounding DECL1, if it
14777 is an inline member template. (Order is important; consider the
14778 case where a template parameter has the same name as a field of
14779 the class.) It is not until after this point that
14780 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
14784 /* Effective C++ rule 15. */
14790 /* Make the init_value nonzero so pushdecl knows this is not tentative.
14791 error_mark_node is replaced below (in poplevel) with the BLOCK. */
14795 /* This function exists in static storage.
14796 (This does not mean `static' in the C sense!) */
14799 /* We must call push_template_decl after current_class_type is set
14800 up. (If we are processing inline definitions after exiting a
14801 class scope, current_class_type will be NULL_TREE until set above
14802 by push_nested_class.) */
14804 {
14807 {
14811 }
14813 }
14815 /* Make sure the parameter and return types are reasonable. When
14816 you declare a function, these types can be incomplete, but they
14817 must be complete when you define the function. */
14820 /* Build the return declaration for the function. */
14824 {
14825 tree resdecl;
14833 }
14835 /* Record the decl so that the function name is defined.
14836 If we already have a decl for this name, and it is a FUNCTION_DECL,
14837 use the old decl. */
14839 {
14840 /* A specialization is not used to guide overload resolution. */
14844 {
14848 /* If something went wrong when registering the declaration,
14849 use DECL1; we have to have a FUNCTION_DECL to use when
14850 parsing the body of the function. */
14851 ;
14852 else
14853 {
14854 /* Otherwise, OLDDECL is either a previous declaration
14855 of the same function or DECL1 itself. */
14862 {
14863 tree context;
14865 /* Check whether DECL1 is in an anonymous
14866 namespace. */
14868 context;
14870 {
14874 }
14878 OPT_Wmissing_declarations,
14880 }
14883 }
14884 }
14885 else
14886 {
14887 /* We need to set the DECL_CONTEXT. */
14890 }
14894 /* If #pragma weak applies, mark the decl appropriately now.
14895 The pragma only applies to global functions. Because
14896 determining whether or not the #pragma applies involves
14897 computing the mangled name for the declaration, we cannot
14898 apply the pragma until after we have merged this declaration
14899 with any previous declarations; if the original declaration
14900 has a linkage specification, that specification applies to
14901 the definition as well, and may affect the mangled name. */
14904 }
14906 /* We are now in the scope of the function being defined. */
14909 /* Save the parm names or decls from this function's declarator
14910 where store_parm_decls will find them. */
14913 /* Let the user know we're compiling this function. */
14918 /* This function may already have been parsed, in which case just
14919 return; our caller will skip over the body without parsing. */
14923 /* Initialize RTL machinery. We cannot do this until
14924 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
14925 even when processing a template; this is how we get
14926 CFUN set up, and our per-function variables initialized.
14927 FIXME factor out the non-RTL stuff. */
14931 /* Initialize the language data structures. Whenever we start
14932 a new function, we destroy temporaries in the usual way. */
14938 {
14941 }
14943 /* Start the statement-tree, start the tree now. */
14946 /* If we are (erroneously) defining a function that we have already
14947 defined before, wipe out what we knew before. */
14952 {
14953 /* We know that this was set up by `grokclassfn'. We do not
14954 wait until `store_parm_decls', since evil parse errors may
14955 never get us to that point. Here we keep the consistency
14956 between `current_class_type' and `current_class_ptr'. */
14962 cp_function_chain->x_current_class_ref
14964 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
14967 /* Constructors and destructors need to know whether they're "in
14968 charge" of initializing virtual base classes. */
14971 {
14974 }
14976 {
14979 }
14980 }
14983 /* Implicitly-defined methods (like the
14984 destructor for a class in which no destructor
14985 is explicitly declared) must not be defined
14986 until their definition is needed. So, we
14987 ignore interface specifications for
14988 compiler-generated functions. */
14994 {
15001 /* This is a function in a local class in an extern inline
15002 or template function. */
15004 }
15005 /* If this function belongs to an interface, it is public.
15006 If it belongs to someone else's interface, it is also external.
15007 This only affects inlines and template instantiations. */
15009 {
15012 {
15016 && ! flag_implement_inlines
15019 /* For WIN32 we also want to put these in linkonce sections. */
15021 }
15022 else
15025 /* If this function is in an interface implemented in this file,
15026 make sure that the back end knows to emit this function
15027 here. */
15030 }
15033 {
15034 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
15035 interface, we will have both finfo->interface_unknown and
15036 finfo->interface_only set. In that case, we don't want to
15037 use the normal heuristics because someone will supply a
15038 #pragma implementation elsewhere, and deducing it here would
15039 produce a conflict. */
15044 }
15045 else
15046 {
15047 /* This is a definition, not a reference.
15048 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
15056 else
15058 }
15060 /* Determine the ELF visibility attribute for the function. We must not
15061 do this before calling "pushdecl", as we must allow "duplicate_decls"
15062 to merge any attributes appropriately. We also need to wait until
15063 linkage is set. */
15077 {
15080 }
15090 /* Clobbering an empty base is harmful if it overlays real data. */
15092 /* We can't clobber safely for an implicitly-defined default constructor
15093 because part of the initialization might happen before we enter the
15094 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
15108 }
15111 /* Like start_preparsed_function, except that instead of a
15112 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
15114 Returns true on success. If the DECLARATOR is not suitable
15115 for a function, we return false, which tells the parser to
15116 skip the entire function. */
15118 bool
15121 tree attrs)
15122 {
15123 tree decl1;
15129 /* If the declarator is not suitable for a function definition,
15130 cause a syntax error. */
15132 {
15135 }
15138 /* main must return int. grokfndecl should have corrected it
15139 (and issued a diagnostic) if the user got it wrong. */
15141 integer_type_node));
15144 }
15145 \f
15146 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
15147 FN. */
15149 static bool
15151 {
15153 && !processing_template_decl
15155 /* We insert the EH_SPEC_BLOCK only in the original
15156 function; then, it is copied automatically to the
15157 clones. */
15159 /* Implicitly-generated constructors and destructors have
15160 exception specifications. However, those specifications
15161 are the union of the possible exceptions specified by the
15162 constructors/destructors for bases and members, so no
15163 unallowed exception will ever reach this function. By
15164 not creating the EH_SPEC_BLOCK we save a little memory,
15165 and we avoid spurious warnings about unreachable
15166 code. */
15168 }
15170 /* Store the parameter declarations into the current function declaration.
15171 This is called after parsing the parameter declarations, before
15172 digesting the body of the function.
15174 Also install to binding contour return value identifier, if any. */
15176 static void
15178 {
15180 tree parm;
15182 /* This is a chain of any other decls that came in among the parm
15183 declarations. If a parm is declared with enum {foo, bar} x;
15184 then CONST_DECLs for foo and bar are put here. */
15188 {
15189 /* This case is when the function was defined with an ANSI prototype.
15190 The parms already have decls, so we need not do anything here
15191 except record them as in effect
15192 and complain if any redundant old-style parm decls were written. */
15195 tree next;
15197 /* Must clear this because it might contain TYPE_DECLs declared
15198 at class level. */
15201 /* If we're doing semantic analysis, then we'll call pushdecl
15202 for each of these. We must do them in reverse order so that
15203 they end in the correct forward order. */
15207 {
15211 else
15212 {
15213 /* If we find an enum constant or a type tag,
15214 put it aside for the moment. */
15217 }
15218 }
15220 /* Get the decls in their original chain order and record in the
15221 function. This is all and only the PARM_DECLs that were
15222 pushed into scope by the loop above. */
15224 }
15225 else
15228 /* Now store the final chain of decls for the arguments
15229 as the decl-chain of the current lexical scope.
15230 Put the enumerators in as well, at the front so that
15231 DECL_ARGUMENTS is not modified. */
15236 }
15238 \f
15239 /* We have finished doing semantic analysis on DECL, but have not yet
15240 generated RTL for its body. Save away our current state, so that
15241 when we want to generate RTL later we know what to do. */
15243 static void
15245 {
15248 /* Save the language-specific per-function data so that we can
15249 get it back when we really expand this function. */
15252 /* Make a copy. */
15257 /* Clear out the bits we don't need. */
15262 }
15265 /* Set the return value of the constructor (if present). */
15267 static void
15269 {
15270 tree val;
15271 tree exprstmt;
15274 {
15275 /* Any return from a constructor will end up here. */
15281 /* Return the address of the object. */
15284 }
15285 }
15287 /* Do all the processing for the beginning of a destructor; set up the
15288 vtable pointers and cleanups for bases and members. */
15290 static void
15292 {
15293 tree compound_stmt;
15295 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
15296 issued an error message. We still want to try to process the
15297 body of the function, but initialize_vtbl_ptrs will crash if
15298 TYPE_BINFO is NULL. */
15300 {
15302 /* Make all virtual function table pointers in non-virtual base
15303 classes point to CURRENT_CLASS_TYPE's virtual function
15304 tables. */
15309 /* Clobbering an empty base is harmful if it overlays real data. */
15313 /* And insert cleanups for our bases and members so that they
15314 will be properly destroyed if we throw. */
15316 }
15317 }
15319 /* At the end of every destructor we generate code to delete the object if
15320 necessary. Do that now. */
15322 static void
15324 {
15325 tree exprstmt;
15327 /* Any return from a destructor will end up here; that way all base
15328 and member cleanups will be run when the function returns. */
15332 {
15333 tree val;
15338 /* Return the address of the object. */
15341 }
15342 }
15344 /* Do the necessary processing for the beginning of a function body, which
15345 in this case includes member-initializers, but not the catch clauses of
15346 a function-try-block. Currently, this means opening a binding level
15347 for the member-initializers (in a ctor), member cleanups (in a dtor),
15348 and capture proxies (in a lambda operator()). */
15350 tree
15352 {
15353 tree stmt;
15360 else
15361 /* Always keep the BLOCK node associated with the outermost pair of
15362 curly braces of a function. These are needed for correct
15363 operation of dwarfout.c. */
15374 }
15376 /* Do the processing for the end of a function body. Currently, this means
15377 closing out the cleanups for fully-constructed bases and members, and in
15378 the case of the destructor, deleting the object if desired. Again, this
15379 is only meaningful for [cd]tors, since they are the only functions where
15380 there is a significant distinction between the main body and any
15381 function catch clauses. Handling, say, main() return semantics here
15382 would be wrong, as flowing off the end of a function catch clause for
15383 main() would also need to return 0. */
15385 void
15387 {
15391 /* Close the block. */
15400 }
15402 /* Given a function, returns the BLOCK corresponding to the outermost level
15403 of curly braces, skipping the artificial block created for constructor
15404 initializers. */
15406 tree
15408 {
15418 }
15420 /* If FNDECL is a class's key method, add the class to the list of
15421 keyed classes that should be emitted. */
15423 static void
15425 {
15429 {
15433 }
15434 }
15436 /* Subroutine of finish_function.
15437 Save the body of constexpr functions for possible
15438 future compile time evaluation. */
15440 static void
15442 {
15448 }
15450 /* Finish up a function declaration and compile that function
15451 all the way to assembler language output. The free the storage
15452 for the function definition.
15454 FLAGS is a bitwise or of the following values:
15455 2 - INCLASS_INLINE
15456 We just finished processing the body of an in-class inline
15457 function definition. (This processing will have taken place
15458 after the class definition is complete.) */
15460 tree
15462 {
15467 /* When we get some parse errors, we can end up without a
15468 current_function_decl, so cope. */
15481 /* TREE_READONLY (fndecl) = 1;
15482 This caused &foo to be of type ptr-to-const-function
15483 which then got a warning when stored in a ptr-to-function variable. */
15486 /* The current function is being defined, so its DECL_INITIAL should
15487 be set, and unless there's a multiple definition, it should be
15488 error_mark_node. */
15491 /* For a cloned function, we've already got all the code we need;
15492 there's no need to add any extra bits. */
15494 {
15495 /* Make it so that `main' always returns 0 by default. */
15502 current_eh_spec_block);
15503 }
15505 /* If we're saving up tree structure, tie off the function now. */
15513 /* If this function can't throw any exceptions, remember that. */
15516 && !flag_non_call_exceptions
15520 /* This must come after expand_function_end because cleanups might
15521 have declarations (from inline functions) that need to go into
15522 this function's blocks. */
15524 /* If the current binding level isn't the outermost binding level
15525 for this function, either there is a bug, or we have experienced
15526 syntax errors and the statement tree is malformed. */
15528 {
15529 /* Make sure we have already experienced errors. */
15532 /* Throw away the broken statement tree and extra binding
15533 levels. */
15537 {
15540 else
15542 }
15543 }
15546 /* Statements should always be full-expressions at the outermost set
15547 of curly braces for a function. */
15550 /* If there are no return statements in a function with auto return type,
15551 the return type is void. But if the declared type is something like
15552 auto*, this is an error. */
15555 {
15557 {
15560 }
15563 {
15565 current_function_auto_return_pattern);
15568 }
15569 }
15571 // If this is a concept, check that the definition is reasonable.
15575 /* Lambda closure members are implicitly constexpr if possible. */
15579 = ((processing_template_decl
15583 /* Save constexpr function body before it gets munged by
15584 the NRV transformation. */
15587 /* Invoke the pre-genericize plugin before we start munging things. */
15591 /* Perform delayed folding before NRV transformation. */
15595 /* Set up the named return value optimization, if we can. Candidate
15596 variables are selected in check_return_expr. */
15598 {
15600 tree outer;
15603 /* This is only worth doing for fns that return in memory--and
15604 simpler, since we don't have to worry about promoted modes. */
15606 /* Only allow this for variables declared in the outer scope of
15607 the function so we know that their lifetime always ends with a
15608 return; see g++.dg/opt/nrv6.C. We could be more flexible if
15609 we were to do this optimization in tree-ssa. */
15615 }
15617 /* Remember that we were in class scope. */
15621 /* Must mark the RESULT_DECL as being in this function. */
15624 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
15625 to the FUNCTION_DECL node itself. */
15628 /* Save away current state, if appropriate. */
15632 /* Complain if there's just no return statement. */
15637 /* Don't complain if we abort or throw. */
15638 && !current_function_returns_abnormally
15639 /* Don't complain if there's an infinite loop. */
15640 && !current_function_infinite_loop
15641 /* Don't complain if we are declared noreturn. */
15645 /* Structor return values (if any) are set by the compiler. */
15649 {
15653 }
15655 /* Store the end of the function, so that we get good line number
15656 info for the epilogue. */
15659 /* Complain about parameters that are only set, but never otherwise used. */
15661 && !processing_template_decl
15664 {
15665 tree decl;
15668 decl;
15682 OPT_Wunused_but_set_parameter,
15685 }
15687 /* Complain about locally defined typedefs that are not used in this
15688 function. */
15691 /* Possibly warn about unused parameters. */
15693 && !processing_template_decl
15697 /* Genericize before inlining. */
15699 {
15702 /* Clear out the bits we don't need. */
15712 }
15713 /* Clear out the bits we don't need. */
15716 /* We're leaving the context of this function, so zap cfun. It's still in
15717 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
15721 /* If this is an in-class inline definition, we may have to pop the
15722 bindings for the template parameters that we added in
15723 maybe_begin_member_template_processing when start_function was
15724 called. */
15728 /* Leave the scope of the class. */
15734 /* Clean up. */
15739 }
15740 \f
15741 /* Create the FUNCTION_DECL for a function definition.
15742 DECLSPECS and DECLARATOR are the parts of the declaration;
15743 they describe the return type and the name of the function,
15744 but twisted together in a fashion that parallels the syntax of C.
15746 This function creates a binding context for the function body
15747 as well as setting up the FUNCTION_DECL in current_function_decl.
15749 Returns a FUNCTION_DECL on success.
15751 If the DECLARATOR is not suitable for a function (it defines a datum
15752 instead), we return 0, which tells yyparse to report a parse error.
15754 May return void_type_node indicating that this method is actually
15755 a friend. See grokfield for more details.
15757 Came here with a `.pushlevel' .
15759 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
15760 CHANGES TO CODE IN `grokfield'. */
15762 tree
15765 {
15773 {
15776 }
15781 /* Pass friends other than inline friend functions back. */
15786 {
15791 }
15800 /* We process method specializations in finish_struct_1. */
15802 {
15806 }
15809 {
15811 {
15814 }
15815 }
15821 }
15822 \f
15824 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
15825 we can lay it out later, when and if its type becomes complete.
15827 Also handle constexpr variables where the initializer involves
15828 an unlowered PTRMEM_CST because the class isn't complete yet. */
15830 void
15832 {
15835 /* Keep track of variables with incomplete types. */
15838 {
15846 /* RTTI TD entries are created while defining the type_info. */
15849 {
15852 }
15856 {
15857 /* When the outermost open class is complete we can resolve any
15858 pointers-to-members. */
15862 }
15863 }
15864 }
15866 /* Called when a class type (given by TYPE) is defined. If there are
15867 any existing VAR_DECLs whose type has been completed by this
15868 declaration, update them now. */
15870 void
15872 {
15877 {
15879 {
15886 {
15887 /* Complete the type of the variable. The VAR_DECL itself
15888 will be laid out in expand_expr. */
15891 }
15893 /* Remove this entry from the list. */
15895 }
15896 else
15897 ix++;
15898 }
15900 /* Check for pending declarations which may have abstract type. */
15902 }
15904 /* If DECL is of a type which needs a cleanup, build and return an
15905 expression to perform that cleanup here. Return NULL_TREE if no
15906 cleanup need be done. DECL can also be a _REF when called from
15907 split_nonconstant_init_1. */
15909 tree
15911 {
15912 tree type;
15913 tree attr;
15914 tree cleanup;
15916 /* Assume no cleanup is required. */
15922 /* Handle "__attribute__((cleanup))". We run the cleanup function
15923 before the destructor since the destructor is what actually
15924 terminates the lifetime of the object. */
15927 else
15930 {
15931 tree id;
15932 tree fn;
15933 tree arg;
15935 /* Get the name specified by the user for the cleanup function. */
15937 /* Look up the name to find the cleanup function to call. It is
15938 important to use lookup_name here because that is what is
15939 used in c-common.c:handle_cleanup_attribute when performing
15940 initial checks on the attribute. Note that those checks
15941 include ensuring that the function found is not an overloaded
15942 function, or an object with an overloaded call operator,
15943 etc.; we can rely on the fact that the function found is an
15944 ordinary FUNCTION_DECL. */
15952 }
15953 /* Handle ordinary C++ destructors. */
15956 {
15958 tree addr;
15959 tree call;
15963 else
15974 else
15976 }
15978 /* build_delete sets the location of the destructor call to the
15979 current location, even though the destructor is going to be
15980 called later, at the end of the current scope. This can lead to
15981 a "jumpy" behavior for users of debuggers when they step around
15982 the end of the block. So let's unset the location of the
15983 destructor call instead. */
15989 /* Treat objects with destructors as used; the destructor may do
15990 something substantive. */
15995 }
15997 \f
15998 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
15999 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
16000 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
16002 tree
16004 {
16005 tree fntype;
16006 tree args;
16020 fntype = (cp_build_type_attribute_variant
16022 fntype = (build_exception_variant
16027 }
16029 /* DECL was originally constructed as a non-static member function,
16030 but turned out to be static. Update it accordingly. */
16032 void
16034 {
16047 }
16049 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
16050 one of the language-independent trees. */
16052 enum cp_tree_node_structure_enum
16054 {
16056 {
16073 }
16074 }
16076 /* Build the void_list_node (void_type_node having been created). */
16077 tree
16079 {
16082 }
16084 bool
16086 {
16087 /* A missing noreturn is ok for the `main' function. */
16089 }
16091 /* Return the decl used to identify the COMDAT group into which DECL should
16092 be placed. */
16094 tree
16096 {
16097 /* Virtual tables, construction virtual tables, and virtual table
16098 tables all go in a single COMDAT group, named after the primary
16099 virtual table. */
16102 /* For all other DECLs, the COMDAT group is the mangled name of the
16103 declaration itself. */
16104 else
16105 {
16107 {
16108 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
16109 into the same section as the target function. In that case
16110 we must return target's name. */
16116 else
16118 }
16119 }
16122 }
16124 /* Returns the return type for FN as written by the user, which may include
16125 a placeholder for a deduced return type. */
16127 tree
16129 {
16132 {
16139 }
16141 }
16143 /* Returns true iff DECL was declared with an auto type and it has
16144 not yet been deduced to a real type. */
16146 bool
16148 {
16152 }
16154 /* Complain if DECL has an undeduced return type. */
16156 bool
16158 {
16160 {
16164 }
16166 }