| blob | 99b22dc878c4a1525c48483f1fbf2f4bf5c89eef |
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. */
55 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_FIELD /* field */
61 };
97 static tree check_special_function_return_type
105 /* The following symbols are subsumed in the cp_global_trees array, and
106 listed here individually for documentation purposes.
108 C++ extensions
109 tree wchar_decl_node;
111 tree vtable_entry_type;
112 tree delta_type_node;
113 tree __t_desc_type_node;
115 tree class_type_node;
116 tree unknown_type_node;
118 Array type `vtable_entry_type[]'
120 tree vtbl_type_node;
121 tree vtbl_ptr_type_node;
123 Namespaces,
125 tree std_node;
126 tree abi_node;
128 A FUNCTION_DECL which can call `abort'. Not necessarily the
129 one that the user will declare, but sufficient to be called
130 by routines that want to abort the program.
132 tree abort_fndecl;
134 Used by RTTI
135 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
136 tree tinfo_var_id; */
140 #define local_names cp_function_chain->x_local_names
142 /* A list of objects which have constructors or destructors
143 which reside in the global scope. The decl is stored in
144 the TREE_VALUE slot and the initializer is stored
145 in the TREE_PURPOSE slot. */
146 tree static_aggregates;
148 /* Like static_aggregates, but for thread_local variables. */
149 tree tls_aggregates;
151 /* -- end of C++ */
153 /* A node for the integer constant 2. */
155 tree integer_two_node;
157 /* vector of static decls. */
160 /* vector of keyed classes. */
163 /* Used only for jumps to as-yet undefined labels, since jumps to
164 defined labels can have their validity checked immediately. */
168 /* The binding level to which this entry is *currently* attached.
169 This is initially the binding level in which the goto appeared,
170 but is modified as scopes are closed. */
172 /* The head of the names list that was current when the goto appeared,
173 or the inner scope popped. These are the decls that will *not* be
174 skipped when jumping to the label. */
175 tree names_in_scope;
176 /* The location of the goto, for error reporting. */
177 location_t o_goto_locus;
178 /* True if an OpenMP structured block scope has been closed since
179 the goto appeared. This means that the branch from the label will
180 illegally exit an OpenMP scope. */
182 };
184 /* A list of all LABEL_DECLs in the function that have names. Here so
185 we can clear out their names' definitions at the end of the
186 function, and so we can check the validity of jumps to these labels. */
196 /* The binding level to which the label is *currently* attached.
197 This is initially set to the binding level in which the label
198 is defined, but is modified as scopes are closed. */
201 /* The head of the names list that was current when the label was
202 defined, or the inner scope popped. These are the decls that will
203 be skipped when jumping to the label. */
204 tree names_in_scope;
206 /* A vector of all decls from all binding levels that would be
207 crossed by a backward branch to the label. */
210 /* A list of uses of the label, before the label is defined. */
213 /* The following bits are set after the label is defined, and are
214 updated as scopes are popped. They indicate that a jump to the
215 label will illegally enter a scope of the given flavor. */
221 };
223 #define named_labels cp_function_chain->x_named_labels
224 \f
225 /* The number of function bodies which we are currently processing.
226 (Zero if we are at namespace scope, one inside the body of a
227 function, two inside the body of a function in a local class, etc.) */
230 /* Whether the exception-specifier is part of a function type (i.e. C++17). */
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
236 deprecated items. */
239 \f
240 /* A list of VAR_DECLs whose type was incomplete at the time the
241 variable was declared. */
244 tree decl;
245 tree incomplete_type;
246 };
250 \f
251 /* Returns the kind of template specialization we are currently
252 processing, given that it's declaration contained N_CLASS_SCOPES
253 explicit scope qualifications. */
255 tmpl_spec_kind
257 {
263 /* Scan through the template parameter scopes. */
267 {
268 /* If we see a specialization scope inside a parameter scope,
269 then something is wrong. That corresponds to a declaration
270 like:
272 template <class T> template <> ...
274 which is always invalid since [temp.expl.spec] forbids the
275 specialization of a class member template if the enclosing
276 class templates are not explicitly specialized as well. */
278 {
281 else
283 }
288 }
290 /* Handle explicit instantiations. */
292 {
294 /* We've seen a template parameter list during an explicit
295 instantiation. For example:
297 template <class T> template void f(int);
299 This is erroneous. */
301 else
303 }
306 /* We've not seen enough template headers to match all the
307 specialized classes present. For example:
309 template <class T> void R<T>::S<T>::f(int);
311 This is invalid; there needs to be one set of template
312 parameters for each class. */
315 /* We're processing a non-template declaration (even though it may
316 be a member of a template class.) For example:
318 template <class T> void S<T>::f(int);
320 The `class T' matches the `S<T>', leaving no template headers
321 corresponding to the `f'. */
324 /* We've got too many template headers. For example:
326 template <> template <class T> void f (T);
328 There need to be more enclosing classes. */
330 else
331 /* This must be a template. It's of the form:
333 template <class T> template <class U> void S<T>::f(U);
335 This is a specialization if the innermost level was a
336 specialization; otherwise it's just a definition of the
337 template. */
339 }
341 /* Exit the current scope. */
343 void
345 {
347 }
349 /* When a label goes out of scope, check to see if that label was used
350 in a valid manner, and issue any appropriate warnings or errors. */
352 static void
354 {
356 {
358 {
359 location_t location;
363 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
364 /* Avoid crashing later. */
366 }
367 else
369 }
370 }
372 /* Helper function to sort named label entries in a vector by DECL_UID. */
374 static int
376 {
380 /* DECL_UIDs can never be equal. */
382 }
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
386 function. */
388 static void
390 {
394 /* We need to add the labels to the block chain, so debug
395 information is emitted. But, we want the order to be stable so
396 need to sort them first. Otherwise the debug output could be
397 randomly ordered. I guess it's mostly stable, unless the hash
398 table implementation changes. */
403 {
410 }
415 {
422 }
423 }
425 /* At the end of a block with local labels, restore the outer definition. */
427 static void
429 {
437 else
438 {
441 }
443 }
445 /* The following two routines are used to interface to Objective-C++.
446 The binding level is purposely treated as an opaque type. */
450 {
452 }
454 /* The following routine is used by the NeXT-style SJLJ exceptions;
455 variables get marked 'volatile' so as to not be clobbered by
456 _setjmp()/_longjmp() calls. All variables in the current scope,
457 as well as parent scopes up to (but not including) ENCLOSING_BLK
458 shall be thusly marked. */
460 void
462 {
468 {
469 tree decl;
474 /* Do not climb up past the current function. */
477 }
478 }
480 /* True if B is the level for the condition of a constexpr if. */
482 static bool
484 {
488 }
490 /* Update data for defined and undefined labels when leaving a scope. */
492 int
494 {
499 {
500 tree decl;
502 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
503 TREE_LISTs representing OVERLOADs, so be careful. */
513 {
532 }
533 }
535 {
540 {
545 }
546 }
549 }
551 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
552 when errors were reported, except for -Werror-unused-but-set-*. */
555 /* Exit a binding level.
556 Pop the level off, and restore the state of the identifier-decl mappings
557 that were in effect when this level was entered.
559 If KEEP == 1, this level had explicit declarations, so
560 and create a "block" (a BLOCK node) for the level
561 to record its declarations and subblocks for symbol table output.
563 If FUNCTIONBODY is nonzero, this level is the body of a function,
564 so create a block as if KEEP were set and also clear out all
565 label names.
567 If REVERSE is nonzero, reverse the order of decls before putting
568 them into the BLOCK. */
570 tree
572 {
573 tree link;
574 /* The chain of decls was accumulated in reverse order.
575 Put it into forward order, just for cleanliness. */
576 tree decls;
577 tree subblocks;
578 tree block;
579 tree decl;
581 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. */
618 {
621 }
623 /* If there were any declarations or structure tags in that level,
624 or if this level is a function body,
625 create a BLOCK to record them for the life of this function. */
627 /* Avoid function body block if possible. */
633 {
636 }
638 /* In each subblock, record that this is its superior. */
643 /* We still support the old for-scope rules, whereby the variables
644 in a init statement were in scope after the for-statement ended.
645 We only use the new rules if flag_new_for_scope is nonzero. */
646 leaving_for_scope
649 /* Before we remove the declarations first check for unused variables. */
654 {
655 /* There are cases where D itself is a TREE_LIST. See in
656 push_local_binding where the list of decls returned by
657 getdecls is built. */
664 /* For structured bindings, consider only real variables, not
665 subobjects. */
673 {
675 {
678 OPT_Wunused_variable,
680 else
683 }
685 // For -Wunused-but-set-variable leave references alone.
688 {
693 else
695 OPT_Wunused_but_set_variable,
698 }
699 }
700 }
702 /* Remove declarations for all the DECLs in this level. */
704 {
709 /* It's hard to make this ARM compatibility hack play nicely with
710 lambdas, and it really isn't necessary in C++11 mode. */
713 {
722 /* We have something like:
724 int i;
725 for (int i; ;);
727 and we are leaving the `for' scope. There's no reason to
728 keep the binding of the inner `i' in this case. */
729 ;
732 /* Here, we have something like:
734 typedef int I;
736 void f () {
737 for (int I; ;);
738 }
740 We must pop the for-scope binding so we know what's a
741 type and what isn't. */
742 ;
743 else
744 {
745 /* Mark this VAR_DECL as dead so that we can tell we left it
746 there only for backward compatibility. */
749 /* Keep track of what should have happened when we
750 popped the binding. */
752 {
755 }
757 /* Add it to the list of dead variables in the next
758 outermost binding to that we can remove these when we
759 leave that binding. */
762 link);
764 /* Although we don't pop the cxx_binding, we do clear
765 its SCOPE since the scope is going away now. */
769 /* Don't remove the binding. */
771 }
772 }
773 /* Remove the binding. */
776 else
778 }
780 /* Remove declarations for any `for' variables from inner scopes
781 that we kept around. */
786 /* Restore the IDENTIFIER_TYPE_VALUEs. */
791 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
792 list if a `using' declaration put them there. The debugging
793 back ends won't understand OVERLOAD, so we remove them here.
794 Because the BLOCK_VARS are (temporarily) shared with
795 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
796 popped all the bindings. Also remove undeduced 'auto' decls,
797 which LTO doesn't understand, and can't have been used by anything. */
799 {
803 {
805 || (!processing_template_decl
808 else
810 }
811 }
813 /* If the level being exited is the top level of a function,
814 check over all the labels. */
816 {
818 {
819 /* Since this is the top level block of a function, the vars are
820 the function's parameters. Don't leave them in the BLOCK
821 because they are found in the FUNCTION_DECL instead. */
824 }
825 else
827 }
831 {
832 tree stmt;
834 /* If this is a temporary binding created for a cleanup, then we'll
835 have pushed a statement list level. Pop that, create a new
836 BIND_EXPR for the block, and insert it into the stream. */
840 }
844 {
845 /* The current function is being defined, so its DECL_INITIAL
846 should be error_mark_node. */
850 {
852 {
855 }
856 else
858 }
859 }
861 current_binding_level->blocks
864 /* If we did not make a block for the level just exited,
865 any blocks made for inner levels
866 (since they cannot be recorded as subblocks in that level)
867 must be carried forward so they will later become subblocks
868 of something else. */
870 current_binding_level->blocks
873 /* Each and every BLOCK node created here in `poplevel' is important
874 (e.g. for proper debugging information) so if we created one
875 earlier, mark it as "used". */
879 /* All temporary bindings created for cleanups are popped silently. */
885 }
887 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
888 /* Diagnose odr-used extern inline variables without definitions
889 in the current TU. */
891 int
893 {
895 {
896 tree decl;
899 {
909 OPT_Wunused_function,
918 }
920 /* Clear out the list, so we don't rescan next time. */
923 /* Write out any globals that need to be output. */
926 }
928 }
929 \f
930 /* In C++, you don't have to write `struct S' to refer to `S'; you
931 can just use `S'. We accomplish this by creating a TYPE_DECL as
932 if the user had written `typedef struct S S'. Create and return
933 the TYPE_DECL for TYPE. */
935 tree
937 {
938 tree decl;
942 /* There are other implicit type declarations, like the one *within*
943 a class that allows you to write `S::S'. We must distinguish
944 amongst these. */
950 }
952 /* Remember a local name for name-mangling purposes. */
954 static void
956 {
966 {
969 {
974 else
980 }
981 }
985 }
986 \f
987 /* Subroutine of duplicate_decls: return truthvalue of whether
988 or not types of these decls match.
990 For C++, we must compare the parameter list so that `int' can match
991 `int&' in a parameter position, but `int&' is not confused with
992 `const int&'. */
994 int
996 {
1003 /* If the two DECLs are not even the same kind of thing, we're not
1004 interested in their types. */
1010 {
1015 tree r2;
1017 /* Specializations of different templates are different functions
1018 even if they have the same type. */
1033 /* A new declaration doesn't match a built-in one unless it
1034 is also extern "C". */
1042 /* A declaration with deduced return type should use its pre-deduction
1043 type for declaration matching. */
1047 {
1050 #ifndef NO_IMPLICIT_EXTERN_C
1053 #endif
1054 ))
1055 {
1059 }
1060 #ifndef NO_IMPLICIT_EXTERN_C
1068 {
1071 }
1072 #endif
1073 else
1074 types_match =
1080 }
1081 else
1084 /* The decls dont match if they correspond to two different versions
1085 of the same function. Disallow extern "C" functions to be
1086 versions for now. */
1090 && record_versions
1093 }
1095 {
1109 else
1110 // We don't need to check equivalently_constrained for variable and
1111 // function templates because we check it on the results.
1113 }
1114 else
1115 {
1116 /* Need to check scope for variable declaration (VAR_DECL).
1117 For typedef (TYPE_DECL), scope is ignored. */
1120 /* [dcl.link]
1121 Two declarations for an object with C language linkage
1122 with the same name (ignoring the namespace that qualify
1123 it) that appear in different namespace scopes refer to
1124 the same object. */
1134 else
1137 COMPARE_REDECLARATION);
1138 }
1140 // Normal functions can be constrained, as can variable partial
1141 // specializations.
1146 }
1148 /* NEWDECL and OLDDECL have identical signatures. If they are
1149 different versions adjust them and return true. */
1151 bool
1153 {
1160 {
1165 }
1168 {
1173 }
1175 /* Only record if at least one was not already versions. */
1180 }
1182 /* If NEWDECL is `static' and an `extern' was seen previously,
1183 warn about it. OLDDECL is the previous declaration.
1185 Note that this does not apply to the C++ case of declaring
1186 a variable `extern const' and then later `const'.
1188 Don't complain about built-in functions, since they are beyond
1189 the user's control. */
1191 void
1193 {
1200 /* Don't get confused by static member functions; that's a different
1201 use of `static'. */
1206 /* If the old declaration was `static', or the new one isn't, then
1207 everything is OK. */
1211 /* It's OK to declare a builtin function as `static'. */
1220 }
1222 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1223 function templates. If their exception specifications do not
1224 match, issue a diagnostic. */
1226 static void
1228 tree old_decl)
1229 {
1233 /* Two default specs are equivalent, don't force evaluation. */
1243 /* [except.spec]
1245 If any declaration of a function has an exception-specification,
1246 all declarations, including the definition and an explicit
1247 specialization, of that function shall have an
1248 exception-specification with the same set of type-ids. */
1251 {
1259 /* We used to silently permit mismatched eh specs with
1260 -fno-exceptions, so make them a pedwarn now. */
1262 else
1267 }
1268 }
1270 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1271 Otherwise issue diagnostics. */
1273 static bool
1275 {
1285 {
1287 {
1288 /* Hide a built-in declaration. */
1292 }
1293 /* 7.1.5 [dcl.constexpr]
1294 Note: An explicit specialization can differ from the template
1295 declaration with respect to the constexpr specifier. */
1301 "redeclaration %qD differs in %<constexpr%> "
1306 }
1308 }
1310 // If OLDDECL and NEWDECL are concept declarations with the same type
1311 // (i.e., and template parameters), but different requirements,
1312 // emit diagnostics and return true. Otherwise, return false.
1315 {
1327 {
1332 {
1335 }
1336 }
1338 }
1340 /* DECL is a redeclaration of a function or function template. If
1341 it does have default arguments issue a diagnostic. Note: this
1342 function is used to enforce the requirements in C++11 8.3.6 about
1343 no default arguments in redeclarations. */
1345 static void
1347 {
1353 {
1355 "redeclaration of %q#D may not have default "
1358 }
1359 }
1361 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1363 DECL_ATTRIBUTES (fn)))
1365 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1366 If the redeclaration is invalid, a diagnostic is issued, and the
1367 error_mark_node is returned. Otherwise, OLDDECL is returned.
1369 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1370 returned.
1372 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1374 tree
1376 {
1380 tree new_template_info;
1387 /* If either the type of the new decl or the type of the old decl is an
1388 error_mark_node, then that implies that we have already issued an
1389 error (earlier) for some bogus type specification, and in that case,
1390 it is rather pointless to harass the user with yet more error message
1391 about the same declaration, so just pretend the types match here. */
1398 {
1409 }
1415 {
1419 else
1422 }
1424 /* Check for redeclaration and other discrepancies. */
1427 {
1430 {
1431 /* Avoid warnings redeclaring built-ins which have not been
1432 explicitly declared. */
1434 {
1438 OPT_Wbuiltin_declaration_mismatch,
1440 newdecl);
1442 }
1444 /* If you declare a built-in or predefined function name as static,
1445 the old definition is overridden, but optionally warn this was a
1446 bad choice of name. */
1448 {
1453 /* Discard the old built-in function. */
1455 }
1456 /* If the built-in is not ansi, then programs can override
1457 it even globally without an error. */
1462 else
1466 }
1468 {
1475 }
1477 {
1478 /* Avoid warnings redeclaring built-ins which have not been
1479 explicitly declared. */
1481 {
1484 /* A new declaration doesn't match a built-in one unless it
1485 is also extern "C". */
1495 {
1498 /* FILE, tm types are not known at the time
1499 we create the builtins. */
1505 {
1512 {
1520 newdecl_is_friend);
1522 }
1524 }
1528 next_arg:;
1529 }
1532 OPT_Wbuiltin_declaration_mismatch,
1533 "declaration of %q#D conflicts with built-in "
1535 }
1540 {
1541 /* A near match; override the builtin. */
1545 OPT_Wbuiltin_declaration_mismatch,
1546 "new declaration %q#D ambiguates built-in "
1548 else
1553 }
1554 else
1555 /* Discard the old built-in function. */
1558 /* Replace the old RTL to avoid problems with inlining. */
1560 }
1561 /* Even if the types match, prefer the new declarations type for
1562 built-ins which have not been explicitly declared, for
1563 exception lists, etc... */
1565 {
1572 }
1574 /* If a function is explicitly declared "throw ()", propagate that to
1575 the corresponding builtin. */
1580 {
1585 }
1587 /* Whether or not the builtin can throw exceptions has no
1588 bearing on this declarator. */
1592 {
1593 /* If a builtin function is redeclared as `static', merge
1594 the declarations, but make the original one static. */
1598 /* Make the old declaration consistent with the new one so
1599 that all remnants of the builtin-ness of this function
1600 will be banished. */
1603 }
1604 }
1606 {
1607 /* C++ Standard, 3.3, clause 4:
1608 "[Note: a namespace name or a class template name must be unique
1609 in its declarative region (7.3.2, clause 14). ]" */
1616 {
1621 {
1622 /* We do nothing special here, because C++ does such nasty
1623 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1624 get shadowed, and know that if we need to find a TYPE_DECL
1625 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1626 slot of the identifier. */
1628 }
1635 }
1644 }
1646 {
1648 /* These are certainly not duplicate declarations; they're
1649 from different scopes. */
1653 {
1654 /* The name of a class template may not be declared to refer to
1655 any other template, class, function, object, namespace, value,
1656 or type in the same scope. */
1659 {
1664 }
1671 /* Template functions can be disambiguated by
1672 return type. */
1675 // Template functions can also be disambiguated by
1676 // constraints.
1678 {
1682 }
1686 }
1688 {
1690 {
1692 newdecl);
1696 }
1697 /* For function versions, params and types match, but they
1698 are not ambiguous. */
1701 // The functions have the same parameter types.
1704 // And the same constraints.
1706 {
1711 }
1712 else
1714 }
1715 else
1716 {
1721 }
1722 }
1732 /* It's OK to have a template specialization and a non-template
1733 with the same type, or to have specializations of two
1734 different templates with the same type. Note that if one is a
1735 specialization, and the other is an instantiation of the same
1736 template, that we do not exit at this point. That situation
1737 can occur if we instantiate a template class, and then
1738 specialize one of its methods. This situation is valid, but
1739 the declarations must be merged in the usual way. */
1746 /* One of the declarations is a template instantiation, and the
1747 other is not a template at all. That's OK. */
1750 {
1751 /* In [namespace.alias] we have:
1753 In a declarative region, a namespace-alias-definition can be
1754 used to redefine a namespace-alias declared in that declarative
1755 region to refer only to the namespace to which it already
1756 refers.
1758 Therefore, if we encounter a second alias directive for the same
1759 alias, we can just ignore the second directive. */
1765 /* Leave it to update_binding to merge or report error. */
1767 }
1768 else
1769 {
1772 {
1780 }
1785 {
1786 /* Prototype decl follows defn w/o prototype. */
1791 }
1794 {
1795 /* [dcl.link]
1796 If two declarations of the same function or object
1797 specify different linkage-specifications ..., the program
1798 is ill-formed.... Except for functions with C++ linkage,
1799 a function declaration without a linkage specification
1800 shall not precede the first linkage specification for
1801 that function. A function can be declared without a
1802 linkage specification after an explicit linkage
1803 specification has been seen; the linkage explicitly
1804 specified in the earlier declaration is not affected by
1805 such a function declaration.
1807 DR 563 raises the question why the restrictions on
1808 functions should not also apply to objects. Older
1809 versions of G++ silently ignore the linkage-specification
1810 for this example:
1812 namespace N {
1813 extern int i;
1814 extern "C" int i;
1815 }
1817 which is clearly wrong. Therefore, we now treat objects
1818 like functions. */
1820 {
1821 /* There is no explicit linkage-specification, so we use
1822 the linkage from the previous declaration. */
1825 }
1826 else
1827 {
1833 }
1834 }
1837 ;
1839 {
1840 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1843 as FUNCTION_DECLs. */
1845 /* C++11 8.3.6/6.
1846 Default arguments for a member function of a class
1847 template shall be specified on the initial declaration
1848 of the member function within the class template. */
1851 else
1852 {
1860 {
1863 {
1865 "default argument given for parameter "
1869 olddecl);
1870 }
1871 else
1872 {
1877 olddecl);
1878 }
1879 }
1880 }
1881 }
1882 }
1884 /* Do not merge an implicit typedef with an explicit one. In:
1886 class A;
1887 ...
1888 typedef class A A __attribute__ ((foo));
1890 the attribute should apply only to the typedef. */
1896 /* If new decl is `static' and an `extern' was seen previously,
1897 warn about it. */
1903 /* We have committed to returning 1 at this point. */
1905 {
1906 /* Now that functions must hold information normally held
1907 by field decls, there is extra work to do so that
1908 declaration information does not get destroyed during
1909 definition. */
1927 /* Optionally warn about more than one declaration for the same
1928 name, but don't warn about a function declaration followed by a
1929 definition. */
1932 /* Don't warn about extern decl followed by definition. */
1934 /* Don't warn about friends, let add_friend take care of it. */
1936 /* Don't warn about declaration followed by specialization. */
1939 {
1941 OPT_Wredundant_decls,
1943 newdecl))
1946 }
1950 {
1952 {
1956 }
1958 }
1959 }
1961 /* Deal with C++: must preserve virtual function table size. */
1963 {
1973 }
1975 /* Copy all the DECL_... slots specified in the new decl
1976 except for any that we copy here from the old type. */
1981 {
1987 {
1990 }
1991 }
1994 {
1995 tree old_result;
1996 tree new_result;
2008 {
2009 /* Per C++11 8.3.6/4, default arguments cannot be added in later
2010 declarations of a function template. */
2019 {
2022 else
2034 }
2035 else
2036 {
2042 }
2043 }
2045 /* If the new declaration is a definition, update the file and
2046 line information on the declaration, and also make
2047 the old declaration the same definition. */
2049 {
2055 {
2056 tree parm;
2062 }
2063 }
2066 }
2069 {
2073 /* Automatically handles default parameters. */
2075 tree newtype;
2077 /* For typedefs use the old type, as the new type's DECL_NAME points
2078 at newdecl, which will be ggc_freed. */
2080 {
2081 /* But NEWTYPE might have an attribute, honor that. */
2086 {
2090 }
2092 /* And remove the new type from the variants list. */
2094 {
2099 {
2102 }
2103 }
2104 }
2105 else
2106 /* Merge the data types specified in the two decls. */
2110 {
2112 /* For already initialized vars, TREE_READONLY could have been
2113 cleared in cp_finish_decl, because the var needs runtime
2114 initialization or destruction. Make sure not to set
2115 TREE_READONLY on it again. */
2129 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2132 {
2133 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2136 }
2137 }
2139 /* An explicit specialization of a function template or of a member
2140 function of a class template can be declared transaction_safe
2141 independently of whether the corresponding template entity is declared
2142 transaction_safe. */
2155 /* Lay the type out, unless already done. */
2169 /* Merge the type qualifiers. */
2177 /* Merge deprecatedness. */
2181 /* Preserve function specific target and optimization options */
2183 {
2193 }
2195 /* Merge the initialization information. */
2198 {
2202 {
2205 }
2206 }
2209 {
2221 /* Keep the old RTL. */
2223 }
2226 {
2227 /* Keep the old RTL. We cannot keep the old RTL if the old
2228 declaration was for an incomplete object and the new
2229 declaration is not since many attributes of the RTL will
2230 change. */
2232 }
2233 }
2234 /* If cannot merge, then use the new type and qualifiers,
2235 and don't preserve the old rtl. */
2236 else
2237 {
2238 /* Clean out any memory we had of the old declaration. */
2248 }
2250 /* Merge the storage class information. */
2263 {
2272 {
2279 }
2282 {
2286 }
2291 /* If the OLDDECL is an instantiation and/or specialization,
2292 then the NEWDECL must be too. But, it may not yet be marked
2293 as such if the caller has created NEWDECL, but has not yet
2294 figured out that it is a redeclaration. */
2298 /* Don't really know how much of the language-specific
2299 values we should copy from old to new. */
2306 {
2310 {
2314 /* Remember the presence of explicit specialization args. */
2317 }
2319 }
2320 /* Only functions have these fields. */
2322 {
2327 /* DECL_THUNKS is only valid for virtual functions,
2328 otherwise it is a DECL_FRIEND_CONTEXT. */
2331 }
2332 /* Only variables have this field. */
2336 }
2339 {
2340 tree parm;
2342 /* Merge parameter attributes. */
2351 }
2355 {
2356 /* If newdecl is not a specialization, then it is not a
2357 template-related function at all. And that means that we
2358 should have exited above, returning 0. */
2362 /* From [temp.expl.spec]:
2364 If a template, a member template or the member of a class
2365 template is explicitly specialized then that
2366 specialization shall be declared before the first use of
2367 that specialization that would cause an implicit
2368 instantiation to take place, in every translation unit in
2369 which such a use occurs. */
2371 olddecl);
2377 /* Don't propagate visibility from the template to the
2378 specialization here. We'll do that in determine_visibility if
2379 appropriate. */
2382 /* [temp.expl.spec/14] We don't inline explicit specialization
2383 just because the primary template says so. */
2385 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2386 the always_inline attribute. */
2389 {
2392 else
2396 }
2397 }
2399 {
2400 /* Never inline re-defined extern inline functions.
2401 FIXME: this could be better handled by keeping both
2402 function as separate declarations. */
2404 }
2405 else
2406 {
2408 {
2412 }
2414 ;
2428 }
2430 /* Preserve abstractness on cloned [cd]tors. */
2433 /* Update newdecl's parms to point at olddecl. */
2439 {
2443 }
2445 {
2446 /* These need to be copied so that the names are available.
2447 Note that if the types do match, we'll preserve inline
2448 info and other bits, but if not, we won't. */
2451 }
2452 /* If redeclaring a builtin function, it stays built in
2453 if newdecl is a gnu_inline definition, or if newdecl is just
2454 a declaration. */
2457 {
2460 /* If we're keeping the built-in definition, keep the rtl,
2461 regardless of declaration matches. */
2464 {
2467 {
2468 /* If a compatible prototype of these builtin functions
2469 is seen, assume the runtime implements it with the
2470 expected semantics. */
2479 }
2480 }
2483 }
2485 /* If defining a function declared with other language
2486 linkage, use the previously declared language linkage. */
2489 {
2491 /* Don't clear out the arguments if we're just redeclaring a
2492 function. */
2495 }
2496 }
2500 /* Now preserve various other info from the definition. */
2506 /* Warn about conflicting visibility specifications. */
2510 {
2512 "%qD: visibility attribute ignored because it "
2516 }
2517 /* Choose the declaration which specified visibility. */
2519 {
2522 }
2523 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2524 so keep this behavior. */
2526 {
2529 }
2530 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2532 {
2535 }
2544 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2545 with that from NEWDECL below. */
2547 {
2551 }
2553 /* Merge the USED information. */
2559 {
2564 }
2570 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2571 to olddecl and deleted. */
2574 {
2575 /* Set the flag for newdecl so that it gets copied to olddecl. */
2577 /* newdecl will be purged after copying to olddecl and is no longer
2578 a version. */
2580 }
2583 {
2597 /* Preserve symtab node mapping. */
2601 /* If newdecl is a template instantiation, it is possible that
2602 the following sequence of events has occurred:
2604 o A friend function was declared in a class template. The
2605 class template was instantiated.
2607 o The instantiation of the friend declaration was
2608 recorded on the instantiation list, and is newdecl.
2610 o Later, however, instantiate_class_template called pushdecl
2611 on the newdecl to perform name injection. But, pushdecl in
2612 turn called duplicate_decls when it discovered that another
2613 declaration of a global function with the same name already
2614 existed.
2616 o Here, in duplicate_decls, we decided to clobber newdecl.
2618 If we're going to do that, we'd better make sure that
2619 olddecl, and not newdecl, is on the list of
2620 instantiations so that if we try to do the instantiation
2621 again we won't get the clobbered declaration. */
2623 new_template_info,
2624 olddecl);
2625 }
2626 else
2627 {
2634 {
2642 {
2655 }
2663 }
2664 }
2667 {
2671 {
2672 /* Merge the section attribute.
2673 We want to issue an error if the sections conflict but that must be
2674 done later in decl_attributes since we are called before attributes
2675 are assigned. */
2680 {
2684 else
2688 }
2689 }
2693 {
2697 }
2698 }
2704 {
2707 }
2709 /* NEWDECL contains the merged attribute lists.
2710 Update OLDDECL to be the same. */
2713 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2714 so that encode_section_info has a chance to look at the new decl
2715 flags and attributes. */
2722 /* The NEWDECL will no longer be needed. Because every out-of-class
2723 declaration of a member results in a call to duplicate_decls,
2724 freeing these nodes represents in a significant savings.
2726 Before releasing the node, be sore to remove function from symbol
2727 table that might have been inserted there to record comdat group.
2728 Be sure to however do not free DECL_STRUCT_FUNCTION because this
2729 structure is shared in between newdecl and oldecl. */
2733 {
2737 }
2739 /* Remove the associated constraints for newdecl, if any, before
2740 reclaiming memory. */
2747 }
2748 \f
2749 /* Return zero if the declaration NEWDECL is valid
2750 when the declaration OLDDECL (assumed to be for the same name)
2751 has already been seen.
2752 Otherwise return an error message format string with a %s
2753 where the identifier should go. */
2757 {
2759 {
2760 /* Because C++ can put things into name space for free,
2761 constructs like "typedef struct foo { ... } foo"
2762 would look like an erroneous redeclaration. */
2765 else
2767 }
2769 {
2770 /* If this is a pure function, its olddecl will actually be
2771 the original initialization to `0' (which we force to call
2772 abort()). Don't complain about redefinition in this case. */
2777 /* If both functions come from different namespaces, this is not
2778 a redeclaration - this is a conflict with a used function. */
2784 /* We'll complain about linkage mismatches in
2785 warn_extern_redeclared_static. */
2787 /* Defining the same name twice is no good. */
2790 {
2796 }
2799 {
2804 {
2808 else
2811 }
2812 }
2814 check_abi_tag_redeclaration
2819 }
2821 {
2825 {
2830 }
2848 {
2853 {
2857 else
2860 }
2861 }
2863 /* Core issue #226 (C++0x):
2865 If a friend function template declaration specifies a
2866 default template-argument, that declaration shall be a
2867 definition and shall be the only declaration of the
2868 function template in the translation unit. */
2879 }
2885 {
2886 /* Only variables can be thread-local, and all declarations must
2887 agree on this property. */
2891 else
2894 }
2896 {
2897 /* The objects have been declared at namespace scope. If either
2898 is a member of an anonymous union, then this is an invalid
2899 redeclaration. For example:
2901 int i;
2902 union { int i; };
2904 is invalid. */
2908 /* If at least one declaration is a reference, there is no
2909 conflict. For example:
2911 int i = 3;
2912 extern int i;
2914 is valid. */
2918 /* Static data member declared outside a class definition
2919 if the variable is defined within the class with constexpr
2920 specifier is declaration rather than definition (and
2921 deprecated). */
2926 {
2928 /* For now, only warn with explicit -Wdeprecated. */
2931 "redundant redeclaration of %<constexpr%> static "
2936 }
2938 /* Reject two definitions. */
2940 }
2941 else
2942 {
2943 /* Objects declared with block scope: */
2944 /* Reject two definitions, and reject a definition
2945 together with an external reference. */
2949 }
2950 }
2951 \f
2953 /* Hash and equality functions for the named_label table. */
2955 hashval_t
2957 {
2959 }
2961 bool
2963 {
2965 }
2967 /* Look for a label named ID in the current function. If one cannot
2968 be found, create one. Return the named_label_entry, or NULL on
2969 failure. */
2973 {
2974 /* You can't use labels at global scope. */
2976 {
2979 }
2985 named_label_entry **slot
2990 {
2995 {
2999 }
3000 }
3002 /* We are making a new decl, create or reuse the named_label_entry */
3006 else
3007 {
3012 }
3014 /* Now create the LABEL_DECL. */
3020 {
3024 }
3029 }
3031 /* Wrapper for lookup_label_1. */
3033 tree
3035 {
3040 }
3042 tree
3044 {
3049 }
3051 /* Returns nonzero if it is ill-formed to jump past the declaration of
3052 DECL. Returns 2 if it's also a real problem. */
3054 static int
3056 {
3057 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
3058 with automatic storage duration is not in scope to a point where it is
3059 in scope is ill-formed unless the variable has scalar type, class type
3060 with a trivial default constructor and a trivial destructor, a
3061 cv-qualified version of one of these types, or an array of one of the
3062 preceding types and is declared without an initializer (8.5). */
3077 }
3079 /* A subroutine of check_previous_goto_1 and check_goto to identify a branch
3080 to the user. */
3082 static bool
3084 diagnostic_t diag_kind)
3085 {
3086 bool complained
3093 }
3095 /* Check that a single previously seen jump to a newly defined label
3096 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
3097 the jump context; NAMES are the names in scope in LEVEL at the jump
3098 context; LOCUS is the source position of the jump or 0. Returns
3099 true if all is well. */
3101 static bool
3104 {
3111 {
3117 }
3120 {
3126 {
3132 {
3134 DK_PERMERROR);
3136 }
3138 {
3142 else
3144 " enters scope of %q#D, which has "
3146 }
3147 }
3155 {
3182 {
3186 }
3191 }
3194 {
3200 }
3201 }
3204 }
3206 static void
3208 {
3212 }
3214 static bool
3216 {
3218 }
3220 /* Check that a new jump to a label DECL is OK. Called by
3221 finish_goto_stmt. */
3223 void
3225 {
3226 /* We can't know where a computed goto is jumping.
3227 So we assume that it's OK. */
3231 /* We didn't record any information about this label when we created it,
3232 and there's not much point since it's trivial to analyze as a return. */
3237 named_label_entry **slot
3241 /* If the label hasn't been defined yet, defer checking. */
3243 {
3244 /* Don't bother creating another use if the last goto had the
3245 same data, and will therefore create the same set of errors. */
3250 named_label_use_entry *new_use
3260 }
3264 tree bad;
3270 {
3278 }
3281 {
3285 {
3286 /* Can't skip init of __exception_info. */
3288 {
3292 }
3296 }
3298 {
3302 else
3304 " enters scope of %q#D which has "
3306 }
3307 }
3310 {
3319 }
3322 {
3325 }
3328 {
3332 {
3334 {
3339 }
3343 }
3344 }
3345 }
3347 /* Check that a return is ok wrt OpenMP structured blocks.
3348 Called by finish_return_stmt. Returns true if all is well. */
3350 bool
3352 {
3355 {
3358 }
3362 }
3364 /* Define a label, specifying the location in the source file.
3365 Return the LABEL_DECL node for the label. */
3367 static tree
3369 {
3370 /* After labels, make any new cleanups in the function go into their
3371 own new (temporary) binding contour. */
3381 {
3384 }
3385 else
3386 {
3387 /* Mark label as having been defined. */
3389 /* Say where in the source. */
3398 }
3401 }
3403 /* Wrapper for define_label_1. */
3405 tree
3407 {
3412 }
3415 struct cp_switch
3416 {
3419 /* The SWITCH_STMT being built. */
3420 tree switch_stmt;
3421 /* A splay-tree mapping the low element of a case range to the high
3422 element, or NULL_TREE if there is no high element. Used to
3423 determine whether or not a new case label duplicates an old case
3424 label. We need a tree, rather than simply a hash table, because
3425 of the GNU case range extension. */
3426 splay_tree cases;
3427 /* Remember whether there was a case value that is outside the
3428 range of the original type of the controlling expression. */
3430 /* Remember whether a default: case label has been seen. */
3432 /* Remember whether a BREAK_STMT has been seen in this SWITCH_STMT. */
3434 /* Set if inside of {FOR,DO,WHILE}_BODY nested inside of a switch,
3435 where BREAK_STMT doesn't belong to the SWITCH_STMT. */
3437 };
3439 /* A stack of the currently active switch statements. The innermost
3440 switch statement is on the top of the stack. There is no need to
3441 mark the stack for garbage collection because it is only active
3442 during the processing of the body of a function, and we never
3443 collect at that point. */
3447 /* Called right after a switch-statement condition is parsed.
3448 SWITCH_STMT is the switch statement being parsed. */
3450 void
3452 {
3463 }
3465 void
3467 {
3469 location_t switch_location;
3471 /* Emit warnings as needed. */
3473 const bool bool_cond_p
3482 /* For the benefit of block_may_fallthru remember if the switch body
3483 case labels cover all possible values and if there are break; stmts. */
3485 || (!processing_template_decl
3495 }
3497 /* Note that a BREAK_STMT is about to be added. If it is inside of
3498 a SWITCH_STMT and not inside of a loop body inside of it, note
3499 in switch_stack we've seen a BREAK_STMT. */
3501 void
3503 {
3506 }
3508 /* Note the start of processing of an iteration statement's body.
3509 The note_break_stmt function will do nothing while processing it.
3510 Return a flag that should be passed to note_iteration_stmt_body_end. */
3512 bool
3514 {
3520 }
3522 /* Note the end of processing of an iteration statement's body. */
3524 void
3526 {
3529 }
3531 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3532 condition. Note that if TYPE and VALUE are already integral we don't
3533 really do the conversion because the language-independent
3534 warning/optimization code will work better that way. */
3536 static tree
3538 {
3545 {
3548 value = (perform_implicit_conversion_flags
3551 }
3553 }
3555 /* Note that we've seen a definition of a case label, and complain if this
3556 is a bad place for one. */
3558 tree
3560 {
3563 tree type;
3569 {
3570 tree label;
3572 /* For templates, just add the case label; we'll do semantic
3573 analysis at instantiation-time. */
3576 }
3578 /* Find the condition on which this switch statement depends. */
3595 /* After labels, make any new cleanups in the function go into their
3596 own new (temporary) binding contour. */
3603 }
3604 \f
3606 tree scope;
3607 tree name;
3608 tree template_id;
3611 };
3614 {
3617 /* Hash a TYPENAME_TYPE. */
3619 static hashval_t
3621 {
3622 hashval_t hash;
3628 }
3630 /* Compare two TYPENAME_TYPEs. */
3632 static bool
3634 {
3640 }
3641 };
3643 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3644 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3646 Returns the new TYPENAME_TYPE. */
3650 tree
3653 {
3654 tree t;
3655 tree d;
3656 typename_info ti;
3658 hashval_t hash;
3673 /* See if we already have this type. */
3677 else
3678 {
3679 /* Build the TYPENAME_TYPE. */
3686 /* Build the corresponding TYPE_DECL. */
3693 /* Store it in the hash table. */
3696 /* TYPENAME_TYPEs must always be compared structurally, because
3697 they may or may not resolve down to another type depending on
3698 the currently open classes. */
3700 }
3703 }
3705 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3706 provided to name the type. Returns an appropriate type, unless an
3707 error occurs, in which case error_mark_node is returned. If we
3708 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3709 return that, rather than the _TYPE it corresponds to, in other
3710 cases we look through the type decl. If TF_ERROR is set, complain
3711 about errors, otherwise be quiet. */
3713 tree
3715 tsubst_flags_t complain)
3716 {
3717 tree fullname;
3718 tree t;
3727 {
3732 else
3733 /* Create a TEMPLATE_ID_EXPR for the type. */
3737 }
3744 {
3749 {
3753 }
3754 }
3756 {
3760 }
3765 {
3769 }
3771 /* When the CONTEXT is a dependent type, NAME could refer to a
3772 dependent base class of CONTEXT. But look inside it anyway
3773 if CONTEXT is a currently open scope, in case it refers to a
3774 member of the current instantiation or a non-dependent base;
3775 lookup will stop when we hit a dependent base. */
3777 /* We should only set WANT_TYPE when we're a nested typename type.
3778 Then we can give better diagnostics if we find a non-type. */
3780 else
3789 {
3791 {
3794 else
3797 }
3799 }
3801 /* Pull out the template from an injected-class-name (or multiple). */
3806 {
3808 {
3811 }
3813 }
3816 {
3821 }
3823 {
3828 }
3833 /* If we are currently parsing a template and if T is a typedef accessed
3834 through CONTEXT then we need to remember and check access of T at
3835 template instantiation time. */
3850 }
3852 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3853 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3854 in which case error_mark_node is returned.
3856 If PARM_LIST is non-NULL, also make sure that the template parameter
3857 list of TEMPLATE_DECL matches.
3859 If COMPLAIN zero, don't complain about any errors that occur. */
3861 tree
3863 tsubst_flags_t complain)
3864 {
3865 tree t;
3866 tree d;
3876 {
3886 {
3890 }
3894 {
3896 {
3900 }
3902 }
3905 complain))
3909 }
3911 /* Build the UNBOUND_CLASS_TEMPLATE. */
3917 /* Build the corresponding TEMPLATE_DECL. */
3926 }
3928 \f
3930 /* Push the declarations of builtin types into the global namespace.
3931 RID_INDEX is the index of the builtin type in the array
3932 RID_POINTERS. NAME is the name used when looking up the builtin
3933 type. TYPE is the _TYPE node for the builtin type.
3935 The calls to set_global_binding below should be
3936 eliminated. Built-in types should not be looked up name; their
3937 names are keywords that the parser can recognize. However, there
3938 is code in c-common.c that uses identifier_global_value to look up
3939 built-in types by name. */
3941 void
3944 tree type)
3945 {
3949 {
3955 }
3960 {
3966 }
3969 {
3973 }
3974 }
3976 /* Push a type into the namespace so that the back ends ignore it. */
3978 static void
3980 {
3983 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3990 }
3992 /* Create all the predefined identifiers. */
3994 static void
3996 {
3997 struct predefined_identifier
3998 {
4002 };
4004 /* A table of identifiers to create at startup. */
4008 /* Some of these names have a trailing space so that it is
4009 impossible for them to conflict with names written by users. */
4026 /* The demangler expects anonymous namespaces to be called
4027 something starting with '_GLOBAL__N_'. It no longer needs
4028 to be unique to the TU. */
4034 };
4038 {
4040 /* Some of these identifiers already have a special kind. */
4043 }
4044 }
4046 /* Create the predefined scalar types of C,
4047 and some nodes representing standard constants (0, 1, (void *)0).
4048 Initialize the global binding level.
4049 Make definitions for built-in primitive functions. */
4051 void
4053 {
4054 tree void_ftype;
4055 tree void_ftype_ptr;
4057 /* Create all the identifiers we need. */
4060 /* Create the global variables. */
4065 /* Enter the global namespace. */
4068 void_type_node);
4072 /* Remember whether we want the empty class passing ABI change warning
4073 in this TU. */
4076 debug_hooks->register_main_translation_unit
4084 /* Initially, C. */
4087 /* Create the `std' namespace. */
4098 /* Guess at the initial static decls size. */
4101 /* ... and keyed classes. */
4113 NULL_TREE);
4115 #if 0
4117 #endif
4126 void_ftype_ptr
4129 /* Create the conversion operator marker. This operator's DECL_NAME
4130 is in the identifier table, so we can use identifier equality to
4131 find it. */
4133 void_ftype);
4135 /* C++ extensions */
4140 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
4143 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
4144 result. */
4151 {
4152 /* Make sure we get a unique function type, so we can give
4153 its pointer type a name. (This wins for gdb.) */
4160 }
4163 vtbl_type_node
4182 /* Now, C++. */
4187 {
4190 }
4196 {
4199 tree ptr_ftype_sizetype;
4200 tree new_eh_spec;
4202 ptr_ftype_sizetype
4205 {
4206 tree bad_alloc_id;
4207 tree bad_alloc_type_node;
4208 tree bad_alloc_decl;
4214 bad_alloc_decl
4219 new_eh_spec
4221 }
4222 else
4225 /* Ensure attribs.c is initialized. */
4228 /* Ensure constraint.cc is initialized. */
4232 NULL_TREE);
4235 extvisattr);
4249 {
4250 /* Also push the sized deallocation variants:
4251 void operator delete(void*, std::size_t) throw();
4252 void operator delete[](void*, std::size_t) throw(); */
4253 tree void_ftype_ptr_size
4257 extvisattr);
4261 }
4264 {
4271 /* operator new (size_t, align_val_t); */
4283 /* operator delete (void *, align_val_t); */
4292 {
4293 /* operator delete (void *, size_t, align_val_t); */
4296 NULL_TREE);
4301 }
4302 }
4314 }
4316 abort_fndecl
4320 /* Perform other language dependent initializations. */
4334 /* Show we use EH for cleanups. */
4337 }
4339 /* Generate an initializer for a function naming variable from
4340 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4341 filled in with the type of the init. */
4343 tree
4345 {
4347 tree type;
4352 {
4356 }
4365 else
4369 }
4371 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4372 the decl, LOC is the location to give the decl, NAME is the
4373 initialization string and TYPE_DEP indicates whether NAME depended
4374 on the type of the function. We make use of that to detect
4375 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4376 at the point of first use, so we mustn't push the decl now. */
4378 static tree
4380 {
4383 tree type;
4397 {
4401 LOOKUP_ONLYCONVERTING);
4402 }
4403 else
4404 {
4407 }
4410 }
4412 static tree
4414 {
4422 /* Runtime library routines are, by definition, available in an
4423 external shared object. */
4429 /* A function in the user's namespace should have an explicit
4430 declaration before it is used. Mark the built-in function as
4431 anticipated but not actually declared. */
4435 {
4438 /* Treat __*_chk fortification functions as anticipated as well,
4439 unless they are __builtin_*. */
4444 }
4448 else
4452 }
4454 tree
4456 {
4459 /* All builtins that don't begin with an '_' should additionally
4460 go in the 'std' namespace. */
4462 {
4467 }
4470 }
4472 /* Like cxx_builtin_function, but guarantee the function is added to the global
4473 scope. This is to allow function specific options to add new machine
4474 dependent builtins when the target ISA changes via attribute((target(...)))
4475 which saves space on program startup if the program does not use non-generic
4476 ISAs. */
4478 tree
4480 {
4484 /* All builtins that don't begin with an '_' should additionally
4485 go in the 'std' namespace. */
4487 {
4492 }
4495 }
4497 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4498 function. Not called directly. */
4500 static tree
4503 {
4511 /* Runtime library routines are, by definition, available in an
4512 external shared object. */
4517 }
4519 /* Returns the _DECL for a library function with C++ linkage. */
4521 static tree
4524 {
4529 }
4531 /* Like build_library_fn, but takes a C string instead of an
4532 IDENTIFIER_NODE. */
4534 tree
4536 {
4538 }
4540 /* Like build_cp_library_fn, but takes a C string instead of an
4541 IDENTIFIER_NODE. */
4543 tree
4545 {
4547 ecf_flags);
4548 }
4550 /* Like build_library_fn, but also pushes the function so that we will
4551 be able to find it via get_global_binding. Also, the function
4552 may throw exceptions listed in RAISES. */
4554 tree
4556 {
4557 tree fn;
4565 }
4567 /* Like build_cp_library_fn, but also pushes the function so that it
4568 will be found by normal lookup. */
4570 static tree
4573 {
4580 }
4582 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4583 a FUNCTION_TYPE. */
4585 tree
4587 {
4590 }
4592 /* Like push_library_fn, but also note that this function throws
4593 and does not return. Used for __throw_foo and the like. */
4595 tree
4597 {
4600 }
4601 \f
4602 /* When we call finish_struct for an anonymous union, we create
4603 default copy constructors and such. But, an anonymous union
4604 shouldn't have such things; this function undoes the damage to the
4605 anonymous union type T.
4607 (The reason that we create the synthesized methods is that we don't
4608 distinguish `union { int i; }' from `typedef union { int i; } U'.
4609 The first is an anonymous union; the second is just an ordinary
4610 union type.) */
4612 void
4614 {
4615 /* Wipe out memory of synthesized methods. */
4623 /* Splice the implicitly generated functions out of TYPE_FIELDS. */
4627 else
4630 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4631 assignment operators (because they cannot have these methods themselves).
4632 For anonymous unions this is already checked because they are not allowed
4633 in any union, otherwise we have to check it. */
4635 {
4640 {
4643 {
4653 }
4654 }
4655 }
4656 }
4658 /* Warn for an attribute located at LOCATION that appertains to the
4659 class type CLASS_TYPE that has not been properly placed after its
4660 class-key, in it class-specifier. */
4662 void
4664 tree class_type)
4665 {
4669 "attribute ignored in declaration "
4674 }
4676 /* Make sure that a declaration with no declarator is well-formed, i.e.
4677 just declares a tagged type or anonymous union.
4679 Returns the type declared; or NULL_TREE if none. */
4681 tree
4684 {
4687 /* If a class, struct, or enum type is declared by the DECLSPECS
4688 (i.e, if a class-specifier, enum-specifier, or non-typename
4689 elaborated-type-specifier appears in the DECLSPECS),
4690 DECLARED_TYPE is set to the corresponding type. */
4697 {
4703 }
4716 {
4718 "%<auto%> can only be specified for variables "
4721 }
4722 /* Check for an anonymous union. */
4725 {
4726 /* 7/3 In a simple-declaration, the optional init-declarator-list
4727 can be omitted only when declaring a class (clause 9) or
4728 enumeration (7.2), that is, when the decl-specifier-seq contains
4729 either a class-specifier, an elaborated-type-specifier with
4730 a class-key (9.1), or an enum-specifier. In these cases and
4731 whenever a class-specifier or enum-specifier is present in the
4732 decl-specifier-seq, the identifiers in these specifiers are among
4733 the names being declared by the declaration (as class-name,
4734 enum-names, or enumerators, depending on the syntax). In such
4735 cases, and except for the declaration of an unnamed bit-field (9.6),
4736 the decl-specifier-seq shall introduce one or more names into the
4737 program, or shall redeclare a name introduced by a previous
4738 declaration. [Example:
4739 enum { }; // ill-formed
4740 typedef class { }; // ill-formed
4741 --end example] */
4743 {
4746 }
4753 }
4755 else
4756 {
4764 && (!current_class_type
4773 "a storage class can only be specified for objects "
4777 "%<const%> can only be specified for objects and "
4781 "%<volatile%> can only be specified for objects and "
4785 "%<__restrict%> can only be specified for objects and "
4789 "%<__thread%> can only be specified for objects "
4797 }
4800 {
4801 location_t loc;
4804 /* For a non-template class, use the name location. */
4806 else
4807 /* For a template class (an explicit instantiation), use the
4808 current location. */
4812 /* [dcl.attr.grammar]/4:
4814 No attribute-specifier-seq shall appertain to an explicit
4815 instantiation. */
4816 {
4819 declared_type))
4821 "no attribute can be applied to "
4823 }
4824 else
4826 }
4829 }
4831 /* Called when a declaration is seen that contains no names to declare.
4832 If its type is a reference to a structure, union or enum inherited
4833 from a containing scope, shadow that tag name for the current scope
4834 with a forward reference.
4835 If its type defines a new named structure or union
4836 or defines an enum, it is valid but we need not do anything here.
4837 Otherwise, it is an error.
4839 C++: may have to grok the declspecs to learn about static,
4840 complain for anonymous unions.
4842 Returns the TYPE declared -- or NULL_TREE if none. */
4844 tree
4846 {
4856 /* This is where the variables in an anonymous union are
4857 declared. An anonymous union declaration looks like:
4858 union { ... } ;
4859 because there is no declarator after the union, the parser
4860 sends that declaration here. */
4862 {
4866 {
4870 }
4871 }
4874 }
4875 \f
4876 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4878 tree
4882 {
4883 tree attrs;
4884 tree type;
4885 enum decl_context context
4891 {
4896 /* A template type parameter or other dependent type. */
4899 else
4901 }
4903 }
4905 /* Process a DECLARATOR for a function-scope variable declaration,
4906 namespace-scope variable declaration, or function declaration.
4907 (Function definitions go through start_function; class member
4908 declarations appearing in the body of the class go through
4909 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4910 If an error occurs, the error_mark_node is returned instead.
4912 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4913 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4914 for an explicitly defaulted function, or SD_DELETED for an explicitly
4915 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4916 implicitly initialized via a default constructor. ATTRIBUTES and
4917 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4919 The scope represented by the context of the returned DECL is pushed
4920 (if it is not the global namespace) and is assigned to
4921 *PUSHED_SCOPE_P. The caller is then responsible for calling
4922 pop_scope on *PUSHED_SCOPE_P if it is set. */
4924 tree
4928 tree attributes,
4929 tree prefix_attributes,
4931 {
4932 tree decl;
4933 tree context;
4940 /* An object declared as __attribute__((deprecated)) suppresses
4941 warnings of uses of other deprecated items. */
4960 /* Is it valid for this decl to have an initializer at all?
4961 If not, set INITIALIZED to zero, which will indirectly
4962 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4965 {
4968 }
4971 {
4975 decl);
4979 }
4985 /* If this is a typedef that names the class for linkage purposes
4986 (7.1.3p8), apply any attributes directly to the type. */
4991 else
4994 /* Set attributes here so if duplicate decl, will have proper attributes. */
4997 /* Dllimported symbols cannot be defined. Static data members (which
4998 can be initialized in-class and dllimported) go through grokfield,
4999 not here, so we don't need to exclude those decls when checking for
5000 a definition. */
5002 {
5005 }
5007 /* If #pragma weak was used, mark the decl weak now. */
5019 {
5023 {
5029 {
5033 else
5034 {
5040 }
5041 }
5042 else
5043 {
5048 {
5055 }
5056 /* Static data member are tricky; an in-class initialization
5057 still doesn't provide a definition, so the in-class
5058 declaration will have DECL_EXTERNAL set, but will have an
5059 initialization. Thus, duplicate_decls won't warn
5060 about this situation, and so we check here. */
5069 }
5070 }
5071 else
5072 {
5074 this_tmpl
5075 ? current_template_parms
5081 }
5083 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
5085 /* Do not mark DECL as an explicit specialization if it was not
5086 already marked as an instantiation; a declaration should
5087 never be marked as a specialization unless we know what
5088 template is being specialized. */
5090 {
5095 else
5098 /* [temp.expl.spec] An explicit specialization of a static data
5099 member of a template is a definition if the declaration
5100 includes an initializer; otherwise, it is a declaration.
5102 We check for processing_specialization so this only applies
5103 to the new specialization syntax. */
5106 }
5109 /* Aliases are definitions. */
5112 decl);
5113 }
5117 /* Enter this declaration into the symbol table. Don't push the plain
5118 VAR_DECL for a variable template. */
5131 {
5132 /* This is a const variable with implicit 'static'. Set
5133 DECL_THIS_STATIC so we can tell it from variables that are
5134 !TREE_PUBLIC because of the anonymous namespace. */
5137 }
5141 {
5145 decl);
5148 else
5152 }
5158 }
5160 /* Process the declaration of a variable DECL. INITIALIZED is true
5161 iff DECL is explicitly initialized. (INITIALIZED is false if the
5162 variable is initialized via an implicitly-called constructor.)
5163 This function must be called for ordinary variables (including, for
5164 example, implicit instantiations of templates), but must not be
5165 called for template declarations. */
5167 void
5169 {
5170 tree type;
5185 /* If an explicit initializer is present, or if this is a definition
5186 of an aggregate, then we need a complete type at this point.
5187 (Scalars are always complete types, so there is nothing to
5188 check.) This code just sets COMPLETE_P; errors (if necessary)
5189 are issued below. */
5191 && !complete_p
5193 {
5195 /* We will not yet have set TREE_READONLY on DECL if the type
5196 was "const", but incomplete, before this point. But, now, we
5197 have a complete type, so we can try again. */
5199 }
5202 /* Is it valid for this decl to have an initializer at all? */
5203 {
5204 /* Don't allow initializations for incomplete types except for
5205 arrays which might be completed by the initialization. */
5211 {
5214 }
5216 {
5219 /* else we already gave an error in start_decl. */
5220 }
5221 }
5223 {
5226 else
5227 {
5229 decl);
5230 /* Change the type so that assemble_variable will give
5231 DECL an rtl we can live with: (mem (const_int 0)). */
5233 }
5234 }
5236 /* Create a new scope to hold this declaration if necessary.
5237 Whether or not a new scope is necessary cannot be determined
5238 until after the type has been completed; if the type is a
5239 specialization of a class template it is not until after
5240 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
5241 will be set correctly. */
5243 }
5245 /* Handle initialization of references. DECL, TYPE, and INIT have the
5246 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
5247 but will be set to a new CLEANUP_STMT if a temporary is created
5248 that must be destroyed subsequently.
5250 Returns an initializer expression to use to initialize DECL, or
5251 NULL if the initialization can be performed statically.
5253 Quotes on semantics can be found in ARM 8.4.3. */
5255 static tree
5257 {
5259 {
5265 }
5269 tf_warning_or_error);
5274 /* Note: default conversion is only called in very special cases. */
5277 /* check_initializer handles this for non-reference variables, but for
5278 references we need to do it here or the initializer will get the
5279 incomplete array type and confuse later calls to
5280 cp_complete_array_type. */
5285 {
5289 }
5291 /* Convert INIT to the reference type TYPE. This may involve the
5292 creation of a temporary, whose lifetime must be the same as that
5293 of the reference. If so, a DECL_EXPR for the temporary will be
5294 added just after the DECL_EXPR for DECL. That's why we don't set
5295 DECL_INITIAL for local references (instead assigning to them
5296 explicitly); we need to allow the temporary to be initialized
5297 first. */
5299 tf_warning_or_error);
5300 }
5302 /* Designated initializers in arrays are not supported in GNU C++.
5303 The parser cannot detect this error since it does not know whether
5304 a given brace-enclosed initializer is for a class type or for an
5305 array. This function checks that CE does not use a designated
5306 initializer. If it does, an error is issued. Returns true if CE
5307 is valid, i.e., does not have a designated initializer. */
5309 static bool
5312 {
5313 /* Designated initializers for array elements are not supported. */
5315 {
5316 /* The parser only allows identifiers as designated
5317 initializers. */
5319 {
5323 }
5325 {
5329 }
5337 {
5338 /* A C99 designator is OK if it matches the current index. */
5341 else
5343 }
5344 else
5349 }
5352 }
5354 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5355 array until we finish parsing the initializer. If that's the
5356 situation we're in, update DECL accordingly. */
5358 static void
5360 {
5366 {
5367 /* do_default is really a C-ism to deal with tentative definitions.
5368 But let's leave it here to ease the eventual merge. */
5373 /* Check that there are no designated initializers in INIT, as
5374 those are not supported in GNU C++, and as the middle-end
5375 will crash if presented with a non-numeric designated
5376 initializer. */
5378 {
5381 HOST_WIDE_INT i;
5385 }
5388 {
5390 do_default);
5392 {
5396 }
5398 {
5400 {
5403 }
5404 /* If a `static' var's size isn't known, make it extern as
5405 well as static, so it does not get allocated. If it's not
5406 `static', then don't mark it extern; finish_incomplete_decl
5407 will give it a default size and it will get allocated. */
5410 }
5412 {
5415 }
5416 }
5421 }
5422 }
5424 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5425 any appropriate error messages regarding the layout. */
5427 static void
5429 {
5430 tree type;
5436 /* If we haven't already laid out this declaration, do so now.
5437 Note that we must not call complete type for an external object
5438 because it's type might involve templates that we are not
5439 supposed to instantiate yet. (And it's perfectly valid to say
5440 `extern X x' for some incomplete type `X'.) */
5449 {
5450 /* An automatic variable with an incomplete type: that is an error.
5451 Don't talk about array types here, since we took care of that
5452 message in grokdeclarator. */
5456 }
5457 #if 0
5458 /* Keep this code around in case we later want to control debug info
5459 based on whether a type is "used". (jason 1999-11-11) */
5462 /* Let debugger know it should output info for this type. */
5467 #endif
5472 {
5475 else
5476 {
5480 }
5481 }
5482 }
5484 /* If a local static variable is declared in an inline function, or if
5485 we have a weak definition, we must endeavor to create only one
5486 instance of the variable at link-time. */
5488 void
5490 {
5491 /* Static data in a function with comdat linkage also has comdat
5492 linkage. */
5494 /* Don't mess with __FUNCTION__. */
5499 {
5501 {
5502 /* With weak symbols, we simply make the variable COMDAT;
5503 that will cause copies in multiple translations units to
5504 be merged. */
5506 }
5507 else
5508 {
5511 {
5512 /* Without weak symbols, we can use COMMON to merge
5513 uninitialized variables. */
5516 }
5517 else
5518 {
5519 /* While for initialized variables, we must use internal
5520 linkage -- which means that multiple copies will not
5521 be merged. */
5527 "%q#D are wrong (you%'ll wind up with "
5529 else
5531 "static data %q#D are wrong (you%'ll wind "
5537 }
5538 }
5539 }
5540 }
5542 /* Issue an error message if DECL is an uninitialized const variable. */
5544 static void
5546 {
5549 /* ``Unless explicitly declared extern, a const object does not have
5550 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5551 7.1.6 */
5556 {
5564 else
5565 {
5569 decl);
5571 }
5574 {
5575 tree defaulted_ctor;
5582 "constructor is not user-provided because it is "
5585 "and the implicitly-defined constructor does not "
5587 }
5588 }
5589 }
5590 \f
5591 /* Structure holding the current initializer being processed by reshape_init.
5592 CUR is a pointer to the current element being processed, END is a pointer
5593 after the last element present in the initializer. */
5594 struct reshape_iter
5595 {
5598 };
5602 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5603 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5604 initialized. If there are no more such fields, the return value
5605 will be NULL. */
5607 tree
5609 {
5618 }
5620 /* Return true for [dcl.init.list] direct-list-initialization from
5621 single element of enumeration with a fixed underlying type. */
5623 bool
5625 {
5634 }
5636 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5637 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5638 INTEGER_CST representing the size of the array minus one (the maximum index),
5639 or NULL_TREE if the array was declared without specifying the size. D is
5640 the iterator within the constructor. */
5642 static tree
5644 tsubst_flags_t complain)
5645 {
5646 tree new_init;
5651 /* The initializer for an array is always a CONSTRUCTOR. */
5655 {
5656 /* Minus 1 is used for zero sized arrays. */
5662 /* sizetype is sign extended, not zero extended. */
5663 else
5665 }
5667 /* Loop until there are no more initializers. */
5671 {
5672 tree elt_init;
5677 complain);
5685 /* This can happen with an invalid initializer (c++/54501). */
5688 }
5691 }
5693 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5694 Parameters are the same of reshape_init_r. */
5696 static tree
5698 {
5707 }
5709 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5710 Parameters are the same of reshape_init_r. */
5712 static tree
5714 {
5720 {
5723 {
5728 }
5731 }
5733 /* For a vector, we initialize it as an array of the appropriate size. */
5738 }
5740 /* Subroutine of reshape_init_r, processes the initializers for classes
5741 or union. Parameters are the same of reshape_init_r. */
5743 static tree
5745 tsubst_flags_t complain)
5746 {
5747 tree field;
5748 tree new_init;
5752 /* The initializer for a class is always a CONSTRUCTOR. */
5757 {
5758 /* [dcl.init.aggr]
5760 An initializer for an aggregate member that is an
5761 empty class shall have the form of an empty
5762 initializer-list {}. */
5764 {
5768 }
5770 }
5772 /* Loop through the initializable fields, gathering initializers. */
5774 {
5775 tree field_init;
5778 /* Handle designated initializers, as an extension. */
5780 {
5785 /* We already reshaped this. */
5789 else
5790 {
5795 }
5798 {
5803 }
5804 }
5806 /* If we processed all the member of the class, we are done. */
5816 {
5817 /* This can happen with an invalid initializer for a flexible
5818 array member (c++/54441). */
5822 }
5826 /* [dcl.init.aggr]
5828 When a union is initialized with a brace-enclosed
5829 initializer, the braces shall only contain an
5830 initializer for the first member of the union. */
5835 }
5838 }
5840 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5841 designators are not valid; either complain or return true to indicate
5842 that reshape_init_r should return error_mark_node. */
5844 static bool
5846 {
5848 {
5852 else
5854 }
5856 }
5858 /* Subroutine of reshape_init, which processes a single initializer (part of
5859 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5860 iterator within the CONSTRUCTOR which points to the initializer to process.
5861 FIRST_INITIALIZER_P is true if this is the first initializer of the
5862 outermost CONSTRUCTOR node. */
5864 static tree
5866 tsubst_flags_t complain)
5867 {
5878 {
5879 /* A complex type can be initialized from one or two initializers,
5880 but braces are not elided. */
5883 {
5885 {
5888 else
5890 }
5891 }
5893 {
5901 }
5903 }
5905 /* A non-aggregate type is always initialized with a single
5906 initializer. */
5908 {
5909 /* It is invalid to initialize a non-aggregate type with a
5910 brace-enclosed initializer before C++0x.
5911 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5912 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5913 a CONSTRUCTOR (with a record type). */
5915 /* Don't complain about a capture-init. */
5918 {
5920 {
5922 /* Isn't value-initialization. */
5924 {
5927 type);
5929 }
5930 }
5931 else
5933 }
5937 }
5939 /* "If T is a class type and the initializer list has a single element of
5940 type cv U, where U is T or a class derived from T, the object is
5941 initialized from that element." Even if T is an aggregate. */
5943 && first_initializer_p
5946 {
5949 }
5951 /* [dcl.init.aggr]
5953 All implicit type conversions (clause _conv_) are considered when
5954 initializing the aggregate member with an initializer from an
5955 initializer-list. If the initializer can initialize a member,
5956 the member is initialized. Otherwise, if the member is itself a
5957 non-empty subaggregate, brace elision is assumed and the
5958 initializer is considered for the initialization of the first
5959 member of the subaggregate. */
5961 /* But don't try this for the first initializer, since that would be
5962 looking through the outermost braces; A a2 = { a1 }; is not a
5963 valid aggregate initialization. */
5964 && !first_initializer_p
5967 complain)))
5968 {
5971 }
5973 /* [dcl.init.string]
5975 A char array (whether plain char, signed char, or unsigned char)
5976 can be initialized by a string-literal (optionally enclosed in
5977 braces); a wchar_t array can be initialized by a wide
5978 string-literal (optionally enclosed in braces). */
5981 {
5984 /* Strip one level of braces if and only if they enclose a single
5985 element (as allowed by [dcl.init.string]). */
5989 {
5991 }
5993 /* If it's a string literal, then it's the initializer for the array
5994 as a whole. Otherwise, continue with normal initialization for
5995 array types (one value per array element). */
5997 {
6002 }
6003 }
6005 /* The following cases are about aggregates. If we are not within a full
6006 initializer already, and there is not a CONSTRUCTOR, it means that there
6007 is a missing set of braces (that is, we are processing the case for
6008 which reshape_init exists). */
6010 {
6012 {
6014 /* There is no need to reshape pointer-to-member function
6015 initializers, as they are always constructed correctly
6016 by the front end. */
6017 ;
6019 /* For a nested compound literal, there is no need to reshape since
6020 brace elision is not allowed. Even if we decided to allow it,
6021 we should add a call to reshape_init in finish_compound_literal,
6022 before calling digest_init, so changing this code would still
6023 not be necessary. */
6025 else
6026 {
6030 }
6031 }
6036 type);
6037 }
6039 /* Dispatch to specialized routines. */
6046 else
6048 }
6050 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
6051 brace-enclosed aggregate initializer.
6053 INIT is the CONSTRUCTOR containing the list of initializers describing
6054 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
6055 It may not presently match the shape of the TYPE; for example:
6057 struct S { int a; int b; };
6058 struct S a[] = { 1, 2, 3, 4 };
6060 Here INIT will hold a vector of four elements, rather than a
6061 vector of two elements, each itself a vector of two elements. This
6062 routine transforms INIT from the former form into the latter. The
6063 revised CONSTRUCTOR node is returned. */
6065 tree
6067 {
6069 reshape_iter d;
6070 tree new_init;
6076 /* An empty constructor does not need reshaping, and it is always a valid
6077 initializer. */
6081 /* Handle [dcl.init.list] direct-list-initialization from
6082 single element of enumeration with a fixed underlying type. */
6084 {
6088 {
6091 }
6092 else
6094 }
6096 /* Recurse on this CONSTRUCTOR. */
6104 /* Make sure all the element of the constructor were used. Otherwise,
6105 issue an error about exceeding initializers. */
6107 {
6111 }
6118 }
6120 /* Verify array initializer. Returns true if errors have been reported. */
6122 bool
6124 {
6127 /* The array type itself need not be complete, because the
6128 initializer may tell us how many elements are in the array.
6129 But, the elements of the array must be complete. */
6131 {
6135 else
6138 }
6139 /* A compound literal can't have variable size. */
6143 {
6146 }
6148 }
6150 /* Subroutine of check_initializer; args are passed down from that function.
6151 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
6153 static tree
6156 {
6159 }
6161 /* Verify INIT (the initializer for DECL), and record the
6162 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
6163 grok_reference_init.
6165 If the return value is non-NULL, it is an expression that must be
6166 evaluated dynamically to initialize DECL. */
6168 static tree
6170 {
6173 tree core_type;
6175 /* Things that are going to be initialized need to have complete
6176 type. */
6180 {
6181 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
6182 it doesn't have storage to be initialized. */
6185 }
6188 /* We will have already complained. */
6192 {
6195 }
6197 {
6202 }
6203 else
6204 /* There is no way to make a variable-sized class type in GNU C++. */
6208 {
6211 {
6213 {
6216 }
6218 {
6220 "scalar object %qD requires one element in "
6224 }
6225 }
6226 }
6229 {
6236 }
6238 ;
6241 {
6243 {
6246 }
6249 /* Do not reshape constructors of vectors (they don't need to be
6250 reshaped. */
6252 {
6254 {
6256 tf_warning_or_error);
6258 }
6260 {
6261 /* Don't reshape if the class has constructors. */
6264 "in C++98 %qD must be initialized by "
6266 decl);
6267 }
6269 {
6272 }
6273 else
6274 {
6277 }
6278 }
6282 {
6285 /* We get here with code like `int a (2);' */
6287 tf_warning_or_error);
6288 }
6290 /* If DECL has an array type without a specific bound, deduce the
6291 array size from the initializer. */
6305 {
6308 /* A constructor call is a non-trivial initializer even if
6309 it isn't explicitly written. */
6313 /* If this is a constexpr initializer, expand_default_init will
6314 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6315 case, pull the initializer back out and pass it down into
6316 store_init_value. */
6321 {
6324 /* Don't call digest_init; it's unnecessary and will complain
6325 about aggregate initialization of non-aggregate classes. */
6327 }
6329 {
6330 /* Declared constexpr, but no suitable initializer; massage
6331 init appropriately so we can pass it into store_init_value
6332 for the error. */
6335 {
6339 }
6341 }
6342 else
6344 }
6347 {
6348 /* In aggregate initialization of a variable, each element
6349 initialization is a full-expression because there is no
6350 enclosing expression. */
6365 }
6366 }
6367 else
6368 {
6376 }
6382 {
6383 /* We might have set these in cp_finish_decl. */
6386 }
6390 {
6398 else
6402 {
6406 }
6408 }
6411 }
6413 /* If DECL is not a local variable, give it RTL. */
6415 static void
6417 {
6421 /* Set the DECL_ASSEMBLER_NAME for the object. */
6423 {
6424 /* The `register' keyword, when used together with an
6425 asm-specification, indicates that the variable should be
6426 placed in a particular register. */
6428 {
6431 }
6432 else
6433 {
6438 }
6439 }
6441 /* Handle non-variables up front. */
6443 {
6446 }
6448 /* If we see a class member here, it should be a static data
6449 member. */
6451 {
6453 /* An in-class declaration of a static data member should be
6454 external; it is only a declaration, and not a definition. */
6459 }
6461 /* We don't create any RTL for local variables. */
6465 /* We defer emission of local statics until the corresponding
6466 DECL_EXPR is expanded. But with constexpr its function might never
6467 be expanded, so go ahead and tell cgraph about the variable now. */
6472 /* Defer template instantiations. */
6477 /* If we're not deferring, go ahead and assemble the variable. */
6480 }
6482 /* walk_tree helper for wrap_temporary_cleanups, below. */
6484 static tree
6486 {
6487 /* Stop at types or full-expression boundaries. */
6490 {
6493 }
6496 {
6501 /* Tell honor_protect_cleanup_actions to handle this as a separate
6502 cleanup. */
6506 }
6509 }
6511 /* We're initializing a local variable which has a cleanup GUARD. If there
6512 are any temporaries used in the initializer INIT of this variable, we
6513 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6514 variable will be cleaned up properly if one of them throws.
6516 Unfortunately, there's no way to express this properly in terms of
6517 nesting, as the regions for the temporaries overlap the region for the
6518 variable itself; if there are two temporaries, the variable needs to be
6519 the first thing destroyed if either of them throws. However, we only
6520 want to run the variable's cleanup if it actually got constructed. So
6521 we need to guard the temporary cleanups with the variable's cleanup if
6522 they are run on the normal path, but not if they are run on the
6523 exceptional path. We implement this by telling
6524 honor_protect_cleanup_actions to strip the variable cleanup from the
6525 exceptional path. */
6527 static void
6529 {
6531 }
6533 /* Generate code to initialize DECL (a local variable). */
6535 static void
6537 {
6539 tree cleanup;
6547 {
6548 /* If we used it already as memory, it must stay in memory. */
6552 }
6557 /* Compute and store the initial value. */
6562 /* Generate a cleanup, if necessary. */
6565 /* Perform the initialization. */
6567 {
6571 {
6572 /* Stick simple initializers in DECL_INITIAL so that
6573 -Wno-init-self works (c++/34772). */
6578 {
6582 OPT_Winit_self,
6584 }
6585 }
6586 else
6587 {
6590 /* If we're only initializing a single object, guard the
6591 destructors of any temporaries used in its initializer with
6592 its destructor. This isn't right for arrays because each
6593 element initialization is a full-expression. */
6602 saved_stmts_are_full_exprs_p;
6603 }
6604 }
6606 /* Set this to 0 so we can tell whether an aggregate which was
6607 initialized was ever used. Don't do this if it has a
6608 destructor, so we don't complain about the 'resource
6609 allocation is initialization' idiom. Now set
6610 attribute((unused)) on types so decls of that type will be
6611 marked used. (see TREE_USED, above.) */
6613 && ! already_used
6622 }
6624 /* DECL is a VAR_DECL for a compiler-generated variable with static
6625 storage duration (like a virtual table) whose initializer is a
6626 compile-time constant. Initialize the variable and provide it to the
6627 back end. */
6629 void
6631 {
6632 tree init;
6642 }
6644 /* INIT is the initializer for a variable, as represented by the
6645 parser. Returns true iff INIT is type-dependent. */
6647 static bool
6649 {
6651 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6654 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6655 {
6668 }
6669 else
6670 /* It must be a simple expression, e.g., int i = 3; */
6674 }
6676 /* INIT is the initializer for a variable, as represented by the
6677 parser. Returns true iff INIT is value-dependent. */
6679 static bool
6681 {
6683 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6686 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6687 {
6697 }
6698 else
6699 /* It must be a simple expression, e.g., int i = 3; */
6703 }
6705 // Returns true if a DECL is VAR_DECL with the concept specifier.
6708 {
6710 // Not all variables have DECL_LANG_SPECIFIC.
6713 }
6715 /* A helper function to be called via walk_tree. If any label exists
6716 under *TP, it is (going to be) forced. Set has_forced_label_in_static. */
6718 static tree
6720 {
6726 }
6728 /* Finish processing of a declaration;
6729 install its line number and initial value.
6730 If the length of an array type is not known before,
6731 it must be determined now, from the initial value, or it is an error.
6733 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6734 true, then INIT is an integral constant expression.
6736 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6737 if the (init) syntax was used. */
6739 void
6742 {
6743 tree type;
6748 tree auto_node;
6753 {
6757 }
6760 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6767 /* Warn about register storage specifiers except when in GNU global
6768 or local register variable extension. */
6770 {
6773 "ISO C++17 does not allow %<register%> storage "
6775 else
6778 }
6780 /* If a name was specified, get the string. */
6795 {
6796 tree d_init;
6798 {
6802 {
6803 /* init is null because we're deferring instantiating the
6804 initializer until we need it. Well, we need it now. */
6807 }
6810 }
6813 {
6817 tf_warning_or_error);
6819 }
6829 {
6834 }
6836 }
6847 {
6848 tree clone;
6850 {
6851 /* FIXME check this is 1st decl. */
6856 {
6860 }
6862 }
6864 {
6867 else
6869 }
6870 }
6873 {
6875 /* If DECL is a reference, then we want to know whether init is a
6876 reference constant; init_const_expr_p as passed tells us whether
6877 it's an rvalue constant. */
6881 {
6882 /* Set these flags now for templates. We'll update the flags in
6883 store_init_value for instantiations. */
6886 /* FIXME setting TREE_CONSTANT on refs breaks the back end. */
6889 }
6890 }
6893 {
6896 /* Add this declaration to the statement-tree. */
6903 {
6906 }
6908 /* Generally, initializers in templates are expanded when the
6909 template is instantiated. But, if DECL is a variable constant
6910 then it can be used in future constant expressions, so its value
6911 must be available. */
6916 && init_const_expr_p
6921 {
6922 /* This variable seems to be a non-dependent constant, so process
6923 its initializer. If check_initializer returns non-null the
6924 initialization wasn't constant after all. */
6925 tree init_code;
6931 }
6935 {
6936 /* Deduce array size even if the initializer is dependent. */
6938 /* And complain about multiple initializers. */
6942 tf_warning_or_error);
6943 }
6948 }
6950 /* Just store non-static data member initializers for later. */
6954 /* Take care of TYPE_DECLs up front. */
6956 {
6959 {
6963 }
6965 /* If we have installed this as the canonical typedef for this
6966 type, and that type has not been defined yet, delay emitting
6967 the debug information for it, as we will emit it later. */
6973 at_eof);
6975 }
6977 /* A reference will be modified here, as it is initialized. */
6981 {
6984 }
6987 {
6988 /* If this is a local variable that will need a mangled name,
6989 register it now. We must do this before processing the
6990 initializer for the variable, since the initialization might
6991 require a guard variable, and since the mangled name of the
6992 guard variable will depend on the mangled name of this
6993 variable. */
6997 {
6999 /* Normally has_forced_label_in_static is set during GIMPLE
7000 lowering, but [cd]tors are never actually compiled directly.
7001 We need to set this early so we can deal with the label
7002 address extension. */
7006 {
7009 }
7010 /* And make sure it's in the symbol table for
7011 c_parse_final_cleanups to find. */
7013 }
7015 /* Convert the initializer to the type of DECL, if we have not
7016 already initialized DECL. */
7018 /* If !DECL_EXTERNAL then DECL is being defined. In the
7019 case of a static data member initialized inside the
7020 class-specifier, there can be an initializer even if DECL
7021 is *not* defined. */
7023 {
7027 /* Handle:
7029 [dcl.init]
7031 The memory occupied by any object of static storage
7032 duration is zero-initialized at program startup before
7033 any other initialization takes place.
7035 We cannot create an appropriate initializer until after
7036 the type of DECL is finalized. If DECL_INITIAL is set,
7037 then the DECL is statically initialized, and any
7038 necessary zero-initialization has already been performed. */
7043 /* Remember that the initialization for this variable has
7044 taken place. */
7046 /* This declaration is the definition of this variable,
7047 unless we are initializing a static data member within
7048 the class specifier. */
7051 }
7052 /* If the variable has an array type, lay out the type, even if
7053 there is no initializer. It is valid to index through the
7054 array, and we must get TYPE_ALIGN set correctly on the array
7055 type. */
7062 /* So decl is a global variable or a static member of a
7063 non local class. Record the types it uses
7064 so that we can decide later to emit debug info for them. */
7066 }
7068 /* Add this declaration to the statement-tree. This needs to happen
7069 after the call to check_initializer so that the DECL_EXPR for a
7070 reference temp is added before the DECL_EXPR for the reference itself. */
7072 {
7073 /* If we're building a variable sized type, and we might be
7074 reachable other than via the top of the current binding
7075 level, then create a new BIND_EXPR so that we deallocate
7076 the object at the right time. */
7081 {
7082 tree bind;
7087 }
7089 }
7091 /* Let the middle end know about variables and functions -- but not
7092 static data members in uninstantiated class templates. */
7094 {
7096 {
7099 }
7101 /* This needs to happen after the linkage is set. */
7105 {
7106 /* If a TREE_READONLY variable needs initialization
7107 at runtime, it is no longer readonly and we need to
7108 avoid MEM_READONLY_P being set on RTL created for it. */
7110 {
7114 }
7118 /* Likewise if it needs destruction. */
7121 }
7125 /* Check for abstractness of the type. Notice that there is no
7126 need to strip array types here since the check for those types
7127 is already done within create_array_type_for_decl. */
7131 /* No initialization required. */
7132 ;
7134 {
7136 {
7138 {
7139 /* An out-of-class default definition is defined at
7140 the point where it is explicitly defaulted. */
7145 }
7146 else
7148 }
7149 /* else no initialization required. */
7150 }
7154 {
7157 }
7158 /* A variable definition. */
7160 /* Initialize the local variable. */
7163 /* If a variable is defined, and then a subsequent
7164 definition with external linkage is encountered, we will
7165 get here twice for the same variable. We want to avoid
7166 calling expand_static_init more than once. For variables
7167 that are not static data members, we can call
7168 expand_static_init only when we actually process the
7169 initializer. It is not legal to redeclare a static data
7170 member, so this issue does not arise in that case. */
7173 }
7175 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
7176 reference, insert it in the statement-tree now. */
7178 {
7183 }
7189 }
7191 /* For class TYPE return itself or some its bases that contain
7192 any direct non-static data members. Return error_mark_node if an
7193 error has been diagnosed. */
7195 static tree
7197 {
7205 {
7209 else
7214 }
7216 {
7224 }
7225 else
7235 {
7240 {
7242 {
7247 }
7251 /* OK, found the same base along another path. We'll complain
7254 {
7256 "classes %qT and %qT have non-static data "
7259 }
7260 else
7262 }
7263 }
7265 }
7267 /* Return std::tuple_size<TYPE>::value. */
7269 static tree
7271 {
7287 else
7289 }
7291 /* Return std::tuple_element<I,TYPE>::type. */
7293 static tree
7295 {
7303 tf_warning_or_error);
7306 }
7308 /* Return e.get<i>() or get<i>(e). */
7310 static tree
7312 {
7320 /* [The id-expression] e is an lvalue if the type of the entity e is an
7321 lvalue reference and an xvalue otherwise. */
7329 {
7334 }
7335 else
7336 {
7342 }
7343 }
7345 /* It's impossible to recover the decltype of a tuple decomposition variable
7346 based on the actual type of the variable, so store it in a hash table. */
7349 static void
7351 {
7355 }
7357 tree
7359 {
7361 }
7363 /* Finish a decomposition declaration. DECL is the underlying declaration
7364 "e", FIRST is the head of a chain of decls for the individual identifiers
7365 chained through DECL_CHAIN in reverse order and COUNT is the number of
7366 those decls. */
7368 void
7370 {
7372 {
7373 error_out:
7375 {
7378 {
7381 }
7383 }
7387 }
7391 /* This happens for range for when not in templates.
7392 Still add the DECL_VALUE_EXPRs for later processing. */
7393 || (!processing_template_decl
7395 {
7397 {
7399 {
7405 }
7409 }
7411 }
7417 {
7420 }
7426 {
7429 }
7434 {
7435 tree nelts;
7440 {
7443 }
7446 {
7447 cnt_mismatch:
7451 else
7455 }
7458 {
7466 NULL_TREE);
7469 }
7470 }
7471 /* 2 GNU extensions. */
7473 {
7479 {
7487 t);
7490 }
7491 }
7493 {
7499 {
7509 NULL_TREE);
7512 }
7513 }
7515 {
7517 {
7521 }
7527 {
7538 {
7542 }
7543 /* Save the decltype away before reference collapse. */
7549 {
7550 /* In this case the names are variables, not just proxies. */
7553 }
7557 }
7558 /* Ignore reads from the underlying decl performed during initialization
7559 of the individual variables. If those will be read, we'll mark
7560 the underlying decl as read at that point. */
7562 }
7564 {
7567 }
7569 {
7572 }
7574 {
7577 }
7578 else
7579 {
7584 {
7588 }
7592 else
7593 eltscnt++;
7598 {
7602 }
7607 else
7608 {
7610 NULL_TREE);
7616 {
7619 }
7620 i++;
7621 }
7622 }
7624 {
7627 {
7632 }
7633 }
7636 }
7638 /* Returns a declaration for a VAR_DECL as if:
7640 extern "C" TYPE NAME;
7642 had been seen. Used to create compiler-generated global
7643 variables. */
7645 static tree
7647 {
7648 tree decl;
7656 /* If the user has explicitly declared this variable (perhaps
7657 because the code we are compiling is part of a low-level runtime
7658 library), then it is possible that our declaration will be merged
7659 with theirs by pushdecl. */
7665 }
7667 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
7668 if "__cxa_atexit" is not being used) corresponding to the function
7669 to be called when the program exits. */
7671 static tree
7673 {
7674 tree fn_type;
7677 {
7678 tree arg_type;
7681 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
7683 else
7684 /* The parameter to "atexit" is "void (*)(void)". */
7690 }
7693 }
7695 /* Returns a pointer to the `atexit' function. Note that if
7696 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
7697 `__cxa_atexit' function specified in the IA64 C++ ABI. */
7699 static tree
7701 {
7702 tree atexit_fndecl;
7703 tree fn_type;
7704 tree fn_ptr_type;
7712 {
7713 /* The declaration for `__cxa_atexit' is:
7715 int __cxa_atexit (void (*)(void *), void *, void *)
7717 We build up the argument types and then the function type
7718 itself. */
7722 /* First, build the pointer-to-function type for the first
7723 argument. */
7725 /* Then, build the rest of the argument types. */
7728 {
7731 }
7732 else
7733 {
7736 }
7737 /* And the final __cxa_atexit type. */
7740 NULL_TREE);
7743 else
7745 }
7746 else
7747 {
7748 /* The declaration for `atexit' is:
7750 int atexit (void (*)());
7752 We build up the argument types and then the function type
7753 itself. */
7755 /* Build the final atexit type. */
7759 }
7761 /* Now, build the function declaration. */
7769 }
7771 /* Like get_atexit_node, but for thread-local cleanups. */
7773 static tree
7775 {
7776 /* The declaration for `__cxa_thread_atexit' is:
7778 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7782 NULL_TREE);
7784 /* Now, build the function declaration. */
7788 }
7790 /* Returns the __dso_handle VAR_DECL. */
7792 static tree
7794 {
7798 /* Declare the variable. */
7800 ptr_type_node);
7802 #ifdef HAVE_GAS_HIDDEN
7804 {
7807 }
7808 #endif
7811 }
7813 /* Begin a new function with internal linkage whose job will be simply
7814 to destroy some particular variable. */
7818 static tree
7820 {
7822 tree fntype;
7823 tree fndecl;
7829 /* No need to mangle this. */
7832 /* Build the name of the function. */
7834 /* Build the function declaration. */
7837 /* It's a function with internal linkage, generated by the
7838 compiler. */
7841 /* Make the function `inline' so that it is only emitted if it is
7842 actually needed. It is unlikely that it will be inlined, since
7843 it is only called via a function pointer, but we avoid unnecessary
7844 emissions this way. */
7847 /* Build the parameter. */
7849 {
7854 }
7862 }
7864 /* Finish the cleanup function begun by start_cleanup_fn. */
7866 static void
7868 {
7872 }
7874 /* Generate code to handle the destruction of DECL, an object with
7875 static storage duration. */
7877 tree
7879 {
7880 tree cleanup;
7881 tree addr;
7882 tree compound_stmt;
7883 tree fcall;
7884 tree type;
7887 tree atex_node;
7893 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7894 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7895 destructor to "__cxa_atexit"; we don't have to build a temporary
7896 function to do the cleanup. */
7897 dso_parm = (flag_use_cxa_atexit
7902 {
7905 /* Make sure it is accessible. */
7907 tf_warning_or_error);
7908 }
7909 else
7910 {
7911 /* Call build_cleanup before we enter the anonymous function so
7912 that any access checks will be done relative to the current
7913 scope, rather than the scope of the anonymous function. */
7916 /* Now start the function. */
7919 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7920 to the original function, rather than the anonymous one. That
7921 will make the back end think that nested functions are in use,
7922 which causes confusion. */
7927 /* Create the body of the anonymous function. */
7932 }
7934 /* Call atexit with the cleanup function. */
7940 else
7944 {
7945 /* We must convert CLEANUP to the type that "__cxa_atexit"
7946 expects. */
7948 /* "__cxa_atexit" will pass the address of DECL to the
7949 cleanup function. */
7952 /* The declared type of the parameter to "__cxa_atexit" is
7953 "void *". For plain "T*", we could just let the
7954 machinery in cp_build_function_call convert it -- but if the
7955 type is "cv-qualified T *", then we need to convert it
7956 before passing it in, to avoid spurious errors. */
7958 }
7959 else
7960 /* Since the cleanup functions we build ignore the address
7961 they're given, there's no reason to pass the actual address
7962 in, and, in general, it's cheaper to pass NULL than any
7963 other value. */
7968 tf_warning_or_error);
7970 /* Just pass NULL to the dso handle parm if we don't actually
7971 have a DSO handle on this target. */
7973 else
7977 {
7980 {
7983 }
7984 else
7985 {
7988 }
7989 }
7990 else
7991 {
7994 }
7997 }
7999 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
8000 is its initializer. Generate code to handle the construction
8001 and destruction of DECL. */
8003 static void
8005 {
8009 /* Some variables require no dynamic initialization. */
8011 {
8012 /* Make sure the destructor is callable. */
8016 }
8020 {
8024 else
8029 {
8031 "C++11 %<thread_local%> allows dynamic initialization "
8034 }
8036 }
8039 {
8040 /* Emit code to perform this initialization but once. */
8045 /* We don't need thread-safety code for thread-local vars. */
8049 /* Emit code to perform this initialization but once. This code
8050 looks like:
8052 static <type> guard;
8053 if (!__atomic_load (guard.first_byte)) {
8054 if (__cxa_guard_acquire (&guard)) {
8055 bool flag = false;
8056 try {
8057 // Do initialization.
8058 flag = true; __cxa_guard_release (&guard);
8059 // Register variable for destruction at end of program.
8060 } catch {
8061 if (!flag) __cxa_guard_abort (&guard);
8062 }
8063 }
8064 }
8066 Note that the `flag' variable is only set to 1 *after* the
8067 initialization is complete. This ensures that an exception,
8068 thrown during the construction, will cause the variable to
8069 reinitialized when we pass through this code again, as per:
8071 [stmt.dcl]
8073 If the initialization exits by throwing an exception, the
8074 initialization is not complete, so it will be tried again
8075 the next time control enters the declaration.
8077 This process should be thread-safe, too; multiple threads
8078 should not be able to initialize the variable more than
8079 once. */
8081 /* Create the guard variable. */
8084 /* Begin the conditional initialization. */
8091 {
8104 acquire_fn = push_library_fn
8107 NULL_TREE),
8112 NULL_TREE);
8122 inner_if_stmt);
8130 void_node,
8134 /* Do the initialization itself. */
8136 init = add_stmt_to_compound
8138 init = add_stmt_to_compound
8140 }
8141 else
8144 /* Use atexit to register a function for destroying this static
8145 variable. */
8151 {
8155 }
8160 }
8163 else
8165 }
8167 \f
8168 /* Make TYPE a complete type based on INITIAL_VALUE.
8169 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8170 2 if there was no information (in which case assume 0 if DO_DEFAULT),
8171 3 if the initializer list is empty (in pedantic mode). */
8173 int
8175 {
8179 /* Don't get confused by a CONSTRUCTOR for some other type. */
8186 {
8188 tree value;
8190 /* An array of character type can be initialized from a
8191 brace-enclosed string constant.
8193 FIXME: this code is duplicated from reshape_init. Probably
8194 we should just call reshape_init here? */
8198 {
8205 }
8207 /* If any of the elements are parameter packs, we can't actually
8208 complete this type now because the array size is dependent. */
8210 {
8213 {
8216 }
8217 }
8218 }
8222 /* We can create the array before the element type is complete, which
8223 means that we didn't have these two bits set in the original type
8224 either. In completing the type, we are expected to propagate these
8225 bits. See also complete_type which does the same thing for arrays
8226 of fixed size. */
8229 {
8234 }
8237 }
8239 /* As above, but either give an error or reject zero-size arrays, depending
8240 on COMPLAIN. */
8242 int
8245 {
8248 /* In SFINAE context we can't be lenient about zero-size arrays. */
8255 {
8261 {
8264 }
8268 }
8270 }
8271 \f
8272 /* Return zero if something is declared to be a member of type
8273 CTYPE when in the context of CUR_TYPE. STRING is the error
8274 message to print in that case. Otherwise, quietly return 1. */
8276 static int
8278 {
8280 {
8283 else
8286 }
8288 }
8289 \f
8290 /* Subroutine of `grokdeclarator'. */
8292 /* Generate errors possibly applicable for a given set of specifiers.
8293 This is for ARM $7.1.2. */
8295 static void
8303 {
8305 {
8342 }
8346 && !flag_noexcept_type
8352 }
8354 /* DECL is a member function or static data member and is presently
8355 being defined. Check that the definition is taking place in a
8356 valid namespace. */
8358 static void
8360 {
8361 /* These checks only apply to member functions and static data
8362 members. */
8364 /* We check for problems with specializations in pt.c in
8365 check_specialization_namespace, where we can issue better
8366 diagnostics. */
8369 /* We check this in check_explicit_instantiation_namespace. */
8372 /* [class.mfct]
8374 A member function definition that appears outside of the
8375 class definition shall appear in a namespace scope enclosing
8376 the class definition.
8378 [class.static.data]
8380 The definition for a static data member shall appear in a
8381 namespace scope enclosing the member's class definition. */
8385 }
8387 /* Build a PARM_DECL for the "this" parameter of FN. TYPE is the
8388 METHOD_TYPE for a non-static member function; QUALS are the
8389 cv-qualifiers that apply to the function. */
8391 tree
8393 {
8394 tree this_type;
8395 tree qual_type;
8396 tree parm;
8397 cp_cv_quals this_quals;
8400 {
8401 this_type
8404 }
8405 else
8407 /* The `this' parameter is implicitly `const'; it cannot be
8408 assigned to. */
8414 }
8416 /* DECL is a static member function. Complain if it was declared
8417 with function-cv-quals. */
8419 static void
8421 {
8424 decl);
8425 }
8427 // Check that FN takes no arguments and returns bool.
8428 static void
8430 {
8431 // A constraint is nullary.
8435 // The declared return type of the concept shall be bool, and
8436 // it shall not be deduced from it definition.
8442 }
8444 /* Helper function. Replace the temporary this parameter injected
8445 during cp_finish_omp_declare_simd with the real this parameter. */
8447 static tree
8449 {
8458 }
8460 /* CTYPE is class type, or null if non-class.
8461 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8462 or METHOD_TYPE.
8463 DECLARATOR is the function's name.
8464 PARMS is a chain of PARM_DECLs for the function.
8465 VIRTUALP is truthvalue of whether the function is virtual or not.
8466 FLAGS are to be passed through to `grokclassfn'.
8467 QUALS are qualifiers indicating whether the function is `const'
8468 or `volatile'.
8469 RAISES is a list of exceptions that this function can raise.
8470 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8471 not look, and -1 if we should not call `grokclassfn' at all.
8473 SFK is the kind of special function (if any) for the new function.
8475 Returns `NULL_TREE' if something goes wrong, after issuing
8476 applicable error messages. */
8478 static tree
8480 tree type,
8481 tree declarator,
8482 tree parms,
8483 tree orig_declarator,
8484 tree decl_reqs,
8487 cp_cv_quals quals,
8488 cp_ref_qualifier rqual,
8489 tree raises,
8495 special_function_kind sfk,
8498 tree in_namespace,
8500 location_t location)
8501 {
8502 tree decl;
8504 tree t;
8506 // Was the concept specifier present?
8509 // Concept declarations must have a corresponding definition.
8511 {
8514 }
8523 /* Set the constraints on the declaration. */
8525 {
8530 /* Adjust the required expression into a constraint. */
8536 }
8538 /* If we have an explicit location, use it, otherwise use whatever
8539 build_lang_decl used (probably input_location). */
8544 {
8549 /* Allocate space to hold the vptr bit if needed. */
8551 }
8557 /* Propagate volatile out from type to decl. */
8561 /* Setup decl according to sfk. */
8563 {
8576 }
8579 {
8582 orig_declarator);
8583 else
8584 {
8589 {
8590 /* Something like `template <class T> friend void f<T>()'. */
8593 orig_declarator);
8595 }
8598 /* A friend declaration of the form friend void f<>(). Record
8599 the information in the TEMPLATE_ID_EXPR. */
8608 {
8611 decl);
8613 }
8616 {
8619 decl);
8621 }
8622 }
8623 }
8625 /* If this decl has namespace scope, set that up. */
8631 /* `main' and builtins have implicit 'C' linkage. */
8646 /* Should probably propagate const out from type to decl I bet (mrs). */
8648 {
8651 }
8657 {
8661 }
8664 {
8675 }
8677 /* Members of anonymous types and local classes have no linkage; make
8678 them internal. If a typedef is made later, this will be changed. */
8684 {
8685 /* [basic.link]: A name with no linkage (notably, the name of a class
8686 or enumeration declared in a local scope) shall not be used to
8687 declare an entity with linkage.
8689 DR 757 relaxes this restriction for C++0x. */
8691 }
8695 {
8698 }
8700 /* If the declaration was declared inline, mark it as such. */
8702 {
8706 }
8710 // If the concept declaration specifier was found, check
8711 // that the declaration satisfies the necessary requirements.
8713 {
8716 }
8720 {
8723 TYPE_UNQUALIFIED,
8724 REF_QUAL_NONE);
8727 {
8731 decl);
8733 }
8736 {
8740 decl);
8742 }
8743 }
8746 {
8748 {
8752 }
8756 }
8761 {
8765 /* [over.literal]/6: Literal operators shall not have C linkage. */
8767 {
8771 }
8774 {
8777 {
8780 }
8784 {
8788 }
8790 {
8794 }
8795 }
8796 else
8797 {
8800 }
8801 }
8804 /* Make the init_value nonzero so pushdecl knows this is not
8805 tentative. error_mark_node is replaced later with the BLOCK. */
8812 {
8813 /* Adjust "omp declare simd" attributes. */
8816 {
8817 tree attr;
8820 {
8825 {
8827 cl = c_omp_declare_simd_clauses_to_numbers
8831 else
8833 }
8834 }
8835 }
8836 }
8838 /* Caller will do the rest of this. */
8845 /* 12.4/3 */
8853 template_count,
8864 {
8867 }
8869 /* Check main's type after attributes have been applied. */
8871 {
8873 integer_type_node))
8874 {
8876 tree newtype;
8880 }
8883 }
8886 {
8888 (processing_template_decl
8890 ? current_template_parms
8897 {
8898 tree ok;
8899 tree pushed_scope;
8902 /* Because grokfndecl is always supposed to return a
8903 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8904 here. We depend on our callers to figure out that its
8905 really a template that's being returned. */
8910 {
8911 /* Remove the `this' parm added by grokclassfn. */
8914 }
8916 {
8919 }
8921 {
8926 }
8928 /* Since we've smashed OLD_DECL to its
8929 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8933 /* Attempt to merge the declarations. This can fail, in
8934 the case of some invalid specialization declarations. */
8940 {
8944 }
8948 }
8949 }
8961 }
8963 /* decl is a FUNCTION_DECL.
8964 specifiers are the parsed virt-specifiers.
8966 Set flags to reflect the virt-specifiers.
8968 Returns decl. */
8970 static tree
8972 {
8980 }
8982 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8983 the linkage that DECL will receive in the object file. */
8985 static void
8987 {
8988 /* A static data member always has static storage duration and
8989 external linkage. Note that static data members are forbidden in
8990 local classes -- the only situation in which a class has
8991 non-external linkage. */
8994 /* For non-template classes, static data members are always put
8995 out in exactly those files where they are defined, just as
8996 with ordinary namespace-scope variables. */
8999 }
9001 /* Create a VAR_DECL named NAME with the indicated TYPE.
9003 If SCOPE is non-NULL, it is the class type or namespace containing
9004 the variable. If SCOPE is NULL, the variable should is created in
9005 the innermost enclosing scope. */
9007 static tree
9009 tree name,
9010 tree orig_declarator,
9017 tree scope)
9018 {
9019 tree decl;
9020 tree explicit_scope;
9027 /* Compute the scope in which to place the variable, but remember
9028 whether or not that scope was explicitly specified by the user. */
9031 {
9032 /* An explicit "extern" specifier indicates a namespace-scope
9033 variable. */
9038 }
9042 template, we need DECL_LANG_SPECIFIC. */
9044 /* Similarly for namespace-scope variables with language linkage
9045 other than C++. */
9048 /* Similarly for static data members. */
9050 /* Similarly for explicit specializations. */
9051 || (orig_declarator
9054 else
9059 else
9063 {
9066 }
9069 {
9071 /* This function is only called with out-of-class definitions. */
9074 }
9075 /* At top level, either `static' or no s.c. makes a definition
9076 (perhaps tentative), and absence of `static' makes it public. */
9078 {
9081 || ! constp
9082 || volatilep
9085 }
9086 /* Not at top level, only `static' makes a static definition. */
9087 else
9088 {
9091 }
9094 {
9096 {
9100 }
9103 }
9105 /* If the type of the decl has no linkage, make sure that we'll
9106 notice that in mark_used. */
9115 {
9116 /* [basic.link]: A name with no linkage (notably, the name of a class
9117 or enumeration declared in a local scope) shall not be used to
9118 declare an entity with linkage.
9120 DR 757 relaxes this restriction for C++0x. */
9123 }
9124 else
9132 /* Check that the variable can be safely declared as a concept.
9133 Note that this also forbids explicit specializations. */
9135 {
9137 {
9140 }
9141 else
9146 }
9149 {
9153 }
9155 // Handle explicit specializations and instantiations of variable templates.
9161 }
9163 /* Create and return a canonical pointer to member function type, for
9164 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
9166 tree
9168 {
9170 tree t;
9175 /* Make sure that we always have the unqualified pointer-to-member
9176 type first. */
9178 {
9181 }
9183 /* If a canonical type already exists for this type, use it. We use
9184 this method instead of type_hash_canon, because it only does a
9185 simple equality check on the list of field members. */
9193 /* Let the front end know this is a pointer to member function. */
9200 delta_type_node);
9206 /* Zap out the name so that the back end will give us the debugging
9207 information for this anonymous RECORD_TYPE. */
9210 /* Cache this pointer-to-member type so that we can find it again
9211 later. */
9220 }
9222 /* Create and return a pointer to data member type. */
9224 tree
9226 {
9228 {
9233 }
9234 else
9235 {
9238 }
9239 }
9241 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
9242 Check to see that the definition is valid. Issue appropriate error
9243 messages. Return 1 if the definition is particularly bad, or 0
9244 otherwise. */
9246 static int
9248 {
9249 /* Avoid redundant diagnostics on out-of-class definitions. */
9252 /* Can't check yet if we don't know the type. */
9255 /* If DECL is declared constexpr, we'll do the appropriate checks
9256 in check_initializer. Similarly for inline static data members. */
9262 {
9265 "in-class initialization of static data member %q#D of "
9269 "%<constexpr%> needed for in-class initialization of "
9271 else
9273 "in-class initialization of static data member %q#D of "
9276 }
9278 /* Motion 10 at San Diego: If a static const integral data member is
9279 initialized with an integral constant expression, the initializer
9280 may appear either in the declaration (within the class), or in
9281 the definition, but not both. If it appears in the class, the
9282 member is a member constant. The file-scope definition is always
9283 required. */
9285 {
9287 "invalid in-class initialization of static data member "
9289 type);
9291 }
9294 "ISO C++ forbids in-class initialization of non-const "
9296 decl);
9299 "ISO C++ forbids initialization of member constant "
9303 }
9305 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
9306 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
9307 expressions out into temporary variables so that walk_tree doesn't
9308 step into them (c++/15764). */
9310 static tree
9312 {
9316 {
9322 }
9326 }
9328 /* Entry point for the above. */
9330 static void
9332 {
9334 /* Break out any function calls into temporary variables. */
9336 }
9338 /* Reduce a SIZEOF_EXPR to its value. */
9340 tree
9342 {
9343 tree r;
9350 else
9356 }
9358 /* Given the SIZE (i.e., number of elements) in an array, compute
9359 an appropriate index type for the array. If non-NULL, NAME is
9360 the name of the entity being declared. */
9362 tree
9364 {
9365 tree itype;
9372 {
9379 /* In C++98, we mark a non-constant array bound with a magic
9381 else
9382 {
9387 {
9390 {
9396 else
9399 }
9403 }
9410 }
9415 /* The array bound must be an integer type. */
9417 {
9422 else
9426 }
9427 }
9429 /* A type is dependent if it is...an array type constructed from any
9430 dependent type or whose size is specified by a constant expression
9431 that is value-dependent. */
9432 /* We can only call value_dependent_expression_p on integral constant
9433 expressions; treat non-constant expressions as dependent, too. */
9437 {
9438 /* We cannot do any checking for a SIZE that isn't known to be
9439 constant. Just build the index type and mark that it requires
9440 structural equality checks. */
9447 }
9450 {
9455 /* Use the folded result for VLAs, too; it will have resolved
9456 SIZEOF_EXPR. */
9458 }
9460 /* Normally, the array-bound will be a constant. */
9462 {
9463 /* Check to see if the array bound overflowed. Make that an
9464 error, no matter how generous we're being. */
9467 /* An array must have a positive number of elements. */
9469 {
9474 else
9477 }
9478 /* As an extension we allow zero-sized arrays. */
9480 {
9482 /* We must fail if performing argument deduction (as
9483 indicated by the state of complain), so that
9484 another substitution can be found. */
9490 else
9492 }
9493 }
9495 /* We don't allow VLAs at non-function scopes, or during
9496 tentative template substitution. */
9499 {
9502 /* `(int) &fn' is not a valid array bound. */
9505 name);
9506 else
9509 }
9511 {
9514 else
9516 }
9518 {
9522 else
9525 }
9528 /* A variable sized array. */
9530 else
9531 {
9532 /* Compute the index of the largest element in the array. It is
9533 one less than the number of elements in the array. We save
9534 and restore PROCESSING_TEMPLATE_DECL so that computations in
9535 cp_build_binary_op will be appropriately folded. */
9536 {
9537 processing_template_decl_sentinel s;
9539 MINUS_EXPR,
9542 complain),
9543 complain);
9545 }
9548 {
9549 /* A variable sized array. */
9556 {
9557 /* We have to add 1 -- in the ubsan routine we generate
9558 LE_EXPR rather than LT_EXPR. */
9563 }
9564 }
9565 /* Make sure that there was no overflow when creating to a signed
9566 index type. (For example, on a 32-bit machine, an array with
9567 size 2^32 - 1 is too big.) */
9570 {
9575 }
9576 }
9578 /* Create and return the appropriate index type. */
9581 /* If the index type were dependent, we would have returned early, so
9582 remember that it isn't. */
9586 }
9588 /* Returns the scope (if any) in which the entity declared by
9589 DECLARATOR will be located. If the entity was declared with an
9590 unqualified name, NULL_TREE is returned. */
9592 tree
9594 {
9598 /* If the declarator-id is a SCOPE_REF, the scope in which the
9599 declaration occurs is the first operand. */
9604 /* Otherwise, the declarator is not a qualified name; the entity will
9605 be declared in the current scope. */
9607 }
9609 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
9610 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
9611 with this type. */
9613 static tree
9615 {
9618 /* If things have already gone awry, bail now. */
9622 /* 8.3.4/1: If the type of the identifier of D contains the auto
9623 type-specifier, the program is ill-formed. */
9625 {
9628 }
9630 /* If there are some types which cannot be array elements,
9631 issue an error-message and return. */
9633 {
9637 else
9644 else
9651 else
9658 else
9664 }
9666 /* [dcl.array]
9668 The constant expressions that specify the bounds of the arrays
9669 can be omitted only for the first member of the sequence. */
9671 {
9675 name);
9676 else
9681 }
9683 /* Figure out the index type for the array. */
9687 /* [dcl.array]
9688 T is called the array element type; this type shall not be [...] an
9689 abstract class type. */
9693 }
9695 /* Returns the smallest location != UNKNOWN_LOCATION among the
9696 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
9697 and LOCATIONS[ds_restrict]. */
9699 static location_t
9701 {
9716 }
9718 /* Check that it's OK to declare a function with the indicated TYPE
9719 and TYPE_QUALS. SFK indicates the kind of special function (if any)
9720 that this function is. OPTYPE is the type given in a conversion
9721 operator declaration, or the class type for a constructor/destructor.
9722 Returns the actual return type of the function; that may be different
9723 than TYPE if an error occurs, or for certain special functions. */
9725 static tree
9727 tree type,
9728 tree optype,
9731 {
9733 {
9743 else
9754 /* We can't use the proper return type here because we run into
9755 problems with ambiguous bases and covariant returns. */
9758 else
9767 "qualifiers are not allowed on declaration of "
9778 "qualifiers are not allowed on declaration of "
9789 }
9792 }
9794 /* A variable or data member (whose unqualified name is IDENTIFIER)
9795 has been declared with the indicated TYPE. If the TYPE is not
9796 acceptable, issue an error message and return a type to use for
9797 error-recovery purposes. */
9799 tree
9801 {
9803 {
9807 {
9810 }
9811 else
9814 }
9817 }
9819 /* Handle declaring DECL as an inline variable. */
9821 static void
9823 {
9826 {
9830 }
9833 "inline variables are only available "
9836 {
9839 }
9840 }
9843 /* Assign a typedef-given name to a class or enumeration type declared
9844 as anonymous at first. This was split out of grokdeclarator
9845 because it is also used in libcc1. */
9847 void
9849 {
9852 /* Replace the anonymous name with the real name everywhere. */
9854 {
9856 /* We do not rename the debug info representing the
9857 unnamed tagged type because the standard says in
9858 [dcl.typedef] that the naming applies only for
9859 linkage purposes. */
9860 /*debug_hooks->set_name (t, decl);*/
9862 }
9867 /* If this is a typedef within a template class, the nested
9868 type is a (non-primary) template. The name for the
9869 template needs updating as well. */
9874 /* Adjust linkage now that we aren't unnamed anymore. */
9877 /* FIXME remangle member functions; member functions of a
9878 type with external linkage have external linkage. */
9880 /* Check that our job is done, and that it would fail if we
9881 attempted to do it again. */
9883 }
9885 /* Given declspecs and a declarator (abstract or otherwise), determine
9886 the name and type of the object declared and construct a DECL node
9887 for it.
9889 DECLSPECS points to the representation of declaration-specifier
9890 sequence that precedes declarator.
9892 DECL_CONTEXT says which syntactic context this declaration is in:
9893 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9894 FUNCDEF for a function definition. Like NORMAL but a few different
9895 error messages in each case. Return value may be zero meaning
9896 this definition is too screwy to try to parse.
9897 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9898 handle member functions (which have FIELD context).
9899 Return value may be zero meaning this definition is too screwy to
9900 try to parse.
9901 PARM for a parameter declaration (either within a function prototype
9902 or before a function body). Make a PARM_DECL, or return void_type_node.
9903 TPARM for a template parameter declaration.
9904 CATCHPARM for a parameter declaration before a catch clause.
9905 TYPENAME if for a typename (in a cast or sizeof).
9906 Don't make a DECL node; just return the ..._TYPE node.
9907 FIELD for a struct or union field; make a FIELD_DECL.
9908 BITFIELD for a field with specified width.
9910 INITIALIZED is as for start_decl.
9912 ATTRLIST is a pointer to the list of attributes, which may be NULL
9913 if there are none; *ATTRLIST may be modified if attributes from inside
9914 the declarator should be applied to the declaration.
9916 When this function is called, scoping variables (such as
9917 CURRENT_CLASS_TYPE) should reflect the scope in which the
9918 declaration occurs, not the scope in which the new declaration will
9919 be placed. For example, on:
9921 void S::f() { ... }
9923 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
9924 should not be `S'.
9926 Returns a DECL (if a declarator is present), a TYPE (if there is no
9927 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
9928 error occurs. */
9930 tree
9936 {
9948 /* True if this declarator is a function definition. */
9952 #if 0
9953 /* See the code below that used this. */
9955 #endif
9957 /* Keep track of what sort of function is being processed
9958 so that we can warn about default return values, or explicit
9959 return values which do not match prescribed defaults. */
9965 /* cv-qualifiers that apply to the declarator, for a declaration of
9966 a member function. */
9968 /* virt-specifiers that apply to the declarator, for a declaration of
9969 a member function. */
9971 /* ref-qualifier that applies to the declarator, for a declaration of
9972 a member function. */
9974 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
9981 /* The unqualified name of the declarator; either an
9982 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
9983 tree unqualified_id;
9984 /* The class type, if any, in which this entity is located,
9985 or NULL_TREE if none. Note that this value may be different from
9986 the current class type; for example if an attempt is made to declare
9987 "A::f" inside "B", this value will be "A". */
9989 /* The NAMESPACE_DECL for the namespace in which this entity is
9990 located. If an unqualified name is used to declare the entity,
9991 this value will be NULL_TREE, even if the entity is located at
9992 namespace scope. */
9994 cp_storage_class storage_class;
10015 // Was concept_p specified? Note that ds_concept
10016 // implies ds_constexpr!
10049 /* Look inside a declarator for the name being declared
10050 and get it as a string, for an error message. */
10052 id_declarator;
10054 {
10059 {
10063 {
10067 }
10071 {
10077 {
10079 {
10080 /* [dcl.meaning]
10082 A declarator-id shall not be qualified except
10083 for ...
10085 None of the cases are permitted in block
10086 scope. */
10089 decl);
10093 else
10097 }
10099 {
10102 {
10105 }
10107 && current_class_type
10109 current_class_type))
10110 {
10114 }
10115 }
10118 }
10120 {
10122 {
10124 {
10127 }
10130 {
10133 }
10140 }
10144 {
10150 }
10151 /* Fall through. */
10158 {
10160 dname);
10162 }
10165 else
10166 {
10173 else
10175 }
10180 }
10182 }
10199 }
10202 }
10204 /* [dcl.fct.edf]
10206 The declarator in a function-definition shall have the form
10207 D1 ( parameter-declaration-clause) ... */
10209 {
10212 }
10217 {
10220 }
10223 {
10226 {
10229 }
10232 {
10234 {
10237 }
10239 {
10242 }
10243 }
10244 }
10246 /* Anything declared one level down from the top level
10247 must be one of the parameters of a function
10248 (because the body is at least two levels down). */
10250 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
10251 by not allowing C++ class definitions to specify their parameters
10252 with xdecls (must be spec.d in the parmlist).
10254 Since we now wait to push a class scope until we are sure that
10255 we are in a legitimate method context, we must set oldcname
10256 explicitly (since current_class_name is not yet alive).
10258 We also want to avoid calling this a PARM if it is in a namespace. */
10261 {
10267 }
10273 {
10276 }
10279 {
10282 }
10284 /* If there were multiple types specified in the decl-specifier-seq,
10285 issue an error message. */
10287 {
10290 }
10293 {
10296 }
10298 /* Extract the basic type from the decl-specifier-seq. */
10301 {
10304 }
10305 /* If the entire declaration is itself tagged as deprecated then
10306 suppress reports of deprecated items. */
10311 {
10318 }
10319 /* No type at all: default to `int', and set DEFAULTED_INT
10320 because it was not a user-defined typedef. */
10322 {
10324 {
10325 /* These imply 'int'. */
10328 }
10329 /* If we just have "complex", it is equivalent to "complex double". */
10332 {
10335 "ISO C++ does not support plain %<complex%> meaning "
10337 }
10338 }
10339 /* Gather flags. */
10343 #if 0
10344 /* See the code below that used this. */
10347 #endif
10352 else
10356 {
10358 ctor_return_type,
10359 type_quals,
10362 }
10364 {
10369 /* We handle `main' specially here, because 'main () { }' is so
10370 common. With no options, it is allowed. With -Wreturn-type,
10371 it is a warning. It is only an error with -pedantic-errors. */
10372 is_main = (funcdef_flag
10388 else
10393 /* FIXME we should be able to propagate the error_mark_node as is
10394 for other contexts too. */
10396 else
10398 }
10403 {
10405 {
10409 }
10414 }
10416 /* Now process the modifiers that were specified
10417 and check for invalid combinations. */
10419 /* Long double is a special combination. */
10421 {
10425 }
10427 /* Check all other uses of type modifiers. */
10430 {
10452 {
10457 }
10458 else
10459 {
10462 {
10465 name);
10468 }
10469 }
10471 /* Discard the type modifiers if they are invalid. */
10473 {
10479 }
10480 }
10482 /* Decide whether an integer type is signed or not.
10483 Optionally treat bitfields as signed by default. */
10485 /* [class.bit]
10487 It is implementation-defined whether a plain (neither
10488 explicitly signed or unsigned) char, short, int, or long
10489 bit-field is signed or unsigned.
10491 Naturally, we extend this to long long as well. Note that
10492 this does not include wchar_t. */
10494 && !signed_p
10495 /* A typedef for plain `int' without `signed' can be
10496 controlled just like plain `int', but a typedef for
10497 `signed int' cannot be so controlled. */
10498 && !(typedef_decl
10502 {
10515 else
10517 }
10530 {
10533 /* If a modifier is specified, the resulting complex is the complex
10534 form of TYPE. E.g, "complex short" is "complex short int". */
10543 else
10545 }
10547 /* If we're using the injected-class-name to form a compound type or a
10548 declaration, replace it with the underlying class so we don't get
10549 redundant typedefs in the debug output. But if we are returning the
10550 type unchanged, leave it alone so that it's available to
10551 maybe_get_template_decl_from_type_decl. */
10559 type = cp_build_qualified_type_real
10563 /* We might have ignored or rejected some of the qualifiers. */
10570 {
10574 }
10586 {
10588 {
10593 }
10597 }
10600 /* Issue errors about use of storage classes for parameters. */
10602 {
10604 {
10607 }
10609 {
10612 }
10618 /* Function parameters cannot be concept. */
10621 /* Function parameters cannot be constexpr. If we saw one, moan
10622 and pretend it wasn't there. */
10624 {
10627 }
10628 }
10630 /* Give error if `virtual' is used outside of class declaration. */
10633 {
10637 }
10640 {
10655 declspecs->gnu_thread_keyword_p
10661 {
10686 }
10689 {
10691 {
10695 "type must be cv-qualified %<auto%> or reference to "
10697 }
10700 }
10710 }
10712 /* Static anonymous unions are dealt with here. */
10718 /* Warn about storage classes that are invalid for certain
10719 kinds of declarations (parameters, typenames, etc.). */
10721 && ((storage_class
10725 {
10728 }
10733 {
10737 ;
10739 ;
10741 /* C++ allows static class elements. */
10743 /* C++ also allows inlines and signed and unsigned elements,
10744 but in those cases we don't come in here. */
10745 ;
10746 else
10747 {
10750 else
10751 {
10754 else
10756 }
10762 }
10763 }
10768 {
10771 }
10775 {
10780 /* When thread_local is applied to a variable of block scope the
10781 storage-class-specifier static is implied if it does not appear
10782 explicitly. */
10785 }
10788 {
10792 }
10796 else
10797 {
10800 {
10813 }
10814 }
10817 {
10818 /* Apply the c++11 attributes to the type preceding them. */
10822 }
10824 /* Determine the type of the entity declared by recurring on the
10825 declarator. */
10827 {
10829 tree attrs;
10836 {
10848 attr_flags);
10849 }
10853 /* We don't want to warn in parmeter context because we don't
10854 yet know if the parse will succeed, and this might turn out
10855 to be a constructor call. */
10858 /* If the type is class-like and the inner name used a
10859 global namespace qualifier, we need the parens.
10860 Unfortunately all we can tell is whether a qualified name
10861 was used or not. */
10862 && !(inner_declarator
10873 {
10881 /* [dcl.array]/1:
10883 The optional attribute-specifier-seq appertains to the
10884 array. */
10890 {
10891 tree arg_types;
10894 /* Declaring a function type. */
10900 /* Pick up type qualifiers which should be applied to `this'. */
10902 /* Pick up virt-specifiers. */
10904 /* And ref-qualifier, too */
10906 /* And tx-qualifier. */
10908 /* Pick up the exception specifications. */
10910 /* If the exception-specification is ill-formed, let's pretend
10911 there wasn't one. */
10919 /* Say it's a definition only for the CALL_EXPR
10920 closest to the identifier. */
10923 /* Handle a late-specified return type. */
10926 {
10928 {
10930 {
10935 {
10937 "%<auto%> type specifier without trailing "
10940 "only available with -std=c++14 or "
10942 }
10944 {
10948 }
10949 }
10951 {
10956 }
10958 {
10960 {
10963 "for %qT must have trailing return "
10965 else
10968 type);
10971 }
10977 else
10981 }
10982 }
10985 {
10987 /* Not using maybe_warn_cpp0x because this should
10988 always be an error. */
10991 else
10995 }
10996 }
11002 {
11005 }
11008 {
11012 /* We now know that the TYPE_QUALS don't apply to the
11013 decl, but to its return type. */
11015 }
11017 /* Error about some types functions can't return. */
11020 {
11024 }
11026 {
11030 }
11034 && funcdecl_p
11040 {
11041 /* We are within a class's scope. If our declarator name
11042 is the same as the class name, and we are defining
11043 a function, then it is a constructor/destructor, and
11044 therefore returns a void type. */
11046 /* ISO C++ 12.4/2. A destructor may not be declared
11047 const or volatile. A destructor may not be static.
11048 A destructor may not be declared with ref-qualifier.
11050 ISO C++ 12.1. A constructor may not be declared
11051 const or volatile. A constructor may not be
11052 virtual. A constructor may not be static.
11053 A constructor may not be declared with ref-qualifier. */
11059 {
11064 }
11067 {
11073 }
11077 current_class_type,
11078 flags))
11082 {
11083 /* It's a constructor. */
11087 {
11091 }
11095 }
11098 }
11100 {
11102 {
11103 /* Cannot be both friend and virtual. */
11106 }
11112 name);
11113 }
11115 {
11117 {
11120 }
11123 }
11125 {
11128 }
11137 {
11141 }
11147 {
11149 /* transaction_safe applies to the type, but
11150 transaction_safe_dynamic applies to the function. */
11153 else
11155 }
11157 /* [dcl.fct]/2:
11159 The optional attribute-specifier-seq appertains to
11160 the function type. */
11165 }
11171 /* Filter out pointers-to-references and references-to-references.
11172 We can get these if a TYPE_DECL is used. */
11175 {
11177 {
11180 }
11182 /* In C++0x, we allow reference to reference declarations
11183 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
11184 and template type arguments [14.3.1/4 temp.arg.type]. The
11185 check for direct reference to reference declarations, which
11186 are still forbidden, occurs below. Reasoning behind the change
11187 can be found in DR106, DR540, and the rvalue reference
11188 proposals. */
11190 {
11193 }
11194 }
11196 {
11201 }
11203 /* We now know that the TYPE_QUALS don't apply to the decl,
11204 but to the target of the pointer. */
11207 /* This code used to handle METHOD_TYPE, but I don't think it's
11208 possible to get it here anymore. */
11212 {
11216 memfn_quals,
11217 rqual);
11223 }
11231 type);
11233 /* When the pointed-to type involves components of variable size,
11234 care must be taken to ensure that the size evaluation code is
11235 emitted early enough to dominate all the possible later uses
11236 and late enough for the variables on which it depends to have
11237 been assigned.
11239 This is expected to happen automatically when the pointed-to
11240 type has a name/declaration of it's own, but special attention
11241 is required if the type is anonymous.
11243 We handle the NORMAL and FIELD contexts here by inserting a
11244 dummy statement that just evaluates the size at a safe point
11245 and ensures it is not deferred until e.g. within a deeper
11246 conditional context (c++/43555).
11248 We expect nothing to be needed here for PARM or TYPENAME.
11249 Evaluating the size at this point for TYPENAME would
11250 actually be incorrect, as we might be in the middle of an
11251 expression with side effects on the pointed-to type size
11252 "arguments" prior to the pointer declaration point and the
11253 size evaluation could end up prior to the side effects. */
11259 {
11263 }
11266 {
11267 /* In C++0x, the type we are creating a reference to might be
11268 a typedef which is itself a reference type. In that case,
11269 we follow the reference collapsing rules in
11270 [7.1.3/8 dcl.typedef] to create the final reference type:
11272 "If a typedef TD names a type that is a reference to a type
11273 T, an attempt to create the type 'lvalue reference to cv TD'
11274 creates the type 'lvalue reference to T,' while an attempt
11275 to create the type "rvalue reference to cv TD' creates the
11276 type TD."
11277 */
11281 {
11284 else
11286 }
11287 else
11288 type = cp_build_reference_type
11291 /* In C++0x, we need this check for direct reference to
11292 reference declarations, which are forbidden by
11293 [8.3.2/5 dcl.ref]. Reference to reference declarations
11294 are only allowed indirectly through typedefs and template
11295 type arguments. Example:
11297 void foo(int & &); // invalid ref-to-ref decl
11299 typedef int & int_ref;
11300 void foo(int_ref &); // valid ref-to-ref decl
11301 */
11305 }
11309 {
11313 /* We will already have complained. */
11315 else
11317 type);
11318 }
11319 else
11322 /* Process a list of type modifier keywords (such as
11323 const or volatile) that were given inside the `*' or `&'. */
11326 {
11327 type
11331 }
11333 /* Apply C++11 attributes to the pointer, and not to the
11334 type pointed to. This is unlike what is done for GNU
11335 attributes above. It is to comply with [dcl.ptr]/1:
11337 [the optional attribute-specifier-seq (7.6.1) appertains
11338 to the pointer and not to the object pointed to]. */
11351 }
11352 }
11354 /* A `constexpr' specifier used in an object declaration declares
11355 the object as `const'. */
11357 {
11358 /* DR1688 says that a `constexpr' specifier in combination with
11359 `volatile' is valid. */
11362 {
11365 }
11366 }
11372 {
11374 unqualified_id);
11376 }
11378 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
11379 qualified with a class-name, turn it into a METHOD_TYPE, unless
11380 we know that the function is static. We take advantage of this
11381 opportunity to do other processing that pertains to entities
11382 explicitly declared to be class members. Note that if DECLARATOR
11383 is non-NULL, we know it is a cdk_id declarator; otherwise, we
11384 would not have exited the loop above. */
11389 {
11395 {
11397 {
11401 }
11402 else
11406 }
11408 can skip the following checks. */
11411 qualifying type must certainly be complete. */
11412 funcdef_flag
11413 /* A friend declaration of "T::f" is OK, even if
11414 "T" is a template parameter. But, if this
11415 function is not a friend, the qualifying type
11416 must be a class. */
11418 /* For a declaration, the type need not be
11419 complete, if either it is dependent (since there
11420 is no meaningful definition of complete in that
11421 case) or the qualifying class is currently being
11422 defined. */
11425 /* Check that the qualifying type is complete. */
11429 {
11432 {
11440 }
11441 }
11443 {
11447 }
11448 }
11453 /* Now TYPE has the actual type. */
11456 {
11459 else
11461 }
11467 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
11468 a declarator-id appertains to the entity that is declared. */
11471 /* Handle parameter packs. */
11473 {
11475 /* Turn the type into a pack expansion.*/
11477 else
11479 }
11482 && !processing_template_decl
11484 {
11487 else
11490 }
11493 {
11494 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
11495 in the declaration of a constructor or conversion function within
11496 a class definition. */
11503 else
11505 "only declarations of constructors and conversion operators "
11508 }
11511 {
11513 {
11516 }
11518 {
11521 }
11524 {
11527 }
11529 {
11532 }
11534 {
11537 }
11539 {
11543 }
11544 }
11546 /* If this is declaring a typedef name, return a TYPE_DECL. */
11548 {
11549 tree decl;
11551 /* This declaration:
11553 typedef void f(int) const;
11555 declares a function type which is not a member of any
11556 particular class, but which is cv-qualified; for
11557 example "f S::*" declares a pointer to a const-qualified
11558 member function of S. We record the cv-qualification in the
11559 function type. */
11561 {
11564 /* We have now dealt with these qualifiers. */
11567 }
11570 {
11573 }
11580 else
11586 }
11589 {
11593 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
11595 /* The TYPE_DECL is "abstract" because there will be
11596 clones of this constructor/destructor, and there will
11597 be copies of this TYPE_DECL generated in those
11598 clones. The decloning optimization (for space) may
11599 revert this subsequently if it determines that
11600 the clones should share a common implementation. */
11602 }
11607 unqualified_id);
11609 /* If the user declares "typedef struct {...} foo" then the
11610 struct will have an anonymous name. Fill that name in now.
11611 Nothing can refer to it, so nothing needs know about the name
11612 change. */
11614 && unqualified_id
11632 /* Acknowledge that this was written:
11633 `using analias = atype;'. */
11637 }
11639 /* Detect the case of an array type of unspecified size
11640 which came, as such, direct from a typedef name.
11641 We must copy the type, so that the array's domain can be
11642 individually set by the object's initializer. */
11649 /* Detect where we're using a typedef of function type to declare a
11650 function. PARMS will not be set, so we must create it now. */
11653 {
11655 tree args;
11660 {
11666 }
11671 {
11672 /* The qualifiers on the function type become the qualifiers on
11673 the non-static member function. */
11677 }
11678 }
11680 /* If this is a type name (such as, in a cast or sizeof),
11681 compute the type and return it now. */
11684 {
11685 /* Note that here we don't care about type_quals. */
11687 /* Special case: "friend class foo" looks like a TYPENAME context. */
11689 {
11691 {
11694 }
11697 {
11698 /* Don't allow friend declaration without a class-key. */
11705 else
11708 type);
11709 }
11711 /* Only try to do this stuff if we didn't already give up. */
11713 {
11714 /* A friendly class? */
11718 else
11720 type);
11723 }
11724 }
11726 {
11733 /* Core issue #547: need to allow this in template type args.
11734 Allow it in general in C++11 for alias-declarations. */
11738 else
11740 }
11746 }
11750 && ! bitfield
11752 {
11755 }
11758 {
11759 /* Only functions may be declared using an operator-function-id. */
11761 {
11764 }
11769 type);
11770 }
11772 /* We don't check parameter types here because we can emit a better
11773 error message later. */
11775 {
11779 }
11781 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
11782 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
11785 {
11791 {
11794 else
11797 }
11799 /* A parameter declared as an array of T is really a pointer to T.
11800 One declared as a function is really a pointer to a function.
11801 One declared as a member is really a pointer to member. */
11804 {
11805 /* Transfer const-ness of array into that of type pointed to. */
11809 }
11812 }
11817 {
11823 }
11825 {
11829 {
11836 }
11838 {
11841 {
11847 else
11851 }
11853 /* The C99 flexible array extension. */
11856 {
11860 {
11863 }
11864 else
11865 {
11866 /* Array is a flexible member. */
11868 /* Do not warn on flexible array members in system
11873 else
11877 /* Flexible array member has a null domain. */
11879 }
11880 }
11883 {
11884 /* Happens when declaring arrays of sizes which
11885 are error_mark_node, for example. */
11887 }
11889 {
11890 /* Something like struct S { int N::j; }; */
11893 }
11896 {
11898 tree function_context;
11901 {
11902 /* This should never happen in pure C++ (the check
11903 could be an assert). It could happen in
11904 Objective-C++ if someone writes invalid code that
11905 uses a function declaration for an instance
11906 variable or property (instance variables and
11907 properties are parsed as FIELD_DECLs, but they are
11908 part of an Objective-C class, not a C++ class).
11909 That code is invalid and is caught by this
11910 check. */
11912 {
11914 unqualified_id);
11916 }
11918 /* ``A union may [ ... ] not [ have ] virtual functions.''
11919 ARM 9.5 */
11921 {
11923 unqualified_id);
11925 }
11930 {
11934 }
11935 }
11937 /* Check that the name used for a destructor makes sense. */
11939 {
11943 {
11948 }
11951 {
11955 }
11957 {
11960 }
11962 {
11965 }
11966 }
11968 {
11973 }
11976 {
11979 }
11981 {
11984 }
11987 {
11990 {
11996 }
11997 }
11999 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
12011 parms,
12012 unqualified_id,
12013 reqs,
12023 #if 0
12024 /* This clobbers the attrs stored in `decl' from `attrlist'. */
12025 /* The decl and setting of decl_attr is also turned off. */
12027 #endif
12029 /* [class.conv.ctor]
12031 A constructor declared without the function-specifier
12032 explicit that can be called with a single parameter
12033 specifies a conversion from the type of its first
12034 parameter to the type of its class. Such a constructor
12035 is called a converting constructor. */
12038 }
12043 {
12046 {
12048 {
12052 }
12053 else
12058 }
12059 }
12060 else
12061 {
12063 {
12067 }
12069 }
12072 {
12073 /* Friends are treated specially. */
12077 {
12079 {
12080 decl = check_explicit_specialization
12085 }
12089 funcdef_flag);
12091 }
12092 else
12094 }
12096 /* Structure field. It may not be a function, except for C++. */
12099 {
12101 {
12102 /* C++ allows static class members. All other work
12103 for this is done by grokfield. */
12111 unqualified_id);
12113 {
12117 }
12124 /* Even if there is an in-class initialization, DECL
12125 is considered undefined until an out-of-class
12126 definition is provided, unless this is an inline
12127 variable. */
12131 {
12137 }
12138 }
12139 else
12140 {
12143 unqualified_id);
12145 {
12147 unqualified_id);
12149 }
12154 {
12157 }
12160 {
12163 }
12166 {
12167 /* An attempt is being made to initialize a non-static
12168 member. This is new in C++11. */
12171 /* If this has been parsed with static storage class, but
12172 errors forced staticp to be cleared, ensure NSDMI is
12173 not present. */
12176 }
12177 }
12183 }
12184 }
12187 {
12188 tree original_name;
12196 else
12198 // FIXME:gcc_assert (original_name == dname);
12205 {
12208 name);
12209 else
12211 name);
12212 }
12216 /* Function declaration not at top level.
12217 Storage classes other than `extern' are not allowed
12218 and `extern' makes no difference. */
12223 {
12226 "%<static%> specifier invalid for function %qs "
12228 else
12230 "%<inline%> specifier invalid for function %qs "
12232 }
12235 {
12237 {
12240 }
12243 {
12248 }
12249 }
12251 /* Record whether the function is public. */
12261 publicp,
12264 sfk,
12265 funcdef_flag,
12274 {
12277 /* Don't allow a static member function in a class, and forbid
12278 declaring main to be static. */
12280 {
12284 }
12286 {
12287 /* 7.1.1: There can be no static function declarations within a
12288 block. */
12291 }
12294 {
12297 }
12298 }
12299 }
12300 else
12301 {
12302 /* It's a variable. */
12304 /* An uninitialized decl with `extern' is a reference. */
12306 declspecs,
12307 initialized,
12308 type_quals,
12309 inlinep,
12310 concept_p,
12311 template_count,
12321 {
12324 {
12329 }
12331 {
12334 }
12336 {
12338 "cannot explicitly declare member %q#D to have "
12341 }
12342 }
12344 {
12348 }
12353 {
12358 }
12359 }
12364 {
12368 }
12371 {
12373 {
12374 /* It's common practice (and completely valid) to have a const
12375 be initialized and declared extern. */
12378 }
12379 else
12380 {
12383 }
12384 }
12386 /* Record `register' declaration for warnings on &
12387 and in case doing stupid register allocation. */
12390 {
12392 /* Warn about register storage specifiers on PARM_DECLs. */
12394 {
12397 "ISO C++17 does not allow %<register%> storage "
12399 else
12402 }
12403 }
12409 /* Set constexpr flag on vars (functions got it in grokfndecl). */
12413 /* Record constancy and volatility on the DECL itself . There's
12414 no need to do this when processing a template; we'll do this
12415 for the instantiated declaration based on the type of DECL. */
12420 }
12421 }
12422 \f
12423 /* Subroutine of start_function. Ensure that each of the parameter
12424 types (as listed in PARMS) is complete, as is required for a
12425 function definition. */
12427 static void
12429 {
12431 {
12436 {
12442 }
12443 else
12444 /* grokparms or complete_type_or_else will have already issued
12445 an error. */
12447 }
12448 }
12450 /* Returns nonzero if T is a local variable. */
12452 int
12454 {
12456 /* A VAR_DECL with a context that is a _TYPE is a static data
12457 member. */
12459 /* Any other non-local variable must be at namespace scope. */
12465 }
12467 /* Like local_variable_p, but suitable for use as a tree-walking
12468 function. */
12470 static tree
12473 {
12481 }
12483 /* Check that ARG, which is a default-argument expression for a
12484 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
12485 something goes wrong. DECL may also be a _TYPE node, rather than a
12486 DECL, if there is no DECL available. */
12488 tree
12490 {
12491 tree var;
12492 tree decl_type;
12495 /* We get a DEFAULT_ARG when looking at an in-class declaration
12496 with a default argument. Ignore the argument for now; we'll
12497 deal with it after the class is complete. */
12501 {
12504 }
12505 else
12512 /* Something already went wrong. There's no need to check
12513 further. */
12516 /* [dcl.fct.default]
12518 A default argument expression is implicitly converted to the
12519 parameter type. */
12522 LOOKUP_IMPLICIT);
12525 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
12526 the call sites. */
12531 /* [dcl.fct.default]
12533 Local variables shall not be used in default argument
12534 expressions.
12536 The keyword `this' shall not be used in a default argument of a
12537 member function. */
12540 {
12542 {
12546 else
12548 }
12550 }
12552 /* All is well. */
12554 }
12556 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
12558 static tree
12560 {
12565 {
12568 else
12570 }
12572 /* Do warn about using typedefs to a deprecated class. */
12584 return type_is_deprecated
12588 }
12590 /* Decode the list of parameter types for a function type.
12591 Given the list of things declared inside the parens,
12592 return a list of types.
12594 If this parameter does not end with an ellipsis, we append
12595 void_list_node.
12597 *PARMS is set to the chain of PARM_DECLs created. */
12599 tree
12601 {
12604 tree parm;
12608 {
12621 {
12623 && !init
12626 /* DR 577: A parameter list consisting of a single
12627 unnamed parameter of non-dependent type 'void'. */
12631 "invalid use of cv-qualified type %qT in "
12633 else
12635 "invalid use of type %<void%> in parameter "
12637 /* It's not a good idea to actually create parameters of
12638 type `void'; other parts of the compiler assume that a
12639 void type terminates the parameter list. */
12642 }
12645 {
12647 {
12651 }
12653 /* Top-level qualifiers on the parameters are
12654 ignored for function types. */
12657 {
12661 }
12665 {
12666 /* Before C++17 DR 393:
12667 [dcl.fct]/6, parameter types cannot contain pointers
12668 (references) to arrays of unknown bound. */
12673 {
12681 }
12684 ptr
12690 }
12696 }
12701 }
12709 }
12711 \f
12712 /* D is a constructor or overloaded `operator='.
12714 Let T be the class in which D is declared. Then, this function
12715 returns:
12717 -1 if D's is an ill-formed constructor or copy assignment operator
12718 whose first parameter is of type `T'.
12719 0 if D is not a copy constructor or copy assignment
12720 operator.
12721 1 if D is a copy constructor or copy assignment operator whose
12722 first parameter is a reference to non-const qualified T.
12723 2 if D is a copy constructor or copy assignment operator whose
12724 first parameter is a reference to const qualified T.
12726 This function can be used as a predicate. Positive values indicate
12727 a copy constructor and nonzero values indicate a copy assignment
12728 operator. */
12730 int
12732 {
12733 tree args;
12734 tree arg_type;
12742 /* Instantiations of template member functions are never copy
12743 functions. Note that member functions of templated classes are
12744 represented as template functions internally, and we must
12745 accept those as copy functions. */
12757 {
12758 /* Pass by value copy assignment operator. */
12760 }
12764 {
12767 }
12768 else
12774 /* There are more non-optional args. */
12778 }
12780 /* D is a constructor or overloaded `operator='.
12782 Let T be the class in which D is declared. Then, this function
12783 returns true when D is a move constructor or move assignment
12784 operator, false otherwise. */
12786 bool
12788 {
12792 /* There are no move constructors if we are in C++98 mode. */
12798 /* Instantiations of template member functions are never move
12799 functions. Note that member functions of templated classes are
12800 represented as template functions internally, and we must
12801 accept those as move functions. */
12805 }
12807 /* D is a constructor or overloaded `operator='.
12809 Then, this function returns true when D has the same signature as a move
12810 constructor or move assignment operator (because either it is such a
12811 ctor/op= or it is a template specialization with the same signature),
12812 false otherwise. */
12814 bool
12816 {
12817 tree args;
12818 tree arg_type;
12838 /* There are more non-optional args. */
12842 }
12844 /* Remember any special properties of member function DECL. */
12846 void
12848 {
12849 tree class_type;
12856 {
12863 {
12864 /* [class.copy]
12866 A non-template constructor for class X is a copy
12867 constructor if its first parameter is of type X&, const
12868 X&, volatile X& or const volatile X&, and either there
12869 are no other parameters or else all other parameters have
12870 default arguments. */
12876 }
12887 }
12889 {
12890 /* [class.copy]
12892 A non-template assignment operator for class X is a copy
12893 assignment operator if its parameter is of type X, X&, const
12894 X&, volatile X& or const volatile X&. */
12899 {
12905 }
12908 }
12912 /* Destructors are handled in check_methods. */
12913 }
12915 /* Check a constructor DECL has the correct form. Complains
12916 if the class has a constructor of the form X(X). */
12918 bool
12920 {
12924 {
12925 /* [class.copy]
12927 A declaration of a constructor for a class X is ill-formed if
12928 its first parameter is of type (optionally cv-qualified) X
12929 and either there are no other parameters or else all other
12930 parameters have default arguments.
12932 We *don't* complain about member template instantiations that
12933 have this form, though; they can occur as we try to decide
12934 what constructor to use during overload resolution. Since
12935 overload resolution will never prefer such a constructor to
12936 the non-template copy constructor (which is either explicitly
12937 or implicitly defined), there's no need to worry about their
12938 existence. Theoretically, they should never even be
12939 instantiated, but that's hard to forestall. */
12943 }
12946 }
12948 /* DECL is a declaration for an overloaded or conversion operator. If
12949 COMPLAIN is true, errors are issued for invalid declarations. */
12951 bool
12953 {
12962 tree_code operator_code;
12965 {
12966 /* Conversion operators are TYPE_EXPR for the purposes of this
12967 function. */
12970 }
12971 else
12972 {
12979 }
12982 {
12983 /* operator new and operator delete are quite special. */
12986 {
13005 }
13007 /* [basic.std.dynamic.allocation]/1:
13009 A program is ill-formed if an allocation function is declared
13010 in a namespace scope other than global scope or declared
13011 static in global scope.
13013 The same also holds true for deallocation functions. */
13015 {
13017 {
13020 }
13023 {
13026 }
13027 }
13031 else
13032 {
13035 }
13038 }
13040 /* An operator function must either be a non-static member function
13041 or have at least one parameter of a class, a reference to a class,
13042 an enumeration, or a reference to an enumeration. 13.4.0.6 */
13044 {
13050 {
13053 }
13056 {
13060 }
13063 {
13065 {
13070 }
13076 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
13077 because these checks are performed even on template
13078 functions. */
13082 }
13083 }
13086 /* There are no further restrictions on the arguments to an overloaded
13087 "operator ()". */
13091 {
13092 /* 13.4.0.3 */
13095 }
13097 /* Count the number of arguments and check for ellipsis. */
13100 {
13102 {
13103 /* Variadic. */
13106 }
13108 }
13110 /* Verify correct number of arguments. */
13112 {
13115 {
13116 /* We have a unary instance of an ambi-ary op. Remap to the
13117 unary one. */
13123 }
13125 {
13126 /* This was an ambiguous operator but is invalid. */
13131 }
13134 && ! processing_template_decl
13135 /* x++ and x--'s second argument must be an int. */
13137 integer_type_node))
13138 {
13142 decl);
13144 }
13149 {
13154 }
13159 {
13164 }
13169 }
13171 /* There can be no default arguments. */
13174 {
13180 else
13181 {
13184 }
13185 }
13187 /* At this point the declaration is well-formed. It may not be
13188 sensible though. */
13190 /* Check member function warnings only on the in-class declaration.
13191 There's no point warning on an out-of-class definition. */
13195 /* Warn about conversion operators that will never be used. */
13199 {
13208 ref
13214 {
13217 ref
13222 /* Don't force t to be complete here. */
13227 ref
13232 }
13233 }
13238 /* Effective C++ rules below. */
13240 /* More Effective C++ rule 7. */
13247 /* More Effective C++ rule 6. */
13252 {
13261 {
13266 }
13267 else
13268 {
13271 }
13272 }
13274 /* Effective C++ rule 23. */
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 {
13614 /* Mark it as a lambda type. */
13616 /* And push it into current scope. */
13618 }
13620 }
13621 }
13622 else
13623 {
13625 {
13626 /* Check that we aren't trying to overload a class with different
13627 constraints. */
13630 {
13633 }
13636 }
13640 {
13644 }
13646 /* Make injected friend class visible. */
13648 {
13655 {
13659 }
13660 }
13661 }
13664 }
13666 /* Wrapper for xref_tag_1. */
13668 tree
13671 {
13672 tree ret;
13678 }
13681 tree
13683 {
13688 else
13695 }
13697 /* Create the binfo hierarchy for REF with (possibly NULL) base list
13698 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
13699 access_* node, and the TREE_VALUE is the type of the base-class.
13700 Non-NULL TREE_TYPE indicates virtual inheritance. */
13702 void
13704 {
13711 tree default_access;
13717 /* The base of a derived class is private by default, all others are
13718 public. */
13723 /* First, make sure that any templates in base-classes are
13724 instantiated. This ensures that if we call ourselves recursively
13725 we do not get confused about which classes are marked and which
13726 are not. */
13729 {
13732 /* The dependent_type_p call below should really be dependent_scope_p
13733 so that we give a hard error about using an incomplete type as a
13734 base, but we allow it with a pedwarn for backward
13735 compatibility. */
13741 /* An incomplete type. Remove it from the list. */
13743 else
13744 {
13745 max_bases++;
13747 max_dvbases++;
13751 }
13752 }
13757 /* The binfo slot should be empty, unless this is an (ill-formed)
13758 redefinition. */
13769 /* Apply base-class info set up to the variants of this type. */
13773 {
13775 /* A C++98 POD cannot have base classes. */
13780 }
13787 {
13788 /* An aggregate can't have virtual base classes. */
13796 }
13799 {
13807 /* Before C++17, an aggregate cannot have base classes. In C++17, an
13808 aggregate can't have virtual, private, or protected base classes. */
13819 {
13821 basetype);
13823 }
13827 {
13829 /* The original basetype could have been a typedef'd type. */
13832 /* Inherit flags from the base. */
13843 }
13845 /* We must do this test after we've seen through a typedef
13846 type. */
13848 {
13851 else
13854 }
13857 /* Regenerate the pack expansion for the bases. */
13871 dropped_base:
13872 /* Update max_vbases to reflect the reality that we are dropping
13873 this base: if it reaches zero we want to undo the vec_alloc
13874 above to avoid inconsistencies during error-recovery: eg, in
13875 build_special_member_call, CLASSTYPE_VBASECLASSES non null
13876 and vtt null (c++/27952). */
13878 max_vbases--;
13880 max_vbases
13882 }
13889 /* If we didn't get max_vbases vbases, we must have shared at
13890 least one of them, and are therefore diamond shaped. */
13893 /* Unmark all the types. */
13898 /* Now see if we have a repeated base type. */
13900 {
13903 {
13905 {
13908 }
13910 }
13915 else
13917 }
13918 }
13920 \f
13921 /* Copies the enum-related properties from type SRC to type DST.
13922 Used with the underlying type of an enum and the enum itself. */
13923 static void
13925 {
13926 tree t;
13928 {
13938 else
13942 }
13943 }
13945 /* Begin compiling the definition of an enumeration type.
13946 NAME is its name,
13948 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
13950 UNDERLYING_TYPE is the type that will be used as the storage for
13951 the enumeration type. This should be NULL_TREE if no storage type
13952 was specified.
13954 ATTRIBUTES are any attributes specified after the enum-key.
13956 SCOPED_ENUM_P is true if this is a scoped enumeration type.
13958 if IS_NEW is not NULL, gets TRUE iff a new type is created.
13960 Returns the type object, as yet incomplete.
13961 Also records info about it so that build_enumerator
13962 may be used to declare the individual values as they are read. */
13964 tree
13967 {
13973 /* [C++0x dcl.enum]p5:
13975 If not explicitly specified, the underlying type of a scoped
13976 enumeration type is int. */
13983 /* If this is the real definition for a previous forward reference,
13984 fill in the contents in the same object that used to be the
13985 forward reference. */
13991 /* In case of a template_decl, the only check that should be deferred
13992 to instantiation time is the comparison of underlying types. */
13994 {
13996 {
14002 }
14004 {
14010 }
14016 {
14022 }
14023 }
14027 {
14028 /* In case of error, make a dummy enum to allow parsing to
14029 continue. */
14031 {
14034 }
14036 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
14037 of an opaque enum, or an opaque enum of an already defined
14038 enumeration (C++0x only).
14039 In any other case, it'll be NULL_TREE. */
14041 {
14044 }
14047 /* Do not push the decl more than once, unless we need to
14048 compare underlying types at instantiation time */
14051 || (underlying_type
14055 {
14059 /* std::byte aliases anything. */
14064 }
14065 else
14072 /* The enum is considered opaque until the opening '{' of the
14073 enumerator list. */
14076 }
14083 {
14085 /* We already checked that it matches, don't change it to a different
14088 {
14091 }
14094 else
14097 }
14099 /* If into a template class, the returned enum is always the first
14100 declaration (opaque or not) seen. This way all the references to
14101 this type will be to the same declaration. The following ones are used
14102 only to check for definition errors. */
14105 else
14107 }
14109 /* After processing and defining all the values of an enumeration type,
14110 install their decls in the enumeration type.
14111 ENUMTYPE is the type object. */
14113 void
14115 {
14116 tree values;
14117 tree underlying_type;
14118 tree decl;
14119 tree value;
14121 tree t;
14123 bool fixed_underlying_type_p
14126 /* We built up the VALUES in reverse order. */
14129 /* For an enum defined in a template, just set the type of the values;
14130 all further processing is postponed until the template is
14131 instantiated. We need to set the type so that tsubst of a CONST_DECL
14132 works. */
14134 {
14136 values;
14140 }
14142 /* Determine the minimum and maximum values of the enumerators. */
14144 {
14148 values;
14150 {
14153 /* [dcl.enum]: Following the closing brace of an enum-specifier,
14154 each enumerator has the type of its enumeration. Prior to the
14155 closing brace, the type of each enumerator is the type of its
14156 initializing value. */
14159 /* Update the minimum and maximum values, if appropriate. */
14163 /* Figure out what the minimum and maximum values of the
14164 enumerators are. */
14171 }
14172 }
14173 else
14174 /* [dcl.enum]
14176 If the enumerator-list is empty, the underlying type is as if
14177 the enumeration had a single enumerator with value 0. */
14181 {
14182 /* Compute the number of bits require to represent all values of the
14183 enumeration. We must do this before the type of MINNODE and
14184 MAXNODE are transformed, since tree_int_cst_min_precision relies
14185 on the TREE_TYPE of the value it is passed. */
14193 /* Determine the underlying type of the enumeration.
14195 [dcl.enum]
14197 The underlying type of an enumeration is an integral type that
14198 can represent all the enumerator values defined in the
14199 enumeration. It is implementation-defined which integral type is
14200 used as the underlying type for an enumeration except that the
14201 underlying type shall not be larger than int unless the value of
14202 an enumerator cannot fit in an int or unsigned int.
14204 We use "int" or an "unsigned int" as the underlying type, even if
14205 a smaller integral type would work, unless the user has
14206 explicitly requested that we use the smallest possible type. The
14207 user can request that for all enumerations with a command line
14208 flag, or for just one enumeration with an attribute. */
14210 use_short_enum = flag_short_enums
14213 /* If the precision of the type was specified with an attribute and it
14214 was too small, give an error. Otherwise, use it. */
14216 {
14219 else
14220 {
14223 }
14224 }
14228 itk++)
14229 {
14235 }
14237 {
14238 /* DR 377
14240 IF no integral type can represent all the enumerator values, the
14241 enumeration is ill-formed. */
14246 }
14248 /* [dcl.enum]
14250 The value of sizeof() applied to an enumeration type, an object
14251 of an enumeration type, or an enumerator, is the value of sizeof()
14252 applied to the underlying type. */
14255 /* Compute the minimum and maximum values for the type.
14257 [dcl.enum]
14259 For an enumeration where emin is the smallest enumerator and emax
14260 is the largest, the values of the enumeration are the values of the
14261 underlying type in the range bmin to bmax, where bmin and bmax are,
14262 respectively, the smallest and largest values of the smallest bit-
14263 field that can store emin and emax. */
14265 /* The middle-end currently assumes that types with TYPE_PRECISION
14266 narrower than their underlying type are suitably zero or sign
14267 extended to fill their mode. Similarly, it assumes that the front
14268 end assures that a value of a particular type must be within
14269 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
14271 We used to set these fields based on bmin and bmax, but that led
14272 to invalid assumptions like optimizing away bounds checking. So
14273 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
14274 TYPE_MAX_VALUE to the values for the mode above and only restrict
14275 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
14279 set_min_and_max_values_for_integral_type
14282 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
14285 }
14286 else
14289 /* Convert each of the enumerators to the type of the underlying
14290 type of the enumeration. */
14292 {
14293 location_t saved_location;
14299 /* If the enumeration type has a fixed underlying type, we
14300 already checked all of the enumerator values. */
14302 else
14305 tf_warning_or_error);
14308 /* Do not clobber shared ints. */
14310 {
14314 }
14316 }
14318 /* Fix up all variant types of this enum type. */
14325 {
14327 /* TYPE_FIELDS needs fixup. */
14329 }
14331 /* Finish debugging output for this type. */
14334 /* Each enumerator now has the type of its enumeration. Clear the cache
14335 so that this change in types doesn't confuse us later on. */
14337 }
14339 /* Finishes the enum type. This is called only the first time an
14340 enumeration is seen, be it opaque or odinary.
14341 ENUMTYPE is the type object. */
14343 void
14345 {
14347 {
14351 }
14353 /* If this is a forward declaration, there should not be any variants,
14354 though we can get a variant in the middle of an enum-specifier with
14355 wacky code like 'enum E { e = sizeof(const E*) };' */
14359 }
14361 /* Build and install a CONST_DECL for an enumeration constant of the
14362 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
14363 Apply ATTRIBUTES if available. LOC is the location of NAME.
14364 Assignment of sequential values by default is handled here. */
14366 void
14368 location_t loc)
14369 {
14370 tree decl;
14371 tree context;
14372 tree type;
14374 /* scalar_constant_value will pull out this expression, so make sure
14375 it's folded as appropriate. */
14379 /* If the VALUE was erroneous, pretend it wasn't there; that will
14380 result in the enum being assigned the next value in sequence. */
14384 /* Remove no-op casts from the value. */
14389 {
14390 /* Validate and default VALUE. */
14392 {
14394 {
14399 }
14402 value = perform_implicit_conversion_flags
14410 {
14413 {
14417 }
14418 else
14419 {
14423 {
14427 }
14428 }
14429 }
14430 }
14432 /* Default based on previous value. */
14434 {
14436 {
14437 tree prev_value;
14440 /* C++03 7.2/4: If no initializer is specified for the first
14441 enumerator, the type is an unspecified integral
14442 type. Otherwise the type is the same as the type of the
14443 initializing value of the preceding enumerator unless the
14444 incremented value is not representable in that type, in
14445 which case the type is an unspecified integral type
14446 sufficient to contain the incremented value. */
14450 else
14451 {
14457 {
14460 {
14463 {
14469 }
14476 }
14479 else
14481 }
14484 {
14487 }
14488 }
14489 }
14490 else
14492 }
14494 /* Remove no-op casts from the value. */
14497 /* If the underlying type of the enum is fixed, check whether
14498 the enumerator values fits in the underlying type. If it
14499 does not fit, the program is ill-formed [C++0x dcl.enum]. */
14501 && value
14503 {
14508 /* Convert the value to the appropriate type. */
14510 }
14511 }
14513 /* C++ associates enums with global, function, or class declarations. */
14516 /* Build the actual enumeration constant. Note that the enumeration
14517 constants have the underlying type of the enum (if it is fixed)
14518 or the type of their initializer (if the underlying type of the
14519 enum is not fixed):
14521 [ C++0x dcl.enum ]
14523 If the underlying type is fixed, the type of each enumerator
14524 prior to the closing brace is the underlying type; if the
14525 initializing value of an enumerator cannot be represented by
14526 the underlying type, the program is ill-formed. If the
14527 underlying type is not fixed, the type of each enumerator is
14528 the type of its initializing value.
14530 If the underlying type is not fixed, it will be computed by
14531 finish_enum and we will reset the type of this enumerator. Of
14532 course, if we're processing a template, there may be no value. */
14546 {
14547 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
14548 on the TYPE_FIELDS list for `S'. (That's so that you can say
14549 things like `S::i' later.) */
14551 /* The enumerator may be getting declared outside of its enclosing
14552 class, like so:
14554 class S { public: enum E : int; }; enum S::E : int { i = 7; };
14556 For which case we need to make sure that the access of `S::i'
14557 matches the access of `S::E'. */
14563 else
14569 }
14570 else
14573 /* Add this enumeration constant to the list for this type. */
14575 }
14577 /* Look for an enumerator with the given NAME within the enumeration
14578 type ENUMTYPE. This routine is used primarily for qualified name
14579 lookup into an enumerator in C++0x, e.g.,
14581 enum class Color { Red, Green, Blue };
14583 Color color = Color::Red;
14585 Returns the value corresponding to the enumerator, or
14586 NULL_TREE if no such enumerator was found. */
14587 tree
14589 {
14590 tree e;
14595 }
14597 \f
14598 /* We're defining DECL. Make sure that its type is OK. */
14600 static void
14602 {
14606 /* In a function definition, arg types must be complete. */
14613 {
14618 /* Make it return void instead. */
14621 void_type_node,
14623 else
14625 fntype
14628 fntype = (cp_build_type_attribute_variant
14631 }
14632 else
14633 {
14637 }
14638 }
14640 /* True iff FN is an implicitly-defined default constructor. */
14642 static bool
14644 {
14648 }
14650 /* Clobber the contents of *this to let the back end know that the object
14651 storage is dead when we enter the constructor or leave the destructor. */
14653 static tree
14655 {
14656 /* Clobbering an empty base is pointless, and harmful if its one byte
14657 TYPE_SIZE overlays real data. */
14661 /* If we have virtual bases, clobber the whole object, but only if we're in
14662 charge. If we don't have virtual bases, clobber the as-base type so we
14663 don't mess with tail padding. */
14675 {
14678 }
14685 }
14687 /* Create the FUNCTION_DECL for a function definition.
14688 DECLSPECS and DECLARATOR are the parts of the declaration;
14689 they describe the function's name and the type it returns,
14690 but twisted together in a fashion that parallels the syntax of C.
14692 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
14693 DECLARATOR is really the DECL for the function we are about to
14694 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
14695 indicating that the function is an inline defined in-class.
14697 This function creates a binding context for the function body
14698 as well as setting up the FUNCTION_DECL in current_function_decl.
14700 For C++, we must first check whether that datum makes any sense.
14701 For example, "class A local_a(1,2);" means that variable local_a
14702 is an aggregate of type A, which should have a constructor
14703 applied to it with the argument list [1, 2].
14705 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
14706 or may be a BLOCK if the function has been defined previously
14707 in this translation unit. On exit, DECL_INITIAL (decl1) will be
14708 error_mark_node if the function has never been defined, or
14709 a BLOCK if the function has been defined somewhere. */
14711 bool
14713 {
14715 tree fntype;
14716 tree restype;
14719 tree current_function_parms;
14724 /* Sanity check. */
14732 /* ISO C++ 11.4/5. A friend function defined in a class is in
14733 the (lexical) scope of the class in which it is defined. */
14735 {
14738 /* CTYPE could be null here if we're dealing with a template;
14739 for example, `inline friend float foo()' inside a template
14740 will have no CTYPE set. */
14743 else
14745 }
14752 /* Handle gnu_inline attribute. */
14754 {
14759 }
14762 /* This is a constructor, we must ensure that any default args
14763 introduced by this definition are propagated to the clones
14764 now. The clones are used directly in overload resolution. */
14767 /* Sometimes we don't notice that a function is a static member, and
14768 build a METHOD_TYPE for it. Fix that up now. */
14772 /* Set up current_class_type, and enter the scope of the class, if
14773 appropriate. */
14779 /* Now that we have entered the scope of the class, we must restore
14780 the bindings for any template parameters surrounding DECL1, if it
14781 is an inline member template. (Order is important; consider the
14782 case where a template parameter has the same name as a field of
14783 the class.) It is not until after this point that
14784 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
14788 /* Effective C++ rule 15. */
14796 /* Make the init_value nonzero so pushdecl knows this is not tentative.
14797 error_mark_node is replaced below (in poplevel) with the BLOCK. */
14801 /* This function exists in static storage.
14802 (This does not mean `static' in the C sense!) */
14805 /* We must call push_template_decl after current_class_type is set
14806 up. (If we are processing inline definitions after exiting a
14807 class scope, current_class_type will be NULL_TREE until set above
14808 by push_nested_class.) */
14810 {
14813 {
14817 }
14819 }
14821 /* Make sure the parameter and return types are reasonable. When
14822 you declare a function, these types can be incomplete, but they
14823 must be complete when you define the function. */
14826 /* Build the return declaration for the function. */
14830 {
14831 tree resdecl;
14839 }
14841 /* Record the decl so that the function name is defined.
14842 If we already have a decl for this name, and it is a FUNCTION_DECL,
14843 use the old decl. */
14845 {
14846 /* A specialization is not used to guide overload resolution. */
14850 {
14854 /* If something went wrong when registering the declaration,
14855 use DECL1; we have to have a FUNCTION_DECL to use when
14856 parsing the body of the function. */
14857 ;
14858 else
14859 {
14860 /* Otherwise, OLDDECL is either a previous declaration
14861 of the same function or DECL1 itself. */
14868 {
14869 tree context;
14871 /* Check whether DECL1 is in an anonymous
14872 namespace. */
14874 context;
14876 {
14880 }
14884 OPT_Wmissing_declarations,
14886 }
14889 }
14890 }
14891 else
14892 {
14893 /* We need to set the DECL_CONTEXT. */
14896 }
14900 /* If #pragma weak applies, mark the decl appropriately now.
14901 The pragma only applies to global functions. Because
14902 determining whether or not the #pragma applies involves
14903 computing the mangled name for the declaration, we cannot
14904 apply the pragma until after we have merged this declaration
14905 with any previous declarations; if the original declaration
14906 has a linkage specification, that specification applies to
14907 the definition as well, and may affect the mangled name. */
14910 }
14912 /* We are now in the scope of the function being defined. */
14915 /* Save the parm names or decls from this function's declarator
14916 where store_parm_decls will find them. */
14919 /* Let the user know we're compiling this function. */
14924 /* This function may already have been parsed, in which case just
14925 return; our caller will skip over the body without parsing. */
14929 /* Initialize RTL machinery. We cannot do this until
14930 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
14931 even when processing a template; this is how we get
14932 CFUN set up, and our per-function variables initialized.
14933 FIXME factor out the non-RTL stuff. */
14937 /* Initialize the language data structures. Whenever we start
14938 a new function, we destroy temporaries in the usual way. */
14944 {
14947 }
14949 /* Start the statement-tree, start the tree now. */
14952 /* If we are (erroneously) defining a function that we have already
14953 defined before, wipe out what we knew before. */
14958 {
14959 /* We know that this was set up by `grokclassfn'. We do not
14960 wait until `store_parm_decls', since evil parse errors may
14961 never get us to that point. Here we keep the consistency
14962 between `current_class_type' and `current_class_ptr'. */
14968 cp_function_chain->x_current_class_ref
14970 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
14973 /* Constructors and destructors need to know whether they're "in
14974 charge" of initializing virtual base classes. */
14977 {
14980 }
14982 {
14985 }
14986 }
14989 /* Implicitly-defined methods (like the
14990 destructor for a class in which no destructor
14991 is explicitly declared) must not be defined
14992 until their definition is needed. So, we
14993 ignore interface specifications for
14994 compiler-generated functions. */
15000 {
15007 /* This is a function in a local class in an extern inline
15008 or template function. */
15010 }
15011 /* If this function belongs to an interface, it is public.
15012 If it belongs to someone else's interface, it is also external.
15013 This only affects inlines and template instantiations. */
15015 {
15018 {
15022 && ! flag_implement_inlines
15025 /* For WIN32 we also want to put these in linkonce sections. */
15027 }
15028 else
15031 /* If this function is in an interface implemented in this file,
15032 make sure that the back end knows to emit this function
15033 here. */
15036 }
15039 {
15040 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
15041 interface, we will have both finfo->interface_unknown and
15042 finfo->interface_only set. In that case, we don't want to
15043 use the normal heuristics because someone will supply a
15044 #pragma implementation elsewhere, and deducing it here would
15045 produce a conflict. */
15050 }
15051 else
15052 {
15053 /* This is a definition, not a reference.
15054 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
15062 else
15064 }
15066 /* Determine the ELF visibility attribute for the function. We must not
15067 do this before calling "pushdecl", as we must allow "duplicate_decls"
15068 to merge any attributes appropriately. We also need to wait until
15069 linkage is set. */
15083 {
15086 }
15096 /* Clobbering an empty base is harmful if it overlays real data. */
15098 /* We can't clobber safely for an implicitly-defined default constructor
15099 because part of the initialization might happen before we enter the
15100 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
15114 }
15117 /* Like start_preparsed_function, except that instead of a
15118 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
15120 Returns true on success. If the DECLARATOR is not suitable
15121 for a function, we return false, which tells the parser to
15122 skip the entire function. */
15124 bool
15127 tree attrs)
15128 {
15129 tree decl1;
15135 /* If the declarator is not suitable for a function definition,
15136 cause a syntax error. */
15138 {
15141 }
15144 /* main must return int. grokfndecl should have corrected it
15145 (and issued a diagnostic) if the user got it wrong. */
15147 integer_type_node));
15150 }
15151 \f
15152 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
15153 FN. */
15155 static bool
15157 {
15159 && !processing_template_decl
15161 /* We insert the EH_SPEC_BLOCK only in the original
15162 function; then, it is copied automatically to the
15163 clones. */
15165 /* Implicitly-generated constructors and destructors have
15166 exception specifications. However, those specifications
15167 are the union of the possible exceptions specified by the
15168 constructors/destructors for bases and members, so no
15169 unallowed exception will ever reach this function. By
15170 not creating the EH_SPEC_BLOCK we save a little memory,
15171 and we avoid spurious warnings about unreachable
15172 code. */
15174 }
15176 /* Store the parameter declarations into the current function declaration.
15177 This is called after parsing the parameter declarations, before
15178 digesting the body of the function.
15180 Also install to binding contour return value identifier, if any. */
15182 static void
15184 {
15186 tree parm;
15188 /* This is a chain of any other decls that came in among the parm
15189 declarations. If a parm is declared with enum {foo, bar} x;
15190 then CONST_DECLs for foo and bar are put here. */
15194 {
15195 /* This case is when the function was defined with an ANSI prototype.
15196 The parms already have decls, so we need not do anything here
15197 except record them as in effect
15198 and complain if any redundant old-style parm decls were written. */
15201 tree next;
15203 /* Must clear this because it might contain TYPE_DECLs declared
15204 at class level. */
15207 /* If we're doing semantic analysis, then we'll call pushdecl
15208 for each of these. We must do them in reverse order so that
15209 they end in the correct forward order. */
15213 {
15217 else
15218 {
15219 /* If we find an enum constant or a type tag,
15220 put it aside for the moment. */
15223 }
15224 }
15226 /* Get the decls in their original chain order and record in the
15227 function. This is all and only the PARM_DECLs that were
15228 pushed into scope by the loop above. */
15230 }
15231 else
15234 /* Now store the final chain of decls for the arguments
15235 as the decl-chain of the current lexical scope.
15236 Put the enumerators in as well, at the front so that
15237 DECL_ARGUMENTS is not modified. */
15242 }
15244 \f
15245 /* We have finished doing semantic analysis on DECL, but have not yet
15246 generated RTL for its body. Save away our current state, so that
15247 when we want to generate RTL later we know what to do. */
15249 static void
15251 {
15254 /* Save the language-specific per-function data so that we can
15255 get it back when we really expand this function. */
15258 /* Make a copy. */
15263 /* Clear out the bits we don't need. */
15268 }
15271 /* Set the return value of the constructor (if present). */
15273 static void
15275 {
15276 tree val;
15277 tree exprstmt;
15280 {
15281 /* Any return from a constructor will end up here. */
15287 /* Return the address of the object. */
15290 }
15291 }
15293 /* Do all the processing for the beginning of a destructor; set up the
15294 vtable pointers and cleanups for bases and members. */
15296 static void
15298 {
15299 tree compound_stmt;
15301 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
15302 issued an error message. We still want to try to process the
15303 body of the function, but initialize_vtbl_ptrs will crash if
15304 TYPE_BINFO is NULL. */
15306 {
15308 /* Make all virtual function table pointers in non-virtual base
15309 classes point to CURRENT_CLASS_TYPE's virtual function
15310 tables. */
15315 /* Clobbering an empty base is harmful if it overlays real data. */
15317 {
15321 {
15323 tree ref
15330 tf_warning_or_error);
15332 }
15333 else
15335 }
15337 /* And insert cleanups for our bases and members so that they
15338 will be properly destroyed if we throw. */
15340 }
15341 }
15343 /* At the end of every destructor we generate code to delete the object if
15344 necessary. Do that now. */
15346 static void
15348 {
15349 tree exprstmt;
15351 /* Any return from a destructor will end up here; that way all base
15352 and member cleanups will be run when the function returns. */
15356 {
15357 tree val;
15362 /* Return the address of the object. */
15365 }
15366 }
15368 /* Do the necessary processing for the beginning of a function body, which
15369 in this case includes member-initializers, but not the catch clauses of
15370 a function-try-block. Currently, this means opening a binding level
15371 for the member-initializers (in a ctor), member cleanups (in a dtor),
15372 and capture proxies (in a lambda operator()). */
15374 tree
15376 {
15377 tree stmt;
15384 else
15385 /* Always keep the BLOCK node associated with the outermost pair of
15386 curly braces of a function. These are needed for correct
15387 operation of dwarfout.c. */
15398 }
15400 /* Do the processing for the end of a function body. Currently, this means
15401 closing out the cleanups for fully-constructed bases and members, and in
15402 the case of the destructor, deleting the object if desired. Again, this
15403 is only meaningful for [cd]tors, since they are the only functions where
15404 there is a significant distinction between the main body and any
15405 function catch clauses. Handling, say, main() return semantics here
15406 would be wrong, as flowing off the end of a function catch clause for
15407 main() would also need to return 0. */
15409 void
15411 {
15415 /* Close the block. */
15424 }
15426 /* Given a function, returns the BLOCK corresponding to the outermost level
15427 of curly braces, skipping the artificial block created for constructor
15428 initializers. */
15430 tree
15432 {
15442 }
15444 /* If FNDECL is a class's key method, add the class to the list of
15445 keyed classes that should be emitted. */
15447 static void
15449 {
15453 {
15457 }
15458 }
15460 /* Subroutine of finish_function.
15461 Save the body of constexpr functions for possible
15462 future compile time evaluation. */
15464 static void
15466 {
15472 }
15474 /* Finish up a function declaration and compile that function
15475 all the way to assembler language output. The free the storage
15476 for the function definition. INLINE_P is TRUE if we just
15477 finished processing the body of an in-class inline function
15478 definition. (This processing will have taken place after the
15479 class definition is complete.) */
15481 tree
15483 {
15487 /* When we get some parse errors, we can end up without a
15488 current_function_decl, so cope. */
15501 /* TREE_READONLY (fndecl) = 1;
15502 This caused &foo to be of type ptr-to-const-function
15503 which then got a warning when stored in a ptr-to-function variable. */
15506 /* The current function is being defined, so its DECL_INITIAL should
15507 be set, and unless there's a multiple definition, it should be
15508 error_mark_node. */
15511 /* For a cloned function, we've already got all the code we need;
15512 there's no need to add any extra bits. */
15514 {
15515 /* Make it so that `main' always returns 0 by default. */
15522 current_eh_spec_block);
15523 }
15525 /* If we're saving up tree structure, tie off the function now. */
15530 /* If this function can't throw any exceptions, remember that. */
15533 && !flag_non_call_exceptions
15537 /* This must come after expand_function_end because cleanups might
15538 have declarations (from inline functions) that need to go into
15539 this function's blocks. */
15541 /* If the current binding level isn't the outermost binding level
15542 for this function, either there is a bug, or we have experienced
15543 syntax errors and the statement tree is malformed. */
15545 {
15546 /* Make sure we have already experienced errors. */
15549 /* Throw away the broken statement tree and extra binding
15550 levels. */
15554 {
15557 else
15559 }
15560 }
15563 /* Statements should always be full-expressions at the outermost set
15564 of curly braces for a function. */
15567 /* If there are no return statements in a function with auto return type,
15568 the return type is void. But if the declared type is something like
15569 auto*, this is an error. */
15572 {
15574 {
15577 }
15580 {
15582 current_function_auto_return_pattern);
15585 }
15586 }
15588 // If this is a concept, check that the definition is reasonable.
15592 /* Lambda closure members are implicitly constexpr if possible. */
15596 = ((processing_template_decl
15600 /* Save constexpr function body before it gets munged by
15601 the NRV transformation. */
15604 /* Invoke the pre-genericize plugin before we start munging things. */
15608 /* Perform delayed folding before NRV transformation. */
15612 /* Set up the named return value optimization, if we can. Candidate
15613 variables are selected in check_return_expr. */
15615 {
15617 tree outer;
15620 /* This is only worth doing for fns that return in memory--and
15621 simpler, since we don't have to worry about promoted modes. */
15623 /* Only allow this for variables declared in the outer scope of
15624 the function so we know that their lifetime always ends with a
15625 return; see g++.dg/opt/nrv6.C. We could be more flexible if
15626 we were to do this optimization in tree-ssa. */
15632 }
15634 /* Remember that we were in class scope. */
15638 /* Must mark the RESULT_DECL as being in this function. */
15641 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
15642 to the FUNCTION_DECL node itself. */
15645 /* Save away current state, if appropriate. */
15649 /* Complain if there's just no return statement. */
15654 /* Don't complain if we abort or throw. */
15655 && !current_function_returns_abnormally
15656 /* Don't complain if there's an infinite loop. */
15657 && !current_function_infinite_loop
15658 /* Don't complain if we are declared noreturn. */
15662 /* Structor return values (if any) are set by the compiler. */
15666 {
15670 }
15672 /* Store the end of the function, so that we get good line number
15673 info for the epilogue. */
15676 /* Complain about parameters that are only set, but never otherwise used. */
15678 && !processing_template_decl
15681 {
15682 tree decl;
15685 decl;
15699 OPT_Wunused_but_set_parameter,
15702 }
15704 /* Complain about locally defined typedefs that are not used in this
15705 function. */
15708 /* Possibly warn about unused parameters. */
15710 && !processing_template_decl
15714 /* Genericize before inlining. */
15716 {
15719 /* Clear out the bits we don't need. */
15729 }
15730 /* Clear out the bits we don't need. */
15733 /* We're leaving the context of this function, so zap cfun. It's still in
15734 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
15738 /* If this is an in-class inline definition, we may have to pop the
15739 bindings for the template parameters that we added in
15740 maybe_begin_member_template_processing when start_function was
15741 called. */
15745 /* Leave the scope of the class. */
15751 /* Clean up. */
15756 }
15757 \f
15758 /* Create the FUNCTION_DECL for a function definition.
15759 DECLSPECS and DECLARATOR are the parts of the declaration;
15760 they describe the return type and the name of the function,
15761 but twisted together in a fashion that parallels the syntax of C.
15763 This function creates a binding context for the function body
15764 as well as setting up the FUNCTION_DECL in current_function_decl.
15766 Returns a FUNCTION_DECL on success.
15768 If the DECLARATOR is not suitable for a function (it defines a datum
15769 instead), we return 0, which tells yyparse to report a parse error.
15771 May return void_type_node indicating that this method is actually
15772 a friend. See grokfield for more details.
15774 Came here with a `.pushlevel' .
15776 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
15777 CHANGES TO CODE IN `grokfield'. */
15779 tree
15782 {
15790 {
15793 }
15798 /* Pass friends other than inline friend functions back. */
15803 {
15808 }
15817 /* We process method specializations in finish_struct_1. */
15819 {
15823 }
15826 {
15828 {
15831 }
15832 }
15838 }
15839 \f
15841 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
15842 we can lay it out later, when and if its type becomes complete.
15844 Also handle constexpr variables where the initializer involves
15845 an unlowered PTRMEM_CST because the class isn't complete yet. */
15847 void
15849 {
15852 /* Keep track of variables with incomplete types. */
15855 {
15863 /* RTTI TD entries are created while defining the type_info. */
15866 {
15869 }
15873 {
15874 /* When the outermost open class is complete we can resolve any
15875 pointers-to-members. */
15879 }
15880 }
15881 }
15883 /* Called when a class type (given by TYPE) is defined. If there are
15884 any existing VAR_DECLs whose type has been completed by this
15885 declaration, update them now. */
15887 void
15889 {
15894 {
15896 {
15903 {
15904 /* Complete the type of the variable. The VAR_DECL itself
15905 will be laid out in expand_expr. */
15908 }
15910 /* Remove this entry from the list. */
15912 }
15913 else
15914 ix++;
15915 }
15917 /* Check for pending declarations which may have abstract type. */
15919 }
15921 /* If DECL is of a type which needs a cleanup, build and return an
15922 expression to perform that cleanup here. Return NULL_TREE if no
15923 cleanup need be done. DECL can also be a _REF when called from
15924 split_nonconstant_init_1. */
15926 tree
15928 {
15929 tree type;
15930 tree attr;
15931 tree cleanup;
15933 /* Assume no cleanup is required. */
15939 /* Handle "__attribute__((cleanup))". We run the cleanup function
15940 before the destructor since the destructor is what actually
15941 terminates the lifetime of the object. */
15944 else
15947 {
15948 tree id;
15949 tree fn;
15950 tree arg;
15952 /* Get the name specified by the user for the cleanup function. */
15954 /* Look up the name to find the cleanup function to call. It is
15955 important to use lookup_name here because that is what is
15956 used in c-common.c:handle_cleanup_attribute when performing
15957 initial checks on the attribute. Note that those checks
15958 include ensuring that the function found is not an overloaded
15959 function, or an object with an overloaded call operator,
15960 etc.; we can rely on the fact that the function found is an
15961 ordinary FUNCTION_DECL. */
15969 }
15970 /* Handle ordinary C++ destructors. */
15973 {
15975 tree addr;
15976 tree call;
15980 else
15991 else
15993 }
15995 /* build_delete sets the location of the destructor call to the
15996 current location, even though the destructor is going to be
15997 called later, at the end of the current scope. This can lead to
15998 a "jumpy" behavior for users of debuggers when they step around
15999 the end of the block. So let's unset the location of the
16000 destructor call instead. */
16006 /* Treat objects with destructors as used; the destructor may do
16007 something substantive. */
16012 }
16014 \f
16015 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
16016 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
16017 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
16019 tree
16021 {
16022 tree fntype;
16023 tree args;
16037 fntype = (cp_build_type_attribute_variant
16039 fntype = (build_exception_variant
16044 }
16046 /* DECL was originally constructed as a non-static member function,
16047 but turned out to be static. Update it accordingly. */
16049 void
16051 {
16064 }
16066 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
16067 one of the language-independent trees. */
16069 enum cp_tree_node_structure_enum
16071 {
16073 {
16090 }
16091 }
16093 /* Build the void_list_node (void_type_node having been created). */
16094 tree
16096 {
16099 }
16101 bool
16103 {
16104 /* A missing noreturn is ok for the `main' function. */
16106 }
16108 /* Return the decl used to identify the COMDAT group into which DECL should
16109 be placed. */
16111 tree
16113 {
16114 /* Virtual tables, construction virtual tables, and virtual table
16115 tables all go in a single COMDAT group, named after the primary
16116 virtual table. */
16119 /* For all other DECLs, the COMDAT group is the mangled name of the
16120 declaration itself. */
16121 else
16122 {
16124 {
16125 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
16126 into the same section as the target function. In that case
16127 we must return target's name. */
16133 else
16135 }
16136 }
16139 }
16141 /* Returns the return type for FN as written by the user, which may include
16142 a placeholder for a deduced return type. */
16144 tree
16146 {
16149 {
16156 }
16158 }
16160 /* Returns true iff DECL was declared with an auto type and it has
16161 not yet been deduced to a real type. */
16163 bool
16165 {
16169 }
16171 /* Complain if DECL has an undeduced return type. */
16173 bool
16175 {
16177 {
16181 }
16183 }