| blob | 44aefd82b73eeaf12bd5cb91695692843632a96e |
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. */
54 /* Possible cases of bad specifiers type used by bad_specifiers. */
59 BSP_FIELD /* field */
60 };
99 static tree check_special_function_return_type
107 /* The following symbols are subsumed in the cp_global_trees array, and
108 listed here individually for documentation purposes.
110 C++ extensions
111 tree wchar_decl_node;
113 tree vtable_entry_type;
114 tree delta_type_node;
115 tree __t_desc_type_node;
117 tree class_type_node;
118 tree unknown_type_node;
120 Array type `vtable_entry_type[]'
122 tree vtbl_type_node;
123 tree vtbl_ptr_type_node;
125 Namespaces,
127 tree std_node;
128 tree abi_node;
130 A FUNCTION_DECL which can call `abort'. Not necessarily the
131 one that the user will declare, but sufficient to be called
132 by routines that want to abort the program.
134 tree abort_fndecl;
136 Used by RTTI
137 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
138 tree tinfo_var_id; */
142 /* Indicates that there is a type value in some namespace, although
143 that is not necessarily in scope at the moment. */
145 tree global_type_node;
147 /* The node that holds the "name" of the global scope. */
148 tree global_scope_name;
150 #define local_names cp_function_chain->x_local_names
152 /* A list of objects which have constructors or destructors
153 which reside in the global scope. The decl is stored in
154 the TREE_VALUE slot and the initializer is stored
155 in the TREE_PURPOSE slot. */
156 tree static_aggregates;
158 /* Like static_aggregates, but for thread_local variables. */
159 tree tls_aggregates;
161 /* -- end of C++ */
163 /* A node for the integer constant 2. */
165 tree integer_two_node;
167 /* Used only for jumps to as-yet undefined labels, since jumps to
168 defined labels can have their validity checked immediately. */
172 /* The binding level to which this entry is *currently* attached.
173 This is initially the binding level in which the goto appeared,
174 but is modified as scopes are closed. */
176 /* The head of the names list that was current when the goto appeared,
177 or the inner scope popped. These are the decls that will *not* be
178 skipped when jumping to the label. */
179 tree names_in_scope;
180 /* The location of the goto, for error reporting. */
181 location_t o_goto_locus;
182 /* True if an OpenMP structured block scope has been closed since
183 the goto appeared. This means that the branch from the label will
184 illegally exit an OpenMP scope. */
186 };
188 /* A list of all LABEL_DECLs in the function that have names. Here so
189 we can clear out their names' definitions at the end of the
190 function, and so we can check the validity of jumps to these labels. */
193 /* The decl itself. */
194 tree label_decl;
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. */
200 /* The head of the names list that was current when the label was
201 defined, or the inner scope popped. These are the decls that will
202 be skipped when jumping to the label. */
203 tree names_in_scope;
204 /* A vector of all decls from all binding levels that would be
205 crossed by a backward branch to the label. */
208 /* A list of uses of the label, before the label is defined. */
211 /* The following bits are set after the label is defined, and are
212 updated as scopes are popped. They indicate that a backward jump
213 to the label will illegally enter a scope of the given flavor. */
219 };
221 #define named_labels cp_function_chain->x_named_labels
222 \f
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* Whether the exception-specifier is part of a function type (i.e. C++17). */
231 /* States indicating how grokdeclarator() should handle declspecs marked
232 with __attribute__((deprecated)). An object declared as
233 __attribute__((deprecated)) suppresses warnings of uses of other
234 deprecated items. */
237 \f
238 /* A list of VAR_DECLs whose type was incomplete at the time the
239 variable was declared. */
242 tree decl;
243 tree incomplete_type;
244 };
248 \f
249 /* Returns the kind of template specialization we are currently
250 processing, given that it's declaration contained N_CLASS_SCOPES
251 explicit scope qualifications. */
253 tmpl_spec_kind
255 {
261 /* Scan through the template parameter scopes. */
265 {
266 /* If we see a specialization scope inside a parameter scope,
267 then something is wrong. That corresponds to a declaration
268 like:
270 template <class T> template <> ...
272 which is always invalid since [temp.expl.spec] forbids the
273 specialization of a class member template if the enclosing
274 class templates are not explicitly specialized as well. */
276 {
279 else
281 }
286 }
288 /* Handle explicit instantiations. */
290 {
292 /* We've seen a template parameter list during an explicit
293 instantiation. For example:
295 template <class T> template void f(int);
297 This is erroneous. */
299 else
301 }
304 /* We've not seen enough template headers to match all the
305 specialized classes present. For example:
307 template <class T> void R<T>::S<T>::f(int);
309 This is invalid; there needs to be one set of template
310 parameters for each class. */
313 /* We're processing a non-template declaration (even though it may
314 be a member of a template class.) For example:
316 template <class T> void S<T>::f(int);
318 The `class T' matches the `S<T>', leaving no template headers
319 corresponding to the `f'. */
322 /* We've got too many template headers. For example:
324 template <> template <class T> void f (T);
326 There need to be more enclosing classes. */
328 else
329 /* This must be a template. It's of the form:
331 template <class T> template <class U> void S<T>::f(U);
333 This is a specialization if the innermost level was a
334 specialization; otherwise it's just a definition of the
335 template. */
337 }
339 /* Exit the current scope. */
341 void
343 {
345 }
347 /* When a label goes out of scope, check to see if that label was used
348 in a valid manner, and issue any appropriate warnings or errors. */
350 static void
352 {
354 {
356 {
357 location_t location;
361 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
362 /* Avoid crashing later. */
364 }
365 else
367 }
370 }
372 /* Push all named labels into a vector, so that we can sort it on DECL_UID
373 to avoid code generation differences. */
375 int
377 {
380 }
382 /* Helper function to sort named label entries in a vector by DECL_UID. */
384 static int
386 {
394 }
396 /* At the end of a function, all labels declared within the function
397 go out of scope. BLOCK is the top-level block for the
398 function. */
400 static void
402 {
404 {
409 /* Push all the labels into a vector and sort them by DECL_UID,
410 so that gaps between DECL_UIDs don't affect code generation. */
415 {
420 /* Put the labels into the "variables" of the top-level block,
421 so debugger can see them. */
426 }
428 }
429 }
431 /* At the end of a block with local labels, restore the outer definition. */
433 static void
435 {
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;
586 restart:
598 /* We used to use KEEP == 2 to indicate that the new block should go
599 at the beginning of the list of blocks at this binding level,
600 rather than the end. This hack is no longer used. */
606 /* Any uses of undefined labels, and any defined labels, now operate
607 under constraints of next binding contour. */
612 /* Get the decls in the order they were written.
613 Usually current_binding_level->names is in reverse order.
614 But parameter decls were previously put in forward order. */
617 current_binding_level->names
619 else
622 /* If there were any declarations or structure tags in that level,
623 or if this level is a function body,
624 create a BLOCK to record them for the life of this function. */
626 /* Avoid function body block if possible. */
632 {
635 }
637 /* In each subblock, record that this is its superior. */
642 /* We still support the old for-scope rules, whereby the variables
643 in a init statement were in scope after the for-statement ended.
644 We only use the new rules if flag_new_for_scope is nonzero. */
645 leaving_for_scope
648 /* Before we remove the declarations first check for unused variables. */
653 {
654 /* There are cases where D itself is a TREE_LIST. See in
655 push_local_binding where the list of decls returned by
656 getdecls is built. */
668 {
673 // For -Wunused-but-set-variable leave references alone.
676 {
678 OPT_Wunused_but_set_variable,
681 }
682 }
683 }
685 /* Remove declarations for all the DECLs in this level. */
687 {
689 /* It's hard to make this ARM compatibility hack play nicely with
690 lambdas, and it really isn't necessary in C++11 mode. */
693 {
696 tree ns_binding;
703 else
707 /* We have something like:
709 int i;
710 for (int i; ;);
712 and we are leaving the `for' scope. There's no reason to
713 keep the binding of the inner `i' in this case. */
717 /* Here, we have something like:
719 typedef int I;
721 void f () {
722 for (int I; ;);
723 }
725 We must pop the for-scope binding so we know what's a
726 type and what isn't. */
728 else
729 {
730 /* Mark this VAR_DECL as dead so that we can tell we left it
731 there only for backward compatibility. */
734 /* Keep track of what should have happened when we
735 popped the binding. */
737 {
740 }
742 /* Add it to the list of dead variables in the next
743 outermost binding to that we can remove these when we
744 leave that binding. */
747 link);
749 /* Although we don't pop the cxx_binding, we do clear
750 its SCOPE since the scope is going away now. */
753 }
754 }
755 else
756 {
757 tree name;
759 /* Remove the binding. */
771 }
772 }
774 /* Remove declarations for any `for' variables from inner scopes
775 that we kept around. */
780 /* Restore the IDENTIFIER_TYPE_VALUEs. */
785 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
790 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
791 list if a `using' declaration put them there. The debugging
792 back ends won't understand OVERLOAD, so we remove them here.
793 Because the BLOCK_VARS are (temporarily) shared with
794 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
795 popped all the bindings. */
797 {
801 {
804 else
806 }
807 }
809 /* If the level being exited is the top level of a function,
810 check over all the labels. */
812 {
814 {
815 /* Since this is the top level block of a function, the vars are
816 the function's parameters. Don't leave them in the BLOCK
817 because they are found in the FUNCTION_DECL instead. */
820 }
821 else
823 }
827 {
828 tree stmt;
830 /* If this is a temporary binding created for a cleanup, then we'll
831 have pushed a statement list level. Pop that, create a new
832 BIND_EXPR for the block, and insert it into the stream. */
836 }
840 {
841 /* The current function is being defined, so its DECL_INITIAL
842 should be error_mark_node. */
846 {
848 {
851 }
852 else
854 }
855 }
857 current_binding_level->blocks
860 /* If we did not make a block for the level just exited,
861 any blocks made for inner levels
862 (since they cannot be recorded as subblocks in that level)
863 must be carried forward so they will later become subblocks
864 of something else. */
866 current_binding_level->blocks
869 /* Each and every BLOCK node created here in `poplevel' is important
870 (e.g. for proper debugging information) so if we created one
871 earlier, mark it as "used". */
875 /* All temporary bindings created for cleanups are popped silently. */
881 }
883 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
884 itself, calling F for each. The DATA is passed to F as well. */
886 static int
888 {
898 }
900 /* Walk all the namespaces, calling F for each. The DATA is passed to
901 F as well. */
903 int
905 {
907 }
909 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
911 int
913 {
920 {
921 tree decl;
931 {
933 OPT_Wunused_function,
936 }
937 }
939 /* Write out any globals that need to be output. */
941 }
943 /* Diagnose odr-used extern inline variables without definitions
944 in the current TU. */
945 int
947 {
950 tree decl;
962 }
963 \f
964 /* In C++, you don't have to write `struct S' to refer to `S'; you
965 can just use `S'. We accomplish this by creating a TYPE_DECL as
966 if the user had written `typedef struct S S'. Create and return
967 the TYPE_DECL for TYPE. */
969 tree
971 {
972 tree decl;
976 /* There are other implicit type declarations, like the one *within*
977 a class that allows you to write `S::S'. We must distinguish
978 amongst these. */
984 }
986 /* Remember a local name for name-mangling purposes. */
988 static void
990 {
1000 {
1003 {
1009 else
1015 }
1016 }
1020 }
1021 \f
1022 /* Subroutine of duplicate_decls: return truthvalue of whether
1023 or not types of these decls match.
1025 For C++, we must compare the parameter list so that `int' can match
1026 `int&' in a parameter position, but `int&' is not confused with
1027 `const int&'. */
1029 int
1031 {
1038 /* If the two DECLs are not even the same kind of thing, we're not
1039 interested in their types. */
1045 {
1050 tree r2;
1052 /* Specializations of different templates are different functions
1053 even if they have the same type. */
1068 /* A new declaration doesn't match a built-in one unless it
1069 is also extern "C". */
1077 /* A declaration with deduced return type should use its pre-deduction
1078 type for declaration matching. */
1082 {
1085 #ifndef NO_IMPLICIT_EXTERN_C
1088 #endif
1089 ))
1090 {
1094 }
1095 #ifndef NO_IMPLICIT_EXTERN_C
1103 {
1106 }
1107 #endif
1108 else
1109 types_match =
1115 }
1116 else
1119 /* The decls dont match if they correspond to two different versions
1120 of the same function. Disallow extern "C" functions to be
1121 versions for now. */
1126 {
1127 /* Mark functions as versions if necessary. Modify the mangled decl
1128 name if necessary. */
1133 {
1137 }
1139 {
1143 }
1146 }
1147 }
1149 {
1163 else
1164 // We don't need to check equivalently_constrained for variable and
1165 // function templates because we check it on the results.
1167 }
1168 else
1169 {
1170 /* Need to check scope for variable declaration (VAR_DECL).
1171 For typedef (TYPE_DECL), scope is ignored. */
1174 /* [dcl.link]
1175 Two declarations for an object with C language linkage
1176 with the same name (ignoring the namespace that qualify
1177 it) that appear in different namespace scopes refer to
1178 the same object. */
1188 else
1191 COMPARE_REDECLARATION);
1192 }
1194 // Normal functions can be constrained, as can variable partial
1195 // specializations.
1200 }
1202 /* If NEWDECL is `static' and an `extern' was seen previously,
1203 warn about it. OLDDECL is the previous declaration.
1205 Note that this does not apply to the C++ case of declaring
1206 a variable `extern const' and then later `const'.
1208 Don't complain about built-in functions, since they are beyond
1209 the user's control. */
1211 void
1213 {
1220 /* Don't get confused by static member functions; that's a different
1221 use of `static'. */
1226 /* If the old declaration was `static', or the new one isn't, then
1227 everything is OK. */
1231 /* It's OK to declare a builtin function as `static'. */
1240 }
1242 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1243 function templates. If their exception specifications do not
1244 match, issue a diagnostic. */
1246 static void
1248 tree old_decl)
1249 {
1253 /* Two default specs are equivalent, don't force evaluation. */
1263 /* [except.spec]
1265 If any declaration of a function has an exception-specification,
1266 all declarations, including the definition and an explicit
1267 specialization, of that function shall have an
1268 exception-specification with the same set of type-ids. */
1271 {
1279 /* We used to silently permit mismatched eh specs with
1280 -fno-exceptions, so make them a pedwarn now. */
1282 else
1287 }
1288 }
1290 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1291 Otherwise issue diagnostics. */
1293 static bool
1295 {
1305 {
1307 {
1308 /* Hide a built-in declaration. */
1312 }
1313 /* 7.1.5 [dcl.constexpr]
1314 Note: An explicit specialization can differ from the template
1315 declaration with respect to the constexpr specifier. */
1321 "redeclaration %qD differs in %<constexpr%> "
1326 }
1328 }
1330 // If OLDDECL and NEWDECL are concept declarations with the same type
1331 // (i.e., and template parameters), but different requirements,
1332 // emit diagnostics and return true. Otherwise, return false.
1335 {
1347 {
1352 {
1355 }
1356 }
1358 }
1360 /* DECL is a redeclaration of a function or function template. If
1361 it does have default arguments issue a diagnostic. Note: this
1362 function is used to enforce the requirements in C++11 8.3.6 about
1363 no default arguments in redeclarations. */
1365 static void
1367 {
1373 {
1375 "redeclaration of %q#D may not have default "
1378 }
1379 }
1381 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1383 DECL_ATTRIBUTES (fn)))
1385 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1386 If the redeclaration is invalid, a diagnostic is issued, and the
1387 error_mark_node is returned. Otherwise, OLDDECL is returned.
1389 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1390 returned.
1392 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1394 tree
1396 {
1400 tree new_template_info;
1407 /* If either the type of the new decl or the type of the old decl is an
1408 error_mark_node, then that implies that we have already issued an
1409 error (earlier) for some bogus type specification, and in that case,
1410 it is rather pointless to harass the user with yet more error message
1411 about the same declaration, so just pretend the types match here. */
1418 {
1429 }
1435 {
1439 else
1442 }
1444 /* Check for redeclaration and other discrepancies. */
1447 {
1450 {
1451 /* Avoid warnings redeclaring built-ins which have not been
1452 explicitly declared. */
1456 /* If you declare a built-in or predefined function name as static,
1457 the old definition is overridden, but optionally warn this was a
1458 bad choice of name. */
1460 {
1465 /* Discard the old built-in function. */
1467 }
1468 /* If the built-in is not ansi, then programs can override
1469 it even globally without an error. */
1474 else
1478 }
1480 {
1487 }
1489 {
1490 /* Avoid warnings redeclaring built-ins which have not been
1491 explicitly declared. */
1493 {
1496 /* A new declaration doesn't match a built-in one unless it
1497 is also extern "C". */
1509 /* Deal with fileptr_type_node. FILE type is not known
1510 at the time we create the builtins. */
1512 {
1519 {
1527 newdecl_is_friend);
1529 }
1530 }
1531 /* Likewise for const struct tm*. */
1533 {
1540 {
1548 newdecl_is_friend);
1550 }
1551 }
1556 OPT_Wbuiltin_declaration_mismatch,
1557 "declaration of %q+#D conflicts with built-in "
1559 }
1564 {
1565 /* A near match; override the builtin. */
1569 OPT_Wbuiltin_declaration_mismatch,
1570 "new declaration %q#D ambiguates built-in "
1572 else
1577 }
1578 else
1579 /* Discard the old built-in function. */
1582 /* Replace the old RTL to avoid problems with inlining. */
1584 }
1585 /* Even if the types match, prefer the new declarations type for
1586 built-ins which have not been explicitly declared, for
1587 exception lists, etc... */
1589 {
1596 }
1598 /* If a function is explicitly declared "throw ()", propagate that to
1599 the corresponding builtin. */
1604 {
1609 }
1611 /* Whether or not the builtin can throw exceptions has no
1612 bearing on this declarator. */
1616 {
1617 /* If a builtin function is redeclared as `static', merge
1618 the declarations, but make the original one static. */
1622 /* Make the old declaration consistent with the new one so
1623 that all remnants of the builtin-ness of this function
1624 will be banished. */
1627 }
1628 }
1630 {
1631 /* C++ Standard, 3.3, clause 4:
1632 "[Note: a namespace name or a class template name must be unique
1633 in its declarative region (7.3.2, clause 14). ]" */
1640 {
1645 {
1646 /* We do nothing special here, because C++ does such nasty
1647 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1648 get shadowed, and know that if we need to find a TYPE_DECL
1649 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1650 slot of the identifier. */
1652 }
1659 }
1668 }
1670 {
1672 /* These are certainly not duplicate declarations; they're
1673 from different scopes. */
1677 {
1678 /* The name of a class template may not be declared to refer to
1679 any other template, class, function, object, namespace, value,
1680 or type in the same scope. */
1683 {
1688 }
1695 /* Template functions can be disambiguated by
1696 return type. */
1699 // Template functions can also be disambiguated by
1700 // constraints.
1702 {
1706 }
1710 }
1712 {
1714 {
1716 newdecl);
1720 }
1721 /* For function versions, params and types match, but they
1722 are not ambiguous. */
1725 // The functions have the same parameter types.
1728 // And the same constraints.
1730 {
1735 }
1736 else
1738 }
1739 else
1740 {
1745 }
1746 }
1756 /* It's OK to have a template specialization and a non-template
1757 with the same type, or to have specializations of two
1758 different templates with the same type. Note that if one is a
1759 specialization, and the other is an instantiation of the same
1760 template, that we do not exit at this point. That situation
1761 can occur if we instantiate a template class, and then
1762 specialize one of its methods. This situation is valid, but
1763 the declarations must be merged in the usual way. */
1770 /* One of the declarations is a template instantiation, and the
1771 other is not a template at all. That's OK. */
1774 {
1775 /* In [namespace.alias] we have:
1777 In a declarative region, a namespace-alias-definition can be
1778 used to redefine a namespace-alias declared in that declarative
1779 region to refer only to the namespace to which it already
1780 refers.
1782 Therefore, if we encounter a second alias directive for the same
1783 alias, we can just ignore the second directive. */
1788 /* [namespace.alias]
1790 A namespace-name or namespace-alias shall not be declared as
1791 the name of any other entity in the same declarative region.
1792 A namespace-name defined at global scope shall not be
1793 declared as the name of any other entity in any global scope
1794 of the program. */
1799 }
1800 else
1801 {
1804 {
1812 }
1817 {
1818 /* Prototype decl follows defn w/o prototype. */
1823 }
1826 {
1827 /* [dcl.link]
1828 If two declarations of the same function or object
1829 specify different linkage-specifications ..., the program
1830 is ill-formed.... Except for functions with C++ linkage,
1831 a function declaration without a linkage specification
1832 shall not precede the first linkage specification for
1833 that function. A function can be declared without a
1834 linkage specification after an explicit linkage
1835 specification has been seen; the linkage explicitly
1836 specified in the earlier declaration is not affected by
1837 such a function declaration.
1839 DR 563 raises the question why the restrictions on
1840 functions should not also apply to objects. Older
1841 versions of G++ silently ignore the linkage-specification
1842 for this example:
1844 namespace N {
1845 extern int i;
1846 extern "C" int i;
1847 }
1849 which is clearly wrong. Therefore, we now treat objects
1850 like functions. */
1852 {
1853 /* There is no explicit linkage-specification, so we use
1854 the linkage from the previous declaration. */
1858 }
1859 else
1860 {
1866 }
1867 }
1870 ;
1872 {
1873 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1876 as FUNCTION_DECLs. */
1878 /* C++11 8.3.6/6.
1879 Default arguments for a member function of a class
1880 template shall be specified on the initial declaration
1881 of the member function within the class template. */
1884 else
1885 {
1893 {
1896 {
1898 "default argument given for parameter "
1902 olddecl);
1903 }
1904 else
1905 {
1910 olddecl);
1911 }
1912 }
1913 }
1914 }
1915 }
1917 /* Do not merge an implicit typedef with an explicit one. In:
1919 class A;
1920 ...
1921 typedef class A A __attribute__ ((foo));
1923 the attribute should apply only to the typedef. */
1929 /* If new decl is `static' and an `extern' was seen previously,
1930 warn about it. */
1936 /* We have committed to returning 1 at this point. */
1938 {
1939 /* Now that functions must hold information normally held
1940 by field decls, there is extra work to do so that
1941 declaration information does not get destroyed during
1942 definition. */
1956 SET_OVERLOADED_OPERATOR_CODE
1960 /* Optionally warn about more than one declaration for the same
1961 name, but don't warn about a function declaration followed by a
1962 definition. */
1965 /* Don't warn about extern decl followed by definition. */
1967 /* Don't warn about friends, let add_friend take care of it. */
1969 /* Don't warn about declaration followed by specialization. */
1972 {
1974 OPT_Wredundant_decls,
1976 newdecl))
1979 }
1983 {
1985 {
1989 }
1991 }
1992 }
1994 /* Deal with C++: must preserve virtual function table size. */
1996 {
2006 }
2008 /* Copy all the DECL_... slots specified in the new decl
2009 except for any that we copy here from the old type. */
2014 {
2020 {
2023 }
2024 }
2027 {
2028 tree old_result;
2029 tree new_result;
2041 {
2042 /* Per C++11 8.3.6/4, default arguments cannot be added in later
2043 declarations of a function template. */
2052 {
2055 else
2067 }
2068 else
2069 {
2075 }
2076 }
2078 /* If the new declaration is a definition, update the file and
2079 line information on the declaration, and also make
2080 the old declaration the same definition. */
2082 {
2088 {
2089 tree parm;
2095 }
2096 }
2099 }
2102 {
2106 /* Automatically handles default parameters. */
2108 tree newtype;
2110 /* For typedefs use the old type, as the new type's DECL_NAME points
2111 at newdecl, which will be ggc_freed. */
2113 {
2114 /* But NEWTYPE might have an attribute, honor that. */
2119 {
2123 }
2125 /* And remove the new type from the variants list. */
2127 {
2132 {
2135 }
2136 }
2137 }
2138 else
2139 /* Merge the data types specified in the two decls. */
2143 {
2145 /* For already initialized vars, TREE_READONLY could have been
2146 cleared in cp_finish_decl, because the var needs runtime
2147 initialization or destruction. Make sure not to set
2148 TREE_READONLY on it again. */
2162 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2165 {
2166 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2171 }
2172 }
2174 /* An explicit specialization of a function template or of a member
2175 function of a class template can be declared transaction_safe
2176 independently of whether the corresponding template entity is declared
2177 transaction_safe. */
2190 /* Lay the type out, unless already done. */
2204 /* Merge the type qualifiers. */
2212 /* Merge deprecatedness. */
2216 /* Preserve function specific target and optimization options */
2218 {
2228 }
2230 /* Merge the initialization information. */
2233 {
2237 {
2240 }
2241 }
2244 {
2256 /* Keep the old RTL. */
2258 }
2261 {
2262 /* Keep the old RTL. We cannot keep the old RTL if the old
2263 declaration was for an incomplete object and the new
2264 declaration is not since many attributes of the RTL will
2265 change. */
2267 }
2268 }
2269 /* If cannot merge, then use the new type and qualifiers,
2270 and don't preserve the old rtl. */
2271 else
2272 {
2273 /* Clean out any memory we had of the old declaration. */
2283 }
2285 /* Merge the storage class information. */
2298 {
2307 {
2314 }
2317 {
2321 }
2326 /* If the OLDDECL is an instantiation and/or specialization,
2327 then the NEWDECL must be too. But, it may not yet be marked
2328 as such if the caller has created NEWDECL, but has not yet
2329 figured out that it is a redeclaration. */
2333 /* Don't really know how much of the language-specific
2334 values we should copy from old to new. */
2341 {
2345 {
2349 /* Remember the presence of explicit specialization args. */
2352 }
2354 }
2355 /* Only functions have these fields. */
2357 {
2362 /* DECL_THUNKS is only valid for virtual functions,
2363 otherwise it is a DECL_FRIEND_CONTEXT. */
2366 }
2367 /* Only variables have this field. */
2371 }
2374 {
2375 tree parm;
2377 /* Merge parameter attributes. */
2386 }
2390 {
2391 /* If newdecl is not a specialization, then it is not a
2392 template-related function at all. And that means that we
2393 should have exited above, returning 0. */
2397 /* From [temp.expl.spec]:
2399 If a template, a member template or the member of a class
2400 template is explicitly specialized then that
2401 specialization shall be declared before the first use of
2402 that specialization that would cause an implicit
2403 instantiation to take place, in every translation unit in
2404 which such a use occurs. */
2406 olddecl);
2412 /* Don't propagate visibility from the template to the
2413 specialization here. We'll do that in determine_visibility if
2414 appropriate. */
2417 /* [temp.expl.spec/14] We don't inline explicit specialization
2418 just because the primary template says so. */
2420 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2421 the always_inline attribute. */
2424 {
2427 else
2431 }
2432 }
2434 {
2435 /* Never inline re-defined extern inline functions.
2436 FIXME: this could be better handled by keeping both
2437 function as separate declarations. */
2439 }
2440 else
2441 {
2443 {
2447 }
2449 ;
2463 }
2465 /* Preserve abstractness on cloned [cd]tors. */
2468 /* Update newdecl's parms to point at olddecl. */
2474 {
2478 }
2480 {
2481 /* These need to be copied so that the names are available.
2482 Note that if the types do match, we'll preserve inline
2483 info and other bits, but if not, we won't. */
2486 }
2487 /* If redeclaring a builtin function, it stays built in
2488 if newdecl is a gnu_inline definition, or if newdecl is just
2489 a declaration. */
2492 {
2495 /* If we're keeping the built-in definition, keep the rtl,
2496 regardless of declaration matches. */
2499 {
2502 {
2503 /* If a compatible prototype of these builtin functions
2504 is seen, assume the runtime implements it with the
2505 expected semantics. */
2514 }
2515 }
2516 }
2518 /* If defining a function declared with other language
2519 linkage, use the previously declared language linkage. */
2522 {
2524 /* Don't clear out the arguments if we're just redeclaring a
2525 function. */
2528 }
2529 }
2533 /* Now preserve various other info from the definition. */
2539 /* Warn about conflicting visibility specifications. */
2543 {
2545 "%qD: visibility attribute ignored because it "
2549 }
2550 /* Choose the declaration which specified visibility. */
2552 {
2555 }
2556 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2557 so keep this behavior. */
2559 {
2562 }
2563 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2565 {
2568 }
2573 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2574 with that from NEWDECL below. */
2576 {
2580 }
2582 /* Merge the USED information. */
2588 {
2593 }
2599 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2600 to olddecl and deleted. */
2603 {
2604 /* Set the flag for newdecl so that it gets copied to olddecl. */
2606 /* newdecl will be purged after copying to olddecl and is no longer
2607 a version. */
2609 }
2612 {
2626 /* Preserve symtab node mapping. */
2630 /* If newdecl is a template instantiation, it is possible that
2631 the following sequence of events has occurred:
2633 o A friend function was declared in a class template. The
2634 class template was instantiated.
2636 o The instantiation of the friend declaration was
2637 recorded on the instantiation list, and is newdecl.
2639 o Later, however, instantiate_class_template called pushdecl
2640 on the newdecl to perform name injection. But, pushdecl in
2641 turn called duplicate_decls when it discovered that another
2642 declaration of a global function with the same name already
2643 existed.
2645 o Here, in duplicate_decls, we decided to clobber newdecl.
2647 If we're going to do that, we'd better make sure that
2648 olddecl, and not newdecl, is on the list of
2649 instantiations so that if we try to do the instantiation
2650 again we won't get the clobbered declaration. */
2652 new_template_info,
2653 olddecl);
2654 }
2655 else
2656 {
2663 {
2671 {
2684 }
2692 }
2693 }
2696 {
2700 {
2701 /* Merge the section attribute.
2702 We want to issue an error if the sections conflict but that must be
2703 done later in decl_attributes since we are called before attributes
2704 are assigned. */
2709 {
2713 else
2717 }
2718 }
2722 {
2726 }
2727 }
2733 {
2736 }
2738 /* NEWDECL contains the merged attribute lists.
2739 Update OLDDECL to be the same. */
2742 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2743 so that encode_section_info has a chance to look at the new decl
2744 flags and attributes. */
2751 /* The NEWDECL will no longer be needed. Because every out-of-class
2752 declaration of a member results in a call to duplicate_decls,
2753 freeing these nodes represents in a significant savings.
2755 Before releasing the node, be sore to remove function from symbol
2756 table that might have been inserted there to record comdat group.
2757 Be sure to however do not free DECL_STRUCT_FUNCTION because this
2758 structure is shared in between newdecl and oldecl. */
2762 {
2766 }
2768 /* Remove the associated constraints for newdecl, if any, before
2769 reclaiming memory. */
2776 }
2777 \f
2778 /* Return zero if the declaration NEWDECL is valid
2779 when the declaration OLDDECL (assumed to be for the same name)
2780 has already been seen.
2781 Otherwise return an error message format string with a %s
2782 where the identifier should go. */
2786 {
2788 {
2789 /* Because C++ can put things into name space for free,
2790 constructs like "typedef struct foo { ... } foo"
2791 would look like an erroneous redeclaration. */
2794 else
2796 }
2798 {
2799 /* If this is a pure function, its olddecl will actually be
2800 the original initialization to `0' (which we force to call
2801 abort()). Don't complain about redefinition in this case. */
2806 /* If both functions come from different namespaces, this is not
2807 a redeclaration - this is a conflict with a used function. */
2813 /* We'll complain about linkage mismatches in
2814 warn_extern_redeclared_static. */
2816 /* Defining the same name twice is no good. */
2819 {
2825 }
2828 {
2833 {
2837 else
2840 }
2841 }
2843 check_abi_tag_redeclaration
2848 }
2850 {
2854 {
2859 }
2877 {
2882 {
2886 else
2889 }
2890 }
2892 /* Core issue #226 (C++0x):
2894 If a friend function template declaration specifies a
2895 default template-argument, that declaration shall be a
2896 definition and shall be the only declaration of the
2897 function template in the translation unit. */
2908 }
2914 {
2915 /* Only variables can be thread-local, and all declarations must
2916 agree on this property. */
2920 else
2923 }
2925 {
2926 /* The objects have been declared at namespace scope. If either
2927 is a member of an anonymous union, then this is an invalid
2928 redeclaration. For example:
2930 int i;
2931 union { int i; };
2933 is invalid. */
2937 /* If at least one declaration is a reference, there is no
2938 conflict. For example:
2940 int i = 3;
2941 extern int i;
2943 is valid. */
2947 /* Static data member declared outside a class definition
2948 if the variable is defined within the class with constexpr
2949 specifier is declaration rather than definition (and
2950 deprecated). */
2955 {
2957 /* For now, only warn with explicit -Wdeprecated. */
2960 "redundant redeclaration of %<constexpr%> static "
2965 }
2967 /* Reject two definitions. */
2969 }
2970 else
2971 {
2972 /* Objects declared with block scope: */
2973 /* Reject two definitions, and reject a definition
2974 together with an external reference. */
2978 }
2979 }
2980 \f
2981 /* Hash and equality functions for the named_label table. */
2983 hashval_t
2985 {
2987 }
2989 bool
2991 {
2993 }
2995 /* Create a new label, named ID. */
2997 static tree
2999 {
3001 tree decl;
3009 /* Say where one reference is to the label, for the sake of the
3010 error if it is not defined. */
3013 /* Record the fact that this identifier is bound to this label. */
3016 /* Create the label htab for the function on demand. */
3020 /* Record this label on the list of labels used in this function.
3021 We do this before calling make_label_decl so that we get the
3022 IDENTIFIER_LABEL_VALUE before the new label is declared. */
3031 }
3033 /* Look for a label named ID in the current function. If one cannot
3034 be found, create one. (We keep track of used, but undefined,
3035 labels, and complain about them at the end of a function.) */
3037 static tree
3039 {
3040 tree decl;
3042 /* You can't use labels at global scope. */
3044 {
3047 }
3049 /* See if we've already got this label. */
3056 }
3058 /* Wrapper for lookup_label_1. */
3060 tree
3062 {
3063 tree ret;
3068 }
3070 /* Declare a local label named ID. */
3072 tree
3074 {
3075 tree decl;
3076 cp_label_binding bind;
3078 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
3079 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
3087 }
3089 /* Returns nonzero if it is ill-formed to jump past the declaration of
3090 DECL. Returns 2 if it's also a real problem. */
3092 static int
3094 {
3095 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
3096 with automatic storage duration is not in scope to a point where it is
3097 in scope is ill-formed unless the variable has scalar type, class type
3098 with a trivial default constructor and a trivial destructor, a
3099 cv-qualified version of one of these types, or an array of one of the
3100 preceding types and is declared without an initializer (8.5). */
3115 }
3117 /* A subroutine of check_previous_goto_1 and check_goto to identify a branch
3118 to the user. */
3120 static bool
3122 diagnostic_t diag_kind)
3123 {
3124 bool complained
3130 }
3132 /* Check that a single previously seen jump to a newly defined label
3133 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
3134 the jump context; NAMES are the names in scope in LEVEL at the jump
3135 context; LOCUS is the source position of the jump or 0. Returns
3136 true if all is well. */
3138 static bool
3141 {
3148 {
3154 }
3157 {
3163 {
3169 {
3171 DK_PERMERROR);
3173 }
3175 {
3179 else
3181 " enters scope of %q#D which has "
3183 }
3184 }
3189 {
3191 {
3193 DK_ERROR);
3195 }
3197 {
3200 else
3202 }
3204 }
3206 {
3208 {
3210 DK_ERROR);
3212 }
3216 }
3218 {
3220 {
3222 DK_ERROR);
3224 }
3229 }
3232 {
3234 {
3236 DK_ERROR);
3238 }
3243 }
3244 }
3247 }
3249 static void
3251 {
3255 }
3257 static bool
3259 {
3261 }
3263 /* Check that a new jump to a label DECL is OK. Called by
3264 finish_goto_stmt. */
3266 void
3268 {
3272 tree bad;
3275 /* We can't know where a computed goto is jumping.
3276 So we assume that it's OK. */
3280 /* We didn't record any information about this label when we created it,
3281 and there's not much point since it's trivial to analyze as a return. */
3289 /* If the label hasn't been defined yet, defer checking. */
3291 {
3294 /* Don't bother creating another use if the last goto had the
3295 same data, and will therefore create the same set of errors. */
3309 }
3314 {
3322 }
3325 {
3329 {
3330 /* Can't skip init of __exception_info. */
3332 {
3336 }
3340 }
3342 {
3346 else
3348 " enters scope of %q#D which has "
3350 }
3351 }
3354 {
3363 }
3366 {
3369 }
3371 {
3374 {
3378 {
3380 {
3385 }
3389 }
3390 }
3391 }
3392 }
3394 /* Check that a return is ok wrt OpenMP structured blocks.
3395 Called by finish_return_stmt. Returns true if all is well. */
3397 bool
3399 {
3403 {
3406 }
3410 }
3412 /* Define a label, specifying the location in the source file.
3413 Return the LABEL_DECL node for the label. */
3415 static tree
3417 {
3420 tree decl;
3428 /* After labels, make any new cleanups in the function go into their
3429 own new (temporary) binding contour. */
3439 {
3442 }
3443 else
3444 {
3447 /* Mark label as having been defined. */
3449 /* Say where in the source. */
3458 }
3461 }
3463 /* Wrapper for define_label_1. */
3465 tree
3467 {
3468 tree ret;
3473 }
3476 struct cp_switch
3477 {
3480 /* The SWITCH_STMT being built. */
3481 tree switch_stmt;
3482 /* A splay-tree mapping the low element of a case range to the high
3483 element, or NULL_TREE if there is no high element. Used to
3484 determine whether or not a new case label duplicates an old case
3485 label. We need a tree, rather than simply a hash table, because
3486 of the GNU case range extension. */
3487 splay_tree cases;
3488 /* Remember whether there was a case value that is outside the
3489 range of the original type of the controlling expression. */
3491 };
3493 /* A stack of the currently active switch statements. The innermost
3494 switch statement is on the top of the stack. There is no need to
3495 mark the stack for garbage collection because it is only active
3496 during the processing of the body of a function, and we never
3497 collect at that point. */
3501 /* Called right after a switch-statement condition is parsed.
3502 SWITCH_STMT is the switch statement being parsed. */
3504 void
3506 {
3514 }
3516 void
3518 {
3520 location_t switch_location;
3522 /* Emit warnings as needed. */
3524 const bool bool_cond_p
3536 }
3538 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3539 condition. Note that if TYPE and VALUE are already integral we don't
3540 really do the conversion because the language-independent
3541 warning/optimization code will work better that way. */
3543 static tree
3545 {
3552 {
3555 value = (perform_implicit_conversion_flags
3558 }
3560 }
3562 /* Note that we've seen a definition of a case label, and complain if this
3563 is a bad place for one. */
3565 tree
3567 {
3570 tree type;
3573 {
3574 tree label;
3576 /* For templates, just add the case label; we'll do semantic
3577 analysis at instantiation-time. */
3580 }
3582 /* Find the condition on which this switch statement depends. */
3599 /* After labels, make any new cleanups in the function go into their
3600 own new (temporary) binding contour. */
3607 }
3608 \f
3610 tree scope;
3611 tree name;
3612 tree template_id;
3615 };
3618 {
3621 /* Hash a TYPENAME_TYPE. */
3623 static hashval_t
3625 {
3626 hashval_t hash;
3632 }
3634 /* Compare two TYPENAME_TYPEs. */
3636 static bool
3638 {
3644 }
3645 };
3647 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3648 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3650 Returns the new TYPENAME_TYPE. */
3654 static tree
3657 {
3658 tree t;
3659 tree d;
3660 typename_info ti;
3662 hashval_t hash;
3677 /* See if we already have this type. */
3681 else
3682 {
3683 /* Build the TYPENAME_TYPE. */
3690 /* Build the corresponding TYPE_DECL. */
3697 /* Store it in the hash table. */
3700 /* TYPENAME_TYPEs must always be compared structurally, because
3701 they may or may not resolve down to another type depending on
3702 the currently open classes. */
3704 }
3707 }
3709 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3710 provided to name the type. Returns an appropriate type, unless an
3711 error occurs, in which case error_mark_node is returned. If we
3712 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3713 return that, rather than the _TYPE it corresponds to, in other
3714 cases we look through the type decl. If TF_ERROR is set, complain
3715 about errors, otherwise be quiet. */
3717 tree
3719 tsubst_flags_t complain)
3720 {
3721 tree fullname;
3722 tree t;
3731 {
3736 else
3737 /* Create a TEMPLATE_ID_EXPR for the type. */
3741 }
3748 {
3753 {
3757 }
3758 }
3760 {
3764 }
3769 {
3773 }
3775 /* When the CONTEXT is a dependent type, NAME could refer to a
3776 dependent base class of CONTEXT. But look inside it anyway
3777 if CONTEXT is a currently open scope, in case it refers to a
3778 member of the current instantiation or a non-dependent base;
3779 lookup will stop when we hit a dependent base. */
3781 /* We should only set WANT_TYPE when we're a nested typename type.
3782 Then we can give better diagnostics if we find a non-type. */
3784 else
3793 {
3795 {
3798 else
3801 }
3803 }
3805 /* Pull out the template from an injected-class-name (or multiple). */
3810 {
3812 {
3815 }
3817 }
3820 {
3825 }
3827 {
3832 }
3837 /* If we are currently parsing a template and if T is a typedef accessed
3838 through CONTEXT then we need to remember and check access of T at
3839 template instantiation time. */
3854 }
3856 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3857 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3858 in which case error_mark_node is returned.
3860 If PARM_LIST is non-NULL, also make sure that the template parameter
3861 list of TEMPLATE_DECL matches.
3863 If COMPLAIN zero, don't complain about any errors that occur. */
3865 tree
3867 tsubst_flags_t complain)
3868 {
3869 tree t;
3870 tree d;
3880 {
3890 {
3894 }
3898 {
3900 {
3904 }
3906 }
3909 complain))
3913 }
3915 /* Build the UNBOUND_CLASS_TEMPLATE. */
3921 /* Build the corresponding TEMPLATE_DECL. */
3930 }
3932 \f
3934 /* Push the declarations of builtin types into the namespace.
3935 RID_INDEX is the index of the builtin type in the array
3936 RID_POINTERS. NAME is the name used when looking up the builtin
3937 type. TYPE is the _TYPE node for the builtin type. */
3939 void
3942 tree type)
3943 {
3952 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3953 eliminated. Built-in types should not be looked up name; their
3954 names are keywords that the parser can recognize. However, there
3955 is code in c-common.c that uses identifier_global_value to look
3956 up built-in types by name. */
3958 {
3962 }
3964 {
3966 {
3969 }
3971 }
3978 }
3980 /* Push a type into the namespace so that the back ends ignore it. */
3982 static void
3984 {
3987 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3994 }
3996 /* A string for which we should create an IDENTIFIER_NODE at
3997 startup. */
3999 struct predefined_identifier
4000 {
4001 /* The name of the identifier. */
4003 /* The place where the IDENTIFIER_NODE should be stored. */
4005 /* Nonzero if this is the name of a constructor or destructor. */
4007 };
4009 /* Create all the predefined identifiers. */
4011 static void
4013 {
4016 /* A table of identifiers to create at startup. */
4020 /* Some of these names have a trailing space so that it is
4021 impossible for them to conflict with names written by users. */
4041 };
4044 {
4048 }
4049 }
4051 /* Create the predefined scalar types of C,
4052 and some nodes representing standard constants (0, 1, (void *)0).
4053 Initialize the global binding level.
4054 Make definitions for built-in primitive functions. */
4056 void
4058 {
4059 tree void_ftype;
4060 tree void_ftype_ptr;
4062 /* Create all the identifiers we need. */
4065 /* Create the global variables. */
4070 /* Enter the global namespace. */
4073 void_type_node);
4076 debug_hooks->register_main_translation_unit
4084 /* Initially, C. */
4087 /* Create the `std' namespace. */
4107 #if 0
4109 #endif
4118 void_ftype_ptr
4121 /* C++ extensions */
4126 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
4129 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
4130 result. */
4137 {
4138 /* Make sure we get a unique function type, so we can give
4139 its pointer type a name. (This wins for gdb.) */
4146 }
4149 vtbl_type_node
4168 /* Now, C++. */
4173 {
4176 }
4182 {
4185 tree ptr_ftype_sizetype;
4186 tree new_eh_spec;
4188 ptr_ftype_sizetype
4191 {
4192 tree bad_alloc_id;
4193 tree bad_alloc_type_node;
4194 tree bad_alloc_decl;
4200 bad_alloc_decl
4205 new_eh_spec
4207 }
4208 else
4211 /* Ensure attribs.c is initialized. */
4214 /* Ensure constraint.cc is initialized. */
4218 NULL_TREE);
4221 extvisattr);
4235 {
4236 /* Also push the sized deallocation variants:
4237 void operator delete(void*, std::size_t) throw();
4238 void operator delete[](void*, std::size_t) throw(); */
4239 tree void_ftype_ptr_size
4243 extvisattr);
4247 }
4250 {
4257 /* operator new (size_t, align_val_t); */
4269 /* operator delete (void *, align_val_t); */
4278 {
4279 /* operator delete (void *, size_t, align_val_t); */
4282 NULL_TREE);
4287 }
4288 }
4300 }
4302 abort_fndecl
4306 /* Perform other language dependent initializations. */
4320 /* Show we use EH for cleanups. */
4323 }
4325 /* Generate an initializer for a function naming variable from
4326 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4327 filled in with the type of the init. */
4329 tree
4331 {
4333 tree type;
4338 {
4342 }
4351 else
4355 }
4357 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4358 the decl, LOC is the location to give the decl, NAME is the
4359 initialization string and TYPE_DEP indicates whether NAME depended
4360 on the type of the function. We make use of that to detect
4361 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4362 at the point of first use, so we mustn't push the decl now. */
4364 static tree
4366 {
4369 tree type;
4376 /* As we're using pushdecl_with_scope, we must set the context. */
4386 {
4394 LOOKUP_ONLYCONVERTING);
4395 }
4396 else
4397 {
4400 }
4403 }
4405 static tree
4407 {
4416 /* Runtime library routines are, by definition, available in an
4417 external shared object. */
4425 else
4428 /* A function in the user's namespace should have an explicit
4429 declaration before it is used. Mark the built-in function as
4430 anticipated but not actually declared. */
4434 {
4437 /* Treat __*_chk fortification functions as anticipated as well,
4438 unless they are __builtin_*. */
4443 }
4446 }
4448 tree
4450 {
4453 /* All builtins that don't begin with an '_' should additionally
4454 go in the 'std' namespace. */
4456 {
4461 }
4464 }
4466 /* Like cxx_builtin_function, but guarantee the function is added to the global
4467 scope. This is to allow function specific options to add new machine
4468 dependent builtins when the target ISA changes via attribute((target(...)))
4469 which saves space on program startup if the program does not use non-generic
4470 ISAs. */
4472 tree
4474 {
4478 /* All builtins that don't begin with an '_' should additionally
4479 go in the 'std' namespace. */
4481 {
4486 }
4489 }
4491 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4492 function. Not called directly. */
4494 static tree
4497 {
4504 /* Runtime library routines are, by definition, available in an
4505 external shared object. */
4510 }
4512 /* Returns the _DECL for a library function with C++ linkage. */
4514 static tree
4517 {
4522 }
4524 /* Like build_library_fn, but takes a C string instead of an
4525 IDENTIFIER_NODE. */
4527 tree
4529 {
4531 }
4533 /* Like build_cp_library_fn, but takes a C string instead of an
4534 IDENTIFIER_NODE. */
4536 tree
4538 {
4540 ecf_flags);
4541 }
4543 /* Like build_library_fn, but also pushes the function so that we will
4544 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4545 may throw exceptions listed in RAISES. */
4547 tree
4549 {
4550 tree fn;
4558 }
4560 /* Like build_cp_library_fn, but also pushes the function so that it
4561 will be found by normal lookup. */
4563 static tree
4566 {
4568 operator_code,
4574 }
4576 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4577 a FUNCTION_TYPE. */
4579 tree
4581 {
4584 }
4586 /* Like push_library_fn, but also note that this function throws
4587 and does not return. Used for __throw_foo and the like. */
4589 tree
4591 {
4594 }
4595 \f
4596 /* When we call finish_struct for an anonymous union, we create
4597 default copy constructors and such. But, an anonymous union
4598 shouldn't have such things; this function undoes the damage to the
4599 anonymous union type T.
4601 (The reason that we create the synthesized methods is that we don't
4602 distinguish `union { int i; }' from `typedef union { int i; } U'.
4603 The first is an anonymous union; the second is just an ordinary
4604 union type.) */
4606 void
4608 {
4611 /* Wipe out memory of synthesized methods. */
4619 /* Splice the implicitly generated functions out of the TYPE_METHODS
4620 list. */
4623 {
4626 else
4628 }
4630 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4632 {
4638 else
4641 }
4643 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4644 assignment operators (because they cannot have these methods themselves).
4645 For anonymous unions this is already checked because they are not allowed
4646 in any union, otherwise we have to check it. */
4648 {
4653 {
4656 {
4666 }
4667 }
4668 }
4669 }
4671 /* Warn for an attribute located at LOCATION that appertains to the
4672 class type CLASS_TYPE that has not been properly placed after its
4673 class-key, in it class-specifier. */
4675 void
4677 tree class_type)
4678 {
4682 "attribute ignored in declaration "
4687 }
4689 /* Make sure that a declaration with no declarator is well-formed, i.e.
4690 just declares a tagged type or anonymous union.
4692 Returns the type declared; or NULL_TREE if none. */
4694 tree
4697 {
4700 /* If a class, struct, or enum type is declared by the DECLSPECS
4701 (i.e, if a class-specifier, enum-specifier, or non-typename
4702 elaborated-type-specifier appears in the DECLSPECS),
4703 DECLARED_TYPE is set to the corresponding type. */
4710 {
4716 }
4729 {
4731 "%<auto%> can only be specified for variables "
4734 }
4735 /* Check for an anonymous union. */
4738 {
4739 /* 7/3 In a simple-declaration, the optional init-declarator-list
4740 can be omitted only when declaring a class (clause 9) or
4741 enumeration (7.2), that is, when the decl-specifier-seq contains
4742 either a class-specifier, an elaborated-type-specifier with
4743 a class-key (9.1), or an enum-specifier. In these cases and
4744 whenever a class-specifier or enum-specifier is present in the
4745 decl-specifier-seq, the identifiers in these specifiers are among
4746 the names being declared by the declaration (as class-name,
4747 enum-names, or enumerators, depending on the syntax). In such
4748 cases, and except for the declaration of an unnamed bit-field (9.6),
4749 the decl-specifier-seq shall introduce one or more names into the
4750 program, or shall redeclare a name introduced by a previous
4751 declaration. [Example:
4752 enum { }; // ill-formed
4753 typedef class { }; // ill-formed
4754 --end example] */
4756 {
4759 }
4766 }
4768 else
4769 {
4777 && (!current_class_type
4786 "a storage class can only be specified for objects "
4790 "%<const%> can only be specified for objects and "
4794 "%<volatile%> can only be specified for objects and "
4798 "%<__restrict%> can only be specified for objects and "
4802 "%<__thread%> can only be specified for objects "
4810 }
4813 {
4814 location_t loc;
4817 /* For a non-template class, use the name location. */
4819 else
4820 /* For a template class (an explicit instantiation), use the
4821 current location. */
4825 /* [dcl.attr.grammar]/4:
4827 No attribute-specifier-seq shall appertain to an explicit
4828 instantiation. */
4829 {
4832 declared_type))
4834 "no attribute can be applied to "
4836 }
4837 else
4839 }
4842 }
4844 /* Called when a declaration is seen that contains no names to declare.
4845 If its type is a reference to a structure, union or enum inherited
4846 from a containing scope, shadow that tag name for the current scope
4847 with a forward reference.
4848 If its type defines a new named structure or union
4849 or defines an enum, it is valid but we need not do anything here.
4850 Otherwise, it is an error.
4852 C++: may have to grok the declspecs to learn about static,
4853 complain for anonymous unions.
4855 Returns the TYPE declared -- or NULL_TREE if none. */
4857 tree
4859 {
4869 /* This is where the variables in an anonymous union are
4870 declared. An anonymous union declaration looks like:
4871 union { ... } ;
4872 because there is no declarator after the union, the parser
4873 sends that declaration here. */
4875 {
4879 {
4883 }
4884 }
4887 }
4888 \f
4889 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4891 tree
4895 {
4896 tree attrs;
4897 tree type;
4898 enum decl_context context
4904 {
4909 /* A template type parameter or other dependent type. */
4912 else
4914 }
4916 }
4918 /* Process a DECLARATOR for a function-scope variable declaration,
4919 namespace-scope variable declaration, or function declaration.
4920 (Function definitions go through start_function; class member
4921 declarations appearing in the body of the class go through
4922 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4923 If an error occurs, the error_mark_node is returned instead.
4925 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4926 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4927 for an explicitly defaulted function, or SD_DELETED for an explicitly
4928 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4929 implicitly initialized via a default constructor. ATTRIBUTES and
4930 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4932 The scope represented by the context of the returned DECL is pushed
4933 (if it is not the global namespace) and is assigned to
4934 *PUSHED_SCOPE_P. The caller is then responsible for calling
4935 pop_scope on *PUSHED_SCOPE_P if it is set. */
4937 tree
4941 tree attributes,
4942 tree prefix_attributes,
4944 {
4945 tree decl;
4946 tree context;
4953 /* An object declared as __attribute__((deprecated)) suppresses
4954 warnings of uses of other deprecated items. */
4973 /* Is it valid for this decl to have an initializer at all?
4974 If not, set INITIALIZED to zero, which will indirectly
4975 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4978 {
4981 }
4984 {
4988 decl);
4992 }
4998 /* If this is a typedef that names the class for linkage purposes
4999 (7.1.3p8), apply any attributes directly to the type. */
5004 else
5007 /* Set attributes here so if duplicate decl, will have proper attributes. */
5010 /* Dllimported symbols cannot be defined. Static data members (which
5011 can be initialized in-class and dllimported) go through grokfield,
5012 not here, so we don't need to exclude those decls when checking for
5013 a definition. */
5015 {
5018 }
5020 /* If #pragma weak was used, mark the decl weak now. */
5032 {
5036 {
5042 {
5046 else
5047 {
5053 }
5054 }
5055 else
5056 {
5061 {
5068 }
5069 /* Static data member are tricky; an in-class initialization
5070 still doesn't provide a definition, so the in-class
5071 declaration will have DECL_EXTERNAL set, but will have an
5072 initialization. Thus, duplicate_decls won't warn
5073 about this situation, and so we check here. */
5081 }
5082 }
5083 else
5084 {
5086 this_tmpl
5087 ? current_template_parms
5093 }
5095 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
5097 /* Do not mark DECL as an explicit specialization if it was not
5098 already marked as an instantiation; a declaration should
5099 never be marked as a specialization unless we know what
5100 template is being specialized. */
5102 {
5107 else
5110 /* [temp.expl.spec] An explicit specialization of a static data
5111 member of a template is a definition if the declaration
5112 includes an initializer; otherwise, it is a declaration.
5114 We check for processing_specialization so this only applies
5115 to the new specialization syntax. */
5118 }
5121 /* Aliases are definitions. */
5124 decl);
5125 }
5129 /* Enter this declaration into the symbol table. Don't push the plain
5130 VAR_DECL for a variable template. */
5143 {
5144 /* This is a const variable with implicit 'static'. Set
5145 DECL_THIS_STATIC so we can tell it from variables that are
5146 !TREE_PUBLIC because of the anonymous namespace. */
5149 }
5153 {
5157 decl);
5160 else
5164 }
5170 }
5172 /* Process the declaration of a variable DECL. INITIALIZED is true
5173 iff DECL is explicitly initialized. (INITIALIZED is false if the
5174 variable is initialized via an implicitly-called constructor.)
5175 This function must be called for ordinary variables (including, for
5176 example, implicit instantiations of templates), but must not be
5177 called for template declarations. */
5179 void
5181 {
5182 tree type;
5197 /* If an explicit initializer is present, or if this is a definition
5198 of an aggregate, then we need a complete type at this point.
5199 (Scalars are always complete types, so there is nothing to
5200 check.) This code just sets COMPLETE_P; errors (if necessary)
5201 are issued below. */
5203 && !complete_p
5205 {
5207 /* We will not yet have set TREE_READONLY on DECL if the type
5208 was "const", but incomplete, before this point. But, now, we
5209 have a complete type, so we can try again. */
5211 }
5214 /* Is it valid for this decl to have an initializer at all? */
5215 {
5216 /* Don't allow initializations for incomplete types except for
5217 arrays which might be completed by the initialization. */
5223 {
5226 }
5228 {
5231 /* else we already gave an error in start_decl. */
5232 }
5233 }
5235 {
5238 else
5240 decl);
5241 /* Change the type so that assemble_variable will give
5242 DECL an rtl we can live with: (mem (const_int 0)). */
5244 }
5246 /* Create a new scope to hold this declaration if necessary.
5247 Whether or not a new scope is necessary cannot be determined
5248 until after the type has been completed; if the type is a
5249 specialization of a class template it is not until after
5250 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
5251 will be set correctly. */
5253 }
5255 /* Handle initialization of references. DECL, TYPE, and INIT have the
5256 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
5257 but will be set to a new CLEANUP_STMT if a temporary is created
5258 that must be destroyed subsequently.
5260 Returns an initializer expression to use to initialize DECL, or
5261 NULL if the initialization can be performed statically.
5263 Quotes on semantics can be found in ARM 8.4.3. */
5265 static tree
5267 {
5269 {
5275 }
5279 tf_warning_or_error);
5284 /* Note: default conversion is only called in very special cases. */
5287 /* check_initializer handles this for non-reference variables, but for
5288 references we need to do it here or the initializer will get the
5289 incomplete array type and confuse later calls to
5290 cp_complete_array_type. */
5295 {
5299 }
5301 /* Convert INIT to the reference type TYPE. This may involve the
5302 creation of a temporary, whose lifetime must be the same as that
5303 of the reference. If so, a DECL_EXPR for the temporary will be
5304 added just after the DECL_EXPR for DECL. That's why we don't set
5305 DECL_INITIAL for local references (instead assigning to them
5306 explicitly); we need to allow the temporary to be initialized
5307 first. */
5309 tf_warning_or_error);
5310 }
5312 /* Designated initializers in arrays are not supported in GNU C++.
5313 The parser cannot detect this error since it does not know whether
5314 a given brace-enclosed initializer is for a class type or for an
5315 array. This function checks that CE does not use a designated
5316 initializer. If it does, an error is issued. Returns true if CE
5317 is valid, i.e., does not have a designated initializer. */
5319 static bool
5322 {
5323 /* Designated initializers for array elements are not supported. */
5325 {
5326 /* The parser only allows identifiers as designated
5327 initializers. */
5329 {
5333 }
5335 {
5339 }
5347 {
5348 /* A C99 designator is OK if it matches the current index. */
5351 else
5353 }
5354 else
5359 }
5362 }
5364 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5365 array until we finish parsing the initializer. If that's the
5366 situation we're in, update DECL accordingly. */
5368 static void
5370 {
5376 {
5377 /* do_default is really a C-ism to deal with tentative definitions.
5378 But let's leave it here to ease the eventual merge. */
5383 /* Check that there are no designated initializers in INIT, as
5384 those are not supported in GNU C++, and as the middle-end
5385 will crash if presented with a non-numeric designated
5386 initializer. */
5388 {
5391 HOST_WIDE_INT i;
5395 }
5398 {
5400 do_default);
5402 {
5406 }
5408 {
5410 {
5413 }
5414 /* If a `static' var's size isn't known, make it extern as
5415 well as static, so it does not get allocated. If it's not
5416 `static', then don't mark it extern; finish_incomplete_decl
5417 will give it a default size and it will get allocated. */
5420 }
5422 {
5425 }
5426 }
5431 }
5432 }
5434 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5435 any appropriate error messages regarding the layout. */
5437 static void
5439 {
5440 tree type;
5446 /* If we haven't already laid out this declaration, do so now.
5447 Note that we must not call complete type for an external object
5448 because it's type might involve templates that we are not
5449 supposed to instantiate yet. (And it's perfectly valid to say
5450 `extern X x' for some incomplete type `X'.) */
5459 {
5460 /* An automatic variable with an incomplete type: that is an error.
5461 Don't talk about array types here, since we took care of that
5462 message in grokdeclarator. */
5466 }
5467 #if 0
5468 /* Keep this code around in case we later want to control debug info
5469 based on whether a type is "used". (jason 1999-11-11) */
5472 /* Let debugger know it should output info for this type. */
5477 #endif
5482 {
5485 else
5486 {
5490 }
5491 }
5492 }
5494 /* If a local static variable is declared in an inline function, or if
5495 we have a weak definition, we must endeavor to create only one
5496 instance of the variable at link-time. */
5498 void
5500 {
5501 /* Static data in a function with comdat linkage also has comdat
5502 linkage. */
5504 /* Don't mess with __FUNCTION__. */
5509 {
5511 {
5512 /* With weak symbols, we simply make the variable COMDAT;
5513 that will cause copies in multiple translations units to
5514 be merged. */
5516 }
5517 else
5518 {
5521 {
5522 /* Without weak symbols, we can use COMMON to merge
5523 uninitialized variables. */
5526 }
5527 else
5528 {
5529 /* While for initialized variables, we must use internal
5530 linkage -- which means that multiple copies will not
5531 be merged. */
5537 "%q#D are wrong (you%'ll wind up with "
5539 else
5541 "static data %q#D are wrong (you%'ll wind "
5547 }
5548 }
5549 }
5550 }
5552 /* Issue an error message if DECL is an uninitialized const variable. */
5554 static void
5556 {
5559 /* ``Unless explicitly declared extern, a const object does not have
5560 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5561 7.1.6 */
5566 {
5574 else
5575 {
5578 decl);
5580 }
5583 {
5584 tree defaulted_ctor;
5591 "constructor is not user-provided because it is "
5594 "and the implicitly-defined constructor does not "
5596 }
5597 }
5598 }
5599 \f
5600 /* Structure holding the current initializer being processed by reshape_init.
5601 CUR is a pointer to the current element being processed, END is a pointer
5602 after the last element present in the initializer. */
5603 struct reshape_iter
5604 {
5607 };
5611 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5612 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5613 initialized. If there are no more such fields, the return value
5614 will be NULL. */
5616 tree
5618 {
5627 }
5629 /* Return true for [dcl.init.list] direct-list-initialization from
5630 single element of enumeration with a fixed underlying type. */
5632 bool
5634 {
5643 }
5645 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5646 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5647 INTEGER_CST representing the size of the array minus one (the maximum index),
5648 or NULL_TREE if the array was declared without specifying the size. D is
5649 the iterator within the constructor. */
5651 static tree
5653 tsubst_flags_t complain)
5654 {
5655 tree new_init;
5660 /* The initializer for an array is always a CONSTRUCTOR. */
5664 {
5665 /* Minus 1 is used for zero sized arrays. */
5671 /* sizetype is sign extended, not zero extended. */
5672 else
5674 }
5676 /* Loop until there are no more initializers. */
5680 {
5681 tree elt_init;
5686 complain);
5694 /* This can happen with an invalid initializer (c++/54501). */
5697 }
5700 }
5702 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5703 Parameters are the same of reshape_init_r. */
5705 static tree
5707 {
5716 }
5718 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5719 Parameters are the same of reshape_init_r. */
5721 static tree
5723 {
5729 {
5732 {
5737 }
5740 }
5742 /* For a vector, we initialize it as an array of the appropriate size. */
5747 }
5749 /* Subroutine of reshape_init_r, processes the initializers for classes
5750 or union. Parameters are the same of reshape_init_r. */
5752 static tree
5754 tsubst_flags_t complain)
5755 {
5756 tree field;
5757 tree new_init;
5761 /* The initializer for a class is always a CONSTRUCTOR. */
5766 {
5767 /* [dcl.init.aggr]
5769 An initializer for an aggregate member that is an
5770 empty class shall have the form of an empty
5771 initializer-list {}. */
5773 {
5777 }
5779 }
5781 /* Loop through the initializable fields, gathering initializers. */
5783 {
5784 tree field_init;
5787 /* Handle designated initializers, as an extension. */
5789 {
5794 /* We already reshaped this. */
5798 else
5799 {
5804 }
5807 {
5812 }
5813 }
5815 /* If we processed all the member of the class, we are done. */
5825 {
5826 /* This can happen with an invalid initializer for a flexible
5827 array member (c++/54441). */
5831 }
5835 /* [dcl.init.aggr]
5837 When a union is initialized with a brace-enclosed
5838 initializer, the braces shall only contain an
5839 initializer for the first member of the union. */
5844 }
5847 }
5849 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5850 designators are not valid; either complain or return true to indicate
5851 that reshape_init_r should return error_mark_node. */
5853 static bool
5855 {
5857 {
5861 else
5863 }
5865 }
5867 /* Subroutine of reshape_init, which processes a single initializer (part of
5868 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5869 iterator within the CONSTRUCTOR which points to the initializer to process.
5870 FIRST_INITIALIZER_P is true if this is the first initializer of the
5871 outermost CONSTRUCTOR node. */
5873 static tree
5875 tsubst_flags_t complain)
5876 {
5887 {
5888 /* A complex type can be initialized from one or two initializers,
5889 but braces are not elided. */
5892 {
5894 {
5897 else
5899 }
5900 }
5902 {
5910 }
5912 }
5914 /* A non-aggregate type is always initialized with a single
5915 initializer. */
5917 {
5918 /* It is invalid to initialize a non-aggregate type with a
5919 brace-enclosed initializer before C++0x.
5920 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5921 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5922 a CONSTRUCTOR (with a record type). */
5924 /* Don't complain about a capture-init. */
5927 {
5929 {
5931 /* Isn't value-initialization. */
5933 {
5936 type);
5938 }
5939 }
5940 else
5942 }
5946 }
5948 /* "If T is a class type and the initializer list has a single element of
5949 type cv U, where U is T or a class derived from T, the object is
5950 initialized from that element." Even if T is an aggregate. */
5952 && first_initializer_p
5955 {
5958 }
5960 /* [dcl.init.aggr]
5962 All implicit type conversions (clause _conv_) are considered when
5963 initializing the aggregate member with an initializer from an
5964 initializer-list. If the initializer can initialize a member,
5965 the member is initialized. Otherwise, if the member is itself a
5966 non-empty subaggregate, brace elision is assumed and the
5967 initializer is considered for the initialization of the first
5968 member of the subaggregate. */
5970 /* But don't try this for the first initializer, since that would be
5971 looking through the outermost braces; A a2 = { a1 }; is not a
5972 valid aggregate initialization. */
5973 && !first_initializer_p
5976 complain)))
5977 {
5980 }
5982 /* [dcl.init.string]
5984 A char array (whether plain char, signed char, or unsigned char)
5985 can be initialized by a string-literal (optionally enclosed in
5986 braces); a wchar_t array can be initialized by a wide
5987 string-literal (optionally enclosed in braces). */
5990 {
5993 /* Strip one level of braces if and only if they enclose a single
5994 element (as allowed by [dcl.init.string]). */
5998 {
6000 }
6002 /* If it's a string literal, then it's the initializer for the array
6003 as a whole. Otherwise, continue with normal initialization for
6004 array types (one value per array element). */
6006 {
6011 }
6012 }
6014 /* The following cases are about aggregates. If we are not within a full
6015 initializer already, and there is not a CONSTRUCTOR, it means that there
6016 is a missing set of braces (that is, we are processing the case for
6017 which reshape_init exists). */
6019 {
6021 {
6023 /* There is no need to reshape pointer-to-member function
6024 initializers, as they are always constructed correctly
6025 by the front end. */
6026 ;
6028 /* For a nested compound literal, there is no need to reshape since
6029 brace elision is not allowed. Even if we decided to allow it,
6030 we should add a call to reshape_init in finish_compound_literal,
6031 before calling digest_init, so changing this code would still
6032 not be necessary. */
6034 else
6035 {
6039 }
6040 }
6045 type);
6046 }
6048 /* Dispatch to specialized routines. */
6055 else
6057 }
6059 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
6060 brace-enclosed aggregate initializer.
6062 INIT is the CONSTRUCTOR containing the list of initializers describing
6063 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
6064 It may not presently match the shape of the TYPE; for example:
6066 struct S { int a; int b; };
6067 struct S a[] = { 1, 2, 3, 4 };
6069 Here INIT will hold a vector of four elements, rather than a
6070 vector of two elements, each itself a vector of two elements. This
6071 routine transforms INIT from the former form into the latter. The
6072 revised CONSTRUCTOR node is returned. */
6074 tree
6076 {
6078 reshape_iter d;
6079 tree new_init;
6085 /* An empty constructor does not need reshaping, and it is always a valid
6086 initializer. */
6090 /* Handle [dcl.init.list] direct-list-initialization from
6091 single element of enumeration with a fixed underlying type. */
6093 {
6097 else
6099 }
6101 /* Recurse on this CONSTRUCTOR. */
6109 /* Make sure all the element of the constructor were used. Otherwise,
6110 issue an error about exceeding initializers. */
6112 {
6115 else
6117 }
6124 }
6126 /* Verify array initializer. Returns true if errors have been reported. */
6128 bool
6130 {
6133 /* The array type itself need not be complete, because the
6134 initializer may tell us how many elements are in the array.
6135 But, the elements of the array must be complete. */
6137 {
6141 else
6144 }
6145 /* A compound literal can't have variable size. */
6149 {
6152 }
6154 }
6156 /* Subroutine of check_initializer; args are passed down from that function.
6157 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
6159 static tree
6162 {
6165 }
6167 /* Verify INIT (the initializer for DECL), and record the
6168 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
6169 grok_reference_init.
6171 If the return value is non-NULL, it is an expression that must be
6172 evaluated dynamically to initialize DECL. */
6174 static tree
6176 {
6179 tree core_type;
6181 /* Things that are going to be initialized need to have complete
6182 type. */
6186 {
6187 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
6188 it doesn't have storage to be initialized. */
6191 }
6194 /* We will have already complained. */
6198 {
6201 }
6203 {
6208 }
6209 else
6210 /* There is no way to make a variable-sized class type in GNU C++. */
6214 {
6217 {
6219 {
6222 }
6224 {
6226 "scalar object %qD requires one element in "
6230 }
6231 }
6232 }
6235 {
6242 }
6244 ;
6247 {
6249 {
6252 }
6255 /* Do not reshape constructors of vectors (they don't need to be
6256 reshaped. */
6258 {
6260 {
6262 tf_warning_or_error);
6264 }
6266 {
6267 /* Don't reshape if the class has constructors. */
6270 "in C++98 %qD must be initialized by "
6272 decl);
6273 }
6275 {
6278 }
6279 else
6280 {
6283 }
6284 }
6288 {
6291 /* We get here with code like `int a (2);' */
6293 tf_warning_or_error);
6294 }
6296 /* If DECL has an array type without a specific bound, deduce the
6297 array size from the initializer. */
6311 {
6314 /* A constructor call is a non-trivial initializer even if
6315 it isn't explicitly written. */
6319 /* If this is a constexpr initializer, expand_default_init will
6320 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6321 case, pull the initializer back out and pass it down into
6322 store_init_value. */
6327 {
6330 /* Don't call digest_init; it's unnecessary and will complain
6331 about aggregate initialization of non-aggregate classes. */
6333 }
6335 {
6336 /* Declared constexpr, but no suitable initializer; massage
6337 init appropriately so we can pass it into store_init_value
6338 for the error. */
6341 {
6345 }
6347 }
6348 else
6350 }
6353 {
6354 /* In aggregate initialization of a variable, each element
6355 initialization is a full-expression because there is no
6356 enclosing expression. */
6371 }
6372 }
6373 else
6374 {
6382 }
6388 {
6389 /* We might have set these in cp_finish_decl. */
6392 }
6396 {
6404 else
6408 {
6412 }
6414 }
6417 }
6419 /* If DECL is not a local variable, give it RTL. */
6421 static void
6423 {
6427 /* Set the DECL_ASSEMBLER_NAME for the object. */
6429 {
6430 /* The `register' keyword, when used together with an
6431 asm-specification, indicates that the variable should be
6432 placed in a particular register. */
6434 {
6437 }
6438 else
6439 {
6444 }
6445 }
6447 /* Handle non-variables up front. */
6449 {
6452 }
6454 /* If we see a class member here, it should be a static data
6455 member. */
6457 {
6459 /* An in-class declaration of a static data member should be
6460 external; it is only a declaration, and not a definition. */
6465 }
6467 /* We don't create any RTL for local variables. */
6471 /* We defer emission of local statics until the corresponding
6472 DECL_EXPR is expanded. But with constexpr its function might never
6473 be expanded, so go ahead and tell cgraph about the variable now. */
6478 /* Defer template instantiations. */
6483 /* If we're not deferring, go ahead and assemble the variable. */
6486 }
6488 /* walk_tree helper for wrap_temporary_cleanups, below. */
6490 static tree
6492 {
6493 /* Stop at types or full-expression boundaries. */
6496 {
6499 }
6502 {
6507 /* Tell honor_protect_cleanup_actions to handle this as a separate
6508 cleanup. */
6512 }
6515 }
6517 /* We're initializing a local variable which has a cleanup GUARD. If there
6518 are any temporaries used in the initializer INIT of this variable, we
6519 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6520 variable will be cleaned up properly if one of them throws.
6522 Unfortunately, there's no way to express this properly in terms of
6523 nesting, as the regions for the temporaries overlap the region for the
6524 variable itself; if there are two temporaries, the variable needs to be
6525 the first thing destroyed if either of them throws. However, we only
6526 want to run the variable's cleanup if it actually got constructed. So
6527 we need to guard the temporary cleanups with the variable's cleanup if
6528 they are run on the normal path, but not if they are run on the
6529 exceptional path. We implement this by telling
6530 honor_protect_cleanup_actions to strip the variable cleanup from the
6531 exceptional path. */
6533 static void
6535 {
6537 }
6539 /* Generate code to initialize DECL (a local variable). */
6541 static void
6543 {
6545 tree cleanup;
6553 {
6554 /* If we used it already as memory, it must stay in memory. */
6558 }
6563 /* Compute and store the initial value. */
6568 /* Generate a cleanup, if necessary. */
6571 /* Perform the initialization. */
6573 {
6577 {
6578 /* Stick simple initializers in DECL_INITIAL so that
6579 -Wno-init-self works (c++/34772). */
6584 {
6588 OPT_Winit_self,
6590 }
6591 }
6592 else
6593 {
6596 /* If we're only initializing a single object, guard the
6597 destructors of any temporaries used in its initializer with
6598 its destructor. This isn't right for arrays because each
6599 element initialization is a full-expression. */
6608 saved_stmts_are_full_exprs_p;
6609 }
6610 }
6612 /* Set this to 0 so we can tell whether an aggregate which was
6613 initialized was ever used. Don't do this if it has a
6614 destructor, so we don't complain about the 'resource
6615 allocation is initialization' idiom. Now set
6616 attribute((unused)) on types so decls of that type will be
6617 marked used. (see TREE_USED, above.) */
6619 && ! already_used
6628 }
6630 /* DECL is a VAR_DECL for a compiler-generated variable with static
6631 storage duration (like a virtual table) whose initializer is a
6632 compile-time constant. Initialize the variable and provide it to the
6633 back end. */
6635 void
6637 {
6638 tree init;
6648 }
6650 /* INIT is the initializer for a variable, as represented by the
6651 parser. Returns true iff INIT is type-dependent. */
6653 static bool
6655 {
6657 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6660 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6661 {
6671 }
6672 else
6673 /* It must be a simple expression, e.g., int i = 3; */
6677 }
6679 /* INIT is the initializer for a variable, as represented by the
6680 parser. Returns true iff INIT is value-dependent. */
6682 static bool
6684 {
6686 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6689 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6690 {
6700 }
6701 else
6702 /* It must be a simple expression, e.g., int i = 3; */
6706 }
6708 // Returns true if a DECL is VAR_DECL with the concept specifier.
6711 {
6713 // Not all variables have DECL_LANG_SPECIFIC.
6716 }
6718 /* A helper function to be called via walk_tree. If any label exists
6719 under *TP, it is (going to be) forced. Set has_forced_label_in_static. */
6721 static tree
6723 {
6729 }
6731 /* Finish processing of a declaration;
6732 install its line number and initial value.
6733 If the length of an array type is not known before,
6734 it must be determined now, from the initial value, or it is an error.
6736 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6737 true, then INIT is an integral constant expression.
6739 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6740 if the (init) syntax was used. */
6742 void
6745 {
6746 tree type;
6751 tree auto_node;
6756 {
6760 }
6763 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6770 /* Warn about register storage specifiers except when in GNU global
6771 or local register variable extension. */
6773 {
6776 "ISO C++1z does not allow %<register%> storage "
6778 else
6781 }
6783 /* If a name was specified, get the string. */
6798 {
6799 tree d_init;
6801 {
6805 {
6806 /* init is null because we're deferring instantiating the
6807 initializer until we need it. Well, we need it now. */
6810 }
6813 }
6818 tf_warning_or_error);
6828 {
6833 }
6835 }
6846 {
6847 tree clone;
6849 {
6850 /* FIXME check this is 1st decl. */
6855 {
6859 }
6861 }
6863 {
6866 else
6868 }
6869 }
6872 {
6874 /* If DECL is a reference, then we want to know whether init is a
6875 reference constant; init_const_expr_p as passed tells us whether
6876 it's an rvalue constant. */
6880 {
6881 /* Set these flags now for templates. We'll update the flags in
6882 store_init_value for instantiations. */
6885 /* FIXME setting TREE_CONSTANT on refs breaks the back end. */
6888 }
6889 }
6892 {
6895 /* Add this declaration to the statement-tree. */
6902 {
6905 }
6907 /* Generally, initializers in templates are expanded when the
6908 template is instantiated. But, if DECL is a variable constant
6909 then it can be used in future constant expressions, so its value
6910 must be available. */
6915 && init_const_expr_p
6920 {
6921 /* This variable seems to be a non-dependent constant, so process
6922 its initializer. If check_initializer returns non-null the
6923 initialization wasn't constant after all. */
6924 tree init_code;
6930 }
6934 {
6935 /* Deduce array size even if the initializer is dependent. */
6937 /* And complain about multiple initializers. */
6941 tf_warning_or_error);
6942 }
6947 }
6949 /* Just store non-static data member initializers for later. */
6953 /* Take care of TYPE_DECLs up front. */
6955 {
6958 {
6962 }
6964 /* If we have installed this as the canonical typedef for this
6965 type, and that type has not been defined yet, delay emitting
6966 the debug information for it, as we will emit it later. */
6972 at_eof);
6974 }
6976 /* A reference will be modified here, as it is initialized. */
6980 {
6983 }
6986 {
6987 /* If this is a local variable that will need a mangled name,
6988 register it now. We must do this before processing the
6989 initializer for the variable, since the initialization might
6990 require a guard variable, and since the mangled name of the
6991 guard variable will depend on the mangled name of this
6992 variable. */
6996 {
6998 /* Normally has_forced_label_in_static is set during GIMPLE
6999 lowering, but [cd]tors are never actually compiled directly.
7000 We need to set this early so we can deal with the label
7001 address extension. */
7005 {
7008 }
7009 /* And make sure it's in the symbol table for
7010 c_parse_final_cleanups to find. */
7012 }
7014 /* Convert the initializer to the type of DECL, if we have not
7015 already initialized DECL. */
7017 /* If !DECL_EXTERNAL then DECL is being defined. In the
7018 case of a static data member initialized inside the
7019 class-specifier, there can be an initializer even if DECL
7020 is *not* defined. */
7022 {
7026 /* Handle:
7028 [dcl.init]
7030 The memory occupied by any object of static storage
7031 duration is zero-initialized at program startup before
7032 any other initialization takes place.
7034 We cannot create an appropriate initializer until after
7035 the type of DECL is finalized. If DECL_INITIAL is set,
7036 then the DECL is statically initialized, and any
7037 necessary zero-initialization has already been performed. */
7042 /* Remember that the initialization for this variable has
7043 taken place. */
7045 /* This declaration is the definition of this variable,
7046 unless we are initializing a static data member within
7047 the class specifier. */
7050 }
7051 /* If the variable has an array type, lay out the type, even if
7052 there is no initializer. It is valid to index through the
7053 array, and we must get TYPE_ALIGN set correctly on the array
7054 type. */
7061 /* So decl is a global variable or a static member of a
7062 non local class. Record the types it uses
7063 so that we can decide later to emit debug info for them. */
7065 }
7067 /* Add this declaration to the statement-tree. This needs to happen
7068 after the call to check_initializer so that the DECL_EXPR for a
7069 reference temp is added before the DECL_EXPR for the reference itself. */
7071 {
7072 /* If we're building a variable sized type, and we might be
7073 reachable other than via the top of the current binding
7074 level, then create a new BIND_EXPR so that we deallocate
7075 the object at the right time. */
7080 {
7081 tree bind;
7086 }
7088 }
7090 /* Let the middle end know about variables and functions -- but not
7091 static data members in uninstantiated class templates. */
7093 {
7095 {
7098 }
7100 /* This needs to happen after the linkage is set. */
7104 {
7105 /* If a TREE_READONLY variable needs initialization
7106 at runtime, it is no longer readonly and we need to
7107 avoid MEM_READONLY_P being set on RTL created for it. */
7109 {
7113 }
7117 /* Likewise if it needs destruction. */
7120 }
7124 /* Check for abstractness of the type. Notice that there is no
7125 need to strip array types here since the check for those types
7126 is already done within create_array_type_for_decl. */
7130 /* No initialization required. */
7131 ;
7133 {
7135 {
7137 {
7138 /* An out-of-class default definition is defined at
7139 the point where it is explicitly defaulted. */
7144 }
7145 else
7147 }
7148 /* else no initialization required. */
7149 }
7153 {
7156 }
7157 /* A variable definition. */
7159 /* Initialize the local variable. */
7162 /* If a variable is defined, and then a subsequent
7163 definition with external linkage is encountered, we will
7164 get here twice for the same variable. We want to avoid
7165 calling expand_static_init more than once. For variables
7166 that are not static data members, we can call
7167 expand_static_init only when we actually process the
7168 initializer. It is not legal to redeclare a static data
7169 member, so this issue does not arise in that case. */
7172 }
7174 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
7175 reference, insert it in the statement-tree now. */
7177 {
7182 }
7188 }
7190 /* For class TYPE return itself or some its bases that contain
7191 any direct non-static data members. Return error_mark_node if an
7192 error has been diagnosed. */
7194 static tree
7196 {
7204 {
7208 else
7213 }
7215 {
7222 }
7223 else
7233 {
7238 {
7240 {
7245 }
7249 /* OK, found the same base along another path. We'll complain
7252 {
7254 "classes %qT and %qT have non-static data "
7257 }
7258 else
7260 }
7261 }
7263 }
7265 /* Return std::tuple_size<TYPE>::value. */
7267 static tree
7269 {
7285 else
7287 }
7289 /* Return std::tuple_element<I,TYPE>::type. */
7291 static tree
7293 {
7301 tf_warning_or_error);
7304 }
7306 /* Return e.get<i>() or get<i>(e). */
7308 static tree
7310 {
7318 /* [The id-expression] e is an lvalue if the type of the entity e is an
7319 lvalue reference and an xvalue otherwise. */
7327 {
7332 }
7333 else
7334 {
7340 }
7341 }
7343 /* It's impossible to recover the decltype of a tuple decomposition variable
7344 based on the actual type of the variable, so store it in a hash table. */
7346 static void
7348 {
7352 }
7354 tree
7356 {
7358 }
7360 /* Finish a decomposition declaration. DECL is the underlying declaration
7361 "e", FIRST is the head of a chain of decls for the individual identifiers
7362 chained through DECL_CHAIN in reverse order and COUNT is the number of
7363 those decls. */
7365 void
7367 {
7369 {
7370 error_out:
7372 {
7375 {
7378 }
7380 }
7384 }
7388 /* This happens for range for when not in templates.
7389 Still add the DECL_VALUE_EXPRs for later processing. */
7390 || (!processing_template_decl
7392 {
7394 {
7396 {
7402 }
7404 {
7407 }
7409 }
7411 }
7417 {
7421 }
7427 {
7428 /* If e is a constant reference, use the referent directly. */
7433 }
7438 {
7439 tree nelts;
7444 {
7447 }
7450 {
7451 cnt_mismatch:
7455 else
7459 }
7462 {
7468 NULL_TREE);
7471 }
7472 }
7473 /* 2 GNU extensions. */
7475 {
7481 {
7487 t);
7490 }
7491 }
7493 {
7499 {
7507 NULL_TREE);
7510 }
7511 }
7513 {
7515 {
7519 }
7524 {
7535 {
7539 }
7540 /* Save the decltype away before reference collapse. */
7546 {
7547 /* In this case the names are variables, not just proxies. */
7550 }
7553 }
7554 }
7556 {
7559 }
7561 {
7564 }
7566 {
7569 }
7570 else
7571 {
7576 {
7580 }
7584 else
7585 eltscnt++;
7590 {
7594 }
7599 else
7600 {
7608 i++;
7609 }
7610 }
7613 }
7615 /* Returns a declaration for a VAR_DECL as if:
7617 extern "C" TYPE NAME;
7619 had been seen. Used to create compiler-generated global
7620 variables. */
7622 static tree
7624 {
7625 tree decl;
7632 /* If the user has explicitly declared this variable (perhaps
7633 because the code we are compiling is part of a low-level runtime
7634 library), then it is possible that our declaration will be merged
7635 with theirs by pushdecl. */
7641 }
7643 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
7644 if "__cxa_atexit" is not being used) corresponding to the function
7645 to be called when the program exits. */
7647 static tree
7649 {
7650 tree fn_type;
7653 {
7654 tree arg_type;
7657 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
7659 else
7660 /* The parameter to "atexit" is "void (*)(void)". */
7666 }
7669 }
7671 /* Returns a pointer to the `atexit' function. Note that if
7672 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
7673 `__cxa_atexit' function specified in the IA64 C++ ABI. */
7675 static tree
7677 {
7678 tree atexit_fndecl;
7679 tree fn_type;
7680 tree fn_ptr_type;
7688 {
7689 /* The declaration for `__cxa_atexit' is:
7691 int __cxa_atexit (void (*)(void *), void *, void *)
7693 We build up the argument types and then the function type
7694 itself. */
7698 /* First, build the pointer-to-function type for the first
7699 argument. */
7701 /* Then, build the rest of the argument types. */
7704 {
7707 }
7708 else
7709 {
7712 }
7713 /* And the final __cxa_atexit type. */
7716 NULL_TREE);
7719 else
7721 }
7722 else
7723 {
7724 /* The declaration for `atexit' is:
7726 int atexit (void (*)());
7728 We build up the argument types and then the function type
7729 itself. */
7731 /* Build the final atexit type. */
7735 }
7737 /* Now, build the function declaration. */
7745 }
7747 /* Like get_atexit_node, but for thread-local cleanups. */
7749 static tree
7751 {
7752 /* The declaration for `__cxa_thread_atexit' is:
7754 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7758 NULL_TREE);
7760 /* Now, build the function declaration. */
7764 }
7766 /* Returns the __dso_handle VAR_DECL. */
7768 static tree
7770 {
7774 /* Declare the variable. */
7776 ptr_type_node);
7778 #ifdef HAVE_GAS_HIDDEN
7780 {
7783 }
7784 #endif
7787 }
7789 /* Begin a new function with internal linkage whose job will be simply
7790 to destroy some particular variable. */
7794 static tree
7796 {
7798 tree fntype;
7799 tree fndecl;
7805 /* No need to mangle this. */
7808 /* Build the name of the function. */
7810 /* Build the function declaration. */
7813 /* It's a function with internal linkage, generated by the
7814 compiler. */
7817 /* Make the function `inline' so that it is only emitted if it is
7818 actually needed. It is unlikely that it will be inlined, since
7819 it is only called via a function pointer, but we avoid unnecessary
7820 emissions this way. */
7823 /* Build the parameter. */
7825 {
7826 tree parmdecl;
7833 }
7841 }
7843 /* Finish the cleanup function begun by start_cleanup_fn. */
7845 static void
7847 {
7851 }
7853 /* Generate code to handle the destruction of DECL, an object with
7854 static storage duration. */
7856 tree
7858 {
7859 tree cleanup;
7860 tree addr;
7861 tree compound_stmt;
7862 tree fcall;
7863 tree type;
7866 tree atex_node;
7872 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7873 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7874 destructor to "__cxa_atexit"; we don't have to build a temporary
7875 function to do the cleanup. */
7876 dso_parm = (flag_use_cxa_atexit
7881 {
7884 /* Find the destructor. */
7888 /* Make sure it is accessible. */
7890 tf_warning_or_error);
7891 }
7892 else
7893 {
7894 /* Call build_cleanup before we enter the anonymous function so
7895 that any access checks will be done relative to the current
7896 scope, rather than the scope of the anonymous function. */
7899 /* Now start the function. */
7902 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7903 to the original function, rather than the anonymous one. That
7904 will make the back end think that nested functions are in use,
7905 which causes confusion. */
7910 /* Create the body of the anonymous function. */
7915 }
7917 /* Call atexit with the cleanup function. */
7923 else
7927 {
7928 /* We must convert CLEANUP to the type that "__cxa_atexit"
7929 expects. */
7931 /* "__cxa_atexit" will pass the address of DECL to the
7932 cleanup function. */
7935 /* The declared type of the parameter to "__cxa_atexit" is
7936 "void *". For plain "T*", we could just let the
7937 machinery in cp_build_function_call convert it -- but if the
7938 type is "cv-qualified T *", then we need to convert it
7939 before passing it in, to avoid spurious errors. */
7941 }
7942 else
7943 /* Since the cleanup functions we build ignore the address
7944 they're given, there's no reason to pass the actual address
7945 in, and, in general, it's cheaper to pass NULL than any
7946 other value. */
7951 tf_warning_or_error);
7953 /* Just pass NULL to the dso handle parm if we don't actually
7954 have a DSO handle on this target. */
7956 else
7960 {
7963 {
7966 }
7967 else
7968 {
7971 }
7972 }
7973 else
7974 {
7977 }
7980 }
7982 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7983 is its initializer. Generate code to handle the construction
7984 and destruction of DECL. */
7986 static void
7988 {
7992 /* Some variables require no dynamic initialization. */
7994 {
7995 /* Make sure the destructor is callable. */
7999 }
8003 {
8007 else
8012 {
8014 "C++11 %<thread_local%> allows dynamic initialization "
8017 }
8019 }
8022 {
8023 /* Emit code to perform this initialization but once. */
8028 /* We don't need thread-safety code for thread-local vars. */
8032 /* Emit code to perform this initialization but once. This code
8033 looks like:
8035 static <type> guard;
8036 if (!__atomic_load (guard.first_byte)) {
8037 if (__cxa_guard_acquire (&guard)) {
8038 bool flag = false;
8039 try {
8040 // Do initialization.
8041 flag = true; __cxa_guard_release (&guard);
8042 // Register variable for destruction at end of program.
8043 } catch {
8044 if (!flag) __cxa_guard_abort (&guard);
8045 }
8046 }
8048 Note that the `flag' variable is only set to 1 *after* the
8049 initialization is complete. This ensures that an exception,
8050 thrown during the construction, will cause the variable to
8051 reinitialized when we pass through this code again, as per:
8053 [stmt.dcl]
8055 If the initialization exits by throwing an exception, the
8056 initialization is not complete, so it will be tried again
8057 the next time control enters the declaration.
8059 This process should be thread-safe, too; multiple threads
8060 should not be able to initialize the variable more than
8061 once. */
8063 /* Create the guard variable. */
8066 /* Begin the conditional initialization. */
8073 {
8086 acquire_fn = push_library_fn
8089 NULL_TREE),
8094 NULL_TREE);
8104 inner_if_stmt);
8112 void_node,
8116 /* Do the initialization itself. */
8118 init = add_stmt_to_compound
8120 init = add_stmt_to_compound
8122 }
8123 else
8126 /* Use atexit to register a function for destroying this static
8127 variable. */
8133 {
8137 }
8142 }
8145 else
8147 }
8149 \f
8150 /* Make TYPE a complete type based on INITIAL_VALUE.
8151 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8152 2 if there was no information (in which case assume 0 if DO_DEFAULT),
8153 3 if the initializer list is empty (in pedantic mode). */
8155 int
8157 {
8161 /* Don't get confused by a CONSTRUCTOR for some other type. */
8168 {
8170 tree value;
8172 /* An array of character type can be initialized from a
8173 brace-enclosed string constant.
8175 FIXME: this code is duplicated from reshape_init. Probably
8176 we should just call reshape_init here? */
8180 {
8187 }
8189 /* If any of the elements are parameter packs, we can't actually
8190 complete this type now because the array size is dependent. */
8192 {
8195 {
8198 }
8199 }
8200 }
8204 /* We can create the array before the element type is complete, which
8205 means that we didn't have these two bits set in the original type
8206 either. In completing the type, we are expected to propagate these
8207 bits. See also complete_type which does the same thing for arrays
8208 of fixed size. */
8211 {
8216 }
8219 }
8221 /* As above, but either give an error or reject zero-size arrays, depending
8222 on COMPLAIN. */
8224 int
8227 {
8230 /* In SFINAE context we can't be lenient about zero-size arrays. */
8237 {
8243 {
8246 }
8250 }
8252 }
8253 \f
8254 /* Return zero if something is declared to be a member of type
8255 CTYPE when in the context of CUR_TYPE. STRING is the error
8256 message to print in that case. Otherwise, quietly return 1. */
8258 static int
8260 {
8262 {
8265 else
8268 }
8270 }
8271 \f
8272 /* Subroutine of `grokdeclarator'. */
8274 /* Generate errors possibly applicable for a given set of specifiers.
8275 This is for ARM $7.1.2. */
8277 static void
8285 {
8287 {
8324 }
8328 && !flag_noexcept_type
8334 }
8336 /* DECL is a member function or static data member and is presently
8337 being defined. Check that the definition is taking place in a
8338 valid namespace. */
8340 static void
8342 {
8343 /* These checks only apply to member functions and static data
8344 members. */
8346 /* We check for problems with specializations in pt.c in
8347 check_specialization_namespace, where we can issue better
8348 diagnostics. */
8351 /* We check this in check_explicit_instantiation_namespace. */
8354 /* [class.mfct]
8356 A member function definition that appears outside of the
8357 class definition shall appear in a namespace scope enclosing
8358 the class definition.
8360 [class.static.data]
8362 The definition for a static data member shall appear in a
8363 namespace scope enclosing the member's class definition. */
8367 }
8369 /* Build a PARM_DECL for the "this" parameter. TYPE is the
8370 METHOD_TYPE for a non-static member function; QUALS are the
8371 cv-qualifiers that apply to the function. */
8373 tree
8375 {
8376 tree this_type;
8377 tree qual_type;
8378 tree parm;
8379 cp_cv_quals this_quals;
8382 {
8383 this_type
8386 }
8387 else
8389 /* The `this' parameter is implicitly `const'; it cannot be
8390 assigned to. */
8396 }
8398 /* DECL is a static member function. Complain if it was declared
8399 with function-cv-quals. */
8401 static void
8403 {
8406 decl);
8407 }
8409 // Check that FN takes no arguments and returns bool.
8410 static void
8412 {
8413 // A constraint is nullary.
8417 // The declared return type of the concept shall be bool, and
8418 // it shall not be deduced from it definition.
8424 }
8426 /* Helper function. Replace the temporary this parameter injected
8427 during cp_finish_omp_declare_simd with the real this parameter. */
8429 static tree
8431 {
8440 }
8442 /* CTYPE is class type, or null if non-class.
8443 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8444 or METHOD_TYPE.
8445 DECLARATOR is the function's name.
8446 PARMS is a chain of PARM_DECLs for the function.
8447 VIRTUALP is truthvalue of whether the function is virtual or not.
8448 FLAGS are to be passed through to `grokclassfn'.
8449 QUALS are qualifiers indicating whether the function is `const'
8450 or `volatile'.
8451 RAISES is a list of exceptions that this function can raise.
8452 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8453 not look, and -1 if we should not call `grokclassfn' at all.
8455 SFK is the kind of special function (if any) for the new function.
8457 Returns `NULL_TREE' if something goes wrong, after issuing
8458 applicable error messages. */
8460 static tree
8462 tree type,
8463 tree declarator,
8464 tree parms,
8465 tree orig_declarator,
8466 tree decl_reqs,
8469 cp_cv_quals quals,
8470 cp_ref_qualifier rqual,
8471 tree raises,
8477 special_function_kind sfk,
8480 tree in_namespace,
8482 location_t location)
8483 {
8484 tree decl;
8486 tree t;
8488 // Was the concept specifier present?
8491 // Concept declarations must have a corresponding definition.
8493 {
8496 }
8505 /* Set the constraints on the declaration. */
8507 {
8512 /* Adjust the required expression into a constraint. */
8518 }
8520 /* If we have an explicit location, use it, otherwise use whatever
8521 build_lang_decl used (probably input_location). */
8526 {
8527 tree parm;
8532 /* Allocate space to hold the vptr bit if needed. */
8534 }
8538 /* Propagate volatile out from type to decl. */
8542 /* Setup decl according to sfk. */
8544 {
8555 }
8559 {
8561 error
8563 orig_declarator);
8564 else
8565 {
8570 {
8571 /* Something like `template <class T> friend void f<T>()'. */
8574 orig_declarator);
8576 }
8579 /* A friend declaration of the form friend void f<>(). Record
8580 the information in the TEMPLATE_ID_EXPR. */
8589 {
8592 decl);
8594 }
8597 {
8600 decl);
8602 }
8603 }
8604 }
8606 /* If this decl has namespace scope, set that up. */
8612 /* `main' and builtins have implicit 'C' linkage. */
8625 /* Should probably propagate const out from type to decl I bet (mrs). */
8627 {
8630 }
8636 {
8640 }
8643 {
8654 }
8656 /* Members of anonymous types and local classes have no linkage; make
8657 them internal. If a typedef is made later, this will be changed. */
8663 {
8664 /* [basic.link]: A name with no linkage (notably, the name of a class
8665 or enumeration declared in a local scope) shall not be used to
8666 declare an entity with linkage.
8668 DR 757 relaxes this restriction for C++0x. */
8670 }
8674 {
8677 }
8679 /* If the declaration was declared inline, mark it as such. */
8681 {
8685 }
8689 // If the concept declaration specifier was found, check
8690 // that the declaration satisfies the necessary requirements.
8692 {
8695 }
8699 {
8702 TYPE_UNQUALIFIED,
8703 REF_QUAL_NONE);
8706 {
8710 decl);
8712 }
8715 {
8719 decl);
8721 }
8722 }
8725 {
8727 {
8731 }
8734 {
8739 }
8743 }
8748 {
8752 /* [over.literal]/6: Literal operators shall not have C linkage. */
8754 {
8757 }
8760 {
8763 {
8766 }
8770 {
8774 }
8776 {
8780 }
8781 }
8782 else
8783 {
8786 }
8787 }
8790 /* Make the init_value nonzero so pushdecl knows this is not
8791 tentative. error_mark_node is replaced later with the BLOCK. */
8798 {
8799 /* Adjust "omp declare simd" attributes. */
8802 {
8803 tree attr;
8806 {
8811 {
8813 cl = c_omp_declare_simd_clauses_to_numbers
8817 else
8819 }
8820 }
8821 }
8822 }
8824 /* Caller will do the rest of this. */
8831 /* 12.4/3 */
8839 template_count,
8850 {
8853 }
8855 /* Check main's type after attributes have been applied. */
8857 {
8859 integer_type_node))
8860 {
8862 tree newtype;
8866 }
8869 }
8872 {
8874 (processing_template_decl
8876 ? current_template_parms
8883 {
8884 tree ok;
8885 tree pushed_scope;
8888 /* Because grokfndecl is always supposed to return a
8889 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8890 here. We depend on our callers to figure out that its
8891 really a template that's being returned. */
8896 {
8897 /* Remove the `this' parm added by grokclassfn. */
8900 }
8902 {
8905 }
8907 {
8912 }
8914 /* Since we've smashed OLD_DECL to its
8915 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8919 /* Attempt to merge the declarations. This can fail, in
8920 the case of some invalid specialization declarations. */
8926 {
8930 }
8934 }
8935 }
8947 }
8949 /* decl is a FUNCTION_DECL.
8950 specifiers are the parsed virt-specifiers.
8952 Set flags to reflect the virt-specifiers.
8954 Returns decl. */
8956 static tree
8958 {
8966 }
8968 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8969 the linkage that DECL will receive in the object file. */
8971 static void
8973 {
8974 /* A static data member always has static storage duration and
8975 external linkage. Note that static data members are forbidden in
8976 local classes -- the only situation in which a class has
8977 non-external linkage. */
8980 /* For non-template classes, static data members are always put
8981 out in exactly those files where they are defined, just as
8982 with ordinary namespace-scope variables. */
8985 }
8987 /* Create a VAR_DECL named NAME with the indicated TYPE.
8989 If SCOPE is non-NULL, it is the class type or namespace containing
8990 the variable. If SCOPE is NULL, the variable should is created in
8991 the innermost enclosing scope. */
8993 static tree
8995 tree name,
8996 tree orig_declarator,
9003 tree scope)
9004 {
9005 tree decl;
9006 tree explicit_scope;
9013 /* Compute the scope in which to place the variable, but remember
9014 whether or not that scope was explicitly specified by the user. */
9017 {
9018 /* An explicit "extern" specifier indicates a namespace-scope
9019 variable. */
9024 }
9028 template, we need DECL_LANG_SPECIFIC. */
9030 /* Similarly for namespace-scope variables with language linkage
9031 other than C++. */
9034 /* Similarly for static data members. */
9036 /* Similarly for explicit specializations. */
9037 || (orig_declarator
9040 else
9045 else
9049 {
9052 }
9055 {
9057 /* This function is only called with out-of-class definitions. */
9060 }
9061 /* At top level, either `static' or no s.c. makes a definition
9062 (perhaps tentative), and absence of `static' makes it public. */
9064 {
9067 || ! constp
9068 || volatilep
9071 }
9072 /* Not at top level, only `static' makes a static definition. */
9073 else
9074 {
9077 }
9080 {
9082 {
9086 }
9089 }
9091 /* If the type of the decl has no linkage, make sure that we'll
9092 notice that in mark_used. */
9101 {
9102 /* [basic.link]: A name with no linkage (notably, the name of a class
9103 or enumeration declared in a local scope) shall not be used to
9104 declare an entity with linkage.
9106 DR 757 relaxes this restriction for C++0x. */
9109 }
9110 else
9118 /* Check that the variable can be safely declared as a concept.
9119 Note that this also forbids explicit specializations. */
9121 {
9123 {
9126 }
9127 else
9132 }
9135 {
9139 }
9141 // Handle explicit specializations and instantiations of variable templates.
9147 }
9149 /* Create and return a canonical pointer to member function type, for
9150 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
9152 tree
9154 {
9156 tree t;
9161 /* Make sure that we always have the unqualified pointer-to-member
9162 type first. */
9164 {
9167 }
9169 /* If a canonical type already exists for this type, use it. We use
9170 this method instead of type_hash_canon, because it only does a
9171 simple equality check on the list of field members. */
9178 /* Let the front end know this is a pointer to member function. */
9185 delta_type_node);
9191 /* Zap out the name so that the back end will give us the debugging
9192 information for this anonymous RECORD_TYPE. */
9195 /* Cache this pointer-to-member type so that we can find it again
9196 later. */
9205 }
9207 /* Create and return a pointer to data member type. */
9209 tree
9211 {
9213 {
9218 }
9219 else
9220 {
9223 }
9224 }
9226 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
9227 Check to see that the definition is valid. Issue appropriate error
9228 messages. Return 1 if the definition is particularly bad, or 0
9229 otherwise. */
9231 static int
9233 {
9234 /* Avoid redundant diagnostics on out-of-class definitions. */
9237 /* Can't check yet if we don't know the type. */
9240 /* If DECL is declared constexpr, we'll do the appropriate checks
9241 in check_initializer. Similarly for inline static data members. */
9247 {
9250 "in-class initialization of static data member %q#D of "
9254 "%<constexpr%> needed for in-class initialization of "
9256 else
9258 "in-class initialization of static data member %q#D of "
9261 }
9263 /* Motion 10 at San Diego: If a static const integral data member is
9264 initialized with an integral constant expression, the initializer
9265 may appear either in the declaration (within the class), or in
9266 the definition, but not both. If it appears in the class, the
9267 member is a member constant. The file-scope definition is always
9268 required. */
9270 {
9272 "invalid in-class initialization of static data member "
9274 type);
9276 }
9279 "ISO C++ forbids in-class initialization of non-const "
9281 decl);
9284 "ISO C++ forbids initialization of member constant "
9288 }
9290 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
9291 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
9292 expressions out into temporary variables so that walk_tree doesn't
9293 step into them (c++/15764). */
9295 static tree
9297 {
9301 {
9307 }
9311 }
9313 /* Entry point for the above. */
9315 static void
9317 {
9319 /* Break out any function calls into temporary variables. */
9321 }
9323 /* Reduce a SIZEOF_EXPR to its value. */
9325 tree
9327 {
9328 tree r;
9335 else
9341 }
9343 /* Given the SIZE (i.e., number of elements) in an array, compute
9344 an appropriate index type for the array. If non-NULL, NAME is
9345 the name of the entity being declared. */
9347 tree
9349 {
9350 tree itype;
9357 {
9364 /* In C++98, we mark a non-constant array bound with a magic
9366 else
9367 {
9372 {
9375 {
9381 else
9384 }
9388 }
9395 }
9400 /* The array bound must be an integer type. */
9402 {
9407 else
9411 }
9412 }
9414 /* A type is dependent if it is...an array type constructed from any
9415 dependent type or whose size is specified by a constant expression
9416 that is value-dependent. */
9417 /* We can only call value_dependent_expression_p on integral constant
9418 expressions; treat non-constant expressions as dependent, too. */
9422 {
9423 /* We cannot do any checking for a SIZE that isn't known to be
9424 constant. Just build the index type and mark that it requires
9425 structural equality checks. */
9432 }
9435 {
9440 /* Use the folded result for VLAs, too; it will have resolved
9441 SIZEOF_EXPR. */
9443 }
9445 /* Normally, the array-bound will be a constant. */
9447 {
9448 /* Check to see if the array bound overflowed. Make that an
9449 error, no matter how generous we're being. */
9452 /* An array must have a positive number of elements. */
9454 {
9459 else
9462 }
9463 /* As an extension we allow zero-sized arrays. */
9465 {
9467 /* We must fail if performing argument deduction (as
9468 indicated by the state of complain), so that
9469 another substitution can be found. */
9475 else
9477 }
9478 }
9480 /* We don't allow VLAs at non-function scopes, or during
9481 tentative template substitution. */
9484 {
9487 /* `(int) &fn' is not a valid array bound. */
9490 name);
9491 else
9494 }
9496 {
9499 else
9501 }
9503 {
9507 else
9510 }
9513 /* A variable sized array. */
9515 else
9516 {
9517 HOST_WIDE_INT saved_processing_template_decl;
9519 /* Compute the index of the largest element in the array. It is
9520 one less than the number of elements in the array. We save
9521 and restore PROCESSING_TEMPLATE_DECL so that computations in
9522 cp_build_binary_op will be appropriately folded. */
9526 MINUS_EXPR,
9529 complain),
9530 complain);
9535 {
9536 /* A variable sized array. */
9543 {
9544 /* We have to add 1 -- in the ubsan routine we generate
9545 LE_EXPR rather than LT_EXPR. */
9550 }
9551 }
9552 /* Make sure that there was no overflow when creating to a signed
9553 index type. (For example, on a 32-bit machine, an array with
9554 size 2^32 - 1 is too big.) */
9557 {
9562 }
9563 }
9565 /* Create and return the appropriate index type. */
9568 /* If the index type were dependent, we would have returned early, so
9569 remember that it isn't. */
9573 }
9575 /* Returns the scope (if any) in which the entity declared by
9576 DECLARATOR will be located. If the entity was declared with an
9577 unqualified name, NULL_TREE is returned. */
9579 tree
9581 {
9585 /* If the declarator-id is a SCOPE_REF, the scope in which the
9586 declaration occurs is the first operand. */
9591 /* Otherwise, the declarator is not a qualified name; the entity will
9592 be declared in the current scope. */
9594 }
9596 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
9597 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
9598 with this type. */
9600 static tree
9602 {
9605 /* If things have already gone awry, bail now. */
9609 /* 8.3.4/1: If the type of the identifier of D contains the auto
9610 type-specifier, the program is ill-formed. */
9612 {
9615 }
9617 /* If there are some types which cannot be array elements,
9618 issue an error-message and return. */
9620 {
9624 else
9631 else
9638 else
9645 else
9651 }
9653 /* [dcl.array]
9655 The constant expressions that specify the bounds of the arrays
9656 can be omitted only for the first member of the sequence. */
9658 {
9662 name);
9663 else
9668 }
9670 /* Figure out the index type for the array. */
9674 /* [dcl.array]
9675 T is called the array element type; this type shall not be [...] an
9676 abstract class type. */
9680 }
9682 /* Returns the smallest location != UNKNOWN_LOCATION among the
9683 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
9684 and LOCATIONS[ds_restrict]. */
9686 static location_t
9688 {
9703 }
9705 /* Check that it's OK to declare a function with the indicated TYPE
9706 and TYPE_QUALS. SFK indicates the kind of special function (if any)
9707 that this function is. OPTYPE is the type given in a conversion
9708 operator declaration, or the class type for a constructor/destructor.
9709 Returns the actual return type of the function; that may be different
9710 than TYPE if an error occurs, or for certain special functions. */
9712 static tree
9714 tree type,
9715 tree optype,
9718 {
9720 {
9730 else
9741 /* We can't use the proper return type here because we run into
9742 problems with ambiguous bases and covariant returns. */
9745 else
9754 "qualifiers are not allowed on declaration of "
9762 }
9765 }
9767 /* A variable or data member (whose unqualified name is IDENTIFIER)
9768 has been declared with the indicated TYPE. If the TYPE is not
9769 acceptable, issue an error message and return a type to use for
9770 error-recovery purposes. */
9772 tree
9774 {
9776 {
9780 {
9783 }
9784 else
9787 }
9790 }
9792 /* Handle declaring DECL as an inline variable. */
9794 static void
9796 {
9799 {
9803 }
9806 "inline variables are only available "
9809 {
9812 }
9813 }
9815 /* Given declspecs and a declarator (abstract or otherwise), determine
9816 the name and type of the object declared and construct a DECL node
9817 for it.
9819 DECLSPECS points to the representation of declaration-specifier
9820 sequence that precedes declarator.
9822 DECL_CONTEXT says which syntactic context this declaration is in:
9823 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9824 FUNCDEF for a function definition. Like NORMAL but a few different
9825 error messages in each case. Return value may be zero meaning
9826 this definition is too screwy to try to parse.
9827 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9828 handle member functions (which have FIELD context).
9829 Return value may be zero meaning this definition is too screwy to
9830 try to parse.
9831 PARM for a parameter declaration (either within a function prototype
9832 or before a function body). Make a PARM_DECL, or return void_type_node.
9833 TPARM for a template parameter declaration.
9834 CATCHPARM for a parameter declaration before a catch clause.
9835 TYPENAME if for a typename (in a cast or sizeof).
9836 Don't make a DECL node; just return the ..._TYPE node.
9837 FIELD for a struct or union field; make a FIELD_DECL.
9838 BITFIELD for a field with specified width.
9840 INITIALIZED is as for start_decl.
9842 ATTRLIST is a pointer to the list of attributes, which may be NULL
9843 if there are none; *ATTRLIST may be modified if attributes from inside
9844 the declarator should be applied to the declaration.
9846 When this function is called, scoping variables (such as
9847 CURRENT_CLASS_TYPE) should reflect the scope in which the
9848 declaration occurs, not the scope in which the new declaration will
9849 be placed. For example, on:
9851 void S::f() { ... }
9853 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
9854 should not be `S'.
9856 Returns a DECL (if a declarator is present), a TYPE (if there is no
9857 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
9858 error occurs. */
9860 tree
9866 {
9878 /* True if this declarator is a function definition. */
9882 #if 0
9883 /* See the code below that used this. */
9885 #endif
9887 /* Keep track of what sort of function is being processed
9888 so that we can warn about default return values, or explicit
9889 return values which do not match prescribed defaults. */
9895 /* cv-qualifiers that apply to the declarator, for a declaration of
9896 a member function. */
9898 /* virt-specifiers that apply to the declarator, for a declaration of
9899 a member function. */
9901 /* ref-qualifier that applies to the declarator, for a declaration of
9902 a member function. */
9904 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
9911 /* The unqualified name of the declarator; either an
9912 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
9913 tree unqualified_id;
9914 /* The class type, if any, in which this entity is located,
9915 or NULL_TREE if none. Note that this value may be different from
9916 the current class type; for example if an attempt is made to declare
9917 "A::f" inside "B", this value will be "A". */
9919 /* The NAMESPACE_DECL for the namespace in which this entity is
9920 located. If an unqualified name is used to declare the entity,
9921 this value will be NULL_TREE, even if the entity is located at
9922 namespace scope. */
9924 cp_storage_class storage_class;
9945 // Was concept_p specified? Note that ds_concept
9946 // implies ds_constexpr!
9977 /* Look inside a declarator for the name being declared
9978 and get it as a string, for an error message. */
9980 id_declarator;
9982 {
9987 {
9991 {
9995 }
9999 {
10005 {
10007 {
10008 /* [dcl.meaning]
10010 A declarator-id shall not be qualified except
10011 for ...
10013 None of the cases are permitted in block
10014 scope. */
10017 decl);
10021 else
10025 }
10027 {
10030 {
10033 }
10035 && current_class_type
10037 current_class_type))
10038 {
10042 }
10043 }
10046 }
10048 {
10050 {
10051 tree type;
10054 {
10057 }
10060 {
10063 }
10070 }
10074 {
10079 {
10082 else
10083 {
10086 }
10087 }
10088 }
10089 /* Fall through. */
10096 {
10098 dname);
10100 }
10103 else
10104 {
10111 else
10113 }
10118 }
10120 }
10137 }
10140 }
10142 /* [dcl.fct.edf]
10144 The declarator in a function-definition shall have the form
10145 D1 ( parameter-declaration-clause) ... */
10147 {
10150 }
10155 {
10158 }
10164 {
10167 }
10170 {
10172 {
10175 }
10177 {
10180 }
10181 }
10183 /* Anything declared one level down from the top level
10184 must be one of the parameters of a function
10185 (because the body is at least two levels down). */
10187 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
10188 by not allowing C++ class definitions to specify their parameters
10189 with xdecls (must be spec.d in the parmlist).
10191 Since we now wait to push a class scope until we are sure that
10192 we are in a legitimate method context, we must set oldcname
10193 explicitly (since current_class_name is not yet alive).
10195 We also want to avoid calling this a PARM if it is in a namespace. */
10198 {
10204 }
10210 {
10213 }
10216 {
10219 }
10221 /* If there were multiple types specified in the decl-specifier-seq,
10222 issue an error message. */
10224 {
10227 }
10230 {
10233 }
10235 /* Extract the basic type from the decl-specifier-seq. */
10238 {
10241 }
10242 /* If the entire declaration is itself tagged as deprecated then
10243 suppress reports of deprecated items. */
10248 {
10255 }
10256 /* No type at all: default to `int', and set DEFAULTED_INT
10257 because it was not a user-defined typedef. */
10259 {
10261 {
10262 /* These imply 'int'. */
10265 }
10266 /* If we just have "complex", it is equivalent to "complex double". */
10269 {
10272 "ISO C++ does not support plain %<complex%> meaning "
10274 }
10275 }
10276 /* Gather flags. */
10280 #if 0
10281 /* See the code below that used this. */
10284 #endif
10292 {
10294 ctor_return_type,
10295 type_quals,
10298 }
10300 {
10305 /* We handle `main' specially here, because 'main () { }' is so
10306 common. With no options, it is allowed. With -Wreturn-type,
10307 it is a warning. It is only an error with -pedantic-errors. */
10308 is_main = (funcdef_flag
10324 else
10329 /* FIXME we should be able to propagate the error_mark_node as is
10330 for other contexts too. */
10332 else
10334 }
10339 {
10341 {
10345 }
10350 }
10352 /* Now process the modifiers that were specified
10353 and check for invalid combinations. */
10355 /* Long double is a special combination. */
10357 {
10361 }
10363 /* Check all other uses of type modifiers. */
10366 {
10388 {
10393 }
10394 else
10395 {
10398 {
10401 name);
10404 }
10405 }
10407 /* Discard the type modifiers if they are invalid. */
10409 {
10415 }
10416 }
10418 /* Decide whether an integer type is signed or not.
10419 Optionally treat bitfields as signed by default. */
10421 /* [class.bit]
10423 It is implementation-defined whether a plain (neither
10424 explicitly signed or unsigned) char, short, int, or long
10425 bit-field is signed or unsigned.
10427 Naturally, we extend this to long long as well. Note that
10428 this does not include wchar_t. */
10430 && !signed_p
10431 /* A typedef for plain `int' without `signed' can be
10432 controlled just like plain `int', but a typedef for
10433 `signed int' cannot be so controlled. */
10434 && !(typedef_decl
10438 {
10451 else
10453 }
10466 {
10469 /* If a modifier is specified, the resulting complex is the complex
10470 form of TYPE. E.g, "complex short" is "complex short int". */
10479 else
10481 }
10483 /* If we're using the injected-class-name to form a compound type or a
10484 declaration, replace it with the underlying class so we don't get
10485 redundant typedefs in the debug output. But if we are returning the
10486 type unchanged, leave it alone so that it's available to
10487 maybe_get_template_decl_from_type_decl. */
10495 type = cp_build_qualified_type_real
10499 /* We might have ignored or rejected some of the qualifiers. */
10506 {
10510 }
10522 {
10524 {
10529 }
10533 }
10536 /* Issue errors about use of storage classes for parameters. */
10538 {
10540 {
10543 }
10545 {
10548 }
10554 /* Function parameters cannot be concept. */
10557 /* Function parameters cannot be constexpr. If we saw one, moan
10558 and pretend it wasn't there. */
10560 {
10563 }
10564 }
10566 /* Give error if `virtual' is used outside of class declaration. */
10569 {
10573 }
10576 {
10591 declspecs->gnu_thread_keyword_p
10597 {
10622 }
10625 {
10627 {
10631 "type must be cv-qualified %<auto%> or reference to "
10633 }
10636 }
10646 }
10648 /* Static anonymous unions are dealt with here. */
10654 /* Warn about storage classes that are invalid for certain
10655 kinds of declarations (parameters, typenames, etc.). */
10657 && ((storage_class
10661 {
10664 }
10669 {
10673 ;
10675 ;
10677 /* C++ allows static class elements. */
10679 /* C++ also allows inlines and signed and unsigned elements,
10680 but in those cases we don't come in here. */
10681 ;
10682 else
10683 {
10686 else
10687 {
10690 else
10692 }
10698 }
10699 }
10704 {
10707 }
10711 {
10716 /* When thread_local is applied to a variable of block scope the
10717 storage-class-specifier static is implied if it does not appear
10718 explicitly. */
10721 }
10724 {
10728 }
10732 else
10733 {
10736 {
10749 }
10750 }
10753 {
10754 /* Apply the c++11 attributes to the type preceding them. */
10758 }
10760 /* Determine the type of the entity declared by recurring on the
10761 declarator. */
10763 {
10765 tree attrs;
10772 {
10784 attr_flags);
10785 }
10793 {
10801 /* [dcl.array]/1:
10803 The optional attribute-specifier-seq appertains to the
10804 array. */
10810 {
10811 tree arg_types;
10814 /* Declaring a function type.
10815 Make sure we have a valid type for the function to return. */
10818 {
10820 {
10823 }
10824 /* We now know that the TYPE_QUALS don't apply to the
10825 decl, but to its return type. */
10827 }
10829 /* Error about some types functions can't return. */
10832 {
10835 }
10837 {
10840 }
10846 /* Pick up type qualifiers which should be applied to `this'. */
10848 /* Pick up virt-specifiers. */
10850 /* And ref-qualifier, too */
10852 /* And tx-qualifier. */
10854 /* Pick up the exception specifications. */
10856 /* If the exception-specification is ill-formed, let's pretend
10857 there wasn't one. */
10865 /* Say it's a definition only for the CALL_EXPR
10866 closest to the identifier. */
10869 /* Handle a late-specified return type. */
10872 {
10874 {
10876 {
10881 {
10883 "%<auto%> type specifier without trailing "
10886 "only available with -std=c++14 or "
10888 }
10890 {
10894 }
10895 }
10897 {
10902 }
10904 {
10906 {
10911 else
10916 }
10922 else
10926 }
10927 }
10930 {
10932 /* Not using maybe_warn_cpp0x because this should
10933 always be an error. */
10936 else
10940 }
10941 }
10951 && funcdecl_p
10957 {
10958 /* We are within a class's scope. If our declarator name
10959 is the same as the class name, and we are defining
10960 a function, then it is a constructor/destructor, and
10961 therefore returns a void type. */
10963 /* ISO C++ 12.4/2. A destructor may not be declared
10964 const or volatile. A destructor may not be static.
10965 A destructor may not be declared with ref-qualifier.
10967 ISO C++ 12.1. A constructor may not be declared
10968 const or volatile. A constructor may not be
10969 virtual. A constructor may not be static.
10970 A constructor may not be declared with ref-qualifier. */
10976 {
10981 }
10984 {
10990 }
10994 current_class_type,
10995 flags))
10999 {
11000 /* It's a constructor. */
11004 {
11008 }
11012 }
11015 }
11017 {
11019 {
11020 /* Cannot be both friend and virtual. */
11023 }
11029 name);
11030 }
11032 {
11034 {
11037 }
11040 }
11049 {
11053 }
11059 {
11061 /* transaction_safe applies to the type, but
11062 transaction_safe_dynamic applies to the function. */
11065 else
11067 }
11069 /* [dcl.fct]/2:
11071 The optional attribute-specifier-seq appertains to
11072 the function type. */
11077 }
11083 /* Filter out pointers-to-references and references-to-references.
11084 We can get these if a TYPE_DECL is used. */
11087 {
11089 {
11092 }
11094 /* In C++0x, we allow reference to reference declarations
11095 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
11096 and template type arguments [14.3.1/4 temp.arg.type]. The
11097 check for direct reference to reference declarations, which
11098 are still forbidden, occurs below. Reasoning behind the change
11099 can be found in DR106, DR540, and the rvalue reference
11100 proposals. */
11102 {
11105 }
11106 }
11108 {
11113 }
11115 /* We now know that the TYPE_QUALS don't apply to the decl,
11116 but to the target of the pointer. */
11119 /* This code used to handle METHOD_TYPE, but I don't think it's
11120 possible to get it here anymore. */
11124 {
11128 memfn_quals,
11129 rqual);
11135 }
11143 type);
11145 /* When the pointed-to type involves components of variable size,
11146 care must be taken to ensure that the size evaluation code is
11147 emitted early enough to dominate all the possible later uses
11148 and late enough for the variables on which it depends to have
11149 been assigned.
11151 This is expected to happen automatically when the pointed-to
11152 type has a name/declaration of it's own, but special attention
11153 is required if the type is anonymous.
11155 We handle the NORMAL and FIELD contexts here by inserting a
11156 dummy statement that just evaluates the size at a safe point
11157 and ensures it is not deferred until e.g. within a deeper
11158 conditional context (c++/43555).
11160 We expect nothing to be needed here for PARM or TYPENAME.
11161 Evaluating the size at this point for TYPENAME would
11162 actually be incorrect, as we might be in the middle of an
11163 expression with side effects on the pointed-to type size
11164 "arguments" prior to the pointer declaration point and the
11165 size evaluation could end up prior to the side effects. */
11171 {
11175 }
11178 {
11179 /* In C++0x, the type we are creating a reference to might be
11180 a typedef which is itself a reference type. In that case,
11181 we follow the reference collapsing rules in
11182 [7.1.3/8 dcl.typedef] to create the final reference type:
11184 "If a typedef TD names a type that is a reference to a type
11185 T, an attempt to create the type 'lvalue reference to cv TD'
11186 creates the type 'lvalue reference to T,' while an attempt
11187 to create the type "rvalue reference to cv TD' creates the
11188 type TD."
11189 */
11193 {
11196 else
11198 }
11199 else
11200 type = cp_build_reference_type
11203 /* In C++0x, we need this check for direct reference to
11204 reference declarations, which are forbidden by
11205 [8.3.2/5 dcl.ref]. Reference to reference declarations
11206 are only allowed indirectly through typedefs and template
11207 type arguments. Example:
11209 void foo(int & &); // invalid ref-to-ref decl
11211 typedef int & int_ref;
11212 void foo(int_ref &); // valid ref-to-ref decl
11213 */
11217 }
11221 {
11225 /* We will already have complained. */
11227 else
11229 type);
11230 }
11231 else
11234 /* Process a list of type modifier keywords (such as
11235 const or volatile) that were given inside the `*' or `&'. */
11238 {
11239 type
11243 }
11245 /* Apply C++11 attributes to the pointer, and not to the
11246 type pointed to. This is unlike what is done for GNU
11247 attributes above. It is to comply with [dcl.ptr]/1:
11249 [the optional attribute-specifier-seq (7.6.1) appertains
11250 to the pointer and not to the object pointed to]. */
11263 }
11264 }
11266 /* A `constexpr' specifier used in an object declaration declares
11267 the object as `const'. */
11269 {
11270 /* DR1688 says that a `constexpr' specifier in combination with
11271 `volatile' is valid. */
11274 {
11277 }
11278 }
11284 {
11286 unqualified_id);
11288 }
11290 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
11291 qualified with a class-name, turn it into a METHOD_TYPE, unless
11292 we know that the function is static. We take advantage of this
11293 opportunity to do other processing that pertains to entities
11294 explicitly declared to be class members. Note that if DECLARATOR
11295 is non-NULL, we know it is a cdk_id declarator; otherwise, we
11296 would not have exited the loop above. */
11301 {
11307 {
11309 {
11313 }
11314 else
11318 }
11320 can skip the following checks. */
11323 qualifying type must certainly be complete. */
11324 funcdef_flag
11325 /* A friend declaration of "T::f" is OK, even if
11326 "T" is a template parameter. But, if this
11327 function is not a friend, the qualifying type
11328 must be a class. */
11330 /* For a declaration, the type need not be
11331 complete, if either it is dependent (since there
11332 is no meaningful definition of complete in that
11333 case) or the qualifying class is currently being
11334 defined. */
11337 /* Check that the qualifying type is complete. */
11341 {
11344 {
11352 }
11353 }
11355 {
11359 }
11360 }
11365 /* Now TYPE has the actual type. */
11368 {
11371 else
11373 }
11378 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
11379 a declarator-id appertains to the entity that is declared. */
11382 /* Handle parameter packs. */
11384 {
11386 /* Turn the type into a pack expansion.*/
11388 else
11390 }
11393 && !processing_template_decl
11395 {
11398 else
11401 }
11404 {
11405 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
11406 in the declaration of a constructor or conversion function within
11407 a class definition. */
11414 else
11416 "only declarations of constructors and conversion operators "
11419 }
11422 {
11424 {
11427 }
11429 {
11432 }
11435 {
11438 }
11440 {
11443 }
11445 {
11448 }
11450 {
11454 }
11455 }
11457 /* If this is declaring a typedef name, return a TYPE_DECL. */
11459 {
11460 tree decl;
11462 /* This declaration:
11464 typedef void f(int) const;
11466 declares a function type which is not a member of any
11467 particular class, but which is cv-qualified; for
11468 example "f S::*" declares a pointer to a const-qualified
11469 member function of S. We record the cv-qualification in the
11470 function type. */
11472 {
11475 /* We have now dealt with these qualifiers. */
11478 }
11481 {
11484 }
11491 else
11497 }
11500 {
11504 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
11506 /* The TYPE_DECL is "abstract" because there will be
11507 clones of this constructor/destructor, and there will
11508 be copies of this TYPE_DECL generated in those
11509 clones. The decloning optimization (for space) may
11510 revert this subsequently if it determines that
11511 the clones should share a common implementation. */
11513 }
11518 unqualified_id);
11520 /* If the user declares "typedef struct {...} foo" then the
11521 struct will have an anonymous name. Fill that name in now.
11522 Nothing can refer to it, so nothing needs know about the name
11523 change. */
11525 && unqualified_id
11532 {
11533 tree t;
11535 /* Replace the anonymous name with the real name everywhere. */
11537 {
11539 /* We do not rename the debug info representing the
11540 unnamed tagged type because the standard says in
11541 [dcl.typedef] that the naming applies only for
11542 linkage purposes. */
11543 /*debug_hooks->set_name (t, decl);*/
11545 }
11550 /* If this is a typedef within a template class, the nested
11551 type is a (non-primary) template. The name for the
11552 template needs updating as well. */
11557 /* Adjust linkage now that we aren't unnamed anymore. */
11560 /* FIXME remangle member functions; member functions of a
11561 type with external linkage have external linkage. */
11562 }
11573 /* Acknowledge that this was written:
11574 `using analias = atype;'. */
11578 }
11580 /* Detect the case of an array type of unspecified size
11581 which came, as such, direct from a typedef name.
11582 We must copy the type, so that the array's domain can be
11583 individually set by the object's initializer. */
11590 /* Detect where we're using a typedef of function type to declare a
11591 function. PARMS will not be set, so we must create it now. */
11594 {
11596 tree args;
11601 {
11606 }
11611 {
11612 /* The qualifiers on the function type become the qualifiers on
11613 the non-static member function. */
11617 }
11618 }
11620 /* If this is a type name (such as, in a cast or sizeof),
11621 compute the type and return it now. */
11624 {
11625 /* Note that here we don't care about type_quals. */
11627 /* Special case: "friend class foo" looks like a TYPENAME context. */
11629 {
11631 {
11634 }
11637 {
11638 /* Don't allow friend declaration without a class-key. */
11645 else
11648 type);
11649 }
11651 /* Only try to do this stuff if we didn't already give up. */
11653 {
11654 /* A friendly class? */
11658 else
11660 type);
11663 }
11664 }
11666 {
11673 /* Core issue #547: need to allow this in template type args.
11674 Allow it in general in C++11 for alias-declarations. */
11678 else
11680 }
11686 }
11690 && ! bitfield
11692 {
11695 }
11697 /* Only functions may be declared using an operator-function-id. */
11702 {
11705 }
11712 type);
11714 /* We don't check parameter types here because we can emit a better
11715 error message later. */
11717 {
11721 }
11723 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
11724 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
11727 {
11733 {
11736 else
11739 }
11741 /* A parameter declared as an array of T is really a pointer to T.
11742 One declared as a function is really a pointer to a function.
11743 One declared as a member is really a pointer to member. */
11746 {
11747 /* Transfer const-ness of array into that of type pointed to. */
11751 }
11754 }
11758 {
11764 }
11766 {
11770 {
11777 }
11779 {
11782 {
11788 else
11792 }
11794 /* The C99 flexible array extension. */
11797 {
11801 {
11804 }
11805 else
11806 {
11807 /* Array is a flexible member. */
11809 /* Do not warn on flexible array members in system
11814 else
11818 /* Flexible array member has a null domain. */
11820 }
11821 }
11824 {
11825 /* Happens when declaring arrays of sizes which
11826 are error_mark_node, for example. */
11828 }
11830 {
11831 /* Something like struct S { int N::j; }; */
11834 }
11837 {
11839 tree function_context;
11842 {
11843 /* This should never happen in pure C++ (the check
11844 could be an assert). It could happen in
11845 Objective-C++ if someone writes invalid code that
11846 uses a function declaration for an instance
11847 variable or property (instance variables and
11848 properties are parsed as FIELD_DECLs, but they are
11849 part of an Objective-C class, not a C++ class).
11850 That code is invalid and is caught by this
11851 check. */
11853 {
11855 unqualified_id);
11857 }
11859 /* ``A union may [ ... ] not [ have ] virtual functions.''
11860 ARM 9.5 */
11862 {
11864 unqualified_id);
11866 }
11869 {
11871 {
11874 unqualified_id);
11876 }
11877 }
11878 }
11880 /* Check that the name used for a destructor makes sense. */
11882 {
11886 {
11891 }
11894 {
11898 }
11900 {
11903 }
11905 {
11908 }
11909 }
11911 {
11916 }
11919 {
11922 }
11924 {
11927 }
11930 {
11933 {
11939 }
11940 }
11942 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
11954 parms,
11955 unqualified_id,
11956 reqs,
11966 #if 0
11967 /* This clobbers the attrs stored in `decl' from `attrlist'. */
11968 /* The decl and setting of decl_attr is also turned off. */
11970 #endif
11972 /* [class.conv.ctor]
11974 A constructor declared without the function-specifier
11975 explicit that can be called with a single parameter
11976 specifies a conversion from the type of its first
11977 parameter to the type of its class. Such a constructor
11978 is called a converting constructor. */
11981 }
11986 {
11989 {
11991 {
11995 }
11996 else
12001 }
12002 }
12003 else
12004 {
12006 {
12010 }
12012 }
12015 {
12016 /* Friends are treated specially. */
12020 {
12022 {
12023 decl = check_explicit_specialization
12028 }
12032 funcdef_flag);
12034 }
12035 else
12037 }
12039 /* Structure field. It may not be a function, except for C++. */
12042 {
12044 {
12045 /* C++ allows static class members. All other work
12046 for this is done by grokfield. */
12053 {
12059 }
12062 unqualified_id);
12064 {
12068 }
12075 /* Even if there is an in-class initialization, DECL
12076 is considered undefined until an out-of-class
12077 definition is provided, unless this is an inline
12078 variable. */
12080 }
12081 else
12082 {
12085 unqualified_id);
12087 {
12089 unqualified_id);
12091 }
12099 {
12102 }
12105 {
12106 /* An attempt is being made to initialize a non-static
12107 member. This is new in C++11. */
12110 /* If this has been parsed with static storage class, but
12111 errors forced staticp to be cleared, ensure NSDMI is
12112 not present. */
12115 }
12116 }
12122 }
12123 }
12126 {
12127 tree original_name;
12135 else
12143 {
12146 name);
12147 else
12149 name);
12150 }
12154 /* Function declaration not at top level.
12155 Storage classes other than `extern' are not allowed
12156 and `extern' makes no difference. */
12161 {
12164 "%<static%> specifier invalid for function %qs "
12166 else
12168 "%<inline%> specifier invalid for function %qs "
12170 }
12173 {
12175 {
12178 }
12181 {
12186 }
12187 }
12189 /* Record whether the function is public. */
12199 publicp,
12202 sfk,
12203 funcdef_flag,
12210 {
12213 /* Don't allow a static member function in a class, and forbid
12214 declaring main to be static. */
12216 {
12220 }
12222 {
12223 /* 7.1.1: There can be no static function declarations within a
12224 block. */
12227 }
12230 {
12233 }
12234 }
12235 }
12236 else
12237 {
12238 /* It's a variable. */
12240 /* An uninitialized decl with `extern' is a reference. */
12242 declspecs,
12243 initialized,
12244 type_quals,
12245 inlinep,
12246 concept_p,
12247 template_count,
12257 {
12260 {
12265 }
12267 {
12270 }
12272 {
12274 "cannot explicitly declare member %q#D to have "
12277 }
12278 }
12280 {
12282 decl);
12284 }
12289 {
12295 }
12296 }
12300 {
12303 {
12308 }
12309 else
12312 }
12315 {
12317 {
12318 /* It's common practice (and completely valid) to have a const
12319 be initialized and declared extern. */
12322 }
12323 else
12324 {
12327 }
12328 }
12330 /* Record `register' declaration for warnings on &
12331 and in case doing stupid register allocation. */
12334 {
12336 /* Warn about register storage specifiers on PARM_DECLs. */
12338 {
12341 "ISO C++1z does not allow %<register%> storage "
12343 else
12346 }
12347 }
12353 /* Set constexpr flag on vars (functions got it in grokfndecl). */
12357 /* Record constancy and volatility on the DECL itself . There's
12358 no need to do this when processing a template; we'll do this
12359 for the instantiated declaration based on the type of DECL. */
12364 }
12365 }
12366 \f
12367 /* Subroutine of start_function. Ensure that each of the parameter
12368 types (as listed in PARMS) is complete, as is required for a
12369 function definition. */
12371 static void
12373 {
12375 {
12380 {
12383 }
12384 else
12385 /* grokparms or complete_type_or_else will have already issued
12386 an error. */
12388 }
12389 }
12391 /* Returns nonzero if T is a local variable. */
12393 int
12395 {
12397 /* A VAR_DECL with a context that is a _TYPE is a static data
12398 member. */
12400 /* Any other non-local variable must be at namespace scope. */
12406 }
12408 /* Like local_variable_p, but suitable for use as a tree-walking
12409 function. */
12411 static tree
12414 {
12422 }
12424 /* Check that ARG, which is a default-argument expression for a
12425 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
12426 something goes wrong. DECL may also be a _TYPE node, rather than a
12427 DECL, if there is no DECL available. */
12429 tree
12431 {
12432 tree var;
12433 tree decl_type;
12436 /* We get a DEFAULT_ARG when looking at an in-class declaration
12437 with a default argument. Ignore the argument for now; we'll
12438 deal with it after the class is complete. */
12442 {
12445 }
12446 else
12453 /* Something already went wrong. There's no need to check
12454 further. */
12457 /* [dcl.fct.default]
12459 A default argument expression is implicitly converted to the
12460 parameter type. */
12463 LOOKUP_IMPLICIT);
12466 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
12467 the call sites. */
12472 /* [dcl.fct.default]
12474 Local variables shall not be used in default argument
12475 expressions.
12477 The keyword `this' shall not be used in a default argument of a
12478 member function. */
12481 {
12483 {
12487 else
12489 }
12491 }
12493 /* All is well. */
12495 }
12497 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
12499 static tree
12501 {
12506 {
12509 else
12511 }
12513 /* Do warn about using typedefs to a deprecated class. */
12525 return type_is_deprecated
12529 }
12531 /* Decode the list of parameter types for a function type.
12532 Given the list of things declared inside the parens,
12533 return a list of types.
12535 If this parameter does not end with an ellipsis, we append
12536 void_list_node.
12538 *PARMS is set to the chain of PARM_DECLs created. */
12540 tree
12542 {
12545 tree parm;
12549 {
12562 {
12564 && !init
12567 /* DR 577: A parameter list consisting of a single
12568 unnamed parameter of non-dependent type 'void'. */
12572 "invalid use of cv-qualified type %qT in "
12574 else
12576 "invalid use of type %<void%> in parameter "
12578 /* It's not a good idea to actually create parameters of
12579 type `void'; other parts of the compiler assume that a
12580 void type terminates the parameter list. */
12583 }
12586 {
12588 {
12592 }
12594 /* Top-level qualifiers on the parameters are
12595 ignored for function types. */
12598 {
12602 }
12606 {
12607 /* [dcl.fct]/6, parameter types cannot contain pointers
12608 (references) to arrays of unknown bound. */
12613 {
12621 }
12629 }
12635 }
12640 }
12648 }
12650 \f
12651 /* D is a constructor or overloaded `operator='.
12653 Let T be the class in which D is declared. Then, this function
12654 returns:
12656 -1 if D's is an ill-formed constructor or copy assignment operator
12657 whose first parameter is of type `T'.
12658 0 if D is not a copy constructor or copy assignment
12659 operator.
12660 1 if D is a copy constructor or copy assignment operator whose
12661 first parameter is a reference to non-const qualified T.
12662 2 if D is a copy constructor or copy assignment operator whose
12663 first parameter is a reference to const qualified T.
12665 This function can be used as a predicate. Positive values indicate
12666 a copy constructor and nonzero values indicate a copy assignment
12667 operator. */
12669 int
12671 {
12672 tree args;
12673 tree arg_type;
12681 /* Instantiations of template member functions are never copy
12682 functions. Note that member functions of templated classes are
12683 represented as template functions internally, and we must
12684 accept those as copy functions. */
12696 {
12697 /* Pass by value copy assignment operator. */
12699 }
12703 {
12706 }
12707 else
12713 /* There are more non-optional args. */
12717 }
12719 /* D is a constructor or overloaded `operator='.
12721 Let T be the class in which D is declared. Then, this function
12722 returns true when D is a move constructor or move assignment
12723 operator, false otherwise. */
12725 bool
12727 {
12731 /* There are no move constructors if we are in C++98 mode. */
12737 /* Instantiations of template member functions are never move
12738 functions. Note that member functions of templated classes are
12739 represented as template functions internally, and we must
12740 accept those as move functions. */
12744 }
12746 /* D is a constructor or overloaded `operator='.
12748 Then, this function returns true when D has the same signature as a move
12749 constructor or move assignment operator (because either it is such a
12750 ctor/op= or it is a template specialization with the same signature),
12751 false otherwise. */
12753 bool
12755 {
12756 tree args;
12757 tree arg_type;
12777 /* There are more non-optional args. */
12781 }
12783 /* Remember any special properties of member function DECL. */
12785 void
12787 {
12788 tree class_type;
12795 {
12802 {
12803 /* [class.copy]
12805 A non-template constructor for class X is a copy
12806 constructor if its first parameter is of type X&, const
12807 X&, volatile X& or const volatile X&, and either there
12808 are no other parameters or else all other parameters have
12809 default arguments. */
12815 }
12826 }
12828 {
12829 /* [class.copy]
12831 A non-template assignment operator for class X is a copy
12832 assignment operator if its parameter is of type X, X&, const
12833 X&, volatile X& or const volatile X&. */
12838 {
12844 }
12847 }
12848 /* Destructors are handled in check_methods. */
12849 }
12851 /* Check a constructor DECL has the correct form. Complains
12852 if the class has a constructor of the form X(X). */
12854 int
12856 {
12860 {
12861 /* [class.copy]
12863 A declaration of a constructor for a class X is ill-formed if
12864 its first parameter is of type (optionally cv-qualified) X
12865 and either there are no other parameters or else all other
12866 parameters have default arguments.
12868 We *don't* complain about member template instantiations that
12869 have this form, though; they can occur as we try to decide
12870 what constructor to use during overload resolution. Since
12871 overload resolution will never prefer such a constructor to
12872 the non-template copy constructor (which is either explicitly
12873 or implicitly defined), there's no need to worry about their
12874 existence. Theoretically, they should never even be
12875 instantiated, but that's hard to forestall. */
12879 }
12882 }
12884 /* An operator with this code is unary, but can also be binary. */
12886 static int
12888 {
12895 }
12897 /* An operator with this name can only be unary. */
12899 static int
12901 {
12906 }
12908 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
12909 errors are issued for invalid declarations. */
12911 bool
12913 {
12915 tree argtype;
12921 tree class_type;
12923 /* Count the number of arguments and check for ellipsis. */
12936 else
12937 do
12938 {
12939 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
12940 if (ansi_opname (CODE) == name) \
12941 { \
12942 operator_code = (CODE); \
12943 break; \
12944 } \
12945 else if (ansi_assopname (CODE) == name) \
12946 { \
12947 operator_code = (CODE); \
12948 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
12949 break; \
12950 }
12953 #undef DEF_OPERATOR
12956 }
12963 {
12982 }
12984 /* [basic.std.dynamic.allocation]/1:
12986 A program is ill-formed if an allocation function is declared
12987 in a namespace scope other than global scope or declared static
12988 in global scope.
12990 The same also holds true for deallocation functions. */
12993 {
12995 {
12997 {
13000 }
13002 {
13005 }
13006 }
13007 }
13010 {
13013 }
13016 else
13017 {
13018 /* An operator function must either be a non-static member function
13019 or have at least one parameter of a class, a reference to a class,
13020 an enumeration, or a reference to an enumeration. 13.4.0.6 */
13022 {
13028 {
13031 }
13032 else
13033 {
13034 tree p;
13037 {
13041 }
13044 {
13049 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
13050 because these checks are performed even on
13051 template functions. */
13055 }
13058 {
13063 }
13064 }
13065 }
13067 /* There are no restrictions on the arguments to an overloaded
13068 "operator ()". */
13072 /* Warn about conversion operators that will never be used. */
13075 && warn_conversion
13076 /* Warn only declaring the function; there is no need to
13077 warn again about out-of-class definitions. */
13079 {
13088 ref
13094 {
13097 ref
13102 /* Don't force t to be complete here. */
13107 ref
13112 }
13114 }
13117 {
13118 /* 13.4.0.3 */
13121 }
13123 {
13126 }
13128 {
13130 /* We pick the one-argument operator codes by default, so
13131 we don't have to change anything. */
13132 ;
13134 {
13135 /* If we thought this was a unary operator, we now know
13136 it to be a binary operator. */
13138 {
13165 }
13171 && ! processing_template_decl
13173 {
13176 decl);
13177 else
13181 }
13182 }
13183 else
13184 {
13187 else
13190 }
13192 /* More Effective C++ rule 6. */
13198 {
13206 {
13209 arg))
13212 }
13213 else
13214 {
13217 }
13218 }
13219 }
13221 {
13223 {
13226 else
13229 }
13230 }
13232 {
13234 {
13237 else
13240 }
13242 /* More Effective C++ rule 7. */
13248 decl);
13249 }
13251 /* Effective C++ rule 23. */
13263 /* [over.oper]/8 */
13267 {
13271 {
13273 decl);
13274 }
13275 else
13276 {
13279 }
13280 }
13281 }
13283 }
13284 \f
13285 /* Return a string giving the keyword associate with CODE. */
13289 {
13291 {
13304 }
13305 }
13307 /* Name lookup in an elaborated-type-specifier (after the keyword
13308 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
13309 elaborated-type-specifier is invalid, issue a diagnostic and return
13310 error_mark_node; otherwise, return the *_TYPE to which it referred.
13311 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
13313 tree
13315 tree decl,
13317 {
13318 tree type;
13320 /* In the case of:
13322 struct S { struct S *p; };
13324 name lookup will find the TYPE_DECL for the implicit "S::S"
13325 typedef. Adjust for that here. */
13331 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
13332 is false for this case as well. */
13334 {
13338 }
13339 /* Accept template template parameters. */
13343 ;
13344 /* [dcl.type.elab]
13346 If the identifier resolves to a typedef-name or the
13347 simple-template-id resolves to an alias template
13348 specialization, the elaborated-type-specifier is ill-formed.
13350 In other words, the only legitimate declaration to use in the
13351 elaborated type specifier is the implicit typedef created when
13352 the type is declared. */
13356 {
13360 else
13365 }
13370 {
13374 }
13377 {
13381 }
13385 {
13386 /* If a class template appears as elaborated type specifier
13387 without a template header such as:
13389 template <class T> class C {};
13390 void f(class C); // No template header here
13392 then the required template argument is missing. */
13397 }
13400 }
13402 /* Lookup NAME in elaborate type specifier in scope according to
13403 SCOPE and issue diagnostics if necessary.
13404 Return *_TYPE node upon success, NULL_TREE when the NAME is not
13405 found, and ERROR_MARK_NODE for type error. */
13407 static tree
13410 {
13411 tree t;
13412 tree decl;
13414 {
13415 /* First try ordinary name lookup, ignoring hidden class name
13416 injected via friend declaration. */
13419 /* If that fails, the name will be placed in the smallest
13420 non-class, non-function-prototype scope according to 3.3.1/5.
13421 We may already have a hidden name declared as friend in this
13422 scope. So lookup again but not ignoring hidden names.
13423 If we find one, that name will be made visible rather than
13424 creating a new tag. */
13427 }
13428 else
13433 /* If scope is ts_current we're defining a class, so ignore a
13434 template template parameter. */
13440 {
13441 /* Look for invalid nested type:
13442 class C {
13443 class C {};
13444 }; */
13446 {
13449 decl);
13451 }
13453 /* Two cases we need to consider when deciding if a class
13454 template is allowed as an elaborated type specifier:
13455 1. It is a self reference to its own class.
13456 2. It comes with a template header.
13458 For example:
13460 template <class T> class C {
13461 class C *c1; // DECL_SELF_REFERENCE_P is true
13462 class D;
13463 };
13464 template <class U> class C; // template_header_p is true
13465 template <class T> class C<T>::D {
13466 class C *c2; // DECL_SELF_REFERENCE_P is true
13467 }; */
13470 decl,
13471 template_header_p
13476 {
13485 }
13488 }
13490 {
13494 }
13495 else
13497 }
13499 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
13500 Define the tag as a forward-reference if it is not defined.
13502 If a declaration is given, process it here, and report an error if
13503 multiple declarations are not identical.
13505 SCOPE is TS_CURRENT when this is also a definition. Only look in
13506 the current frame for the name (since C++ allows new names in any
13507 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
13508 declaration. Only look beginning from the current scope outward up
13509 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
13511 TEMPLATE_HEADER_P is true when this declaration is preceded by
13512 a set of template parameters. */
13514 static tree
13517 {
13519 tree t;
13521 tag_scope scope;
13526 {
13539 }
13543 else
13546 /* In case of anonymous name, xref_tag is only called to
13547 make type node and push name. Name lookup is not required. */
13550 else
13560 {
13564 /* Since SCOPE is not TS_CURRENT, we are not looking at a
13565 definition of this tag. Since, in addition, we are currently
13566 processing a (member) template declaration of a template
13567 class, we must be very careful; consider:
13569 template <class X>
13570 struct S1
13572 template <class U>
13573 struct S2
13574 { template <class V>
13575 friend struct S1; };
13577 Here, the S2::S1 declaration should not be confused with the
13578 outer declaration. In particular, the inner version should
13579 have a template parameter of level 2, not level 1. This
13580 would be particularly important if the member declaration
13581 were instead:
13583 template <class V = U> friend struct S1;
13585 say, when we should tsubst into `U' when instantiating
13586 S2. On the other hand, when presented with:
13588 template <class T>
13589 struct S1 {
13590 template <class U>
13591 struct S2 {};
13592 template <class U>
13593 friend struct S2;
13594 };
13596 we must find the inner binding eventually. We
13597 accomplish this by making sure that the new type we
13598 create to represent this declaration has the right
13599 TYPE_CONTEXT. */
13602 }
13605 {
13606 /* If no such tag is yet defined, create a forward-reference node
13607 and record it as the "definition".
13608 When a real declaration of this type is found,
13609 the forward-reference will be altered into a real type. */
13611 {
13614 }
13615 else
13616 {
13620 /* Remember that we're declaring a lambda to avoid bogus errors
13621 in push_template_decl. */
13624 }
13625 }
13626 else
13627 {
13629 {
13630 /* Check that we aren't trying to overload a class with different
13631 constraints. */
13634 {
13637 }
13640 }
13644 {
13648 }
13650 /* Make injected friend class visible. */
13653 {
13658 {
13661 }
13662 }
13663 }
13666 }
13668 /* Wrapper for xref_tag_1. */
13670 tree
13673 {
13674 tree ret;
13680 }
13683 tree
13685 {
13690 else
13697 }
13699 /* Create the binfo hierarchy for REF with (possibly NULL) base list
13700 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
13701 access_* node, and the TREE_VALUE is the type of the base-class.
13702 Non-NULL TREE_TYPE indicates virtual inheritance. */
13704 void
13706 {
13713 tree default_access;
13719 /* The base of a derived class is private by default, all others are
13720 public. */
13725 /* First, make sure that any templates in base-classes are
13726 instantiated. This ensures that if we call ourselves recursively
13727 we do not get confused about which classes are marked and which
13728 are not. */
13731 {
13734 /* The dependent_type_p call below should really be dependent_scope_p
13735 so that we give a hard error about using an incomplete type as a
13736 base, but we allow it with a pedwarn for backward
13737 compatibility. */
13743 /* An incomplete type. Remove it from the list. */
13745 else
13746 {
13747 max_bases++;
13749 max_dvbases++;
13753 }
13754 }
13759 /* The binfo slot should be empty, unless this is an (ill-formed)
13760 redefinition. */
13771 /* Apply base-class info set up to the variants of this type. */
13775 {
13777 /* A C++98 POD cannot have base classes. */
13782 }
13789 {
13795 }
13798 {
13806 /* Before C++17, an aggregate cannot have base classes. In C++17, an
13807 aggregate can't have virtual, private, or protected base classes. */
13818 {
13820 basetype);
13822 }
13826 {
13828 /* The original basetype could have been a typedef'd type. */
13831 /* Inherit flags from the base. */
13842 }
13844 /* We must do this test after we've seen through a typedef
13845 type. */
13847 {
13850 else
13853 }
13856 /* Regenerate the pack expansion for the bases. */
13870 dropped_base:
13871 /* Update max_vbases to reflect the reality that we are dropping
13872 this base: if it reaches zero we want to undo the vec_alloc
13873 above to avoid inconsistencies during error-recovery: eg, in
13874 build_special_member_call, CLASSTYPE_VBASECLASSES non null
13875 and vtt null (c++/27952). */
13877 max_vbases--;
13879 max_vbases
13881 }
13888 /* If we didn't get max_vbases vbases, we must have shared at
13889 least one of them, and are therefore diamond shaped. */
13892 /* Unmark all the types. */
13897 /* Now see if we have a repeated base type. */
13899 {
13902 {
13904 {
13907 }
13909 }
13914 else
13916 }
13917 }
13919 \f
13920 /* Copies the enum-related properties from type SRC to type DST.
13921 Used with the underlying type of an enum and the enum itself. */
13922 static void
13924 {
13925 tree t;
13927 {
13937 else
13941 }
13942 }
13944 /* Begin compiling the definition of an enumeration type.
13945 NAME is its name,
13947 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
13949 UNDERLYING_TYPE is the type that will be used as the storage for
13950 the enumeration type. This should be NULL_TREE if no storage type
13951 was specified.
13953 ATTRIBUTES are any attributes specified after the enum-key.
13955 SCOPED_ENUM_P is true if this is a scoped enumeration type.
13957 if IS_NEW is not NULL, gets TRUE iff a new type is created.
13959 Returns the type object, as yet incomplete.
13960 Also records info about it so that build_enumerator
13961 may be used to declare the individual values as they are read. */
13963 tree
13966 {
13972 /* [C++0x dcl.enum]p5:
13974 If not explicitly specified, the underlying type of a scoped
13975 enumeration type is int. */
13982 /* If this is the real definition for a previous forward reference,
13983 fill in the contents in the same object that used to be the
13984 forward reference. */
13990 /* In case of a template_decl, the only check that should be deferred
13991 to instantiation time is the comparison of underlying types. */
13993 {
13995 {
14001 }
14003 {
14009 }
14015 {
14021 }
14022 }
14026 {
14027 /* In case of error, make a dummy enum to allow parsing to
14028 continue. */
14030 {
14033 }
14035 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
14036 of an opaque enum, or an opaque enum of an already defined
14037 enumeration (C++0x only).
14038 In any other case, it'll be NULL_TREE. */
14040 {
14043 }
14046 /* Do not push the decl more than once, unless we need to
14047 compare underlying types at instantiation time */
14050 || (underlying_type
14054 {
14057 }
14058 else
14065 /* The enum is considered opaque until the opening '{' of the
14066 enumerator list. */
14069 }
14076 {
14078 /* We already checked that it matches, don't change it to a different
14081 {
14084 }
14087 else
14090 }
14092 /* If into a template class, the returned enum is always the first
14093 declaration (opaque or not) seen. This way all the references to
14094 this type will be to the same declaration. The following ones are used
14095 only to check for definition errors. */
14098 else
14100 }
14102 /* After processing and defining all the values of an enumeration type,
14103 install their decls in the enumeration type.
14104 ENUMTYPE is the type object. */
14106 void
14108 {
14109 tree values;
14110 tree underlying_type;
14111 tree decl;
14112 tree value;
14114 tree t;
14116 bool fixed_underlying_type_p
14119 /* We built up the VALUES in reverse order. */
14122 /* For an enum defined in a template, just set the type of the values;
14123 all further processing is postponed until the template is
14124 instantiated. We need to set the type so that tsubst of a CONST_DECL
14125 works. */
14127 {
14129 values;
14133 }
14135 /* Determine the minimum and maximum values of the enumerators. */
14137 {
14141 values;
14143 {
14146 /* [dcl.enum]: Following the closing brace of an enum-specifier,
14147 each enumerator has the type of its enumeration. Prior to the
14148 closing brace, the type of each enumerator is the type of its
14149 initializing value. */
14152 /* Update the minimum and maximum values, if appropriate. */
14156 /* Figure out what the minimum and maximum values of the
14157 enumerators are. */
14164 }
14165 }
14166 else
14167 /* [dcl.enum]
14169 If the enumerator-list is empty, the underlying type is as if
14170 the enumeration had a single enumerator with value 0. */
14174 {
14175 /* Compute the number of bits require to represent all values of the
14176 enumeration. We must do this before the type of MINNODE and
14177 MAXNODE are transformed, since tree_int_cst_min_precision relies
14178 on the TREE_TYPE of the value it is passed. */
14186 /* Determine the underlying type of the enumeration.
14188 [dcl.enum]
14190 The underlying type of an enumeration is an integral type that
14191 can represent all the enumerator values defined in the
14192 enumeration. It is implementation-defined which integral type is
14193 used as the underlying type for an enumeration except that the
14194 underlying type shall not be larger than int unless the value of
14195 an enumerator cannot fit in an int or unsigned int.
14197 We use "int" or an "unsigned int" as the underlying type, even if
14198 a smaller integral type would work, unless the user has
14199 explicitly requested that we use the smallest possible type. The
14200 user can request that for all enumerations with a command line
14201 flag, or for just one enumeration with an attribute. */
14203 use_short_enum = flag_short_enums
14206 /* If the precision of the type was specified with an attribute and it
14207 was too small, give an error. Otherwise, use it. */
14209 {
14212 else
14213 {
14216 }
14217 }
14221 itk++)
14222 {
14228 }
14230 {
14231 /* DR 377
14233 IF no integral type can represent all the enumerator values, the
14234 enumeration is ill-formed. */
14239 }
14241 /* [dcl.enum]
14243 The value of sizeof() applied to an enumeration type, an object
14244 of an enumeration type, or an enumerator, is the value of sizeof()
14245 applied to the underlying type. */
14248 /* Compute the minimum and maximum values for the type.
14250 [dcl.enum]
14252 For an enumeration where emin is the smallest enumerator and emax
14253 is the largest, the values of the enumeration are the values of the
14254 underlying type in the range bmin to bmax, where bmin and bmax are,
14255 respectively, the smallest and largest values of the smallest bit-
14256 field that can store emin and emax. */
14258 /* The middle-end currently assumes that types with TYPE_PRECISION
14259 narrower than their underlying type are suitably zero or sign
14260 extended to fill their mode. Similarly, it assumes that the front
14261 end assures that a value of a particular type must be within
14262 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
14264 We used to set these fields based on bmin and bmax, but that led
14265 to invalid assumptions like optimizing away bounds checking. So
14266 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
14267 TYPE_MAX_VALUE to the values for the mode above and only restrict
14268 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
14272 set_min_and_max_values_for_integral_type
14275 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
14278 }
14279 else
14282 /* Convert each of the enumerators to the type of the underlying
14283 type of the enumeration. */
14285 {
14286 location_t saved_location;
14292 /* If the enumeration type has a fixed underlying type, we
14293 already checked all of the enumerator values. */
14295 else
14298 tf_warning_or_error);
14301 /* Do not clobber shared ints. */
14306 }
14308 /* Fix up all variant types of this enum type. */
14315 {
14317 current_class_type);
14319 }
14321 /* Finish debugging output for this type. */
14324 /* Each enumerator now has the type of its enumeration. Clear the cache
14325 so that this change in types doesn't confuse us later on. */
14327 }
14329 /* Finishes the enum type. This is called only the first time an
14330 enumeration is seen, be it opaque or odinary.
14331 ENUMTYPE is the type object. */
14333 void
14335 {
14337 {
14341 }
14343 /* If this is a forward declaration, there should not be any variants,
14344 though we can get a variant in the middle of an enum-specifier with
14345 wacky code like 'enum E { e = sizeof(const E*) };' */
14349 }
14351 /* Build and install a CONST_DECL for an enumeration constant of the
14352 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
14353 Apply ATTRIBUTES if available. LOC is the location of NAME.
14354 Assignment of sequential values by default is handled here. */
14356 void
14358 location_t loc)
14359 {
14360 tree decl;
14361 tree context;
14362 tree type;
14364 /* scalar_constant_value will pull out this expression, so make sure
14365 it's folded as appropriate. */
14369 /* If the VALUE was erroneous, pretend it wasn't there; that will
14370 result in the enum being assigned the next value in sequence. */
14374 /* Remove no-op casts from the value. */
14379 {
14380 /* Validate and default VALUE. */
14382 {
14384 {
14389 }
14392 value = perform_implicit_conversion_flags
14400 {
14403 {
14407 }
14408 else
14409 {
14413 {
14417 }
14418 }
14419 }
14420 }
14422 /* Default based on previous value. */
14424 {
14426 {
14427 tree prev_value;
14430 /* C++03 7.2/4: If no initializer is specified for the first
14431 enumerator, the type is an unspecified integral
14432 type. Otherwise the type is the same as the type of the
14433 initializing value of the preceding enumerator unless the
14434 incremented value is not representable in that type, in
14435 which case the type is an unspecified integral type
14436 sufficient to contain the incremented value. */
14440 else
14441 {
14447 {
14450 {
14453 {
14459 }
14465 }
14468 else
14470 }
14473 {
14476 }
14477 }
14478 }
14479 else
14481 }
14483 /* Remove no-op casts from the value. */
14486 /* If the underlying type of the enum is fixed, check whether
14487 the enumerator values fits in the underlying type. If it
14488 does not fit, the program is ill-formed [C++0x dcl.enum]. */
14490 && value
14492 {
14497 /* Convert the value to the appropriate type. */
14499 }
14500 }
14502 /* C++ associates enums with global, function, or class declarations. */
14505 /* Build the actual enumeration constant. Note that the enumeration
14506 constants have the underlying type of the enum (if it is fixed)
14507 or the type of their initializer (if the underlying type of the
14508 enum is not fixed):
14510 [ C++0x dcl.enum ]
14512 If the underlying type is fixed, the type of each enumerator
14513 prior to the closing brace is the underlying type; if the
14514 initializing value of an enumerator cannot be represented by
14515 the underlying type, the program is ill-formed. If the
14516 underlying type is not fixed, the type of each enumerator is
14517 the type of its initializing value.
14519 If the underlying type is not fixed, it will be computed by
14520 finish_enum and we will reset the type of this enumerator. Of
14521 course, if we're processing a template, there may be no value. */
14535 {
14536 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
14537 on the TYPE_FIELDS list for `S'. (That's so that you can say
14538 things like `S::i' later.) */
14540 /* The enumerator may be getting declared outside of its enclosing
14541 class, like so:
14543 class S { public: enum E : int; }; enum S::E : int { i = 7; };
14545 For which case we need to make sure that the access of `S::i'
14546 matches the access of `S::E'. */
14552 else
14558 }
14559 else
14562 /* Add this enumeration constant to the list for this type. */
14564 }
14566 /* Look for an enumerator with the given NAME within the enumeration
14567 type ENUMTYPE. This routine is used primarily for qualified name
14568 lookup into an enumerator in C++0x, e.g.,
14570 enum class Color { Red, Green, Blue };
14572 Color color = Color::Red;
14574 Returns the value corresponding to the enumerator, or
14575 NULL_TREE if no such enumerator was found. */
14576 tree
14578 {
14579 tree e;
14584 }
14586 \f
14587 /* We're defining DECL. Make sure that its type is OK. */
14589 static void
14591 {
14595 /* In a function definition, arg types must be complete. */
14602 {
14607 /* Make it return void instead. */
14610 void_type_node,
14612 else
14614 fntype
14617 fntype = (cp_build_type_attribute_variant
14620 }
14621 else
14623 }
14625 /* True iff FN is an implicitly-defined default constructor. */
14627 static bool
14629 {
14633 }
14635 /* Clobber the contents of *this to let the back end know that the object
14636 storage is dead when we enter the constructor or leave the destructor. */
14638 static tree
14640 {
14641 /* Clobbering an empty base is pointless, and harmful if its one byte
14642 TYPE_SIZE overlays real data. */
14646 /* If we have virtual bases, clobber the whole object, but only if we're in
14647 charge. If we don't have virtual bases, clobber the as-base type so we
14648 don't mess with tail padding. */
14660 {
14663 }
14670 }
14672 /* Create the FUNCTION_DECL for a function definition.
14673 DECLSPECS and DECLARATOR are the parts of the declaration;
14674 they describe the function's name and the type it returns,
14675 but twisted together in a fashion that parallels the syntax of C.
14677 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
14678 DECLARATOR is really the DECL for the function we are about to
14679 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
14680 indicating that the function is an inline defined in-class.
14682 This function creates a binding context for the function body
14683 as well as setting up the FUNCTION_DECL in current_function_decl.
14685 For C++, we must first check whether that datum makes any sense.
14686 For example, "class A local_a(1,2);" means that variable local_a
14687 is an aggregate of type A, which should have a constructor
14688 applied to it with the argument list [1, 2].
14690 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
14691 or may be a BLOCK if the function has been defined previously
14692 in this translation unit. On exit, DECL_INITIAL (decl1) will be
14693 error_mark_node if the function has never been defined, or
14694 a BLOCK if the function has been defined somewhere. */
14696 bool
14698 {
14700 tree fntype;
14701 tree restype;
14704 tree current_function_parms;
14709 /* Sanity check. */
14717 /* ISO C++ 11.4/5. A friend function defined in a class is in
14718 the (lexical) scope of the class in which it is defined. */
14720 {
14723 /* CTYPE could be null here if we're dealing with a template;
14724 for example, `inline friend float foo()' inside a template
14725 will have no CTYPE set. */
14728 else
14730 }
14737 /* Handle gnu_inline attribute. */
14739 {
14744 }
14747 /* This is a constructor, we must ensure that any default args
14748 introduced by this definition are propagated to the clones
14749 now. The clones are used directly in overload resolution. */
14752 /* Sometimes we don't notice that a function is a static member, and
14753 build a METHOD_TYPE for it. Fix that up now. */
14757 /* Set up current_class_type, and enter the scope of the class, if
14758 appropriate. */
14764 /* Now that we have entered the scope of the class, we must restore
14765 the bindings for any template parameters surrounding DECL1, if it
14766 is an inline member template. (Order is important; consider the
14767 case where a template parameter has the same name as a field of
14768 the class.) It is not until after this point that
14769 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
14773 /* Effective C++ rule 15. */
14779 /* Make the init_value nonzero so pushdecl knows this is not tentative.
14780 error_mark_node is replaced below (in poplevel) with the BLOCK. */
14784 /* This function exists in static storage.
14785 (This does not mean `static' in the C sense!) */
14788 /* We must call push_template_decl after current_class_type is set
14789 up. (If we are processing inline definitions after exiting a
14790 class scope, current_class_type will be NULL_TREE until set above
14791 by push_nested_class.) */
14793 {
14796 {
14800 }
14802 }
14804 /* We are now in the scope of the function being defined. */
14807 /* Save the parm names or decls from this function's declarator
14808 where store_parm_decls will find them. */
14811 /* Make sure the parameter and return types are reasonable. When
14812 you declare a function, these types can be incomplete, but they
14813 must be complete when you define the function. */
14816 /* Build the return declaration for the function. */
14820 {
14821 tree resdecl;
14829 }
14831 /* Let the user know we're compiling this function. */
14834 /* Record the decl so that the function name is defined.
14835 If we already have a decl for this name, and it is a FUNCTION_DECL,
14836 use the old decl. */
14838 {
14839 /* A specialization is not used to guide overload resolution. */
14843 {
14847 /* If something went wrong when registering the declaration,
14848 use DECL1; we have to have a FUNCTION_DECL to use when
14849 parsing the body of the function. */
14850 ;
14851 else
14852 {
14853 /* Otherwise, OLDDECL is either a previous declaration
14854 of the same function or DECL1 itself. */
14861 {
14862 tree context;
14864 /* Check whether DECL1 is in an anonymous
14865 namespace. */
14867 context;
14869 {
14873 }
14877 OPT_Wmissing_declarations,
14879 }
14882 }
14883 }
14884 else
14885 {
14886 /* We need to set the DECL_CONTEXT. */
14889 }
14893 /* If #pragma weak applies, mark the decl appropriately now.
14894 The pragma only applies to global functions. Because
14895 determining whether or not the #pragma applies involves
14896 computing the mangled name for the declaration, we cannot
14897 apply the pragma until after we have merged this declaration
14898 with any previous declarations; if the original declaration
14899 has a linkage specification, that specification applies to
14900 the definition as well, and may affect the mangled name. */
14903 }
14905 /* Reset this in case the call to pushdecl changed it. */
14910 /* This function may already have been parsed, in which case just
14911 return; our caller will skip over the body without parsing. */
14915 /* Initialize RTL machinery. We cannot do this until
14916 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
14917 even when processing a template; this is how we get
14918 CFUN set up, and our per-function variables initialized.
14919 FIXME factor out the non-RTL stuff. */
14923 /* Initialize the language data structures. Whenever we start
14924 a new function, we destroy temporaries in the usual way. */
14930 {
14933 }
14935 /* Start the statement-tree, start the tree now. */
14938 /* If we are (erroneously) defining a function that we have already
14939 defined before, wipe out what we knew before. */
14944 {
14945 /* We know that this was set up by `grokclassfn'. We do not
14946 wait until `store_parm_decls', since evil parse errors may
14947 never get us to that point. Here we keep the consistency
14948 between `current_class_type' and `current_class_ptr'. */
14954 cp_function_chain->x_current_class_ref
14956 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
14959 /* Constructors and destructors need to know whether they're "in
14960 charge" of initializing virtual base classes. */
14963 {
14966 }
14968 {
14971 }
14972 }
14975 /* Implicitly-defined methods (like the
14976 destructor for a class in which no destructor
14977 is explicitly declared) must not be defined
14978 until their definition is needed. So, we
14979 ignore interface specifications for
14980 compiler-generated functions. */
14986 {
14993 /* This is a function in a local class in an extern inline
14994 or template function. */
14996 }
14997 /* If this function belongs to an interface, it is public.
14998 If it belongs to someone else's interface, it is also external.
14999 This only affects inlines and template instantiations. */
15001 {
15004 {
15008 && ! flag_implement_inlines
15011 /* For WIN32 we also want to put these in linkonce sections. */
15013 }
15014 else
15017 /* If this function is in an interface implemented in this file,
15018 make sure that the back end knows to emit this function
15019 here. */
15022 }
15025 {
15026 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
15027 interface, we will have both finfo->interface_unknown and
15028 finfo->interface_only set. In that case, we don't want to
15029 use the normal heuristics because someone will supply a
15030 #pragma implementation elsewhere, and deducing it here would
15031 produce a conflict. */
15036 }
15037 else
15038 {
15039 /* This is a definition, not a reference.
15040 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
15048 else
15050 }
15052 /* Determine the ELF visibility attribute for the function. We must not
15053 do this before calling "pushdecl", as we must allow "duplicate_decls"
15054 to merge any attributes appropriately. We also need to wait until
15055 linkage is set. */
15079 /* Clobbering an empty base is harmful if it overlays real data. */
15081 /* We can't clobber safely for an implicitly-defined default constructor
15082 because part of the initialization might happen before we enter the
15083 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
15095 }
15098 /* Like start_preparsed_function, except that instead of a
15099 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
15101 Returns true on success. If the DECLARATOR is not suitable
15102 for a function, we return false, which tells the parser to
15103 skip the entire function. */
15105 bool
15108 tree attrs)
15109 {
15110 tree decl1;
15116 /* If the declarator is not suitable for a function definition,
15117 cause a syntax error. */
15119 {
15122 }
15125 /* main must return int. grokfndecl should have corrected it
15126 (and issued a diagnostic) if the user got it wrong. */
15128 integer_type_node));
15131 }
15132 \f
15133 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
15134 FN. */
15136 static bool
15138 {
15140 && !processing_template_decl
15142 /* We insert the EH_SPEC_BLOCK only in the original
15143 function; then, it is copied automatically to the
15144 clones. */
15146 /* Implicitly-generated constructors and destructors have
15147 exception specifications. However, those specifications
15148 are the union of the possible exceptions specified by the
15149 constructors/destructors for bases and members, so no
15150 unallowed exception will ever reach this function. By
15151 not creating the EH_SPEC_BLOCK we save a little memory,
15152 and we avoid spurious warnings about unreachable
15153 code. */
15155 }
15157 /* Store the parameter declarations into the current function declaration.
15158 This is called after parsing the parameter declarations, before
15159 digesting the body of the function.
15161 Also install to binding contour return value identifier, if any. */
15163 static void
15165 {
15167 tree parm;
15169 /* This is a chain of any other decls that came in among the parm
15170 declarations. If a parm is declared with enum {foo, bar} x;
15171 then CONST_DECLs for foo and bar are put here. */
15175 {
15176 /* This case is when the function was defined with an ANSI prototype.
15177 The parms already have decls, so we need not do anything here
15178 except record them as in effect
15179 and complain if any redundant old-style parm decls were written. */
15182 tree next;
15184 /* Must clear this because it might contain TYPE_DECLs declared
15185 at class level. */
15188 /* If we're doing semantic analysis, then we'll call pushdecl
15189 for each of these. We must do them in reverse order so that
15190 they end in the correct forward order. */
15194 {
15198 else
15199 {
15200 /* If we find an enum constant or a type tag,
15201 put it aside for the moment. */
15204 }
15205 }
15207 /* Get the decls in their original chain order and record in the
15208 function. This is all and only the PARM_DECLs that were
15209 pushed into scope by the loop above. */
15211 }
15212 else
15215 /* Now store the final chain of decls for the arguments
15216 as the decl-chain of the current lexical scope.
15217 Put the enumerators in as well, at the front so that
15218 DECL_ARGUMENTS is not modified. */
15223 }
15225 \f
15226 /* We have finished doing semantic analysis on DECL, but have not yet
15227 generated RTL for its body. Save away our current state, so that
15228 when we want to generate RTL later we know what to do. */
15230 static void
15232 {
15235 /* Save the language-specific per-function data so that we can
15236 get it back when we really expand this function. */
15239 /* Make a copy. */
15244 /* Clear out the bits we don't need. */
15249 }
15252 /* Set the return value of the constructor (if present). */
15254 static void
15256 {
15257 tree val;
15258 tree exprstmt;
15261 {
15262 /* Any return from a constructor will end up here. */
15268 /* Return the address of the object. */
15271 }
15272 }
15274 /* Do all the processing for the beginning of a destructor; set up the
15275 vtable pointers and cleanups for bases and members. */
15277 static void
15279 {
15280 tree compound_stmt;
15282 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
15283 issued an error message. We still want to try to process the
15284 body of the function, but initialize_vtbl_ptrs will crash if
15285 TYPE_BINFO is NULL. */
15287 {
15289 /* Make all virtual function table pointers in non-virtual base
15290 classes point to CURRENT_CLASS_TYPE's virtual function
15291 tables. */
15296 /* Clobbering an empty base is harmful if it overlays real data. */
15300 /* And insert cleanups for our bases and members so that they
15301 will be properly destroyed if we throw. */
15303 }
15304 }
15306 /* At the end of every destructor we generate code to delete the object if
15307 necessary. Do that now. */
15309 static void
15311 {
15312 tree exprstmt;
15314 /* Any return from a destructor will end up here; that way all base
15315 and member cleanups will be run when the function returns. */
15319 {
15320 tree val;
15325 /* Return the address of the object. */
15328 }
15329 }
15331 /* Do the necessary processing for the beginning of a function body, which
15332 in this case includes member-initializers, but not the catch clauses of
15333 a function-try-block. Currently, this means opening a binding level
15334 for the member-initializers (in a ctor), member cleanups (in a dtor),
15335 and capture proxies (in a lambda operator()). */
15337 tree
15339 {
15340 tree stmt;
15347 else
15348 /* Always keep the BLOCK node associated with the outermost pair of
15349 curly braces of a function. These are needed for correct
15350 operation of dwarfout.c. */
15361 }
15363 /* Do the processing for the end of a function body. Currently, this means
15364 closing out the cleanups for fully-constructed bases and members, and in
15365 the case of the destructor, deleting the object if desired. Again, this
15366 is only meaningful for [cd]tors, since they are the only functions where
15367 there is a significant distinction between the main body and any
15368 function catch clauses. Handling, say, main() return semantics here
15369 would be wrong, as flowing off the end of a function catch clause for
15370 main() would also need to return 0. */
15372 void
15374 {
15378 /* Close the block. */
15387 }
15389 /* Given a function, returns the BLOCK corresponding to the outermost level
15390 of curly braces, skipping the artificial block created for constructor
15391 initializers. */
15393 tree
15395 {
15405 }
15407 /* If FNDECL is a class's key method, add the class to the list of
15408 keyed classes that should be emitted. */
15410 static void
15412 {
15416 {
15420 }
15421 }
15423 /* Subroutine of finish_function.
15424 Save the body of constexpr functions for possible
15425 future compile time evaluation. */
15427 static void
15429 {
15435 }
15437 /* Finish up a function declaration and compile that function
15438 all the way to assembler language output. The free the storage
15439 for the function definition.
15441 FLAGS is a bitwise or of the following values:
15442 2 - INCLASS_INLINE
15443 We just finished processing the body of an in-class inline
15444 function definition. (This processing will have taken place
15445 after the class definition is complete.) */
15447 tree
15449 {
15454 /* When we get some parse errors, we can end up without a
15455 current_function_decl, so cope. */
15466 /* TREE_READONLY (fndecl) = 1;
15467 This caused &foo to be of type ptr-to-const-function
15468 which then got a warning when stored in a ptr-to-function variable. */
15471 /* The current function is being defined, so its DECL_INITIAL should
15472 be set, and unless there's a multiple definition, it should be
15473 error_mark_node. */
15476 /* For a cloned function, we've already got all the code we need;
15477 there's no need to add any extra bits. */
15479 {
15480 /* Make it so that `main' always returns 0 by default. */
15487 current_eh_spec_block);
15488 }
15490 /* If we're saving up tree structure, tie off the function now. */
15498 /* If this function can't throw any exceptions, remember that. */
15501 && !flag_non_call_exceptions
15505 /* This must come after expand_function_end because cleanups might
15506 have declarations (from inline functions) that need to go into
15507 this function's blocks. */
15509 /* If the current binding level isn't the outermost binding level
15510 for this function, either there is a bug, or we have experienced
15511 syntax errors and the statement tree is malformed. */
15513 {
15514 /* Make sure we have already experienced errors. */
15517 /* Throw away the broken statement tree and extra binding
15518 levels. */
15522 {
15525 else
15527 }
15528 }
15531 /* Statements should always be full-expressions at the outermost set
15532 of curly braces for a function. */
15535 /* If there are no return statements in a function with auto return type,
15536 the return type is void. But if the declared type is something like
15537 auto*, this is an error. */
15540 {
15543 {
15545 current_function_auto_return_pattern);
15548 }
15551 }
15553 // If this is a concept, check that the definition is reasonable.
15557 /* Lambda closure members are implicitly constexpr if possible. */
15560 && (processing_template_decl
15565 /* Save constexpr function body before it gets munged by
15566 the NRV transformation. */
15569 /* Invoke the pre-genericize plugin before we start munging things. */
15573 /* Perform delayed folding before NRV transformation. */
15577 /* Set up the named return value optimization, if we can. Candidate
15578 variables are selected in check_return_expr. */
15580 {
15582 tree outer;
15585 /* This is only worth doing for fns that return in memory--and
15586 simpler, since we don't have to worry about promoted modes. */
15588 /* Only allow this for variables declared in the outer scope of
15589 the function so we know that their lifetime always ends with a
15590 return; see g++.dg/opt/nrv6.C. We could be more flexible if
15591 we were to do this optimization in tree-ssa. */
15597 }
15599 /* Remember that we were in class scope. */
15603 /* Must mark the RESULT_DECL as being in this function. */
15606 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
15607 to the FUNCTION_DECL node itself. */
15610 /* Save away current state, if appropriate. */
15614 /* Complain if there's just no return statement. */
15619 /* Don't complain if we abort or throw. */
15620 && !current_function_returns_abnormally
15621 /* Don't complain if there's an infinite loop. */
15622 && !current_function_infinite_loop
15623 /* Don't complain if we are declared noreturn. */
15627 /* Structor return values (if any) are set by the compiler. */
15631 {
15635 }
15637 /* Store the end of the function, so that we get good line number
15638 info for the epilogue. */
15641 /* Complain about parameters that are only set, but never otherwise used. */
15643 && !processing_template_decl
15646 {
15647 tree decl;
15650 decl;
15664 OPT_Wunused_but_set_parameter,
15667 }
15669 /* Complain about locally defined typedefs that are not used in this
15670 function. */
15673 /* Possibly warn about unused parameters. */
15675 && !processing_template_decl
15679 /* Genericize before inlining. */
15681 {
15684 /* Clear out the bits we don't need. */
15694 }
15695 /* Clear out the bits we don't need. */
15698 /* We're leaving the context of this function, so zap cfun. It's still in
15699 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
15703 /* If this is an in-class inline definition, we may have to pop the
15704 bindings for the template parameters that we added in
15705 maybe_begin_member_template_processing when start_function was
15706 called. */
15710 /* Leave the scope of the class. */
15716 /* Clean up. */
15721 }
15722 \f
15723 /* Create the FUNCTION_DECL for a function definition.
15724 DECLSPECS and DECLARATOR are the parts of the declaration;
15725 they describe the return type and the name of the function,
15726 but twisted together in a fashion that parallels the syntax of C.
15728 This function creates a binding context for the function body
15729 as well as setting up the FUNCTION_DECL in current_function_decl.
15731 Returns a FUNCTION_DECL on success.
15733 If the DECLARATOR is not suitable for a function (it defines a datum
15734 instead), we return 0, which tells yyparse to report a parse error.
15736 May return void_type_node indicating that this method is actually
15737 a friend. See grokfield for more details.
15739 Came here with a `.pushlevel' .
15741 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
15742 CHANGES TO CODE IN `grokfield'. */
15744 tree
15747 {
15755 {
15758 }
15763 /* Pass friends other than inline friend functions back. */
15768 {
15773 }
15782 /* We process method specializations in finish_struct_1. */
15784 {
15788 }
15791 {
15793 {
15796 }
15797 }
15803 }
15804 \f
15806 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
15807 we can lay it out later, when and if its type becomes complete.
15809 Also handle constexpr variables where the initializer involves
15810 an unlowered PTRMEM_CST because the class isn't complete yet. */
15812 void
15814 {
15817 /* Keep track of variables with incomplete types. */
15820 {
15828 /* RTTI TD entries are created while defining the type_info. */
15831 {
15834 }
15838 {
15839 /* When the outermost open class is complete we can resolve any
15840 pointers-to-members. */
15844 }
15845 }
15846 }
15848 /* Called when a class type (given by TYPE) is defined. If there are
15849 any existing VAR_DECLs whose type has been completed by this
15850 declaration, update them now. */
15852 void
15854 {
15859 {
15861 {
15868 {
15869 /* Complete the type of the variable. The VAR_DECL itself
15870 will be laid out in expand_expr. */
15873 }
15875 /* Remove this entry from the list. */
15877 }
15878 else
15879 ix++;
15880 }
15882 /* Check for pending declarations which may have abstract type. */
15884 }
15886 /* If DECL is of a type which needs a cleanup, build and return an
15887 expression to perform that cleanup here. Return NULL_TREE if no
15888 cleanup need be done. DECL can also be a _REF when called from
15889 split_nonconstant_init_1. */
15891 tree
15893 {
15894 tree type;
15895 tree attr;
15896 tree cleanup;
15898 /* Assume no cleanup is required. */
15904 /* Handle "__attribute__((cleanup))". We run the cleanup function
15905 before the destructor since the destructor is what actually
15906 terminates the lifetime of the object. */
15909 else
15912 {
15913 tree id;
15914 tree fn;
15915 tree arg;
15917 /* Get the name specified by the user for the cleanup function. */
15919 /* Look up the name to find the cleanup function to call. It is
15920 important to use lookup_name here because that is what is
15921 used in c-common.c:handle_cleanup_attribute when performing
15922 initial checks on the attribute. Note that those checks
15923 include ensuring that the function found is not an overloaded
15924 function, or an object with an overloaded call operator,
15925 etc.; we can rely on the fact that the function found is an
15926 ordinary FUNCTION_DECL. */
15934 }
15935 /* Handle ordinary C++ destructors. */
15938 {
15940 tree addr;
15941 tree call;
15945 else
15956 else
15958 }
15960 /* build_delete sets the location of the destructor call to the
15961 current location, even though the destructor is going to be
15962 called later, at the end of the current scope. This can lead to
15963 a "jumpy" behavior for users of debuggers when they step around
15964 the end of the block. So let's unset the location of the
15965 destructor call instead. */
15971 /* Treat objects with destructors as used; the destructor may do
15972 something substantive. */
15977 }
15979 \f
15980 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
15981 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
15982 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
15984 tree
15986 {
15987 tree fntype;
15988 tree args;
16002 fntype = (cp_build_type_attribute_variant
16004 fntype = (build_exception_variant
16009 }
16011 /* DECL was originally constructed as a non-static member function,
16012 but turned out to be static. Update it accordingly. */
16014 void
16016 {
16029 }
16031 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
16032 one of the language-independent trees. */
16034 enum cp_tree_node_structure_enum
16036 {
16038 {
16055 }
16056 }
16058 /* Build the void_list_node (void_type_node having been created). */
16059 tree
16061 {
16064 }
16066 bool
16068 {
16069 /* A missing noreturn is ok for the `main' function. */
16071 }
16073 /* Return the decl used to identify the COMDAT group into which DECL should
16074 be placed. */
16076 tree
16078 {
16079 /* Virtual tables, construction virtual tables, and virtual table
16080 tables all go in a single COMDAT group, named after the primary
16081 virtual table. */
16084 /* For all other DECLs, the COMDAT group is the mangled name of the
16085 declaration itself. */
16086 else
16087 {
16089 {
16090 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
16091 into the same section as the target function. In that case
16092 we must return target's name. */
16098 else
16100 }
16101 }
16104 }
16106 /* Returns the return type for FN as written by the user, which may include
16107 a placeholder for a deduced return type. */
16109 tree
16111 {
16114 {
16121 }
16123 }
16125 /* Returns true iff DECL was declared with an auto return type and it has
16126 not yet been deduced to a real type. */
16128 bool
16130 {
16134 }
16136 /* Complain if DECL has an undeduced return type. */
16138 void
16140 {
16143 }