1 /* Process declarations and variables for C compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
4 Hacked by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
44 #include "dwarf2out.h"
51 extern cpp_reader parse_in
;
54 /* This structure contains information about the initializations
55 and/or destructions required for a particular priority level. */
56 typedef struct priority_info_s
{
57 /* Non-zero if there have been any initializations at this priority
58 throughout the translation unit. */
59 int initializations_p
;
60 /* Non-zero if there have been any destructions at this priority
61 throughout the translation unit. */
65 static tree get_sentry
PARAMS ((tree
));
66 static void mark_vtable_entries
PARAMS ((tree
));
67 static void grok_function_init
PARAMS ((tree
, tree
));
68 static int finish_vtable_vardecl
PARAMS ((tree
*, void *));
69 static int prune_vtable_vardecl
PARAMS ((tree
*, void *));
70 static int is_namespace_ancestor
PARAMS ((tree
, tree
));
71 static void add_using_namespace
PARAMS ((tree
, tree
, int));
72 static tree ambiguous_decl
PARAMS ((tree
, tree
, tree
,int));
73 static tree build_anon_union_vars
PARAMS ((tree
, tree
*, int, int));
74 static int acceptable_java_type
PARAMS ((tree
));
75 static void output_vtable_inherit
PARAMS ((tree
));
76 static tree start_objects
PARAMS ((int, int));
77 static void finish_objects
PARAMS ((int, int, tree
));
78 static tree merge_functions
PARAMS ((tree
, tree
));
79 static tree decl_namespace
PARAMS ((tree
));
80 static tree validate_nonmember_using_decl
PARAMS ((tree
, tree
*, tree
*));
81 static void do_nonmember_using_decl
PARAMS ((tree
, tree
, tree
, tree
,
83 static tree start_static_storage_duration_function
PARAMS ((void));
84 static void finish_static_storage_duration_function
PARAMS ((tree
));
85 static priority_info get_priority_info
PARAMS ((int));
86 static void do_static_initialization
PARAMS ((tree
, tree
));
87 static void do_static_destruction
PARAMS ((tree
));
88 static tree start_static_initialization_or_destruction
PARAMS ((tree
, int));
89 static void finish_static_initialization_or_destruction
PARAMS ((tree
));
90 static void generate_ctor_or_dtor_function
PARAMS ((int, int));
91 static int generate_ctor_and_dtor_functions_for_priority
92 PARAMS ((splay_tree_node
, void *));
93 static tree prune_vars_needing_no_initialization
PARAMS ((tree
));
94 static void write_out_vars
PARAMS ((tree
));
95 static void import_export_class
PARAMS ((tree
));
96 static tree key_method
PARAMS ((tree
));
97 static int compare_options
PARAMS ((const PTR
, const PTR
));
99 extern int current_class_depth
;
101 /* A list of virtual function tables we must make sure to write out. */
102 tree pending_vtables
;
104 /* A list of static class variables. This is needed, because a
105 static class variable can be declared inside the class without
106 an initializer, and then initialized, staticly, outside the class. */
107 static varray_type pending_statics
;
108 #define pending_statics_used \
109 (pending_statics ? pending_statics->elements_used : 0)
111 /* A list of functions which were declared inline, but which we
112 may need to emit outline anyway. */
113 static varray_type deferred_fns
;
114 #define deferred_fns_used \
115 (deferred_fns ? deferred_fns->elements_used : 0)
117 /* Same, but not reset. Local temp variables and global temp variables
118 can have the same name. */
119 static int global_temp_name_counter
;
121 /* Flag used when debugging spew.c */
123 extern int spew_debug
;
125 /* Nonzero if we're done parsing and into end-of-file activities. */
129 /* Functions called along with real static constructors and destructors. */
131 tree static_ctors
, static_dtors
;
133 /* The :: namespace. */
135 tree global_namespace
;
137 /* The stack for namespaces of current declarations. */
139 static tree decl_namespace_list
;
142 /* C (and C++) language-specific option variables. */
144 /* Nonzero means allow type mismatches in conditional expressions;
145 just make their values `void'. */
147 int flag_cond_mismatch
;
149 /* Nonzero means give `double' the same size as `float'. */
151 int flag_short_double
;
153 /* Nonzero means don't recognize the keyword `asm'. */
157 /* Nonzero means don't recognize any extension keywords. */
159 int flag_no_gnu_keywords
;
161 /* Nonzero means don't recognize the non-ANSI builtin functions. */
165 /* Nonzero means don't recognize the non-ANSI builtin functions.
168 int flag_no_nonansi_builtin
;
170 /* Nonzero means do some things the same way PCC does. Only provided so
171 the compiler will link. */
173 int flag_traditional
;
175 /* Nonzero means to treat bitfields as unsigned unless they say `signed'. */
177 int flag_signed_bitfields
= 1;
179 /* Nonzero means enable obscure standard features and disable GNU
180 extensions that might cause standard-compliant code to be
185 /* Nonzero means do emit exported implementations of functions even if
186 they can be inlined. */
188 int flag_implement_inlines
= 1;
190 /* Nonzero means do emit exported implementations of templates, instead of
191 multiple static copies in each file that needs a definition. */
193 int flag_external_templates
;
195 /* Nonzero means that the decision to emit or not emit the implementation of a
196 template depends on where the template is instantiated, rather than where
199 int flag_alt_external_templates
;
201 /* Nonzero means that implicit instantiations will be emitted if needed. */
203 int flag_implicit_templates
= 1;
205 /* Nonzero means that implicit instantiations of inline templates will be
206 emitted if needed, even if instantiations of non-inline templates
209 int flag_implicit_inline_templates
= 1;
211 /* Nonzero means warn about implicit declarations. */
213 int warn_implicit
= 1;
215 /* Nonzero means warn about usage of long long when `-pedantic'. */
217 int warn_long_long
= 1;
219 /* Nonzero means warn when all ctors or dtors are private, and the class
222 int warn_ctor_dtor_privacy
= 1;
224 /* True if we want to implement vtables using "thunks".
225 The default is off. */
227 #ifndef DEFAULT_VTABLE_THUNKS
228 #define DEFAULT_VTABLE_THUNKS 0
230 int flag_vtable_thunks
= DEFAULT_VTABLE_THUNKS
;
232 /* Nonzero means generate separate instantiation control files and juggle
233 them at link time. */
235 int flag_use_repository
;
237 /* Nonzero if we want to issue diagnostics that the standard says are not
240 int flag_optional_diags
= 1;
242 /* Nonzero means give string constants the type `const char *', as mandated
245 int flag_const_strings
= 1;
247 /* If non-NULL, dump the tree structure for the entire translation
248 unit to this file. */
250 const char *flag_dump_translation_unit
= 0;
252 /* Nonzero means warn about deprecated conversion from string constant to
255 int warn_write_strings
;
257 /* Nonzero means warn about pointer casts that can drop a type qualifier
258 from the pointer target type. */
262 /* Nonzero means warn about sizeof(function) or addition/subtraction
263 of function pointers. */
265 int warn_pointer_arith
= 1;
267 /* Nonzero means warn for any function def without prototype decl. */
269 int warn_missing_prototypes
;
271 /* Nonzero means warn about multiple (redundant) decls for the same single
272 variable or function. */
274 int warn_redundant_decls
;
276 /* Warn if initializer is not completely bracketed. */
278 int warn_missing_braces
;
280 /* Warn about comparison of signed and unsigned values. */
282 int warn_sign_compare
;
284 /* Warn about testing equality of floating point numbers. */
286 int warn_float_equal
= 0;
288 /* Warn about *printf or *scanf format/argument anomalies. */
292 /* Warn about a subscript that has type char. */
294 int warn_char_subscripts
;
296 /* Warn if a type conversion is done that might have confusing results. */
300 /* Warn if adding () is suggested. */
302 int warn_parentheses
;
304 /* Non-zero means warn in function declared in derived class has the
305 same name as a virtual in the base class, but fails to match the
306 type signature of any virtual function in the base class. */
307 int warn_overloaded_virtual
;
309 /* Non-zero means warn when declaring a class that has a non virtual
310 destructor, when it really ought to have a virtual one. */
313 /* Non-zero means warn when a function is declared extern and later inline. */
314 int warn_extern_inline
;
316 /* Non-zero means warn when the compiler will reorder code. */
319 /* Non-zero means warn when synthesis behavior differs from Cfront's. */
322 /* Non-zero means warn when we convert a pointer to member function
323 into a pointer to (void or function). */
324 int warn_pmf2ptr
= 1;
326 /* Nonzero means warn about violation of some Effective C++ style rules. */
330 /* Nonzero means warn where overload resolution chooses a promotion from
331 unsigned to signed over a conversion to an unsigned of the same size. */
335 /* Nonzero means warn when an old-style cast is used. */
337 int warn_old_style_cast
;
339 /* Warn about #pragma directives that are not recognised. */
341 int warn_unknown_pragmas
; /* Tri state variable. */
343 /* Nonzero means warn about use of multicharacter literals. */
345 int warn_multichar
= 1;
347 /* Nonzero means warn when non-templatized friend functions are
348 declared within a template */
350 int warn_nontemplate_friend
= 1;
352 /* Nonzero means complain about deprecated features. */
354 int warn_deprecated
= 1;
356 /* Nonzero means `$' can be in an identifier. */
358 #ifndef DOLLARS_IN_IDENTIFIERS
359 #define DOLLARS_IN_IDENTIFIERS 1
361 int dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
;
363 /* Nonzero for -fno-strict-prototype switch: do not consider empty
364 argument prototype to mean function takes no arguments. */
366 int flag_strict_prototype
= 2;
367 int strict_prototype
= 1;
368 int strict_prototypes_lang_c
, strict_prototypes_lang_cplusplus
= 1;
370 /* Nonzero means that labels can be used as first-class objects */
374 /* Nonzero means allow Microsoft extensions without a pedwarn. */
376 int flag_ms_extensions
;
378 /* Non-zero means to collect statistics which might be expensive
379 and to print them when we are done. */
380 int flag_detailed_statistics
;
382 /* C++ specific flags. */
383 /* Zero means that `this' is a *const. This gives nice behavior in the
384 2.0 world. 1 gives 1.2-compatible behavior. 2 gives Spring behavior.
385 -2 means we're constructing an object and it has fixed type. */
387 int flag_this_is_variable
;
389 /* Nonzero means we should attempt to elide constructors when possible. */
391 int flag_elide_constructors
= 1;
393 /* Nonzero means that member functions defined in class scope are
394 inline by default. */
396 int flag_default_inline
= 1;
398 /* Controls whether compiler generates 'type descriptor' that give
399 run-time type information. */
402 /* Nonzero if we wish to output cross-referencing information
403 for the GNU class browser. */
404 extern int flag_gnu_xref
;
406 /* Nonzero if we want to support huge (> 2^(sizeof(short)*8-1) bytes)
409 int flag_huge_objects
;
411 /* Nonzero if we want to conserve space in the .o files. We do this
412 by putting uninitialized data and runtime initialized data into
413 .common instead of .data at the expense of not flagging multiple
416 int flag_conserve_space
;
418 /* Nonzero if we want to obey access control semantics. */
420 int flag_access_control
= 1;
422 /* Nonzero if we want to understand the operator names, i.e. 'bitand'. */
424 int flag_operator_names
= 1;
426 /* Nonzero if we want to check the return value of new and avoid calling
427 constructors if it is a null pointer. */
431 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
432 initialization variables.
433 0: Old rules, set by -fno-for-scope.
434 2: New ISO rules, set by -ffor-scope.
435 1: Try to implement new ISO rules, but with backup compatibility
436 (and warnings). This is the default, for now. */
438 int flag_new_for_scope
= 1;
440 /* Nonzero if we want to emit defined symbols with common-like linkage as
441 weak symbols where possible, in order to conform to C++ semantics.
442 Otherwise, emit them as local symbols. */
446 /* Nonzero to enable experimental ABI changes. */
450 /* Nonzero to use __cxa_atexit, rather than atexit, to register
451 destructors for local statics and global objects. */
453 int flag_use_cxa_atexit
;
455 /* Nonzero to not ignore namespace std. */
457 int flag_honor_std
= ENABLE_STD_NAMESPACE
;
459 /* Nonzero if we should expand functions calls inline at the tree
460 level, rather than at the RTL level. */
462 int flag_inline_trees
= 0;
464 /* Maximum template instantiation depth. Must be at least 17 for ISO
467 int max_tinst_depth
= 17;
469 /* The name-mangling scheme to use. Must be 1 or greater to support
470 template functions with identical types, but different template
472 int name_mangling_version
= 2;
474 /* Nonzero if wchar_t should be `unsigned short' instead of whatever it
475 would normally be, for use with WINE. */
476 int flag_short_wchar
;
478 /* Nonzero if squashed mangling is to be performed.
479 This uses the B and K codes to reference previously seen class types
480 and class qualifiers. */
481 int flag_do_squangling
;
483 /* Nonzero means output .vtable_{entry,inherit} for use in doing vtable gc. */
487 /* Nonzero means make the default pedwarns warnings instead of errors.
488 The value of this flag is ignored if -pedantic is specified. */
492 /* Nonzero means to implement standard semantics for exception
493 specifications, calling unexpected if an exception is thrown that
494 doesn't match the specification. Zero means to treat them as
495 assertions and optimize accordingly, but not check them. */
497 int flag_enforce_eh_specs
= 1;
499 /* If this variable is defined to a non-NULL value, it will be called
500 after the file has been completely parsed. */
502 void (*back_end_hook
) PARAMS ((tree
));
504 /* The variant of the C language being processed. */
506 c_language_kind c_language
= clk_cplusplus
;
508 /* Table of language-dependent -f options.
509 STRING is the option name. VARIABLE is the address of the variable.
510 ON_VALUE is the value to store in VARIABLE
511 if `-fSTRING' is seen as an option.
512 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
514 static struct { const char *string
; int *variable
; int on_value
;}
518 {"signed-char", &flag_signed_char
, 1},
519 {"unsigned-char", &flag_signed_char
, 0},
520 {"signed-bitfields", &flag_signed_bitfields
, 1},
521 {"unsigned-bitfields", &flag_signed_bitfields
, 0},
522 {"short-enums", &flag_short_enums
, 1},
523 {"short-double", &flag_short_double
, 1},
524 {"short-wchar", &flag_short_wchar
, 1},
525 {"cond-mismatch", &flag_cond_mismatch
, 1},
526 {"asm", &flag_no_asm
, 0},
527 {"builtin", &flag_no_builtin
, 0},
529 /* C++-only options. */
530 {"access-control", &flag_access_control
, 1},
531 {"check-new", &flag_check_new
, 1},
532 {"conserve-space", &flag_conserve_space
, 1},
533 {"const-strings", &flag_const_strings
, 1},
534 {"default-inline", &flag_default_inline
, 1},
535 {"dollars-in-identifiers", &dollars_in_ident
, 1},
536 {"elide-constructors", &flag_elide_constructors
, 1},
537 {"enforce-eh-specs", &flag_enforce_eh_specs
, 1},
538 {"external-templates", &flag_external_templates
, 1},
539 {"for-scope", &flag_new_for_scope
, 2},
540 {"gnu-keywords", &flag_no_gnu_keywords
, 0},
541 {"handle-exceptions", &flag_exceptions
, 1},
542 {"honor-std", &flag_honor_std
, 1},
543 {"huge-objects", &flag_huge_objects
, 1},
544 {"implement-inlines", &flag_implement_inlines
, 1},
545 {"implicit-inline-templates", &flag_implicit_inline_templates
, 1},
546 {"implicit-templates", &flag_implicit_templates
, 1},
547 {"labels-ok", &flag_labels_ok
, 1},
548 {"ms-extensions", &flag_ms_extensions
, 1},
549 {"nonansi-builtins", &flag_no_nonansi_builtin
, 0},
550 {"operator-names", &flag_operator_names
, 1},
551 {"optional-diags", &flag_optional_diags
, 1},
552 {"permissive", &flag_permissive
, 1},
553 {"repo", &flag_use_repository
, 1},
554 {"rtti", &flag_rtti
, 1},
555 {"squangle", &flag_do_squangling
, 1},
556 {"stats", &flag_detailed_statistics
, 1},
557 {"strict-prototype", &flag_strict_prototype
, 1},
558 {"use-cxa-atexit", &flag_use_cxa_atexit
, 1},
559 {"vtable-gc", &flag_vtable_gc
, 1},
560 {"vtable-thunks", &flag_vtable_thunks
, 1},
561 {"weak", &flag_weak
, 1},
562 {"xref", &flag_gnu_xref
, 1}
565 /* The list of `-f' options that we no longer support. The `-f'
566 prefix is not given in this table. The `-fno-' variants are not
567 listed here. This table must be kept in alphabetical order. */
568 static const char * const unsupported_options
[] = {
576 /* Compare two option strings, pointed two by P1 and P2, for use with
580 compare_options (p1
, p2
)
584 return strcmp (*((char **) p1
), *((char **) p2
));
587 /* Decode the string P as a language-specific option.
588 Return the number of strings consumed for a valid option.
589 Otherwise return 0. Should not complain if it does not
590 recognise the option. */
593 lang_decode_option (argc
, argv
)
601 int strings_processed
;
602 const char *p
= argv
[0];
604 strings_processed
= cpp_handle_option (&parse_in
, argc
, argv
);
606 strings_processed
= 0;
607 #endif /* ! USE_CPPLIB */
609 if (!strcmp (p
, "-ftraditional") || !strcmp (p
, "-traditional"))
611 else if (p
[0] == '-' && p
[1] == 'f')
613 /* Some kind of -f option.
614 P's value is the option sans `-f'.
615 Search for it in the table of options. */
616 const char *option_value
= NULL
;
617 const char *positive_option
;
621 /* Try special -f options. */
623 /* See if this is one of the options no longer supported. We
624 used to support these options, so we continue to accept them,
626 if (strncmp (p
, "no-", strlen ("no-")) == 0)
627 positive_option
= p
+ strlen ("no-");
631 /* If the option is present, issue a warning. Indicate to our
632 caller that the option was processed successfully. */
633 if (bsearch (&positive_option
,
635 (sizeof (unsupported_options
)
636 / sizeof (unsupported_options
[0])),
637 sizeof (unsupported_options
[0]),
640 warning ("-f%s is no longer supported", p
);
644 if (!strcmp (p
, "handle-exceptions")
645 || !strcmp (p
, "no-handle-exceptions"))
646 warning ("-fhandle-exceptions has been renamed to -fexceptions (and is now on by default)");
647 else if (! strcmp (p
, "alt-external-templates"))
649 flag_external_templates
= 1;
650 flag_alt_external_templates
= 1;
651 cp_deprecated ("-falt-external-templates");
653 else if (! strcmp (p
, "no-alt-external-templates"))
654 flag_alt_external_templates
= 0;
655 else if (!strcmp (p
, "repo"))
657 flag_use_repository
= 1;
658 flag_implicit_templates
= 0;
660 else if (!strcmp (p
, "external-templates"))
662 flag_external_templates
= 1;
663 cp_deprecated ("-fexternal-templates");
665 else if (!strcmp (p
, "new-abi"))
668 flag_do_squangling
= 1;
669 flag_vtable_thunks
= 1;
671 else if (!strcmp (p
, "no-new-abi"))
674 flag_do_squangling
= 0;
676 else if ((option_value
677 = skip_leading_substring (p
, "template-depth-")))
679 = read_integral_parameter (option_value
, p
- 2, max_tinst_depth
);
680 else if ((option_value
681 = skip_leading_substring (p
, "name-mangling-version-")))
682 name_mangling_version
683 = read_integral_parameter (option_value
, p
- 2, name_mangling_version
);
684 else if ((option_value
685 = skip_leading_substring (p
, "dump-translation-unit-")))
688 error ("no file specified with -fdump-translation-unit");
690 flag_dump_translation_unit
= option_value
;
697 !found
&& j
< (sizeof (lang_f_options
)
698 / sizeof (lang_f_options
[0]));
701 if (!strcmp (p
, lang_f_options
[j
].string
))
703 *lang_f_options
[j
].variable
= lang_f_options
[j
].on_value
;
704 /* A goto here would be cleaner,
705 but breaks the vax pcc. */
708 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
709 && ! strcmp (p
+3, lang_f_options
[j
].string
))
711 *lang_f_options
[j
].variable
= ! lang_f_options
[j
].on_value
;
719 else if (p
[0] == '-' && p
[1] == 'W')
723 /* The -W options control the warning behavior of the compiler. */
726 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-')
729 if (!strcmp (p
, "implicit"))
730 warn_implicit
= setting
;
731 else if (!strcmp (p
, "long-long"))
732 warn_long_long
= setting
;
733 else if (!strcmp (p
, "return-type"))
734 warn_return_type
= setting
;
735 else if (!strcmp (p
, "ctor-dtor-privacy"))
736 warn_ctor_dtor_privacy
= setting
;
737 else if (!strcmp (p
, "write-strings"))
738 warn_write_strings
= setting
;
739 else if (!strcmp (p
, "cast-qual"))
740 warn_cast_qual
= setting
;
741 else if (!strcmp (p
, "char-subscripts"))
742 warn_char_subscripts
= setting
;
743 else if (!strcmp (p
, "pointer-arith"))
744 warn_pointer_arith
= setting
;
745 else if (!strcmp (p
, "missing-prototypes"))
746 warn_missing_prototypes
= setting
;
747 else if (!strcmp (p
, "redundant-decls"))
748 warn_redundant_decls
= setting
;
749 else if (!strcmp (p
, "missing-braces"))
750 warn_missing_braces
= setting
;
751 else if (!strcmp (p
, "sign-compare"))
752 warn_sign_compare
= setting
;
753 else if (!strcmp (p
, "float-equal"))
754 warn_float_equal
= setting
;
755 else if (!strcmp (p
, "format"))
756 warn_format
= setting
;
757 else if (!strcmp (p
, "conversion"))
758 warn_conversion
= setting
;
759 else if (!strcmp (p
, "parentheses"))
760 warn_parentheses
= setting
;
761 else if (!strcmp (p
, "non-virtual-dtor"))
762 warn_nonvdtor
= setting
;
763 else if (!strcmp (p
, "extern-inline"))
764 warn_extern_inline
= setting
;
765 else if (!strcmp (p
, "reorder"))
766 warn_reorder
= setting
;
767 else if (!strcmp (p
, "synth"))
768 warn_synth
= setting
;
769 else if (!strcmp (p
, "pmf-conversions"))
770 warn_pmf2ptr
= setting
;
771 else if (!strcmp (p
, "effc++"))
773 else if (!strcmp (p
, "sign-promo"))
774 warn_sign_promo
= setting
;
775 else if (!strcmp (p
, "old-style-cast"))
776 warn_old_style_cast
= setting
;
777 else if (!strcmp (p
, "overloaded-virtual"))
778 warn_overloaded_virtual
= setting
;
779 else if (!strcmp (p
, "multichar"))
780 warn_multichar
= setting
;
781 else if (!strcmp (p
, "unknown-pragmas"))
782 /* Set to greater than 1, so that even unknown pragmas in
783 system headers will be warned about. */
784 warn_unknown_pragmas
= setting
* 2;
785 else if (!strcmp (p
, "non-template-friend"))
786 warn_nontemplate_friend
= setting
;
787 else if (!strcmp (p
, "deprecated"))
788 warn_deprecated
= setting
;
789 else if (!strcmp (p
, "comment"))
790 ; /* cpp handles this one. */
791 else if (!strcmp (p
, "comments"))
792 ; /* cpp handles this one. */
793 else if (!strcmp (p
, "trigraphs"))
794 ; /* cpp handles this one. */
795 else if (!strcmp (p
, "import"))
796 ; /* cpp handles this one. */
797 else if (!strcmp (p
, "all"))
799 warn_return_type
= setting
;
800 set_Wunused (setting
);
801 warn_implicit
= setting
;
802 warn_switch
= setting
;
803 warn_format
= setting
;
804 warn_parentheses
= setting
;
805 warn_missing_braces
= setting
;
806 warn_sign_compare
= setting
;
807 warn_multichar
= setting
;
808 /* We save the value of warn_uninitialized, since if they put
809 -Wuninitialized on the command line, we need to generate a
810 warning about not using it without also specifying -O. */
811 if (warn_uninitialized
!= 1)
812 warn_uninitialized
= (setting
? 2 : 0);
813 /* Only warn about unknown pragmas that are not in system
815 warn_unknown_pragmas
= 1;
817 /* C++-specific warnings. */
818 warn_ctor_dtor_privacy
= setting
;
819 warn_nonvdtor
= setting
;
820 warn_reorder
= setting
;
821 warn_nontemplate_friend
= setting
;
823 else return strings_processed
;
825 else if (!strcmp (p
, "-ansi"))
826 flag_no_nonansi_builtin
= 1, flag_ansi
= 1,
827 flag_no_gnu_keywords
= 1;
829 /* Undocumented, only ever used when you're invoking cc1plus by hand, since
830 it's probably safe to assume no sane person would ever want to use this
831 under normal circumstances. */
832 else if (!strcmp (p
, "-spew-debug"))
836 return strings_processed
;
841 /* Incorporate `const' and `volatile' qualifiers for member functions.
842 FUNCTION is a TYPE_DECL or a FUNCTION_DECL.
843 QUALS is a list of qualifiers. Returns any explicit
844 top-level qualifiers of the method's this pointer, anything other than
845 TYPE_UNQUALIFIED will be an extension. */
848 grok_method_quals (ctype
, function
, quals
)
849 tree ctype
, function
, quals
;
851 tree fntype
= TREE_TYPE (function
);
852 tree raises
= TYPE_RAISES_EXCEPTIONS (fntype
);
853 int type_quals
= TYPE_UNQUALIFIED
;
854 int dup_quals
= TYPE_UNQUALIFIED
;
855 int this_quals
= TYPE_UNQUALIFIED
;
859 int tq
= cp_type_qual_from_rid (TREE_VALUE (quals
));
861 if ((type_quals
| this_quals
) & tq
)
863 else if (tq
& TYPE_QUAL_RESTRICT
)
867 quals
= TREE_CHAIN (quals
);
871 if (dup_quals
!= TYPE_UNQUALIFIED
)
872 cp_error ("duplicate type qualifiers in %s declaration",
873 TREE_CODE (function
) == FUNCTION_DECL
874 ? "member function" : "type");
876 ctype
= cp_build_qualified_type (ctype
, type_quals
);
877 fntype
= build_cplus_method_type (ctype
, TREE_TYPE (fntype
),
878 (TREE_CODE (fntype
) == METHOD_TYPE
879 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype
))
880 : TYPE_ARG_TYPES (fntype
)));
882 fntype
= build_exception_variant (fntype
, raises
);
884 TREE_TYPE (function
) = fntype
;
888 /* Warn when -fexternal-templates is used and #pragma
889 interface/implementation is not used all the times it should be,
893 warn_if_unknown_interface (decl
)
896 static int already_warned
= 0;
897 if (already_warned
++)
900 if (flag_alt_external_templates
)
902 tree til
= tinst_for_decl ();
904 const char *sf
= input_filename
;
908 lineno
= TINST_LINE (til
);
909 input_filename
= TINST_FILE (til
);
911 cp_warning ("template `%#D' instantiated in file without #pragma interface",
917 cp_warning_at ("template `%#D' defined in file without #pragma interface",
921 /* A subroutine of the parser, to handle a component list. */
924 grok_x_components (specs
)
927 struct pending_inline
**p
;
930 specs
= strip_attrs (specs
);
932 check_tag_decl (specs
);
933 t
= groktypename (build_decl_list (specs
, NULL_TREE
));
935 /* The only case where we need to do anything additional here is an
936 anonymous union field, e.g.: `struct S { union { int i; }; };'. */
937 if (t
== NULL_TREE
|| !ANON_AGGR_TYPE_P (t
))
940 fixup_anonymous_aggr (t
);
941 finish_member_declaration (build_decl (FIELD_DECL
, NULL_TREE
, t
));
943 /* Ignore any inline function definitions in the anonymous union
944 since an anonymous union may not have function members. */
945 p
= &pending_inlines
;
946 for (; *p
; *p
= (*p
)->next
)
947 if (DECL_CONTEXT ((*p
)->fndecl
) != t
)
951 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
955 build_artificial_parm (name
, type
)
961 parm
= build_decl (PARM_DECL
, name
, type
);
962 SET_DECL_ARTIFICIAL (parm
);
963 DECL_ARG_TYPE (parm
) = type
;
967 /* Constructors for types with virtual baseclasses need an "in-charge" flag
968 saying whether this constructor is responsible for initialization of
969 virtual baseclasses or not. All destructors also need this "in-charge"
970 flag, which additionally determines whether or not the destructor should
971 free the memory for the object.
973 This function adds the "in-charge" flag to member function FN if
974 appropriate. It is called from grokclassfn and tsubst.
975 FN must be either a constructor or destructor. */
978 maybe_retrofit_in_chrg (fn
)
981 tree basetype
, arg_types
, parms
, parm
, fntype
;
983 /* If we've already add the in-charge parameter don't do it again. */
984 if (DECL_HAS_IN_CHARGE_PARM_P (fn
))
987 /* When processing templates we can't know, in general, whether or
988 not we're going to have virtual baseclasses. */
989 if (uses_template_parms (fn
))
992 /* We don't need an in-charge parameter for constructors that don't
993 have virtual bases. */
994 if (DECL_CONSTRUCTOR_P (fn
)
995 && !TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (fn
)))
998 /* First add it to DECL_ARGUMENTS... */
999 parm
= build_artificial_parm (in_charge_identifier
, integer_type_node
);
1000 TREE_READONLY (parm
) = 1;
1001 parms
= DECL_ARGUMENTS (fn
);
1002 TREE_CHAIN (parm
) = TREE_CHAIN (parms
);
1003 TREE_CHAIN (parms
) = parm
;
1005 /* ...and then to TYPE_ARG_TYPES. */
1006 arg_types
= TYPE_ARG_TYPES (TREE_TYPE (fn
));
1007 basetype
= TREE_TYPE (TREE_VALUE (arg_types
));
1008 arg_types
= hash_tree_chain (integer_type_node
, TREE_CHAIN (arg_types
));
1009 fntype
= build_cplus_method_type (basetype
, TREE_TYPE (TREE_TYPE (fn
)),
1011 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
)))
1012 fntype
= build_exception_variant (fntype
,
1013 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
)));
1014 TREE_TYPE (fn
) = fntype
;
1016 /* Now we've got the in-charge parameter. */
1017 DECL_HAS_IN_CHARGE_PARM_P (fn
) = 1;
1019 /* If this is a subobject constructor or destructor, our caller will
1020 pass us a pointer to our VTT. */
1021 if (flag_new_abi
&& TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (fn
)))
1023 DECL_VTT_PARM (fn
) = build_artificial_parm (vtt_parm_identifier
,
1025 DECL_CONTEXT (DECL_VTT_PARM (fn
)) = fn
;
1026 DECL_USE_VTT_PARM (fn
) = build_artificial_parm (NULL_TREE
,
1028 DECL_CONTEXT (DECL_USE_VTT_PARM (fn
)) = fn
;
1032 /* Classes overload their constituent function names automatically.
1033 When a function name is declared in a record structure,
1034 its name is changed to it overloaded name. Since names for
1035 constructors and destructors can conflict, we place a leading
1036 '$' for destructors.
1038 CNAME is the name of the class we are grokking for.
1040 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
1042 FLAGS contains bits saying what's special about today's
1043 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
1045 If FUNCTION is a destructor, then we must add the `auto-delete' field
1046 as a second parameter. There is some hair associated with the fact
1047 that we must "declare" this variable in the manner consistent with the
1048 way the rest of the arguments were declared.
1050 QUALS are the qualifiers for the this pointer. */
1053 grokclassfn (ctype
, function
, flags
, quals
)
1054 tree ctype
, function
;
1055 enum overload_flags flags
;
1058 tree fn_name
= DECL_NAME (function
);
1059 int this_quals
= TYPE_UNQUALIFIED
;
1061 /* Even within an `extern "C"' block, members get C++ linkage. See
1062 [dcl.link] for details. */
1063 DECL_LANGUAGE (function
) = lang_cplusplus
;
1065 if (fn_name
== NULL_TREE
)
1067 error ("name missing for member function");
1068 fn_name
= get_identifier ("<anonymous>");
1069 DECL_NAME (function
) = fn_name
;
1073 this_quals
= grok_method_quals (ctype
, function
, quals
);
1075 if (TREE_CODE (TREE_TYPE (function
)) == METHOD_TYPE
)
1077 /* Must add the class instance variable up front. */
1078 /* Right now we just make this a pointer. But later
1079 we may wish to make it special. */
1080 tree type
= TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (function
)));
1084 /* The `this' parameter is implicitly `const'; it cannot be
1086 this_quals
|= TYPE_QUAL_CONST
;
1087 qual_type
= cp_build_qualified_type (type
, this_quals
);
1088 parm
= build_artificial_parm (this_identifier
, qual_type
);
1089 c_apply_type_quals_to_decl (this_quals
, parm
);
1091 /* We can make this a register, so long as we don't
1092 accidentally complain if someone tries to take its address. */
1093 DECL_REGISTER (parm
) = 1;
1094 TREE_CHAIN (parm
) = last_function_parms
;
1095 last_function_parms
= parm
;
1098 DECL_ARGUMENTS (function
) = last_function_parms
;
1099 DECL_CONTEXT (function
) = ctype
;
1101 if (flags
== DTOR_FLAG
|| DECL_CONSTRUCTOR_P (function
))
1102 maybe_retrofit_in_chrg (function
);
1104 if (flags
== DTOR_FLAG
)
1106 DECL_DESTRUCTOR_P (function
) = 1;
1109 set_mangled_name_for_decl (function
);
1111 DECL_ASSEMBLER_NAME (function
) = build_destructor_name (ctype
);
1113 TYPE_HAS_DESTRUCTOR (ctype
) = 1;
1116 set_mangled_name_for_decl (function
);
1119 /* Work on the expr used by alignof (this is only called by the parser). */
1128 if (processing_template_decl
)
1129 return build_min (ALIGNOF_EXPR
, sizetype
, expr
);
1131 if (TREE_CODE (expr
) == COMPONENT_REF
1132 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
, 1)))
1133 error ("`__alignof__' applied to a bit-field");
1135 if (TREE_CODE (expr
) == INDIRECT_REF
)
1137 best
= t
= TREE_OPERAND (expr
, 0);
1138 bestalign
= TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t
)));
1140 while (TREE_CODE (t
) == NOP_EXPR
1141 && TREE_CODE (TREE_TYPE (TREE_OPERAND (t
, 0))) == POINTER_TYPE
)
1144 t
= TREE_OPERAND (t
, 0);
1145 thisalign
= TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t
)));
1146 if (thisalign
> bestalign
)
1147 best
= t
, bestalign
= thisalign
;
1149 return c_alignof (TREE_TYPE (TREE_TYPE (best
)));
1152 return c_alignof (TREE_TYPE (expr
));
1155 /* Create an ARRAY_REF, checking for the user doing things backwards
1159 grok_array_decl (array_expr
, index_exp
)
1160 tree array_expr
, index_exp
;
1162 tree type
= TREE_TYPE (array_expr
);
1163 tree p1
, p2
, i1
, i2
;
1165 if (type
== error_mark_node
|| index_exp
== error_mark_node
)
1166 return error_mark_node
;
1167 if (processing_template_decl
)
1168 return build_min (ARRAY_REF
, type
? TREE_TYPE (type
) : NULL_TREE
,
1169 array_expr
, index_exp
);
1171 if (type
== NULL_TREE
)
1173 /* Something has gone very wrong. Assume we are mistakenly reducing
1174 an expression instead of a declaration. */
1175 error ("parser may be lost: is there a '{' missing somewhere?");
1179 if (TREE_CODE (type
) == OFFSET_TYPE
1180 || TREE_CODE (type
) == REFERENCE_TYPE
)
1181 type
= TREE_TYPE (type
);
1183 /* If they have an `operator[]', use that. */
1184 if (IS_AGGR_TYPE (type
) || IS_AGGR_TYPE (TREE_TYPE (index_exp
)))
1185 return build_opfncall (ARRAY_REF
, LOOKUP_NORMAL
,
1186 array_expr
, index_exp
, NULL_TREE
);
1188 /* Otherwise, create an ARRAY_REF for a pointer or array type. It
1189 is a little-known fact that, if `a' is an array and `i' is an
1190 int, you can write `i[a]', which means the same thing as `a[i]'. */
1192 if (TREE_CODE (type
) == ARRAY_TYPE
)
1195 p1
= build_expr_type_conversion (WANT_POINTER
, array_expr
, 0);
1197 if (TREE_CODE (TREE_TYPE (index_exp
)) == ARRAY_TYPE
)
1200 p2
= build_expr_type_conversion (WANT_POINTER
, index_exp
, 0);
1202 i1
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
, array_expr
, 0);
1203 i2
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
, index_exp
, 0);
1205 if ((p1
&& i2
) && (i1
&& p2
))
1206 error ("ambiguous conversion for array subscript");
1209 array_expr
= p1
, index_exp
= i2
;
1211 array_expr
= p2
, index_exp
= i1
;
1214 cp_error ("invalid types `%T[%T]' for array subscript",
1215 type
, TREE_TYPE (index_exp
));
1216 return error_mark_node
;
1219 if (array_expr
== error_mark_node
|| index_exp
== error_mark_node
)
1220 error ("ambiguous conversion for array subscript");
1222 return build_array_ref (array_expr
, index_exp
);
1225 /* Given the cast expression EXP, checking out its validity. Either return
1226 an error_mark_node if there was an unavoidable error, return a cast to
1227 void for trying to delete a pointer w/ the value 0, or return the
1228 call to delete. If DOING_VEC is 1, we handle things differently
1229 for doing an array delete. If DOING_VEC is 2, they gave us the
1230 array size as an argument to delete.
1231 Implements ARM $5.3.4. This is called from the parser. */
1234 delete_sanity (exp
, size
, doing_vec
, use_global_delete
)
1236 int doing_vec
, use_global_delete
;
1239 /* For a regular vector delete (aka, no size argument) we will pass
1240 this down as a NULL_TREE into build_vec_delete. */
1241 tree maxindex
= NULL_TREE
;
1243 if (exp
== error_mark_node
)
1246 if (processing_template_decl
)
1248 t
= build_min (DELETE_EXPR
, void_type_node
, exp
, size
);
1249 DELETE_EXPR_USE_GLOBAL (t
) = use_global_delete
;
1250 DELETE_EXPR_USE_VEC (t
) = doing_vec
;
1254 if (TREE_CODE (exp
) == OFFSET_REF
)
1255 exp
= resolve_offset_ref (exp
);
1256 exp
= convert_from_reference (exp
);
1257 t
= stabilize_reference (exp
);
1258 t
= build_expr_type_conversion (WANT_POINTER
, t
, 1);
1260 if (t
== NULL_TREE
|| t
== error_mark_node
)
1262 cp_error ("type `%#T' argument given to `delete', expected pointer",
1264 return error_mark_node
;
1269 maxindex
= build_binary_op (MINUS_EXPR
, size
, integer_one_node
);
1270 pedwarn ("anachronistic use of array size in vector delete");
1273 type
= TREE_TYPE (t
);
1275 /* As of Valley Forge, you can delete a pointer to const. */
1277 /* You can't delete functions. */
1278 if (TREE_CODE (TREE_TYPE (type
)) == FUNCTION_TYPE
)
1280 error ("cannot delete a function. Only pointer-to-objects are valid arguments to `delete'");
1281 return error_mark_node
;
1284 /* Deleting ptr to void is undefined behaviour [expr.delete/3]. */
1285 if (TREE_CODE (TREE_TYPE (type
)) == VOID_TYPE
)
1286 cp_warning ("`%T' is not a pointer-to-object type", type
);
1288 /* An array can't have been allocated by new, so complain. */
1289 if (TREE_CODE (t
) == ADDR_EXPR
1290 && TREE_CODE (TREE_OPERAND (t
, 0)) == VAR_DECL
1291 && TREE_CODE (TREE_TYPE (TREE_OPERAND (t
, 0))) == ARRAY_TYPE
)
1292 cp_warning ("deleting array `%#D'", TREE_OPERAND (t
, 0));
1294 /* Deleting a pointer with the value zero is valid and has no effect. */
1295 if (integer_zerop (t
))
1296 return build1 (NOP_EXPR
, void_type_node
, t
);
1299 return build_vec_delete (t
, maxindex
, sfk_deleting_destructor
,
1303 if (IS_AGGR_TYPE (TREE_TYPE (type
))
1304 && TYPE_GETS_REG_DELETE (TREE_TYPE (type
)))
1306 /* Only do access checking here; we'll be calling op delete
1307 from the destructor. */
1308 tree tmp
= build_op_delete_call (DELETE_EXPR
, t
, size_zero_node
,
1309 LOOKUP_NORMAL
, NULL_TREE
);
1310 if (tmp
== error_mark_node
)
1311 return error_mark_node
;
1314 return build_delete (type
, t
, sfk_deleting_destructor
,
1315 LOOKUP_NORMAL
, use_global_delete
);
1319 /* Report an error if the indicated template declaration is not the
1320 sort of thing that should be a member template. */
1323 check_member_template (tmpl
)
1328 my_friendly_assert (TREE_CODE (tmpl
) == TEMPLATE_DECL
, 0);
1329 decl
= DECL_TEMPLATE_RESULT (tmpl
);
1331 if (TREE_CODE (decl
) == FUNCTION_DECL
1332 || (TREE_CODE (decl
) == TYPE_DECL
1333 && IS_AGGR_TYPE (TREE_TYPE (decl
))))
1335 if (current_function_decl
)
1336 /* 14.5.2.2 [temp.mem]
1338 A local class shall not have member templates. */
1339 cp_error ("invalid declaration of member template `%#D' in local class",
1342 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VIRTUAL_P (decl
))
1344 /* 14.5.2.3 [temp.mem]
1346 A member function template shall not be virtual. */
1348 ("invalid use of `virtual' in template declaration of `%#D'",
1350 DECL_VIRTUAL_P (decl
) = 0;
1353 /* The debug-information generating code doesn't know what to do
1354 with member templates. */
1355 DECL_IGNORED_P (tmpl
) = 1;
1358 cp_error ("template declaration of `%#D'", decl
);
1361 /* Return true iff TYPE is a valid Java parameter or return type. */
1364 acceptable_java_type (type
)
1367 if (TREE_CODE (type
) == VOID_TYPE
|| TYPE_FOR_JAVA (type
))
1369 if (TREE_CODE (type
) == POINTER_TYPE
)
1371 type
= TREE_TYPE (type
);
1372 if (TREE_CODE (type
) == RECORD_TYPE
)
1375 if (! TYPE_FOR_JAVA (type
))
1377 if (! CLASSTYPE_TEMPLATE_INFO (type
))
1379 args
= CLASSTYPE_TI_ARGS (type
);
1380 i
= TREE_VEC_LENGTH (args
);
1383 type
= TREE_VEC_ELT (args
, i
);
1384 if (TREE_CODE (type
) == POINTER_TYPE
)
1385 type
= TREE_TYPE (type
);
1386 if (! TYPE_FOR_JAVA (type
))
1395 /* For a METHOD in a Java class CTYPE, return 1 if
1396 the parameter and return types are valid Java types.
1397 Otherwise, print appropriate error messages, and return 0. */
1400 check_java_method (method
)
1404 tree arg_types
= TYPE_ARG_TYPES (TREE_TYPE (method
));
1405 tree ret_type
= TREE_TYPE (TREE_TYPE (method
));
1406 if (! acceptable_java_type (ret_type
))
1408 cp_error ("Java method '%D' has non-Java return type `%T'",
1412 for (; arg_types
!= NULL_TREE
; arg_types
= TREE_CHAIN (arg_types
))
1414 tree type
= TREE_VALUE (arg_types
);
1415 if (! acceptable_java_type (type
))
1417 cp_error ("Java method '%D' has non-Java parameter type `%T'",
1422 return jerr
? 0 : 1;
1425 /* Sanity check: report error if this function FUNCTION is not
1426 really a member of the class (CTYPE) it is supposed to belong to.
1427 CNAME is the same here as it is for grokclassfn above. */
1430 check_classfn (ctype
, function
)
1431 tree ctype
, function
;
1433 tree fn_name
= DECL_NAME (function
);
1434 tree fndecl
, fndecls
;
1435 tree method_vec
= CLASSTYPE_METHOD_VEC (complete_type (ctype
));
1439 if (DECL_USE_TEMPLATE (function
)
1440 && !(TREE_CODE (function
) == TEMPLATE_DECL
1441 && DECL_TEMPLATE_SPECIALIZATION (function
))
1442 && is_member_template (DECL_TI_TEMPLATE (function
)))
1443 /* Since this is a specialization of a member template,
1444 we're not going to find the declaration in the class.
1447 struct S { template <typename T> void f(T); };
1448 template <> void S::f(int);
1450 we're not going to find `S::f(int)', but there's no
1451 reason we should, either. We let our callers know we didn't
1452 find the method, but we don't complain. */
1455 if (method_vec
!= 0)
1457 methods
= &TREE_VEC_ELT (method_vec
, 0);
1458 end
= TREE_VEC_END (method_vec
);
1460 /* First suss out ctors and dtors. */
1461 if (*methods
&& fn_name
== DECL_NAME (OVL_CURRENT (*methods
))
1462 && DECL_CONSTRUCTOR_P (function
))
1464 if (*++methods
&& fn_name
== DECL_NAME (OVL_CURRENT (*methods
))
1465 && DECL_DESTRUCTOR_P (function
))
1468 while (++methods
!= end
&& *methods
)
1471 if (fn_name
== DECL_NAME (OVL_CURRENT (*methods
)))
1474 for (fndecls
= *methods
; fndecls
!= NULL_TREE
;
1475 fndecls
= OVL_NEXT (fndecls
))
1477 fndecl
= OVL_CURRENT (fndecls
);
1478 /* The DECL_ASSEMBLER_NAME for a TEMPLATE_DECL, or
1479 for a for member function of a template class, is
1480 not mangled, so the check below does not work
1481 correctly in that case. Since mangled destructor
1482 names do not include the type of the arguments,
1483 we can't use this short-cut for them, either.
1484 (It's not legal to declare arguments for a
1485 destructor, but some people try.) */
1486 if (!DECL_DESTRUCTOR_P (function
)
1487 && (DECL_ASSEMBLER_NAME (function
)
1488 != DECL_NAME (function
))
1489 && (DECL_ASSEMBLER_NAME (fndecl
)
1490 != DECL_NAME (fndecl
))
1491 && (DECL_ASSEMBLER_NAME (function
)
1492 == DECL_ASSEMBLER_NAME (fndecl
)))
1495 /* We cannot simply call decls_match because this
1496 doesn't work for static member functions that are
1497 pretending to be methods, and because the name
1498 may have been changed by asm("new_name"). */
1499 if (DECL_NAME (function
) == DECL_NAME (fndecl
))
1501 tree p1
= TYPE_ARG_TYPES (TREE_TYPE (function
));
1502 tree p2
= TYPE_ARG_TYPES (TREE_TYPE (fndecl
));
1504 /* Get rid of the this parameter on functions that become
1506 if (DECL_STATIC_FUNCTION_P (fndecl
)
1507 && TREE_CODE (TREE_TYPE (function
)) == METHOD_TYPE
)
1508 p1
= TREE_CHAIN (p1
);
1510 if (same_type_p (TREE_TYPE (TREE_TYPE (function
)),
1511 TREE_TYPE (TREE_TYPE (fndecl
)))
1512 && compparms (p1
, p2
)
1513 && (DECL_TEMPLATE_SPECIALIZATION (function
)
1514 == DECL_TEMPLATE_SPECIALIZATION (fndecl
))
1515 && (!DECL_TEMPLATE_SPECIALIZATION (function
)
1516 || (DECL_TI_TEMPLATE (function
)
1517 == DECL_TI_TEMPLATE (fndecl
))))
1526 if (methods
!= end
&& *methods
)
1528 tree fndecl
= *methods
;
1529 cp_error ("prototype for `%#D' does not match any in class `%T'",
1531 cp_error_at ("candidate%s: %+#D", OVL_NEXT (fndecl
) ? "s are" : " is",
1532 OVL_CURRENT (fndecl
));
1533 while (fndecl
= OVL_NEXT (fndecl
), fndecl
)
1534 cp_error_at (" %#D", OVL_CURRENT(fndecl
));
1539 if (!COMPLETE_TYPE_P (ctype
))
1540 incomplete_type_error (function
, ctype
);
1542 cp_error ("no `%#D' member function declared in class `%T'",
1546 /* If we did not find the method in the class, add it to avoid
1547 spurious errors (unless the CTYPE is not yet defined, in which
1548 case we'll only confuse ourselves when the function is declared
1549 properly within the class. */
1550 if (COMPLETE_TYPE_P (ctype
))
1551 add_method (ctype
, methods
, function
);
1555 /* We have just processed the DECL, which is a static data member.
1556 Its initializer, if present, is INIT. The ASMSPEC_TREE, if
1557 present, is the assembly-language name for the data member.
1558 FLAGS is as for cp_finish_decl. */
1561 finish_static_data_member_decl (decl
, init
, asmspec_tree
, flags
)
1567 const char *asmspec
= 0;
1570 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
1572 my_friendly_assert (TREE_PUBLIC (decl
), 0);
1574 DECL_CONTEXT (decl
) = current_class_type
;
1576 /* We cannot call pushdecl here, because that would fill in the
1577 decl of our TREE_CHAIN. Instead, we modify cp_finish_decl to do
1578 the right thing, namely, to put this decl out straight away. */
1579 /* current_class_type can be NULL_TREE in case of error. */
1580 if (!asmspec
&& current_class_type
)
1582 DECL_INITIAL (decl
) = error_mark_node
;
1584 DECL_ASSEMBLER_NAME (decl
) = mangle_decl (decl
);
1586 DECL_ASSEMBLER_NAME (decl
)
1587 = build_static_name (current_class_type
, DECL_NAME (decl
));
1589 if (! processing_template_decl
)
1591 if (!pending_statics
)
1592 VARRAY_TREE_INIT (pending_statics
, 32, "pending_statics");
1593 VARRAY_PUSH_TREE (pending_statics
, decl
);
1596 /* Static consts need not be initialized in the class definition. */
1597 if (init
!= NULL_TREE
&& TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
)))
1599 static int explanation
= 0;
1601 error ("initializer invalid for static member with constructor");
1602 if (explanation
++ == 0)
1603 error ("(you really want to initialize it separately)");
1606 /* Force the compiler to know when an uninitialized static const
1607 member is being used. */
1608 if (CP_TYPE_CONST_P (TREE_TYPE (decl
)) && init
== 0)
1609 TREE_USED (decl
) = 1;
1610 DECL_INITIAL (decl
) = init
;
1611 DECL_IN_AGGR_P (decl
) = 1;
1613 cp_finish_decl (decl
, init
, asmspec_tree
, flags
);
1616 /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted)
1617 of a structure component, returning a FIELD_DECL node.
1618 QUALS is a list of type qualifiers for this decl (such as for declaring
1619 const member functions).
1621 This is done during the parsing of the struct declaration.
1622 The FIELD_DECL nodes are chained together and the lot of them
1623 are ultimately passed to `build_struct' to make the RECORD_TYPE node.
1627 If class A defines that certain functions in class B are friends, then
1628 the way I have set things up, it is B who is interested in permission
1629 granted by A. However, it is in A's context that these declarations
1630 are parsed. By returning a void_type_node, class A does not attempt
1631 to incorporate the declarations of the friends within its structure.
1633 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
1634 CHANGES TO CODE IN `start_method'. */
1637 grokfield (declarator
, declspecs
, init
, asmspec_tree
, attrlist
)
1638 tree declarator
, declspecs
, init
, asmspec_tree
, attrlist
;
1640 register tree value
;
1641 const char *asmspec
= 0;
1642 int flags
= LOOKUP_ONLYCONVERTING
;
1644 /* Convert () initializers to = initializers. */
1645 if (init
== NULL_TREE
&& declarator
!= NULL_TREE
1646 && TREE_CODE (declarator
) == CALL_EXPR
1647 && TREE_OPERAND (declarator
, 0)
1648 && (TREE_CODE (TREE_OPERAND (declarator
, 0)) == IDENTIFIER_NODE
1649 || TREE_CODE (TREE_OPERAND (declarator
, 0)) == SCOPE_REF
)
1650 && parmlist_is_exprlist (CALL_DECLARATOR_PARMS (declarator
)))
1652 /* It's invalid to try to initialize a data member using a
1653 functional notation, e.g.:
1659 Explain that to the user. */
1660 static int explained_p
;
1662 cp_error ("invalid data member initiailization");
1665 cp_error ("use `=' to initialize static data members");
1669 declarator
= TREE_OPERAND (declarator
, 0);
1673 if (declspecs
== NULL_TREE
1674 && TREE_CODE (declarator
) == SCOPE_REF
1675 && TREE_CODE (TREE_OPERAND (declarator
, 1)) == IDENTIFIER_NODE
)
1677 /* Access declaration */
1678 if (! IS_AGGR_TYPE_CODE (TREE_CODE (TREE_OPERAND (declarator
, 0))))
1680 else if (TREE_COMPLEXITY (declarator
) == current_class_depth
)
1681 pop_nested_class ();
1682 return do_class_using_decl (declarator
);
1686 && TREE_CODE (init
) == TREE_LIST
1687 && TREE_VALUE (init
) == error_mark_node
1688 && TREE_CHAIN (init
) == NULL_TREE
)
1691 value
= grokdeclarator (declarator
, declspecs
, FIELD
, init
!= 0, attrlist
);
1692 if (! value
|| value
== error_mark_node
)
1693 /* friend or constructor went bad. */
1695 if (TREE_TYPE (value
) == error_mark_node
)
1696 return error_mark_node
;
1698 /* Pass friendly classes back. */
1699 if (TREE_CODE (value
) == VOID_TYPE
)
1700 return void_type_node
;
1702 if (DECL_NAME (value
) != NULL_TREE
1703 && IDENTIFIER_POINTER (DECL_NAME (value
))[0] == '_'
1704 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value
)), "_vptr"))
1705 cp_error ("member `%D' conflicts with virtual function table field name",
1708 /* Stash away type declarations. */
1709 if (TREE_CODE (value
) == TYPE_DECL
)
1711 DECL_NONLOCAL (value
) = 1;
1712 DECL_CONTEXT (value
) = current_class_type
;
1714 /* Now that we've updated the context, we need to remangle the
1715 name for this TYPE_DECL. */
1716 DECL_ASSEMBLER_NAME (value
) = DECL_NAME (value
);
1717 if (!uses_template_parms (value
))
1720 DECL_ASSEMBLER_NAME (value
) = mangle_type (TREE_TYPE (value
));
1722 DECL_ASSEMBLER_NAME (value
) =
1723 get_identifier (build_overload_name (TREE_TYPE (value
), 1, 1));
1726 if (processing_template_decl
)
1727 value
= push_template_decl (value
);
1732 if (DECL_IN_AGGR_P (value
))
1734 cp_error ("`%D' is already defined in `%T'", value
,
1735 DECL_CONTEXT (value
));
1736 return void_type_node
;
1740 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
1744 if (TREE_CODE (value
) == FUNCTION_DECL
)
1746 grok_function_init (value
, init
);
1749 else if (pedantic
&& TREE_CODE (value
) != VAR_DECL
)
1750 /* Already complained in grokdeclarator. */
1754 /* We allow initializers to become parameters to base
1756 if (TREE_CODE (init
) == TREE_LIST
)
1758 if (TREE_CHAIN (init
) == NULL_TREE
)
1759 init
= TREE_VALUE (init
);
1761 init
= digest_init (TREE_TYPE (value
), init
, (tree
*)0);
1764 if (TREE_CODE (init
) == CONST_DECL
)
1765 init
= DECL_INITIAL (init
);
1766 else if (TREE_READONLY_DECL_P (init
))
1767 init
= decl_constant_value (init
);
1768 else if (TREE_CODE (init
) == CONSTRUCTOR
)
1769 init
= digest_init (TREE_TYPE (value
), init
, (tree
*)0);
1770 if (init
== error_mark_node
)
1771 /* We must make this look different than `error_mark_node'
1772 because `decl_const_value' would mis-interpret it
1773 as only meaning that this VAR_DECL is defined. */
1774 init
= build1 (NOP_EXPR
, TREE_TYPE (value
), init
);
1775 else if (processing_template_decl
)
1777 else if (! TREE_CONSTANT (init
))
1779 /* We can allow references to things that are effectively
1780 static, since references are initialized with the address. */
1781 if (TREE_CODE (TREE_TYPE (value
)) != REFERENCE_TYPE
1782 || (TREE_STATIC (init
) == 0
1783 && (!DECL_P (init
) || DECL_EXTERNAL (init
) == 0)))
1785 error ("field initializer is not constant");
1786 init
= error_mark_node
;
1792 if (processing_template_decl
&& ! current_function_decl
1793 && (TREE_CODE (value
) == VAR_DECL
|| TREE_CODE (value
) == FUNCTION_DECL
))
1794 value
= push_template_decl (value
);
1797 cplus_decl_attributes (value
, TREE_PURPOSE (attrlist
),
1798 TREE_VALUE (attrlist
));
1800 if (TREE_CODE (value
) == VAR_DECL
)
1802 finish_static_data_member_decl (value
, init
, asmspec_tree
,
1806 if (TREE_CODE (value
) == FIELD_DECL
)
1810 /* This must override the asm specifier which was placed
1811 by grokclassfn. Lay this out fresh. */
1812 DECL_RTL (value
) = NULL_RTX
;
1813 DECL_ASSEMBLER_NAME (value
) = get_identifier (asmspec
);
1815 if (DECL_INITIAL (value
) == error_mark_node
)
1816 init
= error_mark_node
;
1817 cp_finish_decl (value
, init
, asmspec_tree
, flags
);
1818 DECL_INITIAL (value
) = init
;
1819 DECL_IN_AGGR_P (value
) = 1;
1822 if (TREE_CODE (value
) == FUNCTION_DECL
)
1826 /* This must override the asm specifier which was placed
1827 by grokclassfn. Lay this out fresh. */
1828 DECL_RTL (value
) = NULL_RTX
;
1829 DECL_ASSEMBLER_NAME (value
) = get_identifier (asmspec
);
1831 cp_finish_decl (value
, init
, asmspec_tree
, flags
);
1833 /* Pass friends back this way. */
1834 if (DECL_FRIEND_P (value
))
1835 return void_type_node
;
1837 DECL_IN_AGGR_P (value
) = 1;
1840 my_friendly_abort (21);
1845 /* Like `grokfield', but for bitfields.
1846 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
1849 grokbitfield (declarator
, declspecs
, width
)
1850 tree declarator
, declspecs
, width
;
1852 register tree value
= grokdeclarator (declarator
, declspecs
, BITFIELD
,
1855 if (! value
) return NULL_TREE
; /* friends went bad. */
1857 /* Pass friendly classes back. */
1858 if (TREE_CODE (value
) == VOID_TYPE
)
1859 return void_type_node
;
1861 if (TREE_CODE (value
) == TYPE_DECL
)
1863 cp_error ("cannot declare `%D' to be a bitfield type", value
);
1867 /* Usually, finish_struct_1 catches bitifields with invalid types.
1868 But, in the case of bitfields with function type, we confuse
1869 ourselves into thinking they are member functions, so we must
1871 if (TREE_CODE (value
) == FUNCTION_DECL
)
1873 cp_error ("cannot declare bitfield `%D' with funcion type",
1878 if (DECL_IN_AGGR_P (value
))
1880 cp_error ("`%D' is already defined in the class %T", value
,
1881 DECL_CONTEXT (value
));
1882 return void_type_node
;
1885 GNU_xref_member (current_class_name
, value
);
1887 if (TREE_STATIC (value
))
1889 cp_error ("static member `%D' cannot be a bitfield", value
);
1892 cp_finish_decl (value
, NULL_TREE
, NULL_TREE
, 0);
1894 if (width
!= error_mark_node
)
1896 constant_expression_warning (width
);
1897 DECL_INITIAL (value
) = width
;
1898 SET_DECL_C_BIT_FIELD (value
);
1901 DECL_IN_AGGR_P (value
) = 1;
1906 grokoptypename (declspecs
, declarator
)
1907 tree declspecs
, declarator
;
1909 tree t
= grokdeclarator (declarator
, declspecs
, TYPENAME
, 0, NULL_TREE
);
1911 return mangle_conv_op_name_for_type (t
);
1913 return build_typename_overload (t
);
1916 /* When a function is declared with an initializer,
1917 do the right thing. Currently, there are two possibilities:
1922 // initialization possibility #1.
1923 virtual void f () = 0;
1945 // initialization possibility #2
1952 copy_assignment_arg_p (parmtype
, virtualp
)
1954 int virtualp ATTRIBUTE_UNUSED
;
1956 if (current_class_type
== NULL_TREE
)
1959 if (TREE_CODE (parmtype
) == REFERENCE_TYPE
)
1960 parmtype
= TREE_TYPE (parmtype
);
1962 if ((TYPE_MAIN_VARIANT (parmtype
) == current_class_type
)
1964 /* Non-standard hack to support old Booch components. */
1965 || (! virtualp
&& DERIVED_FROM_P (parmtype
, current_class_type
))
1974 grok_function_init (decl
, init
)
1978 /* An initializer for a function tells how this function should
1980 tree type
= TREE_TYPE (decl
);
1982 if (TREE_CODE (type
) == FUNCTION_TYPE
)
1983 cp_error ("initializer specified for non-member function `%D'", decl
);
1985 /* We'll check for this in finish_struct_1. */
1986 else if (DECL_VINDEX (decl
) == NULL_TREE
)
1987 cp_error ("initializer specified for non-virtual member function `%D'", decl
);
1989 else if (integer_zerop (init
))
1992 /* Mark this function as being "defined". */
1993 DECL_INITIAL (decl
) = error_mark_node
;
1994 /* pure virtual destructors must be defined. */
1995 /* pure virtual needs to be defined (as abort) only when put in
1996 vtbl. For wellformed call, it should be itself. pr4737 */
1997 if (!DECL_DESTRUCTOR_P (decl
)))
1999 /* Give this node rtl from `abort'. */
2000 DECL_RTL (decl
) = DECL_RTL (abort_fndecl
);
2003 DECL_PURE_VIRTUAL_P (decl
) = 1;
2004 if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
2007 = TREE_VALUE (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl
))));
2009 if (copy_assignment_arg_p (parmtype
, 1))
2010 TYPE_HAS_ABSTRACT_ASSIGN_REF (current_class_type
) = 1;
2014 cp_error ("invalid initializer for virtual method `%D'", decl
);
2018 cplus_decl_attributes (decl
, attributes
, prefix_attributes
)
2019 tree decl
, attributes
, prefix_attributes
;
2021 if (decl
== NULL_TREE
|| decl
== void_type_node
)
2024 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
2025 decl
= DECL_TEMPLATE_RESULT (decl
);
2027 decl_attributes (decl
, attributes
, prefix_attributes
);
2029 if (TREE_CODE (decl
) == TYPE_DECL
)
2030 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (decl
), TREE_TYPE (decl
));
2033 /* CONSTRUCTOR_NAME:
2034 Return the name for the constructor (or destructor) for the
2035 specified class. Argument can be RECORD_TYPE, TYPE_DECL, or
2036 IDENTIFIER_NODE. When given a template, this routine doesn't
2037 lose the specialization. */
2040 constructor_name_full (thing
)
2043 if (TREE_CODE (thing
) == TEMPLATE_TYPE_PARM
2044 || TREE_CODE (thing
) == TEMPLATE_TEMPLATE_PARM
2045 || TREE_CODE (thing
) == TYPENAME_TYPE
)
2046 thing
= TYPE_NAME (thing
);
2047 else if (IS_AGGR_TYPE_CODE (TREE_CODE (thing
)))
2049 if (TYPE_WAS_ANONYMOUS (thing
) && TYPE_HAS_CONSTRUCTOR (thing
))
2050 thing
= DECL_NAME (OVL_CURRENT (TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (thing
), 0)));
2052 thing
= TYPE_NAME (thing
);
2054 if (TREE_CODE (thing
) == TYPE_DECL
2055 || (TREE_CODE (thing
) == TEMPLATE_DECL
2056 && TREE_CODE (DECL_TEMPLATE_RESULT (thing
)) == TYPE_DECL
))
2057 thing
= DECL_NAME (thing
);
2058 my_friendly_assert (TREE_CODE (thing
) == IDENTIFIER_NODE
, 197);
2062 /* CONSTRUCTOR_NAME:
2063 Return the name for the constructor (or destructor) for the
2064 specified class. Argument can be RECORD_TYPE, TYPE_DECL, or
2065 IDENTIFIER_NODE. When given a template, return the plain
2066 unspecialized name. */
2069 constructor_name (thing
)
2073 thing
= constructor_name_full (thing
);
2074 t
= IDENTIFIER_TEMPLATE (thing
);
2080 /* Defer the compilation of the FN until the end of compilation. */
2086 if (DECL_DEFERRED_FN (fn
))
2088 DECL_DEFERRED_FN (fn
) = 1;
2090 VARRAY_TREE_INIT (deferred_fns
, 32, "deferred_fns");
2092 VARRAY_PUSH_TREE (deferred_fns
, fn
);
2095 /* Hand off a unique name which can be used for variable we don't really
2096 want to know about anyway, for example, the anonymous variables which
2097 are needed to make references work. Declare this thing so we can use it.
2098 The variable created will be of type TYPE.
2100 STATICP is nonzero if this variable should be static. */
2103 get_temp_name (type
, staticp
)
2107 char buf
[sizeof (AUTO_TEMP_FORMAT
) + 20];
2109 int toplev
= toplevel_bindings_p ();
2111 if (toplev
|| staticp
)
2113 sprintf (buf
, AUTO_TEMP_FORMAT
, global_temp_name_counter
++);
2114 decl
= pushdecl_top_level (build_decl (VAR_DECL
, get_identifier (buf
), type
));
2118 sprintf (buf
, AUTO_TEMP_FORMAT
, temp_name_counter
++);
2119 decl
= pushdecl (build_decl (VAR_DECL
, get_identifier (buf
), type
));
2121 TREE_USED (decl
) = 1;
2122 TREE_STATIC (decl
) = staticp
;
2123 DECL_ARTIFICIAL (decl
) = 1;
2125 /* If this is a local variable, then lay out its rtl now.
2126 Otherwise, callers of this function are responsible for dealing
2127 with this variable's rtl. */
2131 my_friendly_assert (DECL_INITIAL (decl
) == NULL_TREE
,
2138 /* Hunts through the global anonymous union ANON_DECL, building
2139 appropriate VAR_DECLs. Stores cleanups on the list of ELEMS, and
2140 returns a VAR_DECL whose size is the same as the size of the
2141 ANON_DECL, if one is available. */
2144 build_anon_union_vars (anon_decl
, elems
, static_p
, external_p
)
2150 tree type
= TREE_TYPE (anon_decl
);
2151 tree main_decl
= NULL_TREE
;
2154 /* Rather than write the code to handle the non-union case,
2155 just give an error. */
2156 if (TREE_CODE (type
) != UNION_TYPE
)
2157 error ("anonymous struct not inside named type");
2159 for (field
= TYPE_FIELDS (type
);
2161 field
= TREE_CHAIN (field
))
2165 if (DECL_ARTIFICIAL (field
))
2167 if (TREE_CODE (field
) != FIELD_DECL
)
2169 cp_pedwarn_at ("`%#D' invalid; an anonymous union can only have non-static data members",
2174 if (TREE_PRIVATE (field
))
2175 cp_pedwarn_at ("private member `%#D' in anonymous union", field
);
2176 else if (TREE_PROTECTED (field
))
2177 cp_pedwarn_at ("protected member `%#D' in anonymous union", field
);
2179 if (DECL_NAME (field
) == NULL_TREE
2180 && ANON_AGGR_TYPE_P (TREE_TYPE (field
)))
2182 decl
= build_anon_union_vars (field
, elems
, static_p
, external_p
);
2186 else if (DECL_NAME (field
) == NULL_TREE
)
2190 decl
= build_decl (VAR_DECL
, DECL_NAME (field
), TREE_TYPE (field
));
2191 /* tell `pushdecl' that this is not tentative. */
2192 DECL_INITIAL (decl
) = error_mark_node
;
2193 TREE_PUBLIC (decl
) = 0;
2194 TREE_STATIC (decl
) = static_p
;
2195 DECL_EXTERNAL (decl
) = external_p
;
2196 decl
= pushdecl (decl
);
2197 DECL_INITIAL (decl
) = NULL_TREE
;
2200 /* Only write out one anon union element--choose the one that
2201 can hold them all. */
2202 if (main_decl
== NULL_TREE
2203 && simple_cst_equal (DECL_SIZE (decl
),
2204 DECL_SIZE (anon_decl
)) == 1)
2207 /* ??? This causes there to be no debug info written out
2209 TREE_ASM_WRITTEN (decl
) = 1;
2211 if (DECL_NAME (field
) == NULL_TREE
2212 && ANON_AGGR_TYPE_P (TREE_TYPE (field
)))
2213 /* The remainder of the processing was already done in the
2217 /* If there's a cleanup to do, it belongs in the
2218 TREE_PURPOSE of the following TREE_LIST. */
2219 *elems
= tree_cons (NULL_TREE
, decl
, *elems
);
2220 TREE_TYPE (*elems
) = type
;
2226 /* Finish off the processing of a UNION_TYPE structure.
2227 If there are static members, then all members are
2228 static, and must be laid out together. If the
2229 union is an anonymous union, we arrange for that
2230 as well. PUBLIC_P is nonzero if this union is
2231 not declared static. */
2234 finish_anon_union (anon_union_decl
)
2235 tree anon_union_decl
;
2237 tree type
= TREE_TYPE (anon_union_decl
);
2239 int public_p
= TREE_PUBLIC (anon_union_decl
);
2240 int static_p
= TREE_STATIC (anon_union_decl
);
2241 int external_p
= DECL_EXTERNAL (anon_union_decl
);
2243 if (TYPE_FIELDS (type
) == NULL_TREE
)
2248 error ("namespace-scope anonymous aggregates must be static");
2252 main_decl
= build_anon_union_vars (anon_union_decl
,
2253 &DECL_ANON_UNION_ELEMS (anon_union_decl
),
2254 static_p
, external_p
);
2256 if (main_decl
== NULL_TREE
)
2258 warning ("anonymous aggregate with no members");
2264 make_decl_rtl (main_decl
, 0, toplevel_bindings_p ());
2265 DECL_RTL (anon_union_decl
) = DECL_RTL (main_decl
);
2266 expand_anon_union_decl (anon_union_decl
,
2268 DECL_ANON_UNION_ELEMS (anon_union_decl
));
2271 add_decl_stmt (anon_union_decl
);
2274 /* Finish processing a builtin type TYPE. It's name is NAME,
2275 its fields are in the array FIELDS. LEN is the number of elements
2276 in FIELDS minus one, or put another way, it is the maximum subscript
2279 It is given the same alignment as ALIGN_TYPE. */
2282 finish_builtin_type (type
, name
, fields
, len
, align_type
)
2291 TYPE_FIELDS (type
) = fields
[0];
2292 for (i
= 0; i
< len
; i
++)
2294 layout_type (TREE_TYPE (fields
[i
]));
2295 DECL_FIELD_CONTEXT (fields
[i
]) = type
;
2296 TREE_CHAIN (fields
[i
]) = fields
[i
+1];
2298 DECL_FIELD_CONTEXT (fields
[i
]) = type
;
2299 TYPE_ALIGN (type
) = TYPE_ALIGN (align_type
);
2301 #if 0 /* not yet, should get fixed properly later */
2302 TYPE_NAME (type
) = make_type_decl (get_identifier (name
), type
);
2304 TYPE_NAME (type
) = build_decl (TYPE_DECL
, get_identifier (name
), type
);
2306 TYPE_STUB_DECL (type
) = TYPE_NAME (type
);
2307 layout_decl (TYPE_NAME (type
), 0);
2310 /* Auxiliary functions to make type signatures for
2311 `operator new' and `operator delete' correspond to
2312 what compiler will be expecting. */
2315 coerce_new_type (type
)
2320 if (TREE_CODE (type
) == METHOD_TYPE
)
2321 type
= build_function_type (TREE_TYPE (type
), TREE_CHAIN (TYPE_ARG_TYPES (type
)));
2322 if (! same_type_p (TREE_TYPE (type
), ptr_type_node
))
2323 e1
= 1, error ("`operator new' must return type `void *'");
2325 /* Technically the type must be `size_t', but we may not know
2327 if (TYPE_ARG_TYPES (type
) == NULL_TREE
)
2328 e1
= 1, error ("`operator new' takes type `size_t' parameter");
2329 else if (! same_type_p (TREE_VALUE (TYPE_ARG_TYPES (type
)), sizetype
))
2330 e2
= 1, error ("`operator new' takes type `size_t' as first parameter");
2332 type
= build_function_type (ptr_type_node
, tree_cons (NULL_TREE
, sizetype
, TREE_CHAIN (TYPE_ARG_TYPES (type
))));
2334 type
= build_function_type (ptr_type_node
, TYPE_ARG_TYPES (type
));
2339 coerce_delete_type (type
)
2346 tree arg_types
= TYPE_ARG_TYPES (type
);
2348 if (TREE_CODE (type
) == METHOD_TYPE
)
2350 type
= build_function_type (TREE_TYPE (type
), TREE_CHAIN (arg_types
));
2351 arg_types
= TREE_CHAIN (arg_types
);
2354 if (TREE_TYPE (type
) != void_type_node
)
2355 e1
= 1, error ("`operator delete' must return type `void'");
2357 if (arg_types
== NULL_TREE
2358 || ! same_type_p (TREE_VALUE (arg_types
), ptr_type_node
))
2359 e2
= 1, error ("`operator delete' takes type `void *' as first parameter");
2363 && TREE_CHAIN (arg_types
)
2364 && TREE_CHAIN (arg_types
) != void_list_node
)
2366 /* Again, technically this argument must be `size_t', but again
2367 we may not know what that is. */
2368 tree t2
= TREE_VALUE (TREE_CHAIN (arg_types
));
2369 if (! same_type_p (t2
, sizetype
))
2370 e3
= 1, error ("second argument to `operator delete' must be of type `size_t'");
2371 else if (TREE_CHAIN (TREE_CHAIN (arg_types
)) != void_list_node
)
2374 if (TREE_CHAIN (TREE_CHAIN (arg_types
)))
2375 error ("too many arguments in declaration of `operator delete'");
2377 error ("`...' invalid in specification of `operator delete'");
2382 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
,
2383 build_tree_list (NULL_TREE
, sizetype
));
2386 if (arg_types
== NULL_TREE
)
2387 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
2389 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, TREE_CHAIN (arg_types
));
2395 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
,
2396 arg_types
? TREE_CHAIN (arg_types
): NULL_TREE
);
2398 type
= build_function_type (void_type_node
, arg_types
);
2404 mark_vtable_entries (decl
)
2407 tree entries
= CONSTRUCTOR_ELTS (DECL_INITIAL (decl
));
2409 for (; entries
; entries
= TREE_CHAIN (entries
))
2414 fnaddr
= (flag_vtable_thunks
? TREE_VALUE (entries
)
2415 : FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (entries
)));
2417 if (TREE_CODE (fnaddr
) != ADDR_EXPR
)
2418 /* This entry is an offset: a virtual base class offset, a
2419 virtual call offset, and RTTI offset, etc. */
2422 fn
= TREE_OPERAND (fnaddr
, 0);
2423 TREE_ADDRESSABLE (fn
) = 1;
2424 if (DECL_THUNK_P (fn
) && DECL_EXTERNAL (fn
))
2426 DECL_EXTERNAL (fn
) = 0;
2433 /* Set DECL up to have the closest approximation of "initialized common"
2434 linkage available. */
2437 comdat_linkage (decl
)
2441 make_decl_one_only (decl
);
2442 else if (TREE_CODE (decl
) == FUNCTION_DECL
|| DECL_VIRTUAL_P (decl
))
2443 /* We can just emit functions and vtables statically; it doesn't really
2444 matter if we have multiple copies. */
2445 TREE_PUBLIC (decl
) = 0;
2448 /* Static data member template instantiations, however, cannot
2449 have multiple copies. */
2450 if (DECL_INITIAL (decl
) == 0
2451 || DECL_INITIAL (decl
) == error_mark_node
)
2452 DECL_COMMON (decl
) = 1;
2453 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
)))
2455 DECL_COMMON (decl
) = 1;
2456 DECL_INITIAL (decl
) = error_mark_node
;
2460 /* We can't do anything useful; leave vars for explicit
2462 DECL_EXTERNAL (decl
) = 1;
2463 DECL_NOT_REALLY_EXTERN (decl
) = 0;
2467 if (DECL_LANG_SPECIFIC (decl
))
2468 DECL_COMDAT (decl
) = 1;
2471 /* For win32 we also want to put explicit instantiations in
2472 linkonce sections, so that they will be merged with implicit
2473 instantiations; otherwise we get duplicate symbol errors. */
2476 maybe_make_one_only (decl
)
2479 /* We used to say that this was not necessary on targets that support weak
2480 symbols, because the implicit instantiations will defer to the explicit
2481 one. However, that's not actually the case in SVR4; a strong definition
2482 after a weak one is an error. Also, not making explicit
2483 instantiations one_only means that we can end up with two copies of
2484 some template instantiations. */
2485 if (! supports_one_only ())
2488 /* We can't set DECL_COMDAT on functions, or finish_file will think
2489 we can get away with not emitting them if they aren't used. We need
2490 to for variables so that cp_finish_decl will update their linkage,
2491 because their DECL_INITIAL may not have been set properly yet. */
2493 make_decl_one_only (decl
);
2495 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_LANG_SPECIFIC (decl
))
2496 DECL_COMDAT (decl
) = 1;
2499 /* Returns the virtual function with which the vtable for TYPE is
2500 emitted, or NULL_TREE if that heuristic is not applicable to TYPE. */
2508 if (TYPE_FOR_JAVA (type
)
2509 || CLASSTYPE_TEMPLATE_INSTANTIATION (type
)
2510 || CLASSTYPE_INTERFACE_KNOWN (type
))
2513 for (method
= TYPE_METHODS (type
); method
!= NULL_TREE
;
2514 method
= TREE_CHAIN (method
))
2515 if (DECL_VINDEX (method
) != NULL_TREE
2516 && ! DECL_THIS_INLINE (method
)
2517 && ! DECL_PURE_VIRTUAL_P (method
))
2523 /* Set TREE_PUBLIC and/or DECL_EXTERN on the vtable DECL,
2524 based on TYPE and other static flags.
2526 Note that anything public is tagged TREE_PUBLIC, whether
2527 it's public in this file or in another one. */
2530 import_export_vtable (decl
, type
, final
)
2534 if (DECL_INTERFACE_KNOWN (decl
))
2537 if (TYPE_FOR_JAVA (type
))
2539 TREE_PUBLIC (decl
) = 1;
2540 DECL_EXTERNAL (decl
) = 1;
2541 DECL_INTERFACE_KNOWN (decl
) = 1;
2543 else if (CLASSTYPE_INTERFACE_KNOWN (type
))
2545 TREE_PUBLIC (decl
) = 1;
2546 DECL_EXTERNAL (decl
) = ! CLASSTYPE_VTABLE_NEEDS_WRITING (type
);
2547 DECL_INTERFACE_KNOWN (decl
) = 1;
2551 /* We can only wait to decide if we have real non-inline virtual
2552 functions in our class, or if we come from a template. */
2554 int found
= (CLASSTYPE_TEMPLATE_INSTANTIATION (type
)
2555 || key_method (type
));
2557 if (final
|| ! found
)
2559 comdat_linkage (decl
);
2560 DECL_EXTERNAL (decl
) = 0;
2564 TREE_PUBLIC (decl
) = 1;
2565 DECL_EXTERNAL (decl
) = 1;
2570 /* Determine whether or not we want to specifically import or export CTYPE,
2571 using various heuristics. */
2574 import_export_class (ctype
)
2577 /* -1 for imported, 1 for exported. */
2578 int import_export
= 0;
2580 /* It only makes sense to call this function at EOF. The reason is
2581 that this function looks at whether or not the first non-inline
2582 non-abstract virtual member function has been defined in this
2583 translation unit. But, we can't possibly know that until we've
2584 seen the entire translation unit. */
2585 my_friendly_assert (at_eof
, 20000226);
2587 if (CLASSTYPE_INTERFACE_KNOWN (ctype
))
2590 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma interface,
2591 we will have CLASSTYPE_INTERFACE_ONLY set but not
2592 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
2593 heuristic because someone will supply a #pragma implementation
2594 elsewhere, and deducing it here would produce a conflict. */
2595 if (CLASSTYPE_INTERFACE_ONLY (ctype
))
2598 #ifdef VALID_MACHINE_TYPE_ATTRIBUTE
2599 /* FIXME this should really use some sort of target-independent macro. */
2600 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype
)))
2602 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype
)))
2606 /* If we got -fno-implicit-templates, we import template classes that
2607 weren't explicitly instantiated. */
2608 if (import_export
== 0
2609 && CLASSTYPE_IMPLICIT_INSTANTIATION (ctype
)
2610 && ! flag_implicit_templates
)
2613 /* Base our import/export status on that of the first non-inline,
2614 non-pure virtual function, if any. */
2615 if (import_export
== 0
2616 && TYPE_POLYMORPHIC_P (ctype
))
2618 tree method
= key_method (ctype
);
2620 import_export
= (DECL_REALLY_EXTERN (method
) ? -1 : 1);
2623 #ifdef MULTIPLE_SYMBOL_SPACES
2624 if (import_export
== -1)
2630 SET_CLASSTYPE_INTERFACE_KNOWN (ctype
);
2631 CLASSTYPE_VTABLE_NEEDS_WRITING (ctype
) = (import_export
> 0);
2632 CLASSTYPE_INTERFACE_ONLY (ctype
) = (import_export
< 0);
2636 /* We need to describe to the assembler the relationship between
2637 a vtable and the vtable of the parent class. */
2640 output_vtable_inherit (vars
)
2646 op
[0] = XEXP (DECL_RTL (vars
), 0); /* strip the mem ref */
2648 parent
= binfo_for_vtable (vars
);
2650 if (parent
== TYPE_BINFO (DECL_CONTEXT (vars
)))
2654 parent
= get_vtbl_decl_for_binfo (TYPE_BINFO (BINFO_TYPE (parent
)));
2655 op
[1] = XEXP (DECL_RTL (parent
), 0); /* strip the mem ref */
2658 my_friendly_abort (980826);
2660 output_asm_insn (".vtable_inherit %c0, %c1", op
);
2664 finish_vtable_vardecl (t
, data
)
2666 void *data ATTRIBUTE_UNUSED
;
2669 tree ctype
= DECL_CONTEXT (vars
);
2670 import_export_class (ctype
);
2671 import_export_vtable (vars
, ctype
, 1);
2673 if (! DECL_EXTERNAL (vars
)
2674 && DECL_NEEDED_P (vars
)
2675 && ! TREE_ASM_WRITTEN (vars
))
2677 if (TREE_TYPE (vars
) == void_type_node
)
2678 /* It is a dummy vtable made by get_vtable_decl. Ignore it. */
2682 mark_vtable_entries (vars
);
2683 if (TREE_TYPE (DECL_INITIAL (vars
)) == 0)
2684 store_init_value (vars
, DECL_INITIAL (vars
));
2686 if (write_symbols
== DWARF_DEBUG
|| write_symbols
== DWARF2_DEBUG
)
2688 /* Mark the VAR_DECL node representing the vtable itself as a
2689 "gratuitous" one, thereby forcing dwarfout.c to ignore it.
2690 It is rather important that such things be ignored because
2691 any effort to actually generate DWARF for them will run
2692 into trouble when/if we encounter code like:
2695 struct S { virtual void member (); };
2697 because the artificial declaration of the vtable itself (as
2698 manufactured by the g++ front end) will say that the vtable
2699 is a static member of `S' but only *after* the debug output
2700 for the definition of `S' has already been output. This causes
2701 grief because the DWARF entry for the definition of the vtable
2702 will try to refer back to an earlier *declaration* of the
2703 vtable as a static member of `S' and there won't be one.
2704 We might be able to arrange to have the "vtable static member"
2705 attached to the member list for `S' before the debug info for
2706 `S' get written (which would solve the problem) but that would
2707 require more intrusive changes to the g++ front end. */
2709 DECL_IGNORED_P (vars
) = 1;
2712 /* Always make vtables weak. */
2714 comdat_linkage (vars
);
2716 rest_of_decl_compilation (vars
, NULL_PTR
, 1, 1);
2719 output_vtable_inherit (vars
);
2721 /* Because we're only doing syntax-checking, we'll never end up
2722 actually marking the variable as written. */
2723 if (flag_syntax_only
)
2724 TREE_ASM_WRITTEN (vars
) = 1;
2726 /* Since we're writing out the vtable here, also write the debug
2728 note_debug_info_needed (ctype
);
2733 /* If the references to this class' vtables were optimized away, still
2734 emit the appropriate debugging information. See dfs_debug_mark. */
2735 if (DECL_COMDAT (vars
)
2736 && CLASSTYPE_DEBUG_REQUESTED (ctype
))
2737 note_debug_info_needed (ctype
);
2743 prune_vtable_vardecl (t
, data
)
2745 void *data ATTRIBUTE_UNUSED
;
2747 *t
= TREE_CHAIN (*t
);
2751 /* Determines the proper settings of TREE_PUBLIC and DECL_EXTERNAL for an
2752 inline function or template instantiation at end-of-file. */
2755 import_export_decl (decl
)
2758 if (DECL_INTERFACE_KNOWN (decl
))
2761 if (DECL_TEMPLATE_INSTANTIATION (decl
)
2762 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl
))
2764 DECL_NOT_REALLY_EXTERN (decl
) = 1;
2765 if ((DECL_IMPLICIT_INSTANTIATION (decl
)
2766 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl
))
2767 && (flag_implicit_templates
2768 || (flag_implicit_inline_templates
&& DECL_THIS_INLINE (decl
))))
2770 if (!TREE_PUBLIC (decl
))
2771 /* Templates are allowed to have internal linkage. See
2775 comdat_linkage (decl
);
2778 DECL_NOT_REALLY_EXTERN (decl
) = 0;
2780 else if (DECL_FUNCTION_MEMBER_P (decl
))
2782 tree ctype
= DECL_CONTEXT (decl
);
2783 import_export_class (ctype
);
2784 if (CLASSTYPE_INTERFACE_KNOWN (ctype
)
2786 ? (! DECL_THIS_INLINE (decl
))
2787 : (! DECL_ARTIFICIAL (decl
) || DECL_VINDEX (decl
))))
2789 DECL_NOT_REALLY_EXTERN (decl
)
2790 = ! (CLASSTYPE_INTERFACE_ONLY (ctype
)
2791 || (DECL_THIS_INLINE (decl
) && ! flag_implement_inlines
2792 && !DECL_VINDEX (decl
)));
2794 /* Always make artificials weak. */
2795 if (DECL_ARTIFICIAL (decl
) && flag_weak
)
2796 comdat_linkage (decl
);
2798 maybe_make_one_only (decl
);
2801 comdat_linkage (decl
);
2803 else if (DECL_TINFO_FN_P (decl
))
2805 tree ctype
= TREE_TYPE (DECL_NAME (decl
));
2807 if (IS_AGGR_TYPE (ctype
))
2808 import_export_class (ctype
);
2810 if (IS_AGGR_TYPE (ctype
) && CLASSTYPE_INTERFACE_KNOWN (ctype
)
2811 && TYPE_POLYMORPHIC_P (ctype
)
2812 /* If -fno-rtti, we're not necessarily emitting this stuff with
2813 the class, so go ahead and emit it now. This can happen
2814 when a class is used in exception handling. */
2816 /* If the type is a cv-qualified variant of a type, then we
2817 must emit the tinfo function in this translation unit
2818 since it will not be emitted when the vtable for the type
2819 is output (which is when the unqualified version is
2821 && same_type_p (ctype
, TYPE_MAIN_VARIANT (ctype
)))
2823 DECL_NOT_REALLY_EXTERN (decl
)
2824 = ! (CLASSTYPE_INTERFACE_ONLY (ctype
)
2825 || (DECL_THIS_INLINE (decl
) && ! flag_implement_inlines
2826 && !DECL_VINDEX (decl
)));
2828 /* Always make artificials weak. */
2830 comdat_linkage (decl
);
2832 else if (TYPE_BUILT_IN (ctype
)
2833 && same_type_p (ctype
, TYPE_MAIN_VARIANT (ctype
)))
2834 DECL_NOT_REALLY_EXTERN (decl
) = 0;
2836 comdat_linkage (decl
);
2839 comdat_linkage (decl
);
2841 DECL_INTERFACE_KNOWN (decl
) = 1;
2845 build_cleanup (decl
)
2849 tree type
= TREE_TYPE (decl
);
2851 if (TREE_CODE (type
) == ARRAY_TYPE
)
2855 mark_addressable (decl
);
2856 temp
= build1 (ADDR_EXPR
, build_pointer_type (type
), decl
);
2858 temp
= build_delete (TREE_TYPE (temp
), temp
,
2859 sfk_complete_destructor
,
2860 LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
, 0);
2864 /* Returns the initialization guard variable for the non-local
2875 sname
= get_id_2 ("__sn", DECL_ASSEMBLER_NAME (decl
));
2877 sname
= mangle_guard_variable (decl
);
2879 /* For struct X foo __attribute__((weak)), there is a counter
2880 __snfoo. Since base is already an assembler name, sname should
2881 be globally unique */
2882 sentry
= IDENTIFIER_GLOBAL_VALUE (sname
);
2885 sentry
= build_decl (VAR_DECL
, sname
, integer_type_node
);
2886 TREE_PUBLIC (sentry
) = 1;
2887 DECL_ARTIFICIAL (sentry
) = 1;
2888 TREE_STATIC (sentry
) = 1;
2889 TREE_USED (sentry
) = 1;
2890 DECL_COMMON (sentry
) = 1;
2891 pushdecl_top_level (sentry
);
2892 cp_finish_decl (sentry
, NULL_TREE
, NULL_TREE
, 0);
2897 /* Start the process of running a particular set of global constructors
2898 or destructors. Subroutine of do_[cd]tors. */
2901 start_objects (method_type
, initp
)
2902 int method_type
, initp
;
2908 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2910 if (initp
!= DEFAULT_INIT_PRIORITY
)
2920 sprintf (type
, "%c%c%.5u", method_type
, joiner
, initp
);
2923 sprintf (type
, "%c", method_type
);
2925 fnname
= get_file_function_name_long (type
);
2927 start_function (void_list_node
,
2928 make_call_declarator (fnname
, void_list_node
, NULL_TREE
,
2930 NULL_TREE
, SF_DEFAULT
);
2932 #if defined(ASM_OUTPUT_CONSTRUCTOR) && defined(ASM_OUTPUT_DESTRUCTOR)
2933 /* It can be a static function as long as collect2 does not have
2934 to scan the object file to find its ctor/dtor routine. */
2935 TREE_PUBLIC (current_function_decl
) = 0;
2938 /* Mark this declaration as used to avoid spurious warnings. */
2939 TREE_USED (current_function_decl
) = 1;
2941 /* Mark this function as a global constructor or destructor. */
2942 if (method_type
== 'I')
2943 DECL_GLOBAL_CTOR_P (current_function_decl
) = 1;
2945 DECL_GLOBAL_DTOR_P (current_function_decl
) = 1;
2946 GLOBAL_INIT_PRIORITY (current_function_decl
) = initp
;
2948 body
= begin_compound_stmt (/*has_no_scope=*/0);
2950 /* We cannot allow these functions to be elided, even if they do not
2951 have external linkage. And, there's no point in deferring
2952 copmilation of thes functions; they're all going to have to be
2954 current_function_cannot_inline
2955 = "static constructors and destructors cannot be inlined";
2960 /* Finish the process of running a particular set of global constructors
2961 or destructors. Subroutine of do_[cd]tors. */
2964 finish_objects (method_type
, initp
, body
)
2965 int method_type
, initp
;
2972 finish_compound_stmt(/*has_no_scope=*/0, body
);
2973 fn
= finish_function (0);
2976 /* When only doing semantic analysis, and no RTL generation, we
2977 can't call functions that directly emit assembly code; there is
2978 no assembly file in which to put the code. */
2979 if (flag_syntax_only
)
2982 fnname
= XSTR (XEXP (DECL_RTL (fn
), 0), 0);
2983 if (initp
== DEFAULT_INIT_PRIORITY
)
2985 if (method_type
== 'I')
2986 assemble_constructor (fnname
);
2988 assemble_destructor (fnname
);
2990 #if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
2991 /* If we're using init priority we can't use assemble_*tor, but on ELF
2992 targets we can stick the references into named sections for GNU ld
2997 sprintf (buf
, ".%ctors.%.5u", method_type
== 'I' ? 'c' : 'd',
2998 /* invert the numbering so the linker puts us in the proper
2999 order; constructors are run from right to left, and the
3000 linker sorts in increasing order. */
3001 MAX_INIT_PRIORITY
- initp
);
3002 named_section (NULL_TREE
, buf
, 0);
3003 assemble_integer (gen_rtx_SYMBOL_REF (Pmode
, fnname
),
3004 POINTER_SIZE
/ BITS_PER_UNIT
, 1);
3009 /* The names of the parameters to the function created to handle
3010 initializations and destructions for objects with static storage
3012 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
3013 #define PRIORITY_IDENTIFIER "__priority"
3015 /* The name of the function we create to handle initializations and
3016 destructions for objects with static storage duration. */
3017 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
3019 /* The declaration for the __INITIALIZE_P argument. */
3020 static tree initialize_p_decl
;
3022 /* The declaration for the __PRIORITY argument. */
3023 static tree priority_decl
;
3025 /* The declaration for the static storage duration function. */
3026 static tree ssdf_decl
;
3028 /* All the static storage duration functions created in this
3029 translation unit. */
3030 static varray_type ssdf_decls
;
3032 /* A map from priority levels to information about that priority
3033 level. There may be many such levels, so efficient lookup is
3035 static splay_tree priority_info_map
;
3037 /* Begins the generation of the function that will handle all
3038 initialization and destruction of objects with static storage
3039 duration. The function generated takes two parameters of type
3040 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
3041 non-zero, it performs initializations. Otherwise, it performs
3042 destructions. It only performs those initializations or
3043 destructions with the indicated __PRIORITY. The generated function
3046 It is assumed that this function will only be called once per
3047 translation unit. */
3050 start_static_storage_duration_function ()
3052 static unsigned ssdf_number
;
3057 char id
[sizeof (SSDF_IDENTIFIER
) + 1 /* '\0' */ + 32];
3059 /* Create the identifier for this function. It will be of the form
3060 SSDF_IDENTIFIER_<number>. */
3061 sprintf (id
, "%s_%u", SSDF_IDENTIFIER
, ssdf_number
++);
3062 if (ssdf_number
== 0)
3064 /* Overflow occurred. That means there are at least 4 billion
3065 initialization functions. */
3066 sorry ("too many initialization functions required");
3067 my_friendly_abort (19990430);
3070 /* Create the parameters. */
3071 parm_types
= void_list_node
;
3072 parm_types
= tree_cons (NULL_TREE
, integer_type_node
, parm_types
);
3073 parm_types
= tree_cons (NULL_TREE
, integer_type_node
, parm_types
);
3074 type
= build_function_type (void_type_node
, parm_types
);
3076 /* Create the FUNCTION_DECL itself. */
3077 ssdf_decl
= build_lang_decl (FUNCTION_DECL
,
3078 get_identifier (id
),
3080 TREE_PUBLIC (ssdf_decl
) = 0;
3081 DECL_ARTIFICIAL (ssdf_decl
) = 1;
3083 /* Put this function in the list of functions to be called from the
3084 static constructors and destructors. */
3087 VARRAY_TREE_INIT (ssdf_decls
, 32, "ssdf_decls");
3089 /* Take this opportunity to initialize the map from priority
3090 numbers to information about that priority level. */
3091 priority_info_map
= splay_tree_new (splay_tree_compare_ints
,
3092 /*delete_key_fn=*/0,
3093 /*delete_value_fn=*/
3094 (splay_tree_delete_value_fn
) &free
);
3096 /* We always need to generate functions for the
3097 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
3098 priorities later, we'll be sure to find the
3099 DEFAULT_INIT_PRIORITY. */
3100 get_priority_info (DEFAULT_INIT_PRIORITY
);
3103 VARRAY_PUSH_TREE (ssdf_decls
, ssdf_decl
);
3105 /* Create the argument list. */
3106 initialize_p_decl
= build_decl (PARM_DECL
,
3107 get_identifier (INITIALIZE_P_IDENTIFIER
),
3109 DECL_CONTEXT (initialize_p_decl
) = ssdf_decl
;
3110 DECL_ARG_TYPE (initialize_p_decl
) = integer_type_node
;
3111 TREE_USED (initialize_p_decl
) = 1;
3112 priority_decl
= build_decl (PARM_DECL
, get_identifier (PRIORITY_IDENTIFIER
),
3114 DECL_CONTEXT (priority_decl
) = ssdf_decl
;
3115 DECL_ARG_TYPE (priority_decl
) = integer_type_node
;
3116 TREE_USED (priority_decl
) = 1;
3118 TREE_CHAIN (initialize_p_decl
) = priority_decl
;
3119 DECL_ARGUMENTS (ssdf_decl
) = initialize_p_decl
;
3121 /* Put the function in the global scope. */
3122 pushdecl (ssdf_decl
);
3124 /* Start the function itself. This is equivalent to declarating the
3127 static void __ssdf (int __initialize_p, init __priority_p);
3129 It is static because we only need to call this function from the
3130 various constructor and destructor functions for this module. */
3131 start_function (/*specs=*/NULL_TREE
,
3133 /*attrs=*/NULL_TREE
,
3136 /* Set up the scope of the outermost block in the function. */
3137 body
= begin_compound_stmt (/*has_no_scope=*/0);
3139 /* This function must not be deferred because we are depending on
3140 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
3141 current_function_cannot_inline
3142 = "static storage duration functions cannot be inlined";
3147 /* Finish the generation of the function which performs initialization
3148 and destruction of objects with static storage duration. After
3149 this point, no more such objects can be created. */
3152 finish_static_storage_duration_function (body
)
3155 /* Close out the function. */
3156 finish_compound_stmt (/*has_no_scope=*/0, body
);
3157 expand_body (finish_function (0));
3160 /* Return the information about the indicated PRIORITY level. If no
3161 code to handle this level has yet been generated, generate the
3162 appropriate prologue. */
3164 static priority_info
3165 get_priority_info (priority
)
3171 n
= splay_tree_lookup (priority_info_map
,
3172 (splay_tree_key
) priority
);
3175 /* Create a new priority information structure, and insert it
3177 pi
= (priority_info
) xmalloc (sizeof (struct priority_info_s
));
3178 pi
->initializations_p
= 0;
3179 pi
->destructions_p
= 0;
3180 splay_tree_insert (priority_info_map
,
3181 (splay_tree_key
) priority
,
3182 (splay_tree_value
) pi
);
3185 pi
= (priority_info
) n
->value
;
3190 /* Set up to handle the initialization or destruction of DECL. If
3191 INITP is non-zero, we are initializing the variable. Otherwise, we
3192 are destroying it. */
3195 start_static_initialization_or_destruction (decl
, initp
)
3199 tree sentry_if_stmt
= NULL_TREE
;
3205 /* Figure out the priority for this declaration. */
3206 priority
= DECL_INIT_PRIORITY (decl
);
3208 priority
= DEFAULT_INIT_PRIORITY
;
3210 /* Remember that we had an initialization or finalization at this
3212 pi
= get_priority_info (priority
);
3214 pi
->initializations_p
= 1;
3216 pi
->destructions_p
= 1;
3218 /* Trick the compiler into thinking we are at the file and line
3219 where DECL was declared so that error-messages make sense, and so
3220 that the debugger will show somewhat sensible file and line
3222 input_filename
= DECL_SOURCE_FILE (decl
);
3223 lineno
= DECL_SOURCE_LINE (decl
);
3229 Access control for implicit calls to the constructors,
3230 the conversion functions, or the destructor called to
3231 create and destroy a static data member is performed as
3232 if these calls appeared in the scope of the member's
3235 we pretend we are in a static member function of the class of
3236 which the DECL is a member. */
3237 if (member_p (decl
))
3239 DECL_CONTEXT (current_function_decl
) = DECL_CONTEXT (decl
);
3240 DECL_STATIC_FUNCTION_P (current_function_decl
) = 1;
3243 /* Conditionalize this initialization on being in the right priority
3244 and being initializing/finalizing appropriately. */
3245 sentry_if_stmt
= begin_if_stmt ();
3246 cond
= build_binary_op (EQ_EXPR
,
3248 build_int_2 (priority
, 0));
3249 init_cond
= initp
? integer_one_node
: integer_zero_node
;
3250 init_cond
= build_binary_op (EQ_EXPR
,
3253 cond
= build_binary_op (TRUTH_ANDIF_EXPR
, cond
, init_cond
);
3255 /* We need a sentry if this is an object with external linkage that
3256 might be initialized in more than one place. (For example, a
3257 static data member of a template, when the data member requires
3259 if (TREE_PUBLIC (decl
) && (DECL_COMMON (decl
)
3260 || DECL_ONE_ONLY (decl
)
3261 || DECL_WEAK (decl
)))
3266 sentry
= get_sentry (decl
);
3268 /* We do initializations only if the SENTRY is zero, i.e., if we
3269 are the first to initialize the variable. We do destructions
3270 only if the SENTRY is one, i.e., if we are the last to
3271 destroy the variable. */
3273 sentry_cond
= build_binary_op (EQ_EXPR
,
3274 build_unary_op (PREINCREMENT_EXPR
,
3279 sentry_cond
= build_binary_op (EQ_EXPR
,
3280 build_unary_op (PREDECREMENT_EXPR
,
3285 cond
= build_binary_op (TRUTH_ANDIF_EXPR
, cond
, sentry_cond
);
3288 finish_if_stmt_cond (cond
, sentry_if_stmt
);
3290 return sentry_if_stmt
;
3293 /* We've just finished generating code to do an initialization or
3294 finalization. SENTRY_IF_STMT is the if-statement we used to guard
3295 the initialization. */
3298 finish_static_initialization_or_destruction (sentry_if_stmt
)
3299 tree sentry_if_stmt
;
3301 finish_then_clause (sentry_if_stmt
);
3304 /* Now that we're done with DECL we don't need to pretend to be a
3305 member of its class any longer. */
3306 DECL_CONTEXT (current_function_decl
) = NULL_TREE
;
3307 DECL_STATIC_FUNCTION_P (current_function_decl
) = 0;
3310 /* Generate code to do the static initialization of DECL. The
3311 initialization is INIT. If DECL may be initialized more than once
3312 in different object files, SENTRY is the guard variable to
3313 check. PRIORITY is the priority for the initialization. */
3316 do_static_initialization (decl
, init
)
3321 tree sentry_if_stmt
;
3323 /* Set up for the initialization. */
3325 = start_static_initialization_or_destruction (decl
,
3328 /* Do the initialization itself. */
3329 if (IS_AGGR_TYPE (TREE_TYPE (decl
))
3330 || TREE_CODE (TREE_TYPE (decl
)) == ARRAY_TYPE
)
3331 expr
= build_aggr_init (decl
, init
, 0);
3332 else if (TREE_CODE (init
) == TREE_VEC
)
3333 expr
= build_vec_init (decl
, TREE_VEC_ELT (init
, 0),
3334 TREE_VEC_ELT (init
, 1),
3335 TREE_VEC_ELT (init
, 2), 0);
3338 expr
= build (INIT_EXPR
, TREE_TYPE (decl
), decl
, init
);
3339 TREE_SIDE_EFFECTS (expr
) = 1;
3341 finish_expr_stmt (expr
);
3343 /* If we're using __cxa_atexit, register a a function that calls the
3344 destructor for the object. */
3345 if (flag_use_cxa_atexit
)
3346 register_dtor_fn (decl
);
3349 finish_static_initialization_or_destruction (sentry_if_stmt
);
3352 /* Generate code to do the static destruction of DECL. If DECL may be
3353 initialized more than once in different object files, SENTRY is the
3354 guard variable to check. PRIORITY is the priority for the
3358 do_static_destruction (decl
)
3361 tree sentry_if_stmt
;
3363 /* If we're using __cxa_atexit, then destructors are registered
3364 immediately after objects are initialized. */
3365 my_friendly_assert (!flag_use_cxa_atexit
, 20000121);
3367 /* If we don't need a destructor, there's nothing to do. */
3368 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
3371 /* Actually do the destruction. */
3372 sentry_if_stmt
= start_static_initialization_or_destruction (decl
,
3374 finish_expr_stmt (build_cleanup (decl
));
3375 finish_static_initialization_or_destruction (sentry_if_stmt
);
3378 /* VARS is a list of variables with static storage duration which may
3379 need initialization and/or finalization. Remove those variables
3380 that don't really need to be initialized or finalized, and return
3381 the resulting list. The order in which the variables appear in
3382 VARS is in reverse order of the order in which they should actually
3383 be initialized. The list we return is in the unreversed order;
3384 i.e., the first variable should be initialized first. */
3387 prune_vars_needing_no_initialization (vars
)
3393 for (var
= vars
, result
= NULL_TREE
;
3395 var
= TREE_CHAIN (var
))
3397 tree decl
= TREE_VALUE (var
);
3398 tree init
= TREE_PURPOSE (var
);
3400 /* Deal gracefully with error. */
3401 if (decl
== error_mark_node
)
3404 /* The only things that can be initialized are variables. */
3405 my_friendly_assert (TREE_CODE (decl
) == VAR_DECL
, 19990420);
3407 /* If this object is not defined, we don't need to do anything
3409 if (DECL_EXTERNAL (decl
))
3412 /* Also, if the initializer already contains errors, we can bail
3414 if (init
&& TREE_CODE (init
) == TREE_LIST
3415 && value_member (error_mark_node
, init
))
3418 /* This variable is going to need initialization and/or
3419 finalization, so we add it to the list. */
3420 result
= tree_cons (init
, decl
, result
);
3426 /* Make sure we have told the back end about all the variables in
3430 write_out_vars (vars
)
3435 for (v
= vars
; v
; v
= TREE_CHAIN (v
))
3436 if (! TREE_ASM_WRITTEN (TREE_VALUE (v
)))
3437 rest_of_decl_compilation (TREE_VALUE (v
), 0, 1, 1);
3440 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
3441 (otherwise) that will initialize all gobal objects with static
3442 storage duration having the indicated PRIORITY. */
3445 generate_ctor_or_dtor_function (constructor_p
, priority
)
3454 /* We use `I' to indicate initialization and `D' to indicate
3461 /* Begin the function. */
3462 body
= start_objects (function_key
, priority
);
3464 /* Call the static storage duration function with appropriate
3466 for (i
= 0; i
< ssdf_decls
->elements_used
; ++i
)
3468 arguments
= tree_cons (NULL_TREE
, build_int_2 (priority
, 0),
3470 arguments
= tree_cons (NULL_TREE
, build_int_2 (constructor_p
, 0),
3472 finish_expr_stmt (build_function_call (VARRAY_TREE (ssdf_decls
, i
),
3476 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
3477 calls to any functions marked with attributes indicating that
3478 they should be called at initialization- or destruction-time. */
3479 if (priority
== DEFAULT_INIT_PRIORITY
)
3483 for (fns
= constructor_p
? static_ctors
: static_dtors
;
3485 fns
= TREE_CHAIN (fns
))
3486 finish_expr_stmt (build_function_call (TREE_VALUE (fns
), NULL_TREE
));
3489 /* Close out the function. */
3490 finish_objects (function_key
, priority
, body
);
3493 /* Generate constructor and destructor functions for the priority
3497 generate_ctor_and_dtor_functions_for_priority (n
, data
)
3499 void *data ATTRIBUTE_UNUSED
;
3501 int priority
= (int) n
->key
;
3502 priority_info pi
= (priority_info
) n
->value
;
3504 /* Generate the functions themselves, but only if they are really
3506 if (pi
->initializations_p
3507 || (priority
== DEFAULT_INIT_PRIORITY
&& static_ctors
))
3508 generate_ctor_or_dtor_function (/*constructor_p=*/1,
3510 if (pi
->destructions_p
3511 || (priority
== DEFAULT_INIT_PRIORITY
&& static_dtors
))
3512 generate_ctor_or_dtor_function (/*constructor_p=*/0,
3515 /* Keep iterating. */
3519 /* This routine is called from the last rule in yyparse ().
3520 Its job is to create all the code needed to initialize and
3521 destroy the global aggregates. We do the destruction
3522 first, since that way we only need to reverse the decls once. */
3533 /* Bad parse errors. Just forget about it. */
3534 if (! global_bindings_p () || current_class_type
|| decl_namespace_list
)
3537 /* Otherwise, GDB can get confused, because in only knows
3538 about source for LINENO-1 lines. */
3541 interface_unknown
= 1;
3544 /* We now have to write out all the stuff we put off writing out.
3547 o Template specializations that we have not yet instantiated,
3548 but which are needed.
3549 o Initialization and destruction for non-local objects with
3550 static storage duration. (Local objects with static storage
3551 duration are initialized when their scope is first entered,
3552 and are cleaned up via atexit.)
3553 o Virtual function tables.
3555 All of these may cause others to be needed. For example,
3556 instantiating one function may cause another to be needed, and
3557 generating the intiailzer for an object may cause templates to be
3558 instantiated, etc., etc. */
3560 timevar_push (TV_VARCONST
);
3562 if (new_abi_rtti_p ())
3563 emit_support_tinfos ();
3569 /* If there are templates that we've put off instantiating, do
3571 instantiate_pending_templates ();
3573 /* Write out virtual tables as required. Note that writing out
3574 the virtual table for a template class may cause the
3575 instantiation of members of that class. */
3576 if (walk_globals (vtable_decl_p
,
3577 finish_vtable_vardecl
,
3581 /* Write out needed type info variables. Writing out one variable
3582 might cause others to be needed. */
3583 if (new_abi_rtti_p ()
3584 && walk_globals (tinfo_decl_p
, emit_tinfo_decl
, /*data=*/0))
3587 /* The list of objects with static storage duration is built up
3588 in reverse order. We clear STATIC_AGGREGATES so that any new
3589 aggregates added during the initialization of these will be
3590 initialized in the correct order when we next come around the
3592 vars
= prune_vars_needing_no_initialization (static_aggregates
);
3593 static_aggregates
= NULL_TREE
;
3599 /* We need to start a new initialization function each time
3600 through the loop. That's because we need to know which
3601 vtables have been referenced, and TREE_SYMBOL_REFERENCED
3602 isn't computed until a function is finished, and written
3603 out. That's a deficiency in the back-end. When this is
3604 fixed, these initialization functions could all become
3605 inline, with resulting performance improvements. */
3606 tree ssdf_body
= start_static_storage_duration_function ();
3608 /* Make sure the back end knows about all the variables. */
3609 write_out_vars (vars
);
3611 /* First generate code to do all the initializations. */
3612 for (v
= vars
; v
; v
= TREE_CHAIN (v
))
3613 do_static_initialization (TREE_VALUE (v
),
3616 /* Then, generate code to do all the destructions. Do these
3617 in reverse order so that the most recently constructed
3618 variable is the first destroyed. If we're using
3619 __cxa_atexit, then we don't need to do this; functions
3620 were registered at initialization time to destroy the
3622 if (!flag_use_cxa_atexit
)
3624 vars
= nreverse (vars
);
3625 for (v
= vars
; v
; v
= TREE_CHAIN (v
))
3626 do_static_destruction (TREE_VALUE (v
));
3631 /* Finish up the static storage duration function for this
3633 finish_static_storage_duration_function (ssdf_body
);
3635 /* All those initializations and finalizations might cause
3636 us to need more inline functions, more template
3637 instantiations, etc. */
3641 /* Go through the various inline functions, and see if any need
3643 for (i
= 0; i
< deferred_fns_used
; ++i
)
3645 tree decl
= VARRAY_TREE (deferred_fns
, i
);
3646 import_export_decl (decl
);
3647 if (DECL_ARTIFICIAL (decl
) && ! DECL_INITIAL (decl
)
3649 && (! DECL_REALLY_EXTERN (decl
) || DECL_INLINE (decl
)))
3651 /* Even though we're already at the top-level, we push
3652 there again. That way, when we pop back a few lines
3653 hence, all of our state is restored. Otherwise,
3654 finish_function doesn't clean things up, and we end
3655 up with CURRENT_FUNCTION_DECL set. */
3656 push_to_top_level ();
3657 if (DECL_TINFO_FN_P (decl
))
3658 synthesize_tinfo_fn (decl
);
3660 synthesize_method (decl
);
3661 pop_from_top_level ();
3666 /* Mark all functions that might deal with exception-handling as
3668 mark_all_runtime_matches ();
3670 /* We lie to the back-end, pretending that some functions are
3671 not defined when they really are. This keeps these functions
3672 from being put out unnecessarily. But, we must stop lying
3673 when the functions are referenced, or if they are not comdat
3674 since they need to be put out now. */
3675 for (i
= 0; i
< deferred_fns_used
; ++i
)
3677 tree decl
= VARRAY_TREE (deferred_fns
, i
);
3679 if (DECL_NOT_REALLY_EXTERN (decl
)
3680 && DECL_INITIAL (decl
)
3681 && DECL_NEEDED_P (decl
))
3682 DECL_EXTERNAL (decl
) = 0;
3684 /* If we're going to need to write this function out, and
3685 there's already a body for it, create RTL for it now.
3686 (There might be no body if this is a method we haven't
3687 gotten around to synthesizing yet.) */
3688 if (!DECL_EXTERNAL (decl
)
3689 && DECL_NEEDED_P (decl
)
3690 && DECL_SAVED_TREE (decl
)
3691 && !DECL_SAVED_INSNS (decl
)
3692 && !TREE_ASM_WRITTEN (decl
))
3694 int saved_not_really_extern
;
3696 /* When we call finish_function in expand_body, it will
3697 try to reset DECL_NOT_REALLY_EXTERN so we save and
3699 saved_not_really_extern
= DECL_NOT_REALLY_EXTERN (decl
);
3700 /* Generate RTL for this function now that we know we
3703 /* Undo the damage done by finish_function. */
3704 DECL_EXTERNAL (decl
) = 0;
3705 DECL_NOT_REALLY_EXTERN (decl
) = saved_not_really_extern
;
3706 /* If we're compiling -fsyntax-only pretend that this
3707 function has been written out so that we don't try to
3709 if (flag_syntax_only
)
3710 TREE_ASM_WRITTEN (decl
) = 1;
3715 if (deferred_fns_used
3716 && wrapup_global_declarations (&VARRAY_TREE (deferred_fns
, 0),
3719 if (walk_namespaces (wrapup_globals_for_namespace
, /*data=*/0))
3722 /* Static data members are just like namespace-scope globals. */
3723 for (i
= 0; i
< pending_statics_used
; ++i
)
3725 tree decl
= VARRAY_TREE (pending_statics
, i
);
3726 if (TREE_ASM_WRITTEN (decl
))
3728 import_export_decl (decl
);
3729 if (DECL_NOT_REALLY_EXTERN (decl
) && ! DECL_IN_AGGR_P (decl
))
3730 DECL_EXTERNAL (decl
) = 0;
3733 && wrapup_global_declarations (&VARRAY_TREE (pending_statics
, 0),
3734 pending_statics_used
))
3739 /* We give C linkage to static constructors and destructors. */
3740 push_lang_context (lang_name_c
);
3742 /* Generate initialization and destruction functions for all
3743 priorities for which they are required. */
3744 if (priority_info_map
)
3745 splay_tree_foreach (priority_info_map
,
3746 generate_ctor_and_dtor_functions_for_priority
,
3749 /* We're done with the splay-tree now. */
3750 if (priority_info_map
)
3751 splay_tree_delete (priority_info_map
);
3753 /* We're done with static constructors, so we can go back to "C++"
3755 pop_lang_context ();
3757 /* Now delete from the chain of variables all virtual function tables.
3758 We output them all ourselves, because each will be treated
3759 specially. We don't do this if we're just doing semantic
3760 analysis, and not code-generation. */
3761 if (!flag_syntax_only
)
3762 walk_globals (vtable_decl_p
, prune_vtable_vardecl
, /*data=*/0);
3764 /* Now, issue warnings about static, but not defined, functions,
3765 etc., and emit debugging information. */
3766 walk_namespaces (wrapup_globals_for_namespace
, /*data=*/&reconsider
);
3767 if (pending_statics
)
3768 check_global_declarations (&VARRAY_TREE (pending_statics
, 0),
3769 pending_statics_used
);
3773 /* The entire file is now complete. If requested, dump everything
3775 if (flag_dump_translation_unit
)
3776 dump_node_to_file (global_namespace
, flag_dump_translation_unit
);
3778 /* If there's some tool that wants to examine the entire translation
3779 unit, let it do so now. */
3781 (*back_end_hook
) (global_namespace
);
3783 timevar_pop (TV_VARCONST
);
3785 if (flag_detailed_statistics
)
3787 dump_tree_statistics ();
3788 dump_time_statistics ();
3792 /* This is something of the form 'A()()()()()+1' that has turned out to be an
3793 expr. Since it was parsed like a type, we need to wade through and fix
3794 that. Unfortunately, since operator() is left-associative, we can't use
3795 tail recursion. In the above example, TYPE is `A', and DECL is
3798 Maybe this shouldn't be recursive, but how often will it actually be
3802 reparse_absdcl_as_expr (type
, decl
)
3805 /* do build_functional_cast (type, NULL_TREE) at bottom */
3806 if (TREE_OPERAND (decl
, 0) == NULL_TREE
)
3807 return build_functional_cast (type
, NULL_TREE
);
3810 decl
= reparse_absdcl_as_expr (type
, TREE_OPERAND (decl
, 0));
3812 decl
= build_x_function_call (decl
, NULL_TREE
, current_class_ref
);
3814 if (TREE_CODE (decl
) == CALL_EXPR
3815 && (! TREE_TYPE (decl
)
3816 || TREE_CODE (TREE_TYPE (decl
)) != VOID_TYPE
))
3817 decl
= require_complete_type (decl
);
3822 /* This is something of the form `int ((int)(int)(int)1)' that has turned
3823 out to be an expr. Since it was parsed like a type, we need to wade
3824 through and fix that. Since casts are right-associative, we are
3825 reversing the order, so we don't have to recurse.
3827 In the above example, DECL is the `(int)(int)(int)', and EXPR is the
3831 reparse_absdcl_as_casts (decl
, expr
)
3836 if (TREE_CODE (expr
) == CONSTRUCTOR
3837 && TREE_TYPE (expr
) == 0)
3839 type
= groktypename (TREE_VALUE (CALL_DECLARATOR_PARMS (decl
)));
3840 decl
= TREE_OPERAND (decl
, 0);
3842 expr
= digest_init (type
, expr
, (tree
*) 0);
3843 if (TREE_CODE (type
) == ARRAY_TYPE
&& !COMPLETE_TYPE_P (type
))
3845 int failure
= complete_array_type (type
, expr
, 1);
3847 my_friendly_abort (78);
3853 type
= groktypename (TREE_VALUE (CALL_DECLARATOR_PARMS (decl
)));
3854 decl
= TREE_OPERAND (decl
, 0);
3855 expr
= build_c_cast (type
, expr
);
3858 if (warn_old_style_cast
&& ! in_system_header
3859 && current_lang_name
!= lang_name_c
)
3860 warning ("use of old-style cast");
3865 /* Given plain tree nodes for an expression, build up the full semantics. */
3868 build_expr_from_tree (t
)
3871 if (t
== NULL_TREE
|| t
== error_mark_node
)
3874 switch (TREE_CODE (t
))
3876 case IDENTIFIER_NODE
:
3877 return do_identifier (t
, 0, NULL_TREE
);
3880 if (LOOKUP_EXPR_GLOBAL (t
))
3881 return do_scoped_id (TREE_OPERAND (t
, 0), 0);
3883 return do_identifier (TREE_OPERAND (t
, 0), 0, NULL_TREE
);
3885 case TEMPLATE_ID_EXPR
:
3886 return (lookup_template_function
3887 (build_expr_from_tree (TREE_OPERAND (t
, 0)),
3888 build_expr_from_tree (TREE_OPERAND (t
, 1))));
3891 return build_x_indirect_ref
3892 (build_expr_from_tree (TREE_OPERAND (t
, 0)), "unary *");
3895 return build_functional_cast
3896 (TREE_TYPE (t
), build_expr_from_tree (TREE_OPERAND (t
, 0)));
3898 case REINTERPRET_CAST_EXPR
:
3899 return build_reinterpret_cast
3900 (TREE_TYPE (t
), build_expr_from_tree (TREE_OPERAND (t
, 0)));
3902 case CONST_CAST_EXPR
:
3903 return build_const_cast
3904 (TREE_TYPE (t
), build_expr_from_tree (TREE_OPERAND (t
, 0)));
3906 case DYNAMIC_CAST_EXPR
:
3907 return build_dynamic_cast
3908 (TREE_TYPE (t
), build_expr_from_tree (TREE_OPERAND (t
, 0)));
3910 case STATIC_CAST_EXPR
:
3911 return build_static_cast
3912 (TREE_TYPE (t
), build_expr_from_tree (TREE_OPERAND (t
, 0)));
3914 case PREDECREMENT_EXPR
:
3915 case PREINCREMENT_EXPR
:
3916 case POSTDECREMENT_EXPR
:
3917 case POSTINCREMENT_EXPR
:
3921 case TRUTH_NOT_EXPR
:
3923 case CONVERT_EXPR
: /* Unary + */
3928 return build_x_unary_op (TREE_CODE (t
),
3929 build_expr_from_tree (TREE_OPERAND (t
, 0)));
3934 case TRUNC_DIV_EXPR
:
3936 case FLOOR_DIV_EXPR
:
3937 case ROUND_DIV_EXPR
:
3938 case EXACT_DIV_EXPR
:
3940 case BIT_ANDTC_EXPR
:
3943 case TRUNC_MOD_EXPR
:
3944 case FLOOR_MOD_EXPR
:
3945 case TRUTH_ANDIF_EXPR
:
3946 case TRUTH_ORIF_EXPR
:
3947 case TRUTH_AND_EXPR
:
3962 return build_x_binary_op
3964 build_expr_from_tree (TREE_OPERAND (t
, 0)),
3965 build_expr_from_tree (TREE_OPERAND (t
, 1)));
3968 return build_m_component_ref
3969 (build_expr_from_tree (TREE_OPERAND (t
, 0)),
3970 build_expr_from_tree (TREE_OPERAND (t
, 1)));
3973 return build_offset_ref (TREE_OPERAND (t
, 0), TREE_OPERAND (t
, 1));
3976 if (TREE_OPERAND (t
, 0) == NULL_TREE
)
3978 return build_parse_node (ARRAY_REF
, NULL_TREE
,
3979 build_expr_from_tree (TREE_OPERAND (t
, 1)));
3980 return grok_array_decl (build_expr_from_tree (TREE_OPERAND (t
, 0)),
3981 build_expr_from_tree (TREE_OPERAND (t
, 1)));
3986 tree r
= build_expr_from_tree (TREE_OPERAND (t
, 0));
3989 return TREE_CODE (t
) == SIZEOF_EXPR
? c_sizeof (r
) : c_alignof (r
);
3993 return build_x_modify_expr
3994 (build_expr_from_tree (TREE_OPERAND (t
, 0)),
3995 TREE_CODE (TREE_OPERAND (t
, 1)),
3996 build_expr_from_tree (TREE_OPERAND (t
, 2)));
3999 return build_x_arrow
4000 (build_expr_from_tree (TREE_OPERAND (t
, 0)));
4004 (build_expr_from_tree (TREE_OPERAND (t
, 0)),
4005 build_expr_from_tree (TREE_OPERAND (t
, 1)),
4006 build_expr_from_tree (TREE_OPERAND (t
, 2)),
4007 NEW_EXPR_USE_GLOBAL (t
));
4010 return delete_sanity
4011 (build_expr_from_tree (TREE_OPERAND (t
, 0)),
4012 build_expr_from_tree (TREE_OPERAND (t
, 1)),
4013 DELETE_EXPR_USE_VEC (t
), DELETE_EXPR_USE_GLOBAL (t
));
4016 if (TREE_OPERAND (t
, 1) == NULL_TREE
)
4017 return build_x_compound_expr
4018 (build_expr_from_tree (TREE_OPERAND (t
, 0)));
4020 my_friendly_abort (42);
4022 case METHOD_CALL_EXPR
:
4023 if (TREE_CODE (TREE_OPERAND (t
, 0)) == SCOPE_REF
)
4025 tree ref
= TREE_OPERAND (t
, 0);
4026 return build_scoped_method_call
4027 (build_expr_from_tree (TREE_OPERAND (t
, 1)),
4028 build_expr_from_tree (TREE_OPERAND (ref
, 0)),
4029 TREE_OPERAND (ref
, 1),
4030 build_expr_from_tree (TREE_OPERAND (t
, 2)));
4034 tree fn
= TREE_OPERAND (t
, 0);
4036 /* We can get a TEMPLATE_ID_EXPR here on code like:
4040 so we must resolve that. However, we can also get things
4041 like a BIT_NOT_EXPR here, when referring to a destructor,
4042 and things like that are not correctly resolved by
4043 build_expr_from_tree. So, just use build_expr_from_tree
4044 when we really need it. */
4045 if (TREE_CODE (fn
) == TEMPLATE_ID_EXPR
)
4046 fn
= lookup_template_function
4047 (TREE_OPERAND (fn
, 0),
4048 build_expr_from_tree (TREE_OPERAND (fn
, 1)));
4050 return build_method_call
4051 (build_expr_from_tree (TREE_OPERAND (t
, 1)),
4053 build_expr_from_tree (TREE_OPERAND (t
, 2)),
4054 NULL_TREE
, LOOKUP_NORMAL
);
4058 if (TREE_CODE (TREE_OPERAND (t
, 0)) == SCOPE_REF
)
4060 tree ref
= TREE_OPERAND (t
, 0);
4061 return build_member_call
4062 (build_expr_from_tree (TREE_OPERAND (ref
, 0)),
4063 TREE_OPERAND (ref
, 1),
4064 build_expr_from_tree (TREE_OPERAND (t
, 1)));
4068 tree name
= TREE_OPERAND (t
, 0);
4070 tree args
= build_expr_from_tree (TREE_OPERAND (t
, 1));
4071 if (args
!= NULL_TREE
&& TREE_CODE (name
) == LOOKUP_EXPR
4072 && !LOOKUP_EXPR_GLOBAL (name
)
4073 && TREE_CODE ((id
= TREE_OPERAND (name
, 0))) == IDENTIFIER_NODE
4074 && (!current_class_type
4075 || !lookup_member (current_class_type
, id
, 0, 0)))
4077 /* Do Koenig lookup if there are no class members. */
4078 name
= do_identifier (id
, 0, args
);
4080 else if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
4081 || ! really_overloaded_fn (name
))
4082 name
= build_expr_from_tree (name
);
4083 return build_x_function_call (name
, args
, current_class_ref
);
4087 return build_x_conditional_expr
4088 (build_expr_from_tree (TREE_OPERAND (t
, 0)),
4089 build_expr_from_tree (TREE_OPERAND (t
, 1)),
4090 build_expr_from_tree (TREE_OPERAND (t
, 2)));
4092 case PSEUDO_DTOR_EXPR
:
4093 return (finish_pseudo_destructor_call_expr
4094 (build_expr_from_tree (TREE_OPERAND (t
, 0)),
4095 build_expr_from_tree (TREE_OPERAND (t
, 1)),
4096 build_expr_from_tree (TREE_OPERAND (t
, 2))));
4100 tree purpose
, value
, chain
;
4102 if (t
== void_list_node
)
4105 purpose
= TREE_PURPOSE (t
);
4107 purpose
= build_expr_from_tree (purpose
);
4108 value
= TREE_VALUE (t
);
4110 value
= build_expr_from_tree (value
);
4111 chain
= TREE_CHAIN (t
);
4112 if (chain
&& chain
!= void_type_node
)
4113 chain
= build_expr_from_tree (chain
);
4114 return tree_cons (purpose
, value
, chain
);
4119 tree object
= build_expr_from_tree (TREE_OPERAND (t
, 0));
4120 tree field
= TREE_OPERAND (t
, 1);
4122 /* We use a COMPONENT_REF to indicate things of the form `x.b'
4123 and `x.A::b'. We must distinguish between those cases
4125 if (TREE_CODE (field
) == SCOPE_REF
)
4126 return build_object_ref (object
,
4127 TREE_OPERAND (field
, 0),
4128 TREE_OPERAND (field
, 1));
4130 return build_x_component_ref (object
, field
,
4135 return build_throw (build_expr_from_tree (TREE_OPERAND (t
, 0)));
4141 /* digest_init will do the wrong thing if we let it. */
4142 if (TREE_TYPE (t
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (t
)))
4145 r
= build_nt (CONSTRUCTOR
, NULL_TREE
,
4146 build_expr_from_tree (CONSTRUCTOR_ELTS (t
)));
4147 TREE_HAS_CONSTRUCTOR (r
) = TREE_HAS_CONSTRUCTOR (t
);
4150 return digest_init (TREE_TYPE (t
), r
, 0);
4155 if (TYPE_P (TREE_OPERAND (t
, 0)))
4156 return get_typeid (TREE_OPERAND (t
, 0));
4157 return build_typeid (build_expr_from_tree (TREE_OPERAND (t
, 0)));
4160 return convert_from_reference (t
);
4163 return build_va_arg (build_expr_from_tree (TREE_OPERAND (t
, 0)),
4171 /* This is something of the form `int (*a)++' that has turned out to be an
4172 expr. It was only converted into parse nodes, so we need to go through
4173 and build up the semantics. Most of the work is done by
4174 build_expr_from_tree, above.
4176 In the above example, TYPE is `int' and DECL is `*a'. */
4179 reparse_decl_as_expr (type
, decl
)
4182 decl
= build_expr_from_tree (decl
);
4184 return build_functional_cast (type
, build_tree_list (NULL_TREE
, decl
));
4189 /* This is something of the form `int (*a)' that has turned out to be a
4190 decl. It was only converted into parse nodes, so we need to do the
4191 checking that make_{pointer,reference}_declarator do. */
4194 finish_decl_parsing (decl
)
4197 extern int current_class_depth
;
4199 switch (TREE_CODE (decl
))
4201 case IDENTIFIER_NODE
:
4204 return make_pointer_declarator
4205 (NULL_TREE
, finish_decl_parsing (TREE_OPERAND (decl
, 0)));
4207 return make_reference_declarator
4208 (NULL_TREE
, finish_decl_parsing (TREE_OPERAND (decl
, 0)));
4210 TREE_OPERAND (decl
, 0) = finish_decl_parsing (TREE_OPERAND (decl
, 0));
4213 push_nested_class (TREE_TYPE (TREE_OPERAND (decl
, 0)), 3);
4214 TREE_COMPLEXITY (decl
) = current_class_depth
;
4217 TREE_OPERAND (decl
, 0) = finish_decl_parsing (TREE_OPERAND (decl
, 0));
4220 /* For attribute handling. */
4221 TREE_VALUE (decl
) = finish_decl_parsing (TREE_VALUE (decl
));
4224 my_friendly_abort (5);
4230 check_cp_case_value (value
)
4233 if (value
== NULL_TREE
)
4236 /* Strip NON_LVALUE_EXPRs since we aren't using as an lvalue. */
4237 STRIP_TYPE_NOPS (value
);
4238 value
= decl_constant_value (value
);
4239 STRIP_TYPE_NOPS (value
);
4240 value
= fold (value
);
4242 if (TREE_CODE (value
) != INTEGER_CST
4243 && value
!= error_mark_node
)
4245 cp_error ("case label `%E' does not reduce to an integer constant",
4247 value
= error_mark_node
;
4250 /* Promote char or short to int. */
4251 value
= default_conversion (value
);
4253 constant_expression_warning (value
);
4258 /* Return 1 if root encloses child. */
4261 is_namespace_ancestor (root
, child
)
4266 if (root
== global_namespace
)
4268 if (child
== global_namespace
)
4270 return is_namespace_ancestor (root
, CP_DECL_CONTEXT (child
));
4274 /* Return the namespace that is the common ancestor
4275 of two given namespaces. */
4278 namespace_ancestor (ns1
, ns2
)
4281 if (is_namespace_ancestor (ns1
, ns2
))
4283 return namespace_ancestor (CP_DECL_CONTEXT (ns1
), ns2
);
4286 /* Insert used into the using list of user. Set indirect_flag if this
4287 directive is not directly from the source. Also find the common
4288 ancestor and let our users know about the new namespace */
4290 add_using_namespace (user
, used
, indirect
)
4296 /* Using oneself is a no-op. */
4299 my_friendly_assert (TREE_CODE (user
) == NAMESPACE_DECL
, 380);
4300 my_friendly_assert (TREE_CODE (used
) == NAMESPACE_DECL
, 380);
4301 /* Check if we already have this. */
4302 t
= purpose_member (used
, DECL_NAMESPACE_USING (user
));
4306 /* Promote to direct usage. */
4307 TREE_INDIRECT_USING (t
) = 0;
4311 /* Add used to the user's using list. */
4312 DECL_NAMESPACE_USING (user
)
4313 = tree_cons (used
, namespace_ancestor (user
, used
),
4314 DECL_NAMESPACE_USING (user
));
4316 TREE_INDIRECT_USING (DECL_NAMESPACE_USING (user
)) = indirect
;
4318 /* Add user to the used's users list. */
4319 DECL_NAMESPACE_USERS (used
)
4320 = tree_cons (user
, 0, DECL_NAMESPACE_USERS (used
));
4322 /* Recursively add all namespaces used. */
4323 for (t
= DECL_NAMESPACE_USING (used
); t
; t
= TREE_CHAIN (t
))
4324 /* indirect usage */
4325 add_using_namespace (user
, TREE_PURPOSE (t
), 1);
4327 /* Tell everyone using us about the new used namespaces. */
4328 for (t
= DECL_NAMESPACE_USERS (user
); t
; t
= TREE_CHAIN (t
))
4329 add_using_namespace (TREE_PURPOSE (t
), used
, 1);
4332 /* Combines two sets of overloaded functions into an OVERLOAD chain, removing
4333 duplicates. The first list becomes the tail of the result.
4335 The algorithm is O(n^2). We could get this down to O(n log n) by
4336 doing a sort on the addresses of the functions, if that becomes
4340 merge_functions (s1
, s2
)
4344 for (; s2
; s2
= OVL_NEXT (s2
))
4346 tree fn
= OVL_CURRENT (s2
);
4347 if (! ovl_member (fn
, s1
))
4348 s1
= build_overload (fn
, s1
);
4353 /* This should return an error not all definitions define functions.
4354 It is not an error if we find two functions with exactly the
4355 same signature, only if these are selected in overload resolution.
4356 old is the current set of bindings, new the freshly-found binding.
4357 XXX Do we want to give *all* candidates in case of ambiguity?
4358 XXX In what way should I treat extern declarations?
4359 XXX I don't want to repeat the entire duplicate_decls here */
4362 ambiguous_decl (name
, old
, new, flags
)
4369 my_friendly_assert (old
!= NULL_TREE
, 393);
4370 /* Copy the value. */
4371 val
= BINDING_VALUE (new);
4373 switch (TREE_CODE (val
))
4376 /* If we expect types or namespaces, and not templates,
4377 or this is not a template class. */
4378 if (LOOKUP_QUALIFIERS_ONLY (flags
)
4379 && !DECL_CLASS_TEMPLATE_P (val
))
4383 if (LOOKUP_NAMESPACES_ONLY (flags
))
4386 case NAMESPACE_DECL
:
4387 if (LOOKUP_TYPES_ONLY (flags
))
4391 if (LOOKUP_QUALIFIERS_ONLY (flags
))
4395 if (!BINDING_VALUE (old
))
4396 BINDING_VALUE (old
) = val
;
4397 else if (val
&& val
!= BINDING_VALUE (old
))
4399 if (is_overloaded_fn (BINDING_VALUE (old
))
4400 && is_overloaded_fn (val
))
4402 BINDING_VALUE (old
) = merge_functions (BINDING_VALUE (old
),
4407 /* Some declarations are functions, some are not. */
4408 if (flags
& LOOKUP_COMPLAIN
)
4410 /* If we've already given this error for this lookup,
4411 BINDING_VALUE (old) is error_mark_node, so let's not
4412 repeat ourselves. */
4413 if (BINDING_VALUE (old
) != error_mark_node
)
4415 cp_error ("use of `%D' is ambiguous", name
);
4416 cp_error_at (" first declared as `%#D' here",
4417 BINDING_VALUE (old
));
4419 cp_error_at (" also declared as `%#D' here", val
);
4421 BINDING_VALUE (old
) = error_mark_node
;
4424 /* ... and copy the type. */
4425 type
= BINDING_TYPE (new);
4426 if (LOOKUP_NAMESPACES_ONLY (flags
))
4428 if (!BINDING_TYPE (old
))
4429 BINDING_TYPE (old
) = type
;
4430 else if (type
&& BINDING_TYPE (old
) != type
)
4432 if (flags
& LOOKUP_COMPLAIN
)
4434 cp_error ("`%D' denotes an ambiguous type",name
);
4435 cp_error_at (" first type here", BINDING_TYPE (old
));
4436 cp_error_at (" other type here", type
);
4442 /* Subroutine of unualified_namespace_lookup:
4443 Add the bindings of NAME in used namespaces to VAL.
4444 We are currently looking for names in namespace SCOPE, so we
4445 look through USINGS for using-directives of namespaces
4446 which have SCOPE as a common ancestor with the current scope.
4447 Returns zero on errors. */
4450 lookup_using_namespace (name
, val
, usings
, scope
, flags
, spacesp
)
4451 tree name
, val
, usings
, scope
;
4457 /* Iterate over all used namespaces in current, searching for using
4458 directives of scope. */
4459 for (iter
= usings
; iter
; iter
= TREE_CHAIN (iter
))
4460 if (TREE_VALUE (iter
) == scope
)
4463 *spacesp
= tree_cons (TREE_PURPOSE (iter
), NULL_TREE
,
4465 val1
= binding_for_name (name
, TREE_PURPOSE (iter
));
4466 /* Resolve ambiguities. */
4467 val
= ambiguous_decl (name
, val
, val1
, flags
);
4469 return BINDING_VALUE (val
) != error_mark_node
;
4473 Accepts the NAME to lookup and its qualifying SCOPE.
4474 Returns the name/type pair found into the CPLUS_BINDING RESULT,
4478 qualified_lookup_using_namespace (name
, scope
, result
, flags
)
4484 /* Maintain a list of namespaces visited... */
4485 tree seen
= NULL_TREE
;
4486 /* ... and a list of namespace yet to see. */
4487 tree todo
= NULL_TREE
;
4489 /* Look through namespace aliases. */
4490 scope
= ORIGINAL_NAMESPACE (scope
);
4491 while (scope
&& (result
!= error_mark_node
))
4493 seen
= tree_cons (scope
, NULL_TREE
, seen
);
4494 result
= ambiguous_decl (name
, result
,
4495 binding_for_name (name
, scope
), flags
);
4496 if (!BINDING_VALUE (result
) && !BINDING_TYPE (result
))
4497 /* Consider using directives. */
4498 for (usings
= DECL_NAMESPACE_USING (scope
); usings
;
4499 usings
= TREE_CHAIN (usings
))
4500 /* If this was a real directive, and we have not seen it. */
4501 if (!TREE_INDIRECT_USING (usings
)
4502 && !purpose_member (TREE_PURPOSE (usings
), seen
))
4503 todo
= tree_cons (TREE_PURPOSE (usings
), NULL_TREE
, todo
);
4506 scope
= TREE_PURPOSE (todo
);
4507 todo
= TREE_CHAIN (todo
);
4510 scope
= NULL_TREE
; /* If there never was a todo list. */
4512 return result
!= error_mark_node
;
4515 /* [namespace.memdef]/2 */
4517 /* Set the context of a declaration to scope. Complain if we are not
4521 set_decl_namespace (decl
, scope
, friendp
)
4527 if (scope
== std_node
)
4528 scope
= global_namespace
;
4529 /* Get rid of namespace aliases. */
4530 scope
= ORIGINAL_NAMESPACE (scope
);
4532 /* It is ok for friends to be qualified in parallel space. */
4533 if (!friendp
&& !is_namespace_ancestor (current_namespace
, scope
))
4534 cp_error ("declaration of `%D' not in a namespace surrounding `%D'",
4536 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
4537 if (scope
!= current_namespace
)
4539 /* See whether this has been declared in the namespace. */
4540 old
= namespace_binding (DECL_NAME (decl
), scope
);
4542 /* No old declaration at all. */
4544 if (!is_overloaded_fn (decl
))
4545 /* Don't compare non-function decls with decls_match here,
4546 since it can't check for the correct constness at this
4547 point. pushdecl will find those errors later. */
4549 /* Since decl is a function, old should contain a function decl. */
4550 if (!is_overloaded_fn (old
))
4552 if (processing_template_decl
|| processing_specialization
)
4553 /* We have not yet called push_template_decl to turn the
4554 FUNCTION_DECL into a TEMPLATE_DECL, so the declarations
4555 won't match. But, we'll check later, when we construct the
4558 for (; old
; old
= OVL_NEXT (old
))
4559 if (decls_match (decl
, OVL_CURRENT (old
)))
4565 cp_error ("`%D' should have been declared inside `%D'",
4569 /* Compute the namespace where a declaration is defined. */
4572 decl_namespace (decl
)
4576 decl
= TYPE_STUB_DECL (decl
);
4577 while (DECL_CONTEXT (decl
))
4579 decl
= DECL_CONTEXT (decl
);
4580 if (TREE_CODE (decl
) == NAMESPACE_DECL
)
4583 decl
= TYPE_STUB_DECL (decl
);
4584 my_friendly_assert (DECL_P (decl
), 390);
4587 return global_namespace
;
4590 /* Return the namespace where the current declaration is declared. */
4593 current_decl_namespace ()
4596 /* If we have been pushed into a different namespace, use it. */
4597 if (decl_namespace_list
)
4598 return TREE_PURPOSE (decl_namespace_list
);
4600 if (current_class_type
)
4601 result
= decl_namespace (TYPE_STUB_DECL (current_class_type
));
4602 else if (current_function_decl
)
4603 result
= decl_namespace (current_function_decl
);
4605 result
= current_namespace
;
4609 /* Temporarily set the namespace for the current declaration. */
4612 push_decl_namespace (decl
)
4615 if (TREE_CODE (decl
) != NAMESPACE_DECL
)
4616 decl
= decl_namespace (decl
);
4617 decl_namespace_list
= tree_cons (decl
, NULL_TREE
, decl_namespace_list
);
4621 pop_decl_namespace ()
4623 decl_namespace_list
= TREE_CHAIN (decl_namespace_list
);
4626 /* Enter a class or namespace scope. */
4632 if (TREE_CODE (t
) == NAMESPACE_DECL
)
4633 push_decl_namespace (t
);
4638 /* Leave scope pushed by push_scope. */
4644 if (TREE_CODE (t
) == NAMESPACE_DECL
)
4645 pop_decl_namespace ();
4650 /* [basic.lookup.koenig] */
4651 /* A non-zero return value in the functions below indicates an error.
4652 All nodes allocated in the procedure are on the scratch obstack. */
4662 static int arg_assoc
PARAMS ((struct arg_lookup
*, tree
));
4663 static int arg_assoc_args
PARAMS ((struct arg_lookup
*, tree
));
4664 static int arg_assoc_type
PARAMS ((struct arg_lookup
*, tree
));
4665 static int add_function
PARAMS ((struct arg_lookup
*, tree
));
4666 static int arg_assoc_namespace
PARAMS ((struct arg_lookup
*, tree
));
4667 static int arg_assoc_class
PARAMS ((struct arg_lookup
*, tree
));
4668 static int arg_assoc_template_arg
PARAMS ((struct arg_lookup
*, tree
));
4670 /* Add a function to the lookup structure.
4671 Returns 1 on error. */
4674 add_function (k
, fn
)
4675 struct arg_lookup
*k
;
4678 /* We used to check here to see if the function was already in the list,
4679 but that's O(n^2), which is just too expensive for function lookup.
4680 Now we deal with the occasional duplicate in joust. In doing this, we
4681 assume that the number of duplicates will be small compared to the
4682 total number of functions being compared, which should usually be the
4685 /* We must find only functions, or exactly one non-function. */
4686 if (k
->functions
&& is_overloaded_fn (k
->functions
)
4687 && is_overloaded_fn (fn
))
4688 k
->functions
= build_overload (fn
, k
->functions
);
4689 else if (k
->functions
)
4691 tree f1
= OVL_CURRENT (k
->functions
);
4693 if (is_overloaded_fn (f1
))
4695 fn
= f1
; f1
= f2
; f2
= fn
;
4697 cp_error_at ("`%D' is not a function,", f1
);
4698 cp_error_at (" conflict with `%D'", f2
);
4699 cp_error (" in call to `%D'", k
->name
);
4707 /* Add functions of a namespace to the lookup structure.
4708 Returns 1 on error. */
4711 arg_assoc_namespace (k
, scope
)
4712 struct arg_lookup
*k
;
4717 if (purpose_member (scope
, k
->namespaces
))
4719 k
->namespaces
= tree_cons (scope
, NULL_TREE
, k
->namespaces
);
4721 value
= namespace_binding (k
->name
, scope
);
4725 for (; value
; value
= OVL_NEXT (value
))
4726 if (add_function (k
, OVL_CURRENT (value
)))
4732 /* Adds everything associated with a template argument to the lookup
4733 structure. Returns 1 on error. */
4736 arg_assoc_template_arg (k
, arg
)
4737 struct arg_lookup
* k
;
4740 /* [basic.lookup.koenig]
4742 If T is a template-id, its associated namespaces and classes are
4743 ... the namespaces and classes associated with the types of the
4744 template arguments provided for template type parameters
4745 (excluding template template parameters); the namespaces in which
4746 any template template arguments are defined; and the classes in
4747 which any member templates used as template template arguments
4748 are defined. [Note: non-type template arguments do not
4749 contribute to the set of associated namespaces. ] */
4751 /* Consider first template template arguments. */
4752 if (TREE_CODE (arg
) == TEMPLATE_DECL
)
4754 tree ctx
= CP_DECL_CONTEXT (arg
);
4756 /* It's not a member template. */
4757 if (TREE_CODE (ctx
) == NAMESPACE_DECL
)
4758 return arg_assoc_namespace (k
, ctx
);
4759 /* Otherwise, it must be member template. */
4761 return arg_assoc_class (k
, ctx
);
4763 /* It's not a template template argument, but it is a type template
4765 else if (TYPE_P (arg
))
4766 return arg_assoc_type (k
, arg
);
4767 /* It's a non-type template argument. */
4772 /* Adds everything associated with class to the lookup structure.
4773 Returns 1 on error. */
4776 arg_assoc_class (k
, type
)
4777 struct arg_lookup
* k
;
4780 tree list
, friends
, context
;
4783 /* Backend build structures, such as __builtin_va_list, aren't
4784 affected by all this. */
4785 if (!CLASS_TYPE_P (type
))
4788 if (purpose_member (type
, k
->classes
))
4790 k
->classes
= tree_cons (type
, NULL_TREE
, k
->classes
);
4792 context
= decl_namespace (TYPE_MAIN_DECL (type
));
4793 if (arg_assoc_namespace (k
, context
))
4796 /* Process baseclasses. */
4797 for (i
= 0; i
< CLASSTYPE_N_BASECLASSES (type
); i
++)
4798 if (arg_assoc_class (k
, TYPE_BINFO_BASETYPE (type
, i
)))
4801 /* Process friends. */
4802 for (list
= DECL_FRIENDLIST (TYPE_MAIN_DECL (type
)); list
;
4803 list
= TREE_CHAIN (list
))
4804 if (k
->name
== TREE_PURPOSE (list
))
4805 for (friends
= TREE_VALUE (list
); friends
;
4806 friends
= TREE_CHAIN (friends
))
4807 /* Only interested in global functions with potentially hidden
4808 (i.e. unqualified) declarations. */
4809 if (TREE_PURPOSE (list
) == error_mark_node
&& TREE_VALUE (list
)
4810 && decl_namespace (TREE_VALUE (list
)) == context
)
4811 if (add_function (k
, TREE_VALUE (list
)))
4814 /* Process template arguments. */
4815 if (CLASSTYPE_TEMPLATE_INFO (type
))
4817 list
= INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (type
));
4818 for (i
= 0; i
< TREE_VEC_LENGTH (list
); ++i
)
4819 arg_assoc_template_arg (k
, TREE_VEC_ELT (list
, i
));
4825 /* Adds everything associated with a given type.
4826 Returns 1 on error. */
4829 arg_assoc_type (k
, type
)
4830 struct arg_lookup
*k
;
4833 switch (TREE_CODE (type
))
4843 if (TYPE_PTRMEMFUNC_P (type
))
4844 return arg_assoc_type (k
, TYPE_PTRMEMFUNC_FN_TYPE (type
));
4845 return arg_assoc_class (k
, type
);
4847 case REFERENCE_TYPE
:
4849 return arg_assoc_type (k
, TREE_TYPE (type
));
4852 return arg_assoc_namespace (k
, decl_namespace (TYPE_MAIN_DECL (type
)));
4854 /* Pointer to member: associate class type and value type. */
4855 if (arg_assoc_type (k
, TYPE_OFFSET_BASETYPE (type
)))
4857 return arg_assoc_type (k
, TREE_TYPE (type
));
4859 /* The basetype is referenced in the first arg type, so just
4862 /* Associate the parameter types. */
4863 if (arg_assoc_args (k
, TYPE_ARG_TYPES (type
)))
4865 /* Associate the return type. */
4866 return arg_assoc_type (k
, TREE_TYPE (type
));
4867 case TEMPLATE_TYPE_PARM
:
4868 case TEMPLATE_TEMPLATE_PARM
:
4871 if (type
== unknown_type_node
)
4873 /* else fall through */
4875 my_friendly_abort (390);
4880 /* Adds everything associated with arguments. Returns 1 on error. */
4883 arg_assoc_args (k
, args
)
4884 struct arg_lookup
* k
;
4887 for (; args
; args
= TREE_CHAIN (args
))
4888 if (arg_assoc (k
, TREE_VALUE (args
)))
4893 /* Adds everything associated with a given tree_node. Returns 1 on error. */
4897 struct arg_lookup
* k
;
4900 if (n
== error_mark_node
)
4904 return arg_assoc_type (k
, n
);
4906 if (! type_unknown_p (n
))
4907 return arg_assoc_type (k
, TREE_TYPE (n
));
4909 if (TREE_CODE (n
) == ADDR_EXPR
)
4910 n
= TREE_OPERAND (n
, 0);
4911 if (TREE_CODE (n
) == COMPONENT_REF
)
4912 n
= TREE_OPERAND (n
, 1);
4913 if (TREE_CODE (n
) == OFFSET_REF
)
4914 n
= TREE_OPERAND (n
, 1);
4915 while (TREE_CODE (n
) == TREE_LIST
)
4918 if (TREE_CODE (n
) == FUNCTION_DECL
)
4919 return arg_assoc_type (k
, TREE_TYPE (n
));
4920 if (TREE_CODE (n
) == TEMPLATE_ID_EXPR
)
4922 /* [basic.lookup.koenig]
4924 If T is a template-id, its associated namespaces and classes
4925 are the namespace in which the template is defined; for
4926 member templates, the member template's class... */
4927 tree
template = TREE_OPERAND (n
, 0);
4928 tree args
= TREE_OPERAND (n
, 1);
4932 /* First, the template. There may actually be more than one if
4933 this is an overloaded function template. But, in that case,
4934 we only need the first; all the functions will be in the same
4936 template = OVL_CURRENT (template);
4938 ctx
= CP_DECL_CONTEXT (template);
4940 if (TREE_CODE (ctx
) == NAMESPACE_DECL
)
4942 if (arg_assoc_namespace (k
, ctx
) == 1)
4945 /* It must be a member template. */
4946 else if (arg_assoc_class (k
, ctx
) == 1)
4949 /* Now the arguments. */
4950 for (arg
= args
; arg
!= NULL_TREE
; arg
= TREE_CHAIN (arg
))
4951 if (arg_assoc_template_arg (k
, TREE_VALUE (arg
)) == 1)
4956 my_friendly_assert (TREE_CODE (n
) == OVERLOAD
, 980715);
4958 for (; n
; n
= OVL_CHAIN (n
))
4959 if (arg_assoc_type (k
, TREE_TYPE (OVL_FUNCTION (n
))))
4966 /* Performs Koenig lookup depending on arguments, where fns
4967 are the functions found in normal lookup. */
4970 lookup_arg_dependent (name
, fns
, args
)
4975 struct arg_lookup k
;
4976 tree fn
= NULL_TREE
;
4980 k
.classes
= NULL_TREE
;
4982 /* Note that we've already looked at some namespaces during normal
4983 unqualified lookup, unless we found a decl in function scope. */
4985 fn
= OVL_CURRENT (fns
);
4986 if (fn
&& TREE_CODE (fn
) == FUNCTION_DECL
&& DECL_LOCAL_FUNCTION_P (fn
))
4987 k
.namespaces
= NULL_TREE
;
4989 unqualified_namespace_lookup (name
, 0, &k
.namespaces
);
4991 arg_assoc_args (&k
, args
);
4995 /* Process a namespace-alias declaration. */
4998 do_namespace_alias (alias
, namespace)
4999 tree alias
, namespace;
5001 if (TREE_CODE (namespace) != NAMESPACE_DECL
)
5003 /* The parser did not find it, so it's not there. */
5004 cp_error ("unknown namespace `%D'", namespace);
5008 namespace = ORIGINAL_NAMESPACE (namespace);
5010 /* Build the alias. */
5011 alias
= build_lang_decl (NAMESPACE_DECL
, alias
, void_type_node
);
5012 DECL_NAMESPACE_ALIAS (alias
) = namespace;
5016 /* Check a non-member using-declaration. Return the name and scope
5017 being used, and the USING_DECL, or NULL_TREE on failure. */
5020 validate_nonmember_using_decl (decl
, scope
, name
)
5025 if (TREE_CODE (decl
) == SCOPE_REF
5026 && TREE_OPERAND (decl
, 0) == std_node
)
5028 if (namespace_bindings_p ()
5029 && current_namespace
== global_namespace
)
5030 /* There's no need for a using declaration at all, here,
5031 since `std' is the same as `::'. We can't just pass this
5032 on because we'll complain later about declaring something
5033 in the same scope as a using declaration with the same
5034 name. We return NULL_TREE which indicates to the caller
5035 that there's no need to do any further processing. */
5038 *scope
= global_namespace
;
5039 *name
= TREE_OPERAND (decl
, 1);
5041 else if (TREE_CODE (decl
) == SCOPE_REF
)
5043 *scope
= TREE_OPERAND (decl
, 0);
5044 *name
= TREE_OPERAND (decl
, 1);
5046 /* [namespace.udecl]
5048 A using-declaration for a class member shall be a
5049 member-declaration. */
5050 if (TREE_CODE (*scope
) != NAMESPACE_DECL
)
5052 if (TYPE_P (*scope
))
5053 cp_error ("`%T' is not a namespace", *scope
);
5055 cp_error ("`%D' is not a namespace", *scope
);
5059 else if (TREE_CODE (decl
) == IDENTIFIER_NODE
5060 || TREE_CODE (decl
) == TYPE_DECL
5061 || TREE_CODE (decl
) == TEMPLATE_DECL
)
5063 *scope
= global_namespace
;
5067 my_friendly_abort (382);
5069 *name
= DECL_NAME (*name
);
5070 /* Make a USING_DECL. */
5071 return push_using_decl (*scope
, *name
);
5074 /* Process local and global using-declarations. */
5077 do_nonmember_using_decl (scope
, name
, oldval
, oldtype
, newval
, newtype
)
5079 tree oldval
, oldtype
;
5080 tree
*newval
, *newtype
;
5084 *newval
= *newtype
= NULL_TREE
;
5085 decls
= make_node (CPLUS_BINDING
);
5086 if (!qualified_lookup_using_namespace (name
, scope
, decls
, 0))
5090 if (!BINDING_VALUE (decls
) && !BINDING_TYPE (decls
))
5092 cp_error ("`%D' not declared", name
);
5096 /* Check for using functions. */
5097 if (BINDING_VALUE (decls
) && is_overloaded_fn (BINDING_VALUE (decls
)))
5101 if (oldval
&& !is_overloaded_fn (oldval
))
5103 duplicate_decls (OVL_CURRENT (BINDING_VALUE (decls
)), oldval
);
5108 for (tmp
= BINDING_VALUE (decls
); tmp
; tmp
= OVL_NEXT (tmp
))
5110 tree new_fn
= OVL_CURRENT (tmp
);
5112 /* [namespace.udecl]
5114 If a function declaration in namespace scope or block
5115 scope has the same name and the same parameter types as a
5116 function introduced by a using declaration the program is
5118 for (tmp1
= oldval
; tmp1
; tmp1
= OVL_NEXT (tmp1
))
5120 tree old_fn
= OVL_CURRENT (tmp1
);
5122 if (!OVL_USED (tmp1
)
5123 && compparms (TYPE_ARG_TYPES (TREE_TYPE (new_fn
)),
5124 TYPE_ARG_TYPES (TREE_TYPE (old_fn
))))
5126 /* There was already a non-using declaration in
5127 this scope with the same parameter types. */
5128 cp_error ("`%D' is already declared in this scope",
5132 else if (duplicate_decls (new_fn
, old_fn
))
5133 /* We're re-using something we already used
5134 before. We don't need to add it again. */
5138 /* If we broke out of the loop, there's no reason to add
5139 this function to the using declarations for this
5144 *newval
= build_overload (OVL_CURRENT (tmp
), *newval
);
5145 if (TREE_CODE (*newval
) != OVERLOAD
)
5146 *newval
= ovl_cons (*newval
, NULL_TREE
);
5147 OVL_USED (*newval
) = 1;
5152 *newval
= BINDING_VALUE (decls
);
5154 duplicate_decls (*newval
, oldval
);
5157 *newtype
= BINDING_TYPE (decls
);
5158 if (oldtype
&& *newtype
&& oldtype
!= *newtype
)
5160 cp_error ("using directive `%D' introduced ambiguous type `%T'",
5166 /* Process a using-declaration not appearing in class or local scope. */
5169 do_toplevel_using_decl (decl
)
5172 tree scope
, name
, binding
;
5173 tree oldval
, oldtype
, newval
, newtype
;
5175 decl
= validate_nonmember_using_decl (decl
, &scope
, &name
);
5176 if (decl
== NULL_TREE
)
5179 binding
= binding_for_name (name
, current_namespace
);
5181 oldval
= BINDING_VALUE (binding
);
5182 oldtype
= BINDING_TYPE (binding
);
5184 do_nonmember_using_decl (scope
, name
, oldval
, oldtype
, &newval
, &newtype
);
5186 /* Copy declarations found. */
5188 BINDING_VALUE (binding
) = newval
;
5190 BINDING_TYPE (binding
) = newtype
;
5194 /* Process a using-declaration at function scope. */
5197 do_local_using_decl (decl
)
5201 tree oldval
, oldtype
, newval
, newtype
;
5203 decl
= validate_nonmember_using_decl (decl
, &scope
, &name
);
5204 if (decl
== NULL_TREE
)
5207 oldval
= lookup_name_current_level (name
);
5208 oldtype
= lookup_type_current_level (name
);
5210 do_nonmember_using_decl (scope
, name
, oldval
, oldtype
, &newval
, &newtype
);
5214 if (is_overloaded_fn (newval
))
5218 /* We only need to push declarations for those functions
5219 that were not already bound in the current level.
5220 The old value might be NULL_TREE, it might be a single
5221 function, or an OVERLOAD. */
5222 if (oldval
&& TREE_CODE (oldval
) == OVERLOAD
)
5223 term
= OVL_FUNCTION (oldval
);
5226 for (fn
= newval
; fn
&& OVL_CURRENT (fn
) != term
;
5228 push_overloaded_decl (OVL_CURRENT (fn
),
5229 PUSH_LOCAL
| PUSH_USING
);
5232 push_local_binding (name
, newval
, PUSH_USING
);
5235 set_identifier_type_value (name
, newtype
);
5239 do_class_using_decl (decl
)
5244 if (TREE_CODE (decl
) != SCOPE_REF
5245 || !TYPE_P (TREE_OPERAND (decl
, 0)))
5247 cp_error ("using-declaration for non-member at class scope");
5250 name
= TREE_OPERAND (decl
, 1);
5251 if (TREE_CODE (name
) == BIT_NOT_EXPR
)
5253 cp_error ("using-declaration for destructor");
5256 if (TREE_CODE (name
) == TYPE_DECL
)
5257 name
= DECL_NAME (name
);
5259 my_friendly_assert (TREE_CODE (name
) == IDENTIFIER_NODE
, 980716);
5261 value
= build_lang_decl (USING_DECL
, name
, void_type_node
);
5262 DECL_INITIAL (value
) = TREE_OPERAND (decl
, 0);
5266 /* Process a using-directive. */
5269 do_using_directive (namespace)
5272 if (namespace == std_node
)
5274 /* using namespace A::B::C; */
5275 if (TREE_CODE (namespace) == SCOPE_REF
)
5276 namespace = TREE_OPERAND (namespace, 1);
5277 if (TREE_CODE (namespace) == IDENTIFIER_NODE
)
5279 /* Lookup in lexer did not find a namespace. */
5280 cp_error ("namespace `%T' undeclared", namespace);
5283 if (TREE_CODE (namespace) != NAMESPACE_DECL
)
5285 cp_error ("`%T' is not a namespace", namespace);
5288 namespace = ORIGINAL_NAMESPACE (namespace);
5289 if (!toplevel_bindings_p ())
5290 push_using_directive (namespace);
5293 add_using_namespace (current_namespace
, namespace, 0);
5297 check_default_args (x
)
5300 tree arg
= TYPE_ARG_TYPES (TREE_TYPE (x
));
5301 int saw_def
= 0, i
= 0 - (TREE_CODE (TREE_TYPE (x
)) == METHOD_TYPE
);
5302 for (; arg
&& arg
!= void_list_node
; arg
= TREE_CHAIN (arg
), ++i
)
5304 if (TREE_PURPOSE (arg
))
5308 cp_error_at ("default argument missing for parameter %P of `%+#D'",
5319 TREE_USED (decl
) = 1;
5320 if (processing_template_decl
)
5322 assemble_external (decl
);
5324 /* Is it a synthesized method that needs to be synthesized? */
5325 if (TREE_CODE (decl
) == FUNCTION_DECL
5326 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
)
5327 && DECL_ARTIFICIAL (decl
)
5328 && ! DECL_INITIAL (decl
)
5329 /* Kludge: don't synthesize for default args. */
5330 && current_function_decl
)
5332 synthesize_method (decl
);
5333 /* If we've already synthesized the method we don't need to
5334 instantiate it, so we can return right away. */
5338 /* If this is a function or variable that is an instance of some
5339 template, we now know that we will need to actually do the
5340 instantiation. We check that DECL is not an explicit
5341 instantiation because that is not checked in instantiate_decl. */
5342 if ((DECL_NON_THUNK_FUNCTION_P (decl
) || TREE_CODE (decl
) == VAR_DECL
)
5343 && DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
)
5344 && (!DECL_EXPLICIT_INSTANTIATION (decl
)
5345 || (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_INLINE (decl
))))
5346 instantiate_decl (decl
, /*defer_ok=*/1);
5349 /* Helper function for named_class_head_sans_basetype nonterminal. We
5350 have just seen something of the form `AGGR SCOPE::ID'. Return a
5351 TYPE_DECL for the type declared by ID in SCOPE. */
5354 handle_class_head (aggr
, scope
, id
)
5355 tree aggr
, scope
, id
;
5359 if (TREE_CODE (id
) == TYPE_DECL
)
5361 else if (DECL_CLASS_TEMPLATE_P (id
))
5362 decl
= DECL_TEMPLATE_RESULT (id
);
5365 tree current
= current_scope();
5367 if (current
== NULL_TREE
)
5368 current
= current_namespace
;
5369 if (scope
== std_node
)
5370 scope
= global_namespace
;
5371 if (scope
== NULL_TREE
)
5372 scope
= global_namespace
;
5373 if (scope
== current
)
5375 /* We've been given AGGR SCOPE::ID, when we're already inside SCOPE.
5376 Be nice about it. */
5378 cp_pedwarn ("extra qualification `%T::' on member `%D' ignored",
5379 FROB_CONTEXT (scope
), id
);
5381 else if (scope
!= global_namespace
)
5382 cp_error ("`%T' does not have a nested type named `%D'", scope
, id
);
5384 cp_error ("no file-scope type named `%D'", id
);
5386 /* Inject it at the current scope. */
5387 decl
= TYPE_MAIN_DECL (xref_tag (aggr
, id
, 1));
5390 /* Enter the SCOPE. If this turns out not to be a definition, the
5391 parser must leave the scope. */
5392 push_scope (CP_DECL_CONTEXT (decl
));
5394 /* If we see something like:
5396 template <typename T> struct S::I ....
5398 we must create a TEMPLATE_DECL for the nested type. */
5399 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5400 decl
= push_template_decl (decl
);
5405 /* Initialize decl2.c. */
5410 ggc_add_tree_root (&decl_namespace_list
, 1);
5411 ggc_add_tree_varray_root (&deferred_fns
, 1);
5412 ggc_add_tree_varray_root (&pending_statics
, 1);
5413 ggc_add_tree_varray_root (&ssdf_decls
, 1);
5414 ggc_add_tree_root (&ssdf_decl
, 1);
5415 ggc_add_tree_root (&priority_decl
, 1);
5416 ggc_add_tree_root (&initialize_p_decl
, 1);
5417 ggc_add_tree_root (&pending_vtables
, 1);