1 /* Separate lexical analyzer for GNU C++.
2 Copyright (C) 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4 Hacked by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC 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 GCC 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 GCC; 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 /* This file is the lexical analyzer for GNU C++. */
28 #include "coretypes.h"
41 static int interface_strcmp (const char *);
42 static void init_cp_pragma (void);
44 static tree parse_strconst_pragma (const char *, int);
45 static void handle_pragma_vtable (cpp_reader *);
46 static void handle_pragma_unit (cpp_reader *);
47 static void handle_pragma_interface (cpp_reader *);
48 static void handle_pragma_implementation (cpp_reader *);
49 static void handle_pragma_java_exceptions (cpp_reader *);
51 static void init_operators (void);
52 static void copy_lang_type (tree);
54 /* A constraint that can be tested at compile time. */
55 #define CONSTRAINT(name, expr) extern int constraint_##name [(expr) ? 1 : -1]
57 /* Functions and data structures for #pragma interface.
59 `#pragma implementation' means that the main file being compiled
60 is considered to implement (provide) the classes that appear in
61 its main body. I.e., if this is file "foo.cc", and class `bar'
62 is defined in "foo.cc", then we say that "foo.cc implements bar".
64 All main input files "implement" themselves automagically.
66 `#pragma interface' means that unless this file (of the form "foo.h"
67 is not presently being included by file "foo.cc", the
68 CLASSTYPE_INTERFACE_ONLY bit gets set. The effect is that none
69 of the vtables nor any of the inline functions defined in foo.h
72 There are cases when we want to link files such as "defs.h" and
73 "main.cc". In this case, we give "defs.h" a `#pragma interface',
74 and "main.cc" has `#pragma implementation "defs.h"'. */
79 struct impl_files *next;
82 static struct impl_files *impl_file_chain;
85 int interface_only; /* whether or not current file is only for
86 interface definitions. */
87 int interface_unknown; /* whether or not we know this class
88 to behave according to #pragma interface. */
97 /* A mapping from tree codes to operator name information. */
98 operator_name_info_t operator_name_info[(int) LAST_CPLUS_TREE_CODE];
99 /* Similar, but for assignment operators. */
100 operator_name_info_t assignment_operator_name_info[(int) LAST_CPLUS_TREE_CODE];
102 /* Initialize data structures that keep track of operator names. */
104 #define DEF_OPERATOR(NAME, C, M, AR, AP) \
105 CONSTRAINT (C, sizeof "operator " + sizeof NAME <= 256);
106 #include "operators.def"
110 init_operators (void)
114 struct operator_name_info_t *oni;
116 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
117 sprintf (buffer, ISALPHA (NAME[0]) ? "operator %s" : "operator%s", NAME); \
118 identifier = get_identifier (buffer); \
119 IDENTIFIER_OPNAME_P (identifier) = 1; \
122 ? &assignment_operator_name_info[(int) CODE] \
123 : &operator_name_info[(int) CODE]); \
124 oni->identifier = identifier; \
126 oni->mangled_name = MANGLING; \
129 #include "operators.def"
132 operator_name_info[(int) ERROR_MARK].identifier
133 = get_identifier ("<invalid operator>");
135 /* Handle some special cases. These operators are not defined in
136 the language, but can be produced internally. We may need them
137 for error-reporting. (Eventually, we should ensure that this
138 does not happen. Error messages involving these operators will
139 be confusing to users.) */
141 operator_name_info [(int) INIT_EXPR].name
142 = operator_name_info [(int) MODIFY_EXPR].name;
143 operator_name_info [(int) EXACT_DIV_EXPR].name = "(ceiling /)";
144 operator_name_info [(int) CEIL_DIV_EXPR].name = "(ceiling /)";
145 operator_name_info [(int) FLOOR_DIV_EXPR].name = "(floor /)";
146 operator_name_info [(int) ROUND_DIV_EXPR].name = "(round /)";
147 operator_name_info [(int) CEIL_MOD_EXPR].name = "(ceiling %)";
148 operator_name_info [(int) FLOOR_MOD_EXPR].name = "(floor %)";
149 operator_name_info [(int) ROUND_MOD_EXPR].name = "(round %)";
150 operator_name_info [(int) ABS_EXPR].name = "abs";
151 operator_name_info [(int) TRUTH_AND_EXPR].name = "strict &&";
152 operator_name_info [(int) TRUTH_OR_EXPR].name = "strict ||";
153 operator_name_info [(int) RANGE_EXPR].name = "...";
154 operator_name_info [(int) CONVERT_EXPR].name = "+";
156 assignment_operator_name_info [(int) EXACT_DIV_EXPR].name
158 assignment_operator_name_info [(int) CEIL_DIV_EXPR].name
160 assignment_operator_name_info [(int) FLOOR_DIV_EXPR].name
162 assignment_operator_name_info [(int) ROUND_DIV_EXPR].name
164 assignment_operator_name_info [(int) CEIL_MOD_EXPR].name
166 assignment_operator_name_info [(int) FLOOR_MOD_EXPR].name
168 assignment_operator_name_info [(int) ROUND_MOD_EXPR].name
172 /* The reserved keyword table. */
175 const char *const word;
176 ENUM_BITFIELD(rid) const rid : 16;
177 const unsigned int disable : 16;
180 /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is
182 #define D_EXT 0x01 /* GCC extension */
183 #define D_ASM 0x02 /* in C99, but has a switch to turn it off */
185 CONSTRAINT(ridbits_fit, RID_LAST_MODIFIER < sizeof(unsigned long) * CHAR_BIT);
187 static const struct resword reswords[] =
189 { "_Complex", RID_COMPLEX, 0 },
190 { "__FUNCTION__", RID_FUNCTION_NAME, 0 },
191 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
192 { "__alignof", RID_ALIGNOF, 0 },
193 { "__alignof__", RID_ALIGNOF, 0 },
194 { "__asm", RID_ASM, 0 },
195 { "__asm__", RID_ASM, 0 },
196 { "__attribute", RID_ATTRIBUTE, 0 },
197 { "__attribute__", RID_ATTRIBUTE, 0 },
198 { "__builtin_offsetof", RID_OFFSETOF, 0 },
199 { "__builtin_va_arg", RID_VA_ARG, 0 },
200 { "__complex", RID_COMPLEX, 0 },
201 { "__complex__", RID_COMPLEX, 0 },
202 { "__const", RID_CONST, 0 },
203 { "__const__", RID_CONST, 0 },
204 { "__extension__", RID_EXTENSION, 0 },
205 { "__func__", RID_C99_FUNCTION_NAME, 0 },
206 { "__imag", RID_IMAGPART, 0 },
207 { "__imag__", RID_IMAGPART, 0 },
208 { "__inline", RID_INLINE, 0 },
209 { "__inline__", RID_INLINE, 0 },
210 { "__label__", RID_LABEL, 0 },
211 { "__null", RID_NULL, 0 },
212 { "__real", RID_REALPART, 0 },
213 { "__real__", RID_REALPART, 0 },
214 { "__restrict", RID_RESTRICT, 0 },
215 { "__restrict__", RID_RESTRICT, 0 },
216 { "__signed", RID_SIGNED, 0 },
217 { "__signed__", RID_SIGNED, 0 },
218 { "__thread", RID_THREAD, 0 },
219 { "__typeof", RID_TYPEOF, 0 },
220 { "__typeof__", RID_TYPEOF, 0 },
221 { "__volatile", RID_VOLATILE, 0 },
222 { "__volatile__", RID_VOLATILE, 0 },
223 { "asm", RID_ASM, D_ASM },
224 { "auto", RID_AUTO, 0 },
225 { "bool", RID_BOOL, 0 },
226 { "break", RID_BREAK, 0 },
227 { "case", RID_CASE, 0 },
228 { "catch", RID_CATCH, 0 },
229 { "char", RID_CHAR, 0 },
230 { "class", RID_CLASS, 0 },
231 { "const", RID_CONST, 0 },
232 { "const_cast", RID_CONSTCAST, 0 },
233 { "continue", RID_CONTINUE, 0 },
234 { "default", RID_DEFAULT, 0 },
235 { "delete", RID_DELETE, 0 },
237 { "double", RID_DOUBLE, 0 },
238 { "dynamic_cast", RID_DYNCAST, 0 },
239 { "else", RID_ELSE, 0 },
240 { "enum", RID_ENUM, 0 },
241 { "explicit", RID_EXPLICIT, 0 },
242 { "export", RID_EXPORT, 0 },
243 { "extern", RID_EXTERN, 0 },
244 { "false", RID_FALSE, 0 },
245 { "float", RID_FLOAT, 0 },
246 { "for", RID_FOR, 0 },
247 { "friend", RID_FRIEND, 0 },
248 { "goto", RID_GOTO, 0 },
250 { "inline", RID_INLINE, 0 },
251 { "int", RID_INT, 0 },
252 { "long", RID_LONG, 0 },
253 { "mutable", RID_MUTABLE, 0 },
254 { "namespace", RID_NAMESPACE, 0 },
255 { "new", RID_NEW, 0 },
256 { "operator", RID_OPERATOR, 0 },
257 { "private", RID_PRIVATE, 0 },
258 { "protected", RID_PROTECTED, 0 },
259 { "public", RID_PUBLIC, 0 },
260 { "register", RID_REGISTER, 0 },
261 { "reinterpret_cast", RID_REINTCAST, 0 },
262 { "return", RID_RETURN, 0 },
263 { "short", RID_SHORT, 0 },
264 { "signed", RID_SIGNED, 0 },
265 { "sizeof", RID_SIZEOF, 0 },
266 { "static", RID_STATIC, 0 },
267 { "static_cast", RID_STATCAST, 0 },
268 { "struct", RID_STRUCT, 0 },
269 { "switch", RID_SWITCH, 0 },
270 { "template", RID_TEMPLATE, 0 },
271 { "this", RID_THIS, 0 },
272 { "throw", RID_THROW, 0 },
273 { "true", RID_TRUE, 0 },
274 { "try", RID_TRY, 0 },
275 { "typedef", RID_TYPEDEF, 0 },
276 { "typename", RID_TYPENAME, 0 },
277 { "typeid", RID_TYPEID, 0 },
278 { "typeof", RID_TYPEOF, D_ASM|D_EXT },
279 { "union", RID_UNION, 0 },
280 { "unsigned", RID_UNSIGNED, 0 },
281 { "using", RID_USING, 0 },
282 { "virtual", RID_VIRTUAL, 0 },
283 { "void", RID_VOID, 0 },
284 { "volatile", RID_VOLATILE, 0 },
285 { "wchar_t", RID_WCHAR, 0 },
286 { "while", RID_WHILE, 0 },
295 int mask = ((flag_no_asm ? D_ASM : 0)
296 | (flag_no_gnu_keywords ? D_EXT : 0));
298 ridpointers = ggc_calloc ((int) RID_MAX, sizeof (tree));
299 for (i = 0; i < ARRAY_SIZE (reswords); i++)
301 id = get_identifier (reswords[i].word);
302 C_RID_CODE (id) = reswords[i].rid;
303 ridpointers [(int) reswords[i].rid] = id;
304 if (! (reswords[i].disable & mask))
305 C_IS_RESERVED_WORD (id) = 1;
310 init_cp_pragma (void)
312 c_register_pragma (0, "vtable", handle_pragma_vtable);
313 c_register_pragma (0, "unit", handle_pragma_unit);
314 c_register_pragma (0, "interface", handle_pragma_interface);
315 c_register_pragma (0, "implementation", handle_pragma_implementation);
316 c_register_pragma ("GCC", "interface", handle_pragma_interface);
317 c_register_pragma ("GCC", "implementation", handle_pragma_implementation);
318 c_register_pragma ("GCC", "java_exceptions", handle_pragma_java_exceptions);
321 /* Initialize the C++ front end. This function is very sensitive to
322 the exact order that things are done here. It would be nice if the
323 initialization done by this routine were moved to its subroutines,
324 and the ordering dependencies clarified and reduced. */
328 static const enum tree_code stmt_codes[] = {
333 INIT_STATEMENT_CODES (stmt_codes);
335 /* We cannot just assign to input_filename because it has already
336 been initialized and will be used later as an N_BINCL for stabs+
338 #ifdef USE_MAPPED_LOCATION
339 push_srcloc (BUILTINS_LOCATION);
341 push_srcloc ("<built-in>", 0);
346 init_cp_semantics ();
351 current_function_decl = NULL;
353 class_type_node = ridpointers[(int) RID_CLASS];
355 cxx_init_decl_processing ();
357 /* Create the built-in __null node. */
358 null_node = build_int_2 (0, 0);
359 TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0);
360 ridpointers[RID_NULL] = null_node;
362 interface_unknown = 1;
364 /* The fact that G++ uses COMDAT for many entities (inline
365 functions, template instantiations, virtual tables, etc.) mean
366 that it is fundamentally unreliable to try to make decisions
367 about whether or not to output a particular entity until the end
368 of the compilation. However, the inliner requires that functions
369 be provided to the back end if they are to be inlined.
370 Therefore, we always use unit-at-a-time mode; in that mode, we
371 can provide entities to the back end and it will decide what to
372 emit based on what is actually needed. */
373 flag_unit_at_a_time = 1;
375 if (c_common_init () == false)
389 /* Helper function to load global variables with interface
393 extract_interface_info (void)
395 struct c_fileinfo *finfo;
397 finfo = get_fileinfo (input_filename);
398 interface_only = finfo->interface_only;
399 interface_unknown = finfo->interface_unknown;
402 /* Return nonzero if S is not considered part of an
403 INTERFACE/IMPLEMENTATION pair. Otherwise, return 0. */
406 interface_strcmp (const char* s)
408 /* Set the interface/implementation bits for this scope. */
409 struct impl_files *ifiles;
412 for (ifiles = impl_file_chain; ifiles; ifiles = ifiles->next)
414 const char *t1 = ifiles->filename;
417 if (*s1 != *t1 || *s1 == 0)
420 while (*s1 == *t1 && *s1 != 0)
427 /* Don't get faked out by xxx.yyy.cc vs xxx.zzz.cc. */
428 if (strchr (s1, '.') || strchr (t1, '.'))
431 if (*s1 == '\0' || s1[-1] != '.' || t1[-1] != '.')
444 /* Parse a #pragma whose sole argument is a string constant.
445 If OPT is true, the argument is optional. */
447 parse_strconst_pragma (const char* name, int opt)
456 if (c_lex (&x) != CPP_EOF)
457 warning ("junk at end of #pragma %s", name);
461 if (t == CPP_EOF && opt)
464 error ("invalid #pragma %s", name);
469 handle_pragma_vtable (cpp_reader* dfile ATTRIBUTE_UNUSED )
471 parse_strconst_pragma ("vtable", 0);
472 sorry ("#pragma vtable no longer supported");
476 handle_pragma_unit (cpp_reader* dfile ATTRIBUTE_UNUSED )
478 /* Validate syntax, but don't do anything. */
479 parse_strconst_pragma ("unit", 0);
483 handle_pragma_interface (cpp_reader* dfile ATTRIBUTE_UNUSED )
485 tree fname = parse_strconst_pragma ("interface", 1);
486 struct c_fileinfo *finfo;
487 const char *main_filename;
489 if (fname == (tree)-1)
492 main_filename = lbasename (input_filename);
494 main_filename = TREE_STRING_POINTER (fname);
496 finfo = get_fileinfo (input_filename);
498 if (impl_file_chain == 0)
500 /* If this is zero at this point, then we are
501 auto-implementing. */
502 if (main_input_filename == 0)
503 main_input_filename = input_filename;
506 interface_only = interface_strcmp (main_filename);
507 #ifdef MULTIPLE_SYMBOL_SPACES
508 if (! interface_only)
510 interface_unknown = 0;
512 finfo->interface_only = interface_only;
513 finfo->interface_unknown = interface_unknown;
516 /* Note that we have seen a #pragma implementation for the key MAIN_FILENAME.
517 We used to only allow this at toplevel, but that restriction was buggy
518 in older compilers and it seems reasonable to allow it in the headers
519 themselves, too. It only needs to precede the matching #p interface.
521 We don't touch interface_only or interface_unknown; the user must specify
522 a matching #p interface for this to have any effect. */
525 handle_pragma_implementation (cpp_reader* dfile ATTRIBUTE_UNUSED )
527 tree fname = parse_strconst_pragma ("implementation", 1);
528 const char *main_filename;
529 struct impl_files *ifiles = impl_file_chain;
531 if (fname == (tree)-1)
536 if (main_input_filename)
537 main_filename = main_input_filename;
539 main_filename = input_filename;
540 main_filename = lbasename (main_filename);
544 main_filename = TREE_STRING_POINTER (fname);
545 if (cpp_included (parse_in, main_filename))
546 warning ("#pragma implementation for %s appears after file is included",
550 for (; ifiles; ifiles = ifiles->next)
552 if (! strcmp (ifiles->filename, main_filename))
557 ifiles = xmalloc (sizeof (struct impl_files));
558 ifiles->filename = main_filename;
559 ifiles->next = impl_file_chain;
560 impl_file_chain = ifiles;
564 /* Indicate that this file uses Java-personality exception handling. */
566 handle_pragma_java_exceptions (cpp_reader* dfile ATTRIBUTE_UNUSED )
569 if (c_lex (&x) != CPP_EOF)
570 warning ("junk at end of #pragma GCC java_exceptions");
572 choose_personality_routine (lang_java);
575 /* Issue an error message indicating that the lookup of NAME (an
576 IDENTIFIER_NODE) failed. Returns the ERROR_MARK_NODE. */
579 unqualified_name_lookup_error (tree name)
581 if (IDENTIFIER_OPNAME_P (name))
583 if (name != ansi_opname (ERROR_MARK))
584 error ("`%D' not defined", name);
588 error ("`%D' was not declared in this scope", name);
589 /* Prevent repeated error messages by creating a VAR_DECL with
590 this NAME in the innermost block scope. */
591 if (current_function_decl)
594 decl = build_decl (VAR_DECL, name, error_mark_node);
595 DECL_CONTEXT (decl) = current_function_decl;
596 push_local_binding (name, decl, 0);
600 return error_mark_node;
603 /* Like unqualified_name_lookup_error, but NAME is an unqualified-id
604 used as a function. Returns an appropriate expression for
608 unqualified_fn_lookup_error (tree name)
610 if (processing_template_decl)
612 /* In a template, it is invalid to write "f()" or "f(3)" if no
613 declaration of "f" is available. Historically, G++ and most
614 other compilers accepted that usage since they deferred all name
615 lookup until instantiation time rather than doing unqualified
616 name lookup at template definition time; explain to the user what
619 Note that we have the exact wording of the following message in
620 the manual (trouble.texi, node "Name lookup"), so they need to
622 pedwarn ("there are no arguments to `%D' that depend on a template "
623 "parameter, so a declaration of `%D' must be available",
626 if (!flag_permissive)
631 error ("(if you use `-fpermissive', G++ will accept your code, "
632 "but allowing the use of an undeclared name is "
640 return unqualified_name_lookup_error (name);
644 build_lang_decl (enum tree_code code, tree name, tree type)
648 t = build_decl (code, name, type);
649 retrofit_lang_decl (t);
654 /* Add DECL_LANG_SPECIFIC info to T. Called from build_lang_decl
655 and pushdecl (for functions generated by the backend). */
658 retrofit_lang_decl (tree t)
660 struct lang_decl *ld;
663 if (CAN_HAVE_FULL_LANG_DECL_P (t))
664 size = sizeof (struct lang_decl);
666 size = sizeof (struct lang_decl_flags);
668 ld = GGC_CNEWVAR (struct lang_decl, size);
670 ld->decl_flags.can_be_full = CAN_HAVE_FULL_LANG_DECL_P (t) ? 1 : 0;
671 ld->decl_flags.u1sel = TREE_CODE (t) == NAMESPACE_DECL ? 1 : 0;
672 ld->decl_flags.u2sel = 0;
673 if (ld->decl_flags.can_be_full)
674 ld->u.f.u3sel = TREE_CODE (t) == FUNCTION_DECL ? 1 : 0;
676 DECL_LANG_SPECIFIC (t) = ld;
677 if (current_lang_name == lang_name_cplusplus
678 || decl_linkage (t) == lk_none)
679 SET_DECL_LANGUAGE (t, lang_cplusplus);
680 else if (current_lang_name == lang_name_c)
681 SET_DECL_LANGUAGE (t, lang_c);
682 else if (current_lang_name == lang_name_java)
683 SET_DECL_LANGUAGE (t, lang_java);
686 #ifdef GATHER_STATISTICS
687 tree_node_counts[(int)lang_decl] += 1;
688 tree_node_sizes[(int)lang_decl] += size;
693 cxx_dup_lang_specific_decl (tree node)
696 struct lang_decl *ld;
698 if (! DECL_LANG_SPECIFIC (node))
701 if (!CAN_HAVE_FULL_LANG_DECL_P (node))
702 size = sizeof (struct lang_decl_flags);
704 size = sizeof (struct lang_decl);
705 ld = GGC_NEWVAR (struct lang_decl, size);
706 memcpy (ld, DECL_LANG_SPECIFIC (node), size);
707 DECL_LANG_SPECIFIC (node) = ld;
709 #ifdef GATHER_STATISTICS
710 tree_node_counts[(int)lang_decl] += 1;
711 tree_node_sizes[(int)lang_decl] += size;
715 /* Copy DECL, including any language-specific parts. */
718 copy_decl (tree decl)
722 copy = copy_node (decl);
723 cxx_dup_lang_specific_decl (copy);
727 /* Replace the shared language-specific parts of NODE with a new copy. */
730 copy_lang_type (tree node)
733 struct lang_type *lt;
735 if (! TYPE_LANG_SPECIFIC (node))
738 if (TYPE_LANG_SPECIFIC (node)->u.h.is_lang_type_class)
739 size = sizeof (struct lang_type);
741 size = sizeof (struct lang_type_ptrmem);
742 lt = GGC_NEWVAR (struct lang_type, size);
743 memcpy (lt, TYPE_LANG_SPECIFIC (node), size);
744 TYPE_LANG_SPECIFIC (node) = lt;
746 #ifdef GATHER_STATISTICS
747 tree_node_counts[(int)lang_type] += 1;
748 tree_node_sizes[(int)lang_type] += size;
752 /* Copy TYPE, including any language-specific parts. */
755 copy_type (tree type)
759 copy = copy_node (type);
760 copy_lang_type (copy);
765 cxx_make_type (enum tree_code code)
767 tree t = make_node (code);
769 /* Create lang_type structure. */
770 if (IS_AGGR_TYPE_CODE (code)
771 || code == BOUND_TEMPLATE_TEMPLATE_PARM)
773 struct lang_type *pi = GGC_CNEW (struct lang_type);
775 TYPE_LANG_SPECIFIC (t) = pi;
776 pi->u.c.h.is_lang_type_class = 1;
778 #ifdef GATHER_STATISTICS
779 tree_node_counts[(int)lang_type] += 1;
780 tree_node_sizes[(int)lang_type] += sizeof (struct lang_type);
784 /* Set up some flags that give proper default behavior. */
785 if (IS_AGGR_TYPE_CODE (code))
787 SET_CLASSTYPE_INTERFACE_UNKNOWN_X (t, interface_unknown);
788 CLASSTYPE_INTERFACE_ONLY (t) = interface_only;
791 /* We use TYPE_ALIAS_SET for the CLASSTYPE_MARKED bits. But,
792 TYPE_ALIAS_SET is initialized to -1 by default, so we must
794 TYPE_ALIAS_SET (t) = 0;
800 make_aggr_type (enum tree_code code)
802 tree t = cxx_make_type (code);
804 if (IS_AGGR_TYPE_CODE (code))
805 SET_IS_AGGR_TYPE (t, 1);
810 /* Return the type-qualifier corresponding to the identifier given by
814 cp_type_qual_from_rid (tree rid)
816 if (rid == ridpointers[(int) RID_CONST])
817 return TYPE_QUAL_CONST;
818 else if (rid == ridpointers[(int) RID_VOLATILE])
819 return TYPE_QUAL_VOLATILE;
820 else if (rid == ridpointers[(int) RID_RESTRICT])
821 return TYPE_QUAL_RESTRICT;
824 return TYPE_UNQUALIFIED;