gcc/c-parse.in

   1 /* YACC parser for C syntax and for Objective C.  -*-c-*-
   2    Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996,
   3    1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 /* This file defines the grammar of C and that of Objective C.
  23    @@ifobjc ... @@end_ifobjc  conditionals contain code for Objective C only.
  24    @@ifc ... @@end_ifc  conditionals contain code for C only.
  25    Sed commands in Makefile.in are used to convert this file into
  26    c-parse.y and into objc-parse.y.  */
  27
  28 /* To whomever it may concern: I have heard that such a thing was once
  29    written by AT&T, but I have never seen it.  */
  30
  31 @@ifc
  32 %expect 10 /* shift/reduce conflicts, and no reduce/reduce conflicts.  */
  33 @@end_ifc
  34
  35 %{
  36 #include "config.h"
  37 #include "system.h"
  38 #include "coretypes.h"
  39 #include "tm.h"
  40 #include "tree.h"
  41 #include "input.h"
  42 #include "cpplib.h"
  43 #include "intl.h"
  44 #include "timevar.h"
  45 #include "c-pragma.h"           /* For YYDEBUG definition, and parse_in.  */
  46 #include "c-tree.h"
  47 #include "flags.h"
  48 #include "varray.h"
  49 #include "output.h"
  50 #include "toplev.h"
  51 #include "ggc.h"
  52
  53 @@ifobjc
  54 #include "objc-act.h"
  55 @@end_ifobjc
  56
  57 /* Like YYERROR but do call yyerror.  */
  58 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
  59
  60 /* Like the default stack expander, except (1) use realloc when possible,
  61    (2) impose no hard maxiumum on stack size, (3) REALLY do not use alloca.
  62
  63    Irritatingly, YYSTYPE is defined after this %{ %} block, so we cannot
  64    give malloced_yyvs its proper type.  This is ok since all we need from
  65    it is to be able to free it.  */
  66
  67 static short *malloced_yyss;
  68 static void *malloced_yyvs;
  69
  70 #define yyoverflow(MSG, SS, SSSIZE, VS, VSSIZE, YYSSZ)                  \
  71 do {                                                                    \
  72   size_t newsize;                                                       \
  73   short *newss;                                                         \
  74   YYSTYPE *newvs;                                                       \
  75   newsize = *(YYSSZ) *= 2;                                              \
  76   if (malloced_yyss)                                                    \
  77     {                                                                   \
  78       newss = really_call_realloc (*(SS), newsize * sizeof (short));    \
  79       newvs = really_call_realloc (*(VS), newsize * sizeof (YYSTYPE));  \
  80     }                                                                   \
  81   else                                                                  \
  82     {                                                                   \
  83       newss = really_call_malloc (newsize * sizeof (short));            \
  84       newvs = really_call_malloc (newsize * sizeof (YYSTYPE));          \
  85       if (newss)                                                        \
  86         memcpy (newss, *(SS), (SSSIZE));                                \
  87       if (newvs)                                                        \
  88         memcpy (newvs, *(VS), (VSSIZE));                                \
  89     }                                                                   \
  90   if (!newss || !newvs)                                                 \
  91     {                                                                   \
  92       yyerror (MSG);                                                    \
  93       return 2;                                                         \
  94     }                                                                   \
  95   *(SS) = newss;                                                        \
  96   *(VS) = newvs;                                                        \
  97   malloced_yyss = newss;                                                \
  98   malloced_yyvs = (void *) newvs;                                       \
  99 } while (0)
 100 %}
 101
 102 %start program
 103
 104 %union {long itype; tree ttype; enum tree_code code;
 105         location_t location; }
 106
 107 /* All identifiers that are not reserved words
 108    and are not declared typedefs in the current block */
 109 %token IDENTIFIER
 110
 111 /* All identifiers that are declared typedefs in the current block.
 112    In some contexts, they are treated just like IDENTIFIER,
 113    but they can also serve as typespecs in declarations.  */
 114 %token TYPENAME
 115
 116 /* Reserved words that specify storage class.
 117    yylval contains an IDENTIFIER_NODE which indicates which one.  */
 118 %token SCSPEC                   /* Storage class other than static.  */
 119 %token STATIC                   /* Static storage class.  */
 120
 121 /* Reserved words that specify type.
 122    yylval contains an IDENTIFIER_NODE which indicates which one.  */
 123 %token TYPESPEC
 124
 125 /* Reserved words that qualify type: "const", "volatile", or "restrict".
 126    yylval contains an IDENTIFIER_NODE which indicates which one.  */
 127 %token TYPE_QUAL
 128
 129 /* Character or numeric constants.
 130    yylval is the node for the constant.  */
 131 %token CONSTANT
 132
 133 /* String constants in raw form.
 134    yylval is a STRING_CST node.  */
 135
 136 %token STRING
 137
 138 /* "...", used for functions with variable arglists.  */
 139 %token ELLIPSIS
 140
 141 /* the reserved words */
 142 /* SCO include files test "ASM", so use something else. */
 143 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
 144 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
 145 %token ATTRIBUTE EXTENSION LABEL
 146 %token REALPART IMAGPART VA_ARG CHOOSE_EXPR TYPES_COMPATIBLE_P
 147 %token PTR_VALUE PTR_BASE PTR_EXTENT
 148 %token FUNC_NAME
 149
 150 /* Add precedence rules to solve dangling else s/r conflict */
 151 %nonassoc IF
 152 %nonassoc ELSE
 153
 154 /* Define the operator tokens and their precedences.
 155    The value is an integer because, if used, it is the tree code
 156    to use in the expression made from the operator.  */
 157
 158 %right <code> ASSIGN '='
 159 %right <code> '?' ':'
 160 %left <code> OROR
 161 %left <code> ANDAND
 162 %left <code> '|'
 163 %left <code> '^'
 164 %left <code> '&'
 165 %left <code> EQCOMPARE
 166 %left <code> ARITHCOMPARE
 167 %left <code> LSHIFT RSHIFT
 168 %left <code> '+' '-'
 169 %left <code> '*' '/' '%'
 170 %right <code> UNARY PLUSPLUS MINUSMINUS
 171 %left HYPERUNARY
 172 %left <code> POINTSAT '.' '(' '['
 173
 174 /* The Objective-C keywords.  These are included in C and in
 175    Objective C, so that the token codes are the same in both.  */
 176 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
 177 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
 178 %token AT_THROW AT_TRY AT_CATCH AT_FINALLY AT_SYNCHRONIZED
 179 %token OBJC_STRING
 180
 181 %type <code> unop
 182 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
 183 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
 184
 185 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
 186 %type <ttype> expr_no_commas cast_expr unary_expr primary STRING
 187 %type <ttype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
 188 %type <ttype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
 189 %type <ttype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
 190 %type <ttype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
 191 %type <ttype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
 192 %type <ttype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
 193 %type <ttype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
 194 %type <ttype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
 195 %type <ttype> declspecs_ts declspecs_nots
 196 %type <ttype> declspecs_ts_nosa declspecs_nots_nosa
 197 %type <ttype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
 198 %type <ttype> maybe_type_quals_attrs typespec_nonattr typespec_attr
 199 %type <ttype> typespec_reserved_nonattr typespec_reserved_attr
 200 %type <ttype> typespec_nonreserved_nonattr
 201
 202 %type <ttype> scspec SCSPEC STATIC TYPESPEC TYPE_QUAL maybe_type_qual
 203 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
 204 %type <ttype> init maybeasm
 205 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
 206 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
 207 %type <ttype> any_word extension
 208
 209 %type <ttype> compstmt compstmt_start compstmt_nostart compstmt_primary_start
 210 %type <ttype> do_stmt_start poplevel stmt label
 211
 212 %type <ttype> c99_block_start c99_block_end
 213 %type <ttype> declarator
 214 %type <ttype> notype_declarator after_type_declarator
 215 %type <ttype> parm_declarator
 216 %type <ttype> parm_declarator_starttypename parm_declarator_nostarttypename
 217 %type <ttype> array_declarator
 218
 219 %type <ttype> structsp_attr structsp_nonattr
 220 %type <ttype> component_decl_list component_decl_list2
 221 %type <ttype> component_decl components components_notype component_declarator
 222 %type <ttype> component_notype_declarator
 223 %type <ttype> enumlist enumerator
 224 %type <ttype> struct_head union_head enum_head
 225 %type <ttype> typename absdcl absdcl1 absdcl1_ea absdcl1_noea
 226 %type <ttype> direct_absdcl1 absdcl_maybe_attribute
 227 %type <ttype> xexpr parms parm firstparm identifiers
 228
 229 %type <ttype> parmlist parmlist_1 parmlist_2
 230 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
 231 %type <ttype> identifiers_or_typenames
 232
 233 %type <itype> setspecs setspecs_fp
 234
 235 %type <location> save_location
 236 \f
 237 @@ifobjc
 238 /* the Objective-C nonterminals */
 239
 240 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
 241 %type <ttype> methoddecl unaryselector keywordselector selector
 242 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
 243 %type <ttype> keywordexpr keywordarglist keywordarg
 244 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
 245 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
 246 %type <ttype> non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
 247
 248 %type <ttype> CLASSNAME OBJECTNAME OBJC_STRING
 249
 250 %type <ttype> superclass
 251 %type <itype> objc_try_catch_stmt objc_finally_block
 252 @@end_ifobjc
 253 \f
 254 %{
 255 /* Number of statements (loosely speaking) and compound statements
 256    seen so far.  */
 257 static int stmt_count;
 258 static int compstmt_count;
 259
 260 /* Input location of the end of the body of last simple_if;
 261    used by the stmt-rule immediately after simple_if returns.  */
 262 static location_t if_stmt_locus;
 263
 264
 265 /* List of types and structure classes of the current declaration.  */
 266 static GTY(()) tree current_declspecs;
 267 static GTY(()) tree prefix_attributes;
 268
 269 /* List of all the attributes applying to the identifier currently being
 270    declared; includes prefix_attributes and possibly some more attributes
 271    just after a comma.  */
 272 static GTY(()) tree all_prefix_attributes;
 273
 274 /* Stack of saved values of current_declspecs, prefix_attributes and
 275    all_prefix_attributes.  */
 276 static GTY(()) tree declspec_stack;
 277
 278 /* PUSH_DECLSPEC_STACK is called from setspecs; POP_DECLSPEC_STACK
 279    should be called from the productions making use of setspecs.  */
 280 #define PUSH_DECLSPEC_STACK                                              \
 281   do {                                                                   \
 282     declspec_stack = tree_cons (build_tree_list (prefix_attributes,      \
 283                                                  all_prefix_attributes), \
 284                                 current_declspecs,                       \
 285                                 declspec_stack);                         \
 286   } while (0)
 287
 288 #define POP_DECLSPEC_STACK                                              \
 289   do {                                                                  \
 290     current_declspecs = TREE_VALUE (declspec_stack);                    \
 291     prefix_attributes = TREE_PURPOSE (TREE_PURPOSE (declspec_stack));   \
 292     all_prefix_attributes = TREE_VALUE (TREE_PURPOSE (declspec_stack)); \
 293     declspec_stack = TREE_CHAIN (declspec_stack);                       \
 294   } while (0)
 295
 296 /* For __extension__, save/restore the warning flags which are
 297    controlled by __extension__.  */
 298 #define SAVE_EXT_FLAGS()                        \
 299         size_int (pedantic                      \
 300                   | (warn_pointer_arith << 1)   \
 301                   | (warn_traditional << 2)     \
 302                   | (flag_iso << 3))
 303
 304 #define RESTORE_EXT_FLAGS(tval)                 \
 305   do {                                          \
 306     int val = tree_low_cst (tval, 0);           \
 307     pedantic = val & 1;                         \
 308     warn_pointer_arith = (val >> 1) & 1;        \
 309     warn_traditional = (val >> 2) & 1;          \
 310     flag_iso = (val >> 3) & 1;                  \
 311   } while (0)
 312
 313 @@ifobjc
 314 /* Objective-C specific parser/lexer information */
 315
 316 static enum tree_code objc_inherit_code;
 317 static int objc_pq_context = 0, objc_public_flag = 0;
 318
 319 /* The following flag is needed to contextualize ObjC lexical analysis.
 320    In some cases (e.g., 'int NSObject;'), it is undesirable to bind
 321    an identifier to an ObjC class, even if a class with that name
 322    exists.  */
 323 static int objc_need_raw_identifier;
 324 #define OBJC_NEED_RAW_IDENTIFIER(VAL)   objc_need_raw_identifier = VAL
 325 @@end_ifobjc
 326
 327 @@ifc
 328 #define OBJC_NEED_RAW_IDENTIFIER(VAL)   /* nothing */
 329 @@end_ifc
 330
 331 static bool parsing_iso_function_signature;
 332
 333 /* Tell yyparse how to print a token's value, if yydebug is set.  */
 334
 335 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
 336
 337 static void yyprint (FILE *, int, YYSTYPE);
 338 static void yyerror (const char *);
 339 static int yylexname (void);
 340 static inline int _yylex (void);
 341 static int  yylex (void);
 342 static void init_reswords (void);
 343
 344   /* Initialisation routine for this file.  */
 345 void
 346 c_parse_init (void)
 347 {
 348   init_reswords ();
 349 }
 350
 351 %}
 352 \f
 353 %%
 354 program: /* empty */
 355                 { if (pedantic)
 356                     pedwarn ("ISO C forbids an empty source file");
 357                 }
 358         | extdefs
 359         ;
 360
 361 /* the reason for the strange actions in this rule
 362  is so that notype_initdecls when reached via datadef
 363  can find a valid list of type and sc specs in $0. */
 364
 365 extdefs:
 366         {$<ttype>$ = NULL_TREE; } extdef
 367         | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
 368         ;
 369
 370 extdef:
 371         extdef_1
 372         { parsing_iso_function_signature = false; } /* Reset after any external definition.  */
 373         ;
 374
 375 extdef_1:
 376         fndef
 377         | datadef
 378 @@ifobjc
 379         | objcdef
 380 @@end_ifobjc
 381         | ASM_KEYWORD '(' expr ')' ';'
 382                 { STRIP_NOPS ($3);
 383                   if ((TREE_CODE ($3) == ADDR_EXPR
 384                        && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
 385                       || TREE_CODE ($3) == STRING_CST)
 386                     assemble_asm ($3);
 387                   else
 388                     error ("argument of `asm' is not a constant string"); }
 389         | extension extdef
 390                 { RESTORE_EXT_FLAGS ($1); }
 391         ;
 392
 393 datadef:
 394           setspecs notype_initdecls ';'
 395                 { if (pedantic)
 396                     error ("ISO C forbids data definition with no type or storage class");
 397                   else
 398                     warning ("data definition has no type or storage class");
 399
 400                   POP_DECLSPEC_STACK; }
 401         | declspecs_nots setspecs notype_initdecls ';'
 402                 { POP_DECLSPEC_STACK; }
 403         | declspecs_ts setspecs initdecls ';'
 404                 { POP_DECLSPEC_STACK; }
 405         | declspecs ';'
 406           { shadow_tag ($1); }
 407         | error ';'
 408         | error '}'
 409         | ';'
 410                 { if (pedantic)
 411                     pedwarn ("ISO C does not allow extra `;' outside of a function"); }
 412         ;
 413 \f
 414 fndef:
 415           declspecs_ts setspecs declarator
 416                 { if (! start_function (current_declspecs, $3,
 417                                         all_prefix_attributes))
 418                     YYERROR1;
 419                 }
 420           old_style_parm_decls save_location
 421                 { DECL_SOURCE_LOCATION (current_function_decl) = $6;
 422                   store_parm_decls (); }
 423           compstmt_or_error
 424                 { finish_function ();
 425                   POP_DECLSPEC_STACK; }
 426         | declspecs_ts setspecs declarator error
 427                 { POP_DECLSPEC_STACK; }
 428         | declspecs_nots setspecs notype_declarator
 429                 { if (! start_function (current_declspecs, $3,
 430                                         all_prefix_attributes))
 431                     YYERROR1;
 432                 }
 433           old_style_parm_decls save_location
 434                 { DECL_SOURCE_LOCATION (current_function_decl) = $6;
 435                   store_parm_decls (); }
 436           compstmt_or_error
 437                 { finish_function ();
 438                   POP_DECLSPEC_STACK; }
 439         | declspecs_nots setspecs notype_declarator error
 440                 { POP_DECLSPEC_STACK; }
 441         | setspecs notype_declarator
 442                 { if (! start_function (NULL_TREE, $2,
 443                                         all_prefix_attributes))
 444                     YYERROR1;
 445                 }
 446           old_style_parm_decls save_location
 447                 { DECL_SOURCE_LOCATION (current_function_decl) = $5;
 448                   store_parm_decls (); }
 449           compstmt_or_error
 450                 { finish_function ();
 451                   POP_DECLSPEC_STACK; }
 452         | setspecs notype_declarator error
 453                 { POP_DECLSPEC_STACK; }
 454         ;
 455
 456 identifier:
 457         IDENTIFIER
 458         | TYPENAME
 459 @@ifobjc
 460         | OBJECTNAME
 461         | CLASSNAME
 462 @@end_ifobjc
 463         ;
 464
 465 unop:     '&'
 466                 { $$ = ADDR_EXPR; }
 467         | '-'
 468                 { $$ = NEGATE_EXPR; }
 469         | '+'
 470                 { $$ = CONVERT_EXPR;
 471 @@ifc
 472   if (warn_traditional && !in_system_header)
 473     warning ("traditional C rejects the unary plus operator");
 474 @@end_ifc
 475                 }
 476         | PLUSPLUS
 477                 { $$ = PREINCREMENT_EXPR; }
 478         | MINUSMINUS
 479                 { $$ = PREDECREMENT_EXPR; }
 480         | '~'
 481                 { $$ = BIT_NOT_EXPR; }
 482         | '!'
 483                 { $$ = TRUTH_NOT_EXPR; }
 484         ;
 485
 486 expr:   nonnull_exprlist
 487                 { $$ = build_compound_expr ($1); }
 488         ;
 489
 490 exprlist:
 491           /* empty */
 492                 { $$ = NULL_TREE; }
 493         | nonnull_exprlist
 494         ;
 495
 496 nonnull_exprlist:
 497         expr_no_commas
 498                 { $$ = build_tree_list (NULL_TREE, $1); }
 499         | nonnull_exprlist ',' expr_no_commas
 500                 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
 501         ;
 502
 503 unary_expr:
 504         primary
 505         | '*' cast_expr   %prec UNARY
 506                 { $$ = build_indirect_ref ($2, "unary *"); }
 507         /* __extension__ turns off -pedantic for following primary.  */
 508         | extension cast_expr     %prec UNARY
 509                 { $$ = $2;
 510                   RESTORE_EXT_FLAGS ($1); }
 511         | unop cast_expr  %prec UNARY
 512                 { $$ = build_unary_op ($1, $2, 0);
 513                   overflow_warning ($$); }
 514         /* Refer to the address of a label as a pointer.  */
 515         | ANDAND identifier
 516                 { $$ = finish_label_address_expr ($2); }
 517         | sizeof unary_expr  %prec UNARY
 518                 { skip_evaluation--;
 519                   if (TREE_CODE ($2) == COMPONENT_REF
 520                       && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
 521                     error ("`sizeof' applied to a bit-field");
 522                   $$ = c_sizeof (TREE_TYPE ($2)); }
 523         | sizeof '(' typename ')'  %prec HYPERUNARY
 524                 { skip_evaluation--;
 525                   $$ = c_sizeof (groktypename ($3)); }
 526         | alignof unary_expr  %prec UNARY
 527                 { skip_evaluation--;
 528                   $$ = c_alignof_expr ($2); }
 529         | alignof '(' typename ')'  %prec HYPERUNARY
 530                 { skip_evaluation--;
 531                   $$ = c_alignof (groktypename ($3)); }
 532         | REALPART cast_expr %prec UNARY
 533                 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
 534         | IMAGPART cast_expr %prec UNARY
 535                 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
 536         ;
 537
 538 sizeof:
 539         SIZEOF { skip_evaluation++; }
 540         ;
 541
 542 alignof:
 543         ALIGNOF { skip_evaluation++; }
 544         ;
 545
 546 typeof:
 547         TYPEOF { skip_evaluation++; }
 548         ;
 549
 550 cast_expr:
 551         unary_expr
 552         | '(' typename ')' cast_expr  %prec UNARY
 553                 { $$ = c_cast_expr ($2, $4); }
 554         ;
 555
 556 expr_no_commas:
 557           cast_expr
 558         | expr_no_commas '+' expr_no_commas
 559                 { $$ = parser_build_binary_op ($2, $1, $3); }
 560         | expr_no_commas '-' expr_no_commas
 561                 { $$ = parser_build_binary_op ($2, $1, $3); }
 562         | expr_no_commas '*' expr_no_commas
 563                 { $$ = parser_build_binary_op ($2, $1, $3); }
 564         | expr_no_commas '/' expr_no_commas
 565                 { $$ = parser_build_binary_op ($2, $1, $3); }
 566         | expr_no_commas '%' expr_no_commas
 567                 { $$ = parser_build_binary_op ($2, $1, $3); }
 568         | expr_no_commas LSHIFT expr_no_commas
 569                 { $$ = parser_build_binary_op ($2, $1, $3); }
 570         | expr_no_commas RSHIFT expr_no_commas
 571                 { $$ = parser_build_binary_op ($2, $1, $3); }
 572         | expr_no_commas ARITHCOMPARE expr_no_commas
 573                 { $$ = parser_build_binary_op ($2, $1, $3); }
 574         | expr_no_commas EQCOMPARE expr_no_commas
 575                 { $$ = parser_build_binary_op ($2, $1, $3); }
 576         | expr_no_commas '&' expr_no_commas
 577                 { $$ = parser_build_binary_op ($2, $1, $3); }
 578         | expr_no_commas '|' expr_no_commas
 579                 { $$ = parser_build_binary_op ($2, $1, $3); }
 580         | expr_no_commas '^' expr_no_commas
 581                 { $$ = parser_build_binary_op ($2, $1, $3); }
 582         | expr_no_commas ANDAND
 583                 { $1 = c_common_truthvalue_conversion
 584                     (default_conversion ($1));
 585                   skip_evaluation += $1 == truthvalue_false_node; }
 586           expr_no_commas
 587                 { skip_evaluation -= $1 == truthvalue_false_node;
 588                   $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
 589         | expr_no_commas OROR
 590                 { $1 = c_common_truthvalue_conversion
 591                     (default_conversion ($1));
 592                   skip_evaluation += $1 == truthvalue_true_node; }
 593           expr_no_commas
 594                 { skip_evaluation -= $1 == truthvalue_true_node;
 595                   $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
 596         | expr_no_commas '?'
 597                 { $1 = c_common_truthvalue_conversion
 598                     (default_conversion ($1));
 599                   skip_evaluation += $1 == truthvalue_false_node; }
 600           expr ':'
 601                 { skip_evaluation += (($1 == truthvalue_true_node)
 602                                       - ($1 == truthvalue_false_node)); }
 603           expr_no_commas
 604                 { skip_evaluation -= $1 == truthvalue_true_node;
 605                   $$ = build_conditional_expr ($1, $4, $7); }
 606         | expr_no_commas '?'
 607                 { if (pedantic)
 608                     pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
 609                   /* Make sure first operand is calculated only once.  */
 610                   $<ttype>2 = save_expr ($1);
 611                   $1 = c_common_truthvalue_conversion
 612                     (default_conversion ($<ttype>2));
 613                   skip_evaluation += $1 == truthvalue_true_node; }
 614           ':' expr_no_commas
 615                 { skip_evaluation -= $1 == truthvalue_true_node;
 616                   $$ = build_conditional_expr ($1, $<ttype>2, $5); }
 617         | expr_no_commas '=' expr_no_commas
 618                 { char class;
 619                   $$ = build_modify_expr ($1, NOP_EXPR, $3);
 620                   class = TREE_CODE_CLASS (TREE_CODE ($$));
 621                   if (IS_EXPR_CODE_CLASS (class))
 622                     C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
 623                 }
 624         | expr_no_commas ASSIGN expr_no_commas
 625                 { char class;
 626                   $$ = build_modify_expr ($1, $2, $3);
 627                   /* This inhibits warnings in
 628                      c_common_truthvalue_conversion.  */
 629                   class = TREE_CODE_CLASS (TREE_CODE ($$));
 630                   if (IS_EXPR_CODE_CLASS (class))
 631                     C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
 632                 }
 633         ;
 634
 635 primary:
 636         IDENTIFIER
 637                 {
 638                   if (yychar == YYEMPTY)
 639                     yychar = YYLEX;
 640                   $$ = build_external_ref ($1, yychar == '(');
 641                 }
 642         | CONSTANT
 643         | STRING
 644         | FUNC_NAME
 645                 { $$ = fname_decl (C_RID_CODE ($$), $$); }
 646         | '(' typename ')' '{'
 647                 { start_init (NULL_TREE, NULL, 0);
 648                   $2 = groktypename ($2);
 649                   really_start_incremental_init ($2); }
 650           initlist_maybe_comma '}'  %prec UNARY
 651                 { tree constructor = pop_init_level (0);
 652                   tree type = $2;
 653                   finish_init ();
 654
 655                   if (pedantic && ! flag_isoc99)
 656                     pedwarn ("ISO C89 forbids compound literals");
 657                   $$ = build_compound_literal (type, constructor);
 658                 }
 659         | '(' expr ')'
 660                 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
 661                   if (IS_EXPR_CODE_CLASS (class))
 662                     C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
 663                   $$ = $2; }
 664         | '(' error ')'
 665                 { $$ = error_mark_node; }
 666         | compstmt_primary_start compstmt_nostart ')'
 667                  { tree saved_last_tree;
 668
 669                    if (pedantic)
 670                      pedwarn ("ISO C forbids braced-groups within expressions");
 671                   saved_last_tree = COMPOUND_BODY ($1);
 672                   RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
 673                   last_tree = saved_last_tree;
 674                   TREE_CHAIN (last_tree) = NULL_TREE;
 675                   if (!last_expr_type)
 676                     last_expr_type = void_type_node;
 677                   $$ = build1 (STMT_EXPR, last_expr_type, $1);
 678                   TREE_SIDE_EFFECTS ($$) = 1;
 679                 }
 680         | compstmt_primary_start error ')'
 681                 {
 682                   last_tree = COMPOUND_BODY ($1);
 683                   TREE_CHAIN (last_tree) = NULL_TREE;
 684                   $$ = error_mark_node;
 685                 }
 686         | primary '(' exprlist ')'   %prec '.'
 687                 { $$ = build_function_call ($1, $3); }
 688         | VA_ARG '(' expr_no_commas ',' typename ')'
 689                 { $$ = build_va_arg ($3, groktypename ($5)); }
 690
 691       | CHOOSE_EXPR '(' expr_no_commas ',' expr_no_commas ',' expr_no_commas ')'
 692                 {
 693                   tree c;
 694
 695                   c = fold ($3);
 696                   STRIP_NOPS (c);
 697                   if (TREE_CODE (c) != INTEGER_CST)
 698                     error ("first argument to __builtin_choose_expr not a constant");
 699                   $$ = integer_zerop (c) ? $7 : $5;
 700                 }
 701       | TYPES_COMPATIBLE_P '(' typename ',' typename ')'
 702                 {
 703                   tree e1, e2;
 704
 705                   e1 = TYPE_MAIN_VARIANT (groktypename ($3));
 706                   e2 = TYPE_MAIN_VARIANT (groktypename ($5));
 707
 708                   $$ = comptypes (e1, e2, COMPARE_STRICT)
 709                     ? build_int_2 (1, 0) : build_int_2 (0, 0);
 710                 }
 711         | primary '[' expr ']'   %prec '.'
 712                 { $$ = build_array_ref ($1, $3); }
 713         | primary '.' identifier
 714                 {
 715 @@ifobjc
 716                     if (!is_public ($1, $3))
 717                       $$ = error_mark_node;
 718                     else
 719 @@end_ifobjc
 720                       $$ = build_component_ref ($1, $3);
 721                 }
 722         | primary POINTSAT identifier
 723                 {
 724                   tree expr = build_indirect_ref ($1, "->");
 725
 726 @@ifobjc
 727                       if (!is_public (expr, $3))
 728                         $$ = error_mark_node;
 729                       else
 730 @@end_ifobjc
 731                         $$ = build_component_ref (expr, $3);
 732                 }
 733         | primary PLUSPLUS
 734                 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
 735         | primary MINUSMINUS
 736                 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
 737 @@ifobjc
 738         | objcmessageexpr
 739                 { $$ = build_message_expr ($1); }
 740         | objcselectorexpr
 741                 { $$ = build_selector_expr ($1); }
 742         | objcprotocolexpr
 743                 { $$ = build_protocol_expr ($1); }
 744         | objcencodeexpr
 745                 { $$ = build_encode_expr ($1); }
 746         | OBJC_STRING
 747                 { $$ = build_objc_string_object ($1); }
 748 @@end_ifobjc
 749         ;
 750
 751 old_style_parm_decls:
 752         old_style_parm_decls_1
 753         {
 754           parsing_iso_function_signature = false; /* Reset after decls.  */
 755         }
 756         ;
 757
 758 old_style_parm_decls_1:
 759         /* empty */
 760         {
 761           if (warn_traditional && !in_system_header
 762               && parsing_iso_function_signature)
 763             warning ("traditional C rejects ISO C style function definitions");
 764           if (warn_old_style_definition && !in_system_header
 765               && !parsing_iso_function_signature)
 766             warning ("old-style parameter declaration");
 767           parsing_iso_function_signature = false; /* Reset after warning.  */
 768         }
 769         | datadecls
 770         {
 771           if (warn_old_style_definition && !in_system_header)
 772             warning ("old-style parameter declaration");
 773         }
 774         ;
 775
 776 /* The following are analogous to lineno_decl, decls and decl
 777    except that they do not allow nested functions.
 778    They are used for old-style parm decls.  */
 779 lineno_datadecl:
 780           save_location datadecl
 781                 { }
 782         ;
 783
 784 datadecls:
 785         lineno_datadecl
 786         | errstmt
 787         | datadecls lineno_datadecl
 788         | lineno_datadecl errstmt
 789         ;
 790
 791 /* We don't allow prefix attributes here because they cause reduce/reduce
 792    conflicts: we can't know whether we're parsing a function decl with
 793    attribute suffix, or function defn with attribute prefix on first old
 794    style parm.  */
 795 datadecl:
 796         declspecs_ts_nosa setspecs initdecls ';'
 797                 { POP_DECLSPEC_STACK; }
 798         | declspecs_nots_nosa setspecs notype_initdecls ';'
 799                 { POP_DECLSPEC_STACK; }
 800         | declspecs_ts_nosa ';'
 801                 { shadow_tag_warned ($1, 1);
 802                   pedwarn ("empty declaration"); }
 803         | declspecs_nots_nosa ';'
 804                 { pedwarn ("empty declaration"); }
 805         ;
 806
 807 /* This combination which saves a lineno before a decl
 808    is the normal thing to use, rather than decl itself.
 809    This is to avoid shift/reduce conflicts in contexts
 810    where statement labels are allowed.  */
 811 lineno_decl:
 812           save_location decl
 813                 { }
 814         ;
 815
 816 /* records the type and storage class specs to use for processing
 817    the declarators that follow.
 818    Maintains a stack of outer-level values of current_declspecs,
 819    for the sake of parm declarations nested in function declarators.  */
 820 setspecs: /* empty */
 821                 { pending_xref_error ();
 822                   PUSH_DECLSPEC_STACK;
 823                   split_specs_attrs ($<ttype>0,
 824                                      &current_declspecs, &prefix_attributes);
 825                   all_prefix_attributes = prefix_attributes; }
 826         ;
 827
 828 /* Possibly attributes after a comma, which should reset all_prefix_attributes
 829    to prefix_attributes with these ones chained on the front.  */
 830 maybe_resetattrs:
 831           maybe_attribute
 832                 { all_prefix_attributes = chainon ($1, prefix_attributes); }
 833         ;
 834
 835 decl:
 836         declspecs_ts setspecs initdecls ';'
 837                 { POP_DECLSPEC_STACK; }
 838         | declspecs_nots setspecs notype_initdecls ';'
 839                 { POP_DECLSPEC_STACK; }
 840         | declspecs_ts setspecs nested_function
 841                 { POP_DECLSPEC_STACK; }
 842         | declspecs_nots setspecs notype_nested_function
 843                 { POP_DECLSPEC_STACK; }
 844         | declspecs ';'
 845                 { shadow_tag ($1); }
 846         | extension decl
 847                 { RESTORE_EXT_FLAGS ($1); }
 848         ;
 849
 850 /* A list of declaration specifiers.  These are:
 851
 852    - Storage class specifiers (scspec), which for GCC currently includes
 853    function specifiers ("inline").
 854
 855    - Type specifiers (typespec_*).
 856
 857    - Type qualifiers (TYPE_QUAL).
 858
 859    - Attribute specifier lists (attributes).
 860
 861    These are stored as a TREE_LIST; the head of the list is the last
 862    item in the specifier list.  Each entry in the list has either a
 863    TREE_PURPOSE that is an attribute specifier list, or a TREE_VALUE that
 864    is a single other specifier or qualifier; and a TREE_CHAIN that is the
 865    rest of the list.  TREE_STATIC is set on the list if something other
 866    than a storage class specifier or attribute has been seen; this is used
 867    to warn for the obsolescent usage of storage class specifiers other than
 868    at the start of the list.  (Doing this properly would require function
 869    specifiers to be handled separately from storage class specifiers.)
 870
 871    The various cases below are classified according to:
 872
 873    (a) Whether a storage class specifier is included or not; some
 874    places in the grammar disallow storage class specifiers (_sc or _nosc).
 875
 876    (b) Whether a type specifier has been seen; after a type specifier,
 877    a typedef name is an identifier to redeclare (_ts or _nots).
 878
 879    (c) Whether the list starts with an attribute; in certain places,
 880    the grammar requires specifiers that don't start with an attribute
 881    (_sa or _nosa).
 882
 883    (d) Whether the list ends with an attribute (or a specifier such that
 884    any following attribute would have been parsed as part of that specifier);
 885    this avoids shift-reduce conflicts in the parsing of attributes
 886    (_ea or _noea).
 887
 888    TODO:
 889
 890    (i) Distinguish between function specifiers and storage class specifiers,
 891    at least for the purpose of warnings about obsolescent usage.
 892
 893    (ii) Halve the number of productions here by eliminating the _sc/_nosc
 894    distinction and instead checking where required that storage class
 895    specifiers aren't present.  */
 896
 897 /* Declspecs which contain at least one type specifier or typedef name.
 898    (Just `const' or `volatile' is not enough.)
 899    A typedef'd name following these is taken as a name to be declared.
 900    Declspecs have a non-NULL TREE_VALUE, attributes do not.  */
 901
 902 declspecs_nosc_nots_nosa_noea:
 903           TYPE_QUAL
 904                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
 905                   TREE_STATIC ($$) = 1; }
 906         | declspecs_nosc_nots_nosa_noea TYPE_QUAL
 907                 { $$ = tree_cons (NULL_TREE, $2, $1);
 908                   TREE_STATIC ($$) = 1; }
 909         | declspecs_nosc_nots_nosa_ea TYPE_QUAL
 910                 { $$ = tree_cons (NULL_TREE, $2, $1);
 911                   TREE_STATIC ($$) = 1; }
 912         ;
 913
 914 declspecs_nosc_nots_nosa_ea:
 915           declspecs_nosc_nots_nosa_noea attributes
 916                 { $$ = tree_cons ($2, NULL_TREE, $1);
 917                   TREE_STATIC ($$) = TREE_STATIC ($1); }
 918         ;
 919
 920 declspecs_nosc_nots_sa_noea:
 921           declspecs_nosc_nots_sa_noea TYPE_QUAL
 922                 { $$ = tree_cons (NULL_TREE, $2, $1);
 923                   TREE_STATIC ($$) = 1; }
 924         | declspecs_nosc_nots_sa_ea TYPE_QUAL
 925                 { $$ = tree_cons (NULL_TREE, $2, $1);
 926                   TREE_STATIC ($$) = 1; }
 927         ;
 928
 929 declspecs_nosc_nots_sa_ea:
 930           attributes
 931                 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE);
 932                   TREE_STATIC ($$) = 0; }
 933         | declspecs_nosc_nots_sa_noea attributes
 934                 { $$ = tree_cons ($2, NULL_TREE, $1);
 935                   TREE_STATIC ($$) = TREE_STATIC ($1); }
 936         ;
 937
 938 declspecs_nosc_ts_nosa_noea:
 939           typespec_nonattr
 940                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
 941                   TREE_STATIC ($$) = 1; }
 942         | declspecs_nosc_ts_nosa_noea TYPE_QUAL
 943                 { $$ = tree_cons (NULL_TREE, $2, $1);
 944                   TREE_STATIC ($$) = 1; }
 945         | declspecs_nosc_ts_nosa_ea TYPE_QUAL
 946                 { $$ = tree_cons (NULL_TREE, $2, $1);
 947                   TREE_STATIC ($$) = 1; }
 948         | declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
 949                 { $$ = tree_cons (NULL_TREE, $2, $1);
 950                   TREE_STATIC ($$) = 1; }
 951         | declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
 952                 { $$ = tree_cons (NULL_TREE, $2, $1);
 953                   TREE_STATIC ($$) = 1; }
 954         | declspecs_nosc_nots_nosa_noea typespec_nonattr
 955                 { $$ = tree_cons (NULL_TREE, $2, $1);
 956                   TREE_STATIC ($$) = 1; }
 957         | declspecs_nosc_nots_nosa_ea typespec_nonattr
 958                 { $$ = tree_cons (NULL_TREE, $2, $1);
 959                   TREE_STATIC ($$) = 1; }
 960         ;
 961
 962 declspecs_nosc_ts_nosa_ea:
 963           typespec_attr
 964                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
 965                   TREE_STATIC ($$) = 1; }
 966         | declspecs_nosc_ts_nosa_noea attributes
 967                 { $$ = tree_cons ($2, NULL_TREE, $1);
 968                   TREE_STATIC ($$) = TREE_STATIC ($1); }
 969         | declspecs_nosc_ts_nosa_noea typespec_reserved_attr
 970                 { $$ = tree_cons (NULL_TREE, $2, $1);
 971                   TREE_STATIC ($$) = 1; }
 972         | declspecs_nosc_ts_nosa_ea typespec_reserved_attr
 973                 { $$ = tree_cons (NULL_TREE, $2, $1);
 974                   TREE_STATIC ($$) = 1; }
 975         | declspecs_nosc_nots_nosa_noea typespec_attr
 976                 { $$ = tree_cons (NULL_TREE, $2, $1);
 977                   TREE_STATIC ($$) = 1; }
 978         | declspecs_nosc_nots_nosa_ea typespec_attr
 979                 { $$ = tree_cons (NULL_TREE, $2, $1);
 980                   TREE_STATIC ($$) = 1; }
 981         ;
 982
 983 declspecs_nosc_ts_sa_noea:
 984           declspecs_nosc_ts_sa_noea TYPE_QUAL
 985                 { $$ = tree_cons (NULL_TREE, $2, $1);
 986                   TREE_STATIC ($$) = 1; }
 987         | declspecs_nosc_ts_sa_ea TYPE_QUAL
 988                 { $$ = tree_cons (NULL_TREE, $2, $1);
 989                   TREE_STATIC ($$) = 1; }
 990         | declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
 991                 { $$ = tree_cons (NULL_TREE, $2, $1);
 992                   TREE_STATIC ($$) = 1; }
 993         | declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
 994                 { $$ = tree_cons (NULL_TREE, $2, $1);
 995                   TREE_STATIC ($$) = 1; }
 996         | declspecs_nosc_nots_sa_noea typespec_nonattr
 997                 { $$ = tree_cons (NULL_TREE, $2, $1);
 998                   TREE_STATIC ($$) = 1; }
 999         | declspecs_nosc_nots_sa_ea typespec_nonattr
1000                 { $$ = tree_cons (NULL_TREE, $2, $1);
1001                   TREE_STATIC ($$) = 1; }
1002         ;
1003
1004 declspecs_nosc_ts_sa_ea:
1005           declspecs_nosc_ts_sa_noea attributes
1006                 { $$ = tree_cons ($2, NULL_TREE, $1);
1007                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1008         | declspecs_nosc_ts_sa_noea typespec_reserved_attr
1009                 { $$ = tree_cons (NULL_TREE, $2, $1);
1010                   TREE_STATIC ($$) = 1; }
1011         | declspecs_nosc_ts_sa_ea typespec_reserved_attr
1012                 { $$ = tree_cons (NULL_TREE, $2, $1);
1013                   TREE_STATIC ($$) = 1; }
1014         | declspecs_nosc_nots_sa_noea typespec_attr
1015                 { $$ = tree_cons (NULL_TREE, $2, $1);
1016                   TREE_STATIC ($$) = 1; }
1017         | declspecs_nosc_nots_sa_ea typespec_attr
1018                 { $$ = tree_cons (NULL_TREE, $2, $1);
1019                   TREE_STATIC ($$) = 1; }
1020         ;
1021
1022 declspecs_sc_nots_nosa_noea:
1023           scspec
1024                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1025                   TREE_STATIC ($$) = 0; }
1026         | declspecs_sc_nots_nosa_noea TYPE_QUAL
1027                 { $$ = tree_cons (NULL_TREE, $2, $1);
1028                   TREE_STATIC ($$) = 1; }
1029         | declspecs_sc_nots_nosa_ea TYPE_QUAL
1030                 { $$ = tree_cons (NULL_TREE, $2, $1);
1031                   TREE_STATIC ($$) = 1; }
1032         | declspecs_nosc_nots_nosa_noea scspec
1033                 { if (extra_warnings && TREE_STATIC ($1))
1034                     warning ("`%s' is not at beginning of declaration",
1035                              IDENTIFIER_POINTER ($2));
1036                   $$ = tree_cons (NULL_TREE, $2, $1);
1037                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1038         | declspecs_nosc_nots_nosa_ea scspec
1039                 { if (extra_warnings && TREE_STATIC ($1))
1040                     warning ("`%s' is not at beginning of declaration",
1041                              IDENTIFIER_POINTER ($2));
1042                   $$ = tree_cons (NULL_TREE, $2, $1);
1043                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1044         | declspecs_sc_nots_nosa_noea scspec
1045                 { if (extra_warnings && TREE_STATIC ($1))
1046                     warning ("`%s' is not at beginning of declaration",
1047                              IDENTIFIER_POINTER ($2));
1048                   $$ = tree_cons (NULL_TREE, $2, $1);
1049                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1050         | declspecs_sc_nots_nosa_ea scspec
1051                 { if (extra_warnings && TREE_STATIC ($1))
1052                     warning ("`%s' is not at beginning of declaration",
1053                              IDENTIFIER_POINTER ($2));
1054                   $$ = tree_cons (NULL_TREE, $2, $1);
1055                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1056         ;
1057
1058 declspecs_sc_nots_nosa_ea:
1059           declspecs_sc_nots_nosa_noea attributes
1060                 { $$ = tree_cons ($2, NULL_TREE, $1);
1061                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1062         ;
1063
1064 declspecs_sc_nots_sa_noea:
1065           declspecs_sc_nots_sa_noea TYPE_QUAL
1066                 { $$ = tree_cons (NULL_TREE, $2, $1);
1067                   TREE_STATIC ($$) = 1; }
1068         | declspecs_sc_nots_sa_ea TYPE_QUAL
1069                 { $$ = tree_cons (NULL_TREE, $2, $1);
1070                   TREE_STATIC ($$) = 1; }
1071         | declspecs_nosc_nots_sa_noea scspec
1072                 { if (extra_warnings && TREE_STATIC ($1))
1073                     warning ("`%s' is not at beginning of declaration",
1074                              IDENTIFIER_POINTER ($2));
1075                   $$ = tree_cons (NULL_TREE, $2, $1);
1076                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1077         | declspecs_nosc_nots_sa_ea scspec
1078                 { if (extra_warnings && TREE_STATIC ($1))
1079                     warning ("`%s' is not at beginning of declaration",
1080                              IDENTIFIER_POINTER ($2));
1081                   $$ = tree_cons (NULL_TREE, $2, $1);
1082                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1083         | declspecs_sc_nots_sa_noea scspec
1084                 { if (extra_warnings && TREE_STATIC ($1))
1085                     warning ("`%s' is not at beginning of declaration",
1086                              IDENTIFIER_POINTER ($2));
1087                   $$ = tree_cons (NULL_TREE, $2, $1);
1088                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1089         | declspecs_sc_nots_sa_ea scspec
1090                 { if (extra_warnings && TREE_STATIC ($1))
1091                     warning ("`%s' is not at beginning of declaration",
1092                              IDENTIFIER_POINTER ($2));
1093                   $$ = tree_cons (NULL_TREE, $2, $1);
1094                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1095         ;
1096
1097 declspecs_sc_nots_sa_ea:
1098           declspecs_sc_nots_sa_noea attributes
1099                 { $$ = tree_cons ($2, NULL_TREE, $1);
1100                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1101         ;
1102
1103 declspecs_sc_ts_nosa_noea:
1104           declspecs_sc_ts_nosa_noea TYPE_QUAL
1105                 { $$ = tree_cons (NULL_TREE, $2, $1);
1106                   TREE_STATIC ($$) = 1; }
1107         | declspecs_sc_ts_nosa_ea TYPE_QUAL
1108                 { $$ = tree_cons (NULL_TREE, $2, $1);
1109                   TREE_STATIC ($$) = 1; }
1110         | declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
1111                 { $$ = tree_cons (NULL_TREE, $2, $1);
1112                   TREE_STATIC ($$) = 1; }
1113         | declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
1114                 { $$ = tree_cons (NULL_TREE, $2, $1);
1115                   TREE_STATIC ($$) = 1; }
1116         | declspecs_sc_nots_nosa_noea typespec_nonattr
1117                 { $$ = tree_cons (NULL_TREE, $2, $1);
1118                   TREE_STATIC ($$) = 1; }
1119         | declspecs_sc_nots_nosa_ea typespec_nonattr
1120                 { $$ = tree_cons (NULL_TREE, $2, $1);
1121                   TREE_STATIC ($$) = 1; }
1122         | declspecs_nosc_ts_nosa_noea scspec
1123                 { if (extra_warnings && TREE_STATIC ($1))
1124                     warning ("`%s' is not at beginning of declaration",
1125                              IDENTIFIER_POINTER ($2));
1126                   $$ = tree_cons (NULL_TREE, $2, $1);
1127                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1128         | declspecs_nosc_ts_nosa_ea scspec
1129                 { if (extra_warnings && TREE_STATIC ($1))
1130                     warning ("`%s' is not at beginning of declaration",
1131                              IDENTIFIER_POINTER ($2));
1132                   $$ = tree_cons (NULL_TREE, $2, $1);
1133                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1134         | declspecs_sc_ts_nosa_noea scspec
1135                 { if (extra_warnings && TREE_STATIC ($1))
1136                     warning ("`%s' is not at beginning of declaration",
1137                              IDENTIFIER_POINTER ($2));
1138                   $$ = tree_cons (NULL_TREE, $2, $1);
1139                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1140         | declspecs_sc_ts_nosa_ea scspec
1141                 { if (extra_warnings && TREE_STATIC ($1))
1142                     warning ("`%s' is not at beginning of declaration",
1143                              IDENTIFIER_POINTER ($2));
1144                   $$ = tree_cons (NULL_TREE, $2, $1);
1145                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1146         ;
1147
1148 declspecs_sc_ts_nosa_ea:
1149           declspecs_sc_ts_nosa_noea attributes
1150                 { $$ = tree_cons ($2, NULL_TREE, $1);
1151                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1152         | declspecs_sc_ts_nosa_noea typespec_reserved_attr
1153                 { $$ = tree_cons (NULL_TREE, $2, $1);
1154                   TREE_STATIC ($$) = 1; }
1155         | declspecs_sc_ts_nosa_ea typespec_reserved_attr
1156                 { $$ = tree_cons (NULL_TREE, $2, $1);
1157                   TREE_STATIC ($$) = 1; }
1158         | declspecs_sc_nots_nosa_noea typespec_attr
1159                 { $$ = tree_cons (NULL_TREE, $2, $1);
1160                   TREE_STATIC ($$) = 1; }
1161         | declspecs_sc_nots_nosa_ea typespec_attr
1162                 { $$ = tree_cons (NULL_TREE, $2, $1);
1163                   TREE_STATIC ($$) = 1; }
1164         ;
1165
1166 declspecs_sc_ts_sa_noea:
1167           declspecs_sc_ts_sa_noea TYPE_QUAL
1168                 { $$ = tree_cons (NULL_TREE, $2, $1);
1169                   TREE_STATIC ($$) = 1; }
1170         | declspecs_sc_ts_sa_ea TYPE_QUAL
1171                 { $$ = tree_cons (NULL_TREE, $2, $1);
1172                   TREE_STATIC ($$) = 1; }
1173         | declspecs_sc_ts_sa_noea typespec_reserved_nonattr
1174                 { $$ = tree_cons (NULL_TREE, $2, $1);
1175                   TREE_STATIC ($$) = 1; }
1176         | declspecs_sc_ts_sa_ea typespec_reserved_nonattr
1177                 { $$ = tree_cons (NULL_TREE, $2, $1);
1178                   TREE_STATIC ($$) = 1; }
1179         | declspecs_sc_nots_sa_noea typespec_nonattr
1180                 { $$ = tree_cons (NULL_TREE, $2, $1);
1181                   TREE_STATIC ($$) = 1; }
1182         | declspecs_sc_nots_sa_ea typespec_nonattr
1183                 { $$ = tree_cons (NULL_TREE, $2, $1);
1184                   TREE_STATIC ($$) = 1; }
1185         | declspecs_nosc_ts_sa_noea scspec
1186                 { if (extra_warnings && TREE_STATIC ($1))
1187                     warning ("`%s' is not at beginning of declaration",
1188                              IDENTIFIER_POINTER ($2));
1189                   $$ = tree_cons (NULL_TREE, $2, $1);
1190                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1191         | declspecs_nosc_ts_sa_ea scspec
1192                 { if (extra_warnings && TREE_STATIC ($1))
1193                     warning ("`%s' is not at beginning of declaration",
1194                              IDENTIFIER_POINTER ($2));
1195                   $$ = tree_cons (NULL_TREE, $2, $1);
1196                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1197         | declspecs_sc_ts_sa_noea scspec
1198                 { if (extra_warnings && TREE_STATIC ($1))
1199                     warning ("`%s' is not at beginning of declaration",
1200                              IDENTIFIER_POINTER ($2));
1201                   $$ = tree_cons (NULL_TREE, $2, $1);
1202                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1203         | declspecs_sc_ts_sa_ea scspec
1204                 { if (extra_warnings && TREE_STATIC ($1))
1205                     warning ("`%s' is not at beginning of declaration",
1206                              IDENTIFIER_POINTER ($2));
1207                   $$ = tree_cons (NULL_TREE, $2, $1);
1208                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1209         ;
1210
1211 declspecs_sc_ts_sa_ea:
1212           declspecs_sc_ts_sa_noea attributes
1213                 { $$ = tree_cons ($2, NULL_TREE, $1);
1214                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1215         | declspecs_sc_ts_sa_noea typespec_reserved_attr
1216                 { $$ = tree_cons (NULL_TREE, $2, $1);
1217                   TREE_STATIC ($$) = 1; }
1218         | declspecs_sc_ts_sa_ea typespec_reserved_attr
1219                 { $$ = tree_cons (NULL_TREE, $2, $1);
1220                   TREE_STATIC ($$) = 1; }
1221         | declspecs_sc_nots_sa_noea typespec_attr
1222                 { $$ = tree_cons (NULL_TREE, $2, $1);
1223                   TREE_STATIC ($$) = 1; }
1224         | declspecs_sc_nots_sa_ea typespec_attr
1225                 { $$ = tree_cons (NULL_TREE, $2, $1);
1226                   TREE_STATIC ($$) = 1; }
1227         ;
1228
1229 /* Particular useful classes of declspecs.  */
1230 declspecs_ts:
1231           declspecs_nosc_ts_nosa_noea
1232         | declspecs_nosc_ts_nosa_ea
1233         | declspecs_nosc_ts_sa_noea
1234         | declspecs_nosc_ts_sa_ea
1235         | declspecs_sc_ts_nosa_noea
1236         | declspecs_sc_ts_nosa_ea
1237         | declspecs_sc_ts_sa_noea
1238         | declspecs_sc_ts_sa_ea
1239         ;
1240
1241 declspecs_nots:
1242           declspecs_nosc_nots_nosa_noea
1243         | declspecs_nosc_nots_nosa_ea
1244         | declspecs_nosc_nots_sa_noea
1245         | declspecs_nosc_nots_sa_ea
1246         | declspecs_sc_nots_nosa_noea
1247         | declspecs_sc_nots_nosa_ea
1248         | declspecs_sc_nots_sa_noea
1249         | declspecs_sc_nots_sa_ea
1250         ;
1251
1252 declspecs_ts_nosa:
1253           declspecs_nosc_ts_nosa_noea
1254         | declspecs_nosc_ts_nosa_ea
1255         | declspecs_sc_ts_nosa_noea
1256         | declspecs_sc_ts_nosa_ea
1257         ;
1258
1259 declspecs_nots_nosa:
1260           declspecs_nosc_nots_nosa_noea
1261         | declspecs_nosc_nots_nosa_ea
1262         | declspecs_sc_nots_nosa_noea
1263         | declspecs_sc_nots_nosa_ea
1264         ;
1265
1266 declspecs_nosc_ts:
1267           declspecs_nosc_ts_nosa_noea
1268         | declspecs_nosc_ts_nosa_ea
1269         | declspecs_nosc_ts_sa_noea
1270         | declspecs_nosc_ts_sa_ea
1271         ;
1272
1273 declspecs_nosc_nots:
1274           declspecs_nosc_nots_nosa_noea
1275         | declspecs_nosc_nots_nosa_ea
1276         | declspecs_nosc_nots_sa_noea
1277         | declspecs_nosc_nots_sa_ea
1278         ;
1279
1280 declspecs_nosc:
1281           declspecs_nosc_ts_nosa_noea
1282         | declspecs_nosc_ts_nosa_ea
1283         | declspecs_nosc_ts_sa_noea
1284         | declspecs_nosc_ts_sa_ea
1285         | declspecs_nosc_nots_nosa_noea
1286         | declspecs_nosc_nots_nosa_ea
1287         | declspecs_nosc_nots_sa_noea
1288         | declspecs_nosc_nots_sa_ea
1289         ;
1290
1291 declspecs:
1292           declspecs_nosc_nots_nosa_noea
1293         | declspecs_nosc_nots_nosa_ea
1294         | declspecs_nosc_nots_sa_noea
1295         | declspecs_nosc_nots_sa_ea
1296         | declspecs_nosc_ts_nosa_noea
1297         | declspecs_nosc_ts_nosa_ea
1298         | declspecs_nosc_ts_sa_noea
1299         | declspecs_nosc_ts_sa_ea
1300         | declspecs_sc_nots_nosa_noea
1301         | declspecs_sc_nots_nosa_ea
1302         | declspecs_sc_nots_sa_noea
1303         | declspecs_sc_nots_sa_ea
1304         | declspecs_sc_ts_nosa_noea
1305         | declspecs_sc_ts_nosa_ea
1306         | declspecs_sc_ts_sa_noea
1307         | declspecs_sc_ts_sa_ea
1308         ;
1309
1310 /* A (possibly empty) sequence of type qualifiers and attributes.  */
1311 maybe_type_quals_attrs:
1312           /* empty */
1313                 { $$ = NULL_TREE; }
1314         | declspecs_nosc_nots
1315                 { $$ = $1; }
1316         ;
1317
1318 /* A type specifier (but not a type qualifier).
1319    Once we have seen one of these in a declaration,
1320    if a typedef name appears then it is being redeclared.
1321
1322    The _reserved versions start with a reserved word and may appear anywhere
1323    in the declaration specifiers; the _nonreserved versions may only
1324    appear before any other type specifiers, and after that are (if names)
1325    being redeclared.
1326
1327    FIXME: should the _nonreserved version be restricted to names being
1328    redeclared only?  The other entries there relate only the GNU extensions
1329    and Objective C, and are historically parsed thus, and don't make sense
1330    after other type specifiers, but it might be cleaner to count them as
1331    _reserved.
1332
1333    _attr means: specifiers that either end with attributes,
1334    or are such that any following attributes would
1335    be parsed as part of the specifier.
1336
1337    _nonattr: specifiers.  */
1338
1339 typespec_nonattr:
1340           typespec_reserved_nonattr
1341         | typespec_nonreserved_nonattr
1342         ;
1343
1344 typespec_attr:
1345           typespec_reserved_attr
1346         ;
1347
1348 typespec_reserved_nonattr:
1349           TYPESPEC
1350                 { OBJC_NEED_RAW_IDENTIFIER (1); }
1351         | structsp_nonattr
1352         ;
1353
1354 typespec_reserved_attr:
1355           structsp_attr
1356         ;
1357
1358 typespec_nonreserved_nonattr:
1359           TYPENAME
1360                 { /* For a typedef name, record the meaning, not the name.
1361                      In case of `foo foo, bar;'.  */
1362                   $$ = lookup_name ($1); }
1363 @@ifobjc
1364         | CLASSNAME protocolrefs
1365                 { $$ = get_static_reference ($1, $2); }
1366         | OBJECTNAME protocolrefs
1367                 { $$ = get_object_reference ($2); }
1368
1369 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1370    - nisse@lysator.liu.se */
1371         | non_empty_protocolrefs
1372                 { $$ = get_object_reference ($1); }
1373 @@end_ifobjc
1374         | typeof '(' expr ')'
1375                 { skip_evaluation--;
1376                   if (TREE_CODE ($3) == COMPONENT_REF
1377                       && DECL_C_BIT_FIELD (TREE_OPERAND ($3, 1)))
1378                     error ("`typeof' applied to a bit-field");
1379                   $$ = TREE_TYPE ($3); }
1380         | typeof '(' typename ')'
1381                 { skip_evaluation--; $$ = groktypename ($3); }
1382         ;
1383
1384 /* typespec_nonreserved_attr does not exist.  */
1385
1386 initdecls:
1387         initdcl
1388         | initdecls ',' maybe_resetattrs initdcl
1389         ;
1390
1391 notype_initdecls:
1392         notype_initdcl
1393         | notype_initdecls ',' maybe_resetattrs notype_initdcl
1394         ;
1395
1396 maybeasm:
1397           /* empty */
1398                 { $$ = NULL_TREE; }
1399         | ASM_KEYWORD '(' STRING ')'
1400                 { $$ = $3; }
1401         ;
1402
1403 initdcl:
1404           declarator maybeasm maybe_attribute '='
1405                 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1406                                           chainon ($3, all_prefix_attributes));
1407                   start_init ($<ttype>$, $2, global_bindings_p ()); }
1408           init
1409 /* Note how the declaration of the variable is in effect while its init is parsed! */
1410                 { finish_init ();
1411                   finish_decl ($<ttype>5, $6, $2); }
1412         | declarator maybeasm maybe_attribute
1413                 { tree d = start_decl ($1, current_declspecs, 0,
1414                                        chainon ($3, all_prefix_attributes));
1415                   finish_decl (d, NULL_TREE, $2);
1416                 }
1417         ;
1418
1419 notype_initdcl:
1420           notype_declarator maybeasm maybe_attribute '='
1421                 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1422                                           chainon ($3, all_prefix_attributes));
1423                   start_init ($<ttype>$, $2, global_bindings_p ()); }
1424           init
1425 /* Note how the declaration of the variable is in effect while its init is parsed! */
1426                 { finish_init ();
1427                   finish_decl ($<ttype>5, $6, $2); }
1428         | notype_declarator maybeasm maybe_attribute
1429                 { tree d = start_decl ($1, current_declspecs, 0,
1430                                        chainon ($3, all_prefix_attributes));
1431                   finish_decl (d, NULL_TREE, $2); }
1432         ;
1433 /* the * rules are dummies to accept the Apollo extended syntax
1434    so that the header files compile. */
1435 maybe_attribute:
1436       /* empty */
1437                 { $$ = NULL_TREE; }
1438         | attributes
1439                 { $$ = $1; }
1440         ;
1441
1442 attributes:
1443       attribute
1444                 { $$ = $1; }
1445         | attributes attribute
1446                 { $$ = chainon ($1, $2); }
1447         ;
1448
1449 attribute:
1450       ATTRIBUTE '(' '(' attribute_list ')' ')'
1451                 { $$ = $4; }
1452         ;
1453
1454 attribute_list:
1455       attrib
1456                 { $$ = $1; }
1457         | attribute_list ',' attrib
1458                 { $$ = chainon ($1, $3); }
1459         ;
1460
1461 attrib:
1462     /* empty */
1463                 { $$ = NULL_TREE; }
1464         | any_word
1465                 { $$ = build_tree_list ($1, NULL_TREE); }
1466         | any_word '(' IDENTIFIER ')'
1467                 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1468         | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1469                 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1470         | any_word '(' exprlist ')'
1471                 { $$ = build_tree_list ($1, $3); }
1472         ;
1473
1474 /* This still leaves out most reserved keywords,
1475    shouldn't we include them?  */
1476
1477 any_word:
1478           identifier
1479         | scspec
1480         | TYPESPEC
1481         | TYPE_QUAL
1482         ;
1483
1484 scspec:
1485           STATIC
1486         | SCSPEC
1487         ;
1488 \f
1489 /* Initializers.  `init' is the entry point.  */
1490
1491 init:
1492         expr_no_commas
1493         | '{'
1494                 { really_start_incremental_init (NULL_TREE); }
1495           initlist_maybe_comma '}'
1496                 { $$ = pop_init_level (0); }
1497         | error
1498                 { $$ = error_mark_node; }
1499         ;
1500
1501 /* `initlist_maybe_comma' is the guts of an initializer in braces.  */
1502 initlist_maybe_comma:
1503           /* empty */
1504                 { if (pedantic)
1505                     pedwarn ("ISO C forbids empty initializer braces"); }
1506         | initlist1 maybecomma
1507         ;
1508
1509 initlist1:
1510           initelt
1511         | initlist1 ',' initelt
1512         ;
1513
1514 /* `initelt' is a single element of an initializer.
1515    It may use braces.  */
1516 initelt:
1517           designator_list '=' initval
1518                 { if (pedantic && ! flag_isoc99)
1519                     pedwarn ("ISO C89 forbids specifying subobject to initialize"); }
1520         | designator initval
1521                 { if (pedantic)
1522                     pedwarn ("obsolete use of designated initializer without `='"); }
1523         | identifier ':'
1524                 { set_init_label ($1);
1525                   if (pedantic)
1526                     pedwarn ("obsolete use of designated initializer with `:'"); }
1527           initval
1528                 {}
1529         | initval
1530         ;
1531
1532 initval:
1533           '{'
1534                 { push_init_level (0); }
1535           initlist_maybe_comma '}'
1536                 { process_init_element (pop_init_level (0)); }
1537         | expr_no_commas
1538                 { process_init_element ($1); }
1539         | error
1540         ;
1541
1542 designator_list:
1543           designator
1544         | designator_list designator
1545         ;
1546
1547 designator:
1548           '.' identifier
1549                 { set_init_label ($2); }
1550         | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1551                 { set_init_index ($2, $4);
1552                   if (pedantic)
1553                     pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1554         | '[' expr_no_commas ']'
1555                 { set_init_index ($2, NULL_TREE); }
1556         ;
1557 \f
1558 nested_function:
1559           declarator
1560                 { if (pedantic)
1561                     pedwarn ("ISO C forbids nested functions");
1562
1563                   push_function_context ();
1564                   if (! start_function (current_declspecs, $1,
1565                                         all_prefix_attributes))
1566                     {
1567                       pop_function_context ();
1568                       YYERROR1;
1569                     }
1570                   parsing_iso_function_signature = false; /* Don't warn about nested functions.  */
1571                 }
1572            old_style_parm_decls save_location
1573                 { tree decl = current_function_decl;
1574                   DECL_SOURCE_LOCATION (decl) = $4;
1575                   store_parm_decls (); }
1576 /* This used to use compstmt_or_error.
1577    That caused a bug with input `f(g) int g {}',
1578    where the use of YYERROR1 above caused an error
1579    which then was handled by compstmt_or_error.
1580    There followed a repeated execution of that same rule,
1581    which called YYERROR1 again, and so on.  */
1582           compstmt
1583                 { tree decl = current_function_decl;
1584                   finish_function ();
1585                   pop_function_context ();
1586                   add_decl_stmt (decl); }
1587         ;
1588
1589 notype_nested_function:
1590           notype_declarator
1591                 { if (pedantic)
1592                     pedwarn ("ISO C forbids nested functions");
1593
1594                   push_function_context ();
1595                   if (! start_function (current_declspecs, $1,
1596                                         all_prefix_attributes))
1597                     {
1598                       pop_function_context ();
1599                       YYERROR1;
1600                     }
1601                   parsing_iso_function_signature = false; /* Don't warn about nested functions.  */
1602                 }
1603           old_style_parm_decls save_location
1604                 { tree decl = current_function_decl;
1605                   DECL_SOURCE_LOCATION (decl) = $4;
1606                   store_parm_decls (); }
1607 /* This used to use compstmt_or_error.
1608    That caused a bug with input `f(g) int g {}',
1609    where the use of YYERROR1 above caused an error
1610    which then was handled by compstmt_or_error.
1611    There followed a repeated execution of that same rule,
1612    which called YYERROR1 again, and so on.  */
1613           compstmt
1614                 { tree decl = current_function_decl;
1615                   finish_function ();
1616                   pop_function_context ();
1617                   add_decl_stmt (decl); }
1618         ;
1619
1620 /* Any kind of declarator (thus, all declarators allowed
1621    after an explicit typespec).  */
1622
1623 declarator:
1624           after_type_declarator
1625         | notype_declarator
1626         ;
1627
1628 /* A declarator that is allowed only after an explicit typespec.  */
1629
1630 after_type_declarator:
1631           '(' maybe_attribute after_type_declarator ')'
1632                 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1633         | after_type_declarator '(' parmlist_or_identifiers  %prec '.'
1634                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1635 /*      | after_type_declarator '(' error ')'  %prec '.'
1636                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1637                   poplevel (0, 0, 0); }  */
1638         | after_type_declarator array_declarator  %prec '.'
1639                 { $$ = set_array_declarator_type ($2, $1, 0); }
1640         | '*' maybe_type_quals_attrs after_type_declarator  %prec UNARY
1641                 { $$ = make_pointer_declarator ($2, $3); }
1642         | TYPENAME
1643 @@ifobjc
1644         | OBJECTNAME
1645 @@end_ifobjc
1646         ;
1647
1648 /* Kinds of declarator that can appear in a parameter list
1649    in addition to notype_declarator.  This is like after_type_declarator
1650    but does not allow a typedef name in parentheses as an identifier
1651    (because it would conflict with a function with that typedef as arg).  */
1652 parm_declarator:
1653           parm_declarator_starttypename
1654         | parm_declarator_nostarttypename
1655         ;
1656
1657 parm_declarator_starttypename:
1658           parm_declarator_starttypename '(' parmlist_or_identifiers  %prec '.'
1659                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1660 /*      | parm_declarator_starttypename '(' error ')'  %prec '.'
1661                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1662                   poplevel (0, 0, 0); }  */
1663         | parm_declarator_starttypename array_declarator  %prec '.'
1664                 { $$ = set_array_declarator_type ($2, $1, 0); }
1665         | TYPENAME
1666 @@ifobjc
1667         | OBJECTNAME
1668 @@end_ifobjc
1669         ;
1670
1671 parm_declarator_nostarttypename:
1672           parm_declarator_nostarttypename '(' parmlist_or_identifiers  %prec '.'
1673                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1674 /*      | parm_declarator_nostarttypename '(' error ')'  %prec '.'
1675                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1676                   poplevel (0, 0, 0); }  */
1677         | parm_declarator_nostarttypename array_declarator  %prec '.'
1678                 { $$ = set_array_declarator_type ($2, $1, 0); }
1679         | '*' maybe_type_quals_attrs parm_declarator_starttypename  %prec UNARY
1680                 { $$ = make_pointer_declarator ($2, $3); }
1681         | '*' maybe_type_quals_attrs parm_declarator_nostarttypename  %prec UNARY
1682                 { $$ = make_pointer_declarator ($2, $3); }
1683         | '(' maybe_attribute parm_declarator_nostarttypename ')'
1684                 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1685         ;
1686
1687 /* A declarator allowed whether or not there has been
1688    an explicit typespec.  These cannot redeclare a typedef-name.  */
1689
1690 notype_declarator:
1691           notype_declarator '(' parmlist_or_identifiers  %prec '.'
1692                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1693 /*      | notype_declarator '(' error ')'  %prec '.'
1694                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1695                   poplevel (0, 0, 0); }  */
1696         | '(' maybe_attribute notype_declarator ')'
1697                 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1698         | '*' maybe_type_quals_attrs notype_declarator  %prec UNARY
1699                 { $$ = make_pointer_declarator ($2, $3); }
1700         | notype_declarator array_declarator  %prec '.'
1701                 { $$ = set_array_declarator_type ($2, $1, 0); }
1702         | IDENTIFIER
1703         ;
1704
1705 struct_head:
1706           STRUCT
1707                 { $$ = NULL_TREE; }
1708         | STRUCT attributes
1709                 { $$ = $2; }
1710         ;
1711
1712 union_head:
1713           UNION
1714                 { $$ = NULL_TREE; }
1715         | UNION attributes
1716                 { $$ = $2; }
1717         ;
1718
1719 enum_head:
1720           ENUM
1721                 { $$ = NULL_TREE; }
1722         | ENUM attributes
1723                 { $$ = $2; }
1724         ;
1725
1726 /* structsp_attr: struct/union/enum specifiers that either
1727    end with attributes, or are such that any following attributes would
1728    be parsed as part of the struct/union/enum specifier.
1729
1730    structsp_nonattr: other struct/union/enum specifiers.  */
1731
1732 structsp_attr:
1733           struct_head identifier '{'
1734                 { $$ = start_struct (RECORD_TYPE, $2);
1735                   /* Start scope of tag before parsing components.  */
1736                 }
1737           component_decl_list '}' maybe_attribute
1738                 { $$ = finish_struct ($<ttype>4, nreverse ($5),
1739                                       chainon ($1, $7)); }
1740         | struct_head '{' component_decl_list '}' maybe_attribute
1741                 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1742                                       nreverse ($3), chainon ($1, $5));
1743                 }
1744         | union_head identifier '{'
1745                 { $$ = start_struct (UNION_TYPE, $2); }
1746           component_decl_list '}' maybe_attribute
1747                 { $$ = finish_struct ($<ttype>4, nreverse ($5),
1748                                       chainon ($1, $7)); }
1749         | union_head '{' component_decl_list '}' maybe_attribute
1750                 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1751                                       nreverse ($3), chainon ($1, $5));
1752                 }
1753         | enum_head identifier '{'
1754                 { $$ = start_enum ($2); }
1755           enumlist maybecomma_warn '}' maybe_attribute
1756                 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1757                                     chainon ($1, $8)); }
1758         | enum_head '{'
1759                 { $$ = start_enum (NULL_TREE); }
1760           enumlist maybecomma_warn '}' maybe_attribute
1761                 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1762                                     chainon ($1, $7)); }
1763         ;
1764
1765 structsp_nonattr:
1766           struct_head identifier
1767                 { $$ = xref_tag (RECORD_TYPE, $2); }
1768         | union_head identifier
1769                 { $$ = xref_tag (UNION_TYPE, $2); }
1770         | enum_head identifier
1771                 { $$ = xref_tag (ENUMERAL_TYPE, $2);
1772                   /* In ISO C, enumerated types can be referred to
1773                      only if already defined.  */
1774                   if (pedantic && !COMPLETE_TYPE_P ($$))
1775                     pedwarn ("ISO C forbids forward references to `enum' types"); }
1776         ;
1777
1778 maybecomma:
1779           /* empty */
1780         | ','
1781         ;
1782
1783 maybecomma_warn:
1784           /* empty */
1785         | ','
1786                 { if (pedantic && ! flag_isoc99)
1787                     pedwarn ("comma at end of enumerator list"); }
1788         ;
1789
1790 /* We chain the components in reverse order.  They are put in forward
1791    order in structsp_attr.
1792
1793    Note that component_declarator returns single decls, so components
1794    and components_notype can use TREE_CHAIN directly, wheras components
1795    and components_notype return lists (of comma separated decls), so
1796    component_decl_list and component_decl_list2 must use chainon.
1797
1798    The theory behind all this is that there will be more semicolon
1799    separated fields than comma separated fields, and so we'll be
1800    minimizing the number of node traversals required by chainon.  */
1801
1802 component_decl_list:
1803           component_decl_list2
1804                 { $$ = $1; }
1805         | component_decl_list2 component_decl
1806                 { $$ = chainon ($2, $1);
1807                   pedwarn ("no semicolon at end of struct or union"); }
1808         ;
1809
1810 component_decl_list2:   /* empty */
1811                 { $$ = NULL_TREE; }
1812         | component_decl_list2 component_decl ';'
1813                 { $$ = chainon ($2, $1); }
1814         | component_decl_list2 ';'
1815                 { if (pedantic)
1816                     pedwarn ("extra semicolon in struct or union specified"); }
1817 @@ifobjc
1818         /* foo(sizeof(struct{ @defs(ClassName)})); */
1819         | DEFS '(' CLASSNAME ')'
1820                 { $$ = nreverse (get_class_ivars_from_name ($3)); }
1821 @@end_ifobjc
1822         ;
1823
1824 component_decl:
1825           declspecs_nosc_ts setspecs components
1826                 { $$ = $3;
1827                   POP_DECLSPEC_STACK; }
1828         | declspecs_nosc_ts setspecs
1829                 {
1830                   /* Support for unnamed structs or unions as members of
1831                      structs or unions (which is [a] useful and [b] supports
1832                      MS P-SDK).  */
1833                   if (pedantic)
1834                     pedwarn ("ISO C doesn't support unnamed structs/unions");
1835
1836                   $$ = grokfield(NULL, current_declspecs, NULL_TREE);
1837                   POP_DECLSPEC_STACK; }
1838         | declspecs_nosc_nots setspecs components_notype
1839                 { $$ = $3;
1840                   POP_DECLSPEC_STACK; }
1841         | declspecs_nosc_nots
1842                 { if (pedantic)
1843                     pedwarn ("ISO C forbids member declarations with no members");
1844                   shadow_tag_warned ($1, pedantic);
1845                   $$ = NULL_TREE; }
1846         | error
1847                 { $$ = NULL_TREE; }
1848         | extension component_decl
1849                 { $$ = $2;
1850                   RESTORE_EXT_FLAGS ($1); }
1851         ;
1852
1853 components:
1854           component_declarator
1855         | components ',' maybe_resetattrs component_declarator
1856                 { TREE_CHAIN ($4) = $1; $$ = $4; }
1857         ;
1858
1859 components_notype:
1860           component_notype_declarator
1861         | components_notype ',' maybe_resetattrs component_notype_declarator
1862                 { TREE_CHAIN ($4) = $1; $$ = $4; }
1863         ;
1864
1865 component_declarator:
1866           declarator maybe_attribute
1867                 { $$ = grokfield ($1, current_declspecs, NULL_TREE);
1868                   decl_attributes (&$$,
1869                                    chainon ($2, all_prefix_attributes), 0); }
1870         | declarator ':' expr_no_commas maybe_attribute
1871                 { $$ = grokfield ($1, current_declspecs, $3);
1872                   decl_attributes (&$$,
1873                                    chainon ($4, all_prefix_attributes), 0); }
1874         | ':' expr_no_commas maybe_attribute
1875                 { $$ = grokfield (NULL_TREE, current_declspecs, $2);
1876                   decl_attributes (&$$,
1877                                    chainon ($3, all_prefix_attributes), 0); }
1878         ;
1879
1880 component_notype_declarator:
1881           notype_declarator maybe_attribute
1882                 { $$ = grokfield ($1, current_declspecs, NULL_TREE);
1883                   decl_attributes (&$$,
1884                                    chainon ($2, all_prefix_attributes), 0); }
1885         | notype_declarator ':' expr_no_commas maybe_attribute
1886                 { $$ = grokfield ($1, current_declspecs, $3);
1887                   decl_attributes (&$$,
1888                                    chainon ($4, all_prefix_attributes), 0); }
1889         | ':' expr_no_commas maybe_attribute
1890                 { $$ = grokfield (NULL_TREE, current_declspecs, $2);
1891                   decl_attributes (&$$,
1892                                    chainon ($3, all_prefix_attributes), 0); }
1893         ;
1894
1895 /* We chain the enumerators in reverse order.
1896    They are put in forward order in structsp_attr.  */
1897
1898 enumlist:
1899           enumerator
1900         | enumlist ',' enumerator
1901                 { if ($1 == error_mark_node)
1902                     $$ = $1;
1903                   else
1904                     TREE_CHAIN ($3) = $1, $$ = $3; }
1905         | error
1906                 { $$ = error_mark_node; }
1907         ;
1908
1909
1910 enumerator:
1911           identifier
1912                 { $$ = build_enumerator ($1, NULL_TREE); }
1913         | identifier '=' expr_no_commas
1914                 { $$ = build_enumerator ($1, $3); }
1915         ;
1916
1917 typename:
1918           declspecs_nosc
1919                 { pending_xref_error ();
1920                   $<ttype>$ = $1; }
1921           absdcl
1922                 { $$ = build_tree_list ($<ttype>2, $3); }
1923         ;
1924
1925 absdcl:   /* an absolute declarator */
1926         /* empty */
1927                 { $$ = NULL_TREE; }
1928         | absdcl1
1929         ;
1930
1931 absdcl_maybe_attribute:   /* absdcl maybe_attribute, but not just attributes */
1932         /* empty */
1933                 { $$ = build_tree_list (build_tree_list (current_declspecs,
1934                                                          NULL_TREE),
1935                                         all_prefix_attributes); }
1936         | absdcl1
1937                 { $$ = build_tree_list (build_tree_list (current_declspecs,
1938                                                          $1),
1939                                         all_prefix_attributes); }
1940         | absdcl1_noea attributes
1941                 { $$ = build_tree_list (build_tree_list (current_declspecs,
1942                                                          $1),
1943                                         chainon ($2, all_prefix_attributes)); }
1944         ;
1945
1946 absdcl1:  /* a nonempty absolute declarator */
1947           absdcl1_ea
1948         | absdcl1_noea
1949         ;
1950
1951 absdcl1_noea:
1952           direct_absdcl1
1953         | '*' maybe_type_quals_attrs absdcl1_noea
1954                 { $$ = make_pointer_declarator ($2, $3); }
1955         ;
1956
1957 absdcl1_ea:
1958           '*' maybe_type_quals_attrs
1959                 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1960         | '*' maybe_type_quals_attrs absdcl1_ea
1961                 { $$ = make_pointer_declarator ($2, $3); }
1962         ;
1963
1964 direct_absdcl1:
1965           '(' maybe_attribute absdcl1 ')'
1966                 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1967         | direct_absdcl1 '(' parmlist
1968                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1969         | direct_absdcl1 array_declarator
1970                 { $$ = set_array_declarator_type ($2, $1, 1); }
1971         | '(' parmlist
1972                 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1973         | array_declarator
1974                 { $$ = set_array_declarator_type ($1, NULL_TREE, 1); }
1975         ;
1976
1977 /* The [...] part of a declarator for an array type.  */
1978
1979 array_declarator:
1980         '[' maybe_type_quals_attrs expr_no_commas ']'
1981                 { $$ = build_array_declarator ($3, $2, 0, 0); }
1982         | '[' maybe_type_quals_attrs ']'
1983                 { $$ = build_array_declarator (NULL_TREE, $2, 0, 0); }
1984         | '[' maybe_type_quals_attrs '*' ']'
1985                 { $$ = build_array_declarator (NULL_TREE, $2, 0, 1); }
1986         | '[' STATIC maybe_type_quals_attrs expr_no_commas ']'
1987                 { $$ = build_array_declarator ($4, $3, 1, 0); }
1988         /* declspecs_nosc_nots is a synonym for type_quals_attrs.  */
1989         | '[' declspecs_nosc_nots STATIC expr_no_commas ']'
1990                 { $$ = build_array_declarator ($4, $2, 1, 0); }
1991         ;
1992
1993 /* A nonempty series of declarations and statements (possibly followed by
1994    some labels) that can form the body of a compound statement.
1995    NOTE: we don't allow labels on declarations; this might seem like a
1996    natural extension, but there would be a conflict between attributes
1997    on the label and prefix attributes on the declaration.  */
1998
1999 stmts_and_decls:
2000           lineno_stmt_decl_or_labels_ending_stmt
2001         | lineno_stmt_decl_or_labels_ending_decl
2002         | lineno_stmt_decl_or_labels_ending_label
2003                 {
2004                   pedwarn ("deprecated use of label at end of compound statement");
2005                 }
2006         | lineno_stmt_decl_or_labels_ending_error
2007         ;
2008
2009 lineno_stmt_decl_or_labels_ending_stmt:
2010           lineno_stmt
2011         | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
2012         | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
2013         | lineno_stmt_decl_or_labels_ending_label lineno_stmt
2014         | lineno_stmt_decl_or_labels_ending_error lineno_stmt
2015         ;
2016
2017 lineno_stmt_decl_or_labels_ending_decl:
2018           lineno_decl
2019         | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
2020                 {
2021                   if ((pedantic && !flag_isoc99)
2022                       || warn_declaration_after_statement)
2023                     pedwarn_c90 ("ISO C90 forbids mixed declarations and code");
2024                 }
2025         | lineno_stmt_decl_or_labels_ending_decl lineno_decl
2026         | lineno_stmt_decl_or_labels_ending_error lineno_decl
2027         ;
2028
2029 lineno_stmt_decl_or_labels_ending_label:
2030           lineno_label
2031         | lineno_stmt_decl_or_labels_ending_stmt lineno_label
2032         | lineno_stmt_decl_or_labels_ending_decl lineno_label
2033         | lineno_stmt_decl_or_labels_ending_label lineno_label
2034         | lineno_stmt_decl_or_labels_ending_error lineno_label
2035         ;
2036
2037 lineno_stmt_decl_or_labels_ending_error:
2038         errstmt
2039         | lineno_stmt_decl_or_labels errstmt
2040         ;
2041
2042 lineno_stmt_decl_or_labels:
2043           lineno_stmt_decl_or_labels_ending_stmt
2044         | lineno_stmt_decl_or_labels_ending_decl
2045         | lineno_stmt_decl_or_labels_ending_label
2046         | lineno_stmt_decl_or_labels_ending_error
2047         ;
2048
2049 errstmt:  error ';'
2050         ;
2051
2052 pushlevel:  /* empty */
2053                 { pushlevel (0);
2054                   clear_last_expr ();
2055                   add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2056                 }
2057         ;
2058
2059 poplevel:  /* empty */
2060                 {
2061 @@ifobjc
2062                   if (c_dialect_objc ())
2063                     objc_clear_super_receiver ();
2064 @@end_ifobjc
2065                   $$ = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
2066                 }
2067         ;
2068
2069 /* Start and end blocks created for the new scopes of C99.  */
2070 c99_block_start: /* empty */
2071                 { if (flag_isoc99)
2072                     {
2073                       $$ = c_begin_compound_stmt ();
2074                       pushlevel (0);
2075                       clear_last_expr ();
2076                       add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2077                     }
2078                   else
2079                     $$ = NULL_TREE;
2080                 }
2081         ;
2082
2083 /* Productions using c99_block_start and c99_block_end will need to do what's
2084    in compstmt: RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); $$ = $2; where
2085    $1 is the value of c99_block_start and $2 of c99_block_end.  */
2086 c99_block_end: /* empty */
2087                 { if (flag_isoc99)
2088                     {
2089                       tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
2090                       $$ = poplevel (KEEP_MAYBE, 0, 0);
2091                       SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
2092                         = SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
2093                         = $$;
2094                     }
2095                   else
2096                     $$ = NULL_TREE; }
2097         ;
2098
2099 /* Read zero or more forward-declarations for labels
2100    that nested functions can jump to.  */
2101 maybe_label_decls:
2102           /* empty */
2103         | label_decls
2104                 { if (pedantic)
2105                     pedwarn ("ISO C forbids label declarations"); }
2106         ;
2107
2108 label_decls:
2109           label_decl
2110         | label_decls label_decl
2111         ;
2112
2113 label_decl:
2114           LABEL identifiers_or_typenames ';'
2115                 { tree link;
2116                   for (link = $2; link; link = TREE_CHAIN (link))
2117                     {
2118                       tree label = declare_label (TREE_VALUE (link));
2119                       C_DECLARED_LABEL_FLAG (label) = 1;
2120                       add_decl_stmt (label);
2121                     }
2122                 }
2123         ;
2124
2125 /* This is the body of a function definition.
2126    It causes syntax errors to ignore to the next openbrace.  */
2127 compstmt_or_error:
2128           compstmt
2129                 {}
2130         | error compstmt
2131         ;
2132
2133 compstmt_start: '{' { compstmt_count++;
2134                       $$ = c_begin_compound_stmt (); }
2135         ;
2136
2137 compstmt_nostart: '}'
2138                 { $$ = convert (void_type_node, integer_zero_node); }
2139         | pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
2140                 { $$ = poplevel (KEEP_MAYBE, 0, 0);
2141                   SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
2142                     = SCOPE_STMT_BLOCK (TREE_VALUE ($5))
2143                     = $$; }
2144         ;
2145
2146 compstmt_contents_nonempty:
2147           stmts_and_decls
2148         | error
2149         ;
2150
2151 compstmt_primary_start:
2152         '(' '{'
2153                 { if (current_function_decl == 0)
2154                     {
2155                       error ("braced-group within expression allowed only inside a function");
2156                       YYERROR;
2157                     }
2158                   /* We must force a BLOCK for this level
2159                      so that, if it is not expanded later,
2160                      there is a way to turn off the entire subtree of blocks
2161                      that are contained in it.  */
2162                   keep_next_level ();
2163                   compstmt_count++;
2164                   $$ = add_stmt (build_stmt (COMPOUND_STMT, last_tree));
2165                 }
2166         ;
2167
2168 compstmt: compstmt_start compstmt_nostart
2169                 { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2170                   last_expr_type = NULL_TREE;
2171                   $$ = $1; }
2172         ;
2173
2174 /* Value is number of statements counted as of the closeparen.  */
2175 simple_if:
2176           if_prefix c99_block_lineno_labeled_stmt
2177                 { c_finish_then (); }
2178 /* Make sure c_expand_end_cond is run once
2179    for each call to c_expand_start_cond.
2180    Otherwise a crash is likely.  */
2181         | if_prefix error
2182         ;
2183
2184 if_prefix:
2185           /* We must build the IF_STMT node before parsing its
2186              condition so that STMT_LINENO refers to the line
2187              containing the "if", and not the line containing
2188              the close-parenthesis.
2189
2190              c_begin_if_stmt returns the IF_STMT node, which
2191              we later pass to c_expand_start_cond to fill
2192              in the condition and other tidbits.  */
2193           IF
2194                 { $<ttype>$ = c_begin_if_stmt (); }
2195             '(' expr ')'
2196                 { c_expand_start_cond (c_common_truthvalue_conversion ($4),
2197                                        compstmt_count,$<ttype>2);
2198                   $<itype>$ = stmt_count;
2199                   if_stmt_locus = $<location>-1; }
2200         ;
2201
2202 /* This is a subroutine of stmt.
2203    It is used twice, once for valid DO statements
2204    and once for catching errors in parsing the end test.  */
2205 do_stmt_start:
2206           DO
2207                 { stmt_count++;
2208                   compstmt_count++;
2209                   c_in_iteration_stmt++;
2210                   $<ttype>$
2211                     = add_stmt (build_stmt (DO_STMT, NULL_TREE,
2212                                             NULL_TREE));
2213                   /* In the event that a parse error prevents
2214                      parsing the complete do-statement, set the
2215                      condition now.  Otherwise, we can get crashes at
2216                      RTL-generation time.  */
2217                   DO_COND ($<ttype>$) = error_mark_node; }
2218           c99_block_lineno_labeled_stmt WHILE
2219                 { $$ = $<ttype>2;
2220                   RECHAIN_STMTS ($$, DO_BODY ($$));
2221                   c_in_iteration_stmt--; }
2222         ;
2223
2224 /* The forced readahead in here is because we might be at the end of a
2225    line, and the line and file won't be bumped until yylex absorbs the
2226    first token on the next line.  */
2227
2228 save_location:
2229                 { if (yychar == YYEMPTY)
2230                     yychar = YYLEX;
2231                   $$ = input_location; }
2232         ;
2233
2234 lineno_labeled_stmt:
2235           lineno_stmt
2236         | lineno_label lineno_labeled_stmt
2237         ;
2238
2239 /* Like lineno_labeled_stmt, but a block in C99.  */
2240 c99_block_lineno_labeled_stmt:
2241           c99_block_start lineno_labeled_stmt c99_block_end
2242                 { if (flag_isoc99)
2243                     RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); }
2244         ;
2245
2246 lineno_stmt:
2247           save_location stmt
2248                 { if ($2)
2249                     {
2250                       STMT_LINENO ($2) = $1.line;
2251                       /* ??? We currently have no way of recording
2252                          the filename for a statement.  This probably
2253                          matters little in practice at the moment,
2254                          but I suspect that problems will occur when
2255                          doing inlining at the tree level.  */
2256                     }
2257                 }
2258         ;
2259
2260 lineno_label:
2261           save_location label
2262                 { if ($2)
2263                     {
2264                       STMT_LINENO ($2) = $1.line;
2265                     }
2266                 }
2267         ;
2268
2269 select_or_iter_stmt:
2270           simple_if ELSE
2271                 { c_expand_start_else ();
2272                   $<itype>1 = stmt_count; }
2273           c99_block_lineno_labeled_stmt
2274                 { c_finish_else ();
2275                   c_expand_end_cond ();
2276                   if (extra_warnings && stmt_count == $<itype>1)
2277                     warning ("empty body in an else-statement"); }
2278         | simple_if %prec IF
2279                 { c_expand_end_cond ();
2280                   /* This warning is here instead of in simple_if, because we
2281                      do not want a warning if an empty if is followed by an
2282                      else statement.  Increment stmt_count so we don't
2283                      give a second error if this is a nested `if'.  */
2284                   if (extra_warnings && stmt_count++ == $<itype>1)
2285                     warning ("%Hempty body in an if-statement",
2286                              &if_stmt_locus); }
2287 /* Make sure c_expand_end_cond is run once
2288    for each call to c_expand_start_cond.
2289    Otherwise a crash is likely.  */
2290         | simple_if ELSE error
2291                 { c_expand_end_cond (); }
2292        /* We must build the WHILE_STMT node before parsing its
2293           condition so that STMT_LINENO refers to the line
2294           containing the "while", and not the line containing
2295           the close-parenthesis.
2296
2297           c_begin_while_stmt returns the WHILE_STMT node, which
2298           we later pass to c_finish_while_stmt_cond to fill
2299           in the condition and other tidbits.  */
2300         | WHILE
2301                 { stmt_count++;
2302                   $<ttype>$ = c_begin_while_stmt (); }
2303           '(' expr ')'
2304                 { c_in_iteration_stmt++;
2305                   $4 = c_common_truthvalue_conversion ($4);
2306                   c_finish_while_stmt_cond
2307                     (c_common_truthvalue_conversion ($4), $<ttype>2);
2308                   $<ttype>$ = add_stmt ($<ttype>2); }
2309           c99_block_lineno_labeled_stmt
2310                 { c_in_iteration_stmt--;
2311                   RECHAIN_STMTS ($<ttype>6, WHILE_BODY ($<ttype>6)); }
2312         | do_stmt_start
2313           '(' expr ')' ';'
2314                 { DO_COND ($1) = c_common_truthvalue_conversion ($3); }
2315         | do_stmt_start error
2316                 { }
2317         | FOR
2318                 { $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
2319                                           NULL_TREE, NULL_TREE);
2320                   add_stmt ($<ttype>$); }
2321           '(' for_init_stmt
2322                 { stmt_count++;
2323                   RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
2324           xexpr ';'
2325                 { if ($6)
2326                     FOR_COND ($<ttype>2)
2327                       = c_common_truthvalue_conversion ($6); }
2328           xexpr ')'
2329                 { c_in_iteration_stmt++;
2330                   FOR_EXPR ($<ttype>2) = $9; }
2331           c99_block_lineno_labeled_stmt
2332                 { RECHAIN_STMTS ($<ttype>2, FOR_BODY ($<ttype>2));
2333                   c_in_iteration_stmt--;}
2334         | SWITCH '(' expr ')'
2335                 { stmt_count++;
2336                   $<ttype>$ = c_start_case ($3);
2337                   c_in_case_stmt++; }
2338           c99_block_lineno_labeled_stmt
2339                 { c_finish_case ();
2340                   c_in_case_stmt--; }
2341         ;
2342
2343 for_init_stmt:
2344           xexpr ';'
2345                 { add_stmt (build_stmt (EXPR_STMT, $1)); }
2346         | decl
2347                 { check_for_loop_decls (); }
2348         ;
2349
2350 /* Parse a single real statement, not including any labels.  */
2351 stmt:
2352           compstmt
2353                 { stmt_count++; $$ = $1; }
2354         | expr ';'
2355                 { stmt_count++;
2356                   $$ = c_expand_expr_stmt ($1); }
2357         | c99_block_start select_or_iter_stmt c99_block_end
2358                 { if (flag_isoc99)
2359                     RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2360                   $$ = NULL_TREE; }
2361         | BREAK ';'
2362                 { stmt_count++;
2363                 if (!(c_in_iteration_stmt || c_in_case_stmt))
2364                   {
2365                     error ("break statement not within loop or switch");
2366                     $$ = NULL_TREE;
2367                   }
2368                 else
2369                   $$ = add_stmt (build_break_stmt ()); }
2370         | CONTINUE ';'
2371                 { stmt_count++;
2372                 if (!c_in_iteration_stmt)
2373                   {
2374                     error ("continue statement not within a loop");
2375                     $$ = NULL_TREE;
2376                   }
2377                 else
2378                   $$ = add_stmt (build_continue_stmt ()); }
2379         | RETURN ';'
2380                 { stmt_count++;
2381                   $$ = c_expand_return (NULL_TREE); }
2382         | RETURN expr ';'
2383                 { stmt_count++;
2384                   $$ = c_expand_return ($2); }
2385         | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2386                 { stmt_count++;
2387                   $$ = simple_asm_stmt ($4); }
2388         /* This is the case with just output operands.  */
2389         | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2390                 { stmt_count++;
2391                   $$ = build_asm_stmt ($2, $4, $6, NULL_TREE, NULL_TREE); }
2392         /* This is the case with input operands as well.  */
2393         | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2394           asm_operands ')' ';'
2395                 { stmt_count++;
2396                   $$ = build_asm_stmt ($2, $4, $6, $8, NULL_TREE); }
2397         /* This is the case with clobbered registers as well.  */
2398         | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2399           asm_operands ':' asm_clobbers ')' ';'
2400                 { stmt_count++;
2401                   $$ = build_asm_stmt ($2, $4, $6, $8, $10); }
2402         | GOTO identifier ';'
2403                 { tree decl;
2404                   stmt_count++;
2405                   decl = lookup_label ($2);
2406                   if (decl != 0)
2407                     {
2408                       TREE_USED (decl) = 1;
2409                       $$ = add_stmt (build_stmt (GOTO_STMT, decl));
2410                     }
2411                   else
2412                     $$ = NULL_TREE;
2413                 }
2414         | GOTO '*' expr ';'
2415                 { if (pedantic)
2416                     pedwarn ("ISO C forbids `goto *expr;'");
2417                   stmt_count++;
2418                   $3 = convert (ptr_type_node, $3);
2419                   $$ = add_stmt (build_stmt (GOTO_STMT, $3)); }
2420         | ';'
2421                 { $$ = NULL_TREE; }
2422 @@ifobjc
2423         | AT_THROW expr ';'
2424                 { stmt_count++;
2425                   $$ = objc_build_throw_stmt ($2);
2426                 }
2427         | AT_THROW ';'
2428                 { stmt_count++;
2429                   $$ = objc_build_throw_stmt (NULL_TREE);
2430                 }
2431         | objc_try_catch_stmt
2432                 { objc_build_finally_prologue (); }
2433           objc_finally_block
2434                 { $$ = objc_build_try_catch_finally_stmt ($1, $3); }
2435         | AT_SYNCHRONIZED '(' expr ')'
2436                 { objc_build_synchronized_prologue ($3); }
2437           compstmt
2438                 { $$ = objc_build_synchronized_epilogue (); }
2439         ;
2440
2441 objc_try_catch_stmt:
2442           objc_try_stmt
2443                 { objc_build_try_epilogue (1); }
2444           objc_catch_list
2445                 { objc_build_catch_epilogue (); $$ = 1; }
2446         | objc_try_stmt
2447                 { objc_build_try_epilogue (0); $$ = 0; }
2448         ;
2449
2450
2451 objc_try_stmt:
2452           AT_TRY
2453                 { objc_build_try_prologue (); }
2454           compstmt
2455         ;
2456
2457 objc_catch_list:
2458           objc_catch_list objc_catch_block
2459         | objc_catch_block
2460         ;
2461
2462 objc_catch_block:
2463           AT_CATCH '(' parm ')'
2464                 { objc_build_catch_stmt ($3); }
2465           compstmt
2466                 { stmt_count++; }
2467         ;
2468
2469 objc_finally_block:
2470           AT_FINALLY compstmt
2471             { $$ = 1; }
2472         | /* NULL */
2473             { $$ = 0; }
2474 @@end_ifobjc
2475         ;
2476
2477 /* Any kind of label, including jump labels and case labels.
2478    ANSI C accepts labels only before statements, but we allow them
2479    also at the end of a compound statement.  */
2480
2481 label:    CASE expr_no_commas ':'
2482                 { stmt_count++;
2483                   $$ = do_case ($2, NULL_TREE); }
2484         | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2485                 { stmt_count++;
2486                   $$ = do_case ($2, $4); }
2487         | DEFAULT ':'
2488                 { stmt_count++;
2489                   $$ = do_case (NULL_TREE, NULL_TREE); }
2490         | identifier save_location ':' maybe_attribute
2491                 { tree label = define_label ($2, $1);
2492                   stmt_count++;
2493                   if (label)
2494                     {
2495                       decl_attributes (&label, $4, 0);
2496                       $$ = add_stmt (build_stmt (LABEL_STMT, label));
2497                     }
2498                   else
2499                     $$ = NULL_TREE;
2500                 }
2501         ;
2502
2503 /* Either a type-qualifier or nothing.  First thing in an `asm' statement.  */
2504
2505 maybe_type_qual:
2506         /* empty */
2507                 { emit_line_note (input_location);
2508                   $$ = NULL_TREE; }
2509         | TYPE_QUAL
2510                 { emit_line_note (input_location); }
2511         ;
2512
2513 xexpr:
2514         /* empty */
2515                 { $$ = NULL_TREE; }
2516         | expr
2517         ;
2518
2519 /* These are the operands other than the first string and colon
2520    in  asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x))  */
2521 asm_operands: /* empty */
2522                 { $$ = NULL_TREE; }
2523         | nonnull_asm_operands
2524         ;
2525
2526 nonnull_asm_operands:
2527           asm_operand
2528         | nonnull_asm_operands ',' asm_operand
2529                 { $$ = chainon ($1, $3); }
2530         ;
2531
2532 asm_operand:
2533           STRING '(' expr ')'
2534                 { $$ = build_tree_list (build_tree_list (NULL_TREE, $1), $3); }
2535         | '[' identifier ']' STRING '(' expr ')'
2536                 { $2 = build_string (IDENTIFIER_LENGTH ($2),
2537                                      IDENTIFIER_POINTER ($2));
2538                   $$ = build_tree_list (build_tree_list ($2, $4), $6); }
2539         ;
2540
2541 asm_clobbers:
2542           STRING
2543                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
2544         | asm_clobbers ',' STRING
2545                 { $$ = tree_cons (NULL_TREE, $3, $1); }
2546         ;
2547 \f
2548 /* This is what appears inside the parens in a function declarator.
2549    Its value is a list of ..._TYPE nodes.  Attributes must appear here
2550    to avoid a conflict with their appearance after an open parenthesis
2551    in an abstract declarator, as in
2552    "void bar (int (__attribute__((__mode__(SI))) int foo));".  */
2553 parmlist:
2554           maybe_attribute
2555                 { pushlevel (0);
2556                   declare_parm_level (); }
2557           parmlist_1
2558                 { $$ = $3;
2559                   poplevel (0, 0, 0); }
2560         ;
2561
2562 parmlist_1:
2563           parmlist_2 ')'
2564         | parms ';'
2565                 { mark_forward_parm_decls (); }
2566           maybe_attribute
2567                 { /* Dummy action so attributes are in known place
2568                      on parser stack.  */ }
2569           parmlist_1
2570                 { $$ = $6; }
2571         | error ')'
2572                 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2573         ;
2574
2575 /* This is what appears inside the parens in a function declarator.
2576    Is value is represented in the format that grokdeclarator expects.  */
2577 parmlist_2:  /* empty */
2578                 { $$ = get_parm_info (0); }
2579         | ELLIPSIS
2580                 { $$ = get_parm_info (0);
2581                   /* Gcc used to allow this as an extension.  However, it does
2582                      not work for all targets, and thus has been disabled.
2583                      Also, since func (...) and func () are indistinguishable,
2584                      it caused problems with the code in expand_builtin which
2585                      tries to verify that BUILT_IN_NEXT_ARG is being used
2586                      correctly.  */
2587                   error ("ISO C requires a named argument before `...'");
2588                   parsing_iso_function_signature = true;
2589                 }
2590         | parms
2591                 { $$ = get_parm_info (1);
2592                   parsing_iso_function_signature = true;
2593                 }
2594         | parms ',' ELLIPSIS
2595                 { $$ = get_parm_info (0);
2596                   parsing_iso_function_signature = true;
2597                 }
2598         ;
2599
2600 parms:
2601         firstparm
2602                 { push_parm_decl ($1); }
2603         | parms ',' parm
2604                 { push_parm_decl ($3); }
2605         ;
2606
2607 /* A single parameter declaration or parameter type name,
2608    as found in a parmlist.  */
2609 parm:
2610           declspecs_ts setspecs parm_declarator maybe_attribute
2611                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2612                                                          $3),
2613                                         chainon ($4, all_prefix_attributes));
2614                   POP_DECLSPEC_STACK; }
2615         | declspecs_ts setspecs notype_declarator maybe_attribute
2616                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2617                                                          $3),
2618                                         chainon ($4, all_prefix_attributes));
2619                   POP_DECLSPEC_STACK; }
2620         | declspecs_ts setspecs absdcl_maybe_attribute
2621                 { $$ = $3;
2622                   POP_DECLSPEC_STACK; }
2623         | declspecs_nots setspecs notype_declarator maybe_attribute
2624                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2625                                                          $3),
2626                                         chainon ($4, all_prefix_attributes));
2627                   POP_DECLSPEC_STACK; }
2628
2629         | declspecs_nots setspecs absdcl_maybe_attribute
2630                 { $$ = $3;
2631                   POP_DECLSPEC_STACK; }
2632         ;
2633
2634 /* The first parm, which must suck attributes from off the top of the parser
2635    stack.  */
2636 firstparm:
2637           declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2638                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2639                                                          $3),
2640                                         chainon ($4, all_prefix_attributes));
2641                   POP_DECLSPEC_STACK; }
2642         | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2643                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2644                                                          $3),
2645                                         chainon ($4, all_prefix_attributes));
2646                   POP_DECLSPEC_STACK; }
2647         | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2648                 { $$ = $3;
2649                   POP_DECLSPEC_STACK; }
2650         | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2651                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2652                                                          $3),
2653                                         chainon ($4, all_prefix_attributes));
2654                   POP_DECLSPEC_STACK; }
2655
2656         | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2657                 { $$ = $3;
2658                   POP_DECLSPEC_STACK; }
2659         ;
2660
2661 setspecs_fp:
2662           setspecs
2663                 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2);
2664                   all_prefix_attributes = prefix_attributes; }
2665         ;
2666
2667 /* This is used in a function definition
2668    where either a parmlist or an identifier list is ok.
2669    Its value is a list of ..._TYPE nodes or a list of identifiers.  */
2670 parmlist_or_identifiers:
2671           maybe_attribute
2672                 { pushlevel (0);
2673                   declare_parm_level (); }
2674           parmlist_or_identifiers_1
2675                 { $$ = $3;
2676                   poplevel (0, 0, 0); }
2677         ;
2678
2679 parmlist_or_identifiers_1:
2680           parmlist_1
2681         | identifiers ')'
2682                 { tree t;
2683                   for (t = $1; t; t = TREE_CHAIN (t))
2684                     if (TREE_VALUE (t) == NULL_TREE)
2685                       error ("`...' in old-style identifier list");
2686                   $$ = tree_cons (NULL_TREE, NULL_TREE, $1);
2687
2688                   /* Make sure we have a parmlist after attributes.  */
2689                   if ($<ttype>-1 != 0
2690                       && (TREE_CODE ($$) != TREE_LIST
2691                           || TREE_PURPOSE ($$) == 0
2692                           || TREE_CODE (TREE_PURPOSE ($$)) != PARM_DECL))
2693                     YYERROR1;
2694                 }
2695         ;
2696
2697 /* A nonempty list of identifiers.  */
2698 identifiers:
2699         IDENTIFIER
2700                 { $$ = build_tree_list (NULL_TREE, $1); }
2701         | identifiers ',' IDENTIFIER
2702                 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2703         ;
2704
2705 /* A nonempty list of identifiers, including typenames.  */
2706 identifiers_or_typenames:
2707         identifier
2708                 { $$ = build_tree_list (NULL_TREE, $1); }
2709         | identifiers_or_typenames ',' identifier
2710                 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2711         ;
2712
2713 extension:
2714         EXTENSION
2715                 { $$ = SAVE_EXT_FLAGS();
2716                   pedantic = 0;
2717                   warn_pointer_arith = 0;
2718                   warn_traditional = 0;
2719                   flag_iso = 0; }
2720         ;
2721 \f
2722 @@ifobjc
2723 /* Objective-C productions.  */
2724
2725 objcdef:
2726           classdef
2727         | classdecl
2728         | aliasdecl
2729         | protocoldef
2730         | methoddef
2731         | END
2732                 {
2733                   if (objc_implementation_context)
2734                     {
2735                       finish_class (objc_implementation_context);
2736                       objc_ivar_chain = NULL_TREE;
2737                       objc_implementation_context = NULL_TREE;
2738                     }
2739                   else
2740                     warning ("`@end' must appear in an implementation context");
2741                 }
2742         ;
2743
2744 /* A nonempty list of identifiers.  */
2745 identifier_list:
2746         identifier
2747                 { $$ = build_tree_list (NULL_TREE, $1); }
2748         | identifier_list ',' identifier
2749                 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2750         ;
2751
2752 classdecl:
2753           CLASS identifier_list ';'
2754                 {
2755                   objc_declare_class ($2);
2756                 }
2757         ;
2758
2759 aliasdecl:
2760           ALIAS identifier identifier ';'
2761                 {
2762                   objc_declare_alias ($2, $3);
2763                 }
2764         ;
2765
2766 superclass:
2767           ':' identifier { $$ = $2; }
2768         | /* NULL */ %prec HYPERUNARY    { $$ = NULL_TREE; }
2769         ;
2770
2771 class_ivars:
2772           '{' ivar_decl_list '}'
2773         | /* NULL */
2774         ;
2775
2776 classdef:
2777           INTERFACE identifier superclass protocolrefs
2778                 {
2779                   objc_interface_context = objc_ivar_context
2780                     = start_class (CLASS_INTERFACE_TYPE, $2, $3, $4);
2781                   objc_public_flag = 0;
2782                 }
2783           class_ivars
2784                 {
2785                   continue_class (objc_interface_context);
2786                 }
2787           methodprotolist END
2788                 {
2789                   finish_class (objc_interface_context);
2790                   objc_interface_context = NULL_TREE;
2791                 }
2792
2793         | IMPLEMENTATION identifier superclass
2794                 {
2795                   objc_implementation_context = objc_ivar_context
2796                     = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $3, NULL_TREE);
2797                   objc_public_flag = 0;
2798                 }
2799           class_ivars
2800                 {
2801                   objc_ivar_chain
2802                     = continue_class (objc_implementation_context);
2803                 }
2804
2805         | INTERFACE identifier '(' identifier ')' protocolrefs
2806                 {
2807                   objc_interface_context
2808                     = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2809                   continue_class (objc_interface_context);
2810                 }
2811           methodprotolist END
2812                 {
2813                   finish_class (objc_interface_context);
2814                   objc_interface_context = NULL_TREE;
2815                 }
2816
2817         | IMPLEMENTATION identifier '(' identifier ')'
2818                 {
2819                   objc_implementation_context
2820                     = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2821                   objc_ivar_chain
2822                     = continue_class (objc_implementation_context);
2823                 }
2824         ;
2825
2826 protocoldef:
2827           PROTOCOL identifier protocolrefs
2828                 {
2829                   objc_pq_context = 1;
2830                   objc_interface_context
2831                     = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2832                 }
2833           methodprotolist END
2834                 {
2835                   objc_pq_context = 0;
2836                   finish_protocol(objc_interface_context);
2837                   objc_interface_context = NULL_TREE;
2838                 }
2839         /* The @protocol forward-declaration production introduces a
2840            reduce/reduce conflict on ';', which should be resolved in
2841            favor of the production 'identifier_list -> identifier'.  */
2842         | PROTOCOL identifier_list ';'
2843                 {
2844                   objc_declare_protocols ($2);
2845                 }
2846         ;
2847
2848 protocolrefs:
2849           /* empty */
2850                 {
2851                   $$ = NULL_TREE;
2852                 }
2853         | non_empty_protocolrefs
2854         ;
2855
2856 non_empty_protocolrefs:
2857           ARITHCOMPARE identifier_list ARITHCOMPARE
2858                 {
2859                   if ($1 == LT_EXPR && $3 == GT_EXPR)
2860                     $$ = $2;
2861                   else
2862                     YYERROR1;
2863                 }
2864         ;
2865
2866 ivar_decl_list:
2867           ivar_decl_list visibility_spec ivar_decls
2868         | ivar_decls
2869         ;
2870
2871 visibility_spec:
2872           PRIVATE { objc_public_flag = 2; }
2873         | PROTECTED { objc_public_flag = 0; }
2874         | PUBLIC { objc_public_flag = 1; }
2875         ;
2876
2877 ivar_decls:
2878           /* empty */
2879                 {
2880                   $$ = NULL_TREE;
2881                 }
2882         | ivar_decls ivar_decl ';'
2883         | ivar_decls ';'
2884                 {
2885                   if (pedantic)
2886                     pedwarn ("extra semicolon in struct or union specified");
2887                 }
2888         ;
2889
2890
2891 /* There is a shift-reduce conflict here, because `components' may
2892    start with a `typename'.  It happens that shifting (the default resolution)
2893    does the right thing, because it treats the `typename' as part of
2894    a `typed_typespecs'.
2895
2896    It is possible that this same technique would allow the distinction
2897    between `notype_initdecls' and `initdecls' to be eliminated.
2898    But I am being cautious and not trying it.  */
2899
2900 ivar_decl:
2901         declspecs_nosc_ts setspecs ivars
2902                 { $$ = $3;
2903                   POP_DECLSPEC_STACK; }
2904         | declspecs_nosc_nots setspecs ivars
2905                 { $$ = $3;
2906                   POP_DECLSPEC_STACK; }
2907         | error
2908                 { $$ = NULL_TREE; }
2909         ;
2910
2911 ivars:
2912           /* empty */
2913                 { $$ = NULL_TREE; }
2914         | ivar_declarator
2915         | ivars ',' maybe_resetattrs ivar_declarator
2916         ;
2917
2918 ivar_declarator:
2919           declarator
2920                 {
2921                   $$ = add_instance_variable (objc_ivar_context,
2922                                               objc_public_flag,
2923                                               $1, current_declspecs,
2924                                               NULL_TREE);
2925                 }
2926         | declarator ':' expr_no_commas
2927                 {
2928                   $$ = add_instance_variable (objc_ivar_context,
2929                                               objc_public_flag,
2930                                               $1, current_declspecs, $3);
2931                 }
2932         | ':' expr_no_commas
2933                 {
2934                   $$ = add_instance_variable (objc_ivar_context,
2935                                               objc_public_flag,
2936                                               NULL_TREE,
2937                                               current_declspecs, $2);
2938                 }
2939         ;
2940
2941 methodtype:
2942           '+'
2943                 { objc_inherit_code = CLASS_METHOD_DECL; }
2944         | '-'
2945                 { objc_inherit_code = INSTANCE_METHOD_DECL; }
2946         ;
2947
2948 methoddef:
2949           methodtype
2950                 {
2951                   objc_pq_context = 1;
2952                   if (!objc_implementation_context)
2953                     fatal_error ("method definition not in class context");
2954                 }
2955           methoddecl
2956                 {
2957                   objc_pq_context = 0;
2958                   objc_add_method (objc_implementation_context,
2959                                    $3,
2960                                    objc_inherit_code == CLASS_METHOD_DECL);
2961                   start_method_def ($3);
2962                 }
2963           optarglist
2964                 {
2965                   continue_method_def ();
2966                 }
2967           compstmt_or_error
2968                 {
2969                   finish_method_def ();
2970                 }
2971         ;
2972
2973 /* the reason for the strange actions in this rule
2974  is so that notype_initdecls when reached via datadef
2975  can find a valid list of type and sc specs in $0. */
2976
2977 methodprotolist:
2978           /* empty  */
2979         | methodprotolist methodproto
2980         | methodprotolist { $<ttype>$ = NULL_TREE; } datadef
2981         ;
2982
2983 semi_or_error:
2984           ';'
2985         | error
2986         ;
2987
2988 methodproto:
2989           methodtype
2990                 {
2991                   /* Remember protocol qualifiers in prototypes.  */
2992                   objc_pq_context = 1;
2993                 }
2994           methoddecl
2995                 {
2996                   /* Forget protocol qualifiers here.  */
2997                   objc_pq_context = 0;
2998                   objc_add_method (objc_interface_context,
2999                                    $3,
3000                                    objc_inherit_code == CLASS_METHOD_DECL);
3001                 }
3002           semi_or_error
3003         ;
3004
3005 methoddecl:
3006           '(' typename ')' unaryselector
3007                 {
3008                   $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
3009                 }
3010
3011         | unaryselector
3012                 {
3013                   $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
3014                 }
3015
3016         | '(' typename ')' keywordselector optparmlist
3017                 {
3018                   $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
3019                 }
3020
3021         | keywordselector optparmlist
3022                 {
3023                   $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
3024                 }
3025         ;
3026
3027 /* "optarglist" assumes that start_method_def has already been called...
3028    if it is not, the "xdecls" will not be placed in the proper scope */
3029
3030 optarglist:
3031           /* empty */
3032         | ';' myxdecls
3033         ;
3034
3035 /* to get around the following situation: "int foo (int a) int b; {}" that
3036    is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
3037
3038 myxdecls:
3039           /* empty */
3040         | mydecls
3041         ;
3042
3043 mydecls:
3044         mydecl
3045         | errstmt
3046         | mydecls mydecl
3047         | mydecl errstmt
3048         ;
3049
3050 mydecl:
3051         declspecs_ts setspecs myparms ';'
3052                 { POP_DECLSPEC_STACK; }
3053         | declspecs_ts ';'
3054                 { shadow_tag ($1); }
3055         | declspecs_nots ';'
3056                 { pedwarn ("empty declaration"); }
3057         ;
3058
3059 myparms:
3060         myparm
3061                 { push_parm_decl ($1); }
3062         | myparms ',' myparm
3063                 { push_parm_decl ($3); }
3064         ;
3065
3066 /* A single parameter declaration or parameter type name,
3067    as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
3068
3069 myparm:
3070           parm_declarator maybe_attribute
3071                 { $$ = build_tree_list (build_tree_list (current_declspecs,
3072                                                          $1),
3073                                         chainon ($2, all_prefix_attributes)); }
3074         | notype_declarator maybe_attribute
3075                 { $$ = build_tree_list (build_tree_list (current_declspecs,
3076                                                          $1),
3077                                         chainon ($2, all_prefix_attributes)); }
3078         | absdcl_maybe_attribute
3079                 { $$ = $1; }
3080         ;
3081
3082 optparmlist:
3083           /* empty */
3084                 {
3085                   $$ = NULL_TREE;
3086                 }
3087         | ',' ELLIPSIS
3088                 {
3089                   /* oh what a kludge! */
3090                   $$ = objc_ellipsis_node;
3091                 }
3092         | ','
3093                 {
3094                   pushlevel (0);
3095                 }
3096           parmlist_2
3097                 {
3098                   /* returns a tree list node generated by get_parm_info */
3099                   $$ = $3;
3100                   poplevel (0, 0, 0);
3101                 }
3102         ;
3103
3104 unaryselector:
3105           selector
3106         ;
3107
3108 keywordselector:
3109           keyworddecl
3110
3111         | keywordselector keyworddecl
3112                 {
3113                   $$ = chainon ($1, $2);
3114                 }
3115         ;
3116
3117 selector:
3118           IDENTIFIER
3119         | TYPENAME
3120         | CLASSNAME
3121         | OBJECTNAME
3122         | reservedwords
3123         ;
3124
3125 reservedwords:
3126           ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
3127         | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
3128         | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
3129         | TYPESPEC | TYPE_QUAL
3130         ;
3131
3132 keyworddecl:
3133           selector ':' '(' typename ')' identifier
3134                 {
3135                   $$ = build_keyword_decl ($1, $4, $6);
3136                 }
3137
3138         | selector ':' identifier
3139                 {
3140                   $$ = build_keyword_decl ($1, NULL_TREE, $3);
3141                 }
3142
3143         | ':' '(' typename ')' identifier
3144                 {
3145                   $$ = build_keyword_decl (NULL_TREE, $3, $5);
3146                 }
3147
3148         | ':' identifier
3149                 {
3150                   $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
3151                 }
3152         ;
3153
3154 messageargs:
3155           selector
3156         | keywordarglist
3157         ;
3158
3159 keywordarglist:
3160           keywordarg
3161         | keywordarglist keywordarg
3162                 {
3163                   $$ = chainon ($1, $2);
3164                 }
3165         ;
3166
3167
3168 keywordexpr:
3169           nonnull_exprlist
3170                 {
3171                   if (TREE_CHAIN ($1) == NULL_TREE)
3172                     /* just return the expr., remove a level of indirection */
3173                     $$ = TREE_VALUE ($1);
3174                   else
3175                     /* we have a comma expr., we will collapse later */
3176                     $$ = $1;
3177                 }
3178         ;
3179
3180 keywordarg:
3181           selector ':' keywordexpr
3182                 {
3183                   $$ = build_tree_list ($1, $3);
3184                 }
3185         | ':' keywordexpr
3186                 {
3187                   $$ = build_tree_list (NULL_TREE, $2);
3188                 }
3189         ;
3190
3191 receiver:
3192           expr
3193         | CLASSNAME
3194                 {
3195                   $$ = get_class_reference ($1);
3196                 }
3197         | TYPENAME
3198                 {
3199                   $$ = get_class_reference ($1);
3200                 }
3201         ;
3202
3203 objcmessageexpr:
3204           '[' receiver messageargs ']'
3205                 { $$ = build_tree_list ($2, $3); }
3206         ;
3207
3208 selectorarg:
3209           selector
3210         | keywordnamelist
3211         ;
3212
3213 keywordnamelist:
3214           keywordname
3215         | keywordnamelist keywordname
3216                 {
3217                   $$ = chainon ($1, $2);
3218                 }
3219         ;
3220
3221 keywordname:
3222           selector ':'
3223                 {
3224                   $$ = build_tree_list ($1, NULL_TREE);
3225                 }
3226         | ':'
3227                 {
3228                   $$ = build_tree_list (NULL_TREE, NULL_TREE);
3229                 }
3230         ;
3231
3232 objcselectorexpr:
3233           SELECTOR '(' selectorarg ')'
3234                 {
3235                   $$ = $3;
3236                 }
3237         ;
3238
3239 objcprotocolexpr:
3240           PROTOCOL '(' identifier ')'
3241                 {
3242                   $$ = $3;
3243                 }
3244         ;
3245
3246 /* extension to support C-structures in the archiver */
3247
3248 objcencodeexpr:
3249           ENCODE '(' typename ')'
3250                 {
3251                   $$ = groktypename ($3);
3252                 }
3253         ;
3254
3255 @@end_ifobjc
3256 %%
3257
3258 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3259    cpplib.h's token codes into yacc's token codes.  */
3260
3261 static enum cpp_ttype last_token;
3262
3263 /* The reserved keyword table.  */
3264 struct resword
3265 {
3266   const char *word;
3267   ENUM_BITFIELD(rid) rid : 16;
3268   unsigned int disable   : 16;
3269 };
3270
3271 /* Disable mask.  Keywords are disabled if (reswords[i].disable & mask) is
3272    _true_.  */
3273 #define D_C89   0x01    /* not in C89 */
3274 #define D_EXT   0x02    /* GCC extension */
3275 #define D_EXT89 0x04    /* GCC extension incorporated in C99 */
3276 #define D_OBJC  0x08    /* Objective C only */
3277
3278 static const struct resword reswords[] =
3279 {
3280   { "_Bool",            RID_BOOL,       0 },
3281   { "_Complex",         RID_COMPLEX,    0 },
3282   { "__FUNCTION__",     RID_FUNCTION_NAME, 0 },
3283   { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3284   { "__alignof",        RID_ALIGNOF,    0 },
3285   { "__alignof__",      RID_ALIGNOF,    0 },
3286   { "__asm",            RID_ASM,        0 },
3287   { "__asm__",          RID_ASM,        0 },
3288   { "__attribute",      RID_ATTRIBUTE,  0 },
3289   { "__attribute__",    RID_ATTRIBUTE,  0 },
3290   { "__builtin_choose_expr", RID_CHOOSE_EXPR, 0 },
3291   { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, 0 },
3292   { "__builtin_va_arg", RID_VA_ARG,     0 },
3293   { "__complex",        RID_COMPLEX,    0 },
3294   { "__complex__",      RID_COMPLEX,    0 },
3295   { "__const",          RID_CONST,      0 },
3296   { "__const__",        RID_CONST,      0 },
3297   { "__extension__",    RID_EXTENSION,  0 },
3298   { "__func__",         RID_C99_FUNCTION_NAME, 0 },
3299   { "__imag",           RID_IMAGPART,   0 },
3300   { "__imag__",         RID_IMAGPART,   0 },
3301   { "__inline",         RID_INLINE,     0 },
3302   { "__inline__",       RID_INLINE,     0 },
3303   { "__label__",        RID_LABEL,      0 },
3304   { "__ptrbase",        RID_PTRBASE,    0 },
3305   { "__ptrbase__",      RID_PTRBASE,    0 },
3306   { "__ptrextent",      RID_PTREXTENT,  0 },
3307   { "__ptrextent__",    RID_PTREXTENT,  0 },
3308   { "__ptrvalue",       RID_PTRVALUE,   0 },
3309   { "__ptrvalue__",     RID_PTRVALUE,   0 },
3310   { "__real",           RID_REALPART,   0 },
3311   { "__real__",         RID_REALPART,   0 },
3312   { "__restrict",       RID_RESTRICT,   0 },
3313   { "__restrict__",     RID_RESTRICT,   0 },
3314   { "__signed",         RID_SIGNED,     0 },
3315   { "__signed__",       RID_SIGNED,     0 },
3316   { "__thread",         RID_THREAD,     0 },
3317   { "__typeof",         RID_TYPEOF,     0 },
3318   { "__typeof__",       RID_TYPEOF,     0 },
3319   { "__volatile",       RID_VOLATILE,   0 },
3320   { "__volatile__",     RID_VOLATILE,   0 },
3321   { "asm",              RID_ASM,        D_EXT },
3322   { "auto",             RID_AUTO,       0 },
3323   { "break",            RID_BREAK,      0 },
3324   { "case",             RID_CASE,       0 },
3325   { "char",             RID_CHAR,       0 },
3326   { "const",            RID_CONST,      0 },
3327   { "continue",         RID_CONTINUE,   0 },
3328   { "default",          RID_DEFAULT,    0 },
3329   { "do",               RID_DO,         0 },
3330   { "double",           RID_DOUBLE,     0 },
3331   { "else",             RID_ELSE,       0 },
3332   { "enum",             RID_ENUM,       0 },
3333   { "extern",           RID_EXTERN,     0 },
3334   { "float",            RID_FLOAT,      0 },
3335   { "for",              RID_FOR,        0 },
3336   { "goto",             RID_GOTO,       0 },
3337   { "if",               RID_IF,         0 },
3338   { "inline",           RID_INLINE,     D_EXT89 },
3339   { "int",              RID_INT,        0 },
3340   { "long",             RID_LONG,       0 },
3341   { "register",         RID_REGISTER,   0 },
3342   { "restrict",         RID_RESTRICT,   D_C89 },
3343   { "return",           RID_RETURN,     0 },
3344   { "short",            RID_SHORT,      0 },
3345   { "signed",           RID_SIGNED,     0 },
3346   { "sizeof",           RID_SIZEOF,     0 },
3347   { "static",           RID_STATIC,     0 },
3348   { "struct",           RID_STRUCT,     0 },
3349   { "switch",           RID_SWITCH,     0 },
3350   { "typedef",          RID_TYPEDEF,    0 },
3351   { "typeof",           RID_TYPEOF,     D_EXT },
3352   { "union",            RID_UNION,      0 },
3353   { "unsigned",         RID_UNSIGNED,   0 },
3354   { "void",             RID_VOID,       0 },
3355   { "volatile",         RID_VOLATILE,   0 },
3356   { "while",            RID_WHILE,      0 },
3357 @@ifobjc
3358   { "id",               RID_ID,                 D_OBJC },
3359
3360   /* These objc keywords are recognized only immediately after
3361      an '@'.  */
3362   { "class",            RID_AT_CLASS,           D_OBJC },
3363   { "compatibility_alias", RID_AT_ALIAS,        D_OBJC },
3364   { "defs",             RID_AT_DEFS,            D_OBJC },
3365   { "encode",           RID_AT_ENCODE,          D_OBJC },
3366   { "end",              RID_AT_END,             D_OBJC },
3367   { "implementation",   RID_AT_IMPLEMENTATION,  D_OBJC },
3368   { "interface",        RID_AT_INTERFACE,       D_OBJC },
3369   { "private",          RID_AT_PRIVATE,         D_OBJC },
3370   { "protected",        RID_AT_PROTECTED,       D_OBJC },
3371   { "protocol",         RID_AT_PROTOCOL,        D_OBJC },
3372   { "public",           RID_AT_PUBLIC,          D_OBJC },
3373   { "selector",         RID_AT_SELECTOR,        D_OBJC },
3374   { "throw",            RID_AT_THROW,           D_OBJC },
3375   { "try",              RID_AT_TRY,             D_OBJC },
3376   { "catch",            RID_AT_CATCH,           D_OBJC },
3377   { "finally",          RID_AT_FINALLY,         D_OBJC },
3378   { "synchronized",     RID_AT_SYNCHRONIZED,    D_OBJC },
3379   /* These are recognized only in protocol-qualifier context
3380      (see above) */
3381   { "bycopy",           RID_BYCOPY,             D_OBJC },
3382   { "byref",            RID_BYREF,              D_OBJC },
3383   { "in",               RID_IN,                 D_OBJC },
3384   { "inout",            RID_INOUT,              D_OBJC },
3385   { "oneway",           RID_ONEWAY,             D_OBJC },
3386   { "out",              RID_OUT,                D_OBJC },
3387 @@end_ifobjc
3388 };
3389 #define N_reswords (sizeof reswords / sizeof (struct resword))
3390
3391 /* Table mapping from RID_* constants to yacc token numbers.
3392    Unfortunately we have to have entries for all the keywords in all
3393    three languages.  */
3394 static const short rid_to_yy[RID_MAX] =
3395 {
3396   /* RID_STATIC */      STATIC,
3397   /* RID_UNSIGNED */    TYPESPEC,
3398   /* RID_LONG */        TYPESPEC,
3399   /* RID_CONST */       TYPE_QUAL,
3400   /* RID_EXTERN */      SCSPEC,
3401   /* RID_REGISTER */    SCSPEC,
3402   /* RID_TYPEDEF */     SCSPEC,
3403   /* RID_SHORT */       TYPESPEC,
3404   /* RID_INLINE */      SCSPEC,
3405   /* RID_VOLATILE */    TYPE_QUAL,
3406   /* RID_SIGNED */      TYPESPEC,
3407   /* RID_AUTO */        SCSPEC,
3408   /* RID_RESTRICT */    TYPE_QUAL,
3409
3410   /* C extensions */
3411   /* RID_COMPLEX */     TYPESPEC,
3412   /* RID_THREAD */      SCSPEC,
3413
3414   /* C++ */
3415   /* RID_FRIEND */      0,
3416   /* RID_VIRTUAL */     0,
3417   /* RID_EXPLICIT */    0,
3418   /* RID_EXPORT */      0,
3419   /* RID_MUTABLE */     0,
3420
3421   /* ObjC */
3422   /* RID_IN */          TYPE_QUAL,
3423   /* RID_OUT */         TYPE_QUAL,
3424   /* RID_INOUT */       TYPE_QUAL,
3425   /* RID_BYCOPY */      TYPE_QUAL,
3426   /* RID_BYREF */       TYPE_QUAL,
3427   /* RID_ONEWAY */      TYPE_QUAL,
3428
3429   /* C */
3430   /* RID_INT */         TYPESPEC,
3431   /* RID_CHAR */        TYPESPEC,
3432   /* RID_FLOAT */       TYPESPEC,
3433   /* RID_DOUBLE */      TYPESPEC,
3434   /* RID_VOID */        TYPESPEC,
3435   /* RID_ENUM */        ENUM,
3436   /* RID_STRUCT */      STRUCT,
3437   /* RID_UNION */       UNION,
3438   /* RID_IF */          IF,
3439   /* RID_ELSE */        ELSE,
3440   /* RID_WHILE */       WHILE,
3441   /* RID_DO */          DO,
3442   /* RID_FOR */         FOR,
3443   /* RID_SWITCH */      SWITCH,
3444   /* RID_CASE */        CASE,
3445   /* RID_DEFAULT */     DEFAULT,
3446   /* RID_BREAK */       BREAK,
3447   /* RID_CONTINUE */    CONTINUE,
3448   /* RID_RETURN */      RETURN,
3449   /* RID_GOTO */        GOTO,
3450   /* RID_SIZEOF */      SIZEOF,
3451
3452   /* C extensions */
3453   /* RID_ASM */         ASM_KEYWORD,
3454   /* RID_TYPEOF */      TYPEOF,
3455   /* RID_ALIGNOF */     ALIGNOF,
3456   /* RID_ATTRIBUTE */   ATTRIBUTE,
3457   /* RID_VA_ARG */      VA_ARG,
3458   /* RID_EXTENSION */   EXTENSION,
3459   /* RID_IMAGPART */    IMAGPART,
3460   /* RID_REALPART */    REALPART,
3461   /* RID_LABEL */       LABEL,
3462   /* RID_PTRBASE */     PTR_BASE,
3463   /* RID_PTREXTENT */   PTR_EXTENT,
3464   /* RID_PTRVALUE */    PTR_VALUE,
3465
3466   /* RID_CHOOSE_EXPR */                 CHOOSE_EXPR,
3467   /* RID_TYPES_COMPATIBLE_P */          TYPES_COMPATIBLE_P,
3468
3469   /* RID_FUNCTION_NAME */               FUNC_NAME,
3470   /* RID_PRETTY_FUNCTION_NAME */        FUNC_NAME,
3471   /* RID_C99_FUNCTION_NAME */           FUNC_NAME,
3472
3473   /* C++ */
3474   /* RID_BOOL */        TYPESPEC,
3475   /* RID_WCHAR */       0,
3476   /* RID_CLASS */       0,
3477   /* RID_PUBLIC */      0,
3478   /* RID_PRIVATE */     0,
3479   /* RID_PROTECTED */   0,
3480   /* RID_TEMPLATE */    0,
3481   /* RID_NULL */        0,
3482   /* RID_CATCH */       0,
3483   /* RID_DELETE */      0,
3484   /* RID_FALSE */       0,
3485   /* RID_NAMESPACE */   0,
3486   /* RID_NEW */         0,
3487   /* RID_OPERATOR */    0,
3488   /* RID_THIS */        0,
3489   /* RID_THROW */       0,
3490   /* RID_TRUE */        0,
3491   /* RID_TRY */         0,
3492   /* RID_TYPENAME */    0,
3493   /* RID_TYPEID */      0,
3494   /* RID_USING */       0,
3495
3496   /* casts */
3497   /* RID_CONSTCAST */   0,
3498   /* RID_DYNCAST */     0,
3499   /* RID_REINTCAST */   0,
3500   /* RID_STATCAST */    0,
3501
3502   /* Objective C */
3503   /* RID_ID */                  OBJECTNAME,
3504   /* RID_AT_ENCODE */           ENCODE,
3505   /* RID_AT_END */              END,
3506   /* RID_AT_CLASS */            CLASS,
3507   /* RID_AT_ALIAS */            ALIAS,
3508   /* RID_AT_DEFS */             DEFS,
3509   /* RID_AT_PRIVATE */          PRIVATE,
3510   /* RID_AT_PROTECTED */        PROTECTED,
3511   /* RID_AT_PUBLIC */           PUBLIC,
3512   /* RID_AT_PROTOCOL */         PROTOCOL,
3513   /* RID_AT_SELECTOR */         SELECTOR,
3514   /* RID_AT_THROW */            AT_THROW,
3515   /* RID_AT_TRY */              AT_TRY,
3516   /* RID_AT_CATCH */            AT_CATCH,
3517   /* RID_AT_FINALLY */          AT_FINALLY,
3518   /* RID_AT_SYNCHRONIZED */     AT_SYNCHRONIZED,
3519   /* RID_AT_INTERFACE */        INTERFACE,
3520   /* RID_AT_IMPLEMENTATION */   IMPLEMENTATION
3521 };
3522
3523 static void
3524 init_reswords (void)
3525 {
3526   unsigned int i;
3527   tree id;
3528   int mask = (flag_isoc99 ? 0 : D_C89)
3529               | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
3530
3531   if (!c_dialect_objc ())
3532      mask |= D_OBJC;
3533
3534   ridpointers = ggc_calloc ((int) RID_MAX, sizeof (tree));
3535   for (i = 0; i < N_reswords; i++)
3536     {
3537       /* If a keyword is disabled, do not enter it into the table
3538          and so create a canonical spelling that isn't a keyword.  */
3539       if (reswords[i].disable & mask)
3540         continue;
3541
3542       id = get_identifier (reswords[i].word);
3543       C_RID_CODE (id) = reswords[i].rid;
3544       C_IS_RESERVED_WORD (id) = 1;
3545       ridpointers [(int) reswords[i].rid] = id;
3546     }
3547 }
3548
3549 #define NAME(type) cpp_type2name (type)
3550
3551 static void
3552 yyerror (const char *msgid)
3553 {
3554   const char *string = _(msgid);
3555
3556   if (last_token == CPP_EOF)
3557     error ("%s at end of input", string);
3558   else if (last_token == CPP_CHAR || last_token == CPP_WCHAR)
3559     {
3560       unsigned int val = TREE_INT_CST_LOW (yylval.ttype);
3561       const char *const ell = (last_token == CPP_CHAR) ? "" : "L";
3562       if (val <= UCHAR_MAX && ISGRAPH (val))
3563         error ("%s before %s'%c'", string, ell, val);
3564       else
3565         error ("%s before %s'\\x%x'", string, ell, val);
3566     }
3567   else if (last_token == CPP_STRING
3568            || last_token == CPP_WSTRING)
3569     error ("%s before string constant", string);
3570   else if (last_token == CPP_NUMBER)
3571     error ("%s before numeric constant", string);
3572   else if (last_token == CPP_NAME)
3573     error ("%s before \"%s\"", string, IDENTIFIER_POINTER (yylval.ttype));
3574   else
3575     error ("%s before '%s' token", string, NAME(last_token));
3576 }
3577
3578 static int
3579 yylexname (void)
3580 {
3581   tree decl;
3582
3583 @@ifobjc
3584   int objc_force_identifier = objc_need_raw_identifier;
3585   OBJC_NEED_RAW_IDENTIFIER (0);
3586 @@end_ifobjc
3587
3588   if (C_IS_RESERVED_WORD (yylval.ttype))
3589     {
3590       enum rid rid_code = C_RID_CODE (yylval.ttype);
3591
3592 @@ifobjc
3593       /* Turn non-typedefed refs to "id" into plain identifiers; this
3594          allows constructs like "void foo(id id);" to work.  */
3595       if (rid_code == RID_ID)
3596       {
3597         decl = lookup_name (yylval.ttype);
3598         if (decl == NULL_TREE || TREE_CODE (decl) != TYPE_DECL)
3599           return IDENTIFIER;
3600       }
3601
3602       if (!OBJC_IS_AT_KEYWORD (rid_code)
3603           && (!OBJC_IS_PQ_KEYWORD (rid_code) || objc_pq_context))
3604 @@end_ifobjc
3605       {
3606         /* Return the canonical spelling for this keyword.  */
3607         yylval.ttype = ridpointers[(int) rid_code];
3608         return rid_to_yy[(int) rid_code];
3609       }
3610     }
3611
3612   decl = lookup_name (yylval.ttype);
3613   if (decl)
3614     {
3615       if (TREE_CODE (decl) == TYPE_DECL)
3616         return TYPENAME;
3617     }
3618 @@ifobjc
3619   else
3620     {
3621       tree objc_interface_decl = is_class_name (yylval.ttype);
3622       /* ObjC class names are in the same namespace as variables and
3623          typedefs, and hence are shadowed by local declarations.  */
3624       if (objc_interface_decl
3625           && (global_bindings_p ()
3626               || (!objc_force_identifier && !decl)))
3627         {
3628           yylval.ttype = objc_interface_decl;
3629           return CLASSNAME;
3630         }
3631     }
3632 @@end_ifobjc
3633
3634   return IDENTIFIER;
3635 }
3636
3637 static inline int
3638 _yylex (void)
3639 {
3640  get_next:
3641   last_token = c_lex (&yylval.ttype);
3642   switch (last_token)
3643     {
3644     case CPP_EQ:                                        return '=';
3645     case CPP_NOT:                                       return '!';
3646     case CPP_GREATER:   yylval.code = GT_EXPR;          return ARITHCOMPARE;
3647     case CPP_LESS:      yylval.code = LT_EXPR;          return ARITHCOMPARE;
3648     case CPP_PLUS:      yylval.code = PLUS_EXPR;        return '+';
3649     case CPP_MINUS:     yylval.code = MINUS_EXPR;       return '-';
3650     case CPP_MULT:      yylval.code = MULT_EXPR;        return '*';
3651     case CPP_DIV:       yylval.code = TRUNC_DIV_EXPR;   return '/';
3652     case CPP_MOD:       yylval.code = TRUNC_MOD_EXPR;   return '%';
3653     case CPP_AND:       yylval.code = BIT_AND_EXPR;     return '&';
3654     case CPP_OR:        yylval.code = BIT_IOR_EXPR;     return '|';
3655     case CPP_XOR:       yylval.code = BIT_XOR_EXPR;     return '^';
3656     case CPP_RSHIFT:    yylval.code = RSHIFT_EXPR;      return RSHIFT;
3657     case CPP_LSHIFT:    yylval.code = LSHIFT_EXPR;      return LSHIFT;
3658
3659     case CPP_COMPL:                                     return '~';
3660     case CPP_AND_AND:                                   return ANDAND;
3661     case CPP_OR_OR:                                     return OROR;
3662     case CPP_QUERY:                                     return '?';
3663     case CPP_OPEN_PAREN:                                return '(';
3664     case CPP_EQ_EQ:     yylval.code = EQ_EXPR;          return EQCOMPARE;
3665     case CPP_NOT_EQ:    yylval.code = NE_EXPR;          return EQCOMPARE;
3666     case CPP_GREATER_EQ:yylval.code = GE_EXPR;          return ARITHCOMPARE;
3667     case CPP_LESS_EQ:   yylval.code = LE_EXPR;          return ARITHCOMPARE;
3668
3669     case CPP_PLUS_EQ:   yylval.code = PLUS_EXPR;        return ASSIGN;
3670     case CPP_MINUS_EQ:  yylval.code = MINUS_EXPR;       return ASSIGN;
3671     case CPP_MULT_EQ:   yylval.code = MULT_EXPR;        return ASSIGN;
3672     case CPP_DIV_EQ:    yylval.code = TRUNC_DIV_EXPR;   return ASSIGN;
3673     case CPP_MOD_EQ:    yylval.code = TRUNC_MOD_EXPR;   return ASSIGN;
3674     case CPP_AND_EQ:    yylval.code = BIT_AND_EXPR;     return ASSIGN;
3675     case CPP_OR_EQ:     yylval.code = BIT_IOR_EXPR;     return ASSIGN;
3676     case CPP_XOR_EQ:    yylval.code = BIT_XOR_EXPR;     return ASSIGN;
3677     case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR;      return ASSIGN;
3678     case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR;      return ASSIGN;
3679
3680     case CPP_OPEN_SQUARE:                               return '[';
3681     case CPP_CLOSE_SQUARE:                              return ']';
3682     case CPP_OPEN_BRACE:                                return '{';
3683     case CPP_CLOSE_BRACE:                               return '}';
3684     case CPP_ELLIPSIS:                                  return ELLIPSIS;
3685
3686     case CPP_PLUS_PLUS:                                 return PLUSPLUS;
3687     case CPP_MINUS_MINUS:                               return MINUSMINUS;
3688     case CPP_DEREF:                                     return POINTSAT;
3689     case CPP_DOT:                                       return '.';
3690
3691       /* The following tokens may affect the interpretation of any
3692          identifiers following, if doing Objective-C.  */
3693     case CPP_COLON:             OBJC_NEED_RAW_IDENTIFIER (0);   return ':';
3694     case CPP_COMMA:             OBJC_NEED_RAW_IDENTIFIER (0);   return ',';
3695     case CPP_CLOSE_PAREN:       OBJC_NEED_RAW_IDENTIFIER (0);   return ')';
3696     case CPP_SEMICOLON:         OBJC_NEED_RAW_IDENTIFIER (0);   return ';';
3697
3698     case CPP_EOF:
3699       return 0;
3700
3701     case CPP_NAME:
3702       return yylexname ();
3703
3704     case CPP_AT_NAME:
3705       /* This only happens in Objective-C; it must be a keyword.  */
3706       return rid_to_yy [(int) C_RID_CODE (yylval.ttype)];
3707
3708     case CPP_NUMBER:
3709     case CPP_CHAR:
3710     case CPP_WCHAR:
3711       return CONSTANT;
3712
3713     case CPP_STRING:
3714     case CPP_WSTRING:
3715       return STRING;
3716
3717     case CPP_OBJC_STRING:
3718       return OBJC_STRING;
3719
3720       /* These tokens are C++ specific (and will not be generated
3721          in C mode, but let's be cautious).  */
3722     case CPP_SCOPE:
3723     case CPP_DEREF_STAR:
3724     case CPP_DOT_STAR:
3725     case CPP_MIN_EQ:
3726     case CPP_MAX_EQ:
3727     case CPP_MIN:
3728     case CPP_MAX:
3729       /* These tokens should not survive translation phase 4.  */
3730     case CPP_HASH:
3731     case CPP_PASTE:
3732       error ("syntax error at '%s' token", NAME(last_token));
3733       goto get_next;
3734
3735     default:
3736       abort ();
3737     }
3738   /* NOTREACHED */
3739 }
3740
3741 static int
3742 yylex (void)
3743 {
3744   int r;
3745   timevar_push (TV_LEX);
3746   r = _yylex();
3747   timevar_pop (TV_LEX);
3748   return r;
3749 }
3750
3751 /* Function used when yydebug is set, to print a token in more detail.  */
3752
3753 static void
3754 yyprint (FILE *file, int yychar, YYSTYPE yyl)
3755 {
3756   tree t = yyl.ttype;
3757
3758   fprintf (file, " [%s]", NAME(last_token));
3759
3760   switch (yychar)
3761     {
3762     case IDENTIFIER:
3763     case TYPENAME:
3764     case OBJECTNAME:
3765     case TYPESPEC:
3766     case TYPE_QUAL:
3767     case SCSPEC:
3768     case STATIC:
3769       if (IDENTIFIER_POINTER (t))
3770         fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
3771       break;
3772
3773     case CONSTANT:
3774       fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3775       if (TREE_CODE (t) == INTEGER_CST)
3776         {
3777           fputs (" ", file);
3778           fprintf (file, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
3779                    TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3780         }
3781       break;
3782     }
3783 }
3784 \f
3785 /* This is not the ideal place to put these, but we have to get them out
3786    of c-lex.c because cp/lex.c has its own versions.  */
3787
3788 /* Free malloced parser stacks if necessary.  */
3789
3790 void
3791 free_parser_stacks (void)
3792 {
3793 }
3794
3795 /* Parse the file.  */
3796 void
3797 c_parse_file (void)
3798 {
3799   yyparse ();
3800   /* In case there were missing closebraces, get us back to the global
3801      binding level.  */
3802   while (! global_bindings_p ())
3803     poplevel (0, 0, 0);
3804   /* __FUNCTION__ is defined at file scope ("").  This
3805      call may not be necessary as my tests indicate it
3806      still works without it.  */
3807   finish_fname_decls ();
3808
3809   if (malloced_yyss)
3810     {
3811       free (malloced_yyss);
3812       free (malloced_yyvs);
3813       malloced_yyss = 0;
3814     }
3815 }
3816
3817 #include "gt-c-parse.h"