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 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 #ifdef MULTIBYTE_CHARS
  54 #include <locale.h>
  55 #endif
  56
  57 ifobjc
  58 #include "objc-act.h"
  59 end ifobjc
  60
  61 /* Like YYERROR but do call yyerror.  */
  62 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
  63
  64 /* Like the default stack expander, except (1) use realloc when possible,
  65    (2) impose no hard maxiumum on stack size, (3) REALLY do not use alloca.
  66
  67    Irritatingly, YYSTYPE is defined after this %{ %} block, so we cannot
  68    give malloced_yyvs its proper type.  This is ok since all we need from
  69    it is to be able to free it.  */
  70
  71 static short *malloced_yyss;
  72 static void *malloced_yyvs;
  73
  74 #define yyoverflow(MSG, SS, SSSIZE, VS, VSSIZE, YYSSZ)                  \
  75 do {                                                                    \
  76   size_t newsize;                                                       \
  77   short *newss;                                                         \
  78   YYSTYPE *newvs;                                                       \
  79   newsize = *(YYSSZ) *= 2;                                              \
  80   if (malloced_yyss)                                                    \
  81     {                                                                   \
  82       newss = (short *)                                                 \
  83         really_call_realloc (*(SS), newsize * sizeof (short));          \
  84       newvs = (YYSTYPE *)                                               \
  85         really_call_realloc (*(VS), newsize * sizeof (YYSTYPE));        \
  86     }                                                                   \
  87   else                                                                  \
  88     {                                                                   \
  89       newss = (short *) really_call_malloc (newsize * sizeof (short));  \
  90       newvs = (YYSTYPE *) really_call_malloc (newsize * sizeof (YYSTYPE)); \
  91       if (newss)                                                        \
  92         memcpy (newss, *(SS), (SSSIZE));                                \
  93       if (newvs)                                                        \
  94         memcpy (newvs, *(VS), (VSSIZE));                                \
  95     }                                                                   \
  96   if (!newss || !newvs)                                                 \
  97     {                                                                   \
  98       yyerror (MSG);                                                    \
  99       return 2;                                                         \
 100     }                                                                   \
 101   *(SS) = newss;                                                        \
 102   *(VS) = newvs;                                                        \
 103   malloced_yyss = newss;                                                \
 104   malloced_yyvs = (void *) newvs;                                       \
 105 } while (0)
 106 %}
 107
 108 %start program
 109
 110 %union {long itype; tree ttype; enum tree_code code;
 111         const char *filename; int lineno; }
 112
 113 /* All identifiers that are not reserved words
 114    and are not declared typedefs in the current block */
 115 %token IDENTIFIER
 116
 117 /* All identifiers that are declared typedefs in the current block.
 118    In some contexts, they are treated just like IDENTIFIER,
 119    but they can also serve as typespecs in declarations.  */
 120 %token TYPENAME
 121
 122 /* Reserved words that specify storage class.
 123    yylval contains an IDENTIFIER_NODE which indicates which one.  */
 124 %token SCSPEC                   /* Storage class other than static.  */
 125 %token STATIC                   /* Static storage class.  */
 126
 127 /* Reserved words that specify type.
 128    yylval contains an IDENTIFIER_NODE which indicates which one.  */
 129 %token TYPESPEC
 130
 131 /* Reserved words that qualify type: "const", "volatile", or "restrict".
 132    yylval contains an IDENTIFIER_NODE which indicates which one.  */
 133 %token TYPE_QUAL
 134
 135 /* Character or numeric constants.
 136    yylval is the node for the constant.  */
 137 %token CONSTANT
 138
 139 /* String constants in raw form.
 140    yylval is a STRING_CST node.  */
 141 %token STRING
 142
 143 /* "...", used for functions with variable arglists.  */
 144 %token ELLIPSIS
 145
 146 /* the reserved words */
 147 /* SCO include files test "ASM", so use something else. */
 148 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
 149 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
 150 %token ATTRIBUTE EXTENSION LABEL
 151 %token REALPART IMAGPART VA_ARG CHOOSE_EXPR TYPES_COMPATIBLE_P
 152 %token PTR_VALUE PTR_BASE PTR_EXTENT
 153
 154 /* function name can be a string const or a var decl. */
 155 %token STRING_FUNC_NAME VAR_FUNC_NAME
 156
 157 /* Add precedence rules to solve dangling else s/r conflict */
 158 %nonassoc IF
 159 %nonassoc ELSE
 160
 161 /* Define the operator tokens and their precedences.
 162    The value is an integer because, if used, it is the tree code
 163    to use in the expression made from the operator.  */
 164
 165 %right <code> ASSIGN '='
 166 %right <code> '?' ':'
 167 %left <code> OROR
 168 %left <code> ANDAND
 169 %left <code> '|'
 170 %left <code> '^'
 171 %left <code> '&'
 172 %left <code> EQCOMPARE
 173 %left <code> ARITHCOMPARE
 174 %left <code> LSHIFT RSHIFT
 175 %left <code> '+' '-'
 176 %left <code> '*' '/' '%'
 177 %right <code> UNARY PLUSPLUS MINUSMINUS
 178 %left HYPERUNARY
 179 %left <code> POINTSAT '.' '(' '['
 180
 181 /* The Objective-C keywords.  These are included in C and in
 182    Objective C, so that the token codes are the same in both.  */
 183 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
 184 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
 185
 186 %type <code> unop
 187 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
 188 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
 189
 190 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
 191 %type <ttype> expr_no_commas cast_expr unary_expr primary STRING
 192 %type <ttype> declspecs_nosc_nots_nosa_noea declspecs_nosc_nots_nosa_ea
 193 %type <ttype> declspecs_nosc_nots_sa_noea declspecs_nosc_nots_sa_ea
 194 %type <ttype> declspecs_nosc_ts_nosa_noea declspecs_nosc_ts_nosa_ea
 195 %type <ttype> declspecs_nosc_ts_sa_noea declspecs_nosc_ts_sa_ea
 196 %type <ttype> declspecs_sc_nots_nosa_noea declspecs_sc_nots_nosa_ea
 197 %type <ttype> declspecs_sc_nots_sa_noea declspecs_sc_nots_sa_ea
 198 %type <ttype> declspecs_sc_ts_nosa_noea declspecs_sc_ts_nosa_ea
 199 %type <ttype> declspecs_sc_ts_sa_noea declspecs_sc_ts_sa_ea
 200 %type <ttype> declspecs_ts declspecs_nots
 201 %type <ttype> declspecs_ts_nosa declspecs_nots_nosa
 202 %type <ttype> declspecs_nosc_ts declspecs_nosc_nots declspecs_nosc declspecs
 203 %type <ttype> maybe_type_quals_attrs typespec_nonattr typespec_attr
 204 %type <ttype> typespec_reserved_nonattr typespec_reserved_attr
 205 %type <ttype> typespec_nonreserved_nonattr
 206
 207 %type <ttype> scspec SCSPEC STATIC TYPESPEC TYPE_QUAL maybe_type_qual
 208 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
 209 %type <ttype> init maybeasm
 210 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
 211 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
 212 %type <ttype> any_word extension
 213
 214 %type <ttype> compstmt compstmt_start compstmt_nostart compstmt_primary_start
 215 %type <ttype> do_stmt_start poplevel stmt label
 216
 217 %type <ttype> c99_block_start c99_block_end
 218 %type <ttype> declarator
 219 %type <ttype> notype_declarator after_type_declarator
 220 %type <ttype> parm_declarator
 221 %type <ttype> parm_declarator_starttypename parm_declarator_nostarttypename
 222 %type <ttype> array_declarator
 223
 224 %type <ttype> structsp_attr structsp_nonattr
 225 %type <ttype> component_decl_list component_decl_list2
 226 %type <ttype> component_decl components components_notype component_declarator
 227 %type <ttype> component_notype_declarator
 228 %type <ttype> enumlist enumerator
 229 %type <ttype> struct_head union_head enum_head
 230 %type <ttype> typename absdcl absdcl1 absdcl1_ea absdcl1_noea
 231 %type <ttype> direct_absdcl1 absdcl_maybe_attribute
 232 %type <ttype> xexpr parms parm firstparm identifiers
 233
 234 %type <ttype> parmlist parmlist_1 parmlist_2
 235 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
 236 %type <ttype> identifiers_or_typenames
 237
 238 %type <itype> setspecs setspecs_fp
 239
 240 %type <filename> save_filename
 241 %type <lineno> save_lineno
 242 \f
 243 ifobjc
 244 /* the Objective-C nonterminals */
 245
 246 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
 247 %type <ttype> methoddecl unaryselector keywordselector selector
 248 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
 249 %type <ttype> keywordexpr keywordarglist keywordarg
 250 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
 251 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
 252 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
 253
 254 %type <ttype> CLASSNAME OBJECTNAME
 255 end ifobjc
 256 \f
 257 %{
 258 /* Number of statements (loosely speaking) and compound statements
 259    seen so far.  */
 260 static int stmt_count;
 261 static int compstmt_count;
 262
 263 /* Input file and line number of the end of the body of last simple_if;
 264    used by the stmt-rule immediately after simple_if returns.  */
 265 static const char *if_stmt_file;
 266 static int if_stmt_line;
 267
 268 /* List of types and structure classes of the current declaration.  */
 269 static GTY(()) tree current_declspecs;
 270 static GTY(()) tree prefix_attributes;
 271
 272 /* List of all the attributes applying to the identifier currently being
 273    declared; includes prefix_attributes and possibly some more attributes
 274    just after a comma.  */
 275 static GTY(()) tree all_prefix_attributes;
 276
 277 /* Stack of saved values of current_declspecs, prefix_attributes and
 278    all_prefix_attributes.  */
 279 static GTY(()) tree declspec_stack;
 280
 281 /* PUSH_DECLSPEC_STACK is called from setspecs; POP_DECLSPEC_STACK
 282    should be called from the productions making use of setspecs.  */
 283 #define PUSH_DECLSPEC_STACK                                              \
 284   do {                                                                   \
 285     declspec_stack = tree_cons (build_tree_list (prefix_attributes,      \
 286                                                  all_prefix_attributes), \
 287                                 current_declspecs,                       \
 288                                 declspec_stack);                         \
 289   } while (0)
 290
 291 #define POP_DECLSPEC_STACK                                              \
 292   do {                                                                  \
 293     current_declspecs = TREE_VALUE (declspec_stack);                    \
 294     prefix_attributes = TREE_PURPOSE (TREE_PURPOSE (declspec_stack));   \
 295     all_prefix_attributes = TREE_VALUE (TREE_PURPOSE (declspec_stack)); \
 296     declspec_stack = TREE_CHAIN (declspec_stack);                       \
 297   } while (0)
 298
 299 /* For __extension__, save/restore the warning flags which are
 300    controlled by __extension__.  */
 301 #define SAVE_EXT_FLAGS()                        \
 302         size_int (pedantic                      \
 303                   | (warn_pointer_arith << 1)   \
 304                   | (warn_traditional << 2)     \
 305                   | (flag_iso << 3))
 306
 307 #define RESTORE_EXT_FLAGS(tval)                 \
 308   do {                                          \
 309     int val = tree_low_cst (tval, 0);           \
 310     pedantic = val & 1;                         \
 311     warn_pointer_arith = (val >> 1) & 1;        \
 312     warn_traditional = (val >> 2) & 1;          \
 313     flag_iso = (val >> 3) & 1;                  \
 314   } while (0)
 315
 316 ifobjc
 317 /* Objective-C specific parser/lexer information */
 318
 319 static enum tree_code objc_inherit_code;
 320 static int objc_pq_context = 0, objc_public_flag = 0;
 321
 322 /* The following flag is needed to contextualize ObjC lexical analysis.
 323    In some cases (e.g., 'int NSObject;'), it is undesirable to bind
 324    an identifier to an ObjC class, even if a class with that name
 325    exists.  */
 326 static int objc_need_raw_identifier;
 327 #define OBJC_NEED_RAW_IDENTIFIER(VAL)   objc_need_raw_identifier = VAL
 328 end ifobjc
 329
 330 ifc
 331 #define OBJC_NEED_RAW_IDENTIFIER(VAL)   /* nothing */
 332 end ifc
 333
 334 static bool parsing_iso_function_signature;
 335
 336 /* Tell yyparse how to print a token's value, if yydebug is set.  */
 337
 338 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
 339
 340 static void yyprint       PARAMS ((FILE *, int, YYSTYPE));
 341 static void yyerror       PARAMS ((const char *));
 342 static int yylexname      PARAMS ((void));
 343 static int yylexstring    PARAMS ((void));
 344 static inline int _yylex  PARAMS ((void));
 345 static int  yylex         PARAMS ((void));
 346 static void init_reswords PARAMS ((void));
 347
 348   /* Initialisation routine for this file.  */
 349 void
 350 c_parse_init ()
 351 {
 352   init_reswords ();
 353 }
 354
 355 %}
 356 \f
 357 %%
 358 program: /* empty */
 359                 { if (pedantic)
 360                     pedwarn ("ISO C forbids an empty source file");
 361                   finish_file ();
 362                 }
 363         | extdefs
 364                 {
 365                   /* In case there were missing closebraces,
 366                      get us back to the global binding level.  */
 367                   while (! global_bindings_p ())
 368                     poplevel (0, 0, 0);
 369                   /* __FUNCTION__ is defined at file scope ("").  This
 370                      call may not be necessary as my tests indicate it
 371                      still works without it.  */
 372                   finish_fname_decls ();
 373                   finish_file ();
 374                 }
 375         ;
 376
 377 /* the reason for the strange actions in this rule
 378  is so that notype_initdecls when reached via datadef
 379  can find a valid list of type and sc specs in $0. */
 380
 381 extdefs:
 382         {$<ttype>$ = NULL_TREE; } extdef
 383         | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
 384         ;
 385
 386 extdef:
 387         extdef_1
 388         { parsing_iso_function_signature = false; } /* Reset after any external definition.  */
 389         ;
 390
 391 extdef_1:
 392         fndef
 393         | datadef
 394 ifobjc
 395         | objcdef
 396 end ifobjc
 397         | ASM_KEYWORD '(' expr ')' ';'
 398                 { STRIP_NOPS ($3);
 399                   if ((TREE_CODE ($3) == ADDR_EXPR
 400                        && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
 401                       || TREE_CODE ($3) == STRING_CST)
 402                     assemble_asm ($3);
 403                   else
 404                     error ("argument of `asm' is not a constant string"); }
 405         | extension extdef
 406                 { RESTORE_EXT_FLAGS ($1); }
 407         ;
 408
 409 datadef:
 410           setspecs notype_initdecls ';'
 411                 { if (pedantic)
 412                     error ("ISO C forbids data definition with no type or storage class");
 413                   else
 414                     warning ("data definition has no type or storage class");
 415
 416                   POP_DECLSPEC_STACK; }
 417         | declspecs_nots setspecs notype_initdecls ';'
 418                 { POP_DECLSPEC_STACK; }
 419         | declspecs_ts setspecs initdecls ';'
 420                 { POP_DECLSPEC_STACK; }
 421         | declspecs ';'
 422           { shadow_tag ($1); }
 423         | error ';'
 424         | error '}'
 425         | ';'
 426                 { if (pedantic)
 427                     pedwarn ("ISO C does not allow extra `;' outside of a function"); }
 428         ;
 429 \f
 430 fndef:
 431           declspecs_ts setspecs declarator
 432                 { if (! start_function (current_declspecs, $3,
 433                                         all_prefix_attributes))
 434                     YYERROR1;
 435                 }
 436           old_style_parm_decls
 437                 { store_parm_decls (); }
 438           save_filename save_lineno compstmt_or_error
 439                 { DECL_SOURCE_FILE (current_function_decl) = $7;
 440                   DECL_SOURCE_LINE (current_function_decl) = $8;
 441                   finish_function (0, 1);
 442                   POP_DECLSPEC_STACK; }
 443         | declspecs_ts setspecs declarator error
 444                 { POP_DECLSPEC_STACK; }
 445         | declspecs_nots setspecs notype_declarator
 446                 { if (! start_function (current_declspecs, $3,
 447                                         all_prefix_attributes))
 448                     YYERROR1;
 449                 }
 450           old_style_parm_decls
 451                 { store_parm_decls (); }
 452           save_filename save_lineno compstmt_or_error
 453                 { DECL_SOURCE_FILE (current_function_decl) = $7;
 454                   DECL_SOURCE_LINE (current_function_decl) = $8;
 455                   finish_function (0, 1);
 456                   POP_DECLSPEC_STACK; }
 457         | declspecs_nots setspecs notype_declarator error
 458                 { POP_DECLSPEC_STACK; }
 459         | setspecs notype_declarator
 460                 { if (! start_function (NULL_TREE, $2,
 461                                         all_prefix_attributes))
 462                     YYERROR1;
 463                 }
 464           old_style_parm_decls
 465                 { store_parm_decls (); }
 466           save_filename save_lineno compstmt_or_error
 467                 { DECL_SOURCE_FILE (current_function_decl) = $6;
 468                   DECL_SOURCE_LINE (current_function_decl) = $7;
 469                   finish_function (0, 1);
 470                   POP_DECLSPEC_STACK; }
 471         | setspecs notype_declarator error
 472                 { POP_DECLSPEC_STACK; }
 473         ;
 474
 475 identifier:
 476         IDENTIFIER
 477         | TYPENAME
 478 ifobjc
 479         | OBJECTNAME
 480         | CLASSNAME
 481 end ifobjc
 482         ;
 483
 484 unop:     '&'
 485                 { $$ = ADDR_EXPR; }
 486         | '-'
 487                 { $$ = NEGATE_EXPR; }
 488         | '+'
 489                 { $$ = CONVERT_EXPR;
 490 ifc
 491   if (warn_traditional && !in_system_header)
 492     warning ("traditional C rejects the unary plus operator");
 493 end ifc
 494                 }
 495         | PLUSPLUS
 496                 { $$ = PREINCREMENT_EXPR; }
 497         | MINUSMINUS
 498                 { $$ = PREDECREMENT_EXPR; }
 499         | '~'
 500                 { $$ = BIT_NOT_EXPR; }
 501         | '!'
 502                 { $$ = TRUTH_NOT_EXPR; }
 503         ;
 504
 505 expr:   nonnull_exprlist
 506                 { $$ = build_compound_expr ($1); }
 507         ;
 508
 509 exprlist:
 510           /* empty */
 511                 { $$ = NULL_TREE; }
 512         | nonnull_exprlist
 513         ;
 514
 515 nonnull_exprlist:
 516         expr_no_commas
 517                 { $$ = build_tree_list (NULL_TREE, $1); }
 518         | nonnull_exprlist ',' expr_no_commas
 519                 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
 520         ;
 521
 522 unary_expr:
 523         primary
 524         | '*' cast_expr   %prec UNARY
 525                 { $$ = build_indirect_ref ($2, "unary *"); }
 526         /* __extension__ turns off -pedantic for following primary.  */
 527         | extension cast_expr     %prec UNARY
 528                 { $$ = $2;
 529                   RESTORE_EXT_FLAGS ($1); }
 530         | unop cast_expr  %prec UNARY
 531                 { $$ = build_unary_op ($1, $2, 0);
 532                   overflow_warning ($$); }
 533         /* Refer to the address of a label as a pointer.  */
 534         | ANDAND identifier
 535                 { $$ = finish_label_address_expr ($2); }
 536         | sizeof unary_expr  %prec UNARY
 537                 { skip_evaluation--;
 538                   if (TREE_CODE ($2) == COMPONENT_REF
 539                       && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
 540                     error ("`sizeof' applied to a bit-field");
 541                   $$ = c_sizeof (TREE_TYPE ($2)); }
 542         | sizeof '(' typename ')'  %prec HYPERUNARY
 543                 { skip_evaluation--;
 544                   $$ = c_sizeof (groktypename ($3)); }
 545         | alignof unary_expr  %prec UNARY
 546                 { skip_evaluation--;
 547                   $$ = c_alignof_expr ($2); }
 548         | alignof '(' typename ')'  %prec HYPERUNARY
 549                 { skip_evaluation--;
 550                   $$ = c_alignof (groktypename ($3)); }
 551         | REALPART cast_expr %prec UNARY
 552                 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
 553         | IMAGPART cast_expr %prec UNARY
 554                 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
 555         ;
 556
 557 sizeof:
 558         SIZEOF { skip_evaluation++; }
 559         ;
 560
 561 alignof:
 562         ALIGNOF { skip_evaluation++; }
 563         ;
 564
 565 typeof:
 566         TYPEOF { skip_evaluation++; }
 567         ;
 568
 569 cast_expr:
 570         unary_expr
 571         | '(' typename ')' cast_expr  %prec UNARY
 572                 { $$ = c_cast_expr ($2, $4); }
 573         ;
 574
 575 expr_no_commas:
 576           cast_expr
 577         | expr_no_commas '+' expr_no_commas
 578                 { $$ = parser_build_binary_op ($2, $1, $3); }
 579         | expr_no_commas '-' expr_no_commas
 580                 { $$ = parser_build_binary_op ($2, $1, $3); }
 581         | expr_no_commas '*' expr_no_commas
 582                 { $$ = parser_build_binary_op ($2, $1, $3); }
 583         | expr_no_commas '/' expr_no_commas
 584                 { $$ = parser_build_binary_op ($2, $1, $3); }
 585         | expr_no_commas '%' expr_no_commas
 586                 { $$ = parser_build_binary_op ($2, $1, $3); }
 587         | expr_no_commas LSHIFT expr_no_commas
 588                 { $$ = parser_build_binary_op ($2, $1, $3); }
 589         | expr_no_commas RSHIFT expr_no_commas
 590                 { $$ = parser_build_binary_op ($2, $1, $3); }
 591         | expr_no_commas ARITHCOMPARE expr_no_commas
 592                 { $$ = parser_build_binary_op ($2, $1, $3); }
 593         | expr_no_commas EQCOMPARE expr_no_commas
 594                 { $$ = parser_build_binary_op ($2, $1, $3); }
 595         | expr_no_commas '&' expr_no_commas
 596                 { $$ = parser_build_binary_op ($2, $1, $3); }
 597         | expr_no_commas '|' expr_no_commas
 598                 { $$ = parser_build_binary_op ($2, $1, $3); }
 599         | expr_no_commas '^' expr_no_commas
 600                 { $$ = parser_build_binary_op ($2, $1, $3); }
 601         | expr_no_commas ANDAND
 602                 { $1 = c_common_truthvalue_conversion
 603                     (default_conversion ($1));
 604                   skip_evaluation += $1 == boolean_false_node; }
 605           expr_no_commas
 606                 { skip_evaluation -= $1 == boolean_false_node;
 607                   $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
 608         | expr_no_commas OROR
 609                 { $1 = c_common_truthvalue_conversion
 610                     (default_conversion ($1));
 611                   skip_evaluation += $1 == boolean_true_node; }
 612           expr_no_commas
 613                 { skip_evaluation -= $1 == boolean_true_node;
 614                   $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
 615         | expr_no_commas '?'
 616                 { $1 = c_common_truthvalue_conversion
 617                     (default_conversion ($1));
 618                   skip_evaluation += $1 == boolean_false_node; }
 619           expr ':'
 620                 { skip_evaluation += (($1 == boolean_true_node)
 621                                       - ($1 == boolean_false_node)); }
 622           expr_no_commas
 623                 { skip_evaluation -= $1 == boolean_true_node;
 624                   $$ = build_conditional_expr ($1, $4, $7); }
 625         | expr_no_commas '?'
 626                 { if (pedantic)
 627                     pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
 628                   /* Make sure first operand is calculated only once.  */
 629                   $<ttype>2 = save_expr ($1);
 630                   $1 = c_common_truthvalue_conversion
 631                     (default_conversion ($<ttype>2));
 632                   skip_evaluation += $1 == boolean_true_node; }
 633           ':' expr_no_commas
 634                 { skip_evaluation -= $1 == boolean_true_node;
 635                   $$ = build_conditional_expr ($1, $<ttype>2, $5); }
 636         | expr_no_commas '=' expr_no_commas
 637                 { char class;
 638                   $$ = build_modify_expr ($1, NOP_EXPR, $3);
 639                   class = TREE_CODE_CLASS (TREE_CODE ($$));
 640                   if (IS_EXPR_CODE_CLASS (class))
 641                     C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
 642                 }
 643         | expr_no_commas ASSIGN expr_no_commas
 644                 { char class;
 645                   $$ = build_modify_expr ($1, $2, $3);
 646                   /* This inhibits warnings in
 647                      c_common_truthvalue_conversion.  */
 648                   class = TREE_CODE_CLASS (TREE_CODE ($$));
 649                   if (IS_EXPR_CODE_CLASS (class))
 650                     C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
 651                 }
 652         ;
 653
 654 primary:
 655         IDENTIFIER
 656                 {
 657                   if (yychar == YYEMPTY)
 658                     yychar = YYLEX;
 659                   $$ = build_external_ref ($1, yychar == '(');
 660                 }
 661         | CONSTANT
 662         | STRING
 663                 { $$ = fix_string_type ($$); }
 664         | VAR_FUNC_NAME
 665                 { $$ = fname_decl (C_RID_CODE ($$), $$); }
 666         | '(' typename ')' '{'
 667                 { start_init (NULL_TREE, NULL, 0);
 668                   $2 = groktypename ($2);
 669                   really_start_incremental_init ($2); }
 670           initlist_maybe_comma '}'  %prec UNARY
 671                 { tree constructor = pop_init_level (0);
 672                   tree type = $2;
 673                   finish_init ();
 674
 675                   if (pedantic && ! flag_isoc99)
 676                     pedwarn ("ISO C89 forbids compound literals");
 677                   $$ = build_compound_literal (type, constructor);
 678                 }
 679         | '(' expr ')'
 680                 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
 681                   if (IS_EXPR_CODE_CLASS (class))
 682                     C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
 683                   $$ = $2; }
 684         | '(' error ')'
 685                 { $$ = error_mark_node; }
 686         | compstmt_primary_start compstmt_nostart ')'
 687                  { tree saved_last_tree;
 688
 689                    if (pedantic)
 690                      pedwarn ("ISO C forbids braced-groups within expressions");
 691                   pop_label_level ();
 692
 693                   saved_last_tree = COMPOUND_BODY ($1);
 694                   RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
 695                   last_tree = saved_last_tree;
 696                   TREE_CHAIN (last_tree) = NULL_TREE;
 697                   if (!last_expr_type)
 698                     last_expr_type = void_type_node;
 699                   $$ = build1 (STMT_EXPR, last_expr_type, $1);
 700                   TREE_SIDE_EFFECTS ($$) = 1;
 701                 }
 702         | compstmt_primary_start error ')'
 703                 {
 704                   pop_label_level ();
 705                   last_tree = COMPOUND_BODY ($1);
 706                   TREE_CHAIN (last_tree) = NULL_TREE;
 707                   $$ = error_mark_node;
 708                 }
 709         | primary '(' exprlist ')'   %prec '.'
 710                 { $$ = build_function_call ($1, $3); }
 711         | VA_ARG '(' expr_no_commas ',' typename ')'
 712                 { $$ = build_va_arg ($3, groktypename ($5)); }
 713
 714       | CHOOSE_EXPR '(' expr_no_commas ',' expr_no_commas ',' expr_no_commas ')'
 715                 {
 716                   tree c;
 717
 718                   c = fold ($3);
 719                   STRIP_NOPS (c);
 720                   if (TREE_CODE (c) != INTEGER_CST)
 721                     error ("first argument to __builtin_choose_expr not a constant");
 722                   $$ = integer_zerop (c) ? $7 : $5;
 723                 }
 724       | TYPES_COMPATIBLE_P '(' typename ',' typename ')'
 725                 {
 726                   tree e1, e2;
 727
 728                   e1 = TYPE_MAIN_VARIANT (groktypename ($3));
 729                   e2 = TYPE_MAIN_VARIANT (groktypename ($5));
 730
 731                   $$ = comptypes (e1, e2)
 732                     ? build_int_2 (1, 0) : build_int_2 (0, 0);
 733                 }
 734         | primary '[' expr ']'   %prec '.'
 735                 { $$ = build_array_ref ($1, $3); }
 736         | primary '.' identifier
 737                 {
 738 ifobjc
 739                     if (!is_public ($1, $3))
 740                       $$ = error_mark_node;
 741                     else
 742 end ifobjc
 743                       $$ = build_component_ref ($1, $3);
 744                 }
 745         | primary POINTSAT identifier
 746                 {
 747                   tree expr = build_indirect_ref ($1, "->");
 748
 749 ifobjc
 750                       if (!is_public (expr, $3))
 751                         $$ = error_mark_node;
 752                       else
 753 end ifobjc
 754                         $$ = build_component_ref (expr, $3);
 755                 }
 756         | primary PLUSPLUS
 757                 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
 758         | primary MINUSMINUS
 759                 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
 760 ifobjc
 761         | objcmessageexpr
 762                 { $$ = build_message_expr ($1); }
 763         | objcselectorexpr
 764                 { $$ = build_selector_expr ($1); }
 765         | objcprotocolexpr
 766                 { $$ = build_protocol_expr ($1); }
 767         | objcencodeexpr
 768                 { $$ = build_encode_expr ($1); }
 769         | objc_string
 770                 { $$ = build_objc_string_object ($1); }
 771 end ifobjc
 772         ;
 773
 774 ifobjc
 775 /* Produces an STRING_CST with perhaps more STRING_CSTs chained
 776    onto it, which is to be read as an ObjC string object.  */
 777 objc_string:
 778           '@' STRING
 779                 { $$ = $2; }
 780         | objc_string '@' STRING
 781                 { $$ = chainon ($1, $3); }
 782         ;
 783 end ifobjc
 784
 785 old_style_parm_decls:
 786         old_style_parm_decls_1
 787         {
 788           parsing_iso_function_signature = false; /* Reset after decls.  */
 789         }
 790         ;
 791
 792 old_style_parm_decls_1:
 793         /* empty */
 794         {
 795           if (warn_traditional && !in_system_header
 796               && parsing_iso_function_signature)
 797             warning ("traditional C rejects ISO C style function definitions");
 798           parsing_iso_function_signature = false; /* Reset after warning.  */
 799         }
 800         | datadecls
 801         ;
 802
 803 /* The following are analogous to lineno_decl, decls and decl
 804    except that they do not allow nested functions.
 805    They are used for old-style parm decls.  */
 806 lineno_datadecl:
 807           save_filename save_lineno datadecl
 808                 { }
 809         ;
 810
 811 datadecls:
 812         lineno_datadecl
 813         | errstmt
 814         | datadecls lineno_datadecl
 815         | lineno_datadecl errstmt
 816         ;
 817
 818 /* We don't allow prefix attributes here because they cause reduce/reduce
 819    conflicts: we can't know whether we're parsing a function decl with
 820    attribute suffix, or function defn with attribute prefix on first old
 821    style parm.  */
 822 datadecl:
 823         declspecs_ts_nosa setspecs initdecls ';'
 824                 { POP_DECLSPEC_STACK; }
 825         | declspecs_nots_nosa setspecs notype_initdecls ';'
 826                 { POP_DECLSPEC_STACK; }
 827         | declspecs_ts_nosa ';'
 828                 { shadow_tag_warned ($1, 1);
 829                   pedwarn ("empty declaration"); }
 830         | declspecs_nots_nosa ';'
 831                 { pedwarn ("empty declaration"); }
 832         ;
 833
 834 /* This combination which saves a lineno before a decl
 835    is the normal thing to use, rather than decl itself.
 836    This is to avoid shift/reduce conflicts in contexts
 837    where statement labels are allowed.  */
 838 lineno_decl:
 839           save_filename save_lineno decl
 840                 { }
 841         ;
 842
 843 /* records the type and storage class specs to use for processing
 844    the declarators that follow.
 845    Maintains a stack of outer-level values of current_declspecs,
 846    for the sake of parm declarations nested in function declarators.  */
 847 setspecs: /* empty */
 848                 { pending_xref_error ();
 849                   PUSH_DECLSPEC_STACK;
 850                   split_specs_attrs ($<ttype>0,
 851                                      &current_declspecs, &prefix_attributes);
 852                   all_prefix_attributes = prefix_attributes; }
 853         ;
 854
 855 /* Possibly attributes after a comma, which should reset all_prefix_attributes
 856    to prefix_attributes with these ones chained on the front.  */
 857 maybe_resetattrs:
 858           maybe_attribute
 859                 { all_prefix_attributes = chainon ($1, prefix_attributes); }
 860         ;
 861
 862 decl:
 863         declspecs_ts setspecs initdecls ';'
 864                 { POP_DECLSPEC_STACK; }
 865         | declspecs_nots setspecs notype_initdecls ';'
 866                 { POP_DECLSPEC_STACK; }
 867         | declspecs_ts setspecs nested_function
 868                 { POP_DECLSPEC_STACK; }
 869         | declspecs_nots setspecs notype_nested_function
 870                 { POP_DECLSPEC_STACK; }
 871         | declspecs ';'
 872                 { shadow_tag ($1); }
 873         | extension decl
 874                 { RESTORE_EXT_FLAGS ($1); }
 875         ;
 876
 877 /* A list of declaration specifiers.  These are:
 878
 879    - Storage class specifiers (scspec), which for GCC currently includes
 880    function specifiers ("inline").
 881
 882    - Type specifiers (typespec_*).
 883
 884    - Type qualifiers (TYPE_QUAL).
 885
 886    - Attribute specifier lists (attributes).
 887
 888    These are stored as a TREE_LIST; the head of the list is the last
 889    item in the specifier list.  Each entry in the list has either a
 890    TREE_PURPOSE that is an attribute specifier list, or a TREE_VALUE that
 891    is a single other specifier or qualifier; and a TREE_CHAIN that is the
 892    rest of the list.  TREE_STATIC is set on the list if something other
 893    than a storage class specifier or attribute has been seen; this is used
 894    to warn for the obsolescent usage of storage class specifiers other than
 895    at the start of the list.  (Doing this properly would require function
 896    specifiers to be handled separately from storage class specifiers.)
 897
 898    The various cases below are classified according to:
 899
 900    (a) Whether a storage class specifier is included or not; some
 901    places in the grammar disallow storage class specifiers (_sc or _nosc).
 902
 903    (b) Whether a type specifier has been seen; after a type specifier,
 904    a typedef name is an identifier to redeclare (_ts or _nots).
 905
 906    (c) Whether the list starts with an attribute; in certain places,
 907    the grammar requires specifiers that don't start with an attribute
 908    (_sa or _nosa).
 909
 910    (d) Whether the list ends with an attribute (or a specifier such that
 911    any following attribute would have been parsed as part of that specifier);
 912    this avoids shift-reduce conflicts in the parsing of attributes
 913    (_ea or _noea).
 914
 915    TODO:
 916
 917    (i) Distinguish between function specifiers and storage class specifiers,
 918    at least for the purpose of warnings about obsolescent usage.
 919
 920    (ii) Halve the number of productions here by eliminating the _sc/_nosc
 921    distinction and instead checking where required that storage class
 922    specifiers aren't present.  */
 923
 924 /* Declspecs which contain at least one type specifier or typedef name.
 925    (Just `const' or `volatile' is not enough.)
 926    A typedef'd name following these is taken as a name to be declared.
 927    Declspecs have a non-NULL TREE_VALUE, attributes do not.  */
 928
 929 declspecs_nosc_nots_nosa_noea:
 930           TYPE_QUAL
 931                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
 932                   TREE_STATIC ($$) = 1; }
 933         | declspecs_nosc_nots_nosa_noea TYPE_QUAL
 934                 { $$ = tree_cons (NULL_TREE, $2, $1);
 935                   TREE_STATIC ($$) = 1; }
 936         | declspecs_nosc_nots_nosa_ea TYPE_QUAL
 937                 { $$ = tree_cons (NULL_TREE, $2, $1);
 938                   TREE_STATIC ($$) = 1; }
 939         ;
 940
 941 declspecs_nosc_nots_nosa_ea:
 942           declspecs_nosc_nots_nosa_noea attributes
 943                 { $$ = tree_cons ($2, NULL_TREE, $1);
 944                   TREE_STATIC ($$) = TREE_STATIC ($1); }
 945         ;
 946
 947 declspecs_nosc_nots_sa_noea:
 948           declspecs_nosc_nots_sa_noea TYPE_QUAL
 949                 { $$ = tree_cons (NULL_TREE, $2, $1);
 950                   TREE_STATIC ($$) = 1; }
 951         | declspecs_nosc_nots_sa_ea TYPE_QUAL
 952                 { $$ = tree_cons (NULL_TREE, $2, $1);
 953                   TREE_STATIC ($$) = 1; }
 954         ;
 955
 956 declspecs_nosc_nots_sa_ea:
 957           attributes
 958                 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE);
 959                   TREE_STATIC ($$) = 0; }
 960         | declspecs_nosc_nots_sa_noea attributes
 961                 { $$ = tree_cons ($2, NULL_TREE, $1);
 962                   TREE_STATIC ($$) = TREE_STATIC ($1); }
 963         ;
 964
 965 declspecs_nosc_ts_nosa_noea:
 966           typespec_nonattr
 967                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
 968                   TREE_STATIC ($$) = 1; }
 969         | declspecs_nosc_ts_nosa_noea TYPE_QUAL
 970                 { $$ = tree_cons (NULL_TREE, $2, $1);
 971                   TREE_STATIC ($$) = 1; }
 972         | declspecs_nosc_ts_nosa_ea TYPE_QUAL
 973                 { $$ = tree_cons (NULL_TREE, $2, $1);
 974                   TREE_STATIC ($$) = 1; }
 975         | declspecs_nosc_ts_nosa_noea typespec_reserved_nonattr
 976                 { $$ = tree_cons (NULL_TREE, $2, $1);
 977                   TREE_STATIC ($$) = 1; }
 978         | declspecs_nosc_ts_nosa_ea typespec_reserved_nonattr
 979                 { $$ = tree_cons (NULL_TREE, $2, $1);
 980                   TREE_STATIC ($$) = 1; }
 981         | declspecs_nosc_nots_nosa_noea typespec_nonattr
 982                 { $$ = tree_cons (NULL_TREE, $2, $1);
 983                   TREE_STATIC ($$) = 1; }
 984         | declspecs_nosc_nots_nosa_ea typespec_nonattr
 985                 { $$ = tree_cons (NULL_TREE, $2, $1);
 986                   TREE_STATIC ($$) = 1; }
 987         ;
 988
 989 declspecs_nosc_ts_nosa_ea:
 990           typespec_attr
 991                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
 992                   TREE_STATIC ($$) = 1; }
 993         | declspecs_nosc_ts_nosa_noea attributes
 994                 { $$ = tree_cons ($2, NULL_TREE, $1);
 995                   TREE_STATIC ($$) = TREE_STATIC ($1); }
 996         | declspecs_nosc_ts_nosa_noea typespec_reserved_attr
 997                 { $$ = tree_cons (NULL_TREE, $2, $1);
 998                   TREE_STATIC ($$) = 1; }
 999         | declspecs_nosc_ts_nosa_ea typespec_reserved_attr
1000                 { $$ = tree_cons (NULL_TREE, $2, $1);
1001                   TREE_STATIC ($$) = 1; }
1002         | declspecs_nosc_nots_nosa_noea typespec_attr
1003                 { $$ = tree_cons (NULL_TREE, $2, $1);
1004                   TREE_STATIC ($$) = 1; }
1005         | declspecs_nosc_nots_nosa_ea typespec_attr
1006                 { $$ = tree_cons (NULL_TREE, $2, $1);
1007                   TREE_STATIC ($$) = 1; }
1008         ;
1009
1010 declspecs_nosc_ts_sa_noea:
1011           declspecs_nosc_ts_sa_noea TYPE_QUAL
1012                 { $$ = tree_cons (NULL_TREE, $2, $1);
1013                   TREE_STATIC ($$) = 1; }
1014         | declspecs_nosc_ts_sa_ea TYPE_QUAL
1015                 { $$ = tree_cons (NULL_TREE, $2, $1);
1016                   TREE_STATIC ($$) = 1; }
1017         | declspecs_nosc_ts_sa_noea typespec_reserved_nonattr
1018                 { $$ = tree_cons (NULL_TREE, $2, $1);
1019                   TREE_STATIC ($$) = 1; }
1020         | declspecs_nosc_ts_sa_ea typespec_reserved_nonattr
1021                 { $$ = tree_cons (NULL_TREE, $2, $1);
1022                   TREE_STATIC ($$) = 1; }
1023         | declspecs_nosc_nots_sa_noea typespec_nonattr
1024                 { $$ = tree_cons (NULL_TREE, $2, $1);
1025                   TREE_STATIC ($$) = 1; }
1026         | declspecs_nosc_nots_sa_ea typespec_nonattr
1027                 { $$ = tree_cons (NULL_TREE, $2, $1);
1028                   TREE_STATIC ($$) = 1; }
1029         ;
1030
1031 declspecs_nosc_ts_sa_ea:
1032           declspecs_nosc_ts_sa_noea attributes
1033                 { $$ = tree_cons ($2, NULL_TREE, $1);
1034                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1035         | declspecs_nosc_ts_sa_noea typespec_reserved_attr
1036                 { $$ = tree_cons (NULL_TREE, $2, $1);
1037                   TREE_STATIC ($$) = 1; }
1038         | declspecs_nosc_ts_sa_ea typespec_reserved_attr
1039                 { $$ = tree_cons (NULL_TREE, $2, $1);
1040                   TREE_STATIC ($$) = 1; }
1041         | declspecs_nosc_nots_sa_noea typespec_attr
1042                 { $$ = tree_cons (NULL_TREE, $2, $1);
1043                   TREE_STATIC ($$) = 1; }
1044         | declspecs_nosc_nots_sa_ea typespec_attr
1045                 { $$ = tree_cons (NULL_TREE, $2, $1);
1046                   TREE_STATIC ($$) = 1; }
1047         ;
1048
1049 declspecs_sc_nots_nosa_noea:
1050           scspec
1051                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1052                   TREE_STATIC ($$) = 0; }
1053         | declspecs_sc_nots_nosa_noea TYPE_QUAL
1054                 { $$ = tree_cons (NULL_TREE, $2, $1);
1055                   TREE_STATIC ($$) = 1; }
1056         | declspecs_sc_nots_nosa_ea TYPE_QUAL
1057                 { $$ = tree_cons (NULL_TREE, $2, $1);
1058                   TREE_STATIC ($$) = 1; }
1059         | declspecs_nosc_nots_nosa_noea scspec
1060                 { if (extra_warnings && TREE_STATIC ($1))
1061                     warning ("`%s' is not at beginning of declaration",
1062                              IDENTIFIER_POINTER ($2));
1063                   $$ = tree_cons (NULL_TREE, $2, $1);
1064                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1065         | declspecs_nosc_nots_nosa_ea scspec
1066                 { if (extra_warnings && TREE_STATIC ($1))
1067                     warning ("`%s' is not at beginning of declaration",
1068                              IDENTIFIER_POINTER ($2));
1069                   $$ = tree_cons (NULL_TREE, $2, $1);
1070                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1071         | declspecs_sc_nots_nosa_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_sc_nots_nosa_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         ;
1084
1085 declspecs_sc_nots_nosa_ea:
1086           declspecs_sc_nots_nosa_noea attributes
1087                 { $$ = tree_cons ($2, NULL_TREE, $1);
1088                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1089         ;
1090
1091 declspecs_sc_nots_sa_noea:
1092           declspecs_sc_nots_sa_noea TYPE_QUAL
1093                 { $$ = tree_cons (NULL_TREE, $2, $1);
1094                   TREE_STATIC ($$) = 1; }
1095         | declspecs_sc_nots_sa_ea TYPE_QUAL
1096                 { $$ = tree_cons (NULL_TREE, $2, $1);
1097                   TREE_STATIC ($$) = 1; }
1098         | declspecs_nosc_nots_sa_noea scspec
1099                 { if (extra_warnings && TREE_STATIC ($1))
1100                     warning ("`%s' is not at beginning of declaration",
1101                              IDENTIFIER_POINTER ($2));
1102                   $$ = tree_cons (NULL_TREE, $2, $1);
1103                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1104         | declspecs_nosc_nots_sa_ea scspec
1105                 { if (extra_warnings && TREE_STATIC ($1))
1106                     warning ("`%s' is not at beginning of declaration",
1107                              IDENTIFIER_POINTER ($2));
1108                   $$ = tree_cons (NULL_TREE, $2, $1);
1109                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1110         | declspecs_sc_nots_sa_noea scspec
1111                 { if (extra_warnings && TREE_STATIC ($1))
1112                     warning ("`%s' is not at beginning of declaration",
1113                              IDENTIFIER_POINTER ($2));
1114                   $$ = tree_cons (NULL_TREE, $2, $1);
1115                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1116         | declspecs_sc_nots_sa_ea scspec
1117                 { if (extra_warnings && TREE_STATIC ($1))
1118                     warning ("`%s' is not at beginning of declaration",
1119                              IDENTIFIER_POINTER ($2));
1120                   $$ = tree_cons (NULL_TREE, $2, $1);
1121                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1122         ;
1123
1124 declspecs_sc_nots_sa_ea:
1125           declspecs_sc_nots_sa_noea attributes
1126                 { $$ = tree_cons ($2, NULL_TREE, $1);
1127                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1128         ;
1129
1130 declspecs_sc_ts_nosa_noea:
1131           declspecs_sc_ts_nosa_noea TYPE_QUAL
1132                 { $$ = tree_cons (NULL_TREE, $2, $1);
1133                   TREE_STATIC ($$) = 1; }
1134         | declspecs_sc_ts_nosa_ea TYPE_QUAL
1135                 { $$ = tree_cons (NULL_TREE, $2, $1);
1136                   TREE_STATIC ($$) = 1; }
1137         | declspecs_sc_ts_nosa_noea typespec_reserved_nonattr
1138                 { $$ = tree_cons (NULL_TREE, $2, $1);
1139                   TREE_STATIC ($$) = 1; }
1140         | declspecs_sc_ts_nosa_ea typespec_reserved_nonattr
1141                 { $$ = tree_cons (NULL_TREE, $2, $1);
1142                   TREE_STATIC ($$) = 1; }
1143         | declspecs_sc_nots_nosa_noea typespec_nonattr
1144                 { $$ = tree_cons (NULL_TREE, $2, $1);
1145                   TREE_STATIC ($$) = 1; }
1146         | declspecs_sc_nots_nosa_ea typespec_nonattr
1147                 { $$ = tree_cons (NULL_TREE, $2, $1);
1148                   TREE_STATIC ($$) = 1; }
1149         | declspecs_nosc_ts_nosa_noea scspec
1150                 { if (extra_warnings && TREE_STATIC ($1))
1151                     warning ("`%s' is not at beginning of declaration",
1152                              IDENTIFIER_POINTER ($2));
1153                   $$ = tree_cons (NULL_TREE, $2, $1);
1154                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1155         | declspecs_nosc_ts_nosa_ea scspec
1156                 { if (extra_warnings && TREE_STATIC ($1))
1157                     warning ("`%s' is not at beginning of declaration",
1158                              IDENTIFIER_POINTER ($2));
1159                   $$ = tree_cons (NULL_TREE, $2, $1);
1160                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1161         | declspecs_sc_ts_nosa_noea scspec
1162                 { if (extra_warnings && TREE_STATIC ($1))
1163                     warning ("`%s' is not at beginning of declaration",
1164                              IDENTIFIER_POINTER ($2));
1165                   $$ = tree_cons (NULL_TREE, $2, $1);
1166                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1167         | declspecs_sc_ts_nosa_ea scspec
1168                 { if (extra_warnings && TREE_STATIC ($1))
1169                     warning ("`%s' is not at beginning of declaration",
1170                              IDENTIFIER_POINTER ($2));
1171                   $$ = tree_cons (NULL_TREE, $2, $1);
1172                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1173         ;
1174
1175 declspecs_sc_ts_nosa_ea:
1176           declspecs_sc_ts_nosa_noea attributes
1177                 { $$ = tree_cons ($2, NULL_TREE, $1);
1178                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1179         | declspecs_sc_ts_nosa_noea typespec_reserved_attr
1180                 { $$ = tree_cons (NULL_TREE, $2, $1);
1181                   TREE_STATIC ($$) = 1; }
1182         | declspecs_sc_ts_nosa_ea typespec_reserved_attr
1183                 { $$ = tree_cons (NULL_TREE, $2, $1);
1184                   TREE_STATIC ($$) = 1; }
1185         | declspecs_sc_nots_nosa_noea typespec_attr
1186                 { $$ = tree_cons (NULL_TREE, $2, $1);
1187                   TREE_STATIC ($$) = 1; }
1188         | declspecs_sc_nots_nosa_ea typespec_attr
1189                 { $$ = tree_cons (NULL_TREE, $2, $1);
1190                   TREE_STATIC ($$) = 1; }
1191         ;
1192
1193 declspecs_sc_ts_sa_noea:
1194           declspecs_sc_ts_sa_noea TYPE_QUAL
1195                 { $$ = tree_cons (NULL_TREE, $2, $1);
1196                   TREE_STATIC ($$) = 1; }
1197         | declspecs_sc_ts_sa_ea TYPE_QUAL
1198                 { $$ = tree_cons (NULL_TREE, $2, $1);
1199                   TREE_STATIC ($$) = 1; }
1200         | declspecs_sc_ts_sa_noea typespec_reserved_nonattr
1201                 { $$ = tree_cons (NULL_TREE, $2, $1);
1202                   TREE_STATIC ($$) = 1; }
1203         | declspecs_sc_ts_sa_ea typespec_reserved_nonattr
1204                 { $$ = tree_cons (NULL_TREE, $2, $1);
1205                   TREE_STATIC ($$) = 1; }
1206         | declspecs_sc_nots_sa_noea typespec_nonattr
1207                 { $$ = tree_cons (NULL_TREE, $2, $1);
1208                   TREE_STATIC ($$) = 1; }
1209         | declspecs_sc_nots_sa_ea typespec_nonattr
1210                 { $$ = tree_cons (NULL_TREE, $2, $1);
1211                   TREE_STATIC ($$) = 1; }
1212         | declspecs_nosc_ts_sa_noea scspec
1213                 { if (extra_warnings && TREE_STATIC ($1))
1214                     warning ("`%s' is not at beginning of declaration",
1215                              IDENTIFIER_POINTER ($2));
1216                   $$ = tree_cons (NULL_TREE, $2, $1);
1217                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1218         | declspecs_nosc_ts_sa_ea scspec
1219                 { if (extra_warnings && TREE_STATIC ($1))
1220                     warning ("`%s' is not at beginning of declaration",
1221                              IDENTIFIER_POINTER ($2));
1222                   $$ = tree_cons (NULL_TREE, $2, $1);
1223                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1224         | declspecs_sc_ts_sa_noea scspec
1225                 { if (extra_warnings && TREE_STATIC ($1))
1226                     warning ("`%s' is not at beginning of declaration",
1227                              IDENTIFIER_POINTER ($2));
1228                   $$ = tree_cons (NULL_TREE, $2, $1);
1229                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1230         | declspecs_sc_ts_sa_ea scspec
1231                 { if (extra_warnings && TREE_STATIC ($1))
1232                     warning ("`%s' is not at beginning of declaration",
1233                              IDENTIFIER_POINTER ($2));
1234                   $$ = tree_cons (NULL_TREE, $2, $1);
1235                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1236         ;
1237
1238 declspecs_sc_ts_sa_ea:
1239           declspecs_sc_ts_sa_noea attributes
1240                 { $$ = tree_cons ($2, NULL_TREE, $1);
1241                   TREE_STATIC ($$) = TREE_STATIC ($1); }
1242         | declspecs_sc_ts_sa_noea typespec_reserved_attr
1243                 { $$ = tree_cons (NULL_TREE, $2, $1);
1244                   TREE_STATIC ($$) = 1; }
1245         | declspecs_sc_ts_sa_ea typespec_reserved_attr
1246                 { $$ = tree_cons (NULL_TREE, $2, $1);
1247                   TREE_STATIC ($$) = 1; }
1248         | declspecs_sc_nots_sa_noea typespec_attr
1249                 { $$ = tree_cons (NULL_TREE, $2, $1);
1250                   TREE_STATIC ($$) = 1; }
1251         | declspecs_sc_nots_sa_ea typespec_attr
1252                 { $$ = tree_cons (NULL_TREE, $2, $1);
1253                   TREE_STATIC ($$) = 1; }
1254         ;
1255
1256 /* Particular useful classes of declspecs.  */
1257 declspecs_ts:
1258           declspecs_nosc_ts_nosa_noea
1259         | declspecs_nosc_ts_nosa_ea
1260         | declspecs_nosc_ts_sa_noea
1261         | declspecs_nosc_ts_sa_ea
1262         | declspecs_sc_ts_nosa_noea
1263         | declspecs_sc_ts_nosa_ea
1264         | declspecs_sc_ts_sa_noea
1265         | declspecs_sc_ts_sa_ea
1266         ;
1267
1268 declspecs_nots:
1269           declspecs_nosc_nots_nosa_noea
1270         | declspecs_nosc_nots_nosa_ea
1271         | declspecs_nosc_nots_sa_noea
1272         | declspecs_nosc_nots_sa_ea
1273         | declspecs_sc_nots_nosa_noea
1274         | declspecs_sc_nots_nosa_ea
1275         | declspecs_sc_nots_sa_noea
1276         | declspecs_sc_nots_sa_ea
1277         ;
1278
1279 declspecs_ts_nosa:
1280           declspecs_nosc_ts_nosa_noea
1281         | declspecs_nosc_ts_nosa_ea
1282         | declspecs_sc_ts_nosa_noea
1283         | declspecs_sc_ts_nosa_ea
1284         ;
1285
1286 declspecs_nots_nosa:
1287           declspecs_nosc_nots_nosa_noea
1288         | declspecs_nosc_nots_nosa_ea
1289         | declspecs_sc_nots_nosa_noea
1290         | declspecs_sc_nots_nosa_ea
1291         ;
1292
1293 declspecs_nosc_ts:
1294           declspecs_nosc_ts_nosa_noea
1295         | declspecs_nosc_ts_nosa_ea
1296         | declspecs_nosc_ts_sa_noea
1297         | declspecs_nosc_ts_sa_ea
1298         ;
1299
1300 declspecs_nosc_nots:
1301           declspecs_nosc_nots_nosa_noea
1302         | declspecs_nosc_nots_nosa_ea
1303         | declspecs_nosc_nots_sa_noea
1304         | declspecs_nosc_nots_sa_ea
1305         ;
1306
1307 declspecs_nosc:
1308           declspecs_nosc_ts_nosa_noea
1309         | declspecs_nosc_ts_nosa_ea
1310         | declspecs_nosc_ts_sa_noea
1311         | declspecs_nosc_ts_sa_ea
1312         | declspecs_nosc_nots_nosa_noea
1313         | declspecs_nosc_nots_nosa_ea
1314         | declspecs_nosc_nots_sa_noea
1315         | declspecs_nosc_nots_sa_ea
1316         ;
1317
1318 declspecs:
1319           declspecs_nosc_nots_nosa_noea
1320         | declspecs_nosc_nots_nosa_ea
1321         | declspecs_nosc_nots_sa_noea
1322         | declspecs_nosc_nots_sa_ea
1323         | declspecs_nosc_ts_nosa_noea
1324         | declspecs_nosc_ts_nosa_ea
1325         | declspecs_nosc_ts_sa_noea
1326         | declspecs_nosc_ts_sa_ea
1327         | declspecs_sc_nots_nosa_noea
1328         | declspecs_sc_nots_nosa_ea
1329         | declspecs_sc_nots_sa_noea
1330         | declspecs_sc_nots_sa_ea
1331         | declspecs_sc_ts_nosa_noea
1332         | declspecs_sc_ts_nosa_ea
1333         | declspecs_sc_ts_sa_noea
1334         | declspecs_sc_ts_sa_ea
1335         ;
1336
1337 /* A (possibly empty) sequence of type qualifiers and attributes.  */
1338 maybe_type_quals_attrs:
1339           /* empty */
1340                 { $$ = NULL_TREE; }
1341         | declspecs_nosc_nots
1342                 { $$ = $1; }
1343         ;
1344
1345 /* A type specifier (but not a type qualifier).
1346    Once we have seen one of these in a declaration,
1347    if a typedef name appears then it is being redeclared.
1348
1349    The _reserved versions start with a reserved word and may appear anywhere
1350    in the declaration specifiers; the _nonreserved versions may only
1351    appear before any other type specifiers, and after that are (if names)
1352    being redeclared.
1353
1354    FIXME: should the _nonreserved version be restricted to names being
1355    redeclared only?  The other entries there relate only the GNU extensions
1356    and Objective C, and are historically parsed thus, and don't make sense
1357    after other type specifiers, but it might be cleaner to count them as
1358    _reserved.
1359
1360    _attr means: specifiers that either end with attributes,
1361    or are such that any following attributes would
1362    be parsed as part of the specifier.
1363
1364    _nonattr: specifiers.  */
1365
1366 typespec_nonattr:
1367           typespec_reserved_nonattr
1368         | typespec_nonreserved_nonattr
1369         ;
1370
1371 typespec_attr:
1372           typespec_reserved_attr
1373         ;
1374
1375 typespec_reserved_nonattr:
1376           TYPESPEC
1377                 { OBJC_NEED_RAW_IDENTIFIER (1); }
1378         | structsp_nonattr
1379         ;
1380
1381 typespec_reserved_attr:
1382           structsp_attr
1383         ;
1384
1385 typespec_nonreserved_nonattr:
1386           TYPENAME
1387                 { /* For a typedef name, record the meaning, not the name.
1388                      In case of `foo foo, bar;'.  */
1389                   $$ = lookup_name ($1); }
1390 ifobjc
1391         | CLASSNAME protocolrefs
1392                 { $$ = get_static_reference ($1, $2); }
1393         | OBJECTNAME protocolrefs
1394                 { $$ = get_object_reference ($2); }
1395
1396 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1397    - nisse@lysator.liu.se */
1398         | non_empty_protocolrefs
1399                 { $$ = get_object_reference ($1); }
1400 end ifobjc
1401         | typeof '(' expr ')'
1402                 { skip_evaluation--; $$ = TREE_TYPE ($3); }
1403         | typeof '(' typename ')'
1404                 { skip_evaluation--; $$ = groktypename ($3); }
1405         ;
1406
1407 /* typespec_nonreserved_attr does not exist.  */
1408
1409 initdecls:
1410         initdcl
1411         | initdecls ',' maybe_resetattrs initdcl
1412         ;
1413
1414 notype_initdecls:
1415         notype_initdcl
1416         | notype_initdecls ',' maybe_resetattrs notype_initdcl
1417         ;
1418
1419 maybeasm:
1420           /* empty */
1421                 { $$ = NULL_TREE; }
1422         | ASM_KEYWORD '(' STRING ')'
1423                 { $$ = $3; }
1424         ;
1425
1426 initdcl:
1427           declarator maybeasm maybe_attribute '='
1428                 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1429                                           chainon ($3, all_prefix_attributes));
1430                   start_init ($<ttype>$, $2, global_bindings_p ()); }
1431           init
1432 /* Note how the declaration of the variable is in effect while its init is parsed! */
1433                 { finish_init ();
1434                   finish_decl ($<ttype>5, $6, $2); }
1435         | declarator maybeasm maybe_attribute
1436                 { tree d = start_decl ($1, current_declspecs, 0,
1437                                        chainon ($3, all_prefix_attributes));
1438                   finish_decl (d, NULL_TREE, $2);
1439                 }
1440         ;
1441
1442 notype_initdcl:
1443           notype_declarator maybeasm maybe_attribute '='
1444                 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1445                                           chainon ($3, all_prefix_attributes));
1446                   start_init ($<ttype>$, $2, global_bindings_p ()); }
1447           init
1448 /* Note how the declaration of the variable is in effect while its init is parsed! */
1449                 { finish_init ();
1450                   finish_decl ($<ttype>5, $6, $2); }
1451         | notype_declarator maybeasm maybe_attribute
1452                 { tree d = start_decl ($1, current_declspecs, 0,
1453                                        chainon ($3, all_prefix_attributes));
1454                   finish_decl (d, NULL_TREE, $2); }
1455         ;
1456 /* the * rules are dummies to accept the Apollo extended syntax
1457    so that the header files compile. */
1458 maybe_attribute:
1459       /* empty */
1460                 { $$ = NULL_TREE; }
1461         | attributes
1462                 { $$ = $1; }
1463         ;
1464
1465 attributes:
1466       attribute
1467                 { $$ = $1; }
1468         | attributes attribute
1469                 { $$ = chainon ($1, $2); }
1470         ;
1471
1472 attribute:
1473       ATTRIBUTE '(' '(' attribute_list ')' ')'
1474                 { $$ = $4; }
1475         ;
1476
1477 attribute_list:
1478       attrib
1479                 { $$ = $1; }
1480         | attribute_list ',' attrib
1481                 { $$ = chainon ($1, $3); }
1482         ;
1483
1484 attrib:
1485     /* empty */
1486                 { $$ = NULL_TREE; }
1487         | any_word
1488                 { $$ = build_tree_list ($1, NULL_TREE); }
1489         | any_word '(' IDENTIFIER ')'
1490                 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1491         | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1492                 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1493         | any_word '(' exprlist ')'
1494                 { $$ = build_tree_list ($1, $3); }
1495         ;
1496
1497 /* This still leaves out most reserved keywords,
1498    shouldn't we include them?  */
1499
1500 any_word:
1501           identifier
1502         | scspec
1503         | TYPESPEC
1504         | TYPE_QUAL
1505         ;
1506
1507 scspec:
1508           STATIC
1509         | SCSPEC
1510         ;
1511 \f
1512 /* Initializers.  `init' is the entry point.  */
1513
1514 init:
1515         expr_no_commas
1516         | '{'
1517                 { really_start_incremental_init (NULL_TREE); }
1518           initlist_maybe_comma '}'
1519                 { $$ = pop_init_level (0); }
1520         | error
1521                 { $$ = error_mark_node; }
1522         ;
1523
1524 /* `initlist_maybe_comma' is the guts of an initializer in braces.  */
1525 initlist_maybe_comma:
1526           /* empty */
1527                 { if (pedantic)
1528                     pedwarn ("ISO C forbids empty initializer braces"); }
1529         | initlist1 maybecomma
1530         ;
1531
1532 initlist1:
1533           initelt
1534         | initlist1 ',' initelt
1535         ;
1536
1537 /* `initelt' is a single element of an initializer.
1538    It may use braces.  */
1539 initelt:
1540           designator_list '=' initval
1541                 { if (pedantic && ! flag_isoc99)
1542                     pedwarn ("ISO C89 forbids specifying subobject to initialize"); }
1543         | designator initval
1544                 { if (pedantic)
1545                     pedwarn ("obsolete use of designated initializer without `='"); }
1546         | identifier ':'
1547                 { set_init_label ($1);
1548                   if (pedantic)
1549                     pedwarn ("obsolete use of designated initializer with `:'"); }
1550           initval
1551                 {}
1552         | initval
1553         ;
1554
1555 initval:
1556           '{'
1557                 { push_init_level (0); }
1558           initlist_maybe_comma '}'
1559                 { process_init_element (pop_init_level (0)); }
1560         | expr_no_commas
1561                 { process_init_element ($1); }
1562         | error
1563         ;
1564
1565 designator_list:
1566           designator
1567         | designator_list designator
1568         ;
1569
1570 designator:
1571           '.' identifier
1572                 { set_init_label ($2); }
1573         | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1574                 { set_init_index ($2, $4);
1575                   if (pedantic)
1576                     pedwarn ("ISO C forbids specifying range of elements to initialize"); }
1577         | '[' expr_no_commas ']'
1578                 { set_init_index ($2, NULL_TREE); }
1579         ;
1580 \f
1581 nested_function:
1582           declarator
1583                 { if (pedantic)
1584                     pedwarn ("ISO C forbids nested functions");
1585
1586                   push_function_context ();
1587                   if (! start_function (current_declspecs, $1,
1588                                         all_prefix_attributes))
1589                     {
1590                       pop_function_context ();
1591                       YYERROR1;
1592                     }
1593                   parsing_iso_function_signature = false; /* Don't warn about nested functions.  */
1594                 }
1595            old_style_parm_decls
1596                 { store_parm_decls (); }
1597 /* This used to use compstmt_or_error.
1598    That caused a bug with input `f(g) int g {}',
1599    where the use of YYERROR1 above caused an error
1600    which then was handled by compstmt_or_error.
1601    There followed a repeated execution of that same rule,
1602    which called YYERROR1 again, and so on.  */
1603           save_filename save_lineno compstmt
1604                 { tree decl = current_function_decl;
1605                   DECL_SOURCE_FILE (decl) = $5;
1606                   DECL_SOURCE_LINE (decl) = $6;
1607                   finish_function (1, 1);
1608                   pop_function_context ();
1609                   add_decl_stmt (decl); }
1610         ;
1611
1612 notype_nested_function:
1613           notype_declarator
1614                 { if (pedantic)
1615                     pedwarn ("ISO C forbids nested functions");
1616
1617                   push_function_context ();
1618                   if (! start_function (current_declspecs, $1,
1619                                         all_prefix_attributes))
1620                     {
1621                       pop_function_context ();
1622                       YYERROR1;
1623                     }
1624                   parsing_iso_function_signature = false; /* Don't warn about nested functions.  */
1625                 }
1626           old_style_parm_decls
1627                 { store_parm_decls (); }
1628 /* This used to use compstmt_or_error.
1629    That caused a bug with input `f(g) int g {}',
1630    where the use of YYERROR1 above caused an error
1631    which then was handled by compstmt_or_error.
1632    There followed a repeated execution of that same rule,
1633    which called YYERROR1 again, and so on.  */
1634           save_filename save_lineno compstmt
1635                 { tree decl = current_function_decl;
1636                   DECL_SOURCE_FILE (decl) = $5;
1637                   DECL_SOURCE_LINE (decl) = $6;
1638                   finish_function (1, 1);
1639                   pop_function_context ();
1640                   add_decl_stmt (decl); }
1641         ;
1642
1643 /* Any kind of declarator (thus, all declarators allowed
1644    after an explicit typespec).  */
1645
1646 declarator:
1647           after_type_declarator
1648         | notype_declarator
1649         ;
1650
1651 /* A declarator that is allowed only after an explicit typespec.  */
1652
1653 after_type_declarator:
1654           '(' maybe_attribute after_type_declarator ')'
1655                 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1656         | after_type_declarator '(' parmlist_or_identifiers  %prec '.'
1657                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1658 /*      | after_type_declarator '(' error ')'  %prec '.'
1659                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1660                   poplevel (0, 0, 0); }  */
1661         | after_type_declarator array_declarator  %prec '.'
1662                 { $$ = set_array_declarator_type ($2, $1, 0); }
1663         | '*' maybe_type_quals_attrs after_type_declarator  %prec UNARY
1664                 { $$ = make_pointer_declarator ($2, $3); }
1665         | TYPENAME
1666 ifobjc
1667         | OBJECTNAME
1668 end ifobjc
1669         ;
1670
1671 /* Kinds of declarator that can appear in a parameter list
1672    in addition to notype_declarator.  This is like after_type_declarator
1673    but does not allow a typedef name in parentheses as an identifier
1674    (because it would conflict with a function with that typedef as arg).  */
1675 parm_declarator:
1676           parm_declarator_starttypename
1677         | parm_declarator_nostarttypename
1678         ;
1679
1680 parm_declarator_starttypename:
1681           parm_declarator_starttypename '(' parmlist_or_identifiers  %prec '.'
1682                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1683 /*      | parm_declarator_starttypename '(' error ')'  %prec '.'
1684                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1685                   poplevel (0, 0, 0); }  */
1686         | parm_declarator_starttypename array_declarator  %prec '.'
1687                 { $$ = set_array_declarator_type ($2, $1, 0); }
1688         | TYPENAME
1689 ifobjc
1690         | OBJECTNAME
1691 end ifobjc
1692         ;
1693
1694 parm_declarator_nostarttypename:
1695           parm_declarator_nostarttypename '(' parmlist_or_identifiers  %prec '.'
1696                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1697 /*      | parm_declarator_nostarttypename '(' error ')'  %prec '.'
1698                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1699                   poplevel (0, 0, 0); }  */
1700         | parm_declarator_nostarttypename array_declarator  %prec '.'
1701                 { $$ = set_array_declarator_type ($2, $1, 0); }
1702         | '*' maybe_type_quals_attrs parm_declarator_starttypename  %prec UNARY
1703                 { $$ = make_pointer_declarator ($2, $3); }
1704         | '*' maybe_type_quals_attrs parm_declarator_nostarttypename  %prec UNARY
1705                 { $$ = make_pointer_declarator ($2, $3); }
1706         | '(' maybe_attribute parm_declarator_nostarttypename ')'
1707                 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1708         ;
1709
1710 /* A declarator allowed whether or not there has been
1711    an explicit typespec.  These cannot redeclare a typedef-name.  */
1712
1713 notype_declarator:
1714           notype_declarator '(' parmlist_or_identifiers  %prec '.'
1715                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1716 /*      | notype_declarator '(' error ')'  %prec '.'
1717                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1718                   poplevel (0, 0, 0); }  */
1719         | '(' maybe_attribute notype_declarator ')'
1720                 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1721         | '*' maybe_type_quals_attrs notype_declarator  %prec UNARY
1722                 { $$ = make_pointer_declarator ($2, $3); }
1723         | notype_declarator array_declarator  %prec '.'
1724                 { $$ = set_array_declarator_type ($2, $1, 0); }
1725         | IDENTIFIER
1726         ;
1727
1728 struct_head:
1729           STRUCT
1730                 { $$ = NULL_TREE; }
1731         | STRUCT attributes
1732                 { $$ = $2; }
1733         ;
1734
1735 union_head:
1736           UNION
1737                 { $$ = NULL_TREE; }
1738         | UNION attributes
1739                 { $$ = $2; }
1740         ;
1741
1742 enum_head:
1743           ENUM
1744                 { $$ = NULL_TREE; }
1745         | ENUM attributes
1746                 { $$ = $2; }
1747         ;
1748
1749 /* structsp_attr: struct/union/enum specifiers that either
1750    end with attributes, or are such that any following attributes would
1751    be parsed as part of the struct/union/enum specifier.
1752
1753    structsp_nonattr: other struct/union/enum specifiers.  */
1754
1755 structsp_attr:
1756           struct_head identifier '{'
1757                 { $$ = start_struct (RECORD_TYPE, $2);
1758                   /* Start scope of tag before parsing components.  */
1759                 }
1760           component_decl_list '}' maybe_attribute
1761                 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1762         | struct_head '{' component_decl_list '}' maybe_attribute
1763                 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1764                                       $3, chainon ($1, $5));
1765                 }
1766         | union_head identifier '{'
1767                 { $$ = start_struct (UNION_TYPE, $2); }
1768           component_decl_list '}' maybe_attribute
1769                 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1770         | union_head '{' component_decl_list '}' maybe_attribute
1771                 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1772                                       $3, chainon ($1, $5));
1773                 }
1774         | enum_head identifier '{'
1775                 { $$ = start_enum ($2); }
1776           enumlist maybecomma_warn '}' maybe_attribute
1777                 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1778                                     chainon ($1, $8)); }
1779         | enum_head '{'
1780                 { $$ = start_enum (NULL_TREE); }
1781           enumlist maybecomma_warn '}' maybe_attribute
1782                 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1783                                     chainon ($1, $7)); }
1784         ;
1785
1786 structsp_nonattr:
1787           struct_head identifier
1788                 { $$ = xref_tag (RECORD_TYPE, $2); }
1789         | union_head identifier
1790                 { $$ = xref_tag (UNION_TYPE, $2); }
1791         | enum_head identifier
1792                 { $$ = xref_tag (ENUMERAL_TYPE, $2);
1793                   /* In ISO C, enumerated types can be referred to
1794                      only if already defined.  */
1795                   if (pedantic && !COMPLETE_TYPE_P ($$))
1796                     pedwarn ("ISO C forbids forward references to `enum' types"); }
1797         ;
1798
1799 maybecomma:
1800           /* empty */
1801         | ','
1802         ;
1803
1804 maybecomma_warn:
1805           /* empty */
1806         | ','
1807                 { if (pedantic && ! flag_isoc99)
1808                     pedwarn ("comma at end of enumerator list"); }
1809         ;
1810
1811 component_decl_list:
1812           component_decl_list2
1813                 { $$ = $1; }
1814         | component_decl_list2 component_decl
1815                 { $$ = chainon ($1, $2);
1816                   pedwarn ("no semicolon at end of struct or union"); }
1817         ;
1818
1819 component_decl_list2:   /* empty */
1820                 { $$ = NULL_TREE; }
1821         | component_decl_list2 component_decl ';'
1822                 { $$ = chainon ($1, $2); }
1823         | component_decl_list2 ';'
1824                 { if (pedantic)
1825                     pedwarn ("extra semicolon in struct or union specified"); }
1826 ifobjc
1827         /* foo(sizeof(struct{ @defs(ClassName)})); */
1828         | DEFS '(' CLASSNAME ')'
1829                 {
1830                   tree interface = lookup_interface ($3);
1831
1832                   if (interface)
1833                     $$ = get_class_ivars (interface);
1834                   else
1835                     {
1836                       error ("cannot find interface declaration for `%s'",
1837                              IDENTIFIER_POINTER ($3));
1838                       $$ = NULL_TREE;
1839                     }
1840                 }
1841 end ifobjc
1842         ;
1843
1844 component_decl:
1845           declspecs_nosc_ts setspecs components
1846                 { $$ = $3;
1847                   POP_DECLSPEC_STACK; }
1848         | declspecs_nosc_ts setspecs save_filename save_lineno
1849                 {
1850                   /* Support for unnamed structs or unions as members of
1851                      structs or unions (which is [a] useful and [b] supports
1852                      MS P-SDK).  */
1853                   if (pedantic)
1854                     pedwarn ("ISO C doesn't support unnamed structs/unions");
1855
1856                   $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1857                   POP_DECLSPEC_STACK; }
1858         | declspecs_nosc_nots setspecs components_notype
1859                 { $$ = $3;
1860                   POP_DECLSPEC_STACK; }
1861         | declspecs_nosc_nots
1862                 { if (pedantic)
1863                     pedwarn ("ISO C forbids member declarations with no members");
1864                   shadow_tag($1);
1865                   $$ = NULL_TREE; }
1866         | error
1867                 { $$ = NULL_TREE; }
1868         | extension component_decl
1869                 { $$ = $2;
1870                   RESTORE_EXT_FLAGS ($1); }
1871         ;
1872
1873 components:
1874           component_declarator
1875         | components ',' maybe_resetattrs component_declarator
1876                 { $$ = chainon ($1, $4); }
1877         ;
1878
1879 components_notype:
1880           component_notype_declarator
1881         | components_notype ',' maybe_resetattrs component_notype_declarator
1882                 { $$ = chainon ($1, $4); }
1883         ;
1884
1885 component_declarator:
1886           save_filename save_lineno declarator maybe_attribute
1887                 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1888                   decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
1889         | save_filename save_lineno
1890           declarator ':' expr_no_commas maybe_attribute
1891                 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1892                   decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
1893         | save_filename save_lineno ':' expr_no_commas maybe_attribute
1894                 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1895                   decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
1896         ;
1897
1898 component_notype_declarator:
1899           save_filename save_lineno notype_declarator maybe_attribute
1900                 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1901                   decl_attributes (&$$, chainon ($4, all_prefix_attributes), 0); }
1902         | save_filename save_lineno
1903           notype_declarator ':' expr_no_commas maybe_attribute
1904                 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1905                   decl_attributes (&$$, chainon ($6, all_prefix_attributes), 0); }
1906         | save_filename save_lineno ':' expr_no_commas maybe_attribute
1907                 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1908                   decl_attributes (&$$, chainon ($5, all_prefix_attributes), 0); }
1909         ;
1910
1911 /* We chain the enumerators in reverse order.
1912    They are put in forward order where enumlist is used.
1913    (The order used to be significant, but no longer is so.
1914    However, we still maintain the order, just to be clean.)  */
1915
1916 enumlist:
1917           enumerator
1918         | enumlist ',' enumerator
1919                 { if ($1 == error_mark_node)
1920                     $$ = $1;
1921                   else
1922                     $$ = chainon ($3, $1); }
1923         | error
1924                 { $$ = error_mark_node; }
1925         ;
1926
1927
1928 enumerator:
1929           identifier
1930                 { $$ = build_enumerator ($1, NULL_TREE); }
1931         | identifier '=' expr_no_commas
1932                 { $$ = build_enumerator ($1, $3); }
1933         ;
1934
1935 typename:
1936           declspecs_nosc
1937                 { pending_xref_error ();
1938                   $<ttype>$ = $1; }
1939           absdcl
1940                 { $$ = build_tree_list ($<ttype>2, $3); }
1941         ;
1942
1943 absdcl:   /* an absolute declarator */
1944         /* empty */
1945                 { $$ = NULL_TREE; }
1946         | absdcl1
1947         ;
1948
1949 absdcl_maybe_attribute:   /* absdcl maybe_attribute, but not just attributes */
1950         /* empty */
1951                 { $$ = build_tree_list (build_tree_list (current_declspecs,
1952                                                          NULL_TREE),
1953                                         all_prefix_attributes); }
1954         | absdcl1
1955                 { $$ = build_tree_list (build_tree_list (current_declspecs,
1956                                                          $1),
1957                                         all_prefix_attributes); }
1958         | absdcl1_noea attributes
1959                 { $$ = build_tree_list (build_tree_list (current_declspecs,
1960                                                          $1),
1961                                         chainon ($2, all_prefix_attributes)); }
1962         ;
1963
1964 absdcl1:  /* a nonempty absolute declarator */
1965           absdcl1_ea
1966         | absdcl1_noea
1967         ;
1968
1969 absdcl1_noea:
1970           direct_absdcl1
1971         | '*' maybe_type_quals_attrs absdcl1_noea
1972                 { $$ = make_pointer_declarator ($2, $3); }
1973         ;
1974
1975 absdcl1_ea:
1976           '*' maybe_type_quals_attrs
1977                 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1978         | '*' maybe_type_quals_attrs absdcl1_ea
1979                 { $$ = make_pointer_declarator ($2, $3); }
1980         ;
1981
1982 direct_absdcl1:
1983           '(' maybe_attribute absdcl1 ')'
1984                 { $$ = $2 ? tree_cons ($2, $3, NULL_TREE) : $3; }
1985         | direct_absdcl1 '(' parmlist
1986                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1987         | direct_absdcl1 array_declarator
1988                 { $$ = set_array_declarator_type ($2, $1, 1); }
1989         | '(' parmlist
1990                 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1991         | array_declarator
1992                 { $$ = set_array_declarator_type ($1, NULL_TREE, 1); }
1993         ;
1994
1995 /* The [...] part of a declarator for an array type.  */
1996
1997 array_declarator:
1998         '[' maybe_type_quals_attrs expr ']'
1999                 { $$ = build_array_declarator ($3, $2, 0, 0); }
2000         | '[' maybe_type_quals_attrs ']'
2001                 { $$ = build_array_declarator (NULL_TREE, $2, 0, 0); }
2002         | '[' maybe_type_quals_attrs '*' ']'
2003                 { $$ = build_array_declarator (NULL_TREE, $2, 0, 1); }
2004         | '[' STATIC maybe_type_quals_attrs expr ']'
2005                 { $$ = build_array_declarator ($4, $3, 1, 0); }
2006         /* declspecs_nosc_nots is a synonym for type_quals_attrs.  */
2007         | '[' declspecs_nosc_nots STATIC expr ']'
2008                 { $$ = build_array_declarator ($4, $2, 1, 0); }
2009         ;
2010
2011 /* A nonempty series of declarations and statements (possibly followed by
2012    some labels) that can form the body of a compound statement.
2013    NOTE: we don't allow labels on declarations; this might seem like a
2014    natural extension, but there would be a conflict between attributes
2015    on the label and prefix attributes on the declaration.  */
2016
2017 stmts_and_decls:
2018           lineno_stmt_decl_or_labels_ending_stmt
2019         | lineno_stmt_decl_or_labels_ending_decl
2020         | lineno_stmt_decl_or_labels_ending_label
2021                 {
2022                   pedwarn ("deprecated use of label at end of compound statement");
2023                 }
2024         | lineno_stmt_decl_or_labels_ending_error
2025         ;
2026
2027 lineno_stmt_decl_or_labels_ending_stmt:
2028           lineno_stmt
2029         | lineno_stmt_decl_or_labels_ending_stmt lineno_stmt
2030         | lineno_stmt_decl_or_labels_ending_decl lineno_stmt
2031         | lineno_stmt_decl_or_labels_ending_label lineno_stmt
2032         | lineno_stmt_decl_or_labels_ending_error lineno_stmt
2033         ;
2034
2035 lineno_stmt_decl_or_labels_ending_decl:
2036           lineno_decl
2037         | lineno_stmt_decl_or_labels_ending_stmt lineno_decl
2038                 { if (pedantic && !flag_isoc99)
2039                     pedwarn ("ISO C89 forbids mixed declarations and code"); }
2040         | lineno_stmt_decl_or_labels_ending_decl lineno_decl
2041         | lineno_stmt_decl_or_labels_ending_error lineno_decl
2042         ;
2043
2044 lineno_stmt_decl_or_labels_ending_label:
2045           lineno_label
2046         | lineno_stmt_decl_or_labels_ending_stmt lineno_label
2047         | lineno_stmt_decl_or_labels_ending_decl lineno_label
2048         | lineno_stmt_decl_or_labels_ending_label lineno_label
2049         | lineno_stmt_decl_or_labels_ending_error lineno_label
2050         ;
2051
2052 lineno_stmt_decl_or_labels_ending_error:
2053         errstmt
2054         | lineno_stmt_decl_or_labels errstmt
2055         ;
2056
2057 lineno_stmt_decl_or_labels:
2058           lineno_stmt_decl_or_labels_ending_stmt
2059         | lineno_stmt_decl_or_labels_ending_decl
2060         | lineno_stmt_decl_or_labels_ending_label
2061         | lineno_stmt_decl_or_labels_ending_error
2062         ;
2063
2064 errstmt:  error ';'
2065         ;
2066
2067 pushlevel:  /* empty */
2068                 { pushlevel (0);
2069                   clear_last_expr ();
2070                   add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2071 ifobjc
2072                   if (objc_method_context)
2073                     add_objc_decls ();
2074 end ifobjc
2075                 }
2076         ;
2077
2078 poplevel:  /* empty */
2079                 { $$ = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); }
2080         ;
2081
2082 /* Start and end blocks created for the new scopes of C99.  */
2083 c99_block_start: /* empty */
2084                 { if (flag_isoc99)
2085                     {
2086                       $$ = c_begin_compound_stmt ();
2087                       pushlevel (0);
2088                       clear_last_expr ();
2089                       add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
2090 ifobjc
2091                       if (objc_method_context)
2092                         add_objc_decls ();
2093 end ifobjc
2094                     }
2095                   else
2096                     $$ = NULL_TREE;
2097                 }
2098         ;
2099
2100 /* Productions using c99_block_start and c99_block_end will need to do what's
2101    in compstmt: RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); $$ = $2; where
2102    $1 is the value of c99_block_start and $2 of c99_block_end.  */
2103 c99_block_end: /* empty */
2104                 { if (flag_isoc99)
2105                     {
2106                       tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
2107                       $$ = poplevel (kept_level_p (), 0, 0);
2108                       SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
2109                         = SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
2110                         = $$;
2111                     }
2112                   else
2113                     $$ = NULL_TREE; }
2114         ;
2115
2116 /* Read zero or more forward-declarations for labels
2117    that nested functions can jump to.  */
2118 maybe_label_decls:
2119           /* empty */
2120         | label_decls
2121                 { if (pedantic)
2122                     pedwarn ("ISO C forbids label declarations"); }
2123         ;
2124
2125 label_decls:
2126           label_decl
2127         | label_decls label_decl
2128         ;
2129
2130 label_decl:
2131           LABEL identifiers_or_typenames ';'
2132                 { tree link;
2133                   for (link = $2; link; link = TREE_CHAIN (link))
2134                     {
2135                       tree label = shadow_label (TREE_VALUE (link));
2136                       C_DECLARED_LABEL_FLAG (label) = 1;
2137                       add_decl_stmt (label);
2138                     }
2139                 }
2140         ;
2141
2142 /* This is the body of a function definition.
2143    It causes syntax errors to ignore to the next openbrace.  */
2144 compstmt_or_error:
2145           compstmt
2146                 {}
2147         | error compstmt
2148         ;
2149
2150 compstmt_start: '{' { compstmt_count++;
2151                       $$ = c_begin_compound_stmt (); }
2152         ;
2153
2154 compstmt_nostart: '}'
2155                 { $$ = convert (void_type_node, integer_zero_node); }
2156         | pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
2157                 { $$ = poplevel (kept_level_p (), 1, 0);
2158                   SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
2159                     = SCOPE_STMT_BLOCK (TREE_VALUE ($5))
2160                     = $$; }
2161         ;
2162
2163 compstmt_contents_nonempty:
2164           stmts_and_decls
2165         | error
2166         ;
2167
2168 compstmt_primary_start:
2169         '(' '{'
2170                 { if (current_function_decl == 0)
2171                     {
2172                       error ("braced-group within expression allowed only inside a function");
2173                       YYERROR;
2174                     }
2175                   /* We must force a BLOCK for this level
2176                      so that, if it is not expanded later,
2177                      there is a way to turn off the entire subtree of blocks
2178                      that are contained in it.  */
2179                   keep_next_level ();
2180                   push_label_level ();
2181                   compstmt_count++;
2182                   $$ = add_stmt (build_stmt (COMPOUND_STMT, last_tree));
2183                 }
2184         ;
2185
2186 compstmt: compstmt_start compstmt_nostart
2187                 { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2188                   last_expr_type = NULL_TREE;
2189                   $$ = $1; }
2190         ;
2191
2192 /* Value is number of statements counted as of the closeparen.  */
2193 simple_if:
2194           if_prefix c99_block_lineno_labeled_stmt
2195                 { c_finish_then (); }
2196 /* Make sure c_expand_end_cond is run once
2197    for each call to c_expand_start_cond.
2198    Otherwise a crash is likely.  */
2199         | if_prefix error
2200         ;
2201
2202 if_prefix:
2203           /* We must build the IF_STMT node before parsing its
2204              condition so that STMT_LINENO refers to the line
2205              containing the "if", and not the line containing
2206              the close-parenthesis.
2207
2208              c_begin_if_stmt returns the IF_STMT node, which
2209              we later pass to c_expand_start_cond to fill
2210              in the condition and other tidbits.  */
2211           IF
2212                 { $<ttype>$ = c_begin_if_stmt (); }
2213             '(' expr ')'
2214                 { c_expand_start_cond (c_common_truthvalue_conversion ($4),
2215                                        compstmt_count,$<ttype>2);
2216                   $<itype>$ = stmt_count;
2217                   if_stmt_file = $<filename>-2;
2218                   if_stmt_line = $<lineno>-1; }
2219         ;
2220
2221 /* This is a subroutine of stmt.
2222    It is used twice, once for valid DO statements
2223    and once for catching errors in parsing the end test.  */
2224 do_stmt_start:
2225           DO
2226                 { stmt_count++;
2227                   compstmt_count++;
2228                   $<ttype>$
2229                     = add_stmt (build_stmt (DO_STMT, NULL_TREE,
2230                                             NULL_TREE));
2231                   /* In the event that a parse error prevents
2232                      parsing the complete do-statement, set the
2233                      condition now.  Otherwise, we can get crashes at
2234                      RTL-generation time.  */
2235                   DO_COND ($<ttype>$) = error_mark_node; }
2236           c99_block_lineno_labeled_stmt WHILE
2237                 { $$ = $<ttype>2;
2238                   RECHAIN_STMTS ($$, DO_BODY ($$)); }
2239         ;
2240
2241 /* The forced readahead in here is because we might be at the end of a
2242    line, and the line and file won't be bumped until yylex absorbs the
2243    first token on the next line.  */
2244 save_filename:
2245                 { if (yychar == YYEMPTY)
2246                     yychar = YYLEX;
2247                   $$ = input_filename; }
2248         ;
2249
2250 save_lineno:
2251                 { if (yychar == YYEMPTY)
2252                     yychar = YYLEX;
2253                   $$ = lineno; }
2254         ;
2255
2256 lineno_labeled_stmt:
2257           lineno_stmt
2258         | lineno_label lineno_labeled_stmt
2259         ;
2260
2261 /* Like lineno_labeled_stmt, but a block in C99.  */
2262 c99_block_lineno_labeled_stmt:
2263           c99_block_start lineno_labeled_stmt c99_block_end
2264                 { if (flag_isoc99)
2265                     RECHAIN_STMTS ($1, COMPOUND_BODY ($1)); }
2266         ;
2267
2268 lineno_stmt:
2269           save_filename save_lineno stmt
2270                 { if ($3)
2271                     {
2272                       STMT_LINENO ($3) = $2;
2273                       /* ??? We currently have no way of recording
2274                          the filename for a statement.  This probably
2275                          matters little in practice at the moment,
2276                          but I suspect that problems will occur when
2277                          doing inlining at the tree level.  */
2278                     }
2279                 }
2280         ;
2281
2282 lineno_label:
2283           save_filename save_lineno label
2284                 { if ($3)
2285                     {
2286                       STMT_LINENO ($3) = $2;
2287                     }
2288                 }
2289         ;
2290
2291 select_or_iter_stmt:
2292           simple_if ELSE
2293                 { c_expand_start_else ();
2294                   $<itype>1 = stmt_count; }
2295           c99_block_lineno_labeled_stmt
2296                 { c_finish_else ();
2297                   c_expand_end_cond ();
2298                   if (extra_warnings && stmt_count == $<itype>1)
2299                     warning ("empty body in an else-statement"); }
2300         | simple_if %prec IF
2301                 { c_expand_end_cond ();
2302                   /* This warning is here instead of in simple_if, because we
2303                      do not want a warning if an empty if is followed by an
2304                      else statement.  Increment stmt_count so we don't
2305                      give a second error if this is a nested `if'.  */
2306                   if (extra_warnings && stmt_count++ == $<itype>1)
2307                     warning_with_file_and_line (if_stmt_file, if_stmt_line,
2308                                                 "empty body in an if-statement"); }
2309 /* Make sure c_expand_end_cond is run once
2310    for each call to c_expand_start_cond.
2311    Otherwise a crash is likely.  */
2312         | simple_if ELSE error
2313                 { c_expand_end_cond (); }
2314        /* We must build the WHILE_STMT node before parsing its
2315           condition so that STMT_LINENO refers to the line
2316           containing the "while", and not the line containing
2317           the close-parenthesis.
2318
2319           c_begin_while_stmt returns the WHILE_STMT node, which
2320           we later pass to c_finish_while_stmt_cond to fill
2321           in the condition and other tidbits.  */
2322         | WHILE
2323                 { stmt_count++;
2324                   $<ttype>$ = c_begin_while_stmt (); }
2325           '(' expr ')'
2326                 { $4 = c_common_truthvalue_conversion ($4);
2327                   c_finish_while_stmt_cond
2328                     (c_common_truthvalue_conversion ($4), $<ttype>2);
2329                   $<ttype>$ = add_stmt ($<ttype>2); }
2330           c99_block_lineno_labeled_stmt
2331                 { RECHAIN_STMTS ($<ttype>6, WHILE_BODY ($<ttype>6)); }
2332         | do_stmt_start
2333           '(' expr ')' ';'
2334                 { DO_COND ($1) = c_common_truthvalue_conversion ($3); }
2335         | do_stmt_start error
2336                 { }
2337         | FOR
2338                 { $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
2339                                           NULL_TREE, NULL_TREE);
2340                   add_stmt ($<ttype>$); }
2341           '(' for_init_stmt
2342                 { stmt_count++;
2343                   RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
2344           xexpr ';'
2345                 { if ($6)
2346                     FOR_COND ($<ttype>2)
2347                       = c_common_truthvalue_conversion ($6); }
2348           xexpr ')'
2349                 { FOR_EXPR ($<ttype>2) = $9; }
2350           c99_block_lineno_labeled_stmt
2351                 { RECHAIN_STMTS ($<ttype>2, FOR_BODY ($<ttype>2)); }
2352         | SWITCH '(' expr ')'
2353                 { stmt_count++;
2354                   $<ttype>$ = c_start_case ($3); }
2355           c99_block_lineno_labeled_stmt
2356                 { c_finish_case (); }
2357         ;
2358
2359 for_init_stmt:
2360           xexpr ';'
2361                 { add_stmt (build_stmt (EXPR_STMT, $1)); }
2362         | decl
2363                 { check_for_loop_decls (); }
2364         ;
2365
2366 /* Parse a single real statement, not including any labels.  */
2367 stmt:
2368           compstmt
2369                 { stmt_count++; $$ = $1; }
2370         | expr ';'
2371                 { stmt_count++;
2372                   $$ = c_expand_expr_stmt ($1); }
2373         | c99_block_start select_or_iter_stmt c99_block_end
2374                 { if (flag_isoc99)
2375                     RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
2376                   $$ = NULL_TREE; }
2377         | BREAK ';'
2378                 { stmt_count++;
2379                   $$ = add_stmt (build_break_stmt ()); }
2380         | CONTINUE ';'
2381                 { stmt_count++;
2382                   $$ = add_stmt (build_continue_stmt ()); }
2383         | RETURN ';'
2384                 { stmt_count++;
2385                   $$ = c_expand_return (NULL_TREE); }
2386         | RETURN expr ';'
2387                 { stmt_count++;
2388                   $$ = c_expand_return ($2); }
2389         | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2390                 { stmt_count++;
2391                   $$ = simple_asm_stmt ($4); }
2392         /* This is the case with just output operands.  */
2393         | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2394                 { stmt_count++;
2395                   $$ = build_asm_stmt ($2, $4, $6, NULL_TREE, NULL_TREE); }
2396         /* This is the case with input operands as well.  */
2397         | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2398           asm_operands ')' ';'
2399                 { stmt_count++;
2400                   $$ = build_asm_stmt ($2, $4, $6, $8, NULL_TREE); }
2401         /* This is the case with clobbered registers as well.  */
2402         | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2403           asm_operands ':' asm_clobbers ')' ';'
2404                 { stmt_count++;
2405                   $$ = build_asm_stmt ($2, $4, $6, $8, $10); }
2406         | GOTO identifier ';'
2407                 { tree decl;
2408                   stmt_count++;
2409                   decl = lookup_label ($2);
2410                   if (decl != 0)
2411                     {
2412                       TREE_USED (decl) = 1;
2413                       $$ = add_stmt (build_stmt (GOTO_STMT, decl));
2414                     }
2415                   else
2416                     $$ = NULL_TREE;
2417                 }
2418         | GOTO '*' expr ';'
2419                 { if (pedantic)
2420                     pedwarn ("ISO C forbids `goto *expr;'");
2421                   stmt_count++;
2422                   $3 = convert (ptr_type_node, $3);
2423                   $$ = add_stmt (build_stmt (GOTO_STMT, $3)); }
2424         | ';'
2425                 { $$ = NULL_TREE; }
2426         ;
2427
2428 /* Any kind of label, including jump labels and case labels.
2429    ANSI C accepts labels only before statements, but we allow them
2430    also at the end of a compound statement.  */
2431
2432 label:    CASE expr_no_commas ':'
2433                 { stmt_count++;
2434                   $$ = do_case ($2, NULL_TREE); }
2435         | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2436                 { stmt_count++;
2437                   $$ = do_case ($2, $4); }
2438         | DEFAULT ':'
2439                 { stmt_count++;
2440                   $$ = do_case (NULL_TREE, NULL_TREE); }
2441         | identifier save_filename save_lineno ':' maybe_attribute
2442                 { tree label = define_label ($2, $3, $1);
2443                   stmt_count++;
2444                   if (label)
2445                     {
2446                       decl_attributes (&label, $5, 0);
2447                       $$ = add_stmt (build_stmt (LABEL_STMT, label));
2448                     }
2449                   else
2450                     $$ = NULL_TREE;
2451                 }
2452         ;
2453
2454 /* Either a type-qualifier or nothing.  First thing in an `asm' statement.  */
2455
2456 maybe_type_qual:
2457         /* empty */
2458                 { emit_line_note (input_filename, lineno);
2459                   $$ = NULL_TREE; }
2460         | TYPE_QUAL
2461                 { emit_line_note (input_filename, lineno); }
2462         ;
2463
2464 xexpr:
2465         /* empty */
2466                 { $$ = NULL_TREE; }
2467         | expr
2468         ;
2469
2470 /* These are the operands other than the first string and colon
2471    in  asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x))  */
2472 asm_operands: /* empty */
2473                 { $$ = NULL_TREE; }
2474         | nonnull_asm_operands
2475         ;
2476
2477 nonnull_asm_operands:
2478           asm_operand
2479         | nonnull_asm_operands ',' asm_operand
2480                 { $$ = chainon ($1, $3); }
2481         ;
2482
2483 asm_operand:
2484           STRING '(' expr ')'
2485                 { $$ = build_tree_list (build_tree_list (NULL_TREE, $1), $3); }
2486         | '[' identifier ']' STRING '(' expr ')'
2487                 { $2 = build_string (IDENTIFIER_LENGTH ($2),
2488                                      IDENTIFIER_POINTER ($2));
2489                   $$ = build_tree_list (build_tree_list ($2, $4), $6); }
2490         ;
2491
2492 asm_clobbers:
2493           STRING
2494                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
2495         | asm_clobbers ',' STRING
2496                 { $$ = tree_cons (NULL_TREE, $3, $1); }
2497         ;
2498 \f
2499 /* This is what appears inside the parens in a function declarator.
2500    Its value is a list of ..._TYPE nodes.  Attributes must appear here
2501    to avoid a conflict with their appearance after an open parenthesis
2502    in an abstract declarator, as in
2503    "void bar (int (__attribute__((__mode__(SI))) int foo));".  */
2504 parmlist:
2505           maybe_attribute
2506                 { pushlevel (0);
2507                   clear_parm_order ();
2508                   declare_parm_level (0); }
2509           parmlist_1
2510                 { $$ = $3;
2511                   parmlist_tags_warning ();
2512                   poplevel (0, 0, 0); }
2513         ;
2514
2515 parmlist_1:
2516           parmlist_2 ')'
2517         | parms ';'
2518                 { tree parm;
2519                   if (pedantic)
2520                     pedwarn ("ISO C forbids forward parameter declarations");
2521                   /* Mark the forward decls as such.  */
2522                   for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2523                     TREE_ASM_WRITTEN (parm) = 1;
2524                   clear_parm_order (); }
2525           maybe_attribute
2526                 { /* Dummy action so attributes are in known place
2527                      on parser stack.  */ }
2528           parmlist_1
2529                 { $$ = $6; }
2530         | error ')'
2531                 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2532         ;
2533
2534 /* This is what appears inside the parens in a function declarator.
2535    Is value is represented in the format that grokdeclarator expects.  */
2536 parmlist_2:  /* empty */
2537                 { $$ = get_parm_info (0); }
2538         | ELLIPSIS
2539                 { $$ = get_parm_info (0);
2540                   /* Gcc used to allow this as an extension.  However, it does
2541                      not work for all targets, and thus has been disabled.
2542                      Also, since func (...) and func () are indistinguishable,
2543                      it caused problems with the code in expand_builtin which
2544                      tries to verify that BUILT_IN_NEXT_ARG is being used
2545                      correctly.  */
2546                   error ("ISO C requires a named argument before `...'");
2547                 }
2548         | parms
2549                 { $$ = get_parm_info (1);
2550                   parsing_iso_function_signature = true;
2551                 }
2552         | parms ',' ELLIPSIS
2553                 { $$ = get_parm_info (0); }
2554         ;
2555
2556 parms:
2557         firstparm
2558                 { push_parm_decl ($1); }
2559         | parms ',' parm
2560                 { push_parm_decl ($3); }
2561         ;
2562
2563 /* A single parameter declaration or parameter type name,
2564    as found in a parmlist.  */
2565 parm:
2566           declspecs_ts setspecs parm_declarator maybe_attribute
2567                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2568                                                          $3),
2569                                         chainon ($4, all_prefix_attributes));
2570                   POP_DECLSPEC_STACK; }
2571         | declspecs_ts setspecs notype_declarator maybe_attribute
2572                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2573                                                          $3),
2574                                         chainon ($4, all_prefix_attributes));
2575                   POP_DECLSPEC_STACK; }
2576         | declspecs_ts setspecs absdcl_maybe_attribute
2577                 { $$ = $3;
2578                   POP_DECLSPEC_STACK; }
2579         | declspecs_nots setspecs notype_declarator maybe_attribute
2580                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2581                                                          $3),
2582                                         chainon ($4, all_prefix_attributes));
2583                   POP_DECLSPEC_STACK; }
2584
2585         | declspecs_nots setspecs absdcl_maybe_attribute
2586                 { $$ = $3;
2587                   POP_DECLSPEC_STACK; }
2588         ;
2589
2590 /* The first parm, which must suck attributes from off the top of the parser
2591    stack.  */
2592 firstparm:
2593           declspecs_ts_nosa setspecs_fp parm_declarator maybe_attribute
2594                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2595                                                          $3),
2596                                         chainon ($4, all_prefix_attributes));
2597                   POP_DECLSPEC_STACK; }
2598         | declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
2599                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2600                                                          $3),
2601                                         chainon ($4, all_prefix_attributes));
2602                   POP_DECLSPEC_STACK; }
2603         | declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
2604                 { $$ = $3;
2605                   POP_DECLSPEC_STACK; }
2606         | declspecs_nots_nosa setspecs_fp notype_declarator maybe_attribute
2607                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2608                                                          $3),
2609                                         chainon ($4, all_prefix_attributes));
2610                   POP_DECLSPEC_STACK; }
2611
2612         | declspecs_nots_nosa setspecs_fp absdcl_maybe_attribute
2613                 { $$ = $3;
2614                   POP_DECLSPEC_STACK; }
2615         ;
2616
2617 setspecs_fp:
2618           setspecs
2619                 { prefix_attributes = chainon (prefix_attributes, $<ttype>-2);
2620                   all_prefix_attributes = prefix_attributes; }
2621         ;
2622
2623 /* This is used in a function definition
2624    where either a parmlist or an identifier list is ok.
2625    Its value is a list of ..._TYPE nodes or a list of identifiers.  */
2626 parmlist_or_identifiers:
2627           maybe_attribute
2628                 { pushlevel (0);
2629                   clear_parm_order ();
2630                   declare_parm_level (1); }
2631           parmlist_or_identifiers_1
2632                 { $$ = $3;
2633                   parmlist_tags_warning ();
2634                   poplevel (0, 0, 0); }
2635         ;
2636
2637 parmlist_or_identifiers_1:
2638           parmlist_1
2639         | identifiers ')'
2640                 { tree t;
2641                   for (t = $1; t; t = TREE_CHAIN (t))
2642                     if (TREE_VALUE (t) == NULL_TREE)
2643                       error ("`...' in old-style identifier list");
2644                   $$ = tree_cons (NULL_TREE, NULL_TREE, $1);
2645
2646                   /* Make sure we have a parmlist after attributes.  */
2647                   if ($<ttype>-1 != 0
2648                       && (TREE_CODE ($$) != TREE_LIST
2649                           || TREE_PURPOSE ($$) == 0
2650                           || TREE_CODE (TREE_PURPOSE ($$)) != PARM_DECL))
2651                     YYERROR1;
2652                 }
2653         ;
2654
2655 /* A nonempty list of identifiers.  */
2656 identifiers:
2657         IDENTIFIER
2658                 { $$ = build_tree_list (NULL_TREE, $1); }
2659         | identifiers ',' IDENTIFIER
2660                 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2661         ;
2662
2663 /* A nonempty list of identifiers, including typenames.  */
2664 identifiers_or_typenames:
2665         identifier
2666                 { $$ = build_tree_list (NULL_TREE, $1); }
2667         | identifiers_or_typenames ',' identifier
2668                 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2669         ;
2670
2671 extension:
2672         EXTENSION
2673                 { $$ = SAVE_EXT_FLAGS();
2674                   pedantic = 0;
2675                   warn_pointer_arith = 0;
2676                   warn_traditional = 0;
2677                   flag_iso = 0; }
2678         ;
2679 \f
2680 ifobjc
2681 /* Objective-C productions.  */
2682
2683 objcdef:
2684           classdef
2685         | classdecl
2686         | aliasdecl
2687         | protocoldef
2688         | methoddef
2689         | END
2690                 {
2691                   if (objc_implementation_context)
2692                     {
2693                       finish_class (objc_implementation_context);
2694                       objc_ivar_chain = NULL_TREE;
2695                       objc_implementation_context = NULL_TREE;
2696                     }
2697                   else
2698                     warning ("`@end' must appear in an implementation context");
2699                 }
2700         ;
2701
2702 /* A nonempty list of identifiers.  */
2703 identifier_list:
2704         identifier
2705                 { $$ = build_tree_list (NULL_TREE, $1); }
2706         | identifier_list ',' identifier
2707                 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2708         ;
2709
2710 classdecl:
2711           CLASS identifier_list ';'
2712                 {
2713                   objc_declare_class ($2);
2714                 }
2715         ;
2716
2717 aliasdecl:
2718           ALIAS identifier identifier ';'
2719                 {
2720                   objc_declare_alias ($2, $3);
2721                 }
2722         ;
2723
2724 classdef:
2725           INTERFACE identifier protocolrefs '{'
2726                 {
2727                   objc_interface_context = objc_ivar_context
2728                     = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2729                   objc_public_flag = 0;
2730                 }
2731           ivar_decl_list '}'
2732                 {
2733                   continue_class (objc_interface_context);
2734                 }
2735           methodprotolist
2736           END
2737                 {
2738                   finish_class (objc_interface_context);
2739                   objc_interface_context = NULL_TREE;
2740                 }
2741
2742         | INTERFACE identifier protocolrefs
2743                 {
2744                   objc_interface_context
2745                     = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2746                   continue_class (objc_interface_context);
2747                 }
2748           methodprotolist
2749           END
2750                 {
2751                   finish_class (objc_interface_context);
2752                   objc_interface_context = NULL_TREE;
2753                 }
2754
2755         | INTERFACE identifier ':' identifier protocolrefs '{'
2756                 {
2757                   objc_interface_context = objc_ivar_context
2758                     = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2759                   objc_public_flag = 0;
2760                 }
2761           ivar_decl_list '}'
2762                 {
2763                   continue_class (objc_interface_context);
2764                 }
2765           methodprotolist
2766           END
2767                 {
2768                   finish_class (objc_interface_context);
2769                   objc_interface_context = NULL_TREE;
2770                 }
2771
2772         | INTERFACE identifier ':' identifier protocolrefs
2773                 {
2774                   objc_interface_context
2775                     = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2776                   continue_class (objc_interface_context);
2777                 }
2778           methodprotolist
2779           END
2780                 {
2781                   finish_class (objc_interface_context);
2782                   objc_interface_context = NULL_TREE;
2783                 }
2784
2785         | IMPLEMENTATION identifier '{'
2786                 {
2787                   objc_implementation_context = objc_ivar_context
2788                     = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2789                   objc_public_flag = 0;
2790                 }
2791           ivar_decl_list '}'
2792                 {
2793                   objc_ivar_chain
2794                     = continue_class (objc_implementation_context);
2795                 }
2796
2797         | IMPLEMENTATION identifier
2798                 {
2799                   objc_implementation_context
2800                     = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2801                   objc_ivar_chain
2802                     = continue_class (objc_implementation_context);
2803                 }
2804
2805         | IMPLEMENTATION identifier ':' identifier '{'
2806                 {
2807                   objc_implementation_context = objc_ivar_context
2808                     = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2809                   objc_public_flag = 0;
2810                 }
2811           ivar_decl_list '}'
2812                 {
2813                   objc_ivar_chain
2814                     = continue_class (objc_implementation_context);
2815                 }
2816
2817         | IMPLEMENTATION identifier ':' identifier
2818                 {
2819                   objc_implementation_context
2820                     = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2821                   objc_ivar_chain
2822                     = continue_class (objc_implementation_context);
2823                 }
2824
2825         | INTERFACE identifier '(' identifier ')' protocolrefs
2826                 {
2827                   objc_interface_context
2828                     = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2829                   continue_class (objc_interface_context);
2830                 }
2831           methodprotolist
2832           END
2833                 {
2834                   finish_class (objc_interface_context);
2835                   objc_interface_context = NULL_TREE;
2836                 }
2837
2838         | IMPLEMENTATION identifier '(' identifier ')'
2839                 {
2840                   objc_implementation_context
2841                     = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2842                   objc_ivar_chain
2843                     = continue_class (objc_implementation_context);
2844                 }
2845         ;
2846
2847 protocoldef:
2848           PROTOCOL identifier protocolrefs
2849                 {
2850                   objc_pq_context = 1;
2851                   objc_interface_context
2852                     = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2853                 }
2854           methodprotolist END
2855                 {
2856                   objc_pq_context = 0;
2857                   finish_protocol(objc_interface_context);
2858                   objc_interface_context = NULL_TREE;
2859                 }
2860         /* The @protocol forward-declaration production introduces a
2861            reduce/reduce conflict on ';', which should be resolved in
2862            favor of the production 'identifier_list -> identifier'.  */
2863         | PROTOCOL identifier_list ';'
2864                 {
2865                   objc_declare_protocols ($2);
2866                 }
2867         ;
2868
2869 protocolrefs:
2870           /* empty */
2871                 {
2872                   $$ = NULL_TREE;
2873                 }
2874         | non_empty_protocolrefs
2875         ;
2876
2877 non_empty_protocolrefs:
2878           ARITHCOMPARE identifier_list ARITHCOMPARE
2879                 {
2880                   if ($1 == LT_EXPR && $3 == GT_EXPR)
2881                     $$ = $2;
2882                   else
2883                     YYERROR1;
2884                 }
2885         ;
2886
2887 ivar_decl_list:
2888           ivar_decl_list visibility_spec ivar_decls
2889         | ivar_decls
2890         ;
2891
2892 visibility_spec:
2893           PRIVATE { objc_public_flag = 2; }
2894         | PROTECTED { objc_public_flag = 0; }
2895         | PUBLIC { objc_public_flag = 1; }
2896         ;
2897
2898 ivar_decls:
2899           /* empty */
2900                 {
2901                   $$ = NULL_TREE;
2902                 }
2903         | ivar_decls ivar_decl ';'
2904         | ivar_decls ';'
2905                 {
2906                   if (pedantic)
2907                     pedwarn ("extra semicolon in struct or union specified");
2908                 }
2909         ;
2910
2911
2912 /* There is a shift-reduce conflict here, because `components' may
2913    start with a `typename'.  It happens that shifting (the default resolution)
2914    does the right thing, because it treats the `typename' as part of
2915    a `typed_typespecs'.
2916
2917    It is possible that this same technique would allow the distinction
2918    between `notype_initdecls' and `initdecls' to be eliminated.
2919    But I am being cautious and not trying it.  */
2920
2921 ivar_decl:
2922         declspecs_nosc_ts setspecs ivars
2923                 { $$ = $3;
2924                   POP_DECLSPEC_STACK; }
2925         | declspecs_nosc_nots setspecs ivars
2926                 { $$ = $3;
2927                   POP_DECLSPEC_STACK; }
2928         | error
2929                 { $$ = NULL_TREE; }
2930         ;
2931
2932 ivars:
2933           /* empty */
2934                 { $$ = NULL_TREE; }
2935         | ivar_declarator
2936         | ivars ',' maybe_resetattrs ivar_declarator
2937         ;
2938
2939 ivar_declarator:
2940           declarator
2941                 {
2942                   $$ = add_instance_variable (objc_ivar_context,
2943                                               objc_public_flag,
2944                                               $1, current_declspecs,
2945                                               NULL_TREE);
2946                 }
2947         | declarator ':' expr_no_commas
2948                 {
2949                   $$ = add_instance_variable (objc_ivar_context,
2950                                               objc_public_flag,
2951                                               $1, current_declspecs, $3);
2952                 }
2953         | ':' expr_no_commas
2954                 {
2955                   $$ = add_instance_variable (objc_ivar_context,
2956                                               objc_public_flag,
2957                                               NULL_TREE,
2958                                               current_declspecs, $2);
2959                 }
2960         ;
2961
2962 methodtype:
2963           '+'
2964                 { objc_inherit_code = CLASS_METHOD_DECL; }
2965         | '-'
2966                 { objc_inherit_code = INSTANCE_METHOD_DECL; }
2967         ;
2968
2969 methoddef:
2970           methodtype
2971                 {
2972                   objc_pq_context = 1;
2973                   if (!objc_implementation_context)
2974                     fatal_error ("method definition not in class context");
2975                 }
2976           methoddecl
2977                 {
2978                   objc_pq_context = 0;
2979                   if (objc_inherit_code == CLASS_METHOD_DECL)
2980                     add_class_method (objc_implementation_context, $3);
2981                   else
2982                     add_instance_method (objc_implementation_context, $3);
2983                   start_method_def ($3);
2984                 }
2985           optarglist
2986                 {
2987                   continue_method_def ();
2988                 }
2989           compstmt_or_error
2990                 {
2991                   finish_method_def ();
2992                 }
2993         ;
2994
2995 /* the reason for the strange actions in this rule
2996  is so that notype_initdecls when reached via datadef
2997  can find a valid list of type and sc specs in $0. */
2998
2999 methodprotolist:
3000           /* empty  */
3001         | {$<ttype>$ = NULL_TREE; } methodprotolist2
3002         ;
3003
3004 methodprotolist2:                /* eliminates a shift/reduce conflict */
3005            methodproto
3006         |  datadef
3007         | methodprotolist2 methodproto
3008         | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
3009         ;
3010
3011 semi_or_error:
3012           ';'
3013         | error
3014         ;
3015
3016 methodproto:
3017           methodtype
3018                 {
3019                   /* Remember protocol qualifiers in prototypes.  */
3020                   objc_pq_context = 1;
3021                 }
3022           methoddecl
3023                 {
3024                   /* Forget protocol qualifiers here.  */
3025                   objc_pq_context = 0;
3026                   if (objc_inherit_code == CLASS_METHOD_DECL)
3027                     add_class_method (objc_interface_context, $3);
3028                   else
3029                     add_instance_method (objc_interface_context, $3);
3030                 }
3031           semi_or_error
3032         ;
3033
3034 methoddecl:
3035           '(' typename ')' unaryselector
3036                 {
3037                   $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
3038                 }
3039
3040         | unaryselector
3041                 {
3042                   $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
3043                 }
3044
3045         | '(' typename ')' keywordselector optparmlist
3046                 {
3047                   $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
3048                 }
3049
3050         | keywordselector optparmlist
3051                 {
3052                   $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
3053                 }
3054         ;
3055
3056 /* "optarglist" assumes that start_method_def has already been called...
3057    if it is not, the "xdecls" will not be placed in the proper scope */
3058
3059 optarglist:
3060           /* empty */
3061         | ';' myxdecls
3062         ;
3063
3064 /* to get around the following situation: "int foo (int a) int b; {}" that
3065    is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
3066
3067 myxdecls:
3068           /* empty */
3069         | mydecls
3070         ;
3071
3072 mydecls:
3073         mydecl
3074         | errstmt
3075         | mydecls mydecl
3076         | mydecl errstmt
3077         ;
3078
3079 mydecl:
3080         declspecs_ts setspecs myparms ';'
3081                 { POP_DECLSPEC_STACK; }
3082         | declspecs_ts ';'
3083                 { shadow_tag ($1); }
3084         | declspecs_nots ';'
3085                 { pedwarn ("empty declaration"); }
3086         ;
3087
3088 myparms:
3089         myparm
3090                 { push_parm_decl ($1); }
3091         | myparms ',' myparm
3092                 { push_parm_decl ($3); }
3093         ;
3094
3095 /* A single parameter declaration or parameter type name,
3096    as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
3097
3098 myparm:
3099           parm_declarator maybe_attribute
3100                 { $$ = build_tree_list (build_tree_list (current_declspecs,
3101                                                          $1),
3102                                         chainon ($2, all_prefix_attributes)); }
3103         | notype_declarator maybe_attribute
3104                 { $$ = build_tree_list (build_tree_list (current_declspecs,
3105                                                          $1),
3106                                         chainon ($2, all_prefix_attributes)); }
3107         | absdcl_maybe_attribute
3108                 { $$ = $1; }
3109         ;
3110
3111 optparmlist:
3112           /* empty */
3113                 {
3114                   $$ = NULL_TREE;
3115                 }
3116         | ',' ELLIPSIS
3117                 {
3118                   /* oh what a kludge! */
3119                   $$ = objc_ellipsis_node;
3120                 }
3121         | ','
3122                 {
3123                   pushlevel (0);
3124                 }
3125           parmlist_2
3126                 {
3127                   /* returns a tree list node generated by get_parm_info */
3128                   $$ = $3;
3129                   poplevel (0, 0, 0);
3130                 }
3131         ;
3132
3133 unaryselector:
3134           selector
3135         ;
3136
3137 keywordselector:
3138           keyworddecl
3139
3140         | keywordselector keyworddecl
3141                 {
3142                   $$ = chainon ($1, $2);
3143                 }
3144         ;
3145
3146 selector:
3147           IDENTIFIER
3148         | TYPENAME
3149         | CLASSNAME
3150         | OBJECTNAME
3151         | reservedwords
3152         ;
3153
3154 reservedwords:
3155           ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
3156         | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
3157         | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
3158         | TYPESPEC | TYPE_QUAL
3159         ;
3160
3161 keyworddecl:
3162           selector ':' '(' typename ')' identifier
3163                 {
3164                   $$ = build_keyword_decl ($1, $4, $6);
3165                 }
3166
3167         | selector ':' identifier
3168                 {
3169                   $$ = build_keyword_decl ($1, NULL_TREE, $3);
3170                 }
3171
3172         | ':' '(' typename ')' identifier
3173                 {
3174                   $$ = build_keyword_decl (NULL_TREE, $3, $5);
3175                 }
3176
3177         | ':' identifier
3178                 {
3179                   $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
3180                 }
3181         ;
3182
3183 messageargs:
3184           selector
3185         | keywordarglist
3186         ;
3187
3188 keywordarglist:
3189           keywordarg
3190         | keywordarglist keywordarg
3191                 {
3192                   $$ = chainon ($1, $2);
3193                 }
3194         ;
3195
3196
3197 keywordexpr:
3198           nonnull_exprlist
3199                 {
3200                   if (TREE_CHAIN ($1) == NULL_TREE)
3201                     /* just return the expr., remove a level of indirection */
3202                     $$ = TREE_VALUE ($1);
3203                   else
3204                     /* we have a comma expr., we will collapse later */
3205                     $$ = $1;
3206                 }
3207         ;
3208
3209 keywordarg:
3210           selector ':' keywordexpr
3211                 {
3212                   $$ = build_tree_list ($1, $3);
3213                 }
3214         | ':' keywordexpr
3215                 {
3216                   $$ = build_tree_list (NULL_TREE, $2);
3217                 }
3218         ;
3219
3220 receiver:
3221           expr
3222         | CLASSNAME
3223                 {
3224                   $$ = get_class_reference ($1);
3225                 }
3226         ;
3227
3228 objcmessageexpr:
3229           '[' receiver messageargs ']'
3230                 { $$ = build_tree_list ($2, $3); }
3231         ;
3232
3233 selectorarg:
3234           selector
3235         | keywordnamelist
3236         ;
3237
3238 keywordnamelist:
3239           keywordname
3240         | keywordnamelist keywordname
3241                 {
3242                   $$ = chainon ($1, $2);
3243                 }
3244         ;
3245
3246 keywordname:
3247           selector ':'
3248                 {
3249                   $$ = build_tree_list ($1, NULL_TREE);
3250                 }
3251         | ':'
3252                 {
3253                   $$ = build_tree_list (NULL_TREE, NULL_TREE);
3254                 }
3255         ;
3256
3257 objcselectorexpr:
3258           SELECTOR '(' selectorarg ')'
3259                 {
3260                   $$ = $3;
3261                 }
3262         ;
3263
3264 objcprotocolexpr:
3265           PROTOCOL '(' identifier ')'
3266                 {
3267                   $$ = $3;
3268                 }
3269         ;
3270
3271 /* extension to support C-structures in the archiver */
3272
3273 objcencodeexpr:
3274           ENCODE '(' typename ')'
3275                 {
3276                   $$ = groktypename ($3);
3277                 }
3278         ;
3279
3280 end ifobjc
3281 %%
3282
3283 /* yylex() is a thin wrapper around c_lex(), all it does is translate
3284    cpplib.h's token codes into yacc's token codes.  */
3285
3286 static enum cpp_ttype last_token;
3287
3288 /* The reserved keyword table.  */
3289 struct resword
3290 {
3291   const char *word;
3292   ENUM_BITFIELD(rid) rid : 16;
3293   unsigned int disable   : 16;
3294 };
3295
3296 /* Disable mask.  Keywords are disabled if (reswords[i].disable & mask) is
3297    _true_.  */
3298 #define D_C89   0x01    /* not in C89 */
3299 #define D_EXT   0x02    /* GCC extension */
3300 #define D_EXT89 0x04    /* GCC extension incorporated in C99 */
3301 #define D_OBJC  0x08    /* Objective C only */
3302
3303 static const struct resword reswords[] =
3304 {
3305   { "_Bool",            RID_BOOL,       0 },
3306   { "_Complex",         RID_COMPLEX,    0 },
3307   { "__FUNCTION__",     RID_FUNCTION_NAME, 0 },
3308   { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
3309   { "__alignof",        RID_ALIGNOF,    0 },
3310   { "__alignof__",      RID_ALIGNOF,    0 },
3311   { "__asm",            RID_ASM,        0 },
3312   { "__asm__",          RID_ASM,        0 },
3313   { "__attribute",      RID_ATTRIBUTE,  0 },
3314   { "__attribute__",    RID_ATTRIBUTE,  0 },
3315   { "__bounded",        RID_BOUNDED,    0 },
3316   { "__bounded__",      RID_BOUNDED,    0 },
3317   { "__builtin_choose_expr", RID_CHOOSE_EXPR, 0 },
3318   { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P, 0 },
3319   { "__builtin_va_arg", RID_VA_ARG,     0 },
3320   { "__complex",        RID_COMPLEX,    0 },
3321   { "__complex__",      RID_COMPLEX,    0 },
3322   { "__const",          RID_CONST,      0 },
3323   { "__const__",        RID_CONST,      0 },
3324   { "__extension__",    RID_EXTENSION,  0 },
3325   { "__func__",         RID_C99_FUNCTION_NAME, 0 },
3326   { "__imag",           RID_IMAGPART,   0 },
3327   { "__imag__",         RID_IMAGPART,   0 },
3328   { "__inline",         RID_INLINE,     0 },
3329   { "__inline__",       RID_INLINE,     0 },
3330   { "__label__",        RID_LABEL,      0 },
3331   { "__ptrbase",        RID_PTRBASE,    0 },
3332   { "__ptrbase__",      RID_PTRBASE,    0 },
3333   { "__ptrextent",      RID_PTREXTENT,  0 },
3334   { "__ptrextent__",    RID_PTREXTENT,  0 },
3335   { "__ptrvalue",       RID_PTRVALUE,   0 },
3336   { "__ptrvalue__",     RID_PTRVALUE,   0 },
3337   { "__real",           RID_REALPART,   0 },
3338   { "__real__",         RID_REALPART,   0 },
3339   { "__restrict",       RID_RESTRICT,   0 },
3340   { "__restrict__",     RID_RESTRICT,   0 },
3341   { "__signed",         RID_SIGNED,     0 },
3342   { "__signed__",       RID_SIGNED,     0 },
3343   { "__thread",         RID_THREAD,     0 },
3344   { "__typeof",         RID_TYPEOF,     0 },
3345   { "__typeof__",       RID_TYPEOF,     0 },
3346   { "__unbounded",      RID_UNBOUNDED,  0 },
3347   { "__unbounded__",    RID_UNBOUNDED,  0 },
3348   { "__volatile",       RID_VOLATILE,   0 },
3349   { "__volatile__",     RID_VOLATILE,   0 },
3350   { "asm",              RID_ASM,        D_EXT },
3351   { "auto",             RID_AUTO,       0 },
3352   { "break",            RID_BREAK,      0 },
3353   { "case",             RID_CASE,       0 },
3354   { "char",             RID_CHAR,       0 },
3355   { "const",            RID_CONST,      0 },
3356   { "continue",         RID_CONTINUE,   0 },
3357   { "default",          RID_DEFAULT,    0 },
3358   { "do",               RID_DO,         0 },
3359   { "double",           RID_DOUBLE,     0 },
3360   { "else",             RID_ELSE,       0 },
3361   { "enum",             RID_ENUM,       0 },
3362   { "extern",           RID_EXTERN,     0 },
3363   { "float",            RID_FLOAT,      0 },
3364   { "for",              RID_FOR,        0 },
3365   { "goto",             RID_GOTO,       0 },
3366   { "if",               RID_IF,         0 },
3367   { "inline",           RID_INLINE,     D_EXT89 },
3368   { "int",              RID_INT,        0 },
3369   { "long",             RID_LONG,       0 },
3370   { "register",         RID_REGISTER,   0 },
3371   { "restrict",         RID_RESTRICT,   D_C89 },
3372   { "return",           RID_RETURN,     0 },
3373   { "short",            RID_SHORT,      0 },
3374   { "signed",           RID_SIGNED,     0 },
3375   { "sizeof",           RID_SIZEOF,     0 },
3376   { "static",           RID_STATIC,     0 },
3377   { "struct",           RID_STRUCT,     0 },
3378   { "switch",           RID_SWITCH,     0 },
3379   { "typedef",          RID_TYPEDEF,    0 },
3380   { "typeof",           RID_TYPEOF,     D_EXT },
3381   { "union",            RID_UNION,      0 },
3382   { "unsigned",         RID_UNSIGNED,   0 },
3383   { "void",             RID_VOID,       0 },
3384   { "volatile",         RID_VOLATILE,   0 },
3385   { "while",            RID_WHILE,      0 },
3386 ifobjc
3387   { "id",               RID_ID,                 D_OBJC },
3388
3389   /* These objc keywords are recognized only immediately after
3390      an '@'.  */
3391   { "class",            RID_AT_CLASS,           D_OBJC },
3392   { "compatibility_alias", RID_AT_ALIAS,        D_OBJC },
3393   { "defs",             RID_AT_DEFS,            D_OBJC },
3394   { "encode",           RID_AT_ENCODE,          D_OBJC },
3395   { "end",              RID_AT_END,             D_OBJC },
3396   { "implementation",   RID_AT_IMPLEMENTATION,  D_OBJC },
3397   { "interface",        RID_AT_INTERFACE,       D_OBJC },
3398   { "private",          RID_AT_PRIVATE,         D_OBJC },
3399   { "protected",        RID_AT_PROTECTED,       D_OBJC },
3400   { "protocol",         RID_AT_PROTOCOL,        D_OBJC },
3401   { "public",           RID_AT_PUBLIC,          D_OBJC },
3402   { "selector",         RID_AT_SELECTOR,        D_OBJC },
3403
3404   /* These are recognized only in protocol-qualifier context
3405      (see above) */
3406   { "bycopy",           RID_BYCOPY,             D_OBJC },
3407   { "byref",            RID_BYREF,              D_OBJC },
3408   { "in",               RID_IN,                 D_OBJC },
3409   { "inout",            RID_INOUT,              D_OBJC },
3410   { "oneway",           RID_ONEWAY,             D_OBJC },
3411   { "out",              RID_OUT,                D_OBJC },
3412 end ifobjc
3413 };
3414 #define N_reswords (sizeof reswords / sizeof (struct resword))
3415
3416 /* Table mapping from RID_* constants to yacc token numbers.
3417    Unfortunately we have to have entries for all the keywords in all
3418    three languages.  */
3419 static const short rid_to_yy[RID_MAX] =
3420 {
3421   /* RID_STATIC */      STATIC,
3422   /* RID_UNSIGNED */    TYPESPEC,
3423   /* RID_LONG */        TYPESPEC,
3424   /* RID_CONST */       TYPE_QUAL,
3425   /* RID_EXTERN */      SCSPEC,
3426   /* RID_REGISTER */    SCSPEC,
3427   /* RID_TYPEDEF */     SCSPEC,
3428   /* RID_SHORT */       TYPESPEC,
3429   /* RID_INLINE */      SCSPEC,
3430   /* RID_VOLATILE */    TYPE_QUAL,
3431   /* RID_SIGNED */      TYPESPEC,
3432   /* RID_AUTO */        SCSPEC,
3433   /* RID_RESTRICT */    TYPE_QUAL,
3434
3435   /* C extensions */
3436   /* RID_BOUNDED */     TYPE_QUAL,
3437   /* RID_UNBOUNDED */   TYPE_QUAL,
3438   /* RID_COMPLEX */     TYPESPEC,
3439   /* RID_THREAD */      SCSPEC,
3440
3441   /* C++ */
3442   /* RID_FRIEND */      0,
3443   /* RID_VIRTUAL */     0,
3444   /* RID_EXPLICIT */    0,
3445   /* RID_EXPORT */      0,
3446   /* RID_MUTABLE */     0,
3447
3448   /* ObjC */
3449   /* RID_IN */          TYPE_QUAL,
3450   /* RID_OUT */         TYPE_QUAL,
3451   /* RID_INOUT */       TYPE_QUAL,
3452   /* RID_BYCOPY */      TYPE_QUAL,
3453   /* RID_BYREF */       TYPE_QUAL,
3454   /* RID_ONEWAY */      TYPE_QUAL,
3455
3456   /* C */
3457   /* RID_INT */         TYPESPEC,
3458   /* RID_CHAR */        TYPESPEC,
3459   /* RID_FLOAT */       TYPESPEC,
3460   /* RID_DOUBLE */      TYPESPEC,
3461   /* RID_VOID */        TYPESPEC,
3462   /* RID_ENUM */        ENUM,
3463   /* RID_STRUCT */      STRUCT,
3464   /* RID_UNION */       UNION,
3465   /* RID_IF */          IF,
3466   /* RID_ELSE */        ELSE,
3467   /* RID_WHILE */       WHILE,
3468   /* RID_DO */          DO,
3469   /* RID_FOR */         FOR,
3470   /* RID_SWITCH */      SWITCH,
3471   /* RID_CASE */        CASE,
3472   /* RID_DEFAULT */     DEFAULT,
3473   /* RID_BREAK */       BREAK,
3474   /* RID_CONTINUE */    CONTINUE,
3475   /* RID_RETURN */      RETURN,
3476   /* RID_GOTO */        GOTO,
3477   /* RID_SIZEOF */      SIZEOF,
3478
3479   /* C extensions */
3480   /* RID_ASM */         ASM_KEYWORD,
3481   /* RID_TYPEOF */      TYPEOF,
3482   /* RID_ALIGNOF */     ALIGNOF,
3483   /* RID_ATTRIBUTE */   ATTRIBUTE,
3484   /* RID_VA_ARG */      VA_ARG,
3485   /* RID_EXTENSION */   EXTENSION,
3486   /* RID_IMAGPART */    IMAGPART,
3487   /* RID_REALPART */    REALPART,
3488   /* RID_LABEL */       LABEL,
3489   /* RID_PTRBASE */     PTR_BASE,
3490   /* RID_PTREXTENT */   PTR_EXTENT,
3491   /* RID_PTRVALUE */    PTR_VALUE,
3492
3493   /* RID_CHOOSE_EXPR */                 CHOOSE_EXPR,
3494   /* RID_TYPES_COMPATIBLE_P */          TYPES_COMPATIBLE_P,
3495
3496   /* RID_FUNCTION_NAME */               STRING_FUNC_NAME,
3497   /* RID_PRETTY_FUNCTION_NAME */        STRING_FUNC_NAME,
3498   /* RID_C99_FUNCTION_NAME */           VAR_FUNC_NAME,
3499
3500   /* C++ */
3501   /* RID_BOOL */        TYPESPEC,
3502   /* RID_WCHAR */       0,
3503   /* RID_CLASS */       0,
3504   /* RID_PUBLIC */      0,
3505   /* RID_PRIVATE */     0,
3506   /* RID_PROTECTED */   0,
3507   /* RID_TEMPLATE */    0,
3508   /* RID_NULL */        0,
3509   /* RID_CATCH */       0,
3510   /* RID_DELETE */      0,
3511   /* RID_FALSE */       0,
3512   /* RID_NAMESPACE */   0,
3513   /* RID_NEW */         0,
3514   /* RID_OPERATOR */    0,
3515   /* RID_THIS */        0,
3516   /* RID_THROW */       0,
3517   /* RID_TRUE */        0,
3518   /* RID_TRY */         0,
3519   /* RID_TYPENAME */    0,
3520   /* RID_TYPEID */      0,
3521   /* RID_USING */       0,
3522
3523   /* casts */
3524   /* RID_CONSTCAST */   0,
3525   /* RID_DYNCAST */     0,
3526   /* RID_REINTCAST */   0,
3527   /* RID_STATCAST */    0,
3528
3529   /* Objective C */
3530   /* RID_ID */                  OBJECTNAME,
3531   /* RID_AT_ENCODE */           ENCODE,
3532   /* RID_AT_END */              END,
3533   /* RID_AT_CLASS */            CLASS,
3534   /* RID_AT_ALIAS */            ALIAS,
3535   /* RID_AT_DEFS */             DEFS,
3536   /* RID_AT_PRIVATE */          PRIVATE,
3537   /* RID_AT_PROTECTED */        PROTECTED,
3538   /* RID_AT_PUBLIC */           PUBLIC,
3539   /* RID_AT_PROTOCOL */         PROTOCOL,
3540   /* RID_AT_SELECTOR */         SELECTOR,
3541   /* RID_AT_INTERFACE */        INTERFACE,
3542   /* RID_AT_IMPLEMENTATION */   IMPLEMENTATION
3543 };
3544
3545 static void
3546 init_reswords ()
3547 {
3548   unsigned int i;
3549   tree id;
3550   int mask = (flag_isoc99 ? 0 : D_C89)
3551               | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
3552
3553   if (!flag_objc)
3554      mask |= D_OBJC;
3555
3556   ridpointers = (tree *) ggc_calloc ((int) RID_MAX, sizeof (tree));
3557   for (i = 0; i < N_reswords; i++)
3558     {
3559       /* If a keyword is disabled, do not enter it into the table
3560          and so create a canonical spelling that isn't a keyword.  */
3561       if (reswords[i].disable & mask)
3562         continue;
3563
3564       id = get_identifier (reswords[i].word);
3565       C_RID_CODE (id) = reswords[i].rid;
3566       C_IS_RESERVED_WORD (id) = 1;
3567       ridpointers [(int) reswords[i].rid] = id;
3568     }
3569 }
3570
3571 #define NAME(type) cpp_type2name (type)
3572
3573 static void
3574 yyerror (msgid)
3575      const char *msgid;
3576 {
3577   const char *string = _(msgid);
3578
3579   if (last_token == CPP_EOF)
3580     error ("%s at end of input", string);
3581   else if (last_token == CPP_CHAR || last_token == CPP_WCHAR)
3582     {
3583       unsigned int val = TREE_INT_CST_LOW (yylval.ttype);
3584       const char *const ell = (last_token == CPP_CHAR) ? "" : "L";
3585       if (val <= UCHAR_MAX && ISGRAPH (val))
3586         error ("%s before %s'%c'", string, ell, val);
3587       else
3588         error ("%s before %s'\\x%x'", string, ell, val);
3589     }
3590   else if (last_token == CPP_STRING
3591            || last_token == CPP_WSTRING)
3592     error ("%s before string constant", string);
3593   else if (last_token == CPP_NUMBER)
3594     error ("%s before numeric constant", string);
3595   else if (last_token == CPP_NAME)
3596     error ("%s before \"%s\"", string, IDENTIFIER_POINTER (yylval.ttype));
3597   else
3598     error ("%s before '%s' token", string, NAME(last_token));
3599 }
3600
3601 static int
3602 yylexname ()
3603 {
3604   tree decl;
3605
3606 ifobjc
3607   int objc_force_identifier = objc_need_raw_identifier;
3608   OBJC_NEED_RAW_IDENTIFIER (0);
3609 end ifobjc
3610
3611   if (C_IS_RESERVED_WORD (yylval.ttype))
3612     {
3613       enum rid rid_code = C_RID_CODE (yylval.ttype);
3614
3615 ifobjc
3616       /* Turn non-typedefed refs to "id" into plain identifiers; this
3617          allows constructs like "void foo(id id);" to work.  */
3618       if (rid_code == RID_ID)
3619       {
3620         decl = lookup_name (yylval.ttype);
3621         if (decl == NULL_TREE || TREE_CODE (decl) != TYPE_DECL)
3622           return IDENTIFIER;
3623       }
3624
3625       if (!OBJC_IS_AT_KEYWORD (rid_code)
3626           && (!OBJC_IS_PQ_KEYWORD (rid_code) || objc_pq_context))
3627 end ifobjc
3628       {
3629         int yycode = rid_to_yy[(int) rid_code];
3630         if (yycode == STRING_FUNC_NAME)
3631           {
3632             /* __FUNCTION__ and __PRETTY_FUNCTION__ get converted
3633                to string constants.  */
3634             const char *name = fname_string (rid_code);
3635
3636             yylval.ttype = build_string (strlen (name) + 1, name);
3637             C_ARTIFICIAL_STRING_P (yylval.ttype) = 1;
3638             last_token = CPP_STRING;  /* so yyerror won't choke */
3639             return STRING;
3640           }
3641
3642         /* Return the canonical spelling for this keyword.  */
3643         yylval.ttype = ridpointers[(int) rid_code];
3644         return yycode;
3645       }
3646     }
3647
3648   decl = lookup_name (yylval.ttype);
3649   if (decl)
3650     {
3651       if (TREE_CODE (decl) == TYPE_DECL)
3652         return TYPENAME;
3653     }
3654 ifobjc
3655   else
3656     {
3657       tree objc_interface_decl = is_class_name (yylval.ttype);
3658       /* ObjC class names are in the same namespace as variables and
3659          typedefs, and hence are shadowed by local declarations.  */
3660       if (objc_interface_decl
3661           && (global_bindings_p ()
3662               || (!objc_force_identifier && !decl)))
3663         {
3664           yylval.ttype = objc_interface_decl;
3665           return CLASSNAME;
3666         }
3667     }
3668 end ifobjc
3669
3670   return IDENTIFIER;
3671 }
3672
3673 /* Concatenate strings before returning them to the parser.  This isn't quite
3674    as good as having it done in the lexer, but it's better than nothing.  */
3675
3676 static int
3677 yylexstring ()
3678 {
3679   enum cpp_ttype next_type;
3680   tree orig = yylval.ttype;
3681
3682   next_type = c_lex (&yylval.ttype);
3683   if (next_type == CPP_STRING
3684       || next_type == CPP_WSTRING
3685       || (next_type == CPP_NAME && yylexname () == STRING))
3686     {
3687       varray_type strings;
3688
3689 ifc
3690       static int last_lineno = 0;
3691       static const char *last_input_filename = 0;
3692       if (warn_traditional && !in_system_header
3693           && (lineno != last_lineno || !last_input_filename ||
3694               strcmp (last_input_filename, input_filename)))
3695         {
3696           warning ("traditional C rejects string concatenation");
3697           last_lineno = lineno;
3698           last_input_filename = input_filename;
3699         }
3700 end ifc
3701
3702       VARRAY_TREE_INIT (strings, 32, "strings");
3703       VARRAY_PUSH_TREE (strings, orig);
3704
3705       do
3706         {
3707           VARRAY_PUSH_TREE (strings, yylval.ttype);
3708           next_type = c_lex (&yylval.ttype);
3709         }
3710       while (next_type == CPP_STRING
3711              || next_type == CPP_WSTRING
3712              || (next_type == CPP_NAME && yylexname () == STRING));
3713
3714       yylval.ttype = combine_strings (strings);
3715     }
3716   else
3717     yylval.ttype = orig;
3718
3719   /* We will have always read one token too many.  */
3720   _cpp_backup_tokens (parse_in, 1);
3721
3722   return STRING;
3723 }
3724
3725 static inline int
3726 _yylex ()
3727 {
3728  get_next:
3729   last_token = c_lex (&yylval.ttype);
3730   switch (last_token)
3731     {
3732     case CPP_EQ:                                        return '=';
3733     case CPP_NOT:                                       return '!';
3734     case CPP_GREATER:   yylval.code = GT_EXPR;          return ARITHCOMPARE;
3735     case CPP_LESS:      yylval.code = LT_EXPR;          return ARITHCOMPARE;
3736     case CPP_PLUS:      yylval.code = PLUS_EXPR;        return '+';
3737     case CPP_MINUS:     yylval.code = MINUS_EXPR;       return '-';
3738     case CPP_MULT:      yylval.code = MULT_EXPR;        return '*';
3739     case CPP_DIV:       yylval.code = TRUNC_DIV_EXPR;   return '/';
3740     case CPP_MOD:       yylval.code = TRUNC_MOD_EXPR;   return '%';
3741     case CPP_AND:       yylval.code = BIT_AND_EXPR;     return '&';
3742     case CPP_OR:        yylval.code = BIT_IOR_EXPR;     return '|';
3743     case CPP_XOR:       yylval.code = BIT_XOR_EXPR;     return '^';
3744     case CPP_RSHIFT:    yylval.code = RSHIFT_EXPR;      return RSHIFT;
3745     case CPP_LSHIFT:    yylval.code = LSHIFT_EXPR;      return LSHIFT;
3746
3747     case CPP_COMPL:                                     return '~';
3748     case CPP_AND_AND:                                   return ANDAND;
3749     case CPP_OR_OR:                                     return OROR;
3750     case CPP_QUERY:                                     return '?';
3751     case CPP_OPEN_PAREN:                                return '(';
3752     case CPP_EQ_EQ:     yylval.code = EQ_EXPR;          return EQCOMPARE;
3753     case CPP_NOT_EQ:    yylval.code = NE_EXPR;          return EQCOMPARE;
3754     case CPP_GREATER_EQ:yylval.code = GE_EXPR;          return ARITHCOMPARE;
3755     case CPP_LESS_EQ:   yylval.code = LE_EXPR;          return ARITHCOMPARE;
3756
3757     case CPP_PLUS_EQ:   yylval.code = PLUS_EXPR;        return ASSIGN;
3758     case CPP_MINUS_EQ:  yylval.code = MINUS_EXPR;       return ASSIGN;
3759     case CPP_MULT_EQ:   yylval.code = MULT_EXPR;        return ASSIGN;
3760     case CPP_DIV_EQ:    yylval.code = TRUNC_DIV_EXPR;   return ASSIGN;
3761     case CPP_MOD_EQ:    yylval.code = TRUNC_MOD_EXPR;   return ASSIGN;
3762     case CPP_AND_EQ:    yylval.code = BIT_AND_EXPR;     return ASSIGN;
3763     case CPP_OR_EQ:     yylval.code = BIT_IOR_EXPR;     return ASSIGN;
3764     case CPP_XOR_EQ:    yylval.code = BIT_XOR_EXPR;     return ASSIGN;
3765     case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR;      return ASSIGN;
3766     case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR;      return ASSIGN;
3767
3768     case CPP_OPEN_SQUARE:                               return '[';
3769     case CPP_CLOSE_SQUARE:                              return ']';
3770     case CPP_OPEN_BRACE:                                return '{';
3771     case CPP_CLOSE_BRACE:                               return '}';
3772     case CPP_ELLIPSIS:                                  return ELLIPSIS;
3773
3774     case CPP_PLUS_PLUS:                                 return PLUSPLUS;
3775     case CPP_MINUS_MINUS:                               return MINUSMINUS;
3776     case CPP_DEREF:                                     return POINTSAT;
3777     case CPP_DOT:                                       return '.';
3778
3779       /* The following tokens may affect the interpretation of any
3780          identifiers following, if doing Objective-C.  */
3781     case CPP_COLON:             OBJC_NEED_RAW_IDENTIFIER (0);   return ':';
3782     case CPP_COMMA:             OBJC_NEED_RAW_IDENTIFIER (0);   return ',';
3783     case CPP_CLOSE_PAREN:       OBJC_NEED_RAW_IDENTIFIER (0);   return ')';
3784     case CPP_SEMICOLON:         OBJC_NEED_RAW_IDENTIFIER (0);   return ';';
3785
3786     case CPP_EOF:
3787       return 0;
3788
3789     case CPP_NAME:
3790       {
3791         int ret = yylexname ();
3792         if (ret == STRING)
3793           return yylexstring ();
3794         else
3795           return ret;
3796       }
3797
3798     case CPP_NUMBER:
3799     case CPP_CHAR:
3800     case CPP_WCHAR:
3801       return CONSTANT;
3802
3803     case CPP_STRING:
3804     case CPP_WSTRING:
3805       return yylexstring ();
3806
3807       /* This token is Objective-C specific.  It gives the next token
3808          special significance.  */
3809     case CPP_ATSIGN:
3810 ifobjc
3811       {
3812         tree after_at;
3813         enum cpp_ttype after_at_type;
3814
3815         after_at_type = c_lex (&after_at);
3816
3817         if (after_at_type == CPP_NAME
3818             && C_IS_RESERVED_WORD (after_at)
3819             && OBJC_IS_AT_KEYWORD (C_RID_CODE (after_at)))
3820           {
3821             yylval.ttype = after_at;
3822             last_token = after_at_type;
3823             return rid_to_yy [(int) C_RID_CODE (after_at)];
3824           }
3825         _cpp_backup_tokens (parse_in, 1);
3826         return '@';
3827       }
3828 end ifobjc
3829
3830       /* These tokens are C++ specific (and will not be generated
3831          in C mode, but let's be cautious).  */
3832     case CPP_SCOPE:
3833     case CPP_DEREF_STAR:
3834     case CPP_DOT_STAR:
3835     case CPP_MIN_EQ:
3836     case CPP_MAX_EQ:
3837     case CPP_MIN:
3838     case CPP_MAX:
3839       /* These tokens should not survive translation phase 4.  */
3840     case CPP_HASH:
3841     case CPP_PASTE:
3842       error ("syntax error at '%s' token", NAME(last_token));
3843       goto get_next;
3844
3845     default:
3846       abort ();
3847     }
3848   /* NOTREACHED */
3849 }
3850
3851 static int
3852 yylex()
3853 {
3854   int r;
3855   timevar_push (TV_LEX);
3856   r = _yylex();
3857   timevar_pop (TV_LEX);
3858   return r;
3859 }
3860
3861 /* Function used when yydebug is set, to print a token in more detail.  */
3862
3863 static void
3864 yyprint (file, yychar, yyl)
3865      FILE *file;
3866      int yychar;
3867      YYSTYPE yyl;
3868 {
3869   tree t = yyl.ttype;
3870
3871   fprintf (file, " [%s]", NAME(last_token));
3872
3873   switch (yychar)
3874     {
3875     case IDENTIFIER:
3876     case TYPENAME:
3877     case OBJECTNAME:
3878     case TYPESPEC:
3879     case TYPE_QUAL:
3880     case SCSPEC:
3881     case STATIC:
3882       if (IDENTIFIER_POINTER (t))
3883         fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
3884       break;
3885
3886     case CONSTANT:
3887       fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3888       if (TREE_CODE (t) == INTEGER_CST)
3889         {
3890           fputs (" ", file);
3891           fprintf (file, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
3892                    TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3893         }
3894       break;
3895     }
3896 }
3897 \f
3898 /* This is not the ideal place to put these, but we have to get them out
3899    of c-lex.c because cp/lex.c has its own versions.  */
3900
3901 /* Free malloced parser stacks if necessary.  */
3902
3903 void
3904 free_parser_stacks ()
3905 {
3906   if (malloced_yyss)
3907     {
3908       free (malloced_yyss);
3909       free (malloced_yyvs);
3910     }
3911 }
3912
3913 #include "gt-c-parse.h"