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 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 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 ifobjc
  32 %expect 74
  33 end ifobjc
  34 ifc
  35 %expect 53
  36 end ifc
  37
  38 %{
  39 #include "config.h"
  40 #include "system.h"
  41 #include <setjmp.h>
  42 #include "tree.h"
  43 #include "input.h"
  44 #include "cpplib.h"
  45 #include "intl.h"
  46 #include "timevar.h"
  47 #include "c-lex.h"
  48 #include "c-tree.h"
  49 #include "c-pragma.h"
  50 #include "flags.h"
  51 #include "output.h"
  52 #include "toplev.h"
  53 #include "ggc.h"
  54
  55 #ifdef MULTIBYTE_CHARS
  56 #include <locale.h>
  57 #endif
  58
  59 ifobjc
  60 #include "objc-act.h"
  61 end ifobjc
  62
  63 /* Since parsers are distinct for each language, put the language string
  64    definition here.  */
  65 ifobjc
  66 const char * const language_string = "GNU Objective-C";
  67 end ifobjc
  68 ifc
  69 const char * const language_string = "GNU C";
  70 end ifc
  71
  72 /* Like YYERROR but do call yyerror.  */
  73 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
  74
  75 /* Cause the `yydebug' variable to be defined.  */
  76 #define YYDEBUG 1
  77 %}
  78
  79 %start program
  80
  81 %union {long itype; tree ttype; enum tree_code code;
  82         const char *filename; int lineno; int ends_in_label; }
  83
  84 /* All identifiers that are not reserved words
  85    and are not declared typedefs in the current block */
  86 %token IDENTIFIER
  87
  88 /* All identifiers that are declared typedefs in the current block.
  89    In some contexts, they are treated just like IDENTIFIER,
  90    but they can also serve as typespecs in declarations.  */
  91 %token TYPENAME
  92
  93 /* Reserved words that specify storage class.
  94    yylval contains an IDENTIFIER_NODE which indicates which one.  */
  95 %token SCSPEC
  96
  97 /* Reserved words that specify type.
  98    yylval contains an IDENTIFIER_NODE which indicates which one.  */
  99 %token TYPESPEC
 100
 101 /* Reserved words that qualify type: "const", "volatile", or "restrict".
 102    yylval contains an IDENTIFIER_NODE which indicates which one.  */
 103 %token TYPE_QUAL
 104
 105 /* Character or numeric constants.
 106    yylval is the node for the constant.  */
 107 %token CONSTANT
 108
 109 /* String constants in raw form.
 110    yylval is a STRING_CST node.  */
 111 %token STRING
 112
 113 /* "...", used for functions with variable arglists.  */
 114 %token ELLIPSIS
 115
 116 /* the reserved words */
 117 /* SCO include files test "ASM", so use something else. */
 118 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
 119 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
 120 %token ATTRIBUTE EXTENSION LABEL
 121 %token REALPART IMAGPART VA_ARG
 122 %token PTR_VALUE PTR_BASE PTR_EXTENT
 123
 124 /* Add precedence rules to solve dangling else s/r conflict */
 125 %nonassoc IF
 126 %nonassoc ELSE
 127
 128 /* Define the operator tokens and their precedences.
 129    The value is an integer because, if used, it is the tree code
 130    to use in the expression made from the operator.  */
 131
 132 %right <code> ASSIGN '='
 133 %right <code> '?' ':'
 134 %left <code> OROR
 135 %left <code> ANDAND
 136 %left <code> '|'
 137 %left <code> '^'
 138 %left <code> '&'
 139 %left <code> EQCOMPARE
 140 %left <code> ARITHCOMPARE
 141 %left <code> LSHIFT RSHIFT
 142 %left <code> '+' '-'
 143 %left <code> '*' '/' '%'
 144 %right <code> UNARY PLUSPLUS MINUSMINUS
 145 %left HYPERUNARY
 146 %left <code> POINTSAT '.' '(' '['
 147
 148 /* The Objective-C keywords.  These are included in C and in
 149    Objective C, so that the token codes are the same in both.  */
 150 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
 151 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
 152
 153 /* Objective-C string constants in raw form.
 154    yylval is an STRING_CST node.  */
 155 %token OBJC_STRING
 156
 157
 158 %type <code> unop
 159 %type <ttype> ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
 160 %type <ttype> BREAK CONTINUE RETURN GOTO ASM_KEYWORD SIZEOF TYPEOF ALIGNOF
 161
 162 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
 163 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
 164 %type <ttype> typed_declspecs reserved_declspecs
 165 %type <ttype> typed_typespecs reserved_typespecquals
 166 %type <ttype> declmods typespec typespecqual_reserved
 167 %type <ttype> typed_declspecs_no_prefix_attr reserved_declspecs_no_prefix_attr
 168 %type <ttype> declmods_no_prefix_attr
 169 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
 170 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
 171 %type <ttype> init maybeasm
 172 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
 173 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
 174 %type <ttype> any_word extension
 175
 176 %type <ttype> compstmt compstmt_nostart compstmt_primary_start
 177
 178 %type <ttype> declarator
 179 %type <ttype> notype_declarator after_type_declarator
 180 %type <ttype> parm_declarator
 181
 182 %type <ttype> structsp component_decl_list component_decl_list2
 183 %type <ttype> component_decl components component_declarator
 184 %type <ttype> enumlist enumerator
 185 %type <ttype> struct_head union_head enum_head
 186 %type <ttype> typename absdcl absdcl1 type_quals
 187 %type <ttype> xexpr parms parm identifiers
 188
 189 %type <ttype> parmlist parmlist_1 parmlist_2
 190 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
 191 %type <ttype> identifiers_or_typenames
 192
 193 %type <itype> setspecs
 194
 195 %type <ends_in_label> lineno_stmt_or_label lineno_stmt_or_labels stmt_or_label
 196
 197 %type <filename> save_filename
 198 %type <lineno> save_lineno
 199 \f
 200 ifobjc
 201 /* the Objective-C nonterminals */
 202
 203 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
 204 %type <ttype> methoddecl unaryselector keywordselector selector
 205 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
 206 %type <ttype> keywordexpr keywordarglist keywordarg
 207 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
 208 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
 209 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
 210
 211 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
 212 end ifobjc
 213 \f
 214 %{
 215 /* Number of statements (loosely speaking) and compound statements
 216    seen so far.  */
 217 static int stmt_count;
 218 static int compstmt_count;
 219
 220 /* Input file and line number of the end of the body of last simple_if;
 221    used by the stmt-rule immediately after simple_if returns.  */
 222 static const char *if_stmt_file;
 223 static int if_stmt_line;
 224
 225 /* List of types and structure classes of the current declaration.  */
 226 static tree current_declspecs = NULL_TREE;
 227 static tree prefix_attributes = NULL_TREE;
 228
 229 /* Stack of saved values of current_declspecs and prefix_attributes.  */
 230 static tree declspec_stack;
 231
 232 /* For __extension__, save/restore the warning flags which are
 233    controlled by __extension__.  */
 234 #define SAVE_WARN_FLAGS()       \
 235         size_int (pedantic | (warn_pointer_arith << 1))
 236 #define RESTORE_WARN_FLAGS(tval) \
 237   do {                                     \
 238     int val = tree_low_cst (tval, 0);      \
 239     pedantic = val & 1;                    \
 240     warn_pointer_arith = (val >> 1) & 1;   \
 241   } while (0)
 242
 243 ifobjc
 244 /* Objective-C specific information */
 245
 246 tree objc_interface_context;
 247 tree objc_implementation_context;
 248 tree objc_method_context;
 249 tree objc_ivar_chain;
 250 tree objc_ivar_context;
 251 enum tree_code objc_inherit_code;
 252 int objc_receiver_context;
 253 int objc_public_flag;
 254
 255 end ifobjc
 256
 257 /* Tell yyparse how to print a token's value, if yydebug is set.  */
 258
 259 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
 260
 261 static void yyprint       PARAMS ((FILE *, int, YYSTYPE));
 262 static void yyerror       PARAMS ((const char *));
 263 static inline int _yylex  PARAMS ((void));
 264 static int  yylex         PARAMS ((void));
 265 static void init_reswords PARAMS ((void));
 266
 267 /* Add GC roots for variables local to this file.  */
 268 void
 269 c_parse_init ()
 270 {
 271   ggc_add_tree_root (&declspec_stack, 1);
 272   ggc_add_tree_root (&current_declspecs, 1);
 273   ggc_add_tree_root (&prefix_attributes, 1);
 274 ifobjc
 275   ggc_add_tree_root (&objc_interface_context, 1);
 276   ggc_add_tree_root (&objc_implementation_context, 1);
 277   ggc_add_tree_root (&objc_method_context, 1);
 278   ggc_add_tree_root (&objc_ivar_chain, 1);
 279   ggc_add_tree_root (&objc_ivar_context, 1);
 280 end ifobjc
 281 }
 282
 283 %}
 284 \f
 285 %%
 286 program: /* empty */
 287                 { if (pedantic)
 288                     pedwarn ("ISO C forbids an empty source file");
 289                   finish_file ();
 290                 }
 291         | extdefs
 292                 {
 293                   /* In case there were missing closebraces,
 294                      get us back to the global binding level.  */
 295                   while (! global_bindings_p ())
 296                     poplevel (0, 0, 0);
 297                   finish_file ();
 298                 }
 299         ;
 300
 301 /* the reason for the strange actions in this rule
 302  is so that notype_initdecls when reached via datadef
 303  can find a valid list of type and sc specs in $0. */
 304
 305 extdefs:
 306         {$<ttype>$ = NULL_TREE; } extdef
 307         | extdefs {$<ttype>$ = NULL_TREE; ggc_collect(); } extdef
 308         ;
 309
 310 extdef:
 311         fndef
 312         | datadef
 313 ifobjc
 314         | objcdef
 315 end ifobjc
 316         | ASM_KEYWORD '(' expr ')' ';'
 317                 { STRIP_NOPS ($3);
 318                   if ((TREE_CODE ($3) == ADDR_EXPR
 319                        && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
 320                       || TREE_CODE ($3) == STRING_CST)
 321                     assemble_asm ($3);
 322                   else
 323                     error ("argument of `asm' is not a constant string"); }
 324         | extension extdef
 325                 { RESTORE_WARN_FLAGS ($1); }
 326         ;
 327
 328 datadef:
 329           setspecs notype_initdecls ';'
 330                 { if (pedantic)
 331                     error ("ISO C forbids data definition with no type or storage class");
 332                   else if (!flag_traditional)
 333                     warning ("data definition has no type or storage class");
 334
 335                   current_declspecs = TREE_VALUE (declspec_stack);
 336                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 337                   declspec_stack = TREE_CHAIN (declspec_stack); }
 338         | declmods setspecs notype_initdecls ';'
 339                 { current_declspecs = TREE_VALUE (declspec_stack);
 340                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 341                   declspec_stack = TREE_CHAIN (declspec_stack); }
 342         | typed_declspecs setspecs initdecls ';'
 343                 { current_declspecs = TREE_VALUE (declspec_stack);
 344                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 345                   declspec_stack = TREE_CHAIN (declspec_stack); }
 346         | declmods ';'
 347           { pedwarn ("empty declaration"); }
 348         | typed_declspecs ';'
 349           { shadow_tag ($1); }
 350         | error ';'
 351         | error '}'
 352         | ';'
 353                 { if (pedantic)
 354                     pedwarn ("ISO C does not allow extra `;' outside of a function"); }
 355         ;
 356 \f
 357 fndef:
 358           typed_declspecs setspecs declarator
 359                 { if (! start_function (current_declspecs, $3,
 360                                         prefix_attributes, NULL_TREE))
 361                     YYERROR1;
 362                 }
 363           old_style_parm_decls
 364                 { store_parm_decls (); }
 365           compstmt_or_error
 366                 { finish_function (0);
 367                   current_declspecs = TREE_VALUE (declspec_stack);
 368                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 369                   declspec_stack = TREE_CHAIN (declspec_stack); }
 370         | typed_declspecs setspecs declarator error
 371                 { current_declspecs = TREE_VALUE (declspec_stack);
 372                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 373                   declspec_stack = TREE_CHAIN (declspec_stack); }
 374         | declmods setspecs notype_declarator
 375                 { if (! start_function (current_declspecs, $3,
 376                                         prefix_attributes, NULL_TREE))
 377                     YYERROR1;
 378                 }
 379           old_style_parm_decls
 380                 { store_parm_decls (); }
 381           compstmt_or_error
 382                 { finish_function (0);
 383                   current_declspecs = TREE_VALUE (declspec_stack);
 384                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 385                   declspec_stack = TREE_CHAIN (declspec_stack); }
 386         | declmods setspecs notype_declarator error
 387                 { current_declspecs = TREE_VALUE (declspec_stack);
 388                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 389                   declspec_stack = TREE_CHAIN (declspec_stack); }
 390         | setspecs notype_declarator
 391                 { if (! start_function (NULL_TREE, $2,
 392                                         prefix_attributes, NULL_TREE))
 393                     YYERROR1;
 394                 }
 395           old_style_parm_decls
 396                 { store_parm_decls (); }
 397           compstmt_or_error
 398                 { finish_function (0);
 399                   current_declspecs = TREE_VALUE (declspec_stack);
 400                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 401                   declspec_stack = TREE_CHAIN (declspec_stack); }
 402         | setspecs notype_declarator error
 403                 { current_declspecs = TREE_VALUE (declspec_stack);
 404                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 405                   declspec_stack = TREE_CHAIN (declspec_stack); }
 406         ;
 407
 408 identifier:
 409         IDENTIFIER
 410         | TYPENAME
 411 ifobjc
 412         | OBJECTNAME
 413         | CLASSNAME
 414 end ifobjc
 415         ;
 416
 417 unop:     '&'
 418                 { $$ = ADDR_EXPR; }
 419         | '-'
 420                 { $$ = NEGATE_EXPR; }
 421         | '+'
 422                 { $$ = CONVERT_EXPR;
 423 ifc
 424   if (warn_traditional && !in_system_header)
 425     warning ("traditional C rejects the unary plus operator");
 426 end ifc
 427                 }
 428         | PLUSPLUS
 429                 { $$ = PREINCREMENT_EXPR; }
 430         | MINUSMINUS
 431                 { $$ = PREDECREMENT_EXPR; }
 432         | '~'
 433                 { $$ = BIT_NOT_EXPR; }
 434         | '!'
 435                 { $$ = TRUTH_NOT_EXPR; }
 436         ;
 437
 438 expr:   nonnull_exprlist
 439                 { $$ = build_compound_expr ($1); }
 440         ;
 441
 442 exprlist:
 443           /* empty */
 444                 { $$ = NULL_TREE; }
 445         | nonnull_exprlist
 446         ;
 447
 448 nonnull_exprlist:
 449         expr_no_commas
 450                 { $$ = build_tree_list (NULL_TREE, $1); }
 451         | nonnull_exprlist ',' expr_no_commas
 452                 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
 453         ;
 454
 455 unary_expr:
 456         primary
 457         | '*' cast_expr   %prec UNARY
 458                 { $$ = build_indirect_ref ($2, "unary *"); }
 459         /* __extension__ turns off -pedantic for following primary.  */
 460         | extension cast_expr     %prec UNARY
 461                 { $$ = $2;
 462                   RESTORE_WARN_FLAGS ($1); }
 463         | unop cast_expr  %prec UNARY
 464                 { $$ = build_unary_op ($1, $2, 0);
 465                   overflow_warning ($$); }
 466         /* Refer to the address of a label as a pointer.  */
 467         | ANDAND identifier
 468                 { tree label = lookup_label ($2);
 469                   if (pedantic)
 470                     pedwarn ("ISO C forbids `&&'");
 471                   if (label == 0)
 472                     $$ = null_pointer_node;
 473                   else
 474                     {
 475                       TREE_USED (label) = 1;
 476                       $$ = build1 (ADDR_EXPR, ptr_type_node, label);
 477                       TREE_CONSTANT ($$) = 1;
 478                     }
 479                 }
 480 /* This seems to be impossible on some machines, so let's turn it off.
 481    You can use __builtin_next_arg to find the anonymous stack args.
 482         | '&' ELLIPSIS
 483                 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
 484                   $$ = error_mark_node;
 485                   if (TREE_VALUE (tree_last (types)) == void_type_node)
 486                     error ("`&...' used in function with fixed number of arguments");
 487                   else
 488                     {
 489                       if (pedantic)
 490                         pedwarn ("ISO C forbids `&...'");
 491                       $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
 492                       $$ = build_unary_op (ADDR_EXPR, $$, 0);
 493                     } }
 494 */
 495         | sizeof unary_expr  %prec UNARY
 496                 { skip_evaluation--;
 497                   if (TREE_CODE ($2) == COMPONENT_REF
 498                       && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
 499                     error ("`sizeof' applied to a bit-field");
 500                   $$ = c_sizeof (TREE_TYPE ($2)); }
 501         | sizeof '(' typename ')'  %prec HYPERUNARY
 502                 { skip_evaluation--;
 503                   $$ = c_sizeof (groktypename ($3)); }
 504         | alignof unary_expr  %prec UNARY
 505                 { skip_evaluation--;
 506                   $$ = c_alignof_expr ($2); }
 507         | alignof '(' typename ')'  %prec HYPERUNARY
 508                 { skip_evaluation--;
 509                   $$ = c_alignof (groktypename ($3)); }
 510         | REALPART cast_expr %prec UNARY
 511                 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
 512         | IMAGPART cast_expr %prec UNARY
 513                 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
 514         | VA_ARG '(' expr_no_commas ',' typename ')'
 515                 { $$ = build_va_arg ($3, groktypename ($5)); }
 516         ;
 517
 518 sizeof:
 519         SIZEOF { skip_evaluation++; }
 520         ;
 521
 522 alignof:
 523         ALIGNOF { skip_evaluation++; }
 524         ;
 525
 526 cast_expr:
 527         unary_expr
 528         | '(' typename ')' cast_expr  %prec UNARY
 529                 { tree type;
 530                   int SAVED_warn_strict_prototypes = warn_strict_prototypes;
 531                   /* This avoids warnings about unprototyped casts on
 532                      integers.  E.g. "#define SIG_DFL (void(*)())0".  */
 533                   if (TREE_CODE ($4) == INTEGER_CST)
 534                     warn_strict_prototypes = 0;
 535                   type = groktypename ($2);
 536                   warn_strict_prototypes = SAVED_warn_strict_prototypes;
 537                   $$ = build_c_cast (type, $4); }
 538         | '(' typename ')' '{'
 539                 { start_init (NULL_TREE, NULL, 0);
 540                   $2 = groktypename ($2);
 541                   really_start_incremental_init ($2); }
 542           initlist_maybe_comma '}'  %prec UNARY
 543                 { const char *name;
 544                   tree result = pop_init_level (0);
 545                   tree type = $2;
 546                   finish_init ();
 547
 548                   if (pedantic && ! flag_isoc99)
 549                     pedwarn ("ISO C89 forbids constructor expressions");
 550                   if (TYPE_NAME (type) != 0)
 551                     {
 552                       if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
 553                         name = IDENTIFIER_POINTER (TYPE_NAME (type));
 554                       else
 555                         name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
 556                     }
 557                   else
 558                     name = "";
 559                   $$ = result;
 560                   if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
 561                     {
 562                       int failure = complete_array_type (type, $$, 1);
 563                       if (failure)
 564                         abort ();
 565                     }
 566                 }
 567         ;
 568
 569 expr_no_commas:
 570           cast_expr
 571         | expr_no_commas '+' expr_no_commas
 572                 { $$ = parser_build_binary_op ($2, $1, $3); }
 573         | expr_no_commas '-' expr_no_commas
 574                 { $$ = parser_build_binary_op ($2, $1, $3); }
 575         | expr_no_commas '*' expr_no_commas
 576                 { $$ = parser_build_binary_op ($2, $1, $3); }
 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 LSHIFT expr_no_commas
 582                 { $$ = parser_build_binary_op ($2, $1, $3); }
 583         | expr_no_commas RSHIFT expr_no_commas
 584                 { $$ = parser_build_binary_op ($2, $1, $3); }
 585         | expr_no_commas ARITHCOMPARE expr_no_commas
 586                 { $$ = parser_build_binary_op ($2, $1, $3); }
 587         | expr_no_commas EQCOMPARE expr_no_commas
 588                 { $$ = parser_build_binary_op ($2, $1, $3); }
 589         | expr_no_commas '&' expr_no_commas
 590                 { $$ = parser_build_binary_op ($2, $1, $3); }
 591         | expr_no_commas '|' expr_no_commas
 592                 { $$ = parser_build_binary_op ($2, $1, $3); }
 593         | expr_no_commas '^' expr_no_commas
 594                 { $$ = parser_build_binary_op ($2, $1, $3); }
 595         | expr_no_commas ANDAND
 596                 { $1 = truthvalue_conversion (default_conversion ($1));
 597                   skip_evaluation += $1 == boolean_false_node; }
 598           expr_no_commas
 599                 { skip_evaluation -= $1 == boolean_false_node;
 600                   $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
 601         | expr_no_commas OROR
 602                 { $1 = truthvalue_conversion (default_conversion ($1));
 603                   skip_evaluation += $1 == boolean_true_node; }
 604           expr_no_commas
 605                 { skip_evaluation -= $1 == boolean_true_node;
 606                   $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
 607         | expr_no_commas '?'
 608                 { $1 = truthvalue_conversion (default_conversion ($1));
 609                   skip_evaluation += $1 == boolean_false_node; }
 610           expr ':'
 611                 { skip_evaluation += (($1 == boolean_true_node)
 612                                       - ($1 == boolean_false_node)); }
 613           expr_no_commas
 614                 { skip_evaluation -= $1 == boolean_true_node;
 615                   $$ = build_conditional_expr ($1, $4, $7); }
 616         | expr_no_commas '?'
 617                 { if (pedantic)
 618                     pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
 619                   /* Make sure first operand is calculated only once.  */
 620                   $<ttype>2 = save_expr ($1);
 621                   $1 = truthvalue_conversion (default_conversion ($<ttype>2));
 622                   skip_evaluation += $1 == boolean_true_node; }
 623           ':' expr_no_commas
 624                 { skip_evaluation -= $1 == boolean_true_node;
 625                   $$ = build_conditional_expr ($1, $<ttype>2, $5); }
 626         | expr_no_commas '=' expr_no_commas
 627                 { char class;
 628                   $$ = build_modify_expr ($1, NOP_EXPR, $3);
 629                   class = TREE_CODE_CLASS (TREE_CODE ($$));
 630                   if (class == 'e' || class == '1'
 631                       || class == '2' || class == '<')
 632                     C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
 633                 }
 634         | expr_no_commas ASSIGN expr_no_commas
 635                 { char class;
 636                   $$ = build_modify_expr ($1, $2, $3);
 637                   /* This inhibits warnings in truthvalue_conversion.  */
 638                   class = TREE_CODE_CLASS (TREE_CODE ($$));
 639                   if (class == 'e' || class == '1'
 640                       || class == '2' || class == '<')
 641                     C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
 642                 }
 643         ;
 644
 645 primary:
 646         IDENTIFIER
 647                 {
 648                   if (yychar == YYEMPTY)
 649                     yychar = YYLEX;
 650                   $$ = build_external_ref ($1, yychar == '(');
 651                 }
 652         | CONSTANT
 653         | string
 654                 { $$ = combine_strings ($1); }
 655         | '(' expr ')'
 656                 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
 657                   if (class == 'e' || class == '1'
 658                       || class == '2' || class == '<')
 659                     C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
 660                   $$ = $2; }
 661         | '(' error ')'
 662                 { $$ = error_mark_node; }
 663         | compstmt_primary_start compstmt_nostart ')'
 664                 { tree rtl_exp;
 665                   if (pedantic)
 666                     pedwarn ("ISO C forbids braced-groups within expressions");
 667                   pop_label_level ();
 668                   rtl_exp = expand_end_stmt_expr ($1);
 669                   /* The statements have side effects, so the group does.  */
 670                   TREE_SIDE_EFFECTS (rtl_exp) = 1;
 671
 672                   if (TREE_CODE ($2) == BLOCK)
 673                     {
 674                       /* Make a BIND_EXPR for the BLOCK already made.  */
 675                       $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
 676                                   NULL_TREE, rtl_exp, $2);
 677                       /* Remove the block from the tree at this point.
 678                          It gets put back at the proper place
 679                          when the BIND_EXPR is expanded.  */
 680                       delete_block ($2);
 681                     }
 682                   else
 683                     $$ = $2;
 684                 }
 685         | compstmt_primary_start error ')'
 686                 {
 687                   /* Make sure we call expand_end_stmt_expr.  Otherwise
 688                      we are likely to lose sequences and crash later.  */
 689                   pop_label_level ();
 690                   expand_end_stmt_expr ($1);
 691                   $$ = error_mark_node;
 692                 }
 693         | primary '(' exprlist ')'   %prec '.'
 694                 { $$ = build_function_call ($1, $3); }
 695         | primary '[' expr ']'   %prec '.'
 696                 { $$ = build_array_ref ($1, $3); }
 697         | primary '.' identifier
 698                 {
 699 ifobjc
 700                   if (doing_objc_thang)
 701                     {
 702                       if (is_public ($1, $3))
 703                         $$ = build_component_ref ($1, $3);
 704                       else
 705                         $$ = error_mark_node;
 706                     }
 707                   else
 708 end ifobjc
 709                     $$ = build_component_ref ($1, $3);
 710                 }
 711         | primary POINTSAT identifier
 712                 {
 713                   tree expr = build_indirect_ref ($1, "->");
 714
 715 ifobjc
 716                   if (doing_objc_thang)
 717                     {
 718                       if (is_public (expr, $3))
 719                         $$ = build_component_ref (expr, $3);
 720                       else
 721                         $$ = error_mark_node;
 722                     }
 723                   else
 724 end ifobjc
 725                     $$ = build_component_ref (expr, $3);
 726                 }
 727         | primary PLUSPLUS
 728                 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
 729         | primary MINUSMINUS
 730                 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
 731 ifobjc
 732         | objcmessageexpr
 733                 { $$ = build_message_expr ($1); }
 734         | objcselectorexpr
 735                 { $$ = build_selector_expr ($1); }
 736         | objcprotocolexpr
 737                 { $$ = build_protocol_expr ($1); }
 738         | objcencodeexpr
 739                 { $$ = build_encode_expr ($1); }
 740         | objc_string
 741                 { $$ = build_objc_string_object ($1); }
 742 end ifobjc
 743         ;
 744
 745 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it.  */
 746 string:
 747           STRING
 748         | string STRING
 749                 {
 750 ifc
 751                   static int last_lineno = 0;
 752                   static const char *last_input_filename = 0;
 753 end ifc
 754                   $$ = chainon ($1, $2);
 755 ifc
 756                   if (warn_traditional && !in_system_header
 757                       && (lineno != last_lineno || !last_input_filename ||
 758                           strcmp (last_input_filename, input_filename)))
 759                     {
 760                       warning ("traditional C rejects string concatenation");
 761                       last_lineno = lineno;
 762                       last_input_filename = input_filename;
 763                     }
 764 end ifc
 765                 }
 766         ;
 767
 768 ifobjc
 769 /* Produces an STRING_CST with perhaps more STRING_CSTs chained
 770    onto it, which is to be read as an ObjC string object.  */
 771 objc_string:
 772           OBJC_STRING
 773         | objc_string OBJC_STRING
 774                 { $$ = chainon ($1, $2); }
 775         ;
 776 end ifobjc
 777
 778 old_style_parm_decls:
 779         /* empty */
 780         | datadecls
 781         | datadecls ELLIPSIS
 782                 /* ... is used here to indicate a varargs function.  */
 783                 { c_mark_varargs ();
 784                   if (pedantic)
 785                     pedwarn ("ISO C does not permit use of `varargs.h'"); }
 786         ;
 787
 788 /* The following are analogous to lineno_decl, decls and decl
 789    except that they do not allow nested functions.
 790    They are used for old-style parm decls.  */
 791 lineno_datadecl:
 792           save_filename save_lineno datadecl
 793                 { }
 794         ;
 795
 796 datadecls:
 797         lineno_datadecl
 798         | errstmt
 799         | datadecls lineno_datadecl
 800         | lineno_datadecl errstmt
 801         ;
 802
 803 /* We don't allow prefix attributes here because they cause reduce/reduce
 804    conflicts: we can't know whether we're parsing a function decl with
 805    attribute suffix, or function defn with attribute prefix on first old
 806    style parm.  */
 807 datadecl:
 808         typed_declspecs_no_prefix_attr setspecs initdecls ';'
 809                 { current_declspecs = TREE_VALUE (declspec_stack);
 810                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 811                   declspec_stack = TREE_CHAIN (declspec_stack); }
 812         | declmods_no_prefix_attr setspecs notype_initdecls ';'
 813                 { current_declspecs = TREE_VALUE (declspec_stack);
 814                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 815                   declspec_stack = TREE_CHAIN (declspec_stack); }
 816         | typed_declspecs_no_prefix_attr ';'
 817                 { shadow_tag_warned ($1, 1);
 818                   pedwarn ("empty declaration"); }
 819         | declmods_no_prefix_attr ';'
 820                 { pedwarn ("empty declaration"); }
 821         ;
 822
 823 /* This combination which saves a lineno before a decl
 824    is the normal thing to use, rather than decl itself.
 825    This is to avoid shift/reduce conflicts in contexts
 826    where statement labels are allowed.  */
 827 lineno_decl:
 828           save_filename save_lineno decl
 829                 { }
 830         ;
 831
 832 decls:
 833         lineno_decl
 834         | errstmt
 835         | decls lineno_decl
 836         | lineno_decl errstmt
 837         ;
 838
 839 /* records the type and storage class specs to use for processing
 840    the declarators that follow.
 841    Maintains a stack of outer-level values of current_declspecs,
 842    for the sake of parm declarations nested in function declarators.  */
 843 setspecs: /* empty */
 844                 { pending_xref_error ();
 845                   declspec_stack = tree_cons (prefix_attributes,
 846                                               current_declspecs,
 847                                               declspec_stack);
 848                   split_specs_attrs ($<ttype>0,
 849                                      &current_declspecs, &prefix_attributes); }
 850         ;
 851
 852 /* ??? Yuck.  See after_type_declarator.  */
 853 setattrs: /* empty */
 854                 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
 855         ;
 856
 857 decl:
 858         typed_declspecs setspecs initdecls ';'
 859                 { current_declspecs = TREE_VALUE (declspec_stack);
 860                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 861                   declspec_stack = TREE_CHAIN (declspec_stack); }
 862         | declmods setspecs notype_initdecls ';'
 863                 { current_declspecs = TREE_VALUE (declspec_stack);
 864                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 865                   declspec_stack = TREE_CHAIN (declspec_stack); }
 866         | typed_declspecs setspecs nested_function
 867                 { current_declspecs = TREE_VALUE (declspec_stack);
 868                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 869                   declspec_stack = TREE_CHAIN (declspec_stack); }
 870         | declmods setspecs notype_nested_function
 871                 { current_declspecs = TREE_VALUE (declspec_stack);
 872                   prefix_attributes = TREE_PURPOSE (declspec_stack);
 873                   declspec_stack = TREE_CHAIN (declspec_stack); }
 874         | typed_declspecs ';'
 875                 { shadow_tag ($1); }
 876         | declmods ';'
 877                 { pedwarn ("empty declaration"); }
 878         | extension decl
 879                 { RESTORE_WARN_FLAGS ($1); }
 880         ;
 881
 882 /* Declspecs which contain at least one type specifier or typedef name.
 883    (Just `const' or `volatile' is not enough.)
 884    A typedef'd name following these is taken as a name to be declared.
 885    Declspecs have a non-NULL TREE_VALUE, attributes do not.  */
 886
 887 typed_declspecs:
 888           typespec reserved_declspecs
 889                 { $$ = tree_cons (NULL_TREE, $1, $2); }
 890         | declmods typespec reserved_declspecs
 891                 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
 892         ;
 893
 894 reserved_declspecs:  /* empty */
 895                 { $$ = NULL_TREE; }
 896         | reserved_declspecs typespecqual_reserved
 897                 { $$ = tree_cons (NULL_TREE, $2, $1); }
 898         | reserved_declspecs SCSPEC
 899                 { if (extra_warnings)
 900                     warning ("`%s' is not at beginning of declaration",
 901                              IDENTIFIER_POINTER ($2));
 902                   $$ = tree_cons (NULL_TREE, $2, $1); }
 903         | reserved_declspecs attributes
 904                 { $$ = tree_cons ($2, NULL_TREE, $1); }
 905         ;
 906
 907 typed_declspecs_no_prefix_attr:
 908           typespec reserved_declspecs_no_prefix_attr
 909                 { $$ = tree_cons (NULL_TREE, $1, $2); }
 910         | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
 911                 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
 912         ;
 913
 914 reserved_declspecs_no_prefix_attr:
 915           /* empty */
 916                 { $$ = NULL_TREE; }
 917         | reserved_declspecs_no_prefix_attr typespecqual_reserved
 918                 { $$ = tree_cons (NULL_TREE, $2, $1); }
 919         | reserved_declspecs_no_prefix_attr SCSPEC
 920                 { if (extra_warnings)
 921                     warning ("`%s' is not at beginning of declaration",
 922                              IDENTIFIER_POINTER ($2));
 923                   $$ = tree_cons (NULL_TREE, $2, $1); }
 924         ;
 925
 926 /* List of just storage classes, type modifiers, and prefix attributes.
 927    A declaration can start with just this, but then it cannot be used
 928    to redeclare a typedef-name.
 929    Declspecs have a non-NULL TREE_VALUE, attributes do not.  */
 930
 931 declmods:
 932           declmods_no_prefix_attr
 933                 { $$ = $1; }
 934         | attributes
 935                 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
 936         | declmods declmods_no_prefix_attr
 937                 { $$ = chainon ($2, $1); }
 938         | declmods attributes
 939                 { $$ = tree_cons ($2, NULL_TREE, $1); }
 940         ;
 941
 942 declmods_no_prefix_attr:
 943           TYPE_QUAL
 944                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
 945                   TREE_STATIC ($$) = 1; }
 946         | SCSPEC
 947                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
 948         | declmods_no_prefix_attr TYPE_QUAL
 949                 { $$ = tree_cons (NULL_TREE, $2, $1);
 950                   TREE_STATIC ($$) = 1; }
 951         | declmods_no_prefix_attr SCSPEC
 952                 { if (extra_warnings && TREE_STATIC ($1))
 953                     warning ("`%s' is not at beginning of declaration",
 954                              IDENTIFIER_POINTER ($2));
 955                   $$ = tree_cons (NULL_TREE, $2, $1);
 956                   TREE_STATIC ($$) = TREE_STATIC ($1); }
 957         ;
 958
 959
 960 /* Used instead of declspecs where storage classes are not allowed
 961    (that is, for typenames and structure components).
 962    Don't accept a typedef-name if anything but a modifier precedes it.  */
 963
 964 typed_typespecs:
 965           typespec reserved_typespecquals
 966                 { $$ = tree_cons (NULL_TREE, $1, $2); }
 967         | nonempty_type_quals typespec reserved_typespecquals
 968                 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
 969         ;
 970
 971 reserved_typespecquals:  /* empty */
 972                 { $$ = NULL_TREE; }
 973         | reserved_typespecquals typespecqual_reserved
 974                 { $$ = tree_cons (NULL_TREE, $2, $1); }
 975         ;
 976
 977 /* A typespec (but not a type qualifier).
 978    Once we have seen one of these in a declaration,
 979    if a typedef name appears then it is being redeclared.  */
 980
 981 typespec: TYPESPEC
 982         | structsp
 983         | TYPENAME
 984                 { /* For a typedef name, record the meaning, not the name.
 985                      In case of `foo foo, bar;'.  */
 986                   $$ = lookup_name ($1); }
 987 ifobjc
 988         | CLASSNAME protocolrefs
 989                 { $$ = get_static_reference ($1, $2); }
 990         | OBJECTNAME protocolrefs
 991                 { $$ = get_object_reference ($2); }
 992
 993 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
 994    - nisse@lysator.liu.se */
 995         | non_empty_protocolrefs
 996                 { $$ = get_object_reference ($1); }
 997 end ifobjc
 998         | TYPEOF '(' expr ')'
 999                 { $$ = TREE_TYPE ($3); }
1000         | TYPEOF '(' typename ')'
1001                 { $$ = groktypename ($3); }
1002         ;
1003
1004 /* A typespec that is a reserved word, or a type qualifier.  */
1005
1006 typespecqual_reserved: TYPESPEC
1007         | TYPE_QUAL
1008         | structsp
1009         ;
1010
1011 initdecls:
1012         initdcl
1013         | initdecls ',' initdcl
1014         ;
1015
1016 notype_initdecls:
1017         notype_initdcl
1018         | notype_initdecls ',' initdcl
1019         ;
1020
1021 maybeasm:
1022           /* empty */
1023                 { $$ = NULL_TREE; }
1024         | ASM_KEYWORD '(' string ')'
1025                 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1026                   $$ = $3;
1027                 }
1028         ;
1029
1030 initdcl:
1031           declarator maybeasm maybe_attribute '='
1032                 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1033                                           $3, prefix_attributes);
1034                   start_init ($<ttype>$, $2, global_bindings_p ()); }
1035           init
1036 /* Note how the declaration of the variable is in effect while its init is parsed! */
1037                 { finish_init ();
1038                   finish_decl ($<ttype>5, $6, $2); }
1039         | declarator maybeasm maybe_attribute
1040                 { tree d = start_decl ($1, current_declspecs, 0,
1041                                        $3, prefix_attributes);
1042                   finish_decl (d, NULL_TREE, $2);
1043                 }
1044         ;
1045
1046 notype_initdcl:
1047           notype_declarator maybeasm maybe_attribute '='
1048                 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1049                                           $3, prefix_attributes);
1050                   start_init ($<ttype>$, $2, global_bindings_p ()); }
1051           init
1052 /* Note how the declaration of the variable is in effect while its init is parsed! */
1053                 { finish_init ();
1054                   decl_attributes ($<ttype>5, $3, prefix_attributes);
1055                   finish_decl ($<ttype>5, $6, $2); }
1056         | notype_declarator maybeasm maybe_attribute
1057                 { tree d = start_decl ($1, current_declspecs, 0,
1058                                        $3, prefix_attributes);
1059                   finish_decl (d, NULL_TREE, $2); }
1060         ;
1061 /* the * rules are dummies to accept the Apollo extended syntax
1062    so that the header files compile. */
1063 maybe_attribute:
1064       /* empty */
1065                 { $$ = NULL_TREE; }
1066         | attributes
1067                 { $$ = $1; }
1068         ;
1069
1070 attributes:
1071       attribute
1072                 { $$ = $1; }
1073         | attributes attribute
1074                 { $$ = chainon ($1, $2); }
1075         ;
1076
1077 attribute:
1078       ATTRIBUTE '(' '(' attribute_list ')' ')'
1079                 { $$ = $4; }
1080         ;
1081
1082 attribute_list:
1083       attrib
1084                 { $$ = $1; }
1085         | attribute_list ',' attrib
1086                 { $$ = chainon ($1, $3); }
1087         ;
1088
1089 attrib:
1090     /* empty */
1091                 { $$ = NULL_TREE; }
1092         | any_word
1093                 { $$ = build_tree_list ($1, NULL_TREE); }
1094         | any_word '(' IDENTIFIER ')'
1095                 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1096         | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1097                 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1098         | any_word '(' exprlist ')'
1099                 { $$ = build_tree_list ($1, $3); }
1100         ;
1101
1102 /* This still leaves out most reserved keywords,
1103    shouldn't we include them?  */
1104
1105 any_word:
1106           identifier
1107         | SCSPEC
1108         | TYPESPEC
1109         | TYPE_QUAL
1110         ;
1111 \f
1112 /* Initializers.  `init' is the entry point.  */
1113
1114 init:
1115         expr_no_commas
1116         | '{'
1117                 { really_start_incremental_init (NULL_TREE); }
1118           initlist_maybe_comma '}'
1119                 { $$ = pop_init_level (0); }
1120         | error
1121                 { $$ = error_mark_node; }
1122         ;
1123
1124 /* `initlist_maybe_comma' is the guts of an initializer in braces.  */
1125 initlist_maybe_comma:
1126           /* empty */
1127                 { if (pedantic)
1128                     pedwarn ("ISO C forbids empty initializer braces"); }
1129         | initlist1 maybecomma
1130         ;
1131
1132 initlist1:
1133           initelt
1134         | initlist1 ',' initelt
1135         ;
1136
1137 /* `initelt' is a single element of an initializer.
1138    It may use braces.  */
1139 initelt:
1140           designator_list '=' initval
1141         | designator initval
1142         | identifier ':'
1143                 { set_init_label ($1); }
1144           initval
1145         | initval
1146         ;
1147
1148 initval:
1149           '{'
1150                 { push_init_level (0); }
1151           initlist_maybe_comma '}'
1152                 { process_init_element (pop_init_level (0)); }
1153         | expr_no_commas
1154                 { process_init_element ($1); }
1155         | error
1156         ;
1157
1158 designator_list:
1159           designator
1160         | designator_list designator
1161         ;
1162
1163 designator:
1164           '.' identifier
1165                 { set_init_label ($2); }
1166         /* These are for labeled elements.  The syntax for an array element
1167            initializer conflicts with the syntax for an Objective-C message,
1168            so don't include these productions in the Objective-C grammar.  */
1169 ifc
1170         | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1171                 { set_init_index ($2, $4); }
1172         | '[' expr_no_commas ']'
1173                 { set_init_index ($2, NULL_TREE); }
1174 end ifc
1175         ;
1176 \f
1177 nested_function:
1178           declarator
1179                 { if (pedantic)
1180                     pedwarn ("ISO C forbids nested functions");
1181
1182                   push_function_context ();
1183                   if (! start_function (current_declspecs, $1,
1184                                         prefix_attributes, NULL_TREE))
1185                     {
1186                       pop_function_context ();
1187                       YYERROR1;
1188                     }
1189                 }
1190            old_style_parm_decls
1191                 { store_parm_decls (); }
1192 /* This used to use compstmt_or_error.
1193    That caused a bug with input `f(g) int g {}',
1194    where the use of YYERROR1 above caused an error
1195    which then was handled by compstmt_or_error.
1196    There followed a repeated execution of that same rule,
1197    which called YYERROR1 again, and so on.  */
1198           compstmt
1199                 { finish_function (1);
1200                   pop_function_context (); }
1201         ;
1202
1203 notype_nested_function:
1204           notype_declarator
1205                 { if (pedantic)
1206                     pedwarn ("ISO C forbids nested functions");
1207
1208                   push_function_context ();
1209                   if (! start_function (current_declspecs, $1,
1210                                         prefix_attributes, NULL_TREE))
1211                     {
1212                       pop_function_context ();
1213                       YYERROR1;
1214                     }
1215                 }
1216           old_style_parm_decls
1217                 { store_parm_decls (); }
1218 /* This used to use compstmt_or_error.
1219    That caused a bug with input `f(g) int g {}',
1220    where the use of YYERROR1 above caused an error
1221    which then was handled by compstmt_or_error.
1222    There followed a repeated execution of that same rule,
1223    which called YYERROR1 again, and so on.  */
1224           compstmt
1225                 { finish_function (1);
1226                   pop_function_context (); }
1227         ;
1228
1229 /* Any kind of declarator (thus, all declarators allowed
1230    after an explicit typespec).  */
1231
1232 declarator:
1233           after_type_declarator
1234         | notype_declarator
1235         ;
1236
1237 /* A declarator that is allowed only after an explicit typespec.  */
1238
1239 after_type_declarator:
1240           '(' after_type_declarator ')'
1241                 { $$ = $2; }
1242         | after_type_declarator '(' parmlist_or_identifiers  %prec '.'
1243                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1244 /*      | after_type_declarator '(' error ')'  %prec '.'
1245                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1246                   poplevel (0, 0, 0); }  */
1247         | after_type_declarator '[' expr ']'  %prec '.'
1248                 { $$ = build_nt (ARRAY_REF, $1, $3); }
1249         | after_type_declarator '[' ']'  %prec '.'
1250                 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1251         | '*' type_quals after_type_declarator  %prec UNARY
1252                 { $$ = make_pointer_declarator ($2, $3); }
1253         /* ??? Yuck.  setattrs is a quick hack.  We can't use
1254            prefix_attributes because $1 only applies to this
1255            declarator.  We assume setspecs has already been done.
1256            setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1257            attributes could be recognized here or in `attributes').  */
1258         | attributes setattrs after_type_declarator
1259                 { $$ = $3; }
1260         | TYPENAME
1261 ifobjc
1262         | OBJECTNAME
1263 end ifobjc
1264         ;
1265
1266 /* Kinds of declarator that can appear in a parameter list
1267    in addition to notype_declarator.  This is like after_type_declarator
1268    but does not allow a typedef name in parentheses as an identifier
1269    (because it would conflict with a function with that typedef as arg).  */
1270
1271 parm_declarator:
1272           parm_declarator '(' parmlist_or_identifiers  %prec '.'
1273                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1274 /*      | parm_declarator '(' error ')'  %prec '.'
1275                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1276                   poplevel (0, 0, 0); }  */
1277 ifc
1278         | parm_declarator '[' '*' ']'  %prec '.'
1279                 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1280                   if (! flag_isoc99)
1281                     error ("`[*]' in parameter declaration only allowed in ISO C 99");
1282                 }
1283 end ifc
1284         | parm_declarator '[' expr ']'  %prec '.'
1285                 { $$ = build_nt (ARRAY_REF, $1, $3); }
1286         | parm_declarator '[' ']'  %prec '.'
1287                 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1288         | '*' type_quals parm_declarator  %prec UNARY
1289                 { $$ = make_pointer_declarator ($2, $3); }
1290         /* ??? Yuck.  setattrs is a quick hack.  We can't use
1291            prefix_attributes because $1 only applies to this
1292            declarator.  We assume setspecs has already been done.
1293            setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1294            attributes could be recognized here or in `attributes').  */
1295         | attributes setattrs parm_declarator
1296                 { $$ = $3; }
1297         | TYPENAME
1298         ;
1299
1300 /* A declarator allowed whether or not there has been
1301    an explicit typespec.  These cannot redeclare a typedef-name.  */
1302
1303 notype_declarator:
1304           notype_declarator '(' parmlist_or_identifiers  %prec '.'
1305                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1306 /*      | notype_declarator '(' error ')'  %prec '.'
1307                 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1308                   poplevel (0, 0, 0); }  */
1309         | '(' notype_declarator ')'
1310                 { $$ = $2; }
1311         | '*' type_quals notype_declarator  %prec UNARY
1312                 { $$ = make_pointer_declarator ($2, $3); }
1313 ifc
1314         | notype_declarator '[' '*' ']'  %prec '.'
1315                 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1316                   if (! flag_isoc99)
1317                     error ("`[*]' in parameter declaration only allowed in ISO C 99");
1318                 }
1319 end ifc
1320         | notype_declarator '[' expr ']'  %prec '.'
1321                 { $$ = build_nt (ARRAY_REF, $1, $3); }
1322         | notype_declarator '[' ']'  %prec '.'
1323                 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1324         /* ??? Yuck.  setattrs is a quick hack.  We can't use
1325            prefix_attributes because $1 only applies to this
1326            declarator.  We assume setspecs has already been done.
1327            setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1328            attributes could be recognized here or in `attributes').  */
1329         | attributes setattrs notype_declarator
1330                 { $$ = $3; }
1331         | IDENTIFIER
1332         ;
1333
1334 struct_head:
1335           STRUCT
1336                 { $$ = NULL_TREE; }
1337         | STRUCT attributes
1338                 { $$ = $2; }
1339         ;
1340
1341 union_head:
1342           UNION
1343                 { $$ = NULL_TREE; }
1344         | UNION attributes
1345                 { $$ = $2; }
1346         ;
1347
1348 enum_head:
1349           ENUM
1350                 { $$ = NULL_TREE; }
1351         | ENUM attributes
1352                 { $$ = $2; }
1353         ;
1354
1355 structsp:
1356           struct_head identifier '{'
1357                 { $$ = start_struct (RECORD_TYPE, $2);
1358                   /* Start scope of tag before parsing components.  */
1359                 }
1360           component_decl_list '}' maybe_attribute
1361                 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1362         | struct_head '{' component_decl_list '}' maybe_attribute
1363                 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1364                                       $3, chainon ($1, $5));
1365                 }
1366         | struct_head identifier
1367                 { $$ = xref_tag (RECORD_TYPE, $2); }
1368         | union_head identifier '{'
1369                 { $$ = start_struct (UNION_TYPE, $2); }
1370           component_decl_list '}' maybe_attribute
1371                 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1372         | union_head '{' component_decl_list '}' maybe_attribute
1373                 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1374                                       $3, chainon ($1, $5));
1375                 }
1376         | union_head identifier
1377                 { $$ = xref_tag (UNION_TYPE, $2); }
1378         | enum_head identifier '{'
1379                 { $$ = start_enum ($2); }
1380           enumlist maybecomma_warn '}' maybe_attribute
1381                 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1382                                     chainon ($1, $8)); }
1383         | enum_head '{'
1384                 { $$ = start_enum (NULL_TREE); }
1385           enumlist maybecomma_warn '}' maybe_attribute
1386                 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1387                                     chainon ($1, $7)); }
1388         | enum_head identifier
1389                 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1390         ;
1391
1392 maybecomma:
1393           /* empty */
1394         | ','
1395         ;
1396
1397 maybecomma_warn:
1398           /* empty */
1399         | ','
1400                 { if (pedantic && ! flag_isoc99)
1401                     pedwarn ("comma at end of enumerator list"); }
1402         ;
1403
1404 component_decl_list:
1405           component_decl_list2
1406                 { $$ = $1; }
1407         | component_decl_list2 component_decl
1408                 { $$ = chainon ($1, $2);
1409                   pedwarn ("no semicolon at end of struct or union"); }
1410         ;
1411
1412 component_decl_list2:   /* empty */
1413                 { $$ = NULL_TREE; }
1414         | component_decl_list2 component_decl ';'
1415                 { $$ = chainon ($1, $2); }
1416         | component_decl_list2 ';'
1417                 { if (pedantic)
1418                     pedwarn ("extra semicolon in struct or union specified"); }
1419 ifobjc
1420         /* foo(sizeof(struct{ @defs(ClassName)})); */
1421         | DEFS '(' CLASSNAME ')'
1422                 {
1423                   tree interface = lookup_interface ($3);
1424
1425                   if (interface)
1426                     $$ = get_class_ivars (interface);
1427                   else
1428                     {
1429                       error ("Cannot find interface declaration for `%s'",
1430                              IDENTIFIER_POINTER ($3));
1431                       $$ = NULL_TREE;
1432                     }
1433                 }
1434 end ifobjc
1435         ;
1436
1437 /* There is a shift-reduce conflict here, because `components' may
1438    start with a `typename'.  It happens that shifting (the default resolution)
1439    does the right thing, because it treats the `typename' as part of
1440    a `typed_typespecs'.
1441
1442    It is possible that this same technique would allow the distinction
1443    between `notype_initdecls' and `initdecls' to be eliminated.
1444    But I am being cautious and not trying it.  */
1445
1446 component_decl:
1447           typed_typespecs setspecs components
1448                 { $$ = $3;
1449                   current_declspecs = TREE_VALUE (declspec_stack);
1450                   prefix_attributes = TREE_PURPOSE (declspec_stack);
1451                   declspec_stack = TREE_CHAIN (declspec_stack); }
1452         | typed_typespecs setspecs save_filename save_lineno maybe_attribute
1453                 {
1454                   /* Support for unnamed structs or unions as members of
1455                      structs or unions (which is [a] useful and [b] supports
1456                      MS P-SDK).  */
1457                   if (pedantic)
1458                     pedwarn ("ISO C doesn't support unnamed structs/unions");
1459
1460                   $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1461                   current_declspecs = TREE_VALUE (declspec_stack);
1462                   prefix_attributes = TREE_PURPOSE (declspec_stack);
1463                   declspec_stack = TREE_CHAIN (declspec_stack);
1464                 }
1465     | nonempty_type_quals setspecs components
1466                 { $$ = $3;
1467                   current_declspecs = TREE_VALUE (declspec_stack);
1468                   prefix_attributes = TREE_PURPOSE (declspec_stack);
1469                   declspec_stack = TREE_CHAIN (declspec_stack); }
1470         | nonempty_type_quals
1471                 { if (pedantic)
1472                     pedwarn ("ISO C forbids member declarations with no members");
1473                   shadow_tag($1);
1474                   $$ = NULL_TREE; }
1475         | error
1476                 { $$ = NULL_TREE; }
1477         | extension component_decl
1478                 { $$ = $2;
1479                   RESTORE_WARN_FLAGS ($1); }
1480         ;
1481
1482 components:
1483           component_declarator
1484         | components ',' component_declarator
1485                 { $$ = chainon ($1, $3); }
1486         ;
1487
1488 component_declarator:
1489           save_filename save_lineno declarator maybe_attribute
1490                 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1491                   decl_attributes ($$, $4, prefix_attributes); }
1492         | save_filename save_lineno
1493           declarator ':' expr_no_commas maybe_attribute
1494                 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1495                   decl_attributes ($$, $6, prefix_attributes); }
1496         | save_filename save_lineno ':' expr_no_commas maybe_attribute
1497                 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1498                   decl_attributes ($$, $5, prefix_attributes); }
1499         ;
1500
1501 /* We chain the enumerators in reverse order.
1502    They are put in forward order where enumlist is used.
1503    (The order used to be significant, but no longer is so.
1504    However, we still maintain the order, just to be clean.)  */
1505
1506 enumlist:
1507           enumerator
1508         | enumlist ',' enumerator
1509                 { if ($1 == error_mark_node)
1510                     $$ = $1;
1511                   else
1512                     $$ = chainon ($3, $1); }
1513         | error
1514                 { $$ = error_mark_node; }
1515         ;
1516
1517
1518 enumerator:
1519           identifier
1520                 { $$ = build_enumerator ($1, NULL_TREE); }
1521         | identifier '=' expr_no_commas
1522                 { $$ = build_enumerator ($1, $3); }
1523         ;
1524
1525 typename:
1526         typed_typespecs absdcl
1527                 { $$ = build_tree_list ($1, $2); }
1528         | nonempty_type_quals absdcl
1529                 { $$ = build_tree_list ($1, $2); }
1530         ;
1531
1532 absdcl:   /* an absolute declarator */
1533         /* empty */
1534                 { $$ = NULL_TREE; }
1535         | absdcl1
1536         ;
1537
1538 nonempty_type_quals:
1539           TYPE_QUAL
1540                 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1541         | nonempty_type_quals TYPE_QUAL
1542                 { $$ = tree_cons (NULL_TREE, $2, $1); }
1543         ;
1544
1545 type_quals:
1546           /* empty */
1547                 { $$ = NULL_TREE; }
1548         | type_quals TYPE_QUAL
1549                 { $$ = tree_cons (NULL_TREE, $2, $1); }
1550         ;
1551
1552 absdcl1:  /* a nonempty absolute declarator */
1553           '(' absdcl1 ')'
1554                 { $$ = $2; }
1555           /* `(typedef)1' is `int'.  */
1556         | '*' type_quals absdcl1  %prec UNARY
1557                 { $$ = make_pointer_declarator ($2, $3); }
1558         | '*' type_quals  %prec UNARY
1559                 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1560         | absdcl1 '(' parmlist  %prec '.'
1561                 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1562         | absdcl1 '[' expr ']'  %prec '.'
1563                 { $$ = build_nt (ARRAY_REF, $1, $3); }
1564         | absdcl1 '[' ']'  %prec '.'
1565                 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1566         | '(' parmlist  %prec '.'
1567                 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1568         | '[' expr ']'  %prec '.'
1569                 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1570         | '[' ']'  %prec '.'
1571                 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1572         /* ??? It appears we have to support attributes here, however
1573            using prefix_attributes is wrong.  */
1574         | attributes setattrs absdcl1
1575                 { $$ = $3; }
1576         ;
1577
1578 /* at least one statement, the first of which parses without error.  */
1579 /* stmts is used only after decls, so an invalid first statement
1580    is actually regarded as an invalid decl and part of the decls.  */
1581
1582 stmts:
1583         lineno_stmt_or_labels
1584                 {
1585                   if (pedantic && $1)
1586                     pedwarn ("ISO C forbids label at end of compound statement");
1587                 }
1588         ;
1589
1590 lineno_stmt_or_labels:
1591           lineno_stmt_or_label
1592         | lineno_stmt_or_labels lineno_stmt_or_label
1593                 { $$ = $2; }
1594         | lineno_stmt_or_labels errstmt
1595                 { $$ = 0; }
1596         ;
1597
1598 xstmts:
1599         /* empty */
1600         | stmts
1601         ;
1602
1603 errstmt:  error ';'
1604         ;
1605
1606 pushlevel:  /* empty */
1607                 { emit_line_note (input_filename, lineno);
1608                   pushlevel (0);
1609                   clear_last_expr ();
1610                   expand_start_bindings (0);
1611 ifobjc
1612                   if (objc_method_context)
1613                     add_objc_decls ();
1614 end ifobjc
1615                 }
1616         ;
1617
1618 /* Read zero or more forward-declarations for labels
1619    that nested functions can jump to.  */
1620 maybe_label_decls:
1621           /* empty */
1622         | label_decls
1623                 { if (pedantic)
1624                     pedwarn ("ISO C forbids label declarations"); }
1625         ;
1626
1627 label_decls:
1628           label_decl
1629         | label_decls label_decl
1630         ;
1631
1632 label_decl:
1633           LABEL identifiers_or_typenames ';'
1634                 { tree link;
1635                   for (link = $2; link; link = TREE_CHAIN (link))
1636                     {
1637                       tree label = shadow_label (TREE_VALUE (link));
1638                       C_DECLARED_LABEL_FLAG (label) = 1;
1639                       declare_nonlocal_label (label);
1640                     }
1641                 }
1642         ;
1643
1644 /* This is the body of a function definition.
1645    It causes syntax errors to ignore to the next openbrace.  */
1646 compstmt_or_error:
1647           compstmt
1648                 {}
1649         | error compstmt
1650         ;
1651
1652 compstmt_start: '{' { compstmt_count++; }
1653
1654 compstmt_nostart: '}'
1655                 { $$ = convert (void_type_node, integer_zero_node); }
1656         | pushlevel maybe_label_decls decls xstmts '}'
1657                 { emit_line_note (input_filename, lineno);
1658                   expand_end_bindings (getdecls (), 1, 0);
1659                   $$ = poplevel (1, 1, 0); }
1660         | pushlevel maybe_label_decls error '}'
1661                 { emit_line_note (input_filename, lineno);
1662                   expand_end_bindings (getdecls (), kept_level_p (), 0);
1663                   $$ = poplevel (kept_level_p (), 0, 0); }
1664         | pushlevel maybe_label_decls stmts '}'
1665                 { emit_line_note (input_filename, lineno);
1666                   expand_end_bindings (getdecls (), kept_level_p (), 0);
1667                   $$ = poplevel (kept_level_p (), 0, 0); }
1668         ;
1669
1670 compstmt_primary_start:
1671         '(' '{'
1672                 { if (current_function_decl == 0)
1673                     {
1674                       error ("braced-group within expression allowed only inside a function");
1675                       YYERROR;
1676                     }
1677                   /* We must force a BLOCK for this level
1678                      so that, if it is not expanded later,
1679                      there is a way to turn off the entire subtree of blocks
1680                      that are contained in it.  */
1681                   keep_next_level ();
1682                   push_label_level ();
1683                   $$ = expand_start_stmt_expr ();
1684                   compstmt_count++;
1685                 }
1686
1687 compstmt: compstmt_start compstmt_nostart
1688                 { $$ = $2; }
1689         ;
1690
1691 /* Value is number of statements counted as of the closeparen.  */
1692 simple_if:
1693           if_prefix lineno_labeled_stmt
1694 /* Make sure c_expand_end_cond is run once
1695    for each call to c_expand_start_cond.
1696    Otherwise a crash is likely.  */
1697         | if_prefix error
1698         ;
1699
1700 if_prefix:
1701           IF '(' expr ')'
1702                 { emit_line_note ($<filename>-1, $<lineno>0);
1703                   c_expand_start_cond (truthvalue_conversion ($3), 0,
1704                                        compstmt_count);
1705                   $<itype>$ = stmt_count;
1706                   if_stmt_file = $<filename>-1;
1707                   if_stmt_line = $<lineno>0; }
1708         ;
1709
1710 /* This is a subroutine of stmt.
1711    It is used twice, once for valid DO statements
1712    and once for catching errors in parsing the end test.  */
1713 do_stmt_start:
1714           DO
1715                 { stmt_count++;
1716                   compstmt_count++;
1717                   emit_line_note ($<filename>-1, $<lineno>0);
1718                   /* See comment in `while' alternative, above.  */
1719                   emit_nop ();
1720                   expand_start_loop_continue_elsewhere (1); }
1721           lineno_labeled_stmt WHILE
1722                 { expand_loop_continue_here (); }
1723         ;
1724
1725 /* The forced readahead in here is because we might be at the end of a
1726    line, and the line and file won't be bumped until yylex absorbs the
1727    first token on the next line.  */
1728 save_filename:
1729                 { if (yychar == YYEMPTY)
1730                     yychar = YYLEX;
1731                   $$ = input_filename; }
1732         ;
1733
1734 save_lineno:
1735                 { if (yychar == YYEMPTY)
1736                     yychar = YYLEX;
1737                   $$ = lineno; }
1738         ;
1739
1740 lineno_labeled_stmt:
1741           save_filename save_lineno stmt
1742                 { }
1743 /*      | save_filename save_lineno error
1744                 { }
1745 */
1746         | save_filename save_lineno label lineno_labeled_stmt
1747                 { }
1748         ;
1749
1750 lineno_stmt_or_label:
1751           save_filename save_lineno stmt_or_label
1752                 { $$ = $3; }
1753         ;
1754
1755 stmt_or_label:
1756           stmt
1757                 { $$ = 0; }
1758         | label
1759                 { $$ = 1; }
1760         ;
1761
1762 /* Parse a single real statement, not including any labels.  */
1763 stmt:
1764           compstmt
1765                 { stmt_count++; }
1766         | expr ';'
1767                 { stmt_count++;
1768                   emit_line_note ($<filename>-1, $<lineno>0);
1769 /* It appears that this should not be done--that a non-lvalue array
1770    shouldn't get an error if the value isn't used.
1771    Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1772    if it appears as a top-level expression,
1773    but says nothing about non-lvalue arrays.  */
1774 #if 0
1775                   /* Call default_conversion to get an error
1776                      on referring to a register array if pedantic.  */
1777                   if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1778                       || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1779                     $1 = default_conversion ($1);
1780 #endif
1781                   expand_expr_stmt ($1); }
1782         | simple_if ELSE
1783                 { c_expand_start_else ();
1784                   $<itype>1 = stmt_count; }
1785           lineno_labeled_stmt
1786                 { c_expand_end_cond ();
1787                   if (extra_warnings && stmt_count == $<itype>1)
1788                     warning ("empty body in an else-statement"); }
1789         | simple_if %prec IF
1790                 { c_expand_end_cond ();
1791                   /* This warning is here instead of in simple_if, because we
1792                      do not want a warning if an empty if is followed by an
1793                      else statement.  Increment stmt_count so we don't
1794                      give a second error if this is a nested `if'.  */
1795                   if (extra_warnings && stmt_count++ == $<itype>1)
1796                     warning_with_file_and_line (if_stmt_file, if_stmt_line,
1797                                                 "empty body in an if-statement"); }
1798 /* Make sure c_expand_end_cond is run once
1799    for each call to c_expand_start_cond.
1800    Otherwise a crash is likely.  */
1801         | simple_if ELSE error
1802                 { c_expand_end_cond (); }
1803         | WHILE
1804                 { stmt_count++;
1805                   emit_line_note ($<filename>-1, $<lineno>0);
1806                   /* The emit_nop used to come before emit_line_note,
1807                      but that made the nop seem like part of the preceding line.
1808                      And that was confusing when the preceding line was
1809                      inside of an if statement and was not really executed.
1810                      I think it ought to work to put the nop after the line number.
1811                      We will see.  --rms, July 15, 1991.  */
1812                   emit_nop (); }
1813           '(' expr ')'
1814                 { /* Don't start the loop till we have succeeded
1815                      in parsing the end test.  This is to make sure
1816                      that we end every loop we start.  */
1817                   expand_start_loop (1);
1818                   emit_line_note (input_filename, lineno);
1819                   expand_exit_loop_if_false (NULL_PTR,
1820                                              truthvalue_conversion ($4)); }
1821           lineno_labeled_stmt
1822                 { expand_end_loop (); }
1823         | do_stmt_start
1824           '(' expr ')' ';'
1825                 { emit_line_note (input_filename, lineno);
1826                   expand_exit_loop_if_false (NULL_PTR,
1827                                              truthvalue_conversion ($3));
1828                   expand_end_loop (); }
1829 /* This rule is needed to make sure we end every loop we start.  */
1830         | do_stmt_start error
1831                 { expand_end_loop (); }
1832         | FOR
1833           '(' xexpr ';'
1834                 { stmt_count++;
1835                   emit_line_note ($<filename>-1, $<lineno>0);
1836                   /* See comment in `while' alternative, above.  */
1837                   emit_nop ();
1838                   if ($3) c_expand_expr_stmt ($3);
1839                   /* Next step is to call expand_start_loop_continue_elsewhere,
1840                      but wait till after we parse the entire for (...).
1841                      Otherwise, invalid input might cause us to call that
1842                      fn without calling expand_end_loop.  */
1843                 }
1844           xexpr ';'
1845                 /* Can't emit now; wait till after expand_start_loop...  */
1846                 { $<lineno>7 = lineno;
1847                   $<filename>$ = input_filename; }
1848           xexpr ')'
1849                 {
1850                   /* Start the loop.  Doing this after parsing
1851                      all the expressions ensures we will end the loop.  */
1852                   expand_start_loop_continue_elsewhere (1);
1853                   /* Emit the end-test, with a line number.  */
1854                   emit_line_note ($<filename>8, $<lineno>7);
1855                   if ($6)
1856                     expand_exit_loop_if_false (NULL_PTR,
1857                                                truthvalue_conversion ($6));
1858                   $<lineno>7 = lineno;
1859                   $<filename>8 = input_filename; }
1860           lineno_labeled_stmt
1861                 { /* Emit the increment expression, with a line number.  */
1862                   emit_line_note ($<filename>8, $<lineno>7);
1863                   expand_loop_continue_here ();
1864                   if ($9)
1865                     c_expand_expr_stmt ($9);
1866                   expand_end_loop (); }
1867         | SWITCH '(' expr ')'
1868                 { stmt_count++;
1869                   emit_line_note ($<filename>-1, $<lineno>0);
1870                   c_expand_start_case ($3); }
1871           lineno_labeled_stmt
1872                 { expand_end_case ($3); }
1873         | BREAK ';'
1874                 { build_break_stmt ();
1875                   stmt_count++;
1876                   genrtl_break_stmt (); }
1877         | CONTINUE ';'
1878                 { build_continue_stmt ();
1879                   stmt_count++;
1880                   genrtl_continue_stmt (); }
1881         | RETURN ';'
1882                 { stmt_count++;
1883                   c_expand_return (NULL_TREE); }
1884         | RETURN expr ';'
1885                 { stmt_count++;
1886                   c_expand_return ($2); }
1887         | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1888                 { stmt_count++;
1889                   emit_line_note ($<filename>-1, $<lineno>0);
1890                   STRIP_NOPS ($4);
1891                   if ((TREE_CODE ($4) == ADDR_EXPR
1892                        && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1893                       || TREE_CODE ($4) == STRING_CST)
1894                     expand_asm ($4);
1895                   else
1896                     error ("argument of `asm' is not a constant string"); }
1897         /* This is the case with just output operands.  */
1898         | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1899                 { stmt_count++;
1900                   emit_line_note ($<filename>-1, $<lineno>0);
1901                   c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1902                                          $2 == ridpointers[(int)RID_VOLATILE],
1903                                          input_filename, lineno); }
1904         /* This is the case with input operands as well.  */
1905         | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1906                 { stmt_count++;
1907                   emit_line_note ($<filename>-1, $<lineno>0);
1908                   c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1909                                          $2 == ridpointers[(int)RID_VOLATILE],
1910                                          input_filename, lineno); }
1911         /* This is the case with clobbered registers as well.  */
1912         | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1913           asm_operands ':' asm_clobbers ')' ';'
1914                 { stmt_count++;
1915                   emit_line_note ($<filename>-1, $<lineno>0);
1916                   c_expand_asm_operands ($4, $6, $8, $10,
1917                                          $2 == ridpointers[(int)RID_VOLATILE],
1918                                          input_filename, lineno); }
1919         | GOTO identifier ';'
1920                 { tree decl;
1921                   stmt_count++;
1922                   emit_line_note ($<filename>-1, $<lineno>0);
1923                   decl = lookup_label ($2);
1924                   if (decl != 0)
1925                     {
1926                       TREE_USED (decl) = 1;
1927                       expand_goto (decl);
1928                     }
1929                 }
1930         | GOTO '*' expr ';'
1931                 { if (pedantic)
1932                     pedwarn ("ISO C forbids `goto *expr;'");
1933                   stmt_count++;
1934                   emit_line_note ($<filename>-1, $<lineno>0);
1935                   expand_computed_goto (convert (ptr_type_node, $3)); }
1936         | ';'
1937         ;
1938
1939 /* Any kind of label, including jump labels and case labels.
1940    ANSI C accepts labels only before statements, but we allow them
1941    also at the end of a compound statement.  */
1942
1943 label:    CASE expr_no_commas ':'
1944                 { stmt_count++;
1945                   do_case ($2, NULL_TREE); }
1946         | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
1947                 { stmt_count++;
1948                   do_case ($2, $4); }
1949         | DEFAULT ':'
1950                 { stmt_count++;
1951                   do_case (NULL_TREE, NULL_TREE); }
1952         | identifier save_filename save_lineno ':' maybe_attribute
1953                 { tree label = define_label ($2, $3, $1);
1954                   stmt_count++;
1955                   emit_nop ();
1956                   if (label)
1957                     {
1958                       expand_label (label);
1959                       decl_attributes (label, $5, NULL_TREE);
1960                     }
1961                 }
1962         ;
1963
1964 /* Either a type-qualifier or nothing.  First thing in an `asm' statement.  */
1965
1966 maybe_type_qual:
1967         /* empty */
1968                 { emit_line_note (input_filename, lineno);
1969                   $$ = NULL_TREE; }
1970         | TYPE_QUAL
1971                 { emit_line_note (input_filename, lineno); }
1972         ;
1973
1974 xexpr:
1975         /* empty */
1976                 { $$ = NULL_TREE; }
1977         | expr
1978         ;
1979
1980 /* These are the operands other than the first string and colon
1981    in  asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x))  */
1982 asm_operands: /* empty */
1983                 { $$ = NULL_TREE; }
1984         | nonnull_asm_operands
1985         ;
1986
1987 nonnull_asm_operands:
1988           asm_operand
1989         | nonnull_asm_operands ',' asm_operand
1990                 { $$ = chainon ($1, $3); }
1991         ;
1992
1993 asm_operand:
1994           STRING '(' expr ')'
1995                 { $$ = build_tree_list ($1, $3); }
1996         ;
1997
1998 asm_clobbers:
1999           string
2000                 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2001         | asm_clobbers ',' string
2002                 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2003         ;
2004 \f
2005 /* This is what appears inside the parens in a function declarator.
2006    Its value is a list of ..._TYPE nodes.  */
2007 parmlist:
2008                 { pushlevel (0);
2009                   clear_parm_order ();
2010                   declare_parm_level (0); }
2011           parmlist_1
2012                 { $$ = $2;
2013                   parmlist_tags_warning ();
2014                   poplevel (0, 0, 0); }
2015         ;
2016
2017 parmlist_1:
2018           parmlist_2 ')'
2019         | parms ';'
2020                 { tree parm;
2021                   if (pedantic)
2022                     pedwarn ("ISO C forbids forward parameter declarations");
2023                   /* Mark the forward decls as such.  */
2024                   for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2025                     TREE_ASM_WRITTEN (parm) = 1;
2026                   clear_parm_order (); }
2027           parmlist_1
2028                 { $$ = $4; }
2029         | error ')'
2030                 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2031         ;
2032
2033 /* This is what appears inside the parens in a function declarator.
2034    Is value is represented in the format that grokdeclarator expects.  */
2035 parmlist_2:  /* empty */
2036                 { $$ = get_parm_info (0); }
2037         | ELLIPSIS
2038                 { $$ = get_parm_info (0);
2039                   /* Gcc used to allow this as an extension.  However, it does
2040                      not work for all targets, and thus has been disabled.
2041                      Also, since func (...) and func () are indistinguishable,
2042                      it caused problems with the code in expand_builtin which
2043                      tries to verify that BUILT_IN_NEXT_ARG is being used
2044                      correctly.  */
2045                   error ("ISO C requires a named argument before `...'");
2046                 }
2047         | parms
2048                 { $$ = get_parm_info (1); }
2049         | parms ',' ELLIPSIS
2050                 { $$ = get_parm_info (0); }
2051         ;
2052
2053 parms:
2054         parm
2055                 { push_parm_decl ($1); }
2056         | parms ',' parm
2057                 { push_parm_decl ($3); }
2058         ;
2059
2060 /* A single parameter declaration or parameter type name,
2061    as found in a parmlist.  */
2062 parm:
2063           typed_declspecs setspecs parm_declarator maybe_attribute
2064                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2065                                                          $3),
2066                                         build_tree_list (prefix_attributes,
2067                                                          $4));
2068                   current_declspecs = TREE_VALUE (declspec_stack);
2069                   prefix_attributes = TREE_PURPOSE (declspec_stack);
2070                   declspec_stack = TREE_CHAIN (declspec_stack); }
2071         | typed_declspecs setspecs notype_declarator maybe_attribute
2072                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2073                                                          $3),
2074                                         build_tree_list (prefix_attributes,
2075                                                          $4));
2076                   current_declspecs = TREE_VALUE (declspec_stack);
2077                   prefix_attributes = TREE_PURPOSE (declspec_stack);
2078                   declspec_stack = TREE_CHAIN (declspec_stack); }
2079         | typed_declspecs setspecs absdcl maybe_attribute
2080                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2081                                                          $3),
2082                                         build_tree_list (prefix_attributes,
2083                                                          $4));
2084                   current_declspecs = TREE_VALUE (declspec_stack);
2085                   prefix_attributes = TREE_PURPOSE (declspec_stack);
2086                   declspec_stack = TREE_CHAIN (declspec_stack); }
2087         | declmods setspecs notype_declarator maybe_attribute
2088                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2089                                                          $3),
2090                                         build_tree_list (prefix_attributes,
2091                                                          $4));
2092                   current_declspecs = TREE_VALUE (declspec_stack);
2093                   prefix_attributes = TREE_PURPOSE (declspec_stack);
2094                   declspec_stack = TREE_CHAIN (declspec_stack); }
2095
2096         | declmods setspecs absdcl maybe_attribute
2097                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2098                                                          $3),
2099                                         build_tree_list (prefix_attributes,
2100                                                          $4));
2101                   current_declspecs = TREE_VALUE (declspec_stack);
2102                   prefix_attributes = TREE_PURPOSE (declspec_stack);
2103                   declspec_stack = TREE_CHAIN (declspec_stack); }
2104         ;
2105
2106 /* This is used in a function definition
2107    where either a parmlist or an identifier list is ok.
2108    Its value is a list of ..._TYPE nodes or a list of identifiers.  */
2109 parmlist_or_identifiers:
2110                 { pushlevel (0);
2111                   clear_parm_order ();
2112                   declare_parm_level (1); }
2113           parmlist_or_identifiers_1
2114                 { $$ = $2;
2115                   parmlist_tags_warning ();
2116                   poplevel (0, 0, 0); }
2117         ;
2118
2119 parmlist_or_identifiers_1:
2120           parmlist_1
2121         | identifiers ')'
2122                 { tree t;
2123                   for (t = $1; t; t = TREE_CHAIN (t))
2124                     if (TREE_VALUE (t) == NULL_TREE)
2125                       error ("`...' in old-style identifier list");
2126                   $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2127         ;
2128
2129 /* A nonempty list of identifiers.  */
2130 identifiers:
2131         IDENTIFIER
2132                 { $$ = build_tree_list (NULL_TREE, $1); }
2133         | identifiers ',' IDENTIFIER
2134                 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2135         ;
2136
2137 /* A nonempty list of identifiers, including typenames.  */
2138 identifiers_or_typenames:
2139         identifier
2140                 { $$ = build_tree_list (NULL_TREE, $1); }
2141         | identifiers_or_typenames ',' identifier
2142                 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2143         ;
2144
2145 extension:
2146         EXTENSION
2147                 { $$ = SAVE_WARN_FLAGS();
2148                   pedantic = 0;
2149                   warn_pointer_arith = 0; }
2150         ;
2151 \f
2152 ifobjc
2153 /* Objective-C productions.  */
2154
2155 objcdef:
2156           classdef
2157         | classdecl
2158         | aliasdecl
2159         | protocoldef
2160         | methoddef
2161         | END
2162                 {
2163                   if (objc_implementation_context)
2164                     {
2165                       finish_class (objc_implementation_context);
2166                       objc_ivar_chain = NULL_TREE;
2167                       objc_implementation_context = NULL_TREE;
2168                     }
2169                   else
2170                     warning ("`@end' must appear in an implementation context");
2171                 }
2172         ;
2173
2174 /* A nonempty list of identifiers.  */
2175 identifier_list:
2176         identifier
2177                 { $$ = build_tree_list (NULL_TREE, $1); }
2178         | identifier_list ',' identifier
2179                 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2180         ;
2181
2182 classdecl:
2183           CLASS identifier_list ';'
2184                 {
2185                   objc_declare_class ($2);
2186                 }
2187
2188 aliasdecl:
2189           ALIAS identifier identifier ';'
2190                 {
2191                   objc_declare_alias ($2, $3);
2192                 }
2193
2194 classdef:
2195           INTERFACE identifier protocolrefs '{'
2196                 {
2197                   objc_interface_context = objc_ivar_context
2198                     = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2199                   objc_public_flag = 0;
2200                 }
2201           ivar_decl_list '}'
2202                 {
2203                   continue_class (objc_interface_context);
2204                 }
2205           methodprotolist
2206           END
2207                 {
2208                   finish_class (objc_interface_context);
2209                   objc_interface_context = NULL_TREE;
2210                 }
2211
2212         | INTERFACE identifier protocolrefs
2213                 {
2214                   objc_interface_context
2215                     = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2216                   continue_class (objc_interface_context);
2217                 }
2218           methodprotolist
2219           END
2220                 {
2221                   finish_class (objc_interface_context);
2222                   objc_interface_context = NULL_TREE;
2223                 }
2224
2225         | INTERFACE identifier ':' identifier protocolrefs '{'
2226                 {
2227                   objc_interface_context = objc_ivar_context
2228                     = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2229                   objc_public_flag = 0;
2230                 }
2231           ivar_decl_list '}'
2232                 {
2233                   continue_class (objc_interface_context);
2234                 }
2235           methodprotolist
2236           END
2237                 {
2238                   finish_class (objc_interface_context);
2239                   objc_interface_context = NULL_TREE;
2240                 }
2241
2242         | INTERFACE identifier ':' identifier protocolrefs
2243                 {
2244                   objc_interface_context
2245                     = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2246                   continue_class (objc_interface_context);
2247                 }
2248           methodprotolist
2249           END
2250                 {
2251                   finish_class (objc_interface_context);
2252                   objc_interface_context = NULL_TREE;
2253                 }
2254
2255         | IMPLEMENTATION identifier '{'
2256                 {
2257                   objc_implementation_context = objc_ivar_context
2258                     = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2259                   objc_public_flag = 0;
2260                 }
2261           ivar_decl_list '}'
2262                 {
2263                   objc_ivar_chain
2264                     = continue_class (objc_implementation_context);
2265                 }
2266
2267         | IMPLEMENTATION identifier
2268                 {
2269                   objc_implementation_context
2270                     = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2271                   objc_ivar_chain
2272                     = continue_class (objc_implementation_context);
2273                 }
2274
2275         | IMPLEMENTATION identifier ':' identifier '{'
2276                 {
2277                   objc_implementation_context = objc_ivar_context
2278                     = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2279                   objc_public_flag = 0;
2280                 }
2281           ivar_decl_list '}'
2282                 {
2283                   objc_ivar_chain
2284                     = continue_class (objc_implementation_context);
2285                 }
2286
2287         | IMPLEMENTATION identifier ':' identifier
2288                 {
2289                   objc_implementation_context
2290                     = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2291                   objc_ivar_chain
2292                     = continue_class (objc_implementation_context);
2293                 }
2294
2295         | INTERFACE identifier '(' identifier ')' protocolrefs
2296                 {
2297                   objc_interface_context
2298                     = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2299                   continue_class (objc_interface_context);
2300                 }
2301           methodprotolist
2302           END
2303                 {
2304                   finish_class (objc_interface_context);
2305                   objc_interface_context = NULL_TREE;
2306                 }
2307
2308         | IMPLEMENTATION identifier '(' identifier ')'
2309                 {
2310                   objc_implementation_context
2311                     = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2312                   objc_ivar_chain
2313                     = continue_class (objc_implementation_context);
2314                 }
2315         ;
2316
2317 protocoldef:
2318           PROTOCOL identifier protocolrefs
2319                 {
2320                   remember_protocol_qualifiers ();
2321                   objc_interface_context
2322                     = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2323                 }
2324           methodprotolist END
2325                 {
2326                   forget_protocol_qualifiers();
2327                   finish_protocol(objc_interface_context);
2328                   objc_interface_context = NULL_TREE;
2329                 }
2330         ;
2331
2332 protocolrefs:
2333           /* empty */
2334                 {
2335                   $$ = NULL_TREE;
2336                 }
2337         | non_empty_protocolrefs
2338         ;
2339
2340 non_empty_protocolrefs:
2341           ARITHCOMPARE identifier_list ARITHCOMPARE
2342                 {
2343                   if ($1 == LT_EXPR && $3 == GT_EXPR)
2344                     $$ = $2;
2345                   else
2346                     YYERROR1;
2347                 }
2348         ;
2349
2350 ivar_decl_list:
2351           ivar_decl_list visibility_spec ivar_decls
2352         | ivar_decls
2353         ;
2354
2355 visibility_spec:
2356           PRIVATE { objc_public_flag = 2; }
2357         | PROTECTED { objc_public_flag = 0; }
2358         | PUBLIC { objc_public_flag = 1; }
2359         ;
2360
2361 ivar_decls:
2362           /* empty */
2363                 {
2364                   $$ = NULL_TREE;
2365                 }
2366         | ivar_decls ivar_decl ';'
2367         | ivar_decls ';'
2368                 {
2369                   if (pedantic)
2370                     pedwarn ("extra semicolon in struct or union specified");
2371                 }
2372         ;
2373
2374
2375 /* There is a shift-reduce conflict here, because `components' may
2376    start with a `typename'.  It happens that shifting (the default resolution)
2377    does the right thing, because it treats the `typename' as part of
2378    a `typed_typespecs'.
2379
2380    It is possible that this same technique would allow the distinction
2381    between `notype_initdecls' and `initdecls' to be eliminated.
2382    But I am being cautious and not trying it.  */
2383
2384 ivar_decl:
2385         typed_typespecs setspecs ivars
2386                 { $$ = $3;
2387                   current_declspecs = TREE_VALUE (declspec_stack);
2388                   prefix_attributes = TREE_PURPOSE (declspec_stack);
2389                   declspec_stack = TREE_CHAIN (declspec_stack); }
2390         | nonempty_type_quals setspecs ivars
2391                 { $$ = $3;
2392                   current_declspecs = TREE_VALUE (declspec_stack);
2393                   prefix_attributes = TREE_PURPOSE (declspec_stack);
2394                   declspec_stack = TREE_CHAIN (declspec_stack); }
2395         | error
2396                 { $$ = NULL_TREE; }
2397         ;
2398
2399 ivars:
2400           /* empty */
2401                 { $$ = NULL_TREE; }
2402         | ivar_declarator
2403         | ivars ',' ivar_declarator
2404         ;
2405
2406 ivar_declarator:
2407           declarator
2408                 {
2409                   $$ = add_instance_variable (objc_ivar_context,
2410                                               objc_public_flag,
2411                                               $1, current_declspecs,
2412                                               NULL_TREE);
2413                 }
2414         | declarator ':' expr_no_commas
2415                 {
2416                   $$ = add_instance_variable (objc_ivar_context,
2417                                               objc_public_flag,
2418                                               $1, current_declspecs, $3);
2419                 }
2420         | ':' expr_no_commas
2421                 {
2422                   $$ = add_instance_variable (objc_ivar_context,
2423                                               objc_public_flag,
2424                                               NULL_TREE,
2425                                               current_declspecs, $2);
2426                 }
2427         ;
2428
2429 methoddef:
2430           '+'
2431                 {
2432                   remember_protocol_qualifiers ();
2433                   if (objc_implementation_context)
2434                     objc_inherit_code = CLASS_METHOD_DECL;
2435                   else
2436                     fatal ("method definition not in class context");
2437                 }
2438           methoddecl
2439                 {
2440                   forget_protocol_qualifiers ();
2441                   add_class_method (objc_implementation_context, $3);
2442                   start_method_def ($3);
2443                   objc_method_context = $3;
2444                 }
2445           optarglist
2446                 {
2447                   continue_method_def ();
2448                 }
2449           compstmt_or_error
2450                 {
2451                   finish_method_def ();
2452                   objc_method_context = NULL_TREE;
2453                 }
2454
2455         | '-'
2456                 {
2457                   remember_protocol_qualifiers ();
2458                   if (objc_implementation_context)
2459                     objc_inherit_code = INSTANCE_METHOD_DECL;
2460                   else
2461                     fatal ("method definition not in class context");
2462                 }
2463           methoddecl
2464                 {
2465                   forget_protocol_qualifiers ();
2466                   add_instance_method (objc_implementation_context, $3);
2467                   start_method_def ($3);
2468                   objc_method_context = $3;
2469                 }
2470           optarglist
2471                 {
2472                   continue_method_def ();
2473                 }
2474           compstmt_or_error
2475                 {
2476                   finish_method_def ();
2477                   objc_method_context = NULL_TREE;
2478                 }
2479         ;
2480
2481 /* the reason for the strange actions in this rule
2482  is so that notype_initdecls when reached via datadef
2483  can find a valid list of type and sc specs in $0. */
2484
2485 methodprotolist:
2486           /* empty  */
2487         | {$<ttype>$ = NULL_TREE; } methodprotolist2
2488         ;
2489
2490 methodprotolist2:                /* eliminates a shift/reduce conflict */
2491            methodproto
2492         |  datadef
2493         | methodprotolist2 methodproto
2494         | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2495         ;
2496
2497 semi_or_error:
2498           ';'
2499         | error
2500         ;
2501
2502 methodproto:
2503           '+'
2504                 {
2505                   /* Remember protocol qualifiers in prototypes.  */
2506                   remember_protocol_qualifiers ();
2507                   objc_inherit_code = CLASS_METHOD_DECL;
2508                 }
2509           methoddecl
2510                 {
2511                   /* Forget protocol qualifiers here.  */
2512                   forget_protocol_qualifiers ();
2513                   add_class_method (objc_interface_context, $3);
2514                 }
2515           semi_or_error
2516
2517         | '-'
2518                 {
2519                   /* Remember protocol qualifiers in prototypes.  */
2520                   remember_protocol_qualifiers ();
2521                   objc_inherit_code = INSTANCE_METHOD_DECL;
2522                 }
2523           methoddecl
2524                 {
2525                   /* Forget protocol qualifiers here.  */
2526                   forget_protocol_qualifiers ();
2527                   add_instance_method (objc_interface_context, $3);
2528                 }
2529           semi_or_error
2530         ;
2531
2532 methoddecl:
2533           '(' typename ')' unaryselector
2534                 {
2535                   $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2536                 }
2537
2538         | unaryselector
2539                 {
2540                   $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2541                 }
2542
2543         | '(' typename ')' keywordselector optparmlist
2544                 {
2545                   $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2546                 }
2547
2548         | keywordselector optparmlist
2549                 {
2550                   $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2551                 }
2552         ;
2553
2554 /* "optarglist" assumes that start_method_def has already been called...
2555    if it is not, the "xdecls" will not be placed in the proper scope */
2556
2557 optarglist:
2558           /* empty */
2559         | ';' myxdecls
2560         ;
2561
2562 /* to get around the following situation: "int foo (int a) int b; {}" that
2563    is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2564
2565 myxdecls:
2566           /* empty */
2567         | mydecls
2568         ;
2569
2570 mydecls:
2571         mydecl
2572         | errstmt
2573         | mydecls mydecl
2574         | mydecl errstmt
2575         ;
2576
2577 mydecl:
2578         typed_declspecs setspecs myparms ';'
2579                 { current_declspecs = TREE_VALUE (declspec_stack);
2580                   prefix_attributes = TREE_PURPOSE (declspec_stack);
2581                   declspec_stack = TREE_CHAIN (declspec_stack); }
2582         | typed_declspecs ';'
2583                 { shadow_tag ($1); }
2584         | declmods ';'
2585                 { pedwarn ("empty declaration"); }
2586         ;
2587
2588 myparms:
2589         myparm
2590                 { push_parm_decl ($1); }
2591         | myparms ',' myparm
2592                 { push_parm_decl ($3); }
2593         ;
2594
2595 /* A single parameter declaration or parameter type name,
2596    as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2597
2598 myparm:
2599           parm_declarator maybe_attribute
2600                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2601                                                          $1),
2602                                         build_tree_list (prefix_attributes,
2603                                                          $2)); }
2604         | notype_declarator maybe_attribute
2605                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2606                                                          $1),
2607                                         build_tree_list (prefix_attributes,
2608                                                          $2)); }
2609         | absdcl maybe_attribute
2610                 { $$ = build_tree_list (build_tree_list (current_declspecs,
2611                                                          $1),
2612                                         build_tree_list (prefix_attributes,
2613                                                          $2)); }
2614         ;
2615
2616 optparmlist:
2617           /* empty */
2618                 {
2619                   $$ = NULL_TREE;
2620                 }
2621         | ',' ELLIPSIS
2622                 {
2623                   /* oh what a kludge! */
2624                   $$ = objc_ellipsis_node;
2625                 }
2626         | ','
2627                 {
2628                   pushlevel (0);
2629                 }
2630           parmlist_2
2631                 {
2632                   /* returns a tree list node generated by get_parm_info */
2633                   $$ = $3;
2634                   poplevel (0, 0, 0);
2635                 }
2636         ;
2637
2638 unaryselector:
2639           selector
2640         ;
2641
2642 keywordselector:
2643           keyworddecl
2644
2645         | keywordselector keyworddecl
2646                 {
2647                   $$ = chainon ($1, $2);
2648                 }
2649         ;
2650
2651 selector:
2652           IDENTIFIER
2653         | TYPENAME
2654         | OBJECTNAME
2655         | reservedwords
2656         ;
2657
2658 reservedwords:
2659           ENUM | STRUCT | UNION | IF | ELSE | WHILE | DO | FOR
2660         | SWITCH | CASE | DEFAULT | BREAK | CONTINUE | RETURN
2661         | GOTO | ASM_KEYWORD | SIZEOF | TYPEOF | ALIGNOF
2662         | TYPESPEC | TYPE_QUAL
2663         ;
2664
2665 keyworddecl:
2666           selector ':' '(' typename ')' identifier
2667                 {
2668                   $$ = build_keyword_decl ($1, $4, $6);
2669                 }
2670
2671         | selector ':' identifier
2672                 {
2673                   $$ = build_keyword_decl ($1, NULL_TREE, $3);
2674                 }
2675
2676         | ':' '(' typename ')' identifier
2677                 {
2678                   $$ = build_keyword_decl (NULL_TREE, $3, $5);
2679                 }
2680
2681         | ':' identifier
2682                 {
2683                   $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2684                 }
2685         ;
2686
2687 messageargs:
2688           selector
2689         | keywordarglist
2690         ;
2691
2692 keywordarglist:
2693           keywordarg
2694         | keywordarglist keywordarg
2695                 {
2696                   $$ = chainon ($1, $2);
2697                 }
2698         ;
2699
2700
2701 keywordexpr:
2702           nonnull_exprlist
2703                 {
2704                   if (TREE_CHAIN ($1) == NULL_TREE)
2705                     /* just return the expr., remove a level of indirection */
2706                     $$ = TREE_VALUE ($1);
2707                   else
2708                     /* we have a comma expr., we will collapse later */
2709                     $$ = $1;
2710                 }
2711         ;
2712
2713 keywordarg:
2714           selector ':' keywordexpr
2715                 {
2716                   $$ = build_tree_list ($1, $3);
2717                 }
2718         | ':' keywordexpr
2719                 {
2720                   $$ = build_tree_list (NULL_TREE, $2);
2721                 }
2722         ;
2723
2724 receiver:
2725           expr
2726         | CLASSNAME
2727                 {
2728                   $$ = get_class_reference ($1);
2729                 }
2730         ;
2731
2732 objcmessageexpr:
2733           '['
2734                 { objc_receiver_context = 1; }
2735           receiver
2736                 { objc_receiver_context = 0; }
2737           messageargs ']'
2738                 {
2739                   $$ = build_tree_list ($3, $5);
2740                 }
2741         ;
2742
2743 selectorarg:
2744           selector
2745         | keywordnamelist
2746         ;
2747
2748 keywordnamelist:
2749           keywordname
2750         | keywordnamelist keywordname
2751                 {
2752                   $$ = chainon ($1, $2);
2753                 }
2754         ;
2755
2756 keywordname:
2757           selector ':'
2758                 {
2759                   $$ = build_tree_list ($1, NULL_TREE);
2760                 }
2761         | ':'
2762                 {
2763                   $$ = build_tree_list (NULL_TREE, NULL_TREE);
2764                 }
2765         ;
2766
2767 objcselectorexpr:
2768           SELECTOR '(' selectorarg ')'
2769                 {
2770                   $$ = $3;
2771                 }
2772         ;
2773
2774 objcprotocolexpr:
2775           PROTOCOL '(' identifier ')'
2776                 {
2777                   $$ = $3;
2778                 }
2779         ;
2780
2781 /* extension to support C-structures in the archiver */
2782
2783 objcencodeexpr:
2784           ENCODE '(' typename ')'
2785                 {
2786                   $$ = groktypename ($3);
2787                 }
2788         ;
2789
2790 end ifobjc
2791 %%
2792
2793 /* yylex() is a thin wrapper around c_lex(), all it does is translate
2794    cpplib.h's token codes into yacc's token codes.  */
2795
2796 static enum cpp_ttype last_token;
2797 #if USE_CPPLIB
2798 extern cpp_reader parse_in;
2799 #endif
2800
2801 /* The reserved keyword table.  */
2802 struct resword
2803 {
2804   const char *word;
2805   ENUM_BITFIELD(rid) rid : 16;
2806   unsigned int disable   : 16;
2807 };
2808
2809 /* Disable mask.  Keywords are disabled if (reswords[i].disable & mask) is
2810    _true_.  */
2811 #define D_TRAD  0x01    /* not in traditional C */
2812 #define D_C89   0x02    /* not in C89 */
2813 #define D_EXT   0x04    /* GCC extension */
2814 #define D_EXT89 0x08    /* GCC extension incorporated in C99 */
2815 #define D_OBJC  0x10    /* Objective C only */
2816 #define D_YES   0x20    /* always starts disabled */
2817
2818 static const struct resword reswords[] =
2819 {
2820   { "_Complex",         RID_COMPLEX,    0 },
2821   { "__alignof",        RID_ALIGNOF,    0 },
2822   { "__alignof__",      RID_ALIGNOF,    0 },
2823   { "__asm",            RID_ASM,        0 },
2824   { "__asm__",          RID_ASM,        0 },
2825   { "__attribute",      RID_ATTRIBUTE,  0 },
2826   { "__attribute__",    RID_ATTRIBUTE,  0 },
2827   { "__bounded",        RID_BOUNDED,    0 },
2828   { "__bounded__",      RID_BOUNDED,    0 },
2829   { "__builtin_va_arg", RID_VA_ARG,     0 },
2830   { "__complex",        RID_COMPLEX,    0 },
2831   { "__complex__",      RID_COMPLEX,    0 },
2832   { "__const",          RID_CONST,      0 },
2833   { "__const__",        RID_CONST,      0 },
2834   { "__extension__",    RID_EXTENSION,  0 },
2835   { "__imag",           RID_IMAGPART,   0 },
2836   { "__imag__",         RID_IMAGPART,   0 },
2837   { "__inline",         RID_INLINE,     0 },
2838   { "__inline__",       RID_INLINE,     0 },
2839   { "__label__",        RID_LABEL,      0 },
2840   { "__ptrbase",        RID_PTRBASE,    0 },
2841   { "__ptrbase__",      RID_PTRBASE,    0 },
2842   { "__ptrextent",      RID_PTREXTENT,  0 },
2843   { "__ptrextent__",    RID_PTREXTENT,  0 },
2844   { "__ptrvalue",       RID_PTRVALUE,   0 },
2845   { "__ptrvalue__",     RID_PTRVALUE,   0 },
2846   { "__real",           RID_REALPART,   0 },
2847   { "__real__",         RID_REALPART,   0 },
2848   { "__restrict",       RID_RESTRICT,   0 },
2849   { "__restrict__",     RID_RESTRICT,   0 },
2850   { "__signed",         RID_SIGNED,     0 },
2851   { "__signed__",       RID_SIGNED,     0 },
2852   { "__typeof",         RID_TYPEOF,     0 },
2853   { "__typeof__",       RID_TYPEOF,     0 },
2854   { "__unbounded",      RID_UNBOUNDED,  0 },
2855   { "__unbounded__",    RID_UNBOUNDED,  0 },
2856   { "__volatile",       RID_VOLATILE,   0 },
2857   { "__volatile__",     RID_VOLATILE,   0 },
2858   { "asm",              RID_ASM,        D_EXT },
2859   { "auto",             RID_AUTO,       0 },
2860   { "break",            RID_BREAK,      0 },
2861   { "case",             RID_CASE,       0 },
2862   { "char",             RID_CHAR,       0 },
2863   { "const",            RID_CONST,      D_TRAD },
2864   { "continue",         RID_CONTINUE,   0 },
2865   { "default",          RID_DEFAULT,    0 },
2866   { "do",               RID_DO,         0 },
2867   { "double",           RID_DOUBLE,     0 },
2868   { "else",             RID_ELSE,       0 },
2869   { "enum",             RID_ENUM,       0 },
2870   { "extern",           RID_EXTERN,     0 },
2871   { "float",            RID_FLOAT,      0 },
2872   { "for",              RID_FOR,        0 },
2873   { "goto",             RID_GOTO,       0 },
2874   { "if",               RID_IF,         0 },
2875   { "inline",           RID_INLINE,     D_TRAD|D_EXT89 },
2876   { "int",              RID_INT,        0 },
2877   { "long",             RID_LONG,       0 },
2878   { "register",         RID_REGISTER,   0 },
2879   { "restrict",         RID_RESTRICT,   D_TRAD|D_C89 },
2880   { "return",           RID_RETURN,     0 },
2881   { "short",            RID_SHORT,      0 },
2882   { "signed",           RID_SIGNED,     D_TRAD },
2883   { "sizeof",           RID_SIZEOF,     0 },
2884   { "static",           RID_STATIC,     0 },
2885   { "struct",           RID_STRUCT,     0 },
2886   { "switch",           RID_SWITCH,     0 },
2887   { "typedef",          RID_TYPEDEF,    0 },
2888   { "typeof",           RID_TYPEOF,     D_TRAD|D_EXT },
2889   { "union",            RID_UNION,      0 },
2890   { "unsigned",         RID_UNSIGNED,   0 },
2891   { "void",             RID_VOID,       0 },
2892   { "volatile",         RID_VOLATILE,   D_TRAD },
2893   { "while",            RID_WHILE,      0 },
2894 ifobjc
2895   { "@class",           RID_AT_CLASS,           D_OBJC },
2896   { "@compatibility_alias", RID_AT_ALIAS,       D_OBJC },
2897   { "@defs",            RID_AT_DEFS,            D_OBJC },
2898   { "@encode",          RID_AT_ENCODE,          D_OBJC },
2899   { "@end",             RID_AT_END,             D_OBJC },
2900   { "@implementation",  RID_AT_IMPLEMENTATION,  D_OBJC },
2901   { "@interface",       RID_AT_INTERFACE,       D_OBJC },
2902   { "@private",         RID_AT_PRIVATE,         D_OBJC },
2903   { "@protected",       RID_AT_PROTECTED,       D_OBJC },
2904   { "@protocol",        RID_AT_PROTOCOL,        D_OBJC },
2905   { "@public",          RID_AT_PUBLIC,          D_OBJC },
2906   { "@selector",        RID_AT_SELECTOR,        D_OBJC },
2907   { "id",               RID_ID,                 D_OBJC },
2908   { "bycopy",           RID_BYCOPY,             D_OBJC|D_YES },
2909   { "byref",            RID_BYREF,              D_OBJC|D_YES },
2910   { "in",               RID_IN,                 D_OBJC|D_YES },
2911   { "inout",            RID_INOUT,              D_OBJC|D_YES },
2912   { "oneway",           RID_ONEWAY,             D_OBJC|D_YES },
2913   { "out",              RID_OUT,                D_OBJC|D_YES },
2914 end ifobjc
2915 };
2916 #define N_reswords (sizeof reswords / sizeof (struct resword))
2917
2918 /* Table mapping from RID_* constants to yacc token numbers.
2919    Unfortunately we have to have entries for all the keywords in all
2920    three languages.  */
2921 static const short rid_to_yy[RID_MAX] =
2922 {
2923   /* RID_STATIC */      SCSPEC,
2924   /* RID_UNSIGNED */    TYPESPEC,
2925   /* RID_LONG */        TYPESPEC,
2926   /* RID_CONST */       TYPE_QUAL,
2927   /* RID_EXTERN */      SCSPEC,
2928   /* RID_REGISTER */    SCSPEC,
2929   /* RID_TYPEDEF */     SCSPEC,
2930   /* RID_SHORT */       TYPESPEC,
2931   /* RID_INLINE */      SCSPEC,
2932   /* RID_VOLATILE */    TYPE_QUAL,
2933   /* RID_SIGNED */      TYPESPEC,
2934   /* RID_AUTO */        SCSPEC,
2935   /* RID_RESTRICT */    TYPE_QUAL,
2936
2937   /* C extensions */
2938   /* RID_BOUNDED */     TYPE_QUAL,
2939   /* RID_UNBOUNDED */   TYPE_QUAL,
2940   /* RID_COMPLEX */     TYPESPEC,
2941
2942   /* C++ */
2943   /* RID_FRIEND */      0,
2944   /* RID_VIRTUAL */     0,
2945   /* RID_EXPLICIT */    0,
2946   /* RID_EXPORT */      0,
2947   /* RID_MUTABLE */     0,
2948
2949   /* ObjC */
2950   /* RID_IN */          TYPE_QUAL,
2951   /* RID_OUT */         TYPE_QUAL,
2952   /* RID_INOUT */       TYPE_QUAL,
2953   /* RID_BYCOPY */      TYPE_QUAL,
2954   /* RID_BYREF */       TYPE_QUAL,
2955   /* RID_ONEWAY */      TYPE_QUAL,
2956
2957   /* C */
2958   /* RID_INT */         TYPESPEC,
2959   /* RID_CHAR */        TYPESPEC,
2960   /* RID_FLOAT */       TYPESPEC,
2961   /* RID_DOUBLE */      TYPESPEC,
2962   /* RID_VOID */        TYPESPEC,
2963   /* RID_ENUM */        ENUM,
2964   /* RID_STRUCT */      STRUCT,
2965   /* RID_UNION */       UNION,
2966   /* RID_IF */          IF,
2967   /* RID_ELSE */        ELSE,
2968   /* RID_WHILE */       WHILE,
2969   /* RID_DO */          DO,
2970   /* RID_FOR */         FOR,
2971   /* RID_SWITCH */      SWITCH,
2972   /* RID_CASE */        CASE,
2973   /* RID_DEFAULT */     DEFAULT,
2974   /* RID_BREAK */       BREAK,
2975   /* RID_CONTINUE */    CONTINUE,
2976   /* RID_RETURN */      RETURN,
2977   /* RID_GOTO */        GOTO,
2978   /* RID_SIZEOF */      SIZEOF,
2979
2980   /* C extensions */
2981   /* RID_ASM */         ASM_KEYWORD,
2982   /* RID_TYPEOF */      TYPEOF,
2983   /* RID_ALIGNOF */     ALIGNOF,
2984   /* RID_ATTRIBUTE */   ATTRIBUTE,
2985   /* RID_VA_ARG */      VA_ARG,
2986   /* RID_EXTENSION */   EXTENSION,
2987   /* RID_IMAGPART */    IMAGPART,
2988   /* RID_REALPART */    REALPART,
2989   /* RID_LABEL */       LABEL,
2990   /* RID_PTRBASE */     PTR_BASE,
2991   /* RID_PTREXTENT */   PTR_EXTENT,
2992   /* RID_PTRVALUE */    PTR_VALUE,
2993
2994   /* C++ */
2995   /* RID_BOOL */        0,
2996   /* RID_WCHAR */       0,
2997   /* RID_CLASS */       0,
2998   /* RID_PUBLIC */      0,
2999   /* RID_PRIVATE */     0,
3000   /* RID_PROTECTED */   0,
3001   /* RID_TEMPLATE */    0,
3002   /* RID_NULL */        0,
3003   /* RID_CATCH */       0,
3004   /* RID_DELETE */      0,
3005   /* RID_FALSE */       0,
3006   /* RID_NAMESPACE */   0,
3007   /* RID_NEW */         0,
3008   /* RID_OPERATOR */    0,
3009   /* RID_THIS */        0,
3010   /* RID_THROW */       0,
3011   /* RID_TRUE */        0,
3012   /* RID_TRY */         0,
3013   /* RID_TYPENAME */    0,
3014   /* RID_TYPEID */      0,
3015   /* RID_USING */       0,
3016
3017   /* casts */
3018   /* RID_CONSTCAST */   0,
3019   /* RID_DYNCAST */     0,
3020   /* RID_REINTCAST */   0,
3021   /* RID_STATCAST */    0,
3022
3023   /* alternate spellings */
3024   /* RID_AND */         0,
3025   /* RID_AND_EQ */      0,
3026   /* RID_NOT */         0,
3027   /* RID_NOT_EQ */      0,
3028   /* RID_OR */          0,
3029   /* RID_OR_EQ */       0,
3030   /* RID_XOR */         0,
3031   /* RID_XOR_EQ */      0,
3032   /* RID_BITAND */      0,
3033   /* RID_BITOR */       0,
3034   /* RID_COMPL */       0,
3035
3036   /* Objective C */
3037   /* RID_ID */                  OBJECTNAME,
3038   /* RID_AT_ENCODE */           ENCODE,
3039   /* RID_AT_END */              END,
3040   /* RID_AT_CLASS */            CLASS,
3041   /* RID_AT_ALIAS */            ALIAS,
3042   /* RID_AT_DEFS */             DEFS,
3043   /* RID_AT_PRIVATE */          PRIVATE,
3044   /* RID_AT_PROTECTED */        PROTECTED,
3045   /* RID_AT_PUBLIC */           PUBLIC,
3046   /* RID_AT_PROTOCOL */         PROTOCOL,
3047   /* RID_AT_SELECTOR */         SELECTOR,
3048   /* RID_AT_INTERFACE */        INTERFACE,
3049   /* RID_AT_IMPLEMENTATION */   IMPLEMENTATION
3050 };
3051
3052 static void
3053 init_reswords ()
3054 {
3055   unsigned int i;
3056   tree id;
3057   int mask = ((doing_objc_thang ? 0 : D_OBJC)
3058               | (flag_isoc99 ? 0 : D_C89)
3059               | (flag_traditional ? D_TRAD : 0)
3060               | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0));
3061
3062   /* It is not necessary to register ridpointers as a GC root, because
3063      all the trees it points to are permanently interned in the
3064      get_identifier hash anyway.  */
3065   ridpointers = (tree *) xcalloc ((int) RID_MAX, sizeof (tree));
3066   for (i = 0; i < N_reswords; i++)
3067     {
3068       /* If a keyword is disabled, do not enter it into the table
3069          and so create a canonical spelling that isn't a keyword.  */
3070       if (reswords[i].disable & mask)
3071         continue;
3072
3073       id = get_identifier (reswords[i].word);
3074       C_RID_CODE (id) = reswords[i].rid;
3075       ridpointers [(int) reswords[i].rid] = id;
3076
3077       /* Objective C does tricky things with enabling and disabling
3078          keywords.  So these we must not elide in the test above, but
3079          wait and not mark them reserved now.  */
3080       if (! (reswords[i].disable & D_YES))
3081         C_IS_RESERVED_WORD (id) = 1;
3082     }
3083 }
3084
3085 const char *
3086 init_parse (filename)
3087      const char *filename;
3088 {
3089   add_c_tree_codes ();
3090
3091   /* Make identifier nodes long enough for the language-specific slots.  */
3092   set_identifier_size (sizeof (struct lang_identifier));
3093
3094   init_reswords ();
3095   init_pragma ();
3096
3097   return init_c_lex (filename);
3098 }
3099
3100 void
3101 finish_parse ()
3102 {
3103 #if USE_CPPLIB
3104   cpp_finish (&parse_in, 0 /* no printer */);
3105   errorcount += parse_in.errors;
3106 #else
3107   fclose (finput);
3108 #endif
3109 }
3110
3111 #if USE_CPPLIB
3112 #define NAME(type) cpp_type2name (type)
3113 #else
3114 /* Bleah */
3115 #include "symcat.h"
3116 #define OP(e, s) s,
3117 #define TK(e, s) STRINGX(e),
3118
3119 static const char *type2name[N_TTYPES] = { TTYPE_TABLE };
3120 #define NAME(type) type2name[type]
3121 #endif
3122
3123 static void
3124 yyerror (msgid)
3125      const char *msgid;
3126 {
3127   const char *string = _(msgid);
3128
3129   if (last_token == CPP_EOF)
3130     error ("%s at end of input", string);
3131   else if (last_token == CPP_CHAR || last_token == CPP_WCHAR)
3132     {
3133       unsigned int val = TREE_INT_CST_LOW (yylval.ttype);
3134       const char *ell = (last_token == CPP_CHAR) ? "" : "L";
3135       if (val <= UCHAR_MAX && ISGRAPH (val))
3136         error ("%s before %s'%c'", string, ell, val);
3137       else
3138         error ("%s before %s'\\x%x'", string, ell, val);
3139     }
3140   else if (last_token == CPP_STRING
3141            || last_token == CPP_WSTRING
3142            || last_token == CPP_OSTRING)
3143     error ("%s before string constant", string);
3144   else if (last_token == CPP_NUMBER
3145            || last_token == CPP_INT
3146            || last_token == CPP_FLOAT)
3147     error ("%s before numeric constant", string);
3148   else if (last_token == CPP_NAME)
3149     error ("%s before \"%s\"", string, IDENTIFIER_POINTER (yylval.ttype));
3150   else
3151     error ("%s before '%s' token", string, NAME(last_token));
3152 }
3153
3154 static inline int
3155 _yylex ()
3156 {
3157  retry:
3158   last_token = c_lex (&yylval.ttype);
3159
3160   switch (last_token)
3161     {
3162     case CPP_EQ:                                        return '=';
3163     case CPP_NOT:                                       return '!';
3164     case CPP_GREATER:   yylval.code = GT_EXPR;          return ARITHCOMPARE;
3165     case CPP_LESS:      yylval.code = LT_EXPR;          return ARITHCOMPARE;
3166     case CPP_PLUS:      yylval.code = PLUS_EXPR;        return '+';
3167     case CPP_MINUS:     yylval.code = MINUS_EXPR;       return '-';
3168     case CPP_MULT:      yylval.code = MULT_EXPR;        return '*';
3169     case CPP_DIV:       yylval.code = TRUNC_DIV_EXPR;   return '/';
3170     case CPP_MOD:       yylval.code = TRUNC_MOD_EXPR;   return '%';
3171     case CPP_AND:       yylval.code = BIT_AND_EXPR;     return '&';
3172     case CPP_OR:        yylval.code = BIT_IOR_EXPR;     return '|';
3173     case CPP_XOR:       yylval.code = BIT_XOR_EXPR;     return '^';
3174     case CPP_RSHIFT:    yylval.code = RSHIFT_EXPR;      return RSHIFT;
3175     case CPP_LSHIFT:    yylval.code = LSHIFT_EXPR;      return LSHIFT;
3176
3177     case CPP_COMPL:                                     return '~';
3178     case CPP_AND_AND:                                   return ANDAND;
3179     case CPP_OR_OR:                                     return OROR;
3180     case CPP_QUERY:                                     return '?';
3181     case CPP_COLON:                                     return ':';
3182     case CPP_COMMA:                                     return ',';
3183     case CPP_OPEN_PAREN:                                return '(';
3184     case CPP_CLOSE_PAREN:                               return ')';
3185     case CPP_EQ_EQ:     yylval.code = EQ_EXPR;          return EQCOMPARE;
3186     case CPP_NOT_EQ:    yylval.code = NE_EXPR;          return EQCOMPARE;
3187     case CPP_GREATER_EQ:yylval.code = GE_EXPR;          return ARITHCOMPARE;
3188     case CPP_LESS_EQ:   yylval.code = LE_EXPR;          return ARITHCOMPARE;
3189
3190     case CPP_PLUS_EQ:   yylval.code = PLUS_EXPR;        return ASSIGN;
3191     case CPP_MINUS_EQ:  yylval.code = MINUS_EXPR;       return ASSIGN;
3192     case CPP_MULT_EQ:   yylval.code = MULT_EXPR;        return ASSIGN;
3193     case CPP_DIV_EQ:    yylval.code = TRUNC_DIV_EXPR;   return ASSIGN;
3194     case CPP_MOD_EQ:    yylval.code = TRUNC_MOD_EXPR;   return ASSIGN;
3195     case CPP_AND_EQ:    yylval.code = BIT_AND_EXPR;     return ASSIGN;
3196     case CPP_OR_EQ:     yylval.code = BIT_IOR_EXPR;     return ASSIGN;
3197     case CPP_XOR_EQ:    yylval.code = BIT_XOR_EXPR;     return ASSIGN;
3198     case CPP_RSHIFT_EQ: yylval.code = RSHIFT_EXPR;      return ASSIGN;
3199     case CPP_LSHIFT_EQ: yylval.code = LSHIFT_EXPR;      return ASSIGN;
3200
3201     case CPP_OPEN_SQUARE:                               return '[';
3202     case CPP_CLOSE_SQUARE:                              return ']';
3203     case CPP_OPEN_BRACE:                                return '{';
3204     case CPP_CLOSE_BRACE:                               return '}';
3205     case CPP_SEMICOLON:                                 return ';';
3206     case CPP_ELLIPSIS:                                  return ELLIPSIS;
3207
3208     case CPP_PLUS_PLUS:                                 return PLUSPLUS;
3209     case CPP_MINUS_MINUS:                               return MINUSMINUS;
3210     case CPP_DEREF:                                     return POINTSAT;
3211     case CPP_DOT:                                       return '.';
3212
3213     case CPP_EOF:
3214 #if USE_CPPLIB
3215       cpp_pop_buffer (&parse_in);
3216       if (! CPP_BUFFER (&parse_in))
3217 #endif
3218         return 0;
3219       goto retry;
3220
3221     case CPP_NAME:
3222       if (C_IS_RESERVED_WORD (yylval.ttype))
3223         {
3224           enum rid rid_code = C_RID_CODE (yylval.ttype);
3225           /* Return the canonical spelling for this keyword.  */
3226           yylval.ttype = ridpointers[(int) rid_code];
3227           return rid_to_yy[(int) rid_code];
3228         }
3229
3230       if (IDENTIFIER_POINTER (yylval.ttype)[0] == '@')
3231         {
3232           error ("invalid identifier `%s'", IDENTIFIER_POINTER (yylval.ttype));
3233           return IDENTIFIER;
3234         }
3235
3236       {
3237         tree decl;
3238
3239         decl = lookup_name (yylval.ttype);
3240
3241         if (decl)
3242           {
3243             if (TREE_CODE (decl) == TYPE_DECL)
3244               return TYPENAME;
3245             /* A user-invisible read-only initialized variable
3246                should be replaced by its value.
3247                We handle only strings since that's the only case used in C.  */
3248             else if (TREE_CODE (decl) == VAR_DECL
3249                      && DECL_IGNORED_P (decl)
3250                      && TREE_READONLY (decl)
3251                      && DECL_INITIAL (decl) != 0
3252                      && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST)
3253               {
3254                 tree stringval = DECL_INITIAL (decl);
3255
3256                 /* Copy the string value so that we won't clobber anything
3257                    if we put something in the TREE_CHAIN of this one.  */
3258                 yylval.ttype = build_string (TREE_STRING_LENGTH (stringval),
3259                                              TREE_STRING_POINTER (stringval));
3260                 return STRING;
3261               }
3262           }
3263         else if (doing_objc_thang)
3264           {
3265             tree objc_interface_decl = is_class_name (yylval.ttype);
3266
3267             if (objc_interface_decl)
3268               {
3269                 yylval.ttype = objc_interface_decl;
3270                 return CLASSNAME;
3271               }
3272           }
3273
3274         return IDENTIFIER;
3275       }
3276
3277     case CPP_INT:
3278     case CPP_FLOAT:
3279     case CPP_NUMBER:
3280     case CPP_CHAR:
3281     case CPP_WCHAR:
3282       return CONSTANT;
3283
3284     case CPP_STRING:
3285     case CPP_WSTRING:
3286       return STRING;
3287
3288     case CPP_OSTRING:
3289       return OBJC_STRING;
3290
3291       /* These tokens are C++ specific (and will not be generated
3292          in C mode, but let's be cautious).  */
3293     case CPP_SCOPE:
3294     case CPP_DEREF_STAR:
3295     case CPP_DOT_STAR:
3296     case CPP_MIN_EQ:
3297     case CPP_MAX_EQ:
3298     case CPP_MIN:
3299     case CPP_MAX:
3300       /* These tokens should not survive translation phase 4.  */
3301     case CPP_HASH:
3302     case CPP_PASTE:
3303     case CPP_BACKSLASH:
3304       error ("syntax error before '%s' token", NAME(last_token));
3305       goto retry;
3306
3307     default:
3308       abort ();
3309     }
3310
3311   /* NOTREACHED */
3312 }
3313
3314 static int
3315 yylex()
3316 {
3317   int r;
3318   timevar_push (TV_LEX);
3319   r = _yylex();
3320   timevar_pop (TV_LEX);
3321   return r;
3322 }
3323
3324 /* Sets the value of the 'yydebug' variable to VALUE.
3325    This is a function so we don't have to have YYDEBUG defined
3326    in order to build the compiler.  */
3327
3328 void
3329 set_yydebug (value)
3330      int value;
3331 {
3332 #if YYDEBUG != 0
3333   yydebug = value;
3334 #else
3335   warning ("YYDEBUG not defined.");
3336 #endif
3337 }
3338
3339 /* Function used when yydebug is set, to print a token in more detail.  */
3340
3341 static void
3342 yyprint (file, yychar, yyl)
3343      FILE *file;
3344      int yychar;
3345      YYSTYPE yyl;
3346 {
3347   tree t = yyl.ttype;
3348
3349   fprintf (file, " [%s]", NAME(last_token));
3350
3351   switch (yychar)
3352     {
3353     case IDENTIFIER:
3354     case TYPENAME:
3355     case OBJECTNAME:
3356     case TYPESPEC:
3357     case TYPE_QUAL:
3358     case SCSPEC:
3359       if (IDENTIFIER_POINTER (t))
3360         fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
3361       break;
3362
3363     case CONSTANT:
3364       fprintf (file, " %s", GET_MODE_NAME (TYPE_MODE (TREE_TYPE (t))));
3365       if (TREE_CODE (t) == INTEGER_CST)
3366         fprintf (file,
3367 #if HOST_BITS_PER_WIDE_INT == 64
3368 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
3369                  " 0x%x%016x",
3370 #else
3371 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
3372                  " 0x%lx%016lx",
3373 #else
3374                  " 0x%llx%016llx",
3375 #endif
3376 #endif
3377 #else
3378 #if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
3379                  " 0x%lx%08lx",
3380 #else
3381                  " 0x%x%08x",
3382 #endif
3383 #endif
3384                  TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
3385       break;
3386     }
3387 }
3388 \f
3389 /* This is not the ideal place to put these, but we have to get them out
3390    of c-lex.c because cp/lex.c has its own versions.  */
3391
3392 /* Return something to represent absolute declarators containing a *.
3393    TARGET is the absolute declarator that the * contains.
3394    TYPE_QUALS is a list of modifiers such as const or volatile
3395    to apply to the pointer type, represented as identifiers.
3396
3397    We return an INDIRECT_REF whose "contents" are TARGET
3398    and whose type is the modifier list.  */
3399
3400 tree
3401 make_pointer_declarator (type_quals, target)
3402      tree type_quals, target;
3403 {
3404   return build1 (INDIRECT_REF, type_quals, target);
3405 }