/* A Bison parser, made by GNU Bison 2.3. */ /* Skeleton implementation for Bison's Yacc-like parsers in C Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* As a special exception, you may create a larger work that contains part or all of the Bison parser skeleton and distribute that work under terms of your choice, so long as that work isn't itself a parser generator using the skeleton or a modified version thereof as a parser skeleton. Alternatively, if you modify or redistribute the parser skeleton itself, you may (at your option) remove this special exception, which will cause the skeleton and the resulting Bison output files to be licensed under the GNU General Public License without this special exception. This special exception was added by the Free Software Foundation in version 2.2 of Bison. */ /* C LALR(1) parser skeleton written by Richard Stallman, by simplifying the original so-called "semantic" parser. */ /* All symbols defined below should begin with yy or YY, to avoid infringing on user name space. This should be done even for local variables, as they might otherwise be expanded by user macros. There are some unavoidable exceptions within include files to define necessary library symbols; they are noted "INFRINGES ON USER NAME SPACE" below. */ /* Identify Bison output. */ #define YYBISON 1 /* Bison version. */ #define YYBISON_VERSION "2.3" /* Skeleton name. */ #define YYSKELETON_NAME "yacc.c" /* Pure parsers. */ #define YYPURE 0 /* Using locations. */ #define YYLSP_NEEDED 0 /* Tokens. */ #ifndef YYTOKENTYPE # define YYTOKENTYPE /* Put the tokens into the symbol table, so that GDB and other debuggers know about them. */ enum yytokentype { PROGRAM = 258, ID = 259, VAR = 260, NUM = 261, INTEGER = 262, REAL = 263, FUNCTION = 264, PROCEDURE = 265, PASCALBEGIN = 266, END = 267, ADDOP = 268, ASSIGNOP = 269, IF = 270, THEN = 271, ELSE = 272, WHILE = 273, DO = 274, RELOP = 275, MULOP = 276, NOT = 277, PROG_PARAMETER = 278, IRRELEVANT = 279, UMINUS = 280 }; #endif /* Tokens. */ #define PROGRAM 258 #define ID 259 #define VAR 260 #define NUM 261 #define INTEGER 262 #define REAL 263 #define FUNCTION 264 #define PROCEDURE 265 #define PASCALBEGIN 266 #define END 267 #define ADDOP 268 #define ASSIGNOP 269 #define IF 270 #define THEN 271 #define ELSE 272 #define WHILE 273 #define DO 274 #define RELOP 275 #define MULOP 276 #define NOT 277 #define PROG_PARAMETER 278 #define IRRELEVANT 279 #define UMINUS 280 /* Copy the first part of user declarations. */ #line 2 "comp.y" #include #include #include "debug.h" #include "SyntaxTree.h" #include "SymbolTable.h" #include "Node.h" /* Prototypes */ static void yyerror(const char *); /* Import from comp.l */ extern int yylex(void); /* Lexer function */ extern int lineno; /* Current line number */ extern string lastID; /* The most recently read ID */ extern string lastNUM; /* The most recently read value expression */ /* Other declarations */ SyntaxTree * tree; /* The syntax tree */ SymbolTable * symtab; /* The symbol table */ string mainScopeName; /* The name of the main scope */ #ifdef DEBUG int msglevel = 90; /* higher = more debugging messages */ #else int msglevel = 0; /* don't bother sensitive souls */ #endif /* Enabling traces. */ #ifndef YYDEBUG # define YYDEBUG 1 #endif /* Enabling verbose error messages. */ #ifdef YYERROR_VERBOSE # undef YYERROR_VERBOSE # define YYERROR_VERBOSE 1 #else # define YYERROR_VERBOSE 0 #endif /* Enabling the token table. */ #ifndef YYTOKEN_TABLE # define YYTOKEN_TABLE 0 #endif #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED typedef union YYSTYPE #line 48 "comp.y" { Node *node; } /* Line 193 of yacc.c. */ #line 185 "gen/y.tab.c" YYSTYPE; # define yystype YYSTYPE /* obsolescent; will be withdrawn */ # define YYSTYPE_IS_DECLARED 1 # define YYSTYPE_IS_TRIVIAL 1 #endif /* Copy the second part of user declarations. */ /* Line 216 of yacc.c. */ #line 198 "gen/y.tab.c" #ifdef short # undef short #endif #ifdef YYTYPE_UINT8 typedef YYTYPE_UINT8 yytype_uint8; #else typedef unsigned char yytype_uint8; #endif #ifdef YYTYPE_INT8 typedef YYTYPE_INT8 yytype_int8; #elif (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) typedef signed char yytype_int8; #else typedef short int yytype_int8; #endif #ifdef YYTYPE_UINT16 typedef YYTYPE_UINT16 yytype_uint16; #else typedef unsigned short int yytype_uint16; #endif #ifdef YYTYPE_INT16 typedef YYTYPE_INT16 yytype_int16; #else typedef short int yytype_int16; #endif #ifndef YYSIZE_T # ifdef __SIZE_TYPE__ # define YYSIZE_T __SIZE_TYPE__ # elif defined size_t # define YYSIZE_T size_t # elif ! defined YYSIZE_T && (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) # include /* INFRINGES ON USER NAME SPACE */ # define YYSIZE_T size_t # else # define YYSIZE_T unsigned int # endif #endif #define YYSIZE_MAXIMUM ((YYSIZE_T) -1) #ifndef YY_ # if defined YYENABLE_NLS && YYENABLE_NLS # if ENABLE_NLS # include /* INFRINGES ON USER NAME SPACE */ # define YY_(msgid) dgettext ("bison-runtime", msgid) # endif # endif # ifndef YY_ # define YY_(msgid) msgid # endif #endif /* Suppress unused-variable warnings by "using" E. */ #if ! defined lint || defined __GNUC__ # define YYUSE(e) ((void) (e)) #else # define YYUSE(e) /* empty */ #endif /* Identity function, used to suppress warnings about constant conditions. */ #ifndef lint # define YYID(n) (n) #else #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) static int YYID (int i) #else static int YYID (i) int i; #endif { return i; } #endif #if ! defined yyoverflow || YYERROR_VERBOSE /* The parser invokes alloca or malloc; define the necessary symbols. */ # ifdef YYSTACK_USE_ALLOCA # if YYSTACK_USE_ALLOCA # ifdef __GNUC__ # define YYSTACK_ALLOC __builtin_alloca # elif defined __BUILTIN_VA_ARG_INCR # include /* INFRINGES ON USER NAME SPACE */ # elif defined _AIX # define YYSTACK_ALLOC __alloca # elif defined _MSC_VER # include /* INFRINGES ON USER NAME SPACE */ # define alloca _alloca # else # define YYSTACK_ALLOC alloca # if ! defined _ALLOCA_H && ! defined _STDLIB_H && (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) # include /* INFRINGES ON USER NAME SPACE */ # ifndef _STDLIB_H # define _STDLIB_H 1 # endif # endif # endif # endif # endif # ifdef YYSTACK_ALLOC /* Pacify GCC's `empty if-body' warning. */ # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0)) # ifndef YYSTACK_ALLOC_MAXIMUM /* The OS might guarantee only one guard page at the bottom of the stack, and a page size can be as small as 4096 bytes. So we cannot safely invoke alloca (N) if N exceeds 4096. Use a slightly smaller number to allow for a few compiler-allocated temporary stack slots. */ # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */ # endif # else # define YYSTACK_ALLOC YYMALLOC # define YYSTACK_FREE YYFREE # ifndef YYSTACK_ALLOC_MAXIMUM # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM # endif # if (defined __cplusplus && ! defined _STDLIB_H \ && ! ((defined YYMALLOC || defined malloc) \ && (defined YYFREE || defined free))) # include /* INFRINGES ON USER NAME SPACE */ # ifndef _STDLIB_H # define _STDLIB_H 1 # endif # endif # ifndef YYMALLOC # define YYMALLOC malloc # if ! defined malloc && ! defined _STDLIB_H && (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */ # endif # endif # ifndef YYFREE # define YYFREE free # if ! defined free && ! defined _STDLIB_H && (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) void free (void *); /* INFRINGES ON USER NAME SPACE */ # endif # endif # endif #endif /* ! defined yyoverflow || YYERROR_VERBOSE */ #if (! defined yyoverflow \ && (! defined __cplusplus \ || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))) /* A type that is properly aligned for any stack member. */ union yyalloc { yytype_int16 yyss; YYSTYPE yyvs; }; /* The size of the maximum gap between one aligned stack and the next. */ # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1) /* The size of an array large to enough to hold all stacks, each with N elements. */ # define YYSTACK_BYTES(N) \ ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \ + YYSTACK_GAP_MAXIMUM) /* Copy COUNT objects from FROM to TO. The source and destination do not overlap. */ # ifndef YYCOPY # if defined __GNUC__ && 1 < __GNUC__ # define YYCOPY(To, From, Count) \ __builtin_memcpy (To, From, (Count) * sizeof (*(From))) # else # define YYCOPY(To, From, Count) \ do \ { \ YYSIZE_T yyi; \ for (yyi = 0; yyi < (Count); yyi++) \ (To)[yyi] = (From)[yyi]; \ } \ while (YYID (0)) # endif # endif /* Relocate STACK from its old location to the new one. The local variables YYSIZE and YYSTACKSIZE give the old and new number of elements in the stack, and YYPTR gives the new location of the stack. Advance YYPTR to a properly aligned location for the next stack. */ # define YYSTACK_RELOCATE(Stack) \ do \ { \ YYSIZE_T yynewbytes; \ YYCOPY (&yyptr->Stack, Stack, yysize); \ Stack = &yyptr->Stack; \ yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \ yyptr += yynewbytes / sizeof (*yyptr); \ } \ while (YYID (0)) #endif /* YYFINAL -- State number of the termination state. */ #define YYFINAL 4 /* YYLAST -- Last index in YYTABLE. */ #define YYLAST 104 /* YYNTOKENS -- Number of terminals. */ #define YYNTOKENS 34 /* YYNNTS -- Number of nonterminals. */ #define YYNNTS 28 /* YYNRULES -- Number of rules. */ #define YYNRULES 55 /* YYNRULES -- Number of states. */ #define YYNSTATES 110 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ #define YYUNDEFTOK 2 #define YYMAXUTOK 280 #define YYTRANSLATE(YYX) \ ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */ static const yytype_uint8 yytranslate[] = { 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 30, 31, 2, 32, 28, 33, 27, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 29, 26, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 }; #if YYDEBUG /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in YYRHS. */ static const yytype_uint8 yyprhs[] = { 0, 0, 3, 4, 13, 17, 20, 26, 27, 29, 31, 33, 37, 38, 42, 49, 54, 58, 59, 63, 65, 68, 72, 74, 75, 77, 81, 85, 87, 89, 95, 100, 103, 104, 106, 108, 113, 115, 119, 123, 127, 129, 131, 134, 137, 141, 145, 149, 151, 155, 157, 162, 164, 168, 171, 173 }; /* YYRHS -- A `-1'-separated list of the rules' RHS. */ static const yytype_int8 yyrhs[] = { 35, 0, -1, -1, 3, 4, 36, 26, 38, 41, 47, 27, -1, 28, 4, 37, -1, 29, 39, -1, 38, 5, 4, 37, 26, -1, -1, 40, -1, 7, -1, 8, -1, 41, 42, 26, -1, -1, 43, 38, 47, -1, 9, 4, 44, 29, 40, 26, -1, 10, 4, 44, 26, -1, 30, 45, 31, -1, -1, 46, 26, 45, -1, 46, -1, 4, 37, -1, 11, 48, 12, -1, 49, -1, -1, 50, -1, 49, 26, 50, -1, 52, 14, 56, -1, 53, -1, 47, -1, 15, 55, 16, 50, 51, -1, 18, 55, 19, 50, -1, 17, 50, -1, -1, 4, -1, 4, -1, 4, 30, 54, 31, -1, 56, -1, 56, 28, 54, -1, 56, 20, 56, -1, 30, 55, 31, -1, 57, -1, 58, -1, 60, 58, -1, 61, 58, -1, 57, 32, 58, -1, 57, 33, 58, -1, 57, 13, 58, -1, 59, -1, 58, 21, 59, -1, 4, -1, 4, 30, 54, 31, -1, 6, -1, 30, 56, 31, -1, 22, 59, -1, 32, -1, 33, -1 }; /* YYRLINE[YYN] -- source line where rule number YYN was defined. */ static const yytype_uint16 yyrline[] = { 0, 57, 57, 57, 73, 75, 82, 86, 90, 95, 97, 102, 104, 109, 114, 116, 120, 122, 126, 128, 132, 137, 142, 144, 148, 150, 154, 156, 158, 160, 162, 167, 169, 174, 180, 182, 188, 190, 193, 195, 199, 204, 206, 208, 210, 228, 230, 234, 236, 240, 242, 244, 246, 248, 253, 256 }; #endif #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. First, the terminals, then, starting at YYNTOKENS, nonterminals. */ static const char *const yytname[] = { "$end", "error", "$undefined", "PROGRAM", "ID", "VAR", "NUM", "INTEGER", "REAL", "FUNCTION", "PROCEDURE", "PASCALBEGIN", "END", "ADDOP", "ASSIGNOP", "IF", "THEN", "ELSE", "WHILE", "DO", "RELOP", "MULOP", "NOT", "PROG_PARAMETER", "IRRELEVANT", "UMINUS", "';'", "'.'", "','", "':'", "'('", "')'", "'+'", "'-'", "$accept", "program", "@1", "type_identifier_list", "declarations", "type", "standard_type", "subprogram_declarations", "subprogram_declaration", "subprogram_head", "arguments", "parameter_lists", "parameter_list", "compound_statement", "optional_statements", "statement_list", "statement", "optional_else_statement", "variable", "procedure_statement", "expression_list", "boollikeexp", "expression", "simple_expression", "term", "factor", "signplus", "signminus", 0 }; #endif # ifdef YYPRINT /* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to token YYLEX-NUM. */ static const yytype_uint16 yytoknum[] = { 0, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 59, 46, 44, 58, 40, 41, 43, 45 }; # endif /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ static const yytype_uint8 yyr1[] = { 0, 34, 36, 35, 37, 37, 38, 38, 39, 40, 40, 41, 41, 42, 43, 43, 44, 44, 45, 45, 46, 47, 48, 48, 49, 49, 50, 50, 50, 50, 50, 51, 51, 52, 53, 53, 54, 54, 55, 55, 56, 57, 57, 57, 57, 57, 57, 58, 58, 59, 59, 59, 59, 59, 60, 61 }; /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ static const yytype_uint8 yyr2[] = { 0, 2, 0, 8, 3, 2, 5, 0, 1, 1, 1, 3, 0, 3, 6, 4, 3, 0, 3, 1, 2, 3, 1, 0, 1, 3, 3, 1, 1, 5, 4, 2, 0, 1, 1, 4, 1, 3, 3, 3, 1, 1, 2, 2, 3, 3, 3, 1, 3, 1, 4, 1, 3, 2, 1, 1 }; /* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state STATE-NUM when YYTABLE doesn't specify something else to do. Zero means the default is an error. */ static const yytype_uint8 yydefact[] = { 0, 0, 0, 2, 1, 0, 7, 12, 0, 0, 0, 0, 0, 23, 0, 7, 0, 0, 0, 0, 17, 17, 34, 0, 0, 28, 0, 22, 24, 0, 27, 11, 0, 3, 0, 9, 10, 5, 8, 6, 0, 0, 0, 0, 49, 51, 0, 0, 54, 55, 0, 0, 40, 41, 47, 0, 0, 0, 21, 0, 0, 13, 4, 0, 0, 19, 0, 15, 0, 0, 36, 0, 53, 0, 0, 0, 0, 0, 0, 0, 0, 42, 43, 0, 25, 26, 20, 16, 0, 0, 0, 35, 0, 0, 39, 52, 32, 38, 46, 44, 45, 48, 30, 18, 14, 37, 50, 0, 29, 31 }; /* YYDEFGOTO[NTERM-NUM]. */ static const yytype_int8 yydefgoto[] = { -1, 2, 5, 19, 7, 37, 38, 9, 14, 15, 41, 64, 65, 25, 26, 27, 28, 108, 29, 30, 69, 50, 70, 52, 53, 54, 55, 56 }; /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing STATE-NUM. */ #define YYPACT_NINF -66 static const yytype_int8 yypact[] = { 5, 43, 58, -66, -66, 34, -66, 56, 62, 4, 23, 63, 64, 44, 45, -66, 42, 66, 49, 46, 47, 47, 35, -1, -1, -66, 61, 48, -66, 65, -66, -66, 11, -66, 23, -66, -66, -66, -66, -66, 71, 51, 50, 3, 52, -66, 24, -1, -66, -66, 67, 68, 31, 57, -66, 24, 24, 70, -66, 44, 3, -66, -66, 23, 53, 55, 49, -66, 3, 54, 59, 3, -66, 60, -8, 44, 3, 24, 24, 24, 24, 57, 57, 44, -66, -66, -66, -66, 71, 69, 72, -66, 3, 73, -66, -66, 75, -66, 57, 57, 57, -66, -66, -66, -66, -66, -66, 44, -66, -66 }; /* YYPGOTO[NTERM-NUM]. */ static const yytype_int8 yypgoto[] = { -66, -66, -66, -24, 78, -66, 20, -66, -66, -66, 76, 6, -66, 2, -66, -66, -57, -66, -66, -66, -65, -7, -23, -66, -36, -42, -66, -66 }; /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If positive, shift that token. If negative, reduce the rule which number is the opposite. If zero, do what YYDEFACT says. If YYTABLE_NINF, syntax error. */ #define YYTABLE_NINF -34 static const yytype_int8 yytable[] = { 51, 51, 84, 44, 72, 45, 93, 44, 1, 45, 62, 16, 76, 11, 12, 13, 8, 57, 96, 81, 82, 46, 13, 95, 74, 46, 102, 105, 44, 47, 45, 48, 49, 68, 61, 48, 49, 85, 101, 86, 73, 98, 99, 100, 77, 90, 46, 3, 22, -33, 109, 17, 18, 97, 68, 13, 35, 36, 4, 23, 6, 8, 24, 78, 79, 43, 10, 20, 21, 33, 34, 31, 39, 58, 59, 63, 67, 40, 80, 60, 66, 88, 71, 75, 87, 91, 89, 92, 76, 83, 0, 94, 107, 32, 103, 104, 0, 42, 0, 0, 0, 0, 0, 95, 106 }; static const yytype_int8 yycheck[] = { 23, 24, 59, 4, 46, 6, 71, 4, 3, 6, 34, 9, 20, 9, 10, 11, 5, 24, 75, 55, 56, 22, 11, 31, 47, 22, 83, 92, 4, 30, 6, 32, 33, 30, 32, 32, 33, 60, 80, 63, 47, 77, 78, 79, 13, 68, 22, 4, 4, 14, 107, 28, 29, 76, 30, 11, 7, 8, 0, 15, 26, 5, 18, 32, 33, 30, 4, 4, 4, 27, 4, 26, 26, 12, 26, 4, 26, 30, 21, 14, 29, 26, 30, 16, 31, 31, 66, 28, 20, 19, -1, 31, 17, 15, 88, 26, -1, 21, -1, -1, -1, -1, -1, 31, 31 }; /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing symbol of state STATE-NUM. */ static const yytype_uint8 yystos[] = { 0, 3, 35, 4, 0, 36, 26, 38, 5, 41, 4, 9, 10, 11, 42, 43, 47, 28, 29, 37, 4, 4, 4, 15, 18, 47, 48, 49, 50, 52, 53, 26, 38, 27, 4, 7, 8, 39, 40, 26, 30, 44, 44, 30, 4, 6, 22, 30, 32, 33, 55, 56, 57, 58, 59, 60, 61, 55, 12, 26, 14, 47, 37, 4, 45, 46, 29, 26, 30, 54, 56, 30, 59, 55, 56, 16, 20, 13, 32, 33, 21, 58, 58, 19, 50, 56, 37, 31, 26, 40, 56, 31, 28, 54, 31, 31, 50, 56, 58, 58, 58, 59, 50, 45, 26, 54, 31, 17, 51, 50 }; #define yyerrok (yyerrstatus = 0) #define yyclearin (yychar = YYEMPTY) #define YYEMPTY (-2) #define YYEOF 0 #define YYACCEPT goto yyacceptlab #define YYABORT goto yyabortlab #define YYERROR goto yyerrorlab /* Like YYERROR except do call yyerror. This remains here temporarily to ease the transition to the new meaning of YYERROR, for GCC. Once GCC version 2 has supplanted version 1, this can go. */ #define YYFAIL goto yyerrlab #define YYRECOVERING() (!!yyerrstatus) #define YYBACKUP(Token, Value) \ do \ if (yychar == YYEMPTY && yylen == 1) \ { \ yychar = (Token); \ yylval = (Value); \ yytoken = YYTRANSLATE (yychar); \ YYPOPSTACK (1); \ goto yybackup; \ } \ else \ { \ yyerror (YY_("syntax error: cannot back up")); \ YYERROR; \ } \ while (YYID (0)) #define YYTERROR 1 #define YYERRCODE 256 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N]. If N is 0, then set CURRENT to the empty location which ends the previous symbol: RHS[0] (always defined). */ #define YYRHSLOC(Rhs, K) ((Rhs)[K]) #ifndef YYLLOC_DEFAULT # define YYLLOC_DEFAULT(Current, Rhs, N) \ do \ if (YYID (N)) \ { \ (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \ (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \ (Current).last_line = YYRHSLOC (Rhs, N).last_line; \ (Current).last_column = YYRHSLOC (Rhs, N).last_column; \ } \ else \ { \ (Current).first_line = (Current).last_line = \ YYRHSLOC (Rhs, 0).last_line; \ (Current).first_column = (Current).last_column = \ YYRHSLOC (Rhs, 0).last_column; \ } \ while (YYID (0)) #endif /* YY_LOCATION_PRINT -- Print the location on the stream. This macro was not mandated originally: define only if we know we won't break user code: when these are the locations we know. */ #ifndef YY_LOCATION_PRINT # if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL # define YY_LOCATION_PRINT(File, Loc) \ fprintf (File, "%d.%d-%d.%d", \ (Loc).first_line, (Loc).first_column, \ (Loc).last_line, (Loc).last_column) # else # define YY_LOCATION_PRINT(File, Loc) ((void) 0) # endif #endif /* YYLEX -- calling `yylex' with the right arguments. */ #ifdef YYLEX_PARAM # define YYLEX yylex (YYLEX_PARAM) #else # define YYLEX yylex () #endif /* Enable debugging if requested. */ #if YYDEBUG # ifndef YYFPRINTF # include /* INFRINGES ON USER NAME SPACE */ # define YYFPRINTF fprintf # endif # define YYDPRINTF(Args) \ do { \ if (yydebug) \ YYFPRINTF Args; \ } while (YYID (0)) # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ do { \ if (yydebug) \ { \ YYFPRINTF (stderr, "%s ", Title); \ yy_symbol_print (stderr, \ Type, Value); \ YYFPRINTF (stderr, "\n"); \ } \ } while (YYID (0)) /*--------------------------------. | Print this symbol on YYOUTPUT. | `--------------------------------*/ /*ARGSUSED*/ #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) static void yy_symbol_value_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep) #else static void yy_symbol_value_print (yyoutput, yytype, yyvaluep) FILE *yyoutput; int yytype; YYSTYPE const * const yyvaluep; #endif { if (!yyvaluep) return; # ifdef YYPRINT if (yytype < YYNTOKENS) YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep); # else YYUSE (yyoutput); # endif switch (yytype) { default: break; } } /*--------------------------------. | Print this symbol on YYOUTPUT. | `--------------------------------*/ #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) static void yy_symbol_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep) #else static void yy_symbol_print (yyoutput, yytype, yyvaluep) FILE *yyoutput; int yytype; YYSTYPE const * const yyvaluep; #endif { if (yytype < YYNTOKENS) YYFPRINTF (yyoutput, "token %s (", yytname[yytype]); else YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]); yy_symbol_value_print (yyoutput, yytype, yyvaluep); YYFPRINTF (yyoutput, ")"); } /*------------------------------------------------------------------. | yy_stack_print -- Print the state stack from its BOTTOM up to its | | TOP (included). | `------------------------------------------------------------------*/ #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) static void yy_stack_print (yytype_int16 *bottom, yytype_int16 *top) #else static void yy_stack_print (bottom, top) yytype_int16 *bottom; yytype_int16 *top; #endif { YYFPRINTF (stderr, "Stack now"); for (; bottom <= top; ++bottom) YYFPRINTF (stderr, " %d", *bottom); YYFPRINTF (stderr, "\n"); } # define YY_STACK_PRINT(Bottom, Top) \ do { \ if (yydebug) \ yy_stack_print ((Bottom), (Top)); \ } while (YYID (0)) /*------------------------------------------------. | Report that the YYRULE is going to be reduced. | `------------------------------------------------*/ #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) static void yy_reduce_print (YYSTYPE *yyvsp, int yyrule) #else static void yy_reduce_print (yyvsp, yyrule) YYSTYPE *yyvsp; int yyrule; #endif { int yynrhs = yyr2[yyrule]; int yyi; unsigned long int yylno = yyrline[yyrule]; YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n", yyrule - 1, yylno); /* The symbols being reduced. */ for (yyi = 0; yyi < yynrhs; yyi++) { fprintf (stderr, " $%d = ", yyi + 1); yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi], &(yyvsp[(yyi + 1) - (yynrhs)]) ); fprintf (stderr, "\n"); } } # define YY_REDUCE_PRINT(Rule) \ do { \ if (yydebug) \ yy_reduce_print (yyvsp, Rule); \ } while (YYID (0)) /* Nonzero means print parse trace. It is left uninitialized so that multiple parsers can coexist. */ int yydebug; #else /* !YYDEBUG */ # define YYDPRINTF(Args) # define YY_SYMBOL_PRINT(Title, Type, Value, Location) # define YY_STACK_PRINT(Bottom, Top) # define YY_REDUCE_PRINT(Rule) #endif /* !YYDEBUG */ /* YYINITDEPTH -- initial size of the parser's stacks. */ #ifndef YYINITDEPTH # define YYINITDEPTH 200 #endif /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only if the built-in stack extension method is used). Do not make this value too large; the results are undefined if YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH) evaluated with infinite-precision integer arithmetic. */ #ifndef YYMAXDEPTH # define YYMAXDEPTH 10000 #endif #if YYERROR_VERBOSE # ifndef yystrlen # if defined __GLIBC__ && defined _STRING_H # define yystrlen strlen # else /* Return the length of YYSTR. */ #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) static YYSIZE_T yystrlen (const char *yystr) #else static YYSIZE_T yystrlen (yystr) const char *yystr; #endif { YYSIZE_T yylen; for (yylen = 0; yystr[yylen]; yylen++) continue; return yylen; } # endif # endif # ifndef yystpcpy # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE # define yystpcpy stpcpy # else /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in YYDEST. */ #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) static char * yystpcpy (char *yydest, const char *yysrc) #else static char * yystpcpy (yydest, yysrc) char *yydest; const char *yysrc; #endif { char *yyd = yydest; const char *yys = yysrc; while ((*yyd++ = *yys++) != '\0') continue; return yyd - 1; } # endif # endif # ifndef yytnamerr /* Copy to YYRES the contents of YYSTR after stripping away unnecessary quotes and backslashes, so that it's suitable for yyerror. The heuristic is that double-quoting is unnecessary unless the string contains an apostrophe, a comma, or backslash (other than backslash-backslash). YYSTR is taken from yytname. If YYRES is null, do not copy; instead, return the length of what the result would have been. */ static YYSIZE_T yytnamerr (char *yyres, const char *yystr) { if (*yystr == '"') { YYSIZE_T yyn = 0; char const *yyp = yystr; for (;;) switch (*++yyp) { case '\'': case ',': goto do_not_strip_quotes; case '\\': if (*++yyp != '\\') goto do_not_strip_quotes; /* Fall through. */ default: if (yyres) yyres[yyn] = *yyp; yyn++; break; case '"': if (yyres) yyres[yyn] = '\0'; return yyn; } do_not_strip_quotes: ; } if (! yyres) return yystrlen (yystr); return yystpcpy (yyres, yystr) - yyres; } # endif /* Copy into YYRESULT an error message about the unexpected token YYCHAR while in state YYSTATE. Return the number of bytes copied, including the terminating null byte. If YYRESULT is null, do not copy anything; just return the number of bytes that would be copied. As a special case, return 0 if an ordinary "syntax error" message will do. Return YYSIZE_MAXIMUM if overflow occurs during size calculation. */ static YYSIZE_T yysyntax_error (char *yyresult, int yystate, int yychar) { int yyn = yypact[yystate]; if (! (YYPACT_NINF < yyn && yyn <= YYLAST)) return 0; else { int yytype = YYTRANSLATE (yychar); YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]); YYSIZE_T yysize = yysize0; YYSIZE_T yysize1; int yysize_overflow = 0; enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM]; int yyx; # if 0 /* This is so xgettext sees the translatable formats that are constructed on the fly. */ YY_("syntax error, unexpected %s"); YY_("syntax error, unexpected %s, expecting %s"); YY_("syntax error, unexpected %s, expecting %s or %s"); YY_("syntax error, unexpected %s, expecting %s or %s or %s"); YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"); # endif char *yyfmt; char const *yyf; static char const yyunexpected[] = "syntax error, unexpected %s"; static char const yyexpecting[] = ", expecting %s"; static char const yyor[] = " or %s"; char yyformat[sizeof yyunexpected + sizeof yyexpecting - 1 + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2) * (sizeof yyor - 1))]; char const *yyprefix = yyexpecting; /* Start YYX at -YYN if negative to avoid negative indexes in YYCHECK. */ int yyxbegin = yyn < 0 ? -yyn : 0; /* Stay within bounds of both yycheck and yytname. */ int yychecklim = YYLAST - yyn + 1; int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; int yycount = 1; yyarg[0] = yytname[yytype]; yyfmt = yystpcpy (yyformat, yyunexpected); for (yyx = yyxbegin; yyx < yyxend; ++yyx) if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR) { if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) { yycount = 1; yysize = yysize0; yyformat[sizeof yyunexpected - 1] = '\0'; break; } yyarg[yycount++] = yytname[yyx]; yysize1 = yysize + yytnamerr (0, yytname[yyx]); yysize_overflow |= (yysize1 < yysize); yysize = yysize1; yyfmt = yystpcpy (yyfmt, yyprefix); yyprefix = yyor; } yyf = YY_(yyformat); yysize1 = yysize + yystrlen (yyf); yysize_overflow |= (yysize1 < yysize); yysize = yysize1; if (yysize_overflow) return YYSIZE_MAXIMUM; if (yyresult) { /* Avoid sprintf, as that infringes on the user's name space. Don't have undefined behavior even if the translation produced a string with the wrong number of "%s"s. */ char *yyp = yyresult; int yyi = 0; while ((*yyp = *yyf) != '\0') { if (*yyp == '%' && yyf[1] == 's' && yyi < yycount) { yyp += yytnamerr (yyp, yyarg[yyi++]); yyf += 2; } else { yyp++; yyf++; } } } return yysize; } } #endif /* YYERROR_VERBOSE */ /*-----------------------------------------------. | Release the memory associated to this symbol. | `-----------------------------------------------*/ /*ARGSUSED*/ #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) static void yydestruct (const char *yymsg, int yytype, YYSTYPE *yyvaluep) #else static void yydestruct (yymsg, yytype, yyvaluep) const char *yymsg; int yytype; YYSTYPE *yyvaluep; #endif { YYUSE (yyvaluep); if (!yymsg) yymsg = "Deleting"; YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); switch (yytype) { default: break; } } /* Prevent warnings from -Wmissing-prototypes. */ #ifdef YYPARSE_PARAM #if defined __STDC__ || defined __cplusplus int yyparse (void *YYPARSE_PARAM); #else int yyparse (); #endif #else /* ! YYPARSE_PARAM */ #if defined __STDC__ || defined __cplusplus int yyparse (void); #else int yyparse (); #endif #endif /* ! YYPARSE_PARAM */ /* The look-ahead symbol. */ int yychar; /* The semantic value of the look-ahead symbol. */ YYSTYPE yylval; /* Number of syntax errors so far. */ int yynerrs; /*----------. | yyparse. | `----------*/ #ifdef YYPARSE_PARAM #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) int yyparse (void *YYPARSE_PARAM) #else int yyparse (YYPARSE_PARAM) void *YYPARSE_PARAM; #endif #else /* ! YYPARSE_PARAM */ #if (defined __STDC__ || defined __C99__FUNC__ \ || defined __cplusplus || defined _MSC_VER) int yyparse (void) #else int yyparse () #endif #endif { int yystate; int yyn; int yyresult; /* Number of tokens to shift before error messages enabled. */ int yyerrstatus; /* Look-ahead token as an internal (translated) token number. */ int yytoken = 0; #if YYERROR_VERBOSE /* Buffer for error messages, and its allocated size. */ char yymsgbuf[128]; char *yymsg = yymsgbuf; YYSIZE_T yymsg_alloc = sizeof yymsgbuf; #endif /* Three stacks and their tools: `yyss': related to states, `yyvs': related to semantic values, `yyls': related to locations. Refer to the stacks thru separate pointers, to allow yyoverflow to reallocate them elsewhere. */ /* The state stack. */ yytype_int16 yyssa[YYINITDEPTH]; yytype_int16 *yyss = yyssa; yytype_int16 *yyssp; /* The semantic value stack. */ YYSTYPE yyvsa[YYINITDEPTH]; YYSTYPE *yyvs = yyvsa; YYSTYPE *yyvsp; #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)) YYSIZE_T yystacksize = YYINITDEPTH; /* The variables used to return semantic value and location from the action routines. */ YYSTYPE yyval; /* The number of symbols on the RHS of the reduced rule. Keep to zero when no symbol should be popped. */ int yylen = 0; YYDPRINTF ((stderr, "Starting parse\n")); yystate = 0; yyerrstatus = 0; yynerrs = 0; yychar = YYEMPTY; /* Cause a token to be read. */ /* Initialize stack pointers. Waste one element of value and location stack so that they stay on the same level as the state stack. The wasted elements are never initialized. */ yyssp = yyss; yyvsp = yyvs; goto yysetstate; /*------------------------------------------------------------. | yynewstate -- Push a new state, which is found in yystate. | `------------------------------------------------------------*/ yynewstate: /* In all cases, when you get here, the value and location stacks have just been pushed. So pushing a state here evens the stacks. */ yyssp++; yysetstate: *yyssp = yystate; if (yyss + yystacksize - 1 <= yyssp) { /* Get the current used size of the three stacks, in elements. */ YYSIZE_T yysize = yyssp - yyss + 1; #ifdef yyoverflow { /* Give user a chance to reallocate the stack. Use copies of these so that the &'s don't force the real ones into memory. */ YYSTYPE *yyvs1 = yyvs; yytype_int16 *yyss1 = yyss; /* Each stack pointer address is followed by the size of the data in use in that stack, in bytes. This used to be a conditional around just the two extra args, but that might be undefined if yyoverflow is a macro. */ yyoverflow (YY_("memory exhausted"), &yyss1, yysize * sizeof (*yyssp), &yyvs1, yysize * sizeof (*yyvsp), &yystacksize); yyss = yyss1; yyvs = yyvs1; } #else /* no yyoverflow */ # ifndef YYSTACK_RELOCATE goto yyexhaustedlab; # else /* Extend the stack our own way. */ if (YYMAXDEPTH <= yystacksize) goto yyexhaustedlab; yystacksize *= 2; if (YYMAXDEPTH < yystacksize) yystacksize = YYMAXDEPTH; { yytype_int16 *yyss1 = yyss; union yyalloc *yyptr = (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize)); if (! yyptr) goto yyexhaustedlab; YYSTACK_RELOCATE (yyss); YYSTACK_RELOCATE (yyvs); # undef YYSTACK_RELOCATE if (yyss1 != yyssa) YYSTACK_FREE (yyss1); } # endif #endif /* no yyoverflow */ yyssp = yyss + yysize - 1; yyvsp = yyvs + yysize - 1; YYDPRINTF ((stderr, "Stack size increased to %lu\n", (unsigned long int) yystacksize)); if (yyss + yystacksize - 1 <= yyssp) YYABORT; } YYDPRINTF ((stderr, "Entering state %d\n", yystate)); goto yybackup; /*-----------. | yybackup. | `-----------*/ yybackup: /* Do appropriate processing given the current state. Read a look-ahead token if we need one and don't already have one. */ /* First try to decide what to do without reference to look-ahead token. */ yyn = yypact[yystate]; if (yyn == YYPACT_NINF) goto yydefault; /* Not known => get a look-ahead token if don't already have one. */ /* YYCHAR is either YYEMPTY or YYEOF or a valid look-ahead symbol. */ if (yychar == YYEMPTY) { YYDPRINTF ((stderr, "Reading a token: ")); yychar = YYLEX; } if (yychar <= YYEOF) { yychar = yytoken = YYEOF; YYDPRINTF ((stderr, "Now at end of input.\n")); } else { yytoken = YYTRANSLATE (yychar); YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); } /* If the proper action on seeing token YYTOKEN is to reduce or to detect an error, take that action. */ yyn += yytoken; if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken) goto yydefault; yyn = yytable[yyn]; if (yyn <= 0) { if (yyn == 0 || yyn == YYTABLE_NINF) goto yyerrlab; yyn = -yyn; goto yyreduce; } if (yyn == YYFINAL) YYACCEPT; /* Count tokens shifted since error; after three, turn off error status. */ if (yyerrstatus) yyerrstatus--; /* Shift the look-ahead token. */ YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); /* Discard the shifted token unless it is eof. */ if (yychar != YYEOF) yychar = YYEMPTY; yystate = yyn; *++yyvsp = yylval; goto yynewstate; /*-----------------------------------------------------------. | yydefault -- do the default action for the current state. | `-----------------------------------------------------------*/ yydefault: yyn = yydefact[yystate]; if (yyn == 0) goto yyerrlab; goto yyreduce; /*-----------------------------. | yyreduce -- Do a reduction. | `-----------------------------*/ yyreduce: /* yyn is the number of a rule to reduce with. */ yylen = yyr2[yyn]; /* If YYLEN is nonzero, implement the default value of the action: `$$ = $1'. Otherwise, the following line sets YYVAL to garbage. This behavior is undocumented and Bison users should not rely upon it. Assigning to YYVAL unconditionally makes the parser a bit smaller, and it avoids a GCC warning that YYVAL may be used uninitialized. */ yyval = yyvsp[1-yylen]; YY_REDUCE_PRINT (yyn); switch (yyn) { case 2: #line 57 "comp.y" { /* The program name has just been read; save it */ mainScopeName = lastID; /* Put the program name into the syntax tree */ tree->SetProgramName (mainScopeName); /* Create a new scope in the symbol table */ symtab->AddScope (mainScopeName); } break; case 44: #line 210 "comp.y" { /* This is an example on how to work with the syntax tree construction routines: ReturnType returnType = ... $$ = tree->CreateParentNode(NODE_ADD, returnType, $1, $3); Using this invocation, we construct a parent node of type NODE_ADD, with child nodes $1 and $3 (these refer to 'simple_expression' resp. 'term'). The return type of this node should be based on that of its child nodes. Using the assignment to $$, the newly created node is passed to a grammar rule at a higher level, where the subtree should be inserted into a larger tree using a similar approach. */ } break; /* Line 1267 of yacc.c. */ #line 1519 "gen/y.tab.c" default: break; } YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc); YYPOPSTACK (yylen); yylen = 0; YY_STACK_PRINT (yyss, yyssp); *++yyvsp = yyval; /* Now `shift' the result of the reduction. Determine what state that goes to, based on the state we popped back to and the rule number reduced by. */ yyn = yyr1[yyn]; yystate = yypgoto[yyn - YYNTOKENS] + *yyssp; if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp) yystate = yytable[yystate]; else yystate = yydefgoto[yyn - YYNTOKENS]; goto yynewstate; /*------------------------------------. | yyerrlab -- here on detecting error | `------------------------------------*/ yyerrlab: /* If not already recovering from an error, report this error. */ if (!yyerrstatus) { ++yynerrs; #if ! YYERROR_VERBOSE yyerror (YY_("syntax error")); #else { YYSIZE_T yysize = yysyntax_error (0, yystate, yychar); if (yymsg_alloc < yysize && yymsg_alloc < YYSTACK_ALLOC_MAXIMUM) { YYSIZE_T yyalloc = 2 * yysize; if (! (yysize <= yyalloc && yyalloc <= YYSTACK_ALLOC_MAXIMUM)) yyalloc = YYSTACK_ALLOC_MAXIMUM; if (yymsg != yymsgbuf) YYSTACK_FREE (yymsg); yymsg = (char *) YYSTACK_ALLOC (yyalloc); if (yymsg) yymsg_alloc = yyalloc; else { yymsg = yymsgbuf; yymsg_alloc = sizeof yymsgbuf; } } if (0 < yysize && yysize <= yymsg_alloc) { (void) yysyntax_error (yymsg, yystate, yychar); yyerror (yymsg); } else { yyerror (YY_("syntax error")); if (yysize != 0) goto yyexhaustedlab; } } #endif } if (yyerrstatus == 3) { /* If just tried and failed to reuse look-ahead token after an error, discard it. */ if (yychar <= YYEOF) { /* Return failure if at end of input. */ if (yychar == YYEOF) YYABORT; } else { yydestruct ("Error: discarding", yytoken, &yylval); yychar = YYEMPTY; } } /* Else will try to reuse look-ahead token after shifting the error token. */ goto yyerrlab1; /*---------------------------------------------------. | yyerrorlab -- error raised explicitly by YYERROR. | `---------------------------------------------------*/ yyerrorlab: /* Pacify compilers like GCC when the user code never invokes YYERROR and the label yyerrorlab therefore never appears in user code. */ if (/*CONSTCOND*/ 0) goto yyerrorlab; /* Do not reclaim the symbols of the rule which action triggered this YYERROR. */ YYPOPSTACK (yylen); yylen = 0; YY_STACK_PRINT (yyss, yyssp); yystate = *yyssp; goto yyerrlab1; /*-------------------------------------------------------------. | yyerrlab1 -- common code for both syntax error and YYERROR. | `-------------------------------------------------------------*/ yyerrlab1: yyerrstatus = 3; /* Each real token shifted decrements this. */ for (;;) { yyn = yypact[yystate]; if (yyn != YYPACT_NINF) { yyn += YYTERROR; if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) { yyn = yytable[yyn]; if (0 < yyn) break; } } /* Pop the current state because it cannot handle the error token. */ if (yyssp == yyss) YYABORT; yydestruct ("Error: popping", yystos[yystate], yyvsp); YYPOPSTACK (1); yystate = *yyssp; YY_STACK_PRINT (yyss, yyssp); } if (yyn == YYFINAL) YYACCEPT; *++yyvsp = yylval; /* Shift the error token. */ YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp); yystate = yyn; goto yynewstate; /*-------------------------------------. | yyacceptlab -- YYACCEPT comes here. | `-------------------------------------*/ yyacceptlab: yyresult = 0; goto yyreturn; /*-----------------------------------. | yyabortlab -- YYABORT comes here. | `-----------------------------------*/ yyabortlab: yyresult = 1; goto yyreturn; #ifndef yyoverflow /*-------------------------------------------------. | yyexhaustedlab -- memory exhaustion comes here. | `-------------------------------------------------*/ yyexhaustedlab: yyerror (YY_("memory exhausted")); yyresult = 2; /* Fall through. */ #endif yyreturn: if (yychar != YYEOF && yychar != YYEMPTY) yydestruct ("Cleanup: discarding lookahead", yytoken, &yylval); /* Do not reclaim the symbols of the rule which action triggered this YYABORT or YYACCEPT. */ YYPOPSTACK (yylen); YY_STACK_PRINT (yyss, yyssp); while (yyssp != yyss) { yydestruct ("Cleanup: popping", yystos[*yyssp], yyvsp); YYPOPSTACK (1); } #ifndef yyoverflow if (yyss != yyssa) YYSTACK_FREE (yyss); #endif #if YYERROR_VERBOSE if (yymsg != yymsgbuf) YYSTACK_FREE (yymsg); #endif /* Make sure YYID is used. */ return YYID (yyresult); } #line 259 "comp.y" /* End of rules, more C code will follow now */ void initialize() { /* Create & initialize the abstract data structures */ tree = new SyntaxTree; symtab = new SymbolTable; } void cleanup() { /* Free objects */ delete tree; delete symtab; } int main() { int parseResult; initialize(); /* Start the parsing procedure */ parseResult = yyparse(); /* Dump the syntax tree & symbol table */ tree->Dump (stdout); printf("\n"); symtab->Dump (stdout); cleanup(); /* Return the exit code. Note that the exit code does not depend on parseResult only, but also on the result of your semantic checks */ return parseResult; } static void yyerror(const char *s) { fprintf(stderr, "line %d: %s\n", lineno, s); } int yywrap() { return(1); }