y.tab.c

编译原理课程设计之pp2语法分析程序

/* A Bison parser, made by GNU Bison 1.875d.  */

/* Skeleton parser for Yacc-like parsing with Bison,
   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004 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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* As a special exception, when this file is copied by Bison into a
   Bison output file, you may use that output file without restriction.
   This special exception was added by the Free Software Foundation
   in version 1.24 of Bison.  */

/* 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

/* Skeleton name.  */
#define YYSKELETON_NAME "yacc.c"

/* Pure parsers.  */
#define YYPURE 0

/* Using locations.  */
#define YYLSP_NEEDED 1



/* Tokens.  */
#ifndef YYTOKENTYPE
# define YYTOKENTYPE
   /* Put the tokens into the symbol table, so that GDB and other debuggers
      know about them.  */
   enum yytokentype {
     T_Void = 258,
     T_Bool = 259,
     T_Int = 260,
     T_Double = 261,
     T_String = 262,
     T_Class = 263,
     T_LessEqual = 264,
     T_GreaterEqual = 265,
     T_Equal = 266,
     T_NotEqual = 267,
     T_Dims = 268,
     T_And = 269,
     T_Or = 270,
     T_Null = 271,
     T_Extends = 272,
     T_This = 273,
     T_While = 274,
     T_For = 275,
     T_If = 276,
     T_Else = 277,
     T_Return = 278,
     T_Break = 279,
     T_New = 280,
     T_NewArray = 281,
     T_Print = 282,
     T_ReadInteger = 283,
     T_ReadLine = 284,
     T_Try = 285,
     T_Catch = 286,
     T_Throw = 287,
     T_Switch = 288,
     T_Case = 289,
     T_Default = 290,
     T_Identifier = 291,
     T_StringConstant = 292,
     T_IntConstant = 293,
     T_DoubleConstant = 294,
     T_BoolConstant = 295,
     UMINUS = 296,
     Lower_Else = 297
   };
#endif
#define T_Void 258
#define T_Bool 259
#define T_Int 260
#define T_Double 261
#define T_String 262
#define T_Class 263
#define T_LessEqual 264
#define T_GreaterEqual 265
#define T_Equal 266
#define T_NotEqual 267
#define T_Dims 268
#define T_And 269
#define T_Or 270
#define T_Null 271
#define T_Extends 272
#define T_This 273
#define T_While 274
#define T_For 275
#define T_If 276
#define T_Else 277
#define T_Return 278
#define T_Break 279
#define T_New 280
#define T_NewArray 281
#define T_Print 282
#define T_ReadInteger 283
#define T_ReadLine 284
#define T_Try 285
#define T_Catch 286
#define T_Throw 287
#define T_Switch 288
#define T_Case 289
#define T_Default 290
#define T_Identifier 291
#define T_StringConstant 292
#define T_IntConstant 293
#define T_DoubleConstant 294
#define T_BoolConstant 295
#define UMINUS 296
#define Lower_Else 297




/* Copy the first part of user declarations.  */
#line 11 "parser.y"


/* Just like lex, the text within this first region delimited by %{ and %}
 * is assumed to be C/C++ code and will be copied verbatim to the y.tab.c
 * file ahead of the definitions of the yyparse() function. Add other header
 * file inclusions or C++ variable declarations/prototypes that are needed
 * by your code here.
 */
#include "scanner.h" // for yylex
#include "parser.h"
#include "errors.h"
Program *program;

void yyerror(char *msg); // standard error-handling routine



/* 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

#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
#line 43 "parser.y"
typedef union YYSTYPE {
    int integerConstant;
    bool boolConstant;
    char *stringConstant;
    double doubleConstant;
    char identifier[MaxIdentLen+1]; // +1 for terminating null

    Decl *decl;
    List<Decl*> *declList;
    List<VarDecl*> *varDeclList;
    List<Expr*> *exprList;

    VarDecl *varDecl;
    Type *type;
    Identifier	*ident;
    FnDecl *fnDecl;

    Stmt *stmt;
    List<Stmt*> *stmtList;
    StmtBlock *stmtBlock;

    IfStmt *ifStmt;
    WhileStmt *whileStmt;
    ForStmt *forStmt;
    ReturnStmt *returnStmt;
    BreakStmt *breakStmt;
    PrintStmt *printStmt;
    TryStmt *tryStmt;
    CatchStmt *catchStmt;
    ThrowStmt *throwStmt;
    SwitchStmt *switchStmt;                                 
    CaseStmt *caseStmt;                                     
    DefaultStmt *defaultStmt; 
    SwitchBody *switchBody;
    List<CatchStmt*> *catchStmtList;
    List<CaseStmt*>  *caseStmtList;

    Expr *expr;
    LValue *LV;
    Call *call;
} YYSTYPE;
/* Line 191 of yacc.c.  */
#line 219 "y.tab.c"
# define yystype YYSTYPE /* obsolescent; will be withdrawn */
# define YYSTYPE_IS_DECLARED 1
# define YYSTYPE_IS_TRIVIAL 1
#endif

#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
typedef struct YYLTYPE
{
  int first_line;
  int first_column;
  int last_line;
  int last_column;
} YYLTYPE;
# define yyltype YYLTYPE /* obsolescent; will be withdrawn */
# define YYLTYPE_IS_DECLARED 1
# define YYLTYPE_IS_TRIVIAL 1
#endif


/* Copy the second part of user declarations.  */


/* Line 214 of yacc.c.  */
#line 243 "y.tab.c"

#if ! defined (yyoverflow) || YYERROR_VERBOSE

# ifndef YYFREE
#  define YYFREE free
# endif
# ifndef YYMALLOC
#  define YYMALLOC malloc
# endif

/* The parser invokes alloca or malloc; define the necessary symbols.  */

# ifdef YYSTACK_USE_ALLOCA
#  if YYSTACK_USE_ALLOCA
#   define YYSTACK_ALLOC alloca
#  endif
# else
#  if defined (alloca) || defined (_ALLOCA_H)
#   define YYSTACK_ALLOC alloca
#  else
#   ifdef __GNUC__
#    define YYSTACK_ALLOC __builtin_alloca
#   endif
#  endif
# endif

# ifdef YYSTACK_ALLOC
   /* Pacify GCC's `empty if-body' warning. */
#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
# else
#  if defined (__STDC__) || defined (__cplusplus)
#   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
#   define YYSIZE_T size_t
#  endif
#  define YYSTACK_ALLOC YYMALLOC
#  define YYSTACK_FREE YYFREE
# endif
#endif /* ! defined (yyoverflow) || YYERROR_VERBOSE */


#if (! defined (yyoverflow) \
     && (! defined (__cplusplus) \
	 || (defined (YYLTYPE_IS_TRIVIAL) && YYLTYPE_IS_TRIVIAL \
             && defined (YYSTYPE_IS_TRIVIAL) && YYSTYPE_IS_TRIVIAL)))

/* A type that is properly aligned for any stack member.  */
union yyalloc
{
  short int yyss;
  YYSTYPE yyvs;
    YYLTYPE yyls;
};

/* 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 (short int) + sizeof (YYSTYPE) + sizeof (YYLTYPE))	\
      + 2 * 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					\
	{					\
	  register YYSIZE_T yyi;		\
	  for (yyi = 0; yyi < (Count); yyi++)	\
	    (To)[yyi] = (From)[yyi];		\
	}					\
      while (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 (0)

#endif

#if defined (__STDC__) || defined (__cplusplus)
   typedef signed char yysigned_char;
#else
   typedef short int yysigned_char;
#endif

/* YYFINAL -- State number of the termination state. */
#define YYFINAL  19
/* YYLAST -- Last index in YYTABLE.  */
#define YYLAST   818

/* YYNTOKENS -- Number of terminals. */
#define YYNTOKENS  63
/* YYNNTS -- Number of nonterminals. */
#define YYNNTS  42
/* YYNRULES -- Number of rules. */
#define YYNRULES  117
/* YYNRULES -- Number of states. */
#define YYNSTATES  233