175 lines
3.9 KiB
Plaintext
175 lines
3.9 KiB
Plaintext
%{
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/*=========================================================================
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Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
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Language: C++
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Date: $Date$
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Version: $Revision$
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Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
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See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notices for more information.
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=========================================================================*/
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/*
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This file must be translated to C and modified to build everywhere.
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Run bison like this:
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bison --yacc --name-prefix=cmExpr_yy --defines=cmExprParserTokens.h -ocmExprParser.cxx cmExprParser.y
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Modify cmExprParser.cxx:
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- remove TABs
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- add __HP_aCC to the #if test for yyerrorlab warning suppression
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*/
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/* Configure the parser to use a lexer object. */
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#define YYPARSE_PARAM yyscanner
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#define YYLEX_PARAM yyscanner
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#define YYERROR_VERBOSE 1
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#define cmExpr_yyerror(x) \
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cmExprError(yyscanner, x)
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#define yyGetParser (cmExpr_yyget_extra(yyscanner))
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/*-------------------------------------------------------------------------*/
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#include "cmExprParserHelper.h" /* Interface to parser object. */
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#include "cmExprLexer.h" /* Interface to lexer object. */
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#include "cmExprParserTokens.h" /* Need YYSTYPE for YY_DECL. */
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#include <math.h>
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/* Forward declare the lexer entry point. */
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YY_DECL;
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/* Internal utility functions. */
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static void cmExprError(yyscan_t yyscanner, const char* message);
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#define YYDEBUG 1
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//#define YYMAXDEPTH 100000
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//#define YYINITDEPTH 10000
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/* Disable some warnings in the generated code. */
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#ifdef __BORLANDC__
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# pragma warn -8004 /* Variable assigned a value that is not used. */
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# pragma warn -8008 /* condition always returns true */
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# pragma warn -8060 /* possibly incorrect assignment */
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# pragma warn -8066 /* unreachable code */
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#endif
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#ifdef _MSC_VER
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# pragma warning (disable: 4102) /* Unused goto label. */
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# pragma warning (disable: 4065) /* Switch statement contains default but no case. */
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#endif
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%}
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/* Generate a reentrant parser object. */
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%pure_parser
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/*-------------------------------------------------------------------------*/
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/* Tokens */
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%token exp_PLUS
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%token exp_MINUS
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%token exp_TIMES
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%token exp_DIVIDE
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%token exp_MOD
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%token exp_SHIFTLEFT
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%token exp_SHIFTRIGHT
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%token exp_OPENPARENT
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%token exp_CLOSEPARENT
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%token exp_OR;
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%token exp_AND;
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%token exp_XOR;
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%token exp_NOT;
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%token exp_NUMBER;
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/*-------------------------------------------------------------------------*/
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/* grammar */
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%%
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Start:
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exp
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{
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yyGetParser->SetResult($<Number>1);
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}
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exp:
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bitwiseor
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{$<Number>$ = $<Number>1;}
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exp exp_OR bitwiseor
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{$<Number>$ = $<Number>1 | $<Number>3;}
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bitwiseor:
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bitwisexor
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{$<Number>$ = $<Number>1;}
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bitwiseor exp_XOR bitwisexor
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{$<Number>$ = $<Number>1 ^ $<Number>3;}
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bitwisexor:
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bitwiseand
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{$<Number>$ = $<Number>1;}
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bitwisexor exp_AND bitwiseand
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{$<Number>$ = $<Number>1 & $<Number>3;}
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bitwiseand:
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shift
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{$<Number>$ = $<Number>1;}
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bitwiseand exp_SHIFTLEFT shift
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{$<Number>$ = $<Number>1 << $<Number>3;}
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bitwiseand exp_SHIFTRIGHT shift
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{$<Number>$ = $<Number>1 >> $<Number>3;}
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shift:
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term
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{$<Number>$ = $<Number>1;}
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shift exp_PLUS term
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{$<Number>$ = $<Number>1 + $<Number>3;}
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shift exp_MINUS term
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{$<Number>$ = $<Number>1 - $<Number>3;}
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term:
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factor
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{$<Number>$ = $<Number>1;}
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term exp_TIMES factor
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{$<Number>$ = $<Number>1 * $<Number>3;}
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term exp_DIVIDE factor
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{$<Number>$ = $<Number>1 / $<Number>3;}
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term exp_MOD factor
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{$<Number>$ = $<Number>1 % $<Number>3;}
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factor:
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exp_NUMBER
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{$<Number>$ = $<Number>1;}
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exp_OPENPARENT exp exp_CLOSEPARENT
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{$<Number>$ = $<Number>2;}
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;
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%%
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/* End of grammar */
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/*--------------------------------------------------------------------------*/
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void cmExprError(yyscan_t yyscanner, const char* message)
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{
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yyGetParser->Error(message);
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}
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