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%{
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
/*
This file must be translated to C and modified to build everywhere.
Run bison like this:
bison --yacc --name-prefix=cmExpr_yy --defines=cmExprParserTokens.h -ocmExprParser.cxx cmExprParser.y
Modify cmExprParser.cxx:
- remove TABs
- remove use of the 'register' storage class specifier
- add __HP_aCC to the #if test for yyerrorlab warning suppression
*/
/* Configure the parser to use a lexer object. */
#define YYPARSE_PARAM yyscanner
#define YYLEX_PARAM yyscanner
#define YYERROR_VERBOSE 1
#define cmExpr_yyerror(x) \
cmExprError(yyscanner, x)
#define yyGetParser (cmExpr_yyget_extra(yyscanner))
/*-------------------------------------------------------------------------*/
#include "cmExprParserHelper.h" /* Interface to parser object. */
#include "cmExprLexer.h" /* Interface to lexer object. */
#include "cmExprParserTokens.h" /* Need YYSTYPE for YY_DECL. */
#include <math.h>
/* Forward declare the lexer entry point. */
YY_DECL;
/* Internal utility functions. */
static void cmExprError(yyscan_t yyscanner, const char* message);
#define YYDEBUG 1
//#define YYMAXDEPTH 100000
//#define YYINITDEPTH 10000
/* Disable some warnings in the generated code. */
#ifdef _MSC_VER
# pragma warning (disable: 4102) /* Unused goto label. */
# pragma warning (disable: 4065) /* Switch statement contains default but no case. */
#endif
%}
/* Generate a reentrant parser object. */
%pure_parser
/*-------------------------------------------------------------------------*/
/* Tokens */
%token exp_PLUS
%token exp_MINUS
%token exp_TIMES
%token exp_DIVIDE
%token exp_MOD
%token exp_SHIFTLEFT
%token exp_SHIFTRIGHT
%token exp_OPENPARENT
%token exp_CLOSEPARENT
%token exp_OR;
%token exp_AND;
%token exp_XOR;
%token exp_NOT;
%token exp_NUMBER;
/*-------------------------------------------------------------------------*/
/* grammar */
%%
Start:
exp
{
yyGetParser->SetResult($<Number>1);
}
exp:
bitwiseor
{$<Number>$ = $<Number>1;}
|
exp exp_OR bitwiseor
{$<Number>$ = $<Number>1 | $<Number>3;}
bitwiseor:
bitwisexor
{$<Number>$ = $<Number>1;}
|
bitwiseor exp_XOR bitwisexor
{$<Number>$ = $<Number>1 ^ $<Number>3;}
bitwisexor:
bitwiseand
{$<Number>$ = $<Number>1;}
|
bitwisexor exp_AND bitwiseand
{$<Number>$ = $<Number>1 & $<Number>3;}
bitwiseand:
shift
{$<Number>$ = $<Number>1;}
|
bitwiseand exp_SHIFTLEFT shift
{$<Number>$ = $<Number>1 << $<Number>3;}
|
bitwiseand exp_SHIFTRIGHT shift
{$<Number>$ = $<Number>1 >> $<Number>3;}
shift:
term
{$<Number>$ = $<Number>1;}
|
shift exp_PLUS term
{$<Number>$ = $<Number>1 + $<Number>3;}
|
shift exp_MINUS term
{$<Number>$ = $<Number>1 - $<Number>3;}
term:
factor
{$<Number>$ = $<Number>1;}
|
term exp_TIMES factor
{$<Number>$ = $<Number>1 * $<Number>3;}
|
term exp_DIVIDE factor
{$<Number>$ = $<Number>1 / $<Number>3;}
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term exp_MOD factor
{$<Number>$ = $<Number>1 % $<Number>3;}
factor:
exp_NUMBER
{$<Number>$ = $<Number>1;}
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exp_OPENPARENT exp exp_CLOSEPARENT
{$<Number>$ = $<Number>2;}
;
%%
/* End of grammar */
/*--------------------------------------------------------------------------*/
void cmExprError(yyscan_t yyscanner, const char* message)
{
yyGetParser->Error(message);
}
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