constant expression parser used for the C preprocessor More...

#include <src/constexp.h>

Classes
struct	Private

Public Member Functions
	ConstExpressionParser ()
	~ConstExpressionParser ()
bool	parse (const char *fileName, int line, const std::string &expression, const std::string &orgExpression)

Private Attributes
std::unique_ptr< Private >	p

Detailed Description

constant expression parser used for the C preprocessor

Definition at line 25 of file constexp.h.

Constructor & Destructor Documentation

◆ ConstExpressionParser()

ConstExpressionParser::ConstExpressionParser ( )

Definition at line 129 of file constexp.l.

                                             : p(std::make_unique<Private>())
{
  constexpYYlex_init_extra(&p->constexpYY_extra, &p->yyscanner);
}

References p.

◆ ~ConstExpressionParser()

ConstExpressionParser::~ConstExpressionParser ( )

Definition at line 134 of file constexp.l.

{
  constexpYYlex_destroy(p->yyscanner);
}

References p.

Member Function Documentation

◆ parse()

bool ConstExpressionParser::parse	(	const char *	fileName,
		int	line,
		const std::string &	expression,
		const std::string &	orgExpression )

Definition at line 139 of file constexp.l.

{
  struct yyguts_t *yyg = (struct yyguts_t*)p->yyscanner;
 
#ifdef FLEX_DEBUG
  constexpYYset_debug(Debug::isFlagSet(Debug::Lex_constexp)?1:0,p->yyscanner);
#endif
 
  yyextra->constExpFileName = fileName;
  yyextra->constExpLineNr = lineNr;
  yyextra->orgString = orgStr;
  yyextra->inputString = s;
  yyextra->inputPosition = 0;
  constexpYYrestart( yyin, p->yyscanner );
 
  DebugLex debugLex(Debug::Lex_constexp, __FILE__, fileName);
  //printf("Expression: '%s'\n",qPrint(s));
 
  constexpYYparse(p->yyscanner);
 
  //printf("Result: %ld\n",(long)g_resultValue);
  bool result = static_cast<long>(yyextra->resultValue)!=0;
 
  return result;
}