/data/refman/pasoursint/CMSSW_5_3_1/src/CommonTools/Utils/src/FunctionSetter.h

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#ifndef CommonTools_Utils_FunctionSetter_h
#define CommonTools_Utils_FunctionSetter_h
/* \class reco::parser::FunctionSetter
 *
 * Function setter
 *
 * \author Luca Lista, INFN
 *
 * \version $Revision: 1.2 $
 *
 */
#include "CommonTools/Utils/src/Function.h"
#include "CommonTools/Utils/src/FunctionStack.h"

namespace reco {
  namespace parser {    
    struct FunctionSetter {
      FunctionSetter(Function fun, FunctionStack& stack):
        fun_(fun), stack_(stack) {}
      
      void operator()(const char *, const char *) const { 
#ifdef BOOST_SPIRIT_DEBUG 
        BOOST_SPIRIT_DEBUG_OUT << "pushing math function: " << functionNames[ fun_ ] << std::endl;
#endif
        stack_.push_back(fun_); 
      }
    private:
      Function fun_;
      FunctionStack & stack_;
    };

    struct FunctionSetterCommit { 
        FunctionSetterCommit(FunctionStack& stackFrom, FunctionStack& stackTo):
            from_(stackFrom), to_(stackTo) {}
        void operator()(const char &) const { 
            to_.push_back(from_.back());
            from_.clear();
        }
        private:
            FunctionStack & from_;
            FunctionStack & to_;
    };
  }
}

#endif