some refactoring in interpreter
some refactoring in interpreter

nbIxMaN/YaccConstructor,fedorovr/YaccConstructor,nbIxMaN/YaccConstructor,VereshchaginaE/YaccConstructor,melentyev/YaccConstructor,YaccConstructor/YaccConstructor,Albiglittle/YaccConstructor,fedorovr/YaccConstructor,RomanBelkov/YaccConstructor,melentyev/YaccConstructor,RomanBelkov/YaccConstructor,VereshchaginaE/YaccConstructor,sanyaade-g2g-repos/YaccConstructor,YaccConstructor/YaccConstructor,melentyev/YaccConstructor,Albiglittle/YaccConstructor,YaccConstructor/YaccConstructor,fedorovr/YaccConstructor,VereshchaginaE/YaccConstructor,sanyaade-g2g-repos/YaccConstructor,RomanBelkov/YaccConstructor,nbIxMaN/YaccConstructor,sanyaade-g2g-repos/YaccConstructor,Albiglittle/YaccConstructor