public PrgState<T> OneStep()
{
lock(baton)
{
if (exeStack.IsEmpty()) return this;
IStmt crtStmt = (IStmt)exeStack.Pop();
return crtStmt.Execute(this);
}
}
public ProgramState OneStep(ProgramState prgState)
{
MyIStack <IStatement> exeStack = prgState.getExecutionStack();
if (exeStack.IsEmpty())
{
throw new Exception("stack is empty");
}
return(exeStack.Pop().Execute(prgState));
}
public PrgState OneStep(PrgState state)
{
MyIStack <IStmt> stk = state.GetExeStack();
if (stk.IsEmpty())
{
throw new MyException("Stack is empty");
}
IStmt crtStmt = stk.Pop();
return(crtStmt.Execute(state));
}
public bool IsNotCompleted()
{
return(!exeStack.IsEmpty());
}