public override bool Interpret(Context context)
{
if (_value.HasValue)
{
return (bool) _value;
}
throw new InvalidOperationException();
}
public override bool Interpret(Context context)
{
bool xVar;
bool yVar;
switch (_scenario)
{
case Scenario.VarVar:
xVar = context.GetValue(_xVarName);
yVar = context.GetValue(_yVarName);
break;
case Scenario.VarExp:
xVar = context.GetValue(_xVarName);
yVar = _yExp.Interpret(context);
break;
case Scenario.ExpVar:
xVar = _xExp.Interpret(context);
yVar = context.GetValue(_yVarName);
break;
case Scenario.ExpExp:
xVar = _xExp.Interpret(context);
yVar = _yExp.Interpret(context);
break;
default:
throw new InvalidOperationException();
}
switch (_op)
{
case BinaryOp.And:
return xVar && yVar;
case BinaryOp.Or:
return xVar || yVar;
default:
throw new InvalidOperationException();
}
}
public override bool Interpret(Context context)
{
throw new NullReferenceException();
}