public override IValue Evaluate()
{
var left = _left.Evaluate();
var right = _right.Evaluate();
if (left != null && left.AsDecimal== 0 && right == null)
{
return new DecimalValue(0);
}
else if (right != null && right.AsDecimal== 0 && left == null)
{
return new DecimalValue(0);
}
else if (left == null || right == null)
{
return null;
}
else if (left.ValueType == ValueType.Bool && right.ValueType == ValueType.Bool)
{
var leftNumber = Convert.ToInt64(left.AsDecimal);
var rightNumber = Convert.ToInt64(right.AsDecimal);
return new BoolValue(new DecimalValue(leftNumber & rightNumber).AsBool);
}
else
{
var leftNumber = Convert.ToInt64(left.AsDecimal);
var rightNumber = Convert.ToInt64(right.AsDecimal);
return new DecimalValue(leftNumber & rightNumber);
}
}
}