public void Visit(BinaryExpression expression)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
expression.LeftExpression.Accept(this);
object left = result;
expression.RightExpression.Accept(this);
object right = result;
if (left is int && right is int)
{
switch (expression.Type)
{
case BinaryExpressionType.Plus:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) + Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.Minus:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) - Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.Multiply:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) * Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.Div:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) / Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.Mod:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) % Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.ShiftLeft:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) << Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.ShiftRight:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) >> Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.GreaterOrEqual:
result = (Convert.ToInt32(left, CultureInfo.InvariantCulture) >= Convert.ToInt32(right, CultureInfo.InvariantCulture)) ? 1 : 0;
break;
case BinaryExpressionType.LesserOrEqual:
result = (Convert.ToInt32(left, CultureInfo.InvariantCulture) <= Convert.ToInt32(right, CultureInfo.InvariantCulture)) ? 1 : 0;
break;
case BinaryExpressionType.Greater:
result = (Convert.ToInt32(left, CultureInfo.InvariantCulture) > Convert.ToInt32(right, CultureInfo.InvariantCulture)) ? 1 : 0;
break;
case BinaryExpressionType.Lesser:
result = (Convert.ToInt32(left, CultureInfo.InvariantCulture) < Convert.ToInt32(right, CultureInfo.InvariantCulture)) ? 1 : 0;
break;
case BinaryExpressionType.Equal:
result = (Convert.ToInt32(left, CultureInfo.InvariantCulture) == Convert.ToInt32(right, CultureInfo.InvariantCulture)) ? 1 : 0;
break;
case BinaryExpressionType.NotEqual:
result = (Convert.ToInt32(left, CultureInfo.InvariantCulture) != Convert.ToInt32(right, CultureInfo.InvariantCulture)) ? 1 : 0;
break;
case BinaryExpressionType.BitXor:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) ^ Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.BitAnd:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) & Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.BitOr:
result = Convert.ToInt32(left, CultureInfo.InvariantCulture) | Convert.ToInt32(right, CultureInfo.InvariantCulture);
break;
case BinaryExpressionType.And:
bool andResult = Convert.ToBoolean(left, CultureInfo.InvariantCulture) && Convert.ToBoolean(right, CultureInfo.InvariantCulture);
result = Convert.ToInt32(andResult);
break;
case BinaryExpressionType.Or:
bool orResult = Convert.ToBoolean(left, CultureInfo.InvariantCulture) || Convert.ToBoolean(right, CultureInfo.InvariantCulture);
result = Convert.ToInt32(orResult);
break;
default:
throw new ExpressionEvaluatorException(
string.Format(CultureInfo.InvariantCulture, "binary operation '{0}' is not supported.", expression.Type));
}
}
else
{
result = string.Format(CultureInfo.InvariantCulture, "{0} {1} {2}",
left,
GetBinaryOperatorString(expression.Type),
right);
}
}
public void Visit(BinaryExpression expression)
{
throw new NotImplementedException();
}
