protected override Expression VisitMethodCall(MethodCallExpression node)
{
var obj = Visit(node.Object);
var args = Visit(node.Arguments, Visit);
if (obj != node.Object || args != node.Arguments)
{
node = Expression.Call(obj, node.Method, args);
}
Expression final;
switch (node.Method.Name)
{
case FilterMethod.Contains:
case FilterMethod.Equals:
final = node.Object == null ? node : ExpressionHelpers.BoolIfNotNull(node.Object, node);
break;
case FilterMethod.ToString:
final = node.Object == null ? node : ExpressionHelpers.NullConditional(node.Object, node);
break;
default:
final = CatchNullReference(node);
break;
}
return(final);
}