/// <summary>
/// Forwards the unary operation.
/// </summary>
/// <param name="binder"></param>
/// <param name="result"></param>
/// <returns></returns>
public override bool TryUnaryOperation(UnaryOperationBinder binder, out object result)
{
result = null;
try
{
result = Impromptu.InvokeUnaryOperator(binder.Operation, CallTarget);
return(true);
}
catch (RuntimeBinderException)
{
return(false);
}
}
public object GetResult(Invocation invocation)
{
(new PermissionSet(PermissionState.Unrestricted)).Assert();
object result = null;
string name = invocation.Name.Name;
object[] args = invocation.Args;
Type[] paramTypes = args.Select(o => o.GetType()).ToArray();
try
{
if (invocation.Kind == InvocationKind.NotSet && invocation.Name.Name == "_BinaryOperator")
{ // We use that for operators
var exp = (ExpressionType)args[0];
object other = args[1];
result = Impromptu.InvokeBinaryOperator(_component, exp, other);
}
else if (invocation.Kind == InvocationKind.NotSet && invocation.Name.Name == "_UnaryOperator")
{ // We use that for operators
var exp = (ExpressionType)args[0];
result = Impromptu.InvokeUnaryOperator(exp, _component);
}
else
{
// First we try to resolve via DLR
dynamic target = _component;
result = invocation.InvokeWithStoredArgs(_component);
}
}
catch (RuntimeBinderException)
{
// DLR doesn't like some kind of functions,
// expecially because we have casted the component to object...
bool found = false;
switch (invocation.Kind)
{
case InvocationKind.Convert:
var targetType = (Type)args[0];
bool tExplict = false;
if (args.Length == 2)
{
tExplict = (bool)args[1];
}
// try to find explicit or implicit operator.
try
{
result = DynamicCast(_component, targetType);
found = true;
}
catch (Exception)
{
found = false;
}
break;
//case InvocationKind.IsEvent:
//case InvocationKind.AddAssign:
//case InvocationKind.SubtractAssign:
//case InvocationKind.Invoke:
//case InvocationKind.InvokeAction:
//case InvocationKind.InvokeUnknown:
//case InvocationKind.InvokeMember: // TODO: add testcase
//case InvocationKind.InvokeMemberAction: // TODO: add testcase
//case InvocationKind.GetIndex: // TODO: add testcase
//case InvocationKind.SetIndex: // TODO: add testcase
case InvocationKind.Get:
case InvocationKind.Set:
case InvocationKind.InvokeMemberUnknown:
{
if (!found)
{
if (!TryFindInvokeMember(_runtimeType, name, args, paramTypes, out result))
{
// search all interfaces as well
foreach (var @interface in _runtimeType.GetInterfaces().Where(i => i.IsPublic))
{
if (TryFindInvokeMember(@interface, name, args, paramTypes, out result))
{
found = true;
break;
}
}
}
else
{
found = true;
}
}
}
break;
default:
break;
}
if (!found)
{
if (_allowMissing)
{
return(RazorDynamicObject.Create("", _allowMissing));
}
throw;
}
}
if (RazorDynamicObject.IsPrimitive(result))
{
return(result);
}
else
{
return(RazorDynamicObject.Create(result, _allowMissing));
}
}