Operator as and generic classes

Posted by abatishchev on Stack Overflow See other posts from Stack Overflow or by abatishchev
Published on 2009-03-28T20:27:06Z Indexed on 2010/04/07 13:43 UTC
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I'm writing .NET On-the-Fly compiler for CLR scripting and want execution method make generic acceptable:

object Execute()
{
  return type.InvokeMember(..);
}

T Execute<T>()
{
  return Execute() as T; /* doesn't work:
  The type parameter 'T' cannot be used with the 'as' operator because
  it does not have a class type constraint nor a 'class' constraint */

  // also neither typeof(T) not T.GetType(), so on are possible

  return (T) Execute(); // ok
}

But I think operator as will be very useful: if result type isn't T method will return null, instead of an exception! Is it possible to do?

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