Combining Delegate and Functions

[Eric Poggel]

Moritz Warning wrote:
> On Tue, 30 Jun 2009 11:38:21 -0400, Jesse Phillips wrote:
> 
>> So looking at a post on StackOverflow about D gatchas:
>> http://stackoverflow.com/questions/743319/why-isnt-the-d-language-
> picking-up/1059780#1059780
>> "functions that form closures or are attached to objects (ie. methods)
>> are not the same as regular functions, instead they are called
>> delegates, and you must be aware of the differences."
>>
>> I seem to recall the distinction was going to be going away or
>> minimized. Is this already done? Will it be going into D2?
> 
> fwiw, that's what I use to convert a function to a delegate (not my 
> invention):
> 
> R delegate(T) toDg(R, T...)(R function(T) fp)
> {
> 	struct dg
> 	{
> 		R opCall(T t)
> 		{
> 			return (cast(R function(T)) this) (t);
> 		}
> 	}
> 	
> 	R delegate(T) t;
> 	t.ptr = fp;
> 	t.funcptr = &dg.opCall;
> 	return t;
> }
> 
> Note that this won't work for ref arguments.

I use this too, but my point was that it'd be nice if hacks like this 
weren't required, e.g. by doing away with functions except for C 
compatibility and making everything a delegate internally.