Re: Member function pointers

[Jacob Carlborg]

On 2013-06-10 14:32, Michel Fortin wrote:

Type-safety. I mean, you can do this if you want:
     auto funcptr = &Object.toString;
     auto object = new Object;

     // now call our function using object
     string delegate() deleg;
     deleg.ptr = cast(void*)object;
     deleg.funcptr = funcptr;

but this is not type-safe: the funcptr type ("string function()") is
actually wrong (it'll only work if called from a delegate) and the
object pointer the in the delegate is a void*. All Manu is asking is
that funcptr is of a correct type so you can call it directly by
supplying "this" as an argument, like this:

     funcptr(object);

The problem is that this "correct type" for the function pointer does
not exist currently. Calling a member function uses a different ABI, so
the type needs to know somehow its a pointer to a member function (and
that its first parameter is "this"), otherwise the generated code at the
call site will be all wrong.

Then he's asking for (more) type safe delegates and support for C++ 
member function pointers.

--
/Jacob Carlborg