On Monday, April 02, 2012 05:41:00 Alex Rønne Petersen wrote: > On 30-03-2012 19:28, Jonathan M Davis wrote: > > On Friday, March 30, 2012 16:27:44 simendsjo wrote: > >> Is opImplicitCastTo a planned feature? > >> It's only used in this type as I can see, and it doesn't add implicit > >> casting. > > > > It's been discussed, but I don't think that it's ever been agreed upon. In > > theory, alias this is meant to deal with implicit casts. I don't know whay > > anything in Phobos would have such a function. And I don't know what the > > point of std.typecons.Ref really is. It's undocumented (and clearly is > > _intended_ to be undocumented given what the comment is started with). I > > suspect that it's an old idea that just hasn't been cleaned out. If > > you'll notice, it also has opDot, which is being removed from the > > language. > > > > - Jonathan M Davis > > But you can only have one alias this per type. It is outright > incompatible with the idea of implicit cast operators. It's like > restricting opCast to only one overload per function - a > not-very-pragmatic decision if you ask me...
alias this is not supposed to be restricted such that you can only have one per type. That's a temporary, implementation problem. TDPL specifically talks about having multiple alias thises per type. - Jonathan M Davis
