I know this is an old issue, and I found this old bug to describe it
(helping someone in a D.learn thread):
http://d.puremagic.com/issues/show_bug.cgi?id=3464
But my question is, what is the value of T in *expected* usage. The bug
gives the example:
is(typeof(*T.init) == function)
to test for a function pointer, but I tried this:
is(main == function)
And that doesn't work, but this does:
is(typeof(main) == function)
So, my question is, what is typeof(main)? I tried pragma(msg,
typeof(main).stringof) and I get "void()()", which doesn't compile.
Given how ridiculously special-cased is expressions are anyways, can we
just define is(T == function) to do something expected? I can't think of
a single "normal" use case that doesn't involve typeof or init.
I'd like to see either of these work instead of what we have:
is(main == function)
is(&main == function)
I think the latter would be the most useful, and consistent with
delegates, especially since we got rid of declaring a function type (not
function pointer type) in recent times (I think Don did this to prevent
some kooky C legacy bug).
-Steve
