http://d.puremagic.com/issues/show_bug.cgi?id=1827



--- Comment #7 from Trass3r <mrmoc...@gmx.de> 2012-01-05 14:01:49 PST ---
(In reply to comment #5)
> The nastiest hack that I see is
> 
>     template MyTemplate(T:T)
> 
> Hands up everyone who knows what that means, and in what way  (T:T) is
> different from (T)? If you don't know, can you guess?
> 
> Well, the answer is that (T) will match int, const(int) and
> invariant(int), but in all three cases, T will be int. Whereas, (T:T)
> will match the same three things, but now T will be int, const(int)
> and invariant(int) respectively.

At least that's not true anymore.

template Bla(T:T)
{
    pragma(msg, T);
}

template Blub(T)
{
    pragma(msg, T);
}

alias Bla!(int) A;
alias Bla!(const int) B;
alias Bla!(immutable int) C;

alias Blub!(int) D;
alias Blub!(const int) E;
alias Blub!(immutable int) F;

$ dmd -c test7.d 
int
const(int)
immutable(int)
int
const(int)
immutable(int)

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