How to alias for identity

[Martin Nowak]

On Wed, 26 Oct 2011 22:18:29 +0200, Timon Gehr <timon.gehr at gmx.ch> wrote:

> On 10/26/2011 09:41 PM, Martin Nowak wrote:
>> I was using some templates to declare different parameters sets.
>>
>> template unitA() {...}
>> template unitB() {...}
>> template unitC() {...}
>>
>> I have a generic function that is parameterized by these units.
>> void foo(alias unit) {...}
>>
>> Now unitA gets a specialization.
>>
>> void foo(alias unit:unitA!()) {}
>>
>> But here I'm a little stuck because this won't work in my case due to a
>> bug (there are more parameters).
>> http://d.puremagic.com/issues/show_bug.cgi?id=6701
>>
>> Does anybody know of a way to test an alias for identity.
>>
>> void foo(alias unit) if(unit == unitA!()) {} // won't work of course
>>
>> martin
>
> This will do the job:
>
> void foo(alias unit)() if(unit.mangleof == unitA!().mangleof) {}

Thanks, better than the .stringof I resorted to.