qualified type names for mixins

[Jonathan Marler via Digitalmars-d]

On Thursday, 15 June 2017 at 21:54:44 UTC, Adam D. Ruppe wrote:
> On Thursday, 15 June 2017 at 21:26:38 UTC, Jonathan Marler 
> wrote:
>> The common use case is when you'd like to mixin a type when it 
>> is passed to a template.
>
> That's also the most common wrong case. If it is passed to a 
> template, you have a local name that you should use because it 
> will work despite import or privacy restrictions that would 
> break with the full name. So....

Doesn't work with eponymous templates, like std.traits.Flag.  For 
example, make this code work:

import std.stdio, std.traits;

template TypeWrapper(T)
{
     alias TypeWrapper = T;
}
void main()
{
     writefln(TypeWrapper!bool.stringof); // Works
     writefln(TypeWrapper!(Flag!"yes").stringof); // Doesn't work
}

>
>> It uses T.stringof in some cases
>
> ...just use T. Drop the stringof and you'll find it much easier 
> and correct.

When you mixin the type, you need a "string', T is not a string, 
it's an alias to a type.