Ah, simple solution to unittests inside templates

[Nick Treleaven via Digitalmars-d]

On Saturday, 17 September 2016 at 17:22:52 UTC, Andrei 
Alexandrescu wrote:
>     ///
>     static if (is(T == int)) unittest
>     {
>         Awesome awesome;
>         awesome.awesome;
>     }
> }
>
> The unittest documentation is nicely generated. The unittest 
> code itself is only generated for one instantiation.

Besides the other comments, we still have to instantiate 
Awesome!int somewhere for the tests to run, which could be 
forgotten or improperly done, failing silently. (Also int is 
arbitrary, unhelpful for the uninitiated).