Adding pure to a function type

[jmh530]

On Thursday, 26 October 2017 at 15:47:03 UTC, Andrei Alexandrescu 
wrote:
>
> s/less hideous/even more awesome/
>
> No need to be testy :o).
>
> I noticed there's no way to say "just leave linkage as is". I 
> tried SetFunctionAttributes!(typeof(&impl), null, 
> FunctionAttribute.pure_) and 
> SetFunctionAttributes!(typeof(&impl), "", 
> FunctionAttribute.pure_) but neither worked. Should I file a 
> bug?
>
>
> Andrei

How about:

SetFunctionAttributes!(typeof(&impl), functionLinkage!(&impl), 
FunctionAttribute.pure_)