Now that's a DIP that could use some love

[Nicholas Wilson]

On Monday, 14 September 2020 at 00:00:15 UTC, Adam D. Ruppe wrote:
> On Sunday, 13 September 2020 at 22:29:00 UTC, Andrei 
> Alexandrescu wrote:
>> Solves a long-standing, difficult problem of outputting 
>> meaningful, useful error messages.
>
> It might be possible to do this with the DIP  but it will take 
> some repetition:
>
> void foo(T)() if(checkInputRange!T.passed, 
> checkInputRange!T.error) {}
>

Would be less nasty if 
https://issues.dlang.org/show_bug.cgi?id=21247 were fixed, then 
you could just do:

void foo(T)() if(checkInputRange!T) {}