Making preconditions better specified and faster

[Stefan Koch via Digitalmars-d]

On Sunday, 18 December 2016 at 09:32:53 UTC, Caspar Kielwein 
wrote:
> On Thursday, 15 December 2016 at 18:48:22 UTC, Andrei 
> Alexandrescu wrote:
>> https://issues.dlang.org/show_bug.cgi?id=16975
>
> I'd love if preconditions where available at the caller. This 
> would make it possible to use preconditions for input 
> scrubbing, even in release builds with disabled asserts.

That is exactly what they are not for.