DIP 1006 - Preliminary Review Round 1

[12345swordy]

On Tuesday, 6 March 2018 at 18:49:42 UTC, Paolo Invernizzi wrote:
> I simply don't understand why enforce or a custom check can't 
> be used @safe code, if you want that behaviour.
>
> /Paolo

Easy:
the custom check itself could be wrong
the custom check itself is right, but the implementation is wrong 
even though it may passed your unit tests.