Using map result type

[Dominikus Dittes Scherkl]

On Tuesday, 10 December 2019 at 07:23:56 UTC, AA wrote:

> Would the second solution of declaring a template constraint 
> like that be considering strange/out of place in D? e.g. do 
> people normally try and declare the template constraints on a 
> function or just rely on compile time failure from to 
> instantiate template.

No, you can do "normal" OOP as you like. But you will encounter 
the constraint approach often in phobos and other libraries, as 
is provides some advantages.