Concepts like c++20 with specialized overload resolution.

[Dom DiSc]

On Saturday, 27 May 2023 at 19:16:18 UTC, vushu wrote:
> It depends. This example is quite small and a `static if` is 
> sufficient, if you have a lot of cases it would make sense to 
> split thing up into overloaded functions.

Even with a lot of cases you can simply call in each static if a 
(private) subfunction. I would always prefer this over overloads 
because it gets you a much cleaner API (I consider the constraint 
to be part of the function signature, which therefore can get 
very long and produces a lot of overloads that each only differ 
in the constraints). Also it becomes more and more obfuscated for 
which cases there is an overload and for which not.
A good (?!?) example of how bad this can get is the "to" template.