ReturnType and Parameters of Templated function/method

[ketmar via Digitalmars-d-learn]

On Thursday, 13 October 2016 at 20:52:09 UTC, Patric Dexheimer 
wrote:
> So for now my idea is to brute force the numbers of arguments 
> with 'compiles' trait or trying to get the sourcecode somehow.

depending on source code form (even if you can get it) is highly 
error-prone. consider it UB.

also, i think that you'd better not guess, but ask the user to 
explicitly instantiate the methods with `alias` -- this way you 
have to write less hacky code, and the user will have more 
control over what is bound. you may provide helper mixin 
templates to instantiate n-ary functions with given set of types 
too. this is slightly more work on the user side, but it doesn't 
depend on hacks and undocumented things.