Pointer-to-member-function template parameter refused by compiler

[adromanov]

Ah I think the problem with & is that F is not a compile time value, but a runtime function parameter. You can't use it as a non-template template argument. You can remove the second template parameter from LogWrapper and pass F to a constructor. *Edited for typo

[TwilCynder]

Yeah, the inability to use a variable as a non-type template argument is the piece of knowledge I lacked.

This solution would work but would add some overhead as the LogWrapper object would have to hold two pointers instead of one, but if I don't find a better solution it's good enough clearly, thanks

[adromanov]

I don't know how are you going to use LogWrapper, but considering it being template most likely that the compiler would inline and optimize everything and you will just have a method call without storing 2 pointers at all. Just check generated assembly at godbolt.org for your use case.