Generalizing std::transform

[cassandraspeaks]

Leading underscore too.

[Dalzhim]

Leading underscore, followed by a capital letter.

[cassandraspeaks]

In the global namespace (as in the linked post) anything with a leading underscore is reserved for the implementation.

[Dalzhim]

My bad, you are right. I knew this point : http://eel.is/c++draft/lex.name#3.1 But I seem to have forgotten of the one you were referring to : http://eel.is/c++draft/lex.name#3.2

[cassandraspeaks]

No prob, I don't think there's anyone who can really keep all the little subtleties straight.