Re: [boost] [fusion][parameter] a solution for named parameters/parameter packs using fusion maps

Stjepan Rajko:

function_taking_both( label("hello") & size(1) );

FWIW, I've been using this in a context where I needed "arbitrary" argument lists and it works. It has the advantage that the caller only needs to know about label and size, the eventual callee only needs to know about the arguments it recognizes and can ignore the rest, and the intermediate layers can pass everything downstream as-is without knowing about anything.