funchelpers: Support traits for non-member functions
authorManuel Nickschas <sputnick@quassel-irc.org>
Mon, 15 Oct 2018 20:18:24 +0000 (22:18 +0200)
committerManuel Nickschas <sputnick@quassel-irc.org>
Sun, 18 Nov 2018 10:06:43 +0000 (11:06 +0100)
Add a FuncHelper overload for non-member (free) functions. Rename
MemberFunction to FunctionTraits to reflect that enhancement.


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