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Section: 23.14.12 [func.memfn] Status: Dup Submitter: Alisdair Meredith Opened: 2009-10-09 Last modified: 2017-02-03
Priority: Not Prioritized
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Duplicate of: 920
Since we have removed the entry in B [implimits] for the library-specific limit for number of arguments passed to function/tuple/etc. I believe we need to update the spec for mem_fn to reflect this.
The "Remarks: Implementations may implement mem_fn as a set of overloaded function templates." no longer holds, as we cannot create an arbitrary number of such overloads. I believe we should strike the remark and add a second signature:
template<class R, class T, typename ... ArgTypes> unspecified mem_fn(R (T::*pm)(ArgTypes...));
I believe we need two signatures as pointer-to-data-member and pointer-to-member-function-taking-no-args appear to use subtly different syntax.
[ 920 as a similar proposed resolution. ]
Add to 23.14 [function.objects] and 23.14.12 [func.memfn]:
template<class R, class T> unspecified mem_fn(R T::* pm)
Strike 23.14.12 [func.memfn], p5:
Remarks: Implementations may implement mem_fn as a set of overloaded function templates.