Proposed resolution:

This wording is relative to N4562.

1. Edit [func.wrap.func], class template function synopsis, as indicated:

   namespace std {
     namespace experimental {
     inline namespace fundamentals_v2 {
       […]
       template<class R, class... ArgTypes>
       class function<R(ArgTypes...)> {
       public:
         […]
         void swap(function&);
         template<class F, class A> void assign(F&&, const A&);
         […]
       };
       […]
     } // namespace fundamentals_v2
     } // namespace experimental
     […]
   } // namespace std
   

[ 2016-02, Issues Telecon ]

P0; move to Tentatively Ready.

Addresses: fund.ts.v2

Following the lead of LWG 2385, the assign(F&&, const A&) member function template in std::experimental::function makes no sense (it causes undefined behavior unless the allocator passed compares equal to the one already used by *this) and should be removed.