Good news from the Visual C++ team: in Visual Studio Update 2, they have implemented every C++ Standard Library feature that's been voted into C++11, C++14, and the C++17-so-far Working Paper N4567:

VS 2015 Update 2's STL is C++17-so-far Feature Complete

by Stephan T. Lavavej

From the article:

Update 2's STL fully supports N3462 "SFINAE-Friendly result_of" and LWG 2132 "std::function ambiguity"...