<p>I agree with <a href="https://github.com/stereomatchingkiss" class="user-mention">@stereomatchingkiss</a>, we should hold off on C++14 support for a few years (probably) because of lacking compiler support and stability.  The decltype solution is maybe a bit ugly though.  Maybe there is a better option?  (I'm not sure, I haven't thought about it much.)</p>

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