EricWF added inline comments.
================ Comment at: include/__functional_base:396 + !is_same<__uncvref_t<_Up>, reference_wrapper>::value + >::type, bool _IsNothrow = noexcept(__bind(_VSTD::declval<_Up>()))> + _LIBCPP_INLINE_VISIBILITY reference_wrapper(_Up&& __u) _NOEXCEPT_(_IsNothrow) ---------------- tcanens wrote: > Is it safe to do this when we are using `_NOEXCEPT_` in the next line? It should be. The noexcept condition should only be evaluated *as needed* for functions selected by overload resolution. i.e. The noexcept condition is only considered on well-formed functions. And this function is only well-formed if `_IsNothrow` is well formed. If `IsNothrow` is ill-formed, it will prevent the functions noexcept specifier from ever being evaluated. https://reviews.llvm.org/D40259 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
