[boost] [Hana/Fit] about constexpr/noexcept on equivalent functions to std::overload

Subject: [boost] [Hana/Fit] about constexpr/noexcept on equivalent functions to std::overload
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2016-07-02 05:03:04

Hi,

On the C++ standard meating in Oulu, we decided to make the 
std::overload function constexpr and conditionaly noexcept and ensure 
that the overloaded functions shall be constexpr if the stored finctions 
are.

I don't find in the reference documentation of Hana and Fit any 
reference of whether the overloaded functions preserve constexpr or not.

There is a reedit post [1] and CWG issue 1581 [2] that are related.

Could the authors clarify?

What other think?

Best,

Vicente

[1] https://www.reddit.com/r/cpp/comments/35g7f6/c17_progress_update/cr4mvid

[2] http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#1581