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[SG10] Bump value of __cpp_lib_chrono for P0505R0?

From: Jonathan Wakely <cxx_at_[hidden]>
Date: Fri, 31 Mar 2017 12:18:40 +0100
The macro is currently set to 201510 following P0092R1. In Kona
P0505R0 added constexpr in a few more places, which are only very
minor changes. I don't think we need a new macro, so setting the value
to 201703 seems appropriate.

Hmm, although this assumes nobody would implement the latter feature
before the first. Both libstdc++ and libc++ have already implemented
the P0092R1 changes, and VC++ doesn't seem to define any feature-test
macros.

Received on 2017-03-31 13:19:02