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Re: [v3 PATCH] Use constexpr addressof in optional, SFINAE housekeeping for any, optional and tuple.

From: Jonathan Wakely <jwakely at redhat dot com>
To: Ville Voutilainen <ville dot voutilainen at gmail dot com>
Cc: libstdc++ <libstdc++ at gcc dot gnu dot org>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Date: Sun, 13 Nov 2016 21:06:10 +0000
Subject: Re: [v3 PATCH] Use constexpr addressof in optional, SFINAE housekeeping for any, optional and tuple.
Authentication-results: sourceware.org; auth=none
References: <CAFk2RUbbpct6n1Jucq0m9Q7FdaeBD55AeupxBiHOSE8drnx3WQ@mail.gmail.com>

On 26/10/16 20:10 +0300, Ville Voutilainen wrote:

   Use constexpr addressof in optional, SFINAE housekeeping
   for any, optional and tuple.
   * include/std/any (__do_emplace(_Args&&...)): New.
   (__do_emplace(initializer_list<_Up>, _Args&&...)): Likewise.
   (__any_constructible): Likewise.
   (__any_constructible_t): Use __any_constructible.
   (operator=(_ValueType&&)): SFINAE in the return type.
   (emplace(_Args&&...)): Likewise.
   (emplace(initializer_list<_Up>, _Args&&...)): Likewise.
   * include/std/optional (_Has_addressof_mem): Remove.
   (_Has_addressof_free): Likewise.
   (_Has_addressof): Likewise.
   (__constexpr_addressof(_Tp&)): Likewise.
   (operator->): Use std::__addressof.
   * include/std/tuple (operator=(const tuple<_UElements...>&)):
   SFINAE in return type.
   (operator=(tuple<_UElements...>&&)): Likewise.
   * testsuite/20_util/any/misc/any_cast_neg.cc: Adjust.


OK for trunk, thanks.

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