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[PATCH] PR 79798 Fix incorrect use of std::result_of in std::bind

From: Jonathan Wakely <jwakely dot gcc at gmail dot com>
To: "libstdc++" <libstdc++ at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 2 Mar 2017 05:17:18 +0000
Subject: [PATCH] PR 79798 Fix incorrect use of std::result_of in std::bind
Authentication-results: sourceware.org; auth=none

Another case of problems caused by incorrect use of result_of. Because
functions can't have top-level const on parameters result_of<F(const
T)> is result_of<F(T)> so doesn't give you the answer for the question
you meant to ask.

        PR libstdc++/79798
        * include/std/functional (bind::_Res_type_impl): Fix incorrect use of
        result_of that loses top-level cv-qualifiers.
        * testsuite/20_util/bind/79798.cc: New test.


Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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