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Re: C++ PATCH for c++/70167, array prvalue treated as lvalue

From: Jason Merrill <jason at redhat dot com>
To: gcc-patches List <gcc-patches at gcc dot gnu dot org>
Cc: "libstdc++" <libstdc++ at gcc dot gnu dot org>
Date: Tue, 9 May 2017 11:10:59 -0400
Subject: Re: C++ PATCH for c++/70167, array prvalue treated as lvalue
Authentication-results: sourceware.org; auth=none
References: <CADzB+2=t-FokvFXDaAjhtqFVDmN3xN58VJP2beW+Ca1WHNW9YQ@mail.gmail.com>

On Tue, May 9, 2017 at 9:46 AM, Jason Merrill <jason@redhat.com> wrote:
> The issue here was that we've been trying to treat C++
> list-initialized temporaries (which are rvalues) the same as C99
> compound literals (which are lvalues).  This patch distinguishes
> between them so we can treat them each correctly.

This introduced a failure in the libstdc++ testsuite, which was
incorrectly relying on the temporary array backing a
std::initializer_list being static even if the std::initializer_list
is not; in fact they should have the same storage duration.  Fixing
thus.

Attachment: 70167-libtest.diff
Description: Text document

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