From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 6B8A4385841F; Fri,  9 Feb 2024 14:02:33 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 6B8A4385841F
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1707487353;
	bh=kq5ohbZ6Y5VvUVAn46rJFqhyKJv3VHoJlh2cew5sWq4=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=L8rpFEbCERAZBjSq5yoAiKpQuksZm7mDJ5f9FWEAxSenMX0Wdge+/CzPHYaGXKnHm
	 D12cB8uY0e/wmWEoe9S3JP+JIwM3lAmHHYSaTWBp4GyHkeAj1F9+7lbcCJ+bsy58R6
	 xzg0oeoY6NP1bMUFZ3C2MAjWAl1Kz0urWn2P+Yhw=
From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/113841] Can't swap two std::hash<T*>
Date: Fri, 09 Feb 2024 14:02:33 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 12.1.0
X-Bugzilla-Keywords: rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: redi at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: component
Message-ID: <bug-113841-4-xrxtcumHSM@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-113841-4@http.gcc.gnu.org/bugzilla/>
References: <bug-113841-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113841

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |libstdc++

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Actually, maybe we need this change in the library, so that it works in GCC=
 12
and also works with Clang:

--- a/libstdc++-v3/include/bits/stl_vector.h
+++ b/libstdc++-v3/include/bits/stl_vector.h
@@ -135,6 +135,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
        _GLIBCXX20_CONSTEXPR
        _Vector_impl() _GLIBCXX_NOEXCEPT_IF(
            is_nothrow_default_constructible<_Tp_alloc_type>::value)
+#if __cpp_lib_concepts
+       requires is_default_constructible_v<_Tp_alloc_type>
+#endif
        : _Tp_alloc_type()
        { }=