From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2181) id B8BEB3858CD1; Fri, 23 Jun 2023 13:00:17 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B8BEB3858CD1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1687525217; bh=jZkCFE2U0dtHjQwf8+fvRYTX9cMxXHTUf/o4Ks4qZAk=; h=From:To:Subject:Date:From; b=fSF0XTkEflvDPmd7gQqqn25OR0klJbU9EoTUl42wtcqWnsaGdCAut3CN/4O3LScg7 HdqIJzKZPCdU1cEeCIJK+v/PiVJidIHctVGDfai1wZ2hPkBC+xA4tW/4UD2Rnp3uk8 oIzpWt2swjk9B05TuPK/3KW3RotgApHrombGS9z8= MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Jonathan Wakely To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r11-10871] libstdc++: Document removal of implicit allocator rebinding extensions X-Act-Checkin: gcc X-Git-Author: Jonathan Wakely X-Git-Refname: refs/heads/releases/gcc-11 X-Git-Oldrev: 5fc6b3a03355e1f77a7c38c0fa7afb0822ad954f X-Git-Newrev: c0bc9846d9e38bbeeef6723b3c44d5977e95b827 Message-Id: <20230623130017.B8BEB3858CD1@sourceware.org> Date: Fri, 23 Jun 2023 13:00:17 +0000 (GMT) List-Id: https://gcc.gnu.org/g:c0bc9846d9e38bbeeef6723b3c44d5977e95b827 commit r11-10871-gc0bc9846d9e38bbeeef6723b3c44d5977e95b827 Author: Jonathan Wakely Date: Mon May 15 21:41:56 2023 +0100 libstdc++: Document removal of implicit allocator rebinding extensions Traditionally libstdc++ allowed containers to be instantiated with allocator's that have the wrong value type, implicitly rebinding the allocator to the container's value type. Since C++20 that has been explicitly ill-formed, so the extension is no longer supported in strict modes (e.g. -std=c++17) and in C++20 and later. libstdc++-v3/ChangeLog: * doc/xml/manual/evolution.xml: Document removal of implicit allocator rebinding extensions in strict mode and for C++20. * doc/html/*: Regenerate. (cherry picked from commit 8cbaf679a3c1875c5475bd1cb0fb86fb9d03b2d4) Diff: --- libstdc++-v3/doc/html/manual/api.html | 9 +++++++++ libstdc++-v3/doc/xml/manual/evolution.xml | 13 +++++++++++++ 2 files changed, 22 insertions(+) diff --git a/libstdc++-v3/doc/html/manual/api.html b/libstdc++-v3/doc/html/manual/api.html index 70889a583f9..617c457e155 100644 --- a/libstdc++-v3/doc/html/manual/api.html +++ b/libstdc++-v3/doc/html/manual/api.html @@ -368,6 +368,11 @@ now defaults to zero. For the non-default --enable-symvers=gnu-versioned-namespace configuration, the shared library SONAME has been changed to libstdc++.so.8. +

+ The extension allowing containers to be instantiated with an allocator + that doesn't match the container's value type is no longer allowed in + strict (-std=c++NN) modes, only in + -std=gnu++NN modes.

9

C++17 header <memory_resource> @@ -423,6 +428,10 @@ now defaults to zero. and <stop_token> added. +

+ The extension allowing containers to be instantiated with an allocator + that doesn't match the container's value type is no longer allowed in + C++20 mode, even in non-strict -std=gnu++20 mode.

11

The --enable-cheaders=c_std configuration was deprecated. diff --git a/libstdc++-v3/doc/xml/manual/evolution.xml b/libstdc++-v3/doc/xml/manual/evolution.xml index 55b8903baff..6ae6b5aec19 100644 --- a/libstdc++-v3/doc/xml/manual/evolution.xml +++ b/libstdc++-v3/doc/xml/manual/evolution.xml @@ -911,6 +911,13 @@ now defaults to zero. libstdc++.so.8. + + The extension allowing containers to be instantiated with an allocator + that doesn't match the container's value type is no longer allowed in + strict () modes, only in + modes. + +

<constant>9</constant> @@ -994,6 +1001,12 @@ now defaults to zero. added. + + The extension allowing containers to be instantiated with an allocator + that doesn't match the container's value type is no longer allowed in + C++20 mode, even in non-strict mode. + +
<constant>11</constant>