From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2181) id BDBE7385624F; Fri, 23 Jun 2023 16:13:13 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BDBE7385624F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1687536793; bh=6xDmmJ3hnMIitM+DzP4S9rTsNWrq12fLTz02KQqs8r0=; h=From:To:Subject:Date:From; b=U8EN4zOcKHSZex7AwLi0clz/Fgl/EkIdlMWFSKxKX5DjPvfPfrR5juniuNKjsrfBq IylaTQOPPzbyfj8WP2DalEfeDScG1AEr1xOYOIFOG+IfvolxpXnw5Lt6YMxX+n3U/L Koj6Ah+db79ZEbT8KdW+me0BSbLq4PJsZlb4XCRI= MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="utf-8" From: Jonathan Wakely To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r10-11470] libstdc++: Document removal of implicit allocator rebinding extensions X-Act-Checkin: gcc X-Git-Author: Jonathan Wakely X-Git-Refname: refs/heads/releases/gcc-10 X-Git-Oldrev: b272bc0fbf84454cae8c02e7404cfb23641380cd X-Git-Newrev: 291df257830e4ff877c716cfe6430c03677d9606 Message-Id: <20230623161313.BDBE7385624F@sourceware.org> Date: Fri, 23 Jun 2023 16:13:13 +0000 (GMT) List-Id: https://gcc.gnu.org/g:291df257830e4ff877c716cfe6430c03677d9606 commit r10-11470-g291df257830e4ff877c716cfe6430c03677d9606 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 359dcc4f213..8f0b17e858a 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> @@ -423,4 +428,8 @@ 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.

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\ No newline at end of file diff --git a/libstdc++-v3/doc/xml/manual/evolution.xml b/libstdc++-v3/doc/xml/manual/evolution.xml index 0394f7efb7b..f7bf8bb2b71 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. + +