From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2181) id 8CDE03858CD1; Fri, 23 Jun 2023 12:59:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8CDE03858CD1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1687525184; bh=I6CDOyT5znPNeHPTGoQ4jfR8BGz14QtOEwz+3A54x5A=; h=From:To:Subject:Date:From; b=yavxh6DJ1nMIlh+AapmvQcYduk8WE+Fv5vjJmdjyJrb4epoParvTBD53BYd+TX18x FEJl6Bdb9zHOlkILsaaVbDUWrpQJoHVMkdPN9c/o+cs9C+k9jAav3FKzIgYDv94E65 BBVw7GEVSS3sjBW/NTv2dQgNitCGnotCvTzm3I3U= 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 r12-9724] libstdc++: Document removal of implicit allocator rebinding extensions X-Act-Checkin: gcc X-Git-Author: Jonathan Wakely X-Git-Refname: refs/heads/releases/gcc-12 X-Git-Oldrev: c409f2a1cc5d5bffe2fb93454924ae402c57f8f6 X-Git-Newrev: 72ceed08d45137b0f1a9b4ea8ca533aa6489bc39 Message-Id: <20230623125944.8CDE03858CD1@sourceware.org> Date: Fri, 23 Jun 2023 12:59:44 +0000 (GMT) List-Id: https://gcc.gnu.org/g:72ceed08d45137b0f1a9b4ea8ca533aa6489bc39 commit r12-9724-g72ceed08d45137b0f1a9b4ea8ca533aa6489bc39 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 604380e0136..fd6420a9e2c 100644 --- a/libstdc++-v3/doc/html/manual/api.html +++ b/libstdc++-v3/doc/html/manual/api.html @@ -370,6 +370,11 @@ Calling a std::bind result as volatile was deprecated 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> @@ -425,6 +430,10 @@ Calling a std::bind result as volatile was deprecated 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 82936189179..9259c43fb19 100644 --- a/libstdc++-v3/doc/xml/manual/evolution.xml +++ b/libstdc++-v3/doc/xml/manual/evolution.xml @@ -915,6 +915,13 @@ Calling a std::bind result as volatile was deprecated for C++17. 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> @@ -998,6 +1005,12 @@ Calling a std::bind result as volatile was deprecated for C++17. 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>