[{"id":3680752,"web_url":"http://patchwork.ozlabs.org/comment/3680752/","msgid":"<bmm.hhunwv0hau.gcc.gcc-TEST.redi.40.1.SUMMARY@forge-stage.sourceware.org>","list_archive_url":null,"date":"2026-04-22T18:05:09","subject":"[SUMMARY] Re: [PATCH v1 0/1] libstdc++: Add poison pill for\n chrono::from_stream","submitter":{"id":93210,"url":"http://patchwork.ozlabs.org/api/people/93210/","name":"Jonathan Wakely via Sourceware Forge","email":"forge-bot+redi@forge-stage.sourceware.org"},"content":"This is a summary of discussions relative to the merge request created by Jonathan Wakely (redi) <redi@gcc.gnu.org> titled\nlibstdc++: Add poison pill for chrono::from_stream\nsince its creation.\n\nDescription: [LWG 3956](https://wg21.link/lwg3956) (approved in Hagenberg, February 2025) decided that `from_stream`\nshould be found *only* by ADL, not ordinary unqualified lookup. Add a\npoison pill overload to `chrono::__detail` where the `__parsable` concept and\n`operator>>(basic_istream&, _Parser)` are defined. This ensures that when\nthey use `from_stream` unqualified ordinary lookup finds the poison pill,\nwhich is deleted, so a usable overload resolution result can only be\nfound by ADL.\n\nWe already have the `std/time/parse/parse.cc` test checking that ADL\nworks, so this doesn't add a new test.\n\n```\nlibstdc++-v3/ChangeLog:\n\n\t* include/bits/chrono_io.h (chrono::__detail::from_stream): Add\n\tdeleted function as poison pill for unqualified lookup.\n```\n\nThe full and up to date discussion can be found at https://forge.sourceware.org/gcc/gcc-TEST/pulls/40\n\nThe merge request has been closed without being merged directly on the forge repository.\n\n\nOn 2025-03-07 16:32:16+00:00, (ppalka) wrote:\n\nLGTM\n\n\nOn 2025-03-07 20:56:20+00:00, Jonathan Wakely (redi) wrote:\n\nPushed as 4b180459626df64dac758da8760d868c2604ddf2\n\n\nOn 2026-04-22 18:03:44+00:00, Lichenor Forgejo Bot (forge-bot) wrote:\n\n<!-- pr-new-version -->\nVersion 1 of this pull request has been stored. It includes the following commits:\n- libstdc++: Add poison pill for chrono::from_stream - 5b8e44a0eff642731e54648f4ba3ff6afec9b0c1\n\n\n\nOn 2026-04-22 18:04:43+00:00, Lichenor Forgejo Bot (forge-bot) wrote:\n\nSent patch series version 1 containing 1 patches to gcc-patches mailing list <gcc-patches@gcc.gnu.org>.\n[Cover letter](https://inbox.sourceware.org/gcc-patches/bmm.hhunv1vldi.gcc.gcc-TEST.redi.40.1.0@forge-stage.sourceware.org)","headers":{"Return-Path":"<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)","sourceware.org; dmarc=none (p=none dis=none)\n header.from=forge-stage.sourceware.org","sourceware.org;\n spf=pass smtp.mailfrom=forge-stage.sourceware.org","server2.sourceware.org;\n arc=none smtp.remote-ip=38.145.34.39"],"Received":["from vm01.sourceware.org (vm01.sourceware.org [38.145.34.32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g16f770M7z1y2d\n\tfor <incoming@patchwork.ozlabs.org>; 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charset=\"utf-8\"","Content-Transfer-Encoding":"quoted-printable","MIME-Version":"1.0","Date":"Wed, 22 Apr 2026 18:05:09 +0000 (UTC)","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list <gcc-patches.gcc.gnu.org>","List-Unsubscribe":"<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>","List-Archive":"<https://gcc.gnu.org/pipermail/gcc-patches/>","List-Post":"<mailto:gcc-patches@gcc.gnu.org>","List-Help":"<mailto:gcc-patches-request@gcc.gnu.org?subject=help>","List-Subscribe":"<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"}},{"id":3680754,"web_url":"http://patchwork.ozlabs.org/comment/3680754/","msgid":"<bmm.hhunvfzbi8.gcc.gcc-TEST.forge-bot.40.5605.CMT@forge-stage.sourceware.org>","list_archive_url":null,"date":"2026-04-22T18:03:44","subject":"Re: [PATCH v1 0/1] libstdc++: Add poison pill for chrono::from_stream","submitter":{"id":93212,"url":"http://patchwork.ozlabs.org/api/people/93212/","name":"Lichenor Forgejo Bot via Sourceware Forge","email":"forge-bot+forge-bot@forge-stage.sourceware.org"},"content":"<!-- pr-new-version -->\nVersion 1 of this pull request has been stored. It includes the following commits:\n- libstdc++: Add poison pill for chrono::from_stream - 5b8e44a0eff642731e54648f4ba3ff6afec9b0c1\n\n\n--\nhttps://forge.sourceware.org/gcc/gcc-TEST/pulls/40#issuecomment-5605","headers":{"Return-Path":"<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)","sourceware.org; dmarc=none (p=none dis=none)\n header.from=forge-stage.sourceware.org","sourceware.org;\n spf=pass smtp.mailfrom=forge-stage.sourceware.org","server2.sourceware.org;\n arc=none smtp.remote-ip=38.145.34.39"],"Received":["from vm01.sourceware.org (vm01.sourceware.org\n [IPv6:2620:52:6:3111::32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g16fW4qHJz1y2d\n\tfor <incoming@patchwork.ozlabs.org>; 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charset=\"utf-8\"","Content-Transfer-Encoding":"quoted-printable","MIME-Version":"1.0","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list <gcc-patches.gcc.gnu.org>","List-Unsubscribe":"<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>","List-Archive":"<https://gcc.gnu.org/pipermail/gcc-patches/>","List-Post":"<mailto:gcc-patches@gcc.gnu.org>","List-Help":"<mailto:gcc-patches-request@gcc.gnu.org?subject=help>","List-Subscribe":"<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"}},{"id":3680760,"web_url":"http://patchwork.ozlabs.org/comment/3680760/","msgid":"<bmm.h59g3l9bls.gcc.gcc-TEST.ppalka.40.728.CMT@forge-stage.sourceware.org>","list_archive_url":null,"date":"2025-03-07T16:32:16","subject":"Re: [PATCH v1 0/1] libstdc++: Add poison pill for chrono::from_stream","submitter":{"id":93215,"url":"http://patchwork.ozlabs.org/api/people/93215/","name":"ppalka via Sourceware Forge","email":"forge-bot+ppalka@forge-stage.sourceware.org"},"content":"LGTM\n\n--\nhttps://forge.sourceware.org/gcc/gcc-TEST/pulls/40#issuecomment-728","headers":{"Return-Path":"<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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