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GET /api/patches/2218072/?format=api
{ "id": 2218072, "url": "http://patchwork.ozlabs.org/api/patches/2218072/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/acumU6QsuNDECnX6@tucnak/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<acumU6QsuNDECnX6@tucnak>", "list_archive_url": null, "date": "2026-03-31T10:47:47", "name": "testsuite: Add testcase for LWG4556 - Unclear properties of reflection strings", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9b79b7c8b44391c4383ac7e0af57500a8762d411", "submitter": { "id": 671, "url": "http://patchwork.ozlabs.org/api/people/671/?format=api", "name": "Jakub Jelinek", "email": "jakub@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/acumU6QsuNDECnX6@tucnak/mbox/", "series": [ { "id": 498173, "url": "http://patchwork.ozlabs.org/api/series/498173/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=498173", "date": "2026-03-31T10:47:47", "name": "testsuite: Add testcase for LWG4556 - Unclear properties of reflection strings", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498173/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218072/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218072/checks/", "tags": {}, "related": [], "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\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=dHtwVpQ9;\n\tdkim-atps=neutral", "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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Tue, 31 Mar 2026 10:47:51 +0000 (UTC)", "from tucnak.zalov.cz (unknown [10.44.32.9])\n by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with\n ESMTPS\n id 58B101800107; Tue, 31 Mar 2026 10:47:50 +0000 (UTC)", "from tucnak.zalov.cz (localhost [127.0.0.1])\n by tucnak.zalov.cz (8.18.1/8.18.1) with ESMTPS id 62VAll0c4125491\n (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT);\n Tue, 31 Mar 2026 12:47:47 +0200", "(from jakub@localhost)\n by tucnak.zalov.cz (8.18.1/8.18.1/Submit) id 62VAllje4125490;\n Tue, 31 Mar 2026 12:47:47 +0200" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org 6EF704B7A1E7", "OpenDKIM Filter v2.11.0 sourceware.org 98FDB4BA23EA" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org 98FDB4BA23EA", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org 98FDB4BA23EA", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1774954074; cv=none;\n b=Fc3wanykY8v8O8QBilERs4LQSwTBG0yJHw7efGAKNYrBRTSQMRaOM9WMMRbyMLCMSzRytZbRfWhJc4QdU71hKu+kk4SrY9xZnb3x6Yj/ffHGAaWL5sCQclB51elCzuCDDh6NHbsD690W9cdCRGzy8qrl71n15nax+VCsRyaGpIE=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1774954074; c=relaxed/simple;\n bh=HuKeeKWWD/bDfeu4Rj+axCXOFpj18G4e8ZF3dlm7Sq0=;\n h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version;\n b=oEnYfrTSMOj46mVyDcvgKWk+IRWt+dvU1X5dx52HafC6A1M5bwU5iG9cw7+Jd2oS1hRhclDXbl3gO7pHZ/gvuDG9SXKOW0c5oawchO9zp+lvVom9l6DJ/AGDYL0JGGPjC5UHoI25QaNuzYKwYPUvyV14uB5qyFor+m5ygRBfdYs=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1774954074;\n h=from:from:reply-to:reply-to:subject:subject:date:date:\n message-id:message-id:to:to:cc:cc:mime-version:mime-version:\n content-type:content-type; bh=lp8BTmm3ZzUGUCKQfPmVsMwT3PJIvx2pUWQq1Gln4DM=;\n b=dHtwVpQ9HjxTeKE5cTiRq0SDomCLkkYGPZKFLzPVdbPE7Vs7wmGGwBxWBFsvNUUlyBip3c\n T5y1Ew515X2VYucUetT9FXQXtv9wVa40N/3lrjBlJ/IY8GnyVCYFH6R6SMbrwpO85T7moM\n QUebHZE0TL+OterEZytJH7hbQ+I1ZQk=", "X-MC-Unique": "lXhUQVKFPxe1xfoAMhqpUg-1", "X-Mimecast-MFC-AGG-ID": "lXhUQVKFPxe1xfoAMhqpUg_1774954072", "Date": "Tue, 31 Mar 2026 12:47:47 +0200", "From": "Jakub Jelinek <jakub@redhat.com>", "To": "Jason Merrill <jason@redhat.com>, Marek Polacek <polacek@redhat.com>,\n Jonathan Wakely <jwakely@redhat.com>", "Cc": "gcc-patches@gcc.gnu.org", "Subject": "[PATCH] testsuite: Add testcase for LWG4556 - Unclear properties of\n reflection strings", "Message-ID": "<acumU6QsuNDECnX6@tucnak>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.93", "X-Mimecast-Spam-Score": "0", "X-Mimecast-MFC-PROC-ID": "yBzQfh8TZpgyGMV_hbC9WZ-4ns_0_CSGZ6bKQEyTrHg_1774954072", "X-Mimecast-Originator": "redhat.com", "Content-Type": "text/plain; charset=us-ascii", "Content-Disposition": "inline", "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>", "Reply-To": "Jakub Jelinek <jakub@redhat.com>", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "Hi!\n\nThe issue clarifies what the *string_view points to is not valid for\ntemplate arguments with pointer type, the following testcase verifies\nthat we already reject it.\n\nTested on x86_64-linux, ok for trunk?\n\n2026-03-31 Jakub Jelinek <jakub@redhat.com>\n\n\t* g++.dg/reflect/lwg4556.C: New test.\n\n\n\tJakub", "diff": "--- gcc/testsuite/g++.dg/reflect/lwg4556.C.jj\t2026-03-31 12:36:35.928440859 +0200\n+++ gcc/testsuite/g++.dg/reflect/lwg4556.C\t2026-03-31 12:45:20.539536699 +0200\n@@ -0,0 +1,40 @@\n+// LWG4556 - Unclear properties of reflection strings\n+// { dg-do compile { target c++26 } }\n+// { dg-additional-options \"-freflection\" }\n+\n+#include <meta>\n+\n+template <const char *P>\n+void foo () {}\n+\n+template <const char8_t *P>\n+void bar () {}\n+\n+void\n+baz ()\n+{\n+ foo <symbol_of (std::meta::op_plus_equals).data ()> ();\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"\\\\\\+=\\\\\\\"\\\\\\[0\\\\\\]' is not a valid template argument of type 'const char\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ bar <u8symbol_of (std::meta::op_pipe).data ()> ();\t\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"\\\\\\|\\\\\\\"\\\\\\[0\\\\\\]' is not a valid template argument of type 'const char8_t\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ foo <symbol_of (std::meta::op_plus_equals).data () + 1> ();\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"\\\\\\+=\\\\\\\"\\\\\\[1\\\\\\]' is not a valid template argument of type 'const char\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ bar <u8symbol_of (std::meta::op_pipe).data () + 1> ();\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"\\\\\\|\\\\\\\"\\\\\\[1\\\\\\]' is not a valid template argument of type 'const char8_t\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ foo <identifier_of (^^baz).data ()> ();\t\t\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"baz\\\\\\\"\\\\\\[0\\\\\\]' is not a valid template argument of type 'const char\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ bar <u8identifier_of (^^baz).data ()> ();\t\t\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"baz\\\\\\\"\\\\\\[0\\\\\\]' is not a valid template argument of type 'const char8_t\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ foo <identifier_of (^^baz).data () + 1> ();\t\t\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"baz\\\\\\\"\\\\\\[1\\\\\\]' is not a valid template argument of type 'const char\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ bar <u8identifier_of (^^baz).data () + 1> ();\t\t\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"baz\\\\\\\"\\\\\\[1\\\\\\]' is not a valid template argument of type 'const char8_t\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ foo <display_string_of (^^baz).data ()> ();\t\t\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"void baz\\\\\\(\\\\\\)\\\\\\\"\\\\\\[0\\\\\\]' is not a valid template argument of type 'const char\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ bar <u8display_string_of (^^baz).data ()> ();\t\t\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"void baz\\\\\\(\\\\\\)\\\\\\\"\\\\\\[0\\\\\\]' is not a valid template argument of type 'const char8_t\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ foo <display_string_of (^^baz).data () + 1> ();\t\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"void baz\\\\\\(\\\\\\)\\\\\\\"\\\\\\[1\\\\\\]' is not a valid template argument of type 'const char\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+ bar <u8display_string_of (^^baz).data () + 1> ();\t\t// { dg-error \"no matching function for call to\" }\n+ // { dg-error \"'\\\\\\&\\\\\\\"void baz\\\\\\(\\\\\\)\\\\\\\"\\\\\\[1\\\\\\]' is not a valid template argument of type 'const char8_t\\\\\\*'\" \"\" { target *-*-* } .-1 }\n+}\n", "prefixes": [] }