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GET /api/1.1/patches/2228656/?format=api
{ "id": 2228656, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2228656/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/ae8NG1FTPg1QV34A@tucnak/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/1.1/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 }, "msgid": "<ae8NG1FTPg1QV34A@tucnak>", "date": "2026-04-27T07:15:40", "name": "libstdc++: Fix up std::is_scalar for std::meta::info [PR125024]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "a8509df85dba142b2af83eef3875bd8154bb2b06", "submitter": { "id": 671, "url": "http://patchwork.ozlabs.org/api/1.1/people/671/?format=api", "name": "Jakub Jelinek", "email": "jakub@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/ae8NG1FTPg1QV34A@tucnak/mbox/", "series": [ { "id": 501597, "url": "http://patchwork.ozlabs.org/api/1.1/series/501597/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=501597", "date": "2026-04-27T07:15:40", "name": "libstdc++: Fix up std::is_scalar for std::meta::info [PR125024]", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501597/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2228656/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2228656/checks/", "tags": {}, "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=ImLZyaHT;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=temperror (SPF Temporary Error: DNS Timeout) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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Mon, 27 Apr 2026 08:05:42 +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 63R85d7D1373337\n (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT);\n Mon, 27 Apr 2026 10:05:39 +0200", "(from jakub@localhost)\n by tucnak.zalov.cz (8.18.1/8.18.1/Submit) id 63R85d7K1373336;\n Mon, 27 Apr 2026 10:05:39 +0200" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org 52AC54BAE7E7", "OpenDKIM Filter v2.11.0 sourceware.org 4B0084BAD142" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org 4B0084BAD142", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org 4B0084BAD142", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1777277146; cv=none;\n b=l4PQ7RyiKrp+jM7zBGWpsx7G7bx6Rir0f1jkExGzBvBIvDtocpE6K3YpXTWVdaeV7kr5DzrNlGFvxAiaXlE0iGq+pfB0dFjRdtGD7Vttv3PB//V36zPLp4BHejad35bQIrOJ+fW7Xb7EIm7aKReuShjDlJHP0I9BUgMScG8Byf0=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1777277146; c=relaxed/simple;\n bh=HMlRif0hO8Klp+ARBNesyQcdAL0fyWPcTPZp/ejfc84=;\n h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version;\n b=kY3qzjE1XdsS0AYZaikqN1jf9X9q4PIj2C+vbug/0BFYkhYkvkjH7i6a8YOKkCk2V2pxEv6znvkOrN5VLJ7SFPkzgpkDWqrOHy43+bWdXlCUSeg63kuTVisz0H+rubHwSaoA96hcXXZdwmPqG0r8UamEmhgR/N+Vb5qSeCGKH5c=", "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=1777277145;\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:resent-to:resent-from:resent-message-id;\n bh=/fAfhjAeAu3IrNKxY1V59BlytRe+5DbItx58dGpUlZM=;\n b=ImLZyaHT5vhEOqye35LsbUFa79UHe1lcLzkyJtQAP9FuT6Jv5geeZbVruke9cwlRt0yjVS\n +Xiom69gklrZg1JKYgHkMSwvCCy5/PIf4Oz4QdLb3e2Rc0PWauZhK75PverPdLgj0tG0oV\n dFSXy7q7eTjzZx5m5rBK3ROudcLuuZE=", "X-MC-Unique": "OLEt-RMtPE2Y4cXzk976sA-1", "X-Mimecast-MFC-AGG-ID": "OLEt-RMtPE2Y4cXzk976sA_1777277143", "Resent-From": "Jakub Jelinek <jakub@redhat.com>", "Resent-Date": "Mon, 27 Apr 2026 10:05:39 +0200", "Resent-Message-ID": "<ae8Y03n65E6Ck6cU@tucnak>", "Resent-To": "Jonathan Wakely <jwakely@redhat.com>, gcc-patches@gcc.gnu.org,\n libstdc++@gcc.gnu.org", "Date": "Mon, 27 Apr 2026 09:15:40 +0200", "From": "Jakub Jelinek <jakub@redhat.com>", "To": "Jonathan Wakely <jwakely@redhat.com>", "Cc": "gcc-patches@gcc.gnu.org, libstdc++@gcc.gnu.org", "Subject": "[PATCH] libstdc++: Fix up std::is_scalar for std::meta::info\n [PR125024]", "Message-ID": "<ae8NG1FTPg1QV34A@tucnak>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.111", "X-Mimecast-Spam-Score": "0", "X-Mimecast-MFC-PROC-ID": "PBSIfL1_r9D0dAU4TmNkrmubAYYhsnJZ1l7wlp_Vw2c_1777277143", "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\nhttps://eel.is/c++draft/basic.types.general#9.sentence-1 says that\nstd::meta::info and its cv-qualified versions are scalar types too\n(and in https://eel.is/c++draft/basic.fundamental#19.sentence-1\nthat they are fundamental types too).\nNow, on the reflection side, eval_is_scalar_type is handled\nin the compiler and uses SCALAR_TYPE_P (type) which includes\nREFLECTION_TYPE_P check and eval_is_fundamental_type includes that\nexplicitly too.\nstd::is_fundamental uses\n template<typename _Tp>\n struct is_fundamental\n : public __or_<is_arithmetic<_Tp>, is_void<_Tp>,\n is_null_pointer<_Tp>\n #if __cpp_impl_reflection >= 202506L\n , is_reflection<_Tp>\n #endif\n >::type\n { };\nbut for std::is_scalar we apparently forgot to include is_reflection.\n\nThe following patch fixes that.\n\nBootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk/16.2?\n\n2026-04-26 Jakub Jelinek <jakub@redhat.com>\n\n\tPR libstdc++/125024\n\t* include/std/type_traits (std::is_scalar): For\n\t__cpp_impl_reflection >= 202506L handle is_reflection types as\n\tscalar.\n\t* testsuite/20_util/is_scalar/reflection.cc: New test.\n\n\n\tJakub", "diff": "--- libstdc++-v3/include/std/type_traits.jj\t2026-04-09 18:09:11.002020134 +0200\n+++ libstdc++-v3/include/std/type_traits\t2026-04-26 19:20:37.109205308 +0200\n@@ -871,7 +871,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n template<typename _Tp>\n struct is_scalar\n : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>,\n- is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type\n+ is_member_pointer<_Tp>, is_null_pointer<_Tp>\n+#if __cpp_impl_reflection >= 202506L\n+\t\t , is_reflection<_Tp>\n+#endif\n+\t\t >::type\n { };\n \n /// is_compound\n--- libstdc++-v3/testsuite/20_util/is_scalar/reflection.cc.jj\t2026-04-26 20:30:15.661943601 +0200\n+++ libstdc++-v3/testsuite/20_util/is_scalar/reflection.cc\t2026-04-26 20:49:40.107965736 +0200\n@@ -0,0 +1,13 @@\n+// { dg-do compile { target c++26 } }\n+// { dg-additional-options \"-freflection\" }\n+\n+#include <type_traits>\n+#include <testsuite_tr1.h>\n+\n+void test01()\n+{\n+ using std::is_scalar;\n+ using namespace __gnu_test;\n+\n+ static_assert(test_category<is_scalar, decltype (^^::)>(true), \"\");\n+}\n", "prefixes": [] }