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GET /api/1.1/patches/2228656/?format=api
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{
    "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"
    },
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            "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/",
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        "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>",
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        "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": []
}