[{"id":3680457,"web_url":"http://patchwork.ozlabs.org/comment/3680457/","msgid":"","list_archive_url":null,"date":"2026-04-22T10:34:33","subject":"Re: [PATCH] c++,\n libstc++: Bump __cpp_impl_reflection and __cpp_lib_reflection","submitter":{"id":90409,"url":"http://patchwork.ozlabs.org/api/people/90409/","name":"Tomasz Kamiński","email":"tkaminsk@redhat.com"},"content":"On Wed, Apr 22, 2026 at 12:32 PM Jakub Jelinek wrote:\n\n> Hi!\n>\n> Both __cpp_impl_reflection and __cpp_lib_reflection were increased from\n> 202506L to 202603L post Croydon, I assume to show that P3795R2 (maybe some\n> issues too) have been implemented.\n> Now, we do implement P3795R2 except for the is_applicable_type,\n> is_nothrow_applicable_type and apply_result metafunctions, but Jonathan\n> says\n> there is agreement in LWG that to test for availability of those one should\n> test __cpp_lib_reflection >= 202603L && __cpp_lib_apply >= 202603L.\n>\nI think testing only __cpp_lib_apply >= 202603L should be sufficient, i.e.\nthe\nvalue should be set only if reflection is supported.\n\n>\n> So, this patch bumps both FTMs.\n>\n> Tested on x86_64-linux, ok for trunk?\n>\n> 2026-04-22 Jakub Jelinek \n>\n> gcc/c-family/\n> * c-cppbuiltin.cc (c_cpp_builtins): Bump __cpp_impl_reflection\n> value\n> from 202506L to 202603L.\n> gcc/testsuite/\n> * g++.dg/DRs/dr2581-2.C: Adjust for __cpp_impl_reflection bump from\n> 202506L to 202603L.\n> * g++.dg/reflect/feat1.C: Likewise. Also adjust for\n> __cpp_lib_reflection bump from 202506L to 202603L.\n> * g++.dg/reflect/feat2.C: Likewise.\n> * g++.dg/reflect/feat3.C: Likewise.\n> libstdc++-v3/\n> * include/bits/version.def (reflection): Bump 202506L to 202603L\n> for both v and in extra_cond.\n> * include/bits/version.h: Regenerate.\n> * include/std/meta: Compare __glibcxx_reflection against\n> 202603L rather than 202506L.\n> * include/std/type_traits: Compare __cpp_impl_reflection against\n> 202603L rather than 202506L.\n> * src/c++23/std.cc.in: Likewise. Compare __glibcxx_reflection\n> against\n> 202603L rather than 202506L.\n> * testsuite/20_util/is_structural/value.cc: Compare\n> __cpp_impl_reflection against 202603L rather than 202506L.\n> * testsuite/20_util/variable_templates_for_traits.cc: Likewise.\n>\n> --- gcc/c-family/c-cppbuiltin.cc.jj 2026-03-27 10:17:13.713337609 +0100\n> +++ gcc/c-family/c-cppbuiltin.cc 2026-04-22 11:59:44.926135527 +0200\n> @@ -1119,7 +1119,7 @@ c_cpp_builtins (cpp_reader *pfile)\n> cpp_define (pfile,\n> \"__cpp_constexpr_virtual_inheritance=202506L\");\n> cpp_define (pfile, \"__cpp_expansion_statements=202506L\");\n> if (flag_reflection)\n> - cpp_define (pfile, \"__cpp_impl_reflection=202506L\");\n> + cpp_define (pfile, \"__cpp_impl_reflection=202603L\");\n> else\n> cpp_warn (pfile, \"__cpp_impl_reflection\");\n> }\n> --- gcc/testsuite/g++.dg/DRs/dr2581-2.C.jj 2026-03-27\n> 10:17:15.320311386 +0100\n> +++ gcc/testsuite/g++.dg/DRs/dr2581-2.C 2026-04-22 12:02:27.265362686 +0200\n> @@ -64,7 +64,7 @@\n> #define __cpp_impl_coroutine 201902L // { dg-error\n> \"'__cpp_impl_coroutine' redefined\" \"\" { target c++20 } }\n> #define __cpp_impl_destroying_delete 201806L // { dg-error\n> \"'__cpp_impl_destroying_delete' redefined\" \"\" { target c++20 } }\n> #define __cpp_impl_three_way_comparison 201907L // { dg-error\n> \"'__cpp_impl_three_way_comparison' redefined\" \"\" { target c++20 } }\n> -#define __cpp_impl_reflection 202506L // { dg-error\n> \"'__cpp_impl_reflection' redefined\" \"\" { target c++26 } }\n> +#define __cpp_impl_reflection 202603L // { dg-error\n> \"'__cpp_impl_reflection' redefined\" \"\" { target c++26 } }\n> #define __cpp_implicit_move 202207L // { dg-error\n> \"'__cpp_implicit_move' redefined\" \"\" { target c++23 } }\n> #define __cpp_inheriting_constructors 201511L // { dg-error\n> \"'__cpp_inheriting_constructors' redefined\" \"\" { target c++20 } }\n> #define __cpp_init_captures 201803L // { dg-error\n> \"'__cpp_init_captures' redefined\" \"\" { target c++14 } }\n> --- gcc/testsuite/g++.dg/reflect/feat1.C.jj 2026-03-27\n> 10:17:16.125298250 +0100\n> +++ gcc/testsuite/g++.dg/reflect/feat1.C 2026-04-22\n> 12:00:26.919418259 +0200\n> @@ -4,14 +4,14 @@\n>\n> #ifndef __cpp_impl_reflection\n> # error \"__cpp_impl_reflection\"\n> -#elif __cpp_impl_reflection != 202506\n> -# error \"__cpp_impl_reflection != 202506\"\n> +#elif __cpp_impl_reflection != 202603\n> +# error \"__cpp_impl_reflection != 202603\"\n> #endif\n>\n> #include \n>\n> #ifndef __cpp_lib_reflection\n> # error \"__cpp_lib_reflection\"\n> -#elif __cpp_lib_reflection != 202506\n> -# error \"__cpp_lib_reflection != 202506\"\n> +#elif __cpp_lib_reflection != 202603\n> +# error \"__cpp_lib_reflection != 202603\"\n> #endif\n> --- gcc/testsuite/g++.dg/reflect/feat2.C.jj 2026-03-27\n> 10:17:16.125298250 +0100\n> +++ gcc/testsuite/g++.dg/reflect/feat2.C 2026-04-22\n> 12:00:42.738148067 +0200\n> @@ -6,8 +6,8 @@\n>\n> #ifndef __cpp_lib_reflection\n> # error \"__cpp_lib_reflection\"\n> -#elif __cpp_lib_reflection != 202506\n> -# error \"__cpp_lib_reflection != 202506\"\n> +#elif __cpp_lib_reflection != 202603\n> +# error \"__cpp_lib_reflection != 202603\"\n> #endif\n>\n> #ifndef __cpp_lib_define_static\n> --- gcc/testsuite/g++.dg/reflect/feat3.C.jj 2026-03-27\n> 10:17:16.125298250 +0100\n> +++ gcc/testsuite/g++.dg/reflect/feat3.C 2026-04-22\n> 12:01:46.374061130 +0200\n> @@ -6,8 +6,8 @@\n>\n> #ifndef __cpp_lib_reflection\n> # error \"__cpp_lib_reflection\"\n> -#elif __cpp_lib_reflection != 202506\n> -# error \"__cpp_lib_reflection != 202506\"\n> +#elif __cpp_lib_reflection != 202603\n> +# error \"__cpp_lib_reflection != 202603\"\n> #endif\n>\n> #ifndef __cpp_lib_define_static\n> --- libstdc++-v3/include/bits/version.def.jj 2026-04-14\n> 21:13:35.039460718 +0200\n> +++ libstdc++-v3/include/bits/version.def 2026-04-22\n> 12:03:42.709074062 +0200\n> @@ -2337,9 +2337,9 @@ ftms = {\n> ftms = {\n> name = reflection;\n> values = {\n> - v = 202506;\n> + v = 202603;\n> cxxmin = 26;\n> - extra_cond = \"__cpp_impl_reflection >= 202506L\";\n> + extra_cond = \"__cpp_impl_reflection >= 202603L\";\n> cxx11abi = yes;\n> };\n> };\n> --- libstdc++-v3/include/bits/version.h.jj 2026-04-14\n> 21:13:35.039460718 +0200\n> +++ libstdc++-v3/include/bits/version.h 2026-04-22 12:03:49.126595150 +0200\n> @@ -2602,10 +2602,10 @@\n> #undef __glibcxx_want_philox_engine\n>\n> #if !defined(__cpp_lib_reflection)\n> -# if (__cplusplus > 202302L) && _GLIBCXX_USE_CXX11_ABI &&\n> (__cpp_impl_reflection >= 202506L)\n> -# define __glibcxx_reflection 202506L\n> +# if (__cplusplus > 202302L) && _GLIBCXX_USE_CXX11_ABI &&\n> (__cpp_impl_reflection >= 202603L)\n> +# define __glibcxx_reflection 202603L\n> # if defined(__glibcxx_want_all) || defined(__glibcxx_want_reflection)\n> -# define __cpp_lib_reflection 202506L\n> +# define __cpp_lib_reflection 202603L\n> # endif\n> # endif\n> #endif /* !defined(__cpp_lib_reflection) */\n> --- libstdc++-v3/include/std/meta.jj 2026-04-21 18:24:44.122033404 +0200\n> +++ libstdc++-v3/include/std/meta 2026-04-22 12:04:19.089452664 +0200\n> @@ -37,7 +37,7 @@\n> #define __glibcxx_want_define_static\n> #include \n>\n> -#if __glibcxx_reflection >= 202506L // C++ >= 26 && __cpp_impl_reflection\n> +#if __glibcxx_reflection >= 202603L // C++ >= 26 && __cpp_impl_reflection\n>\n> #include \n> #include \n> --- libstdc++-v3/include/std/type_traits.jj 2026-04-08\n> 15:33:26.695042703 +0200\n> +++ libstdc++-v3/include/std/type_traits 2026-04-22\n> 12:04:59.783757579 +0200\n> @@ -755,7 +755,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n> : public false_type { };\n> #endif\n>\n> -#if __cpp_impl_reflection >= 202506L // C++ >= 26\n> +#if __cpp_impl_reflection >= 202603L // C++ >= 26\n> /// is_reflection\n> template\n> struct is_reflection\n> @@ -844,7 +844,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n> struct is_fundamental\n> : public __or_, is_void<_Tp>,\n> is_null_pointer<_Tp>\n> -#if __cpp_impl_reflection >= 202506L\n> +#if __cpp_impl_reflection >= 202603L\n> , is_reflection<_Tp>\n> #endif\n> >::type\n> @@ -3561,7 +3561,7 @@ template \n> is_member_function_pointer<_Tp>::value;\n> #endif\n>\n> -#if __cpp_impl_reflection >= 202506L // C++ >= 26\n> +#if __cpp_impl_reflection >= 202603L // C++ >= 26\n> template \n> inline constexpr bool is_reflection_v = false;\n> template <>\n> --- libstdc++-v3/src/c++23/std.cc.in.jj 2026-04-10 08:45:20.742811345 +0200\n> +++ libstdc++-v3/src/c++23/std.cc.in 2026-04-22 12:05:31.902208977\n> +0200\n> @@ -2083,7 +2083,7 @@ export namespace std::pmr\n> }\n>\n> // \n> -#if __glibcxx_reflection >= 202506L\n> +#if __glibcxx_reflection >= 202603L\n> export namespace std\n> {\n> #if __has_builtin(__builtin_is_string_literal)\n> @@ -3572,7 +3572,7 @@ export namespace std\n> using std::is_implicit_lifetime;\n> using std::is_implicit_lifetime_v;\n> #endif\n> -#if __cpp_impl_reflection >= 202506L\n> +#if __cpp_impl_reflection >= 202603L\n> using std::is_reflection;\n> using std::is_reflection_v;\n> #endif\n> --- libstdc++-v3/testsuite/20_util/is_structural/value.cc.jj 2026-04-03\n> 20:51:17.921877231 +0200\n> +++ libstdc++-v3/testsuite/20_util/is_structural/value.cc 2026-04-22\n> 12:06:06.519617691 +0200\n> @@ -24,7 +24,7 @@ void test01()\n> static_assert(test_category(true),\n> \"\");\n> static_assert(test_category (int)>(true), \"\");\n> static_assert(test_category(true), \"\");\n> -#if __cpp_impl_reflection >= 202506L\n> +#if __cpp_impl_reflection >= 202603L\n> static_assert(test_category(true), \"\");\n> #endif\n> static_assert(test_category(true), \"\");\n> --- libstdc++-v3/testsuite/20_util/variable_templates_for_traits.cc.jj\n> 2026-04-08 07:49:13.479066346 +0200\n> +++ libstdc++-v3/testsuite/20_util/variable_templates_for_traits.cc\n> 2026-04-22 12:06:28.514242009 +0200\n> @@ -331,7 +331,7 @@ static_assert(is_convertible_v static_assert(!is_convertible_v\n> && !is_convertible::value, \"\");\n>\n> -#if __cpp_impl_reflection >= 202506L\n> +#if __cpp_impl_reflection >= 202603L\n> static_assert(is_reflection_v\n> && is_reflection::value, \"\");\n> static_assert(!is_reflection_v && !is_reflection::value, \"\");\n>\n> Jakub\n>\n>","headers":{"Return-Path":"","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=X7F2jA5x;\n\tdkim-atps=neutral","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;\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=X7F2jA5x","sourceware.org; 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__cpp_lib_reflection","To":"Jakub Jelinek ","Cc":"Jason Merrill , Jonathan Wakely ,\n gcc-patches@gcc.gnu.org, libstdc++@gcc.gnu.org","X-Mimecast-Spam-Score":"0","X-Mimecast-MFC-PROC-ID":"JmNosyde1Z1_foe8dhuiPkDfeJDA4bnXHFwOqRgKQ_c_1776854085","X-Mimecast-Originator":"redhat.com","Content-Type":"multipart/alternative; boundary=\"000000000000835e6606500a1477\"","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"}},{"id":3680501,"web_url":"http://patchwork.ozlabs.org/comment/3680501/","msgid":"","list_archive_url":null,"date":"2026-04-22T10:34:59","subject":"Re: [PATCH] c++,\n libstc++: Bump __cpp_impl_reflection and __cpp_lib_reflection","submitter":{"id":48004,"url":"http://patchwork.ozlabs.org/api/people/48004/","name":"Jonathan Wakely","email":"jwakely@redhat.com"},"content":"On Wed, 22 Apr 2026 at 11:23, Jakub Jelinek wrote:\n>\n> Hi!\n>\n> Both __cpp_impl_reflection and __cpp_lib_reflection were increased from\n> 202506L to 202603L post Croydon, I assume to show that P3795R2 (maybe some\n> issues too) have been implemented.\n> Now, we do implement P3795R2 except for the is_applicable_type,\n> is_nothrow_applicable_type and apply_result metafunctions, but Jonathan says\n> there is agreement in LWG that to test for availability of those one should\n> test __cpp_lib_reflection >= 202603L && __cpp_lib_apply >= 202603L.\n>\n> So, this patch bumps both FTMs.\n>\n> Tested on x86_64-linux, ok for trunk?\n>\n> 2026-04-22 Jakub Jelinek \n>\n> gcc/c-family/\n> * c-cppbuiltin.cc (c_cpp_builtins): Bump __cpp_impl_reflection value\n> from 202506L to 202603L.\n> gcc/testsuite/\n> * g++.dg/DRs/dr2581-2.C: Adjust for __cpp_impl_reflection bump from\n> 202506L to 202603L.\n> * g++.dg/reflect/feat1.C: Likewise. Also adjust for\n> __cpp_lib_reflection bump from 202506L to 202603L.\n> * g++.dg/reflect/feat2.C: Likewise.\n> * g++.dg/reflect/feat3.C: Likewise.\n> libstdc++-v3/\n> * include/bits/version.def (reflection): Bump 202506L to 202603L\n> for both v and in extra_cond.\n> * include/bits/version.h: Regenerate.\n> * include/std/meta: Compare __glibcxx_reflection against\n> 202603L rather than 202506L.\n> * include/std/type_traits: Compare __cpp_impl_reflection against\n> 202603L rather than 202506L.\n> * src/c++23/std.cc.in: Likewise. Compare __glibcxx_reflection against\n> 202603L rather than 202506L.\n> * testsuite/20_util/is_structural/value.cc: Compare\n> __cpp_impl_reflection against 202603L rather than 202506L.\n> * testsuite/20_util/variable_templates_for_traits.cc: Likewise.\n>\n> --- gcc/c-family/c-cppbuiltin.cc.jj 2026-03-27 10:17:13.713337609 +0100\n> +++ gcc/c-family/c-cppbuiltin.cc 2026-04-22 11:59:44.926135527 +0200\n> @@ -1119,7 +1119,7 @@ c_cpp_builtins (cpp_reader *pfile)\n> cpp_define (pfile, \"__cpp_constexpr_virtual_inheritance=202506L\");\n> cpp_define (pfile, \"__cpp_expansion_statements=202506L\");\n> if (flag_reflection)\n> - cpp_define (pfile, \"__cpp_impl_reflection=202506L\");\n> + cpp_define (pfile, \"__cpp_impl_reflection=202603L\");\n> else\n> cpp_warn (pfile, \"__cpp_impl_reflection\");\n> }\n> --- gcc/testsuite/g++.dg/DRs/dr2581-2.C.jj 2026-03-27 10:17:15.320311386 +0100\n> +++ gcc/testsuite/g++.dg/DRs/dr2581-2.C 2026-04-22 12:02:27.265362686 +0200\n> @@ -64,7 +64,7 @@\n> #define __cpp_impl_coroutine 201902L // { dg-error \"'__cpp_impl_coroutine' redefined\" \"\" { target c++20 } }\n> #define __cpp_impl_destroying_delete 201806L // { dg-error \"'__cpp_impl_destroying_delete' redefined\" \"\" { target c++20 } }\n> #define __cpp_impl_three_way_comparison 201907L // { dg-error \"'__cpp_impl_three_way_comparison' redefined\" \"\" { target c++20 } }\n> -#define __cpp_impl_reflection 202506L // { dg-error \"'__cpp_impl_reflection' redefined\" \"\" { target c++26 } }\n> +#define __cpp_impl_reflection 202603L // { dg-error \"'__cpp_impl_reflection' redefined\" \"\" { target c++26 } }\n> #define __cpp_implicit_move 202207L // { dg-error \"'__cpp_implicit_move' redefined\" \"\" { target c++23 } }\n> #define __cpp_inheriting_constructors 201511L // { dg-error \"'__cpp_inheriting_constructors' redefined\" \"\" { target c++20 } }\n> #define __cpp_init_captures 201803L // { dg-error \"'__cpp_init_captures' redefined\" \"\" { target c++14 } }\n> --- gcc/testsuite/g++.dg/reflect/feat1.C.jj 2026-03-27 10:17:16.125298250 +0100\n> +++ gcc/testsuite/g++.dg/reflect/feat1.C 2026-04-22 12:00:26.919418259 +0200\n> @@ -4,14 +4,14 @@\n>\n> #ifndef __cpp_impl_reflection\n> # error \"__cpp_impl_reflection\"\n> -#elif __cpp_impl_reflection != 202506\n> -# error \"__cpp_impl_reflection != 202506\"\n> +#elif __cpp_impl_reflection != 202603\n> +# error \"__cpp_impl_reflection != 202603\"\n> #endif\n>\n> #include \n>\n> #ifndef __cpp_lib_reflection\n> # error \"__cpp_lib_reflection\"\n> -#elif __cpp_lib_reflection != 202506\n> -# error \"__cpp_lib_reflection != 202506\"\n> +#elif __cpp_lib_reflection != 202603\n> +# error \"__cpp_lib_reflection != 202603\"\n> #endif\n> --- gcc/testsuite/g++.dg/reflect/feat2.C.jj 2026-03-27 10:17:16.125298250 +0100\n> +++ gcc/testsuite/g++.dg/reflect/feat2.C 2026-04-22 12:00:42.738148067 +0200\n> @@ -6,8 +6,8 @@\n>\n> #ifndef __cpp_lib_reflection\n> # error \"__cpp_lib_reflection\"\n> -#elif __cpp_lib_reflection != 202506\n> -# error \"__cpp_lib_reflection != 202506\"\n> +#elif __cpp_lib_reflection != 202603\n> +# error \"__cpp_lib_reflection != 202603\"\n> #endif\n>\n> #ifndef __cpp_lib_define_static\n> --- gcc/testsuite/g++.dg/reflect/feat3.C.jj 2026-03-27 10:17:16.125298250 +0100\n> +++ gcc/testsuite/g++.dg/reflect/feat3.C 2026-04-22 12:01:46.374061130 +0200\n> @@ -6,8 +6,8 @@\n>\n> #ifndef __cpp_lib_reflection\n> # error \"__cpp_lib_reflection\"\n> -#elif __cpp_lib_reflection != 202506\n> -# error \"__cpp_lib_reflection != 202506\"\n> +#elif __cpp_lib_reflection != 202603\n> +# error \"__cpp_lib_reflection != 202603\"\n> #endif\n>\n> #ifndef __cpp_lib_define_static\n> --- libstdc++-v3/include/bits/version.def.jj 2026-04-14 21:13:35.039460718 +0200\n> +++ libstdc++-v3/include/bits/version.def 2026-04-22 12:03:42.709074062 +0200\n> @@ -2337,9 +2337,9 @@ ftms = {\n> ftms = {\n> name = reflection;\n> values = {\n> - v = 202506;\n> + v = 202603;\n> cxxmin = 26;\n> - extra_cond = \"__cpp_impl_reflection >= 202506L\";\n> + extra_cond = \"__cpp_impl_reflection >= 202603L\";\n> cxx11abi = yes;\n> };\n> };\n> --- libstdc++-v3/include/bits/version.h.jj 2026-04-14 21:13:35.039460718 +0200\n> +++ libstdc++-v3/include/bits/version.h 2026-04-22 12:03:49.126595150 +0200\n> @@ -2602,10 +2602,10 @@\n> #undef __glibcxx_want_philox_engine\n>\n> #if !defined(__cpp_lib_reflection)\n> -# if (__cplusplus > 202302L) && _GLIBCXX_USE_CXX11_ABI && (__cpp_impl_reflection >= 202506L)\n> -# define __glibcxx_reflection 202506L\n> +# if (__cplusplus > 202302L) && _GLIBCXX_USE_CXX11_ABI && (__cpp_impl_reflection >= 202603L)\n> +# define __glibcxx_reflection 202603L\n> # if defined(__glibcxx_want_all) || defined(__glibcxx_want_reflection)\n> -# define __cpp_lib_reflection 202506L\n> +# define __cpp_lib_reflection 202603L\n> # endif\n> # endif\n> #endif /* !defined(__cpp_lib_reflection) */\n> --- libstdc++-v3/include/std/meta.jj 2026-04-21 18:24:44.122033404 +0200\n> +++ libstdc++-v3/include/std/meta 2026-04-22 12:04:19.089452664 +0200\n> @@ -37,7 +37,7 @@\n> #define __glibcxx_want_define_static\n> #include \n>\n> -#if __glibcxx_reflection >= 202506L // C++ >= 26 && __cpp_impl_reflection\n> +#if __glibcxx_reflection >= 202603L // C++ >= 26 && __cpp_impl_reflection\n\nI don't think we need to change any of the #if checks below here,\nbecause nothing in those #if groups was changed by P3795. The checks\nin e.g. and the tests are saying \"is the value of the\nmacro high enough that we should provide these features?\" and that's\ntrue for the old value.\n\n\n>\n> #include \n> #include \n> --- libstdc++-v3/include/std/type_traits.jj 2026-04-08 15:33:26.695042703 +0200\n> +++ libstdc++-v3/include/std/type_traits 2026-04-22 12:04:59.783757579 +0200\n> @@ -755,7 +755,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n> : public false_type { };\n> #endif\n>\n> -#if __cpp_impl_reflection >= 202506L // C++ >= 26\n> +#if __cpp_impl_reflection >= 202603L // C++ >= 26\n> /// is_reflection\n> template\n> struct is_reflection\n> @@ -844,7 +844,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n> struct is_fundamental\n> : public __or_, is_void<_Tp>,\n> is_null_pointer<_Tp>\n> -#if __cpp_impl_reflection >= 202506L\n> +#if __cpp_impl_reflection >= 202603L\n> , is_reflection<_Tp>\n> #endif\n> >::type\n> @@ -3561,7 +3561,7 @@ template \n> is_member_function_pointer<_Tp>::value;\n> #endif\n>\n> -#if __cpp_impl_reflection >= 202506L // C++ >= 26\n> +#if __cpp_impl_reflection >= 202603L // C++ >= 26\n> template \n> inline constexpr bool is_reflection_v = false;\n> template <>\n> --- libstdc++-v3/src/c++23/std.cc.in.jj 2026-04-10 08:45:20.742811345 +0200\n> +++ libstdc++-v3/src/c++23/std.cc.in 2026-04-22 12:05:31.902208977 +0200\n> @@ -2083,7 +2083,7 @@ export namespace std::pmr\n> }\n>\n> // \n> -#if __glibcxx_reflection >= 202506L\n> +#if __glibcxx_reflection >= 202603L\n> export namespace std\n> {\n> #if __has_builtin(__builtin_is_string_literal)\n> @@ -3572,7 +3572,7 @@ export namespace std\n> using std::is_implicit_lifetime;\n> using std::is_implicit_lifetime_v;\n> #endif\n> -#if __cpp_impl_reflection >= 202506L\n> +#if __cpp_impl_reflection >= 202603L\n> using std::is_reflection;\n> using std::is_reflection_v;\n> #endif\n> --- libstdc++-v3/testsuite/20_util/is_structural/value.cc.jj 2026-04-03 20:51:17.921877231 +0200\n> +++ libstdc++-v3/testsuite/20_util/is_structural/value.cc 2026-04-22 12:06:06.519617691 +0200\n> @@ -24,7 +24,7 @@ void test01()\n> static_assert(test_category(true), \"\");\n> static_assert(test_category(true), \"\");\n> static_assert(test_category(true), \"\");\n> -#if __cpp_impl_reflection >= 202506L\n> +#if __cpp_impl_reflection >= 202603L\n> static_assert(test_category(true), \"\");\n> #endif\n> static_assert(test_category(true), \"\");\n> --- libstdc++-v3/testsuite/20_util/variable_templates_for_traits.cc.jj 2026-04-08 07:49:13.479066346 +0200\n> +++ libstdc++-v3/testsuite/20_util/variable_templates_for_traits.cc 2026-04-22 12:06:28.514242009 +0200\n> @@ -331,7 +331,7 @@ static_assert(is_convertible_v static_assert(!is_convertible_v\n> && !is_convertible::value, \"\");\n>\n> -#if __cpp_impl_reflection >= 202506L\n> +#if __cpp_impl_reflection >= 202603L\n> static_assert(is_reflection_v\n> && is_reflection::value, \"\");\n> static_assert(!is_reflection_v && !is_reflection::value, \"\");\n>\n> Jakub\n>","headers":{"Return-Path":"","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=HRm7qwJ7;\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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Wed, 22 Apr 2026\n 03:35:15 -0700 (PDT)"],"MIME-Version":"1.0","References":"","In-Reply-To":"","From":"Jonathan Wakely ","Date":"Wed, 22 Apr 2026 11:34:59 +0100","X-Gm-Features":"AQROBzCBEepc3Qs2Sl3_sLTKD-iklWg8jfzEeogkRXClQ9CPvKN86kiYRP3cRa0","Message-ID":"\n ","Subject":"Re: [PATCH] c++,\n libstc++: Bump __cpp_impl_reflection and __cpp_lib_reflection","To":"Jakub Jelinek ","Cc":"Jason Merrill , gcc-patches@gcc.gnu.org,\n libstdc++@gcc.gnu.org","X-Mimecast-Spam-Score":"0","X-Mimecast-MFC-PROC-ID":"GPE-FzmpOO2WB6E9P5FihecdIunB85-gRvbSOKPz_CA_1776854116","X-Mimecast-Originator":"redhat.com","Content-Type":"text/plain; charset=\"UTF-8\"","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"}},{"id":3680506,"web_url":"http://patchwork.ozlabs.org/comment/3680506/","msgid":"","list_archive_url":null,"date":"2026-04-22T10:36:01","subject":"Re: [PATCH] c++,\n libstc++: Bump __cpp_impl_reflection and __cpp_lib_reflection","submitter":{"id":48004,"url":"http://patchwork.ozlabs.org/api/people/48004/","name":"Jonathan Wakely","email":"jwakely@redhat.com"},"content":"On Wed, 22 Apr 2026 at 11:34, Jonathan Wakely wrote:\n>\n> On Wed, 22 Apr 2026 at 11:23, Jakub Jelinek wrote:\n> >\n> > Hi!\n> >\n> > Both __cpp_impl_reflection and __cpp_lib_reflection were increased from\n> > 202506L to 202603L post Croydon, I assume to show that P3795R2 (maybe some\n> > issues too) have been implemented.\n> > Now, we do implement P3795R2 except for the is_applicable_type,\n> > is_nothrow_applicable_type and apply_result metafunctions, but Jonathan says\n> > there is agreement in LWG that to test for availability of those one should\n> > test __cpp_lib_reflection >= 202603L && __cpp_lib_apply >= 202603L.\n> >\n> > So, this patch bumps both FTMs.\n> >\n> > Tested on x86_64-linux, ok for trunk?\n> >\n> > 2026-04-22 Jakub Jelinek \n> >\n> > gcc/c-family/\n> > * c-cppbuiltin.cc (c_cpp_builtins): Bump __cpp_impl_reflection value\n> > from 202506L to 202603L.\n> > gcc/testsuite/\n> > * g++.dg/DRs/dr2581-2.C: Adjust for __cpp_impl_reflection bump from\n> > 202506L to 202603L.\n> > * g++.dg/reflect/feat1.C: Likewise. Also adjust for\n> > __cpp_lib_reflection bump from 202506L to 202603L.\n> > * g++.dg/reflect/feat2.C: Likewise.\n> > * g++.dg/reflect/feat3.C: Likewise.\n> > libstdc++-v3/\n> > * include/bits/version.def (reflection): Bump 202506L to 202603L\n> > for both v and in extra_cond.\n> > * include/bits/version.h: Regenerate.\n> > * include/std/meta: Compare __glibcxx_reflection against\n> > 202603L rather than 202506L.\n> > * include/std/type_traits: Compare __cpp_impl_reflection against\n> > 202603L rather than 202506L.\n> > * src/c++23/std.cc.in: Likewise. Compare __glibcxx_reflection against\n> > 202603L rather than 202506L.\n> > * testsuite/20_util/is_structural/value.cc: Compare\n> > __cpp_impl_reflection against 202603L rather than 202506L.\n> > * testsuite/20_util/variable_templates_for_traits.cc: Likewise.\n> >\n> > --- gcc/c-family/c-cppbuiltin.cc.jj 2026-03-27 10:17:13.713337609 +0100\n> > +++ gcc/c-family/c-cppbuiltin.cc 2026-04-22 11:59:44.926135527 +0200\n> > @@ -1119,7 +1119,7 @@ c_cpp_builtins (cpp_reader *pfile)\n> > cpp_define (pfile, \"__cpp_constexpr_virtual_inheritance=202506L\");\n> > cpp_define (pfile, \"__cpp_expansion_statements=202506L\");\n> > if (flag_reflection)\n> > - cpp_define (pfile, \"__cpp_impl_reflection=202506L\");\n> > + cpp_define (pfile, \"__cpp_impl_reflection=202603L\");\n> > else\n> > cpp_warn (pfile, \"__cpp_impl_reflection\");\n> > }\n> > --- gcc/testsuite/g++.dg/DRs/dr2581-2.C.jj 2026-03-27 10:17:15.320311386 +0100\n> > +++ gcc/testsuite/g++.dg/DRs/dr2581-2.C 2026-04-22 12:02:27.265362686 +0200\n> > @@ -64,7 +64,7 @@\n> > #define __cpp_impl_coroutine 201902L // { dg-error \"'__cpp_impl_coroutine' redefined\" \"\" { target c++20 } }\n> > #define __cpp_impl_destroying_delete 201806L // { dg-error \"'__cpp_impl_destroying_delete' redefined\" \"\" { target c++20 } }\n> > #define __cpp_impl_three_way_comparison 201907L // { dg-error \"'__cpp_impl_three_way_comparison' redefined\" \"\" { target c++20 } }\n> > -#define __cpp_impl_reflection 202506L // { dg-error \"'__cpp_impl_reflection' redefined\" \"\" { target c++26 } }\n> > +#define __cpp_impl_reflection 202603L // { dg-error \"'__cpp_impl_reflection' redefined\" \"\" { target c++26 } }\n> > #define __cpp_implicit_move 202207L // { dg-error \"'__cpp_implicit_move' redefined\" \"\" { target c++23 } }\n> > #define __cpp_inheriting_constructors 201511L // { dg-error \"'__cpp_inheriting_constructors' redefined\" \"\" { target c++20 } }\n> > #define __cpp_init_captures 201803L // { dg-error \"'__cpp_init_captures' redefined\" \"\" { target c++14 } }\n> > --- gcc/testsuite/g++.dg/reflect/feat1.C.jj 2026-03-27 10:17:16.125298250 +0100\n> > +++ gcc/testsuite/g++.dg/reflect/feat1.C 2026-04-22 12:00:26.919418259 +0200\n> > @@ -4,14 +4,14 @@\n> >\n> > #ifndef __cpp_impl_reflection\n> > # error \"__cpp_impl_reflection\"\n> > -#elif __cpp_impl_reflection != 202506\n> > -# error \"__cpp_impl_reflection != 202506\"\n> > +#elif __cpp_impl_reflection != 202603\n> > +# error \"__cpp_impl_reflection != 202603\"\n> > #endif\n> >\n> > #include \n> >\n> > #ifndef __cpp_lib_reflection\n> > # error \"__cpp_lib_reflection\"\n> > -#elif __cpp_lib_reflection != 202506\n> > -# error \"__cpp_lib_reflection != 202506\"\n> > +#elif __cpp_lib_reflection != 202603\n> > +# error \"__cpp_lib_reflection != 202603\"\n> > #endif\n> > --- gcc/testsuite/g++.dg/reflect/feat2.C.jj 2026-03-27 10:17:16.125298250 +0100\n> > +++ gcc/testsuite/g++.dg/reflect/feat2.C 2026-04-22 12:00:42.738148067 +0200\n> > @@ -6,8 +6,8 @@\n> >\n> > #ifndef __cpp_lib_reflection\n> > # error \"__cpp_lib_reflection\"\n> > -#elif __cpp_lib_reflection != 202506\n> > -# error \"__cpp_lib_reflection != 202506\"\n> > +#elif __cpp_lib_reflection != 202603\n> > +# error \"__cpp_lib_reflection != 202603\"\n> > #endif\n> >\n> > #ifndef __cpp_lib_define_static\n> > --- gcc/testsuite/g++.dg/reflect/feat3.C.jj 2026-03-27 10:17:16.125298250 +0100\n> > +++ gcc/testsuite/g++.dg/reflect/feat3.C 2026-04-22 12:01:46.374061130 +0200\n> > @@ -6,8 +6,8 @@\n> >\n> > #ifndef __cpp_lib_reflection\n> > # error \"__cpp_lib_reflection\"\n> > -#elif __cpp_lib_reflection != 202506\n> > -# error \"__cpp_lib_reflection != 202506\"\n> > +#elif __cpp_lib_reflection != 202603\n> > +# error \"__cpp_lib_reflection != 202603\"\n> > #endif\n> >\n> > #ifndef __cpp_lib_define_static\n> > --- libstdc++-v3/include/bits/version.def.jj 2026-04-14 21:13:35.039460718 +0200\n> > +++ libstdc++-v3/include/bits/version.def 2026-04-22 12:03:42.709074062 +0200\n> > @@ -2337,9 +2337,9 @@ ftms = {\n> > ftms = {\n> > name = reflection;\n> > values = {\n> > - v = 202506;\n> > + v = 202603;\n> > cxxmin = 26;\n> > - extra_cond = \"__cpp_impl_reflection >= 202506L\";\n> > + extra_cond = \"__cpp_impl_reflection >= 202603L\";\n> > cxx11abi = yes;\n> > };\n> > };\n> > --- libstdc++-v3/include/bits/version.h.jj 2026-04-14 21:13:35.039460718 +0200\n> > +++ libstdc++-v3/include/bits/version.h 2026-04-22 12:03:49.126595150 +0200\n> > @@ -2602,10 +2602,10 @@\n> > #undef __glibcxx_want_philox_engine\n> >\n> > #if !defined(__cpp_lib_reflection)\n> > -# if (__cplusplus > 202302L) && _GLIBCXX_USE_CXX11_ABI && (__cpp_impl_reflection >= 202506L)\n> > -# define __glibcxx_reflection 202506L\n> > +# if (__cplusplus > 202302L) && _GLIBCXX_USE_CXX11_ABI && (__cpp_impl_reflection >= 202603L)\n> > +# define __glibcxx_reflection 202603L\n> > # if defined(__glibcxx_want_all) || defined(__glibcxx_want_reflection)\n> > -# define __cpp_lib_reflection 202506L\n> > +# define __cpp_lib_reflection 202603L\n> > # endif\n> > # endif\n> > #endif /* !defined(__cpp_lib_reflection) */\n> > --- libstdc++-v3/include/std/meta.jj 2026-04-21 18:24:44.122033404 +0200\n> > +++ libstdc++-v3/include/std/meta 2026-04-22 12:04:19.089452664 +0200\n> > @@ -37,7 +37,7 @@\n> > #define __glibcxx_want_define_static\n> > #include \n> >\n> > -#if __glibcxx_reflection >= 202506L // C++ >= 26 && __cpp_impl_reflection\n> > +#if __glibcxx_reflection >= 202603L // C++ >= 26 && __cpp_impl_reflection\n>\n> I don't think we need to change any of the #if checks below here,\n> because nothing in those #if groups was changed by P3795. The checks\n> in e.g. and the tests are saying \"is the value of the\n> macro high enough that we should provide these features?\" and that's\n> true for the old value.\n\nThe #if in guards the addition of the annotations vector to\ndata_member_spec, so checking the new value there makes sense.\n\n>\n>\n> >\n> > #include \n> > #include \n> > --- libstdc++-v3/include/std/type_traits.jj 2026-04-08 15:33:26.695042703 +0200\n> > +++ libstdc++-v3/include/std/type_traits 2026-04-22 12:04:59.783757579 +0200\n> > @@ -755,7 +755,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n> > : public false_type { };\n> > #endif\n> >\n> > -#if __cpp_impl_reflection >= 202506L // C++ >= 26\n> > +#if __cpp_impl_reflection >= 202603L // C++ >= 26\n> > /// is_reflection\n> > template\n> > struct is_reflection\n> > @@ -844,7 +844,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n> > struct is_fundamental\n> > : public __or_, is_void<_Tp>,\n> > is_null_pointer<_Tp>\n> > -#if __cpp_impl_reflection >= 202506L\n> > +#if __cpp_impl_reflection >= 202603L\n> > , is_reflection<_Tp>\n> > #endif\n> > >::type\n> > @@ -3561,7 +3561,7 @@ template \n> > is_member_function_pointer<_Tp>::value;\n> > #endif\n> >\n> > -#if __cpp_impl_reflection >= 202506L // C++ >= 26\n> > +#if __cpp_impl_reflection >= 202603L // C++ >= 26\n> > template \n> > inline constexpr bool is_reflection_v = false;\n> > template <>\n> > --- libstdc++-v3/src/c++23/std.cc.in.jj 2026-04-10 08:45:20.742811345 +0200\n> > +++ libstdc++-v3/src/c++23/std.cc.in 2026-04-22 12:05:31.902208977 +0200\n> > @@ -2083,7 +2083,7 @@ export namespace std::pmr\n> > }\n> >\n> > // \n> > -#if __glibcxx_reflection >= 202506L\n> > +#if __glibcxx_reflection >= 202603L\n> > export namespace std\n> > {\n> > #if __has_builtin(__builtin_is_string_literal)\n> > @@ -3572,7 +3572,7 @@ export namespace std\n> > using std::is_implicit_lifetime;\n> > using std::is_implicit_lifetime_v;\n> > #endif\n> > -#if __cpp_impl_reflection >= 202506L\n> > +#if __cpp_impl_reflection >= 202603L\n> > using std::is_reflection;\n> > using std::is_reflection_v;\n> > #endif\n> > --- libstdc++-v3/testsuite/20_util/is_structural/value.cc.jj 2026-04-03 20:51:17.921877231 +0200\n> > +++ libstdc++-v3/testsuite/20_util/is_structural/value.cc 2026-04-22 12:06:06.519617691 +0200\n> > @@ -24,7 +24,7 @@ void test01()\n> > static_assert(test_category(true), \"\");\n> > static_assert(test_category(true), \"\");\n> > static_assert(test_category(true), \"\");\n> > -#if __cpp_impl_reflection >= 202506L\n> > +#if __cpp_impl_reflection >= 202603L\n> > static_assert(test_category(true), \"\");\n> > #endif\n> > static_assert(test_category(true), \"\");\n> > --- libstdc++-v3/testsuite/20_util/variable_templates_for_traits.cc.jj 2026-04-08 07:49:13.479066346 +0200\n> > +++ libstdc++-v3/testsuite/20_util/variable_templates_for_traits.cc 2026-04-22 12:06:28.514242009 +0200\n> > @@ -331,7 +331,7 @@ static_assert(is_convertible_v > static_assert(!is_convertible_v\n> > && !is_convertible::value, \"\");\n> >\n> > -#if __cpp_impl_reflection >= 202506L\n> > +#if __cpp_impl_reflection >= 202603L\n> > static_assert(is_reflection_v\n> > && is_reflection::value, \"\");\n> > static_assert(!is_reflection_v && !is_reflection::value, \"\");\n> >\n> > Jakub\n> >","headers":{"Return-Path":"","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=hb6AhMRZ;\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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Wed, 22 Apr 2026\n 03:36:18 -0700 (PDT)"],"MIME-Version":"1.0","References":"\n ","In-Reply-To":"\n ","From":"Jonathan Wakely ","Date":"Wed, 22 Apr 2026 11:36:01 +0100","X-Gm-Features":"AQROBzD6ebYD0MIyVAbE5P6xlaPV0AiW1IX8SLvQCl0hy2JDgRBrXawndkQ9gOw","Message-ID":"\n ","Subject":"Re: [PATCH] c++,\n libstc++: Bump __cpp_impl_reflection and __cpp_lib_reflection","To":"Jakub Jelinek ","Cc":"Jason Merrill , gcc-patches@gcc.gnu.org,\n libstdc++@gcc.gnu.org","X-Mimecast-Spam-Score":"0","X-Mimecast-MFC-PROC-ID":"pxOw568l8p9uJLLy4Kap76dm8QeVhZ3flRA7qzOkBaU_1776854179","X-Mimecast-Originator":"redhat.com","Content-Type":"text/plain; charset=\"UTF-8\"","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"}}]