{"id":2227720,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2227720/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/patch/20260424065244.262557-1-tkaminsk@redhat.com/","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/1.1/projects/17/?format=json","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":"<20260424065244.262557-1-tkaminsk@redhat.com>","date":"2026-04-24T06:41:08","name":"[v2,1/4] libstdc++: Merged concept for ranges with static sized.","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"664b013d657a3f85e226ba3b02d91407f72ff8b4","submitter":{"id":90409,"url":"http://patchwork.ozlabs.org/api/1.1/people/90409/?format=json","name":"Tomasz Kamiński","email":"tkaminsk@redhat.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/20260424065244.262557-1-tkaminsk@redhat.com/mbox/","series":[{"id":501310,"url":"http://patchwork.ozlabs.org/api/1.1/series/501310/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/list/?series=501310","date":"2026-04-24T06:41:08","name":"[v2,1/4] libstdc++: Merged concept for ranges with static sized.","version":2,"mbox":"http://patchwork.ozlabs.org/series/501310/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227720/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227720/checks/","tags":{},"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=dQqbx4TK;\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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charset=\"US-ASCII\"; x-default=true","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"},"content":"This patch replaces duplicated __detail::__statically_sized (from std/meta)\nand simd::__static_sized_range (from include/bits/simd_details.h) concepts\nwith single range::__static_sized_range. The concept uses the implementation\nbased on __statically_sized concept, as it avoids triggering instantiations\nof some class template for each possible size value.\n\nlibstdc++-v3/ChangeLog:\n\n\t* include/bits/ranges_base.h (ranges::__static_sized_range):\n\tDefine.\n\t* include/bits/simd_details.h (simd::__static_sized_range):\n\tRemove.\n\t(simd::__static_range_size): Use ranges::__static_sized_range.\n\t* include/bits/simd_loadstore.h (simd::unchecked_store):\n\t(simd::unchecked_load): Use ranges::__static_sized_range.\n\t* include/bits/simd_vec.h (basic_vec::basic_vec(_Rg&&, flags<_Flags>):\n\tReplace __static_sized_range<_Rg, _S_size> with\n\tranges::__static_sized_range<_Rg> and traing requires size\n\tfor size value.\n\t* include/std/meta (__detail::__statically_sized): Remove.\n\t(std::define_static_array): Use ranges::__static_sized_range.\n\t* testsuite/std/simd/traits_impl.cc: Remove test for\n\tsimd::__static_sized_range.\n---\nThis is new patch in v2 as similar concepts landed before this series.\nUsing Jakub's version, as it does not require template instantiations.\n\nTested on x86_64-linux. OK for trunk?\n\n libstdc++-v3/include/bits/ranges_base.h | 6 ++++++\n libstdc++-v3/include/bits/simd_details.h | 9 +--------\n libstdc++-v3/include/bits/simd_loadstore.h | 8 ++++----\n libstdc++-v3/include/bits/simd_vec.h | 12 +++++++-----\n libstdc++-v3/include/std/meta | 12 +-----------\n libstdc++-v3/testsuite/std/simd/traits_impl.cc | 4 ----\n 6 files changed, 19 insertions(+), 32 deletions(-)","diff":"diff --git a/libstdc++-v3/include/bits/ranges_base.h b/libstdc++-v3/include/bits/ranges_base.h\nindex 519927f5613..fea4100eb09 100644\n--- a/libstdc++-v3/include/bits/ranges_base.h\n+++ b/libstdc++-v3/include/bits/ranges_base.h\n@@ -558,6 +558,12 @@ namespace ranges\n template\n using range_size_t = decltype(ranges::size(std::declval<_Range&>()));\n \n+#if __cplusplus > 202302L\n+ template\n+ concept __static_sized_range = sized_range<_Tp> && requires (_Tp& __t)\n+ { static_cast= 0)]>(nullptr); };\n+#endif // C++26\n+\n template\n requires is_class_v<_Derived> && same_as<_Derived, remove_cv_t<_Derived>>\n class view_interface; // defined in \ndiff --git a/libstdc++-v3/include/bits/simd_details.h b/libstdc++-v3/include/bits/simd_details.h\nindex a1acc5bd946..e2002b6de82 100644\n--- a/libstdc++-v3/include/bits/simd_details.h\n+++ b/libstdc++-v3/include/bits/simd_details.h\n@@ -986,18 +986,11 @@ namespace simd\n using mask = basic_mask>;\n \n // [simd.ctor] load constructor constraints\n- template \n- concept __static_sized_range\n- = ranges::sized_range<_Tp> && requires(_Tp&& __r) {\n-\ttypename integral_constant;\n-\trequires (_Np == -1uz || ranges::size(__r) == _Np);\n- };\n-\n template \n consteval size_t\n __static_range_size(_Rg& __r)\n {\n- if constexpr (requires { typename integral_constant; })\n+ if constexpr (ranges::__static_sized_range<_Rg>)\n \treturn ranges::size(__r);\n else\n \treturn dynamic_extent;\ndiff --git a/libstdc++-v3/include/bits/simd_loadstore.h b/libstdc++-v3/include/bits/simd_loadstore.h\nindex 20c5fb5cf7f..2390ea289f5 100644\n--- a/libstdc++-v3/include/bits/simd_loadstore.h\n+++ b/libstdc++-v3/include/bits/simd_loadstore.h\n@@ -75,7 +75,7 @@ namespace simd\n constexpr bool __allow_out_of_bounds = __f._S_test(__allow_partial_loadstore);\n constexpr size_t __static_size = __static_range_size(__r);\n \n- if constexpr (!__allow_out_of_bounds && __static_sized_range<_Rg>)\n+ if constexpr (!__allow_out_of_bounds && ranges::__static_sized_range<_Rg>)\n \tstatic_assert(ranges::size(__r) >= _RV::size(), \"given range must have sufficient size\");\n \n const auto* __ptr = __f.template _S_adjust_pointer<_RV>(ranges::data(__r));\n@@ -121,7 +121,7 @@ namespace simd\n constexpr bool __allow_out_of_bounds = __f._S_test(__allow_partial_loadstore);\n constexpr auto __static_size = __static_range_size(__r);\n \n- if constexpr (!__allow_out_of_bounds && __static_sized_range<_Rg>)\n+ if constexpr (!__allow_out_of_bounds && ranges::__static_sized_range<_Rg>)\n \tstatic_assert(ranges::size(__r) >= _RV::size(), \"given range must have sufficient size\");\n \n const auto* __ptr = __f.template _S_adjust_pointer<_RV>(ranges::data(__r));\n@@ -248,7 +248,7 @@ namespace simd\n \t\t \"'flag_convert' must be used for conversions that are not value-preserving\");\n \n constexpr bool __allow_out_of_bounds = __f._S_test(__allow_partial_loadstore);\n- if constexpr (!__allow_out_of_bounds && __static_sized_range<_Rg>)\n+ if constexpr (!__allow_out_of_bounds && ranges::__static_sized_range<_Rg>)\n \tstatic_assert(ranges::size(__r) >= _TV::size(), \"given range must have sufficient size\");\n \n auto* __ptr = __f.template _S_adjust_pointer<_TV>(ranges::data(__r));\n@@ -285,7 +285,7 @@ namespace simd\n \t\t \"'flag_convert' must be used for conversions that are not value-preserving\");\n \n constexpr bool __allow_out_of_bounds = __f._S_test(__allow_partial_loadstore);\n- if constexpr (!__allow_out_of_bounds && __static_sized_range<_Rg>)\n+ if constexpr (!__allow_out_of_bounds && ranges::__static_sized_range<_Rg>)\n \tstatic_assert(ranges::size(__r) >= _TV::size(), \"given range must have sufficient size\");\n \n auto* __ptr = __f.template _S_adjust_pointer<_TV>(ranges::data(__r));\ndiff --git a/libstdc++-v3/include/bits/simd_vec.h b/libstdc++-v3/include/bits/simd_vec.h\nindex 5f3bd7fd2f6..6657587e4d4 100644\n--- a/libstdc++-v3/include/bits/simd_vec.h\n+++ b/libstdc++-v3/include/bits/simd_vec.h\n@@ -1207,14 +1207,15 @@ namespace simd\n \t}\n \n template \n-\trequires __static_sized_range<_Rg, _S_size>\n+\trequires ranges::__static_sized_range<_Rg>\n \t && __vectorizable>\n \t && __explicitly_convertible_to, value_type>\n \t[[__gnu__::__always_inline__]]\n \tconstexpr\n \tbasic_vec(_Rg&& __range, flags<_Flags...> __flags = {})\n-\t : basic_vec(_LoadCtorTag(), __flags.template _S_adjust_pointer(\n-\t\t\t\t\tranges::data(__range)))\n+\trequires (ranges::size(__range) == _S_size)\n+\t: basic_vec(_LoadCtorTag(), __flags.template _S_adjust_pointer(\n+\t\t\t\t ranges::data(__range)))\n \t{\n \t static_assert(__loadstore_convertible_to, value_type,\n \t\t\t\t\t\t _Flags...>);\n@@ -2072,11 +2073,12 @@ namespace simd\n \t{}\n \n template \n-\trequires __static_sized_range<_Rg, _S_size>\n+\trequires ranges::__static_sized_range<_Rg>\n \t && __vectorizable>\n \t && __explicitly_convertible_to, value_type>\n \tconstexpr\n \tbasic_vec(_Rg&& __range, flags<_Flags...> __flags = {})\n+\trequires (ranges::size(__range) == _S_size)\n \t: basic_vec(_LoadCtorTag(),\n \t\t __flags.template _S_adjust_pointer(ranges::data(__range)))\n \t{\n@@ -2245,7 +2247,7 @@ namespace simd\n \n // [simd.overview] deduction guide ------------------------------------------\n template \n- requires __static_sized_range<_Rg>\n+ requires ranges::__static_sized_range<_Rg>\n basic_vec(_Rg&& __r, _Ts...)\n -> basic_vec,\n \t\t __deduce_abi_t,\ndiff --git a/libstdc++-v3/include/std/meta b/libstdc++-v3/include/std/meta\nindex 21a4df45bfc..bc04dddcb64 100644\n--- a/libstdc++-v3/include/std/meta\n+++ b/libstdc++-v3/include/std/meta\n@@ -640,16 +640,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n return meta::extract*>(__str);\n }\n \n- namespace __detail\n- {\n- template\n- concept __statically_sized\n- = requires(_Rg&& __r) {\n-\tstatic_cast(ranges::size(__r))\n-\t\t\t >= 0]>(nullptr);\n- };\n- } // namespace __detail\n-\n template\n consteval auto\n define_static_array(_Rg&& __r)\n@@ -657,7 +647,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n using _Tp = ranges::range_value_t<_Rg>;\n auto __array = meta::reflect_constant_array(__r);\n auto __type = meta::type_of(__array);\n- if constexpr (__detail::__statically_sized<_Rg>)\n+ if constexpr (ranges::__static_sized_range<_Rg>)\n \t{\n \t constexpr size_t __extent = static_cast(ranges::size(__r));\n \t if constexpr (__extent)\ndiff --git a/libstdc++-v3/testsuite/std/simd/traits_impl.cc b/libstdc++-v3/testsuite/std/simd/traits_impl.cc\nindex 2f705c7df2f..02e2b690a6a 100644\n--- a/libstdc++-v3/testsuite/std/simd/traits_impl.cc\n+++ b/libstdc++-v3/testsuite/std/simd/traits_impl.cc\n@@ -83,10 +83,6 @@ void test()\n static_assert(!__streq_to_1(\"0\"));\n static_assert(!__streq_to_1(\"1 \"));\n \n- static_assert(__static_sized_range);\n- static_assert(__static_sized_range);\n- static_assert(__static_sized_range, 4>);\n-\n static_assert( __value_preserving_convertible_to);\n static_assert(!__value_preserving_convertible_to);\n static_assert( __value_preserving_convertible_to);\n","prefixes":["v2","1/4"]}