[{"id":3669063,"web_url":"http://patchwork.ozlabs.org/comment/3669063/","msgid":"","list_archive_url":null,"date":"2026-03-25T12:39:59","subject":"Re: [PATCH] c++: Fix up reflect_constant_{array,string}2.C for\n installed testing [PR124621]","submitter":{"id":14370,"url":"http://patchwork.ozlabs.org/api/people/14370/","name":"Marek Polacek","email":"polacek@redhat.com"},"content":"On Wed, Mar 25, 2026 at 12:00:15PM +0100, Jakub Jelinek wrote:\n> Hi!\n> \n> These two tests behave differently when using in-tree testing vs.\n> out-of-tree testing.\n> In the former case, libstdc++-v3/scripts/testsuite_flags uses\n> -nostdinc++ -I.../libstdc++-v3/include/x86_64-pc-linux-gnu etc.,\n> so the libstdc++ headers aren't considered system headers, while\n> with out-of-tree testing they are.\n> And the aka printing uses user_facing_original_type_p which depends on\n> /* Look through any typedef in \"user\" code. */\n> if (!DECL_IN_SYSTEM_HEADER (decl) && !DECL_IS_UNDECLARED_BUILTIN (decl))\n> return true;\n> and so behaves differently (and arguably in this case the non-system headers\n> output is nicer).\n> \n> Anyway, the following patch adjusts the tests so that they accept both\n> forms.\n> \n> Tested on x86_64-linux in-tree and Torbjorn has tested it in arm-none-eabi\n> out-of-tree testing. Ok for trunk?\n\nLooks OK.\n \n> 2026-03-25 Jakub Jelinek \n> \n> \tPR testsuite/124621\n> \t* g++.dg/reflect/reflect_constant_array2.C: Allow different aka\n> \targument in diagnostics for in-tree vs. out-of-tree testing.\n> \t* g++.dg/reflect/reflect_constant_string2.C: Likewise.\n> \n> --- gcc/testsuite/g++.dg/reflect/reflect_constant_array2.C.jj\t2026-01-15 16:33:47.014097840 +0100\n> +++ gcc/testsuite/g++.dg/reflect/reflect_constant_array2.C\t2026-03-25 11:27:34.568796335 +0100\n> @@ -10,8 +10,8 @@ using namespace std::meta;\n> \n> struct A { int a, b; mutable int c; };\n> constexpr auto a = reflect_constant_array (std::vector { A { 1, 2, 3 } });\n> -// { dg-error \"'reflect_constant_array' argument with 'std::ranges::range_value_t >' \\\\\\{aka 'A'\\\\\\} which is not a structural type\" \"\" { target *-*-* } .-1 }\n> +// { dg-error \"'reflect_constant_array' argument with 'std::ranges::range_value_t >' \\\\\\{aka '(A|std::iter_value_t<__gnu_cxx::__normal_iterator > >)'\\\\\\} which is not a structural type\" \"\" { target *-*-* } .-1 }\n> struct B { constexpr B (int x, int y) : a (x), b (y) {} constexpr ~B () {} B (const B &) = delete; int a, b; };\n> constexpr B b[2] = { { 1, 2 }, { 2, 3 } };\n> constexpr auto c = reflect_constant_array (b);\n> -// { dg-error \"'reflect_constant_array' argument with 'std::ranges::range_value_t' \\\\\\{aka 'B'\\\\\\} which is not copy constructible\" \"\" { target *-*-* } .-1 }\n> +// { dg-error \"'reflect_constant_array' argument with 'std::ranges::range_value_t' \\\\\\{aka '(B|std::iter_value_t)'\\\\\\} which is not copy constructible\" \"\" { target *-*-* } .-1 }\n> --- gcc/testsuite/g++.dg/reflect/reflect_constant_string2.C.jj\t2026-01-15 16:33:47.015097823 +0100\n> +++ gcc/testsuite/g++.dg/reflect/reflect_constant_string2.C\t2026-03-25 11:28:21.181009946 +0100\n> @@ -11,4 +11,4 @@ using namespace std::meta;\n> struct V { int a, b, c; };\n> constexpr auto a = reflect_constant_string (std::vector { 42, 43, 44 });\t// { dg-error \"'reflect_constant_string' called with 'std::ranges::range_value_t >' \\\\\\{aka 'int'\\\\\\} rather than 'char', 'wchar_t', 'char8_t', 'char16_t' or 'char32_t'\" }\n> constexpr auto b = reflect_constant_string (std::vector {});\t\t// { dg-error \"'reflect_constant_string' called with 'std::ranges::range_value_t >' \\\\\\{aka 'float'\\\\\\} rather than 'char', 'wchar_t', 'char8_t', 'char16_t' or 'char32_t'\" }\n> -constexpr auto c = reflect_constant_string (std::vector { V { 1, 2, 3 } });\t// { dg-error \"'reflect_constant_string' called with 'std::ranges::range_value_t >' \\\\\\{aka 'V'\\\\\\} rather than 'char', 'wchar_t', 'char8_t', 'char16_t' or 'char32_t'\" }\n> +constexpr auto c = reflect_constant_string (std::vector { V { 1, 2, 3 } });\t// { dg-error \"'reflect_constant_string' called with 'std::ranges::range_value_t >' \\\\\\{aka '(V|std::iter_value_t<__gnu_cxx::__normal_iterator > >)'\\\\\\} rather than 'char', 'wchar_t', 'char8_t', 'char16_t' or 'char32_t'\" }\n> \n> \tJakub\n> \n\nMarek","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=Nb4als0e;\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","Content-Disposition":"inline","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":3673326,"web_url":"http://patchwork.ozlabs.org/comment/3673326/","msgid":"<852c67c9-325e-46b4-aa0a-7e47da9a399c@redhat.com>","list_archive_url":null,"date":"2026-04-03T21:37:10","subject":"Re: [PATCH] c++: Fix up reflect_constant_{array,string}2.C for\n installed testing [PR124621]","submitter":{"id":4337,"url":"http://patchwork.ozlabs.org/api/people/4337/","name":"Jason Merrill","email":"jason@redhat.com"},"content":"On 3/25/26 7:00 AM, Jakub Jelinek wrote:\n> Hi!\n> \n> These two tests behave differently when using in-tree testing vs.\n> out-of-tree testing.\n> In the former case, libstdc++-v3/scripts/testsuite_flags uses\n> -nostdinc++ -I.../libstdc++-v3/include/x86_64-pc-linux-gnu etc.,\n> so the libstdc++ headers aren't considered system headers, while\n> with out-of-tree testing they are.\n> And the aka printing uses user_facing_original_type_p which depends on\n> /* Look through any typedef in \"user\" code. */\n> if (!DECL_IN_SYSTEM_HEADER (decl) && !DECL_IS_UNDECLARED_BUILTIN (decl))\n> return true;\n> and so behaves differently (and arguably in this case the non-system headers\n> output is nicer).\n\nIt definitely is. I think this demonstrates that strip_typedefs needs \nto look further through a chain of typedefs to see if the actual \nunderlying type is user-facing rather than get hung up on an \nintermediate typedef.\n\n> Anyway, the following patch adjusts the tests so that they accept both\n> forms.\n> \n> Tested on x86_64-linux in-tree and Torbjorn has tested it in arm-none-eabi\n> out-of-tree testing. Ok for trunk?\n> \n> 2026-03-25 Jakub Jelinek \n> \n> \tPR testsuite/124621\n> \t* g++.dg/reflect/reflect_constant_array2.C: Allow different aka\n> \targument in diagnostics for in-tree vs. out-of-tree testing.\n> \t* g++.dg/reflect/reflect_constant_string2.C: Likewise.\n> \n> --- gcc/testsuite/g++.dg/reflect/reflect_constant_array2.C.jj\t2026-01-15 16:33:47.014097840 +0100\n> +++ gcc/testsuite/g++.dg/reflect/reflect_constant_array2.C\t2026-03-25 11:27:34.568796335 +0100\n> @@ -10,8 +10,8 @@ using namespace std::meta;\n> \n> struct A { int a, b; mutable int c; };\n> constexpr auto a = reflect_constant_array (std::vector { A { 1, 2, 3 } });\n> -// { dg-error \"'reflect_constant_array' argument with 'std::ranges::range_value_t >' \\\\\\{aka 'A'\\\\\\} which is not a structural type\" \"\" { target *-*-* } .-1 }\n> +// { dg-error \"'reflect_constant_array' argument with 'std::ranges::range_value_t >' \\\\\\{aka '(A|std::iter_value_t<__gnu_cxx::__normal_iterator > >)'\\\\\\} which is not a structural type\" \"\" { target *-*-* } .-1 }\n> struct B { constexpr B (int x, int y) : a (x), b (y) {} constexpr ~B () {} B (const B &) = delete; int a, b; };\n> constexpr B b[2] = { { 1, 2 }, { 2, 3 } };\n> constexpr auto c = reflect_constant_array (b);\n> -// { dg-error \"'reflect_constant_array' argument with 'std::ranges::range_value_t' \\\\\\{aka 'B'\\\\\\} which is not copy constructible\" \"\" { target *-*-* } .-1 }\n> +// { dg-error \"'reflect_constant_array' argument with 'std::ranges::range_value_t' \\\\\\{aka '(B|std::iter_value_t)'\\\\\\} which is not copy constructible\" \"\" { target *-*-* } .-1 }\n> --- gcc/testsuite/g++.dg/reflect/reflect_constant_string2.C.jj\t2026-01-15 16:33:47.015097823 +0100\n> +++ gcc/testsuite/g++.dg/reflect/reflect_constant_string2.C\t2026-03-25 11:28:21.181009946 +0100\n> @@ -11,4 +11,4 @@ using namespace std::meta;\n> struct V { int a, b, c; };\n> constexpr auto a = reflect_constant_string (std::vector { 42, 43, 44 });\t// { dg-error \"'reflect_constant_string' called with 'std::ranges::range_value_t >' \\\\\\{aka 'int'\\\\\\} rather than 'char', 'wchar_t', 'char8_t', 'char16_t' or 'char32_t'\" }\n> constexpr auto b = reflect_constant_string (std::vector {});\t\t// { dg-error \"'reflect_constant_string' called with 'std::ranges::range_value_t >' \\\\\\{aka 'float'\\\\\\} rather than 'char', 'wchar_t', 'char8_t', 'char16_t' or 'char32_t'\" }\n> -constexpr auto c = reflect_constant_string (std::vector { V { 1, 2, 3 } });\t// { dg-error \"'reflect_constant_string' called with 'std::ranges::range_value_t >' \\\\\\{aka 'V'\\\\\\} rather than 'char', 'wchar_t', 'char8_t', 'char16_t' or 'char32_t'\" }\n> +constexpr auto c = reflect_constant_string (std::vector { V { 1, 2, 3 } });\t// { dg-error \"'reflect_constant_string' called with 'std::ranges::range_value_t >' \\\\\\{aka '(V|std::iter_value_t<__gnu_cxx::__normal_iterator > >)'\\\\\\} rather than 'char', 'wchar_t', 'char8_t', 'char16_t' or 'char32_t'\" }\n> \n> \tJakub\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=akO1aryH;\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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