From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2181) id AC616385840B; Tue, 5 Oct 2021 15:48:12 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AC616385840B MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Jonathan Wakely To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r12-4194] libstdc++: Ensure std::span and std::string_view are trivially copyable (P2251R1) X-Act-Checkin: gcc X-Git-Author: Jonathan Wakely X-Git-Refname: refs/heads/master X-Git-Oldrev: 370374c4d91d83fb69d4b70dd4e48103114a903d X-Git-Newrev: 1f51e9af7b615838424214e6aaea0de793cb10fe Message-Id: <20211005154812.AC616385840B@sourceware.org> Date: Tue, 5 Oct 2021 15:48:12 +0000 (GMT) X-BeenThere: libstdc++-cvs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Oct 2021 15:48:12 -0000 https://gcc.gnu.org/g:1f51e9af7b615838424214e6aaea0de793cb10fe commit r12-4194-g1f51e9af7b615838424214e6aaea0de793cb10fe Author: Jonathan Wakely Date: Tue Oct 5 16:38:42 2021 +0100 libstdc++: Ensure std::span and std::string_view are trivially copyable (P2251R1) The recently approved P2251R1 paper requires these types to be trivially copyable. They always have been in libstdc++, but add tests to check it. libstdc++-v3/ChangeLog: * testsuite/21_strings/basic_string_view/requirements/trivially_copyable.cc: New test. * testsuite/23_containers/span/trivially_copyable.cc: New test. Diff: --- .../basic_string_view/requirements/trivially_copyable.cc | 11 +++++++++++ .../testsuite/23_containers/span/trivially_copyable.cc | 13 +++++++++++++ 2 files changed, 24 insertions(+) diff --git a/libstdc++-v3/testsuite/21_strings/basic_string_view/requirements/trivially_copyable.cc b/libstdc++-v3/testsuite/21_strings/basic_string_view/requirements/trivially_copyable.cc new file mode 100644 index 00000000000..3f2589c61d8 --- /dev/null +++ b/libstdc++-v3/testsuite/21_strings/basic_string_view/requirements/trivially_copyable.cc @@ -0,0 +1,11 @@ +// { dg-do compile { target c++17 } } + +// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2251r1.pdf + +#include + +static_assert( std::is_trivially_copyable_v ); +static_assert( std::is_trivially_copyable_v ); + +struct traits : std::char_traits { }; +static_assert( std::is_trivially_copyable_v> ); diff --git a/libstdc++-v3/testsuite/23_containers/span/trivially_copyable.cc b/libstdc++-v3/testsuite/23_containers/span/trivially_copyable.cc new file mode 100644 index 00000000000..e3748293555 --- /dev/null +++ b/libstdc++-v3/testsuite/23_containers/span/trivially_copyable.cc @@ -0,0 +1,13 @@ +// { dg-options "-std=gnu++20" } +// { dg-do compile { target c++20 } } + +// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2251r1.pdf + +#include + +static_assert( std::is_trivially_copyable_v> ); +static_assert( std::is_trivially_copyable_v> ); + +struct NonTrivial { NonTrivial(); NonTrivial(const NonTrivial&); }; +static_assert( std::is_trivially_copyable_v> ); +static_assert( std::is_trivially_copyable_v> );