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author | Jonathan Wakely <jwakely@redhat.com> | 2017-11-03 15:45:49 +0000 |
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committer | Jonathan Wakely <redi@gcc.gnu.org> | 2017-11-03 15:45:49 +0000 |
commit | e641ee437f4134131e1d81a5f0e9415f3737d78b (patch) | |
tree | a528bace3e73b9a42fc7f35257ed9d873b74d9ca /libstdc++-v3 | |
parent | d04814543c93d33e52a33ba50cfc5f474ae7b0a3 (diff) | |
download | gcc-e641ee437f4134131e1d81a5f0e9415f3737d78b.zip gcc-e641ee437f4134131e1d81a5f0e9415f3737d78b.tar.gz gcc-e641ee437f4134131e1d81a5f0e9415f3737d78b.tar.bz2 |
Define std::endian for C++2a (P0463R1)
* include/std/type_traits (endian): Define new enumeration type.
* testsuite/20_util/endian/1.cc: New test.
From-SVN: r254381
Diffstat (limited to 'libstdc++-v3')
-rw-r--r-- | libstdc++-v3/ChangeLog | 3 | ||||
-rw-r--r-- | libstdc++-v3/include/std/type_traits | 14 | ||||
-rw-r--r-- | libstdc++-v3/testsuite/20_util/endian/1.cc | 36 |
3 files changed, 51 insertions, 2 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 8cf1818..b12fa76 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,5 +1,8 @@ 2017-11-03 Jonathan Wakely <jwakely@redhat.com> + * include/std/type_traits (endian): Define new enumeration type. + * testsuite/20_util/endian/1.cc: New test. + * include/bits/node_handle.h (_Node_insert_return::get): Remove, as per P0508R0. diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 036f766..7eca08c 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -2664,7 +2664,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION void operator=(__nonesuch const&) = delete; }; -#if __cplusplus > 201402L +#if __cplusplus >= 201703L # define __cpp_lib_is_invocable 201703 /// std::invoke_result @@ -2739,7 +2739,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION = is_nothrow_invocable_r<_Fn, _Args...>::value; #endif // C++17 -#if __cplusplus > 201402L +#if __cplusplus >= 201703L # define __cpp_lib_type_trait_variable_templates 201510L template <typename _Tp> inline constexpr bool is_void_v = is_void<_Tp>::value; @@ -2943,6 +2943,16 @@ template <typename _From, typename _To> #endif // C++17 +#if __cplusplus > 201703L + /// Byte order + enum class endian + { + little = __ORDER_LITTLE_ENDIAN__, + big = __ORDER_BIG_ENDIAN__, + native = __BYTE_ORDER__ + }; +#endif // C++2a + _GLIBCXX_END_NAMESPACE_VERSION } // namespace std diff --git a/libstdc++-v3/testsuite/20_util/endian/1.cc b/libstdc++-v3/testsuite/20_util/endian/1.cc new file mode 100644 index 0000000..2720c5e --- /dev/null +++ b/libstdc++-v3/testsuite/20_util/endian/1.cc @@ -0,0 +1,36 @@ +// Copyright (C) 2017 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING3. If not see +// <http://www.gnu.org/licenses/>. + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include <type_traits> + +static_assert( std::is_enum_v<std::endian> ); +static_assert( std::endian::little != std::endian::big ); +static_assert( std::endian::native == std::endian::big + || std::endian::native == std::endian::little ); + +namespace gnu { + int little, big, native; +} + +using namespace std; +using namespace gnu; + +// std::endian is a scoped-enum so these should refer to gnu::native etc. +int test = little + big + native; |