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Implement std::is_aggregate.

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* include/std/type_traits (is_aggregate, is_aggregate_v): New.
* testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc:
New.
* testsuite/20_util/is_aggregate/requirements/typedefs.cc: Likewise.
* testsuite/20_util/is_aggregate/value.cc: Likewise.

From-SVN: r246651
This commit is contained in:
Ville Voutilainen 2017-04-03 18:57:06 +03:00 • committed by Ville Voutilainen
parent fff80893ba
commit e2ac6765db
5 changed files with 186 additions and 0 deletions
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9
libstdc++-v3/ChangeLog
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@ -1,3 +1,12 @@
2017-04-03 Ville Voutilainen <ville.voutilainen@gmail.com>
Implement std::is_aggregate.
* include/std/type_traits (is_aggregate, is_aggregate_v): New.
* testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc:
New.
* testsuite/20_util/is_aggregate/requirements/typedefs.cc: Likewise.
* testsuite/20_util/is_aggregate/value.cc: Likewise.
2017-03-29 Ville Voutilainen <ville.voutilainen@gmail.com>
Adjust optional's pretty printer for LWG 2900.

20
libstdc++-v3/include/std/type_traits
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@ -3062,6 +3062,26 @@ template <typename _From, typename _To>
#endif
#undef _GLIBCXX_NO_BUILTIN_HAS_UNIQ_OBJ_REP
#ifdef __has_builtin
# if !__has_builtin(__is_aggregate)
// Try not to break non-GNU compilers that don't support the built-in:
# define _GLIBCXX_NO_BUILTIN_IS_AGGREGATE 1
# endif
#endif
#ifndef _GLIBCXX_NO_BUILTIN_IS_AGGREGATE
#define __cpp_lib_is_aggregate 201703
/// is_aggregate
template<typename _Tp>
struct is_aggregate
: bool_constant<__is_aggregate(remove_cv_t<_Tp>)> { };
/// is_aggregate_v
template<typename _Tp>
inline constexpr bool is_aggregate_v = is_aggregate<_Tp>::value;
#endif
#undef _GLIBCXX_NO_BUILTIN_IS_AGGREGATE
#endif // C++17
_GLIBCXX_END_NAMESPACE_VERSION

29
libstdc++-v3/testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc Normal file
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@ -0,0 +1,29 @@
// { dg-options "-std=gnu++1z" }
// { dg-do compile { target c++1z } }
// 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/>.
// NB: This file is for testing type_traits with NO OTHER INCLUDES.
#include <type_traits>
namespace std
{
typedef short test_type;
template struct is_aggregate<test_type>;
}

32
libstdc++-v3/testsuite/20_util/is_aggregate/requirements/typedefs.cc Normal file
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@ -0,0 +1,32 @@
// { dg-options "-std=gnu++1z" }
// { dg-do compile { target c++1z } }
// 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/>.
// NB: This file is for testing type_traits with NO OTHER INCLUDES.
#include <type_traits>
void test01()
{
// Check for required typedefs
typedef std::is_aggregate<int> test_type;
static_assert( std::is_same<test_type::value_type, bool>::value );
typedef std::integral_constant<bool, test_type{}()> bool_type;
static_assert( std::is_same<test_type::type, bool_type>::value );
}

96
libstdc++-v3/testsuite/20_util/is_aggregate/value.cc Normal file
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@ -0,0 +1,96 @@
// { dg-options "-std=gnu++1z" }
// { dg-do compile { target c++1z } }
// 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/>.
#include <type_traits>
#include <testsuite_tr1.h>
#include <tuple>
template <class... T> void pos()
{
static_assert((std::is_aggregate_v<T> &&...));
}
template <class... T> void neg()
{
static_assert((!std::is_aggregate_v<T> &&...));
}
void test01()
{
using namespace __gnu_test;
using __gnu_test::test_category;
using std::is_aggregate;
// Positive tests.
static_assert(test_category<is_aggregate,
ClassType>(true), "");
static_assert(test_category<is_aggregate,
UnionType>(true), "");
static_assert(test_category<is_aggregate,
SLType>(true), "");
static_assert(test_category<is_aggregate,
NoexceptMoveAssignClass>(true), "");
static_assert(test_category<is_aggregate,
unsigned[3]>(true), "");
static_assert(test_category<is_aggregate,
unsigned[3][2]>(true), "");
static_assert(test_category<is_aggregate,
unsigned[]>(true), "");
static_assert(test_category<is_aggregate,
unsigned[][2]>(true), "");
static_assert(test_category<is_aggregate,
EnumType[3]>(true), "");
static_assert(test_category<is_aggregate,
EnumType[3][2]>(true), "");
static_assert(test_category<is_aggregate,
EnumType[]>(true), "");
static_assert(test_category<is_aggregate,
EnumType[][2]>(true), "");
pos<ClassType, UnionType, SLType, NoexceptMoveAssignClass,
unsigned[3], unsigned[3][2], unsigned[], unsigned[][3]>();
// Negative tests.
static_assert(test_category<is_aggregate,
AbstractClass>(false), "");
static_assert(test_category<is_aggregate,
PolymorphicClass>(false), "");
static_assert(test_category<is_aggregate,
ExplicitClass>(false), "");
static_assert(test_category<is_aggregate,
char>(false), "");
static_assert(test_category<is_aggregate,
unsigned char>(false), "");
static_assert(test_category<is_aggregate,
signed char>(false), "");
static_assert(test_category<is_aggregate,
unsigned>(false), "");
static_assert(test_category<is_aggregate,
bool>(false), "");
static_assert(test_category<is_aggregate,
float>(false), "");
static_assert(test_category<is_aggregate,
double>(false), "");
static_assert(test_category<is_aggregate,
EnumType>(false), "");
static_assert(test_category<is_aggregate,
void>(false), "");
neg<AbstractClass, PolymorphicClass, ExplicitClass, char, unsigned,
bool, float, double, void>();
}