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// C++11 -*- C++ -*- |
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// Copyright (C) 2007-2013 Free Software Foundation, Inc. |
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// |
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// This file is part of the GNU ISO C++ Library. This library is free |
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// software; you can redistribute it and/or modify it under the |
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// terms of the GNU General Public License as published by the |
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// Free Software Foundation; either version 3, or (at your option) |
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// any later version. |
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// This library is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// . |
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/** @file include/type_traits |
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* This is a Standard C++ Library header. |
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*/ |
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#ifndef _GLIBCXX_TYPE_TRAITS |
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#define _GLIBCXX_TYPE_TRAITS 1 |
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#pragma GCC system_header |
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#if __cplusplus < 201103L |
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# include |
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#else |
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#include |
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namespace std _GLIBCXX_VISIBILITY(default) |
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{ |
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_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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/** |
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* @defgroup metaprogramming Metaprogramming |
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* @ingroup utilities |
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* |
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* Template utilities for compile-time introspection and modification, |
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* including type classification traits, type property inspection traits |
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* and type transformation traits. |
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* |
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* @{ |
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*/ |
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/// integral_constant |
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template |
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struct integral_constant |
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{ |
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static constexpr _Tp value = __v; |
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typedef _Tp value_type; |
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typedef integral_constant<_Tp, __v> type; |
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constexpr operator value_type() { return value; } |
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}; |
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template |
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constexpr _Tp integral_constant<_Tp, __v>::value; |
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/// The type used as a compile-time boolean with true value. |
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typedef integral_constant true_type; |
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/// The type used as a compile-time boolean with false value. |
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typedef integral_constant false_type; |
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// Meta programming helper types. |
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template |
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struct conditional; |
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template |
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struct __or_; |
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template<> |
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struct __or_<> |
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: public false_type |
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{ }; |
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template |
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struct __or_<_B1> |
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: public _B1 |
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{ }; |
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template |
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struct __or_<_B1, _B2> |
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: public conditional<_B1::value, _B1, _B2>::type |
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{ }; |
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template |
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struct __or_<_B1, _B2, _B3, _Bn...> |
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: public conditional<_B1::value, _B1, __or_<_B2, _B3, _Bn...>>::type |
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{ }; |
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template |
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struct __and_; |
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template<> |
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struct __and_<> |
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: public true_type |
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{ }; |
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template |
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struct __and_<_B1> |
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: public _B1 |
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{ }; |
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template |
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struct __and_<_B1, _B2> |
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: public conditional<_B1::value, _B2, _B1>::type |
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{ }; |
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template |
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struct __and_<_B1, _B2, _B3, _Bn...> |
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: public conditional<_B1::value, __and_<_B2, _B3, _Bn...>, _B1>::type |
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{ }; |
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template |
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struct __not_ |
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: public integral_constant |
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{ }; |
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struct __sfinae_types |
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{ |
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typedef char __one; |
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typedef struct { char __arr[2]; } __two; |
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}; |
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// For several sfinae-friendly trait implementations we transport both the |
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// result information (as the member type) and the failure information (no |
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// member type). This is very similar to std::enable_if, but we cannot use |
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// them, because we need to derive from them as an implementation detail. |
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template |
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struct __success_type |
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{ typedef _Tp type; }; |
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struct __failure_type |
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{ }; |
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// Primary type categories. |
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template |
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struct remove_cv; |
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template |
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struct __is_void_helper |
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: public false_type { }; |
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template<> |
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struct __is_void_helper |
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: public true_type { }; |
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/// is_void |
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template |
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struct is_void |
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: public integral_constant |
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remove_cv<_Tp>::type>::value)> |
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{ }; |
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template |
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struct __is_integral_helper |
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: public false_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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#ifdef _GLIBCXX_USE_WCHAR_T |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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#endif |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128) |
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template<> |
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struct __is_integral_helper<__int128> |
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: public true_type { }; |
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template<> |
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struct __is_integral_helper |
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: public true_type { }; |
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#endif |
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/// is_integral |
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template |
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struct is_integral |
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: public integral_constant |
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remove_cv<_Tp>::type>::value)> |
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{ }; |
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template |
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struct __is_floating_point_helper |
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: public false_type { }; |
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template<> |
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struct __is_floating_point_helper |
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: public true_type { }; |
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template<> |
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struct __is_floating_point_helper |
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: public true_type { }; |
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template<> |
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struct __is_floating_point_helper |
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: public true_type { }; |
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#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) |
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template<> |
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struct __is_floating_point_helper<__float128> |
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: public true_type { }; |
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#endif |
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/// is_floating_point |
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template |
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struct is_floating_point |
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: public integral_constant |
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remove_cv<_Tp>::type>::value)> |
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{ }; |
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/// is_array |
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template |
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struct is_array |
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: public false_type { }; |
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template |
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struct is_array<_Tp[_Size]> |
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: public true_type { }; |
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template |
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struct is_array<_Tp[]> |
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: public true_type { }; |
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template |
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struct __is_pointer_helper |
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: public false_type { }; |
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template |
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struct __is_pointer_helper<_Tp*> |
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: public true_type { }; |
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/// is_pointer |
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template |
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struct is_pointer |
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: public integral_constant |
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remove_cv<_Tp>::type>::value)> |
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{ }; |
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/// is_lvalue_reference |
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template |
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struct is_lvalue_reference |
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: public false_type { }; |
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template |
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struct is_lvalue_reference<_Tp&> |
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: public true_type { }; |
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/// is_rvalue_reference |
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template |
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struct is_rvalue_reference |
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: public false_type { }; |
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template |
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struct is_rvalue_reference<_Tp&&> |
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: public true_type { }; |
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template |
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struct is_function; |
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template |
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struct __is_member_object_pointer_helper |
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: public false_type { }; |
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template |
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struct __is_member_object_pointer_helper<_Tp _Cp::*> |
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: public integral_constant::value> { }; |
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/// is_member_object_pointer |
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template |
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struct is_member_object_pointer |
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: public integral_constant |
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typename remove_cv<_Tp>::type>::value)> |
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{ }; |
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template |
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struct __is_member_function_pointer_helper |
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: public false_type { }; |
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template |
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struct __is_member_function_pointer_helper<_Tp _Cp::*> |
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: public integral_constant::value> { }; |
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/// is_member_function_pointer |
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template |
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struct is_member_function_pointer |
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: public integral_constant |
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typename remove_cv<_Tp>::type>::value)> |
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{ }; |
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/// is_enum |
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template |
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struct is_enum |
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: public integral_constant |
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{ }; |
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/// is_union |
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template |
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struct is_union |
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: public integral_constant |
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{ }; |
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/// is_class |
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template |
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struct is_class |
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: public integral_constant |
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{ }; |
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/// is_function |
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template |
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struct is_function |
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: public false_type { }; |
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template |
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struct is_function<_Res(_ArgTypes...)> |
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: public true_type { }; |
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template |
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struct is_function<_Res(_ArgTypes......)> |
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: public true_type { }; |
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template |
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struct is_function<_Res(_ArgTypes...) const> |
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: public true_type { }; |
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template |
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struct is_function<_Res(_ArgTypes......) const> |
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: public true_type { }; |
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template |
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struct is_function<_Res(_ArgTypes...) volatile> |
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: public true_type { }; |
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template |
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struct is_function<_Res(_ArgTypes......) volatile> |
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: public true_type { }; |
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template |
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struct is_function<_Res(_ArgTypes...) const volatile> |
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: public true_type { }; |
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template |
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struct is_function<_Res(_ArgTypes......) const volatile> |
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: public true_type { }; |
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template |
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struct __is_nullptr_t_helper |
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: public false_type { }; |
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template<> |
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struct __is_nullptr_t_helper |
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: public true_type { }; |
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// __is_nullptr_t (extension). |
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template |
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struct __is_nullptr_t |
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: public integral_constant |
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remove_cv<_Tp>::type>::value)> |
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{ }; |
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// Composite type categories. |
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430 |
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/// is_reference |
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432 |
template |
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struct is_reference |
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: public __or_, |
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is_rvalue_reference<_Tp>>::type |
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{ }; |
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/// is_arithmetic |
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template |
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struct is_arithmetic |
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: public __or_, is_floating_point<_Tp>>::type |
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{ }; |
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443 |
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/// is_fundamental |
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template |
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446 |
struct is_fundamental |
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447 |
: public __or_, is_void<_Tp>, __is_nullptr_t<_Tp>>::type |
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{ }; |
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449 |
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/// is_object |
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451 |
template |
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452 |
struct is_object |
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453 |
: public __not_<__or_, is_reference<_Tp>, |
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454 |
is_void<_Tp>>>::type |
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455 |
{ }; |
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456 |
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457 |
template |
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|
458 |
struct is_member_pointer; |
|
|
459 |
|
|
|
460 |
/// is_scalar |
|
|
461 |
template |
|
|
462 |
struct is_scalar |
|
|
463 |
: public __or_, is_enum<_Tp>, is_pointer<_Tp>, |
|
|
464 |
is_member_pointer<_Tp>, __is_nullptr_t<_Tp>>::type |
|
|
465 |
{ }; |
|
|
466 |
|
|
|
467 |
/// is_compound |
|
|
468 |
template |
|
|
469 |
struct is_compound |
|
|
470 |
: public integral_constant::value> { }; |
|
|
471 |
|
|
|
472 |
template |
|
|
473 |
struct __is_member_pointer_helper |
|
|
474 |
: public false_type { }; |
|
|
475 |
|
|
|
476 |
template |
|
|
477 |
struct __is_member_pointer_helper<_Tp _Cp::*> |
|
|
478 |
: public true_type { }; |
|
|
479 |
|
|
|
480 |
/// is_member_pointer |
|
|
481 |
template |
|
|
482 |
struct is_member_pointer |
|
|
483 |
: public integral_constant |
|
|
484 |
typename remove_cv<_Tp>::type>::value)> |
|
|
485 |
{ }; |
|
|
486 |
|
|
|
487 |
// Type properties. |
|
|
488 |
|
|
|
489 |
/// is_const |
|
|
490 |
template |
|
|
491 |
struct is_const |
|
|
492 |
: public false_type { }; |
|
|
493 |
|
|
|
494 |
template |
|
|
495 |
struct is_const<_Tp const> |
|
|
496 |
: public true_type { }; |
|
|
497 |
|
|
|
498 |
/// is_volatile |
|
|
499 |
template |
|
|
500 |
struct is_volatile |
|
|
501 |
: public false_type { }; |
|
|
502 |
|
|
|
503 |
template |
|
|
504 |
struct is_volatile<_Tp volatile> |
|
|
505 |
: public true_type { }; |
|
|
506 |
|
|
|
507 |
/// is_trivial |
|
|
508 |
template |
|
|
509 |
struct is_trivial |
|
|
510 |
: public integral_constant |
|
|
511 |
{ }; |
|
|
512 |
|
|
|
513 |
// is_trivially_copyable (still unimplemented) |
|
|
514 |
|
|
|
515 |
/// is_standard_layout |
|
|
516 |
template |
|
|
517 |
struct is_standard_layout |
|
|
518 |
: public integral_constant |
|
|
519 |
{ }; |
|
|
520 |
|
|
|
521 |
/// is_pod |
|
|
522 |
// Could use is_standard_layout && is_trivial instead of the builtin. |
|
|
523 |
template |
|
|
524 |
struct is_pod |
|
|
525 |
: public integral_constant |
|
|
526 |
{ }; |
|
|
527 |
|
|
|
528 |
/// is_literal_type |
|
|
529 |
template |
|
|
530 |
struct is_literal_type |
|
|
531 |
: public integral_constant |
|
|
532 |
{ }; |
|
|
533 |
|
|
|
534 |
/// is_empty |
|
|
535 |
template |
|
|
536 |
struct is_empty |
|
|
537 |
: public integral_constant |
|
|
538 |
{ }; |
|
|
539 |
|
|
|
540 |
/// is_polymorphic |
|
|
541 |
template |
|
|
542 |
struct is_polymorphic |
|
|
543 |
: public integral_constant |
|
|
544 |
{ }; |
|
|
545 |
|
|
|
546 |
/// is_abstract |
|
|
547 |
template |
|
|
548 |
struct is_abstract |
|
|
549 |
: public integral_constant |
|
|
550 |
{ }; |
|
|
551 |
|
|
|
552 |
template |
|
|
553 |
bool = is_integral<_Tp>::value, |
|
|
554 |
bool = is_floating_point<_Tp>::value> |
|
|
555 |
struct __is_signed_helper |
|
|
556 |
: public false_type { }; |
|
|
557 |
|
|
|
558 |
template |
|
|
559 |
struct __is_signed_helper<_Tp, false, true> |
|
|
560 |
: public true_type { }; |
|
|
561 |
|
|
|
562 |
template |
|
|
563 |
struct __is_signed_helper<_Tp, true, false> |
|
|
564 |
: public integral_constant(_Tp(-1) < _Tp(0))> |
|
|
565 |
{ }; |
|
|
566 |
|
|
|
567 |
/// is_signed |
|
|
568 |
template |
|
|
569 |
struct is_signed |
|
|
570 |
: public integral_constant::value> |
|
|
571 |
{ }; |
|
|
572 |
|
|
|
573 |
/// is_unsigned |
|
|
574 |
template |
|
|
575 |
struct is_unsigned |
|
|
576 |
: public __and_, __not_>>::type |
|
|
577 |
{ }; |
|
|
578 |
|
|
|
579 |
|
|
|
580 |
// Destructible and constructible type properties. |
|
|
581 |
|
|
|
582 |
template |
|
|
583 |
struct add_rvalue_reference; |
|
|
584 |
|
|
|
585 |
/** |
|
|
586 |
* @brief Utility to simplify expressions used in unevaluated operands |
|
|
587 |
* @ingroup utilities |
|
|
588 |
*/ |
|
|
589 |
template |
|
|
590 |
typename add_rvalue_reference<_Tp>::type declval() noexcept; |
|
|
591 |
|
|
|
592 |
template |
|
|
593 |
struct extent; |
|
|
594 |
|
|
|
595 |
template |
|
|
596 |
struct remove_all_extents; |
|
|
597 |
|
|
|
598 |
template |
|
|
599 |
struct __is_array_known_bounds |
|
|
600 |
: public integral_constant::value > 0)> |
|
|
601 |
{ }; |
|
|
602 |
|
|
|
603 |
template |
|
|
604 |
struct __is_array_unknown_bounds |
|
|
605 |
: public __and_, __not_>>::type |
|
|
606 |
{ }; |
|
|
607 |
|
|
|
608 |
// In N3290 is_destructible does not say anything about function |
|
|
609 |
// types and abstract types, see LWG 2049. This implementation |
|
|
610 |
// describes function types as non-destructible and all complete |
|
|
611 |
// object types as destructible, iff the explicit destructor |
|
|
612 |
// call expression is wellformed. |
|
|
613 |
struct __do_is_destructible_impl |
|
|
614 |
{ |
|
|
615 |
template().~_Tp())> |
|
|
616 |
static true_type __test(int); |
|
|
617 |
|
|
|
618 |
template |
|
|
619 |
static false_type __test(...); |
|
|
620 |
}; |
|
|
621 |
|
|
|
622 |
template |
|
|
623 |
struct __is_destructible_impl |
|
|
624 |
: public __do_is_destructible_impl |
|
|
625 |
{ |
|
|
626 |
typedef decltype(__test<_Tp>(0)) type; |
|
|
627 |
}; |
|
|
628 |
|
|
|
629 |
template |
|
|
630 |
bool = __or_, |
|
|
631 |
__is_array_unknown_bounds<_Tp>, |
|
|
632 |
is_function<_Tp>>::value, |
|
|
633 |
bool = __or_, is_scalar<_Tp>>::value> |
|
|
634 |
struct __is_destructible_safe; |
|
|
635 |
|
|
|
636 |
template |
|
|
637 |
struct __is_destructible_safe<_Tp, false, false> |
|
|
638 |
: public __is_destructible_impl |
|
|
639 |
remove_all_extents<_Tp>::type>::type |
|
|
640 |
{ }; |
|
|
641 |
|
|
|
642 |
template |
|
|
643 |
struct __is_destructible_safe<_Tp, true, false> |
|
|
644 |
: public false_type { }; |
|
|
645 |
|
|
|
646 |
template |
|
|
647 |
struct __is_destructible_safe<_Tp, false, true> |
|
|
648 |
: public true_type { }; |
|
|
649 |
|
|
|
650 |
/// is_destructible |
|
|
651 |
template |
|
|
652 |
struct is_destructible |
|
|
653 |
: public integral_constant::value)> |
|
|
654 |
{ }; |
|
|
655 |
|
|
|
656 |
// is_nothrow_destructible requires that is_destructible is |
|
|
657 |
// satisfied as well. We realize that by mimicing the |
|
|
658 |
// implementation of is_destructible but refer to noexcept(expr) |
|
|
659 |
// instead of decltype(expr). |
|
|
660 |
struct __do_is_nt_destructible_impl |
|
|
661 |
{ |
|
|
662 |
template |
|
|
663 |
static integral_constant().~_Tp())> |
|
|
664 |
__test(int); |
|
|
665 |
|
|
|
666 |
template |
|
|
667 |
static false_type __test(...); |
|
|
668 |
}; |
|
|
669 |
|
|
|
670 |
template |
|
|
671 |
struct __is_nt_destructible_impl |
|
|
672 |
: public __do_is_nt_destructible_impl |
|
|
673 |
{ |
|
|
674 |
typedef decltype(__test<_Tp>(0)) type; |
|
|
675 |
}; |
|
|
676 |
|
|
|
677 |
template |
|
|
678 |
bool = __or_, |
|
|
679 |
__is_array_unknown_bounds<_Tp>, |
|
|
680 |
is_function<_Tp>>::value, |
|
|
681 |
bool = __or_, is_scalar<_Tp>>::value> |
|
|
682 |
struct __is_nt_destructible_safe; |
|
|
683 |
|
|
|
684 |
template |
|
|
685 |
struct __is_nt_destructible_safe<_Tp, false, false> |
|
|
686 |
: public __is_nt_destructible_impl |
|
|
687 |
remove_all_extents<_Tp>::type>::type |
|
|
688 |
{ }; |
|
|
689 |
|
|
|
690 |
template |
|
|
691 |
struct __is_nt_destructible_safe<_Tp, true, false> |
|
|
692 |
: public false_type { }; |
|
|
693 |
|
|
|
694 |
template |
|
|
695 |
struct __is_nt_destructible_safe<_Tp, false, true> |
|
|
696 |
: public true_type { }; |
|
|
697 |
|
|
|
698 |
/// is_nothrow_destructible |
|
|
699 |
template |
|
|
700 |
struct is_nothrow_destructible |
|
|
701 |
: public integral_constant::value)> |
|
|
702 |
{ }; |
|
|
703 |
|
|
|
704 |
struct __do_is_default_constructible_impl |
|
|
705 |
{ |
|
|
706 |
template |
|
|
707 |
static true_type __test(int); |
|
|
708 |
|
|
|
709 |
template |
|
|
710 |
static false_type __test(...); |
|
|
711 |
}; |
|
|
712 |
|
|
|
713 |
template |
|
|
714 |
struct __is_default_constructible_impl |
|
|
715 |
: public __do_is_default_constructible_impl |
|
|
716 |
{ |
|
|
717 |
typedef decltype(__test<_Tp>(0)) type; |
|
|
718 |
}; |
|
|
719 |
|
|
|
720 |
template |
|
|
721 |
struct __is_default_constructible_atom |
|
|
722 |
: public __and_<__not_>, |
|
|
723 |
__is_default_constructible_impl<_Tp>>::type |
|
|
724 |
{ }; |
|
|
725 |
|
|
|
726 |
template::value> |
|
|
727 |
struct __is_default_constructible_safe; |
|
|
728 |
|
|
|
729 |
// The following technique is a workaround for a current core language |
|
|
730 |
// restriction, which does not allow for array types to occur in |
|
|
731 |
// functional casts of the form T(). Complete arrays can be default- |
|
|
732 |
// constructed, if the element type is default-constructible, but |
|
|
733 |
// arrays with unknown bounds are not. |
|
|
734 |
template |
|
|
735 |
struct __is_default_constructible_safe<_Tp, true> |
|
|
736 |
: public __and_<__is_array_known_bounds<_Tp>, |
|
|
737 |
__is_default_constructible_atom |
|
|
738 |
remove_all_extents<_Tp>::type>>::type |
|
|
739 |
{ }; |
|
|
740 |
|
|
|
741 |
template |
|
|
742 |
struct __is_default_constructible_safe<_Tp, false> |
|
|
743 |
: public __is_default_constructible_atom<_Tp>::type |
|
|
744 |
{ }; |
|
|
745 |
|
|
|
746 |
/// is_default_constructible |
|
|
747 |
template |
|
|
748 |
struct is_default_constructible |
|
|
749 |
: public integral_constant |
|
|
750 |
_Tp>::value)> |
|
|
751 |
{ }; |
|
|
752 |
|
|
|
753 |
|
|
|
754 |
// Implementation of is_constructible. |
|
|
755 |
|
|
|
756 |
// The hardest part of this trait is the binary direct-initialization |
|
|
757 |
// case, because we hit into a functional cast of the form T(arg). |
|
|
758 |
// This implementation uses different strategies depending on the |
|
|
759 |
// target type to reduce the test overhead as much as possible: |
|
|
760 |
// |
|
|
761 |
// a) For a reference target type, we use a static_cast expression |
|
|
762 |
// modulo its extra cases. |
|
|
763 |
// |
|
|
764 |
// b) For a non-reference target type we use a ::new expression. |
|
|
765 |
struct __do_is_static_castable_impl |
|
|
766 |
{ |
|
|
767 |
template |
|
|
768 |
= decltype(static_cast<_To>(declval<_From>()))> |
|
|
769 |
static true_type __test(int); |
|
|
770 |
|
|
|
771 |
template |
|
|
772 |
static false_type __test(...); |
|
|
773 |
}; |
|
|
774 |
|
|
|
775 |
template |
|
|
776 |
struct __is_static_castable_impl |
|
|
777 |
: public __do_is_static_castable_impl |
|
|
778 |
{ |
|
|
779 |
typedef decltype(__test<_From, _To>(0)) type; |
|
|
780 |
}; |
|
|
781 |
|
|
|
782 |
template |
|
|
783 |
struct __is_static_castable_safe |
|
|
784 |
: public __is_static_castable_impl<_From, _To>::type |
|
|
785 |
{ }; |
|
|
786 |
|
|
|
787 |
// __is_static_castable |
|
|
788 |
template |
|
|
789 |
struct __is_static_castable |
|
|
790 |
: public integral_constant |
|
|
791 |
_From, _To>::value)> |
|
|
792 |
{ }; |
|
|
793 |
|
|
|
794 |
// Implementation for non-reference types. To meet the proper |
|
|
795 |
// variable definition semantics, we also need to test for |
|
|
796 |
// is_destructible in this case. |
|
|
797 |
// This form should be simplified by a single expression: |
|
|
798 |
// ::delete ::new _Tp(declval<_Arg>()), see c++/51222. |
|
|
799 |
struct __do_is_direct_constructible_impl |
|
|
800 |
{ |
|
|
801 |
template |
|
|
802 |
= decltype(::new _Tp(declval<_Arg>()))> |
|
|
803 |
static true_type __test(int); |
|
|
804 |
|
|
|
805 |
template |
|
|
806 |
static false_type __test(...); |
|
|
807 |
}; |
|
|
808 |
|
|
|
809 |
template |
|
|
810 |
struct __is_direct_constructible_impl |
|
|
811 |
: public __do_is_direct_constructible_impl |
|
|
812 |
{ |
|
|
813 |
typedef decltype(__test<_Tp, _Arg>(0)) type; |
|
|
814 |
}; |
|
|
815 |
|
|
|
816 |
template |
|
|
817 |
struct __is_direct_constructible_new_safe |
|
|
818 |
: public __and_, |
|
|
819 |
__is_direct_constructible_impl<_Tp, _Arg>>::type |
|
|
820 |
{ }; |
|
|
821 |
|
|
|
822 |
template |
|
|
823 |
struct is_same; |
|
|
824 |
|
|
|
825 |
template |
|
|
826 |
struct is_base_of; |
|
|
827 |
|
|
|
828 |
template |
|
|
829 |
struct remove_reference; |
|
|
830 |
|
|
|
831 |
template |
|
|
832 |
= __not_<__or_, |
|
|
833 |
is_function<_From>>>::value> |
|
|
834 |
struct __is_base_to_derived_ref; |
|
|
835 |
|
|
|
836 |
// Detect whether we have a downcast situation during |
|
|
837 |
// reference binding. |
|
|
838 |
template |
|
|
839 |
struct __is_base_to_derived_ref<_From, _To, true> |
|
|
840 |
{ |
|
|
841 |
typedef typename remove_cv |
|
|
842 |
>::type>::type __src_t; |
|
|
843 |
typedef typename remove_cv |
|
|
844 |
>::type>::type __dst_t; |
|
|
845 |
typedef __and_<__not_>, |
|
|
846 |
is_base_of<__src_t, __dst_t>> type; |
|
|
847 |
static constexpr bool value = type::value; |
|
|
848 |
}; |
|
|
849 |
|
|
|
850 |
template |
|
|
851 |
struct __is_base_to_derived_ref<_From, _To, false> |
|
|
852 |
: public false_type |
|
|
853 |
{ }; |
|
|
854 |
|
|
|
855 |
template |
|
|
856 |
= __and_, |
|
|
857 |
is_rvalue_reference<_To>>::value> |
|
|
858 |
struct __is_lvalue_to_rvalue_ref; |
|
|
859 |
|
|
|
860 |
// Detect whether we have an lvalue of non-function type |
|
|
861 |
// bound to a reference-compatible rvalue-reference. |
|
|
862 |
template |
|
|
863 |
struct __is_lvalue_to_rvalue_ref<_From, _To, true> |
|
|
864 |
{ |
|
|
865 |
typedef typename remove_cv |
|
|
866 |
_From>::type>::type __src_t; |
|
|
867 |
typedef typename remove_cv |
|
|
868 |
_To>::type>::type __dst_t; |
|
|
869 |
typedef __and_<__not_>, |
|
|
870 |
__or_, |
|
|
871 |
is_base_of<__dst_t, __src_t>>> type; |
|
|
872 |
static constexpr bool value = type::value; |
|
|
873 |
}; |
|
|
874 |
|
|
|
875 |
template |
|
|
876 |
struct __is_lvalue_to_rvalue_ref<_From, _To, false> |
|
|
877 |
: public false_type |
|
|
878 |
{ }; |
|
|
879 |
|
|
|
880 |
// Here we handle direct-initialization to a reference type as |
|
|
881 |
// equivalent to a static_cast modulo overshooting conversions. |
|
|
882 |
// These are restricted to the following conversions: |
|
|
883 |
// a) A base class value to a derived class reference |
|
|
884 |
// b) An lvalue to an rvalue-reference of reference-compatible |
|
|
885 |
// types that are not functions |
|
|
886 |
template |
|
|
887 |
struct __is_direct_constructible_ref_cast |
|
|
888 |
: public __and_<__is_static_castable<_Arg, _Tp>, |
|
|
889 |
__not_<__or_<__is_base_to_derived_ref<_Arg, _Tp>, |
|
|
890 |
__is_lvalue_to_rvalue_ref<_Arg, _Tp> |
|
|
891 |
>>>::type |
|
|
892 |
{ }; |
|
|
893 |
|
|
|
894 |
template |
|
|
895 |
struct __is_direct_constructible_new |
|
|
896 |
: public conditional::value, |
|
|
897 |
__is_direct_constructible_ref_cast<_Tp, _Arg>, |
|
|
898 |
__is_direct_constructible_new_safe<_Tp, _Arg> |
|
|
899 |
>::type |
|
|
900 |
{ }; |
|
|
901 |
|
|
|
902 |
template |
|
|
903 |
struct __is_direct_constructible |
|
|
904 |
: public integral_constant |
|
|
905 |
_Tp, _Arg>::value)> |
|
|
906 |
{ }; |
|
|
907 |
|
|
|
908 |
// Since default-construction and binary direct-initialization have |
|
|
909 |
// been handled separately, the implementation of the remaining |
|
|
910 |
// n-ary construction cases is rather straightforward. We can use |
|
|
911 |
// here a functional cast, because array types are excluded anyway |
|
|
912 |
// and this form is never interpreted as a C cast. |
|
|
913 |
struct __do_is_nary_constructible_impl |
|
|
914 |
{ |
|
|
915 |
template |
|
|
916 |
= decltype(_Tp(declval<_Args>()...))> |
|
|
917 |
static true_type __test(int); |
|
|
918 |
|
|
|
919 |
template |
|
|
920 |
static false_type __test(...); |
|
|
921 |
}; |
|
|
922 |
|
|
|
923 |
template |
|
|
924 |
struct __is_nary_constructible_impl |
|
|
925 |
: public __do_is_nary_constructible_impl |
|
|
926 |
{ |
|
|
927 |
typedef decltype(__test<_Tp, _Args...>(0)) type; |
|
|
928 |
}; |
|
|
929 |
|
|
|
930 |
template |
|
|
931 |
struct __is_nary_constructible |
|
|
932 |
: public __is_nary_constructible_impl<_Tp, _Args...>::type |
|
|
933 |
{ |
|
|
934 |
static_assert(sizeof...(_Args) > 1, |
|
|
935 |
"Only useful for > 1 arguments"); |
|
|
936 |
}; |
|
|
937 |
|
|
|
938 |
template |
|
|
939 |
struct __is_constructible_impl |
|
|
940 |
: public __is_nary_constructible<_Tp, _Args...> |
|
|
941 |
{ }; |
|
|
942 |
|
|
|
943 |
template |
|
|
944 |
struct __is_constructible_impl<_Tp, _Arg> |
|
|
945 |
: public __is_direct_constructible<_Tp, _Arg> |
|
|
946 |
{ }; |
|
|
947 |
|
|
|
948 |
template |
|
|
949 |
struct __is_constructible_impl<_Tp> |
|
|
950 |
: public is_default_constructible<_Tp> |
|
|
951 |
{ }; |
|
|
952 |
|
|
|
953 |
/// is_constructible |
|
|
954 |
template |
|
|
955 |
struct is_constructible |
|
|
956 |
: public integral_constant |
|
|
957 |
_Args...>::value)> |
|
|
958 |
{ }; |
|
|
959 |
|
|
|
960 |
template::value> |
|
|
961 |
struct __is_copy_constructible_impl; |
|
|
962 |
|
|
|
963 |
template |
|
|
964 |
struct __is_copy_constructible_impl<_Tp, true> |
|
|
965 |
: public false_type { }; |
|
|
966 |
|
|
|
967 |
template |
|
|
968 |
struct __is_copy_constructible_impl<_Tp, false> |
|
|
969 |
: public is_constructible<_Tp, const _Tp&> |
|
|
970 |
{ }; |
|
|
971 |
|
|
|
972 |
/// is_copy_constructible |
|
|
973 |
template |
|
|
974 |
struct is_copy_constructible |
|
|
975 |
: public __is_copy_constructible_impl<_Tp> |
|
|
976 |
{ }; |
|
|
977 |
|
|
|
978 |
template::value> |
|
|
979 |
struct __is_move_constructible_impl; |
|
|
980 |
|
|
|
981 |
template |
|
|
982 |
struct __is_move_constructible_impl<_Tp, true> |
|
|
983 |
: public false_type { }; |
|
|
984 |
|
|
|
985 |
template |
|
|
986 |
struct __is_move_constructible_impl<_Tp, false> |
|
|
987 |
: public is_constructible<_Tp, _Tp&&> |
|
|
988 |
{ }; |
|
|
989 |
|
|
|
990 |
/// is_move_constructible |
|
|
991 |
template |
|
|
992 |
struct is_move_constructible |
|
|
993 |
: public __is_move_constructible_impl<_Tp> |
|
|
994 |
{ }; |
|
|
995 |
|
|
|
996 |
template |
|
|
997 |
struct __is_nt_default_constructible_atom |
|
|
998 |
: public integral_constant |
|
|
999 |
{ }; |
|
|
1000 |
|
|
|
1001 |
template::value> |
|
|
1002 |
struct __is_nt_default_constructible_impl; |
|
|
1003 |
|
|
|
1004 |
template |
|
|
1005 |
struct __is_nt_default_constructible_impl<_Tp, true> |
|
|
1006 |
: public __and_<__is_array_known_bounds<_Tp>, |
|
|
1007 |
__is_nt_default_constructible_atom |
|
|
1008 |
remove_all_extents<_Tp>::type>>::type |
|
|
1009 |
{ }; |
|
|
1010 |
|
|
|
1011 |
template |
|
|
1012 |
struct __is_nt_default_constructible_impl<_Tp, false> |
|
|
1013 |
: public __is_nt_default_constructible_atom<_Tp> |
|
|
1014 |
{ }; |
|
|
1015 |
|
|
|
1016 |
/// is_nothrow_default_constructible |
|
|
1017 |
template |
|
|
1018 |
struct is_nothrow_default_constructible |
|
|
1019 |
: public __and_, |
|
|
1020 |
__is_nt_default_constructible_impl<_Tp>>::type |
|
|
1021 |
{ }; |
|
|
1022 |
|
|
|
1023 |
template |
|
|
1024 |
struct __is_nt_constructible_impl |
|
|
1025 |
: public integral_constant()...))> |
|
|
1026 |
{ }; |
|
|
1027 |
|
|
|
1028 |
template |
|
|
1029 |
struct __is_nt_constructible_impl<_Tp, _Arg> |
|
|
1030 |
: public integral_constant |
|
|
1031 |
noexcept(static_cast<_Tp>(declval<_Arg>()))> |
|
|
1032 |
{ }; |
|
|
1033 |
|
|
|
1034 |
template |
|
|
1035 |
struct __is_nt_constructible_impl<_Tp> |
|
|
1036 |
: public is_nothrow_default_constructible<_Tp> |
|
|
1037 |
{ }; |
|
|
1038 |
|
|
|
1039 |
/// is_nothrow_constructible |
|
|
1040 |
template |
|
|
1041 |
struct is_nothrow_constructible |
|
|
1042 |
: public __and_, |
|
|
1043 |
__is_nt_constructible_impl<_Tp, _Args...>>::type |
|
|
1044 |
{ }; |
|
|
1045 |
|
|
|
1046 |
template::value> |
|
|
1047 |
struct __is_nothrow_copy_constructible_impl; |
|
|
1048 |
|
|
|
1049 |
template |
|
|
1050 |
struct __is_nothrow_copy_constructible_impl<_Tp, true> |
|
|
1051 |
: public false_type { }; |
|
|
1052 |
|
|
|
1053 |
template |
|
|
1054 |
struct __is_nothrow_copy_constructible_impl<_Tp, false> |
|
|
1055 |
: public is_nothrow_constructible<_Tp, const _Tp&> |
|
|
1056 |
{ }; |
|
|
1057 |
|
|
|
1058 |
/// is_nothrow_copy_constructible |
|
|
1059 |
template |
|
|
1060 |
struct is_nothrow_copy_constructible |
|
|
1061 |
: public __is_nothrow_copy_constructible_impl<_Tp> |
|
|
1062 |
{ }; |
|
|
1063 |
|
|
|
1064 |
template::value> |
|
|
1065 |
struct __is_nothrow_move_constructible_impl; |
|
|
1066 |
|
|
|
1067 |
template |
|
|
1068 |
struct __is_nothrow_move_constructible_impl<_Tp, true> |
|
|
1069 |
: public false_type { }; |
|
|
1070 |
|
|
|
1071 |
template |
|
|
1072 |
struct __is_nothrow_move_constructible_impl<_Tp, false> |
|
|
1073 |
: public is_nothrow_constructible<_Tp, _Tp&&> |
|
|
1074 |
{ }; |
|
|
1075 |
|
|
|
1076 |
/// is_nothrow_move_constructible |
|
|
1077 |
template |
|
|
1078 |
struct is_nothrow_move_constructible |
|
|
1079 |
: public __is_nothrow_move_constructible_impl<_Tp> |
|
|
1080 |
{ }; |
|
|
1081 |
|
|
|
1082 |
template |
|
|
1083 |
class __is_assignable_helper |
|
|
1084 |
: public __sfinae_types |
|
|
1085 |
{ |
|
|
1086 |
template |
|
|
1087 |
static decltype(declval<_Tp1>() = declval<_Up1>(), __one()) |
|
|
1088 |
__test(int); |
|
|
1089 |
|
|
|
1090 |
template |
|
|
1091 |
static __two __test(...); |
|
|
1092 |
|
|
|
1093 |
public: |
|
|
1094 |
static constexpr bool value = sizeof(__test<_Tp, _Up>(0)) == 1; |
|
|
1095 |
}; |
|
|
1096 |
|
|
|
1097 |
/// is_assignable |
|
|
1098 |
template |
|
|
1099 |
struct is_assignable |
|
|
1100 |
: public integral_constant |
|
|
1101 |
__is_assignable_helper<_Tp, _Up>::value> |
|
|
1102 |
{ }; |
|
|
1103 |
|
|
|
1104 |
template::value> |
|
|
1105 |
struct __is_copy_assignable_impl; |
|
|
1106 |
|
|
|
1107 |
template |
|
|
1108 |
struct __is_copy_assignable_impl<_Tp, true> |
|
|
1109 |
: public false_type { }; |
|
|
1110 |
|
|
|
1111 |
template |
|
|
1112 |
struct __is_copy_assignable_impl<_Tp, false> |
|
|
1113 |
: public is_assignable<_Tp&, const _Tp&> |
|
|
1114 |
{ }; |
|
|
1115 |
|
|
|
1116 |
/// is_copy_assignable |
|
|
1117 |
template |
|
|
1118 |
struct is_copy_assignable |
|
|
1119 |
: public __is_copy_assignable_impl<_Tp> |
|
|
1120 |
{ }; |
|
|
1121 |
|
|
|
1122 |
template::value> |
|
|
1123 |
struct __is_move_assignable_impl; |
|
|
1124 |
|
|
|
1125 |
template |
|
|
1126 |
struct __is_move_assignable_impl<_Tp, true> |
|
|
1127 |
: public false_type { }; |
|
|
1128 |
|
|
|
1129 |
template |
|
|
1130 |
struct __is_move_assignable_impl<_Tp, false> |
|
|
1131 |
: public is_assignable<_Tp&, _Tp&&> |
|
|
1132 |
{ }; |
|
|
1133 |
|
|
|
1134 |
/// is_move_assignable |
|
|
1135 |
template |
|
|
1136 |
struct is_move_assignable |
|
|
1137 |
: public __is_move_assignable_impl<_Tp> |
|
|
1138 |
{ }; |
|
|
1139 |
|
|
|
1140 |
template |
|
|
1141 |
struct __is_nt_assignable_impl |
|
|
1142 |
: public integral_constant() = declval<_Up>())> |
|
|
1143 |
{ }; |
|
|
1144 |
|
|
|
1145 |
/// is_nothrow_assignable |
|
|
1146 |
template |
|
|
1147 |
struct is_nothrow_assignable |
|
|
1148 |
: public __and_, |
|
|
1149 |
__is_nt_assignable_impl<_Tp, _Up>>::type |
|
|
1150 |
{ }; |
|
|
1151 |
|
|
|
1152 |
template::value> |
|
|
1153 |
struct __is_nt_copy_assignable_impl; |
|
|
1154 |
|
|
|
1155 |
template |
|
|
1156 |
struct __is_nt_copy_assignable_impl<_Tp, true> |
|
|
1157 |
: public false_type { }; |
|
|
1158 |
|
|
|
1159 |
template |
|
|
1160 |
struct __is_nt_copy_assignable_impl<_Tp, false> |
|
|
1161 |
: public is_nothrow_assignable<_Tp&, const _Tp&> |
|
|
1162 |
{ }; |
|
|
1163 |
|
|
|
1164 |
/// is_nothrow_copy_assignable |
|
|
1165 |
template |
|
|
1166 |
struct is_nothrow_copy_assignable |
|
|
1167 |
: public __is_nt_copy_assignable_impl<_Tp> |
|
|
1168 |
{ }; |
|
|
1169 |
|
|
|
1170 |
template::value> |
|
|
1171 |
struct __is_nt_move_assignable_impl; |
|
|
1172 |
|
|
|
1173 |
template |
|
|
1174 |
struct __is_nt_move_assignable_impl<_Tp, true> |
|
|
1175 |
: public false_type { }; |
|
|
1176 |
|
|
|
1177 |
template |
|
|
1178 |
struct __is_nt_move_assignable_impl<_Tp, false> |
|
|
1179 |
: public is_nothrow_assignable<_Tp&, _Tp&&> |
|
|
1180 |
{ }; |
|
|
1181 |
|
|
|
1182 |
/// is_nothrow_move_assignable |
|
|
1183 |
template |
|
|
1184 |
struct is_nothrow_move_assignable |
|
|
1185 |
: public __is_nt_move_assignable_impl<_Tp> |
|
|
1186 |
{ }; |
|
|
1187 |
|
|
|
1188 |
/// is_trivially_constructible (still unimplemented) |
|
|
1189 |
|
|
|
1190 |
/// is_trivially_default_constructible (still unimplemented) |
|
|
1191 |
|
|
|
1192 |
/// is_trivially_copy_constructible (still unimplemented) |
|
|
1193 |
|
|
|
1194 |
/// is_trivially_move_constructible (still unimplemented) |
|
|
1195 |
|
|
|
1196 |
/// is_trivially_assignable (still unimplemented) |
|
|
1197 |
|
|
|
1198 |
/// is_trivially_copy_assignable (still unimplemented) |
|
|
1199 |
|
|
|
1200 |
/// is_trivially_move_assignable (still unimplemented) |
|
|
1201 |
|
|
|
1202 |
/// is_trivially_destructible |
|
|
1203 |
template |
|
|
1204 |
struct is_trivially_destructible |
|
|
1205 |
: public __and_, integral_constant |
|
|
1206 |
__has_trivial_destructor(_Tp)>>::type |
|
|
1207 |
{ }; |
|
|
1208 |
|
|
|
1209 |
/// has_trivial_default_constructor (temporary legacy) |
|
|
1210 |
template |
|
|
1211 |
struct has_trivial_default_constructor |
|
|
1212 |
: public integral_constant |
|
|
1213 |
{ }; |
|
|
1214 |
|
|
|
1215 |
/// has_trivial_copy_constructor (temporary legacy) |
|
|
1216 |
template |
|
|
1217 |
struct has_trivial_copy_constructor |
|
|
1218 |
: public integral_constant |
|
|
1219 |
{ }; |
|
|
1220 |
|
|
|
1221 |
/// has_trivial_copy_assign (temporary legacy) |
|
|
1222 |
template |
|
|
1223 |
struct has_trivial_copy_assign |
|
|
1224 |
: public integral_constant |
|
|
1225 |
{ }; |
|
|
1226 |
|
|
|
1227 |
/// has_virtual_destructor |
|
|
1228 |
template |
|
|
1229 |
struct has_virtual_destructor |
|
|
1230 |
: public integral_constant |
|
|
1231 |
{ }; |
|
|
1232 |
|
|
|
1233 |
|
|
|
1234 |
// type property queries. |
|
|
1235 |
|
|
|
1236 |
/// alignment_of |
|
|
1237 |
template |
|
|
1238 |
struct alignment_of |
|
|
1239 |
: public integral_constant { }; |
|
|
1240 |
|
|
|
1241 |
/// rank |
|
|
1242 |
template |
|
|
1243 |
struct rank |
|
|
1244 |
: public integral_constant { }; |
|
|
1245 |
|
|
|
1246 |
template |
|
|
1247 |
struct rank<_Tp[_Size]> |
|
|
1248 |
: public integral_constant::value> { }; |
|
|
1249 |
|
|
|
1250 |
template |
|
|
1251 |
struct rank<_Tp[]> |
|
|
1252 |
: public integral_constant::value> { }; |
|
|
1253 |
|
|
|
1254 |
/// extent |
|
|
1255 |
template |
|
|
1256 |
struct extent |
|
|
1257 |
: public integral_constant { }; |
|
|
1258 |
|
|
|
1259 |
template |
|
|
1260 |
struct extent<_Tp[_Size], _Uint> |
|
|
1261 |
: public integral_constant |
|
|
1262 |
_Uint == 0 ? _Size : extent<_Tp, |
|
|
1263 |
_Uint - 1>::value> |
|
|
1264 |
{ }; |
|
|
1265 |
|
|
|
1266 |
template |
|
|
1267 |
struct extent<_Tp[], _Uint> |
|
|
1268 |
: public integral_constant |
|
|
1269 |
_Uint == 0 ? 0 : extent<_Tp, |
|
|
1270 |
_Uint - 1>::value> |
|
|
1271 |
{ }; |
|
|
1272 |
|
|
|
1273 |
|
|
|
1274 |
// Type relations. |
|
|
1275 |
|
|
|
1276 |
/// is_same |
|
|
1277 |
template |
|
|
1278 |
struct is_same |
|
|
1279 |
: public false_type { }; |
|
|
1280 |
|
|
|
1281 |
template |
|
|
1282 |
struct is_same<_Tp, _Tp> |
|
|
1283 |
: public true_type { }; |
|
|
1284 |
|
|
|
1285 |
/// is_base_of |
|
|
1286 |
template |
|
|
1287 |
struct is_base_of |
|
|
1288 |
: public integral_constant |
|
|
1289 |
{ }; |
|
|
1290 |
|
|
|
1291 |
template |
|
|
1292 |
bool = __or_, is_function<_To>, |
|
|
1293 |
is_array<_To>>::value> |
|
|
1294 |
struct __is_convertible_helper |
|
|
1295 |
{ static constexpr bool value = is_void<_To>::value; }; |
|
|
1296 |
|
|
|
1297 |
template |
|
|
1298 |
class __is_convertible_helper<_From, _To, false> |
|
|
1299 |
: public __sfinae_types |
|
|
1300 |
{ |
|
|
1301 |
template |
|
|
1302 |
static void __test_aux(_To1); |
|
|
1303 |
|
|
|
1304 |
template |
|
|
1305 |
static decltype(__test_aux<_To1>(std::declval<_From1>()), __one()) |
|
|
1306 |
__test(int); |
|
|
1307 |
|
|
|
1308 |
template |
|
|
1309 |
static __two __test(...); |
|
|
1310 |
|
|
|
1311 |
public: |
|
|
1312 |
static constexpr bool value = sizeof(__test<_From, _To>(0)) == 1; |
|
|
1313 |
}; |
|
|
1314 |
|
|
|
1315 |
/// is_convertible |
|
|
1316 |
template |
|
|
1317 |
struct is_convertible |
|
|
1318 |
: public integral_constant |
|
|
1319 |
__is_convertible_helper<_From, _To>::value> |
|
|
1320 |
{ }; |
|
|
1321 |
|
|
|
1322 |
|
|
|
1323 |
// Const-volatile modifications. |
|
|
1324 |
|
|
|
1325 |
/// remove_const |
|
|
1326 |
template |
|
|
1327 |
struct remove_const |
|
|
1328 |
{ typedef _Tp type; }; |
|
|
1329 |
|
|
|
1330 |
template |
|
|
1331 |
struct remove_const<_Tp const> |
|
|
1332 |
{ typedef _Tp type; }; |
|
|
1333 |
|
|
|
1334 |
/// remove_volatile |
|
|
1335 |
template |
|
|
1336 |
struct remove_volatile |
|
|
1337 |
{ typedef _Tp type; }; |
|
|
1338 |
|
|
|
1339 |
template |
|
|
1340 |
struct remove_volatile<_Tp volatile> |
|
|
1341 |
{ typedef _Tp type; }; |
|
|
1342 |
|
|
|
1343 |
/// remove_cv |
|
|
1344 |
template |
|
|
1345 |
struct remove_cv |
|
|
1346 |
{ |
|
|
1347 |
typedef typename |
|
|
1348 |
remove_const::type>::type type; |
|
|
1349 |
}; |
|
|
1350 |
|
|
|
1351 |
/// add_const |
|
|
1352 |
template |
|
|
1353 |
struct add_const |
|
|
1354 |
{ typedef _Tp const type; }; |
|
|
1355 |
|
|
|
1356 |
/// add_volatile |
|
|
1357 |
template |
|
|
1358 |
struct add_volatile |
|
|
1359 |
{ typedef _Tp volatile type; }; |
|
|
1360 |
|
|
|
1361 |
/// add_cv |
|
|
1362 |
template |
|
|
1363 |
struct add_cv |
|
|
1364 |
{ |
|
|
1365 |
typedef typename |
|
|
1366 |
add_const::type>::type type; |
|
|
1367 |
}; |
|
|
1368 |
|
|
|
1369 |
|
|
|
1370 |
// Reference transformations. |
|
|
1371 |
|
|
|
1372 |
/// remove_reference |
|
|
1373 |
template |
|
|
1374 |
struct remove_reference |
|
|
1375 |
{ typedef _Tp type; }; |
|
|
1376 |
|
|
|
1377 |
template |
|
|
1378 |
struct remove_reference<_Tp&> |
|
|
1379 |
{ typedef _Tp type; }; |
|
|
1380 |
|
|
|
1381 |
template |
|
|
1382 |
struct remove_reference<_Tp&&> |
|
|
1383 |
{ typedef _Tp type; }; |
|
|
1384 |
|
|
|
1385 |
template |
|
|
1386 |
bool = __and_<__not_>, |
|
|
1387 |
__not_>>::value, |
|
|
1388 |
bool = is_rvalue_reference<_Tp>::value> |
|
|
1389 |
struct __add_lvalue_reference_helper |
|
|
1390 |
{ typedef _Tp type; }; |
|
|
1391 |
|
|
|
1392 |
template |
|
|
1393 |
struct __add_lvalue_reference_helper<_Tp, true, false> |
|
|
1394 |
{ typedef _Tp& type; }; |
|
|
1395 |
|
|
|
1396 |
template |
|
|
1397 |
struct __add_lvalue_reference_helper<_Tp, false, true> |
|
|
1398 |
{ typedef typename remove_reference<_Tp>::type& type; }; |
|
|
1399 |
|
|
|
1400 |
/// add_lvalue_reference |
|
|
1401 |
template |
|
|
1402 |
struct add_lvalue_reference |
|
|
1403 |
: public __add_lvalue_reference_helper<_Tp> |
|
|
1404 |
{ }; |
|
|
1405 |
|
|
|
1406 |
template |
|
|
1407 |
bool = __and_<__not_>, |
|
|
1408 |
__not_>>::value> |
|
|
1409 |
struct __add_rvalue_reference_helper |
|
|
1410 |
{ typedef _Tp type; }; |
|
|
1411 |
|
|
|
1412 |
template |
|
|
1413 |
struct __add_rvalue_reference_helper<_Tp, true> |
|
|
1414 |
{ typedef _Tp&& type; }; |
|
|
1415 |
|
|
|
1416 |
/// add_rvalue_reference |
|
|
1417 |
template |
|
|
1418 |
struct add_rvalue_reference |
|
|
1419 |
: public __add_rvalue_reference_helper<_Tp> |
|
|
1420 |
{ }; |
|
|
1421 |
|
|
|
1422 |
|
|
|
1423 |
// Sign modifications. |
|
|
1424 |
|
|
|
1425 |
// Utility for constructing identically cv-qualified types. |
|
|
1426 |
template |
|
|
1427 |
struct __cv_selector; |
|
|
1428 |
|
|
|
1429 |
template |
|
|
1430 |
struct __cv_selector<_Unqualified, false, false> |
|
|
1431 |
{ typedef _Unqualified __type; }; |
|
|
1432 |
|
|
|
1433 |
template |
|
|
1434 |
struct __cv_selector<_Unqualified, false, true> |
|
|
1435 |
{ typedef volatile _Unqualified __type; }; |
|
|
1436 |
|
|
|
1437 |
template |
|
|
1438 |
struct __cv_selector<_Unqualified, true, false> |
|
|
1439 |
{ typedef const _Unqualified __type; }; |
|
|
1440 |
|
|
|
1441 |
template |
|
|
1442 |
struct __cv_selector<_Unqualified, true, true> |
|
|
1443 |
{ typedef const volatile _Unqualified __type; }; |
|
|
1444 |
|
|
|
1445 |
template |
|
|
1446 |
bool _IsConst = is_const<_Qualified>::value, |
|
|
1447 |
bool _IsVol = is_volatile<_Qualified>::value> |
|
|
1448 |
class __match_cv_qualifiers |
|
|
1449 |
{ |
|
|
1450 |
typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; |
|
|
1451 |
|
|
|
1452 |
public: |
|
|
1453 |
typedef typename __match::__type __type; |
|
|
1454 |
}; |
|
|
1455 |
|
|
|
1456 |
// Utility for finding the unsigned versions of signed integral types. |
|
|
1457 |
template |
|
|
1458 |
struct __make_unsigned |
|
|
1459 |
{ typedef _Tp __type; }; |
|
|
1460 |
|
|
|
1461 |
template<> |
|
|
1462 |
struct __make_unsigned |
|
|
1463 |
{ typedef unsigned char __type; }; |
|
|
1464 |
|
|
|
1465 |
template<> |
|
|
1466 |
struct __make_unsigned |
|
|
1467 |
{ typedef unsigned char __type; }; |
|
|
1468 |
|
|
|
1469 |
template<> |
|
|
1470 |
struct __make_unsigned |
|
|
1471 |
{ typedef unsigned short __type; }; |
|
|
1472 |
|
|
|
1473 |
template<> |
|
|
1474 |
struct __make_unsigned |
|
|
1475 |
{ typedef unsigned int __type; }; |
|
|
1476 |
|
|
|
1477 |
template<> |
|
|
1478 |
struct __make_unsigned |
|
|
1479 |
{ typedef unsigned long __type; }; |
|
|
1480 |
|
|
|
1481 |
template<> |
|
|
1482 |
struct __make_unsigned |
|
|
1483 |
{ typedef unsigned long long __type; }; |
|
|
1484 |
|
|
|
1485 |
#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128) |
|
|
1486 |
template<> |
|
|
1487 |
struct __make_unsigned<__int128> |
|
|
1488 |
{ typedef unsigned __int128 __type; }; |
|
|
1489 |
#endif |
|
|
1490 |
|
|
|
1491 |
// Select between integral and enum: not possible to be both. |
|
|
1492 |
template |
|
|
1493 |
bool _IsInt = is_integral<_Tp>::value, |
|
|
1494 |
bool _IsEnum = is_enum<_Tp>::value> |
|
|
1495 |
class __make_unsigned_selector; |
|
|
1496 |
|
|
|
1497 |
template |
|
|
1498 |
class __make_unsigned_selector<_Tp, true, false> |
|
|
1499 |
{ |
|
|
1500 |
typedef __make_unsigned::type> __unsignedt; |
|
|
1501 |
typedef typename __unsignedt::__type __unsigned_type; |
|
|
1502 |
typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; |
|
|
1503 |
|
|
|
1504 |
public: |
|
|
1505 |
typedef typename __cv_unsigned::__type __type; |
|
|
1506 |
}; |
|
|
1507 |
|
|
|
1508 |
template |
|
|
1509 |
class __make_unsigned_selector<_Tp, false, true> |
|
|
1510 |
{ |
|
|
1511 |
// With -fshort-enums, an enum may be as small as a char. |
|
|
1512 |
typedef unsigned char __smallest; |
|
|
1513 |
static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); |
|
|
1514 |
static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short); |
|
|
1515 |
static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int); |
|
|
1516 |
typedef conditional<__b2, unsigned int, unsigned long> __cond2; |
|
|
1517 |
typedef typename __cond2::type __cond2_type; |
|
|
1518 |
typedef conditional<__b1, unsigned short, __cond2_type> __cond1; |
|
|
1519 |
typedef typename __cond1::type __cond1_type; |
|
|
1520 |
|
|
|
1521 |
public: |
|
|
1522 |
typedef typename conditional<__b0, __smallest, __cond1_type>::type __type; |
|
|
1523 |
}; |
|
|
1524 |
|
|
|
1525 |
// Given an integral/enum type, return the corresponding unsigned |
|
|
1526 |
// integer type. |
|
|
1527 |
// Primary template. |
|
|
1528 |
/// make_unsigned |
|
|
1529 |
template |
|
|
1530 |
struct make_unsigned |
|
|
1531 |
{ typedef typename __make_unsigned_selector<_Tp>::__type type; }; |
|
|
1532 |
|
|
|
1533 |
// Integral, but don't define. |
|
|
1534 |
template<> |
|
|
1535 |
struct make_unsigned; |
|
|
1536 |
|
|
|
1537 |
|
|
|
1538 |
// Utility for finding the signed versions of unsigned integral types. |
|
|
1539 |
template |
|
|
1540 |
struct __make_signed |
|
|
1541 |
{ typedef _Tp __type; }; |
|
|
1542 |
|
|
|
1543 |
template<> |
|
|
1544 |
struct __make_signed |
|
|
1545 |
{ typedef signed char __type; }; |
|
|
1546 |
|
|
|
1547 |
template<> |
|
|
1548 |
struct __make_signed |
|
|
1549 |
{ typedef signed char __type; }; |
|
|
1550 |
|
|
|
1551 |
template<> |
|
|
1552 |
struct __make_signed |
|
|
1553 |
{ typedef signed short __type; }; |
|
|
1554 |
|
|
|
1555 |
template<> |
|
|
1556 |
struct __make_signed |
|
|
1557 |
{ typedef signed int __type; }; |
|
|
1558 |
|
|
|
1559 |
template<> |
|
|
1560 |
struct __make_signed |
|
|
1561 |
{ typedef signed long __type; }; |
|
|
1562 |
|
|
|
1563 |
template<> |
|
|
1564 |
struct __make_signed |
|
|
1565 |
{ typedef signed long long __type; }; |
|
|
1566 |
|
|
|
1567 |
#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128) |
|
|
1568 |
template<> |
|
|
1569 |
struct __make_signed |
|
|
1570 |
{ typedef __int128 __type; }; |
|
|
1571 |
#endif |
|
|
1572 |
|
|
|
1573 |
// Select between integral and enum: not possible to be both. |
|
|
1574 |
template |
|
|
1575 |
bool _IsInt = is_integral<_Tp>::value, |
|
|
1576 |
bool _IsEnum = is_enum<_Tp>::value> |
|
|
1577 |
class __make_signed_selector; |
|
|
1578 |
|
|
|
1579 |
template |
|
|
1580 |
class __make_signed_selector<_Tp, true, false> |
|
|
1581 |
{ |
|
|
1582 |
typedef __make_signed::type> __signedt; |
|
|
1583 |
typedef typename __signedt::__type __signed_type; |
|
|
1584 |
typedef __match_cv_qualifiers<_Tp, __signed_type> __cv_signed; |
|
|
1585 |
|
|
|
1586 |
public: |
|
|
1587 |
typedef typename __cv_signed::__type __type; |
|
|
1588 |
}; |
|
|
1589 |
|
|
|
1590 |
template |
|
|
1591 |
class __make_signed_selector<_Tp, false, true> |
|
|
1592 |
{ |
|
|
1593 |
// With -fshort-enums, an enum may be as small as a char. |
|
|
1594 |
typedef signed char __smallest; |
|
|
1595 |
static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); |
|
|
1596 |
static const bool __b1 = sizeof(_Tp) <= sizeof(signed short); |
|
|
1597 |
static const bool __b2 = sizeof(_Tp) <= sizeof(signed int); |
|
|
1598 |
typedef conditional<__b2, signed int, signed long> __cond2; |
|
|
1599 |
typedef typename __cond2::type __cond2_type; |
|
|
1600 |
typedef conditional<__b1, signed short, __cond2_type> __cond1; |
|
|
1601 |
typedef typename __cond1::type __cond1_type; |
|
|
1602 |
|
|
|
1603 |
public: |
|
|
1604 |
typedef typename conditional<__b0, __smallest, __cond1_type>::type __type; |
|
|
1605 |
}; |
|
|
1606 |
|
|
|
1607 |
// Given an integral/enum type, return the corresponding signed |
|
|
1608 |
// integer type. |
|
|
1609 |
// Primary template. |
|
|
1610 |
/// make_signed |
|
|
1611 |
template |
|
|
1612 |
struct make_signed |
|
|
1613 |
{ typedef typename __make_signed_selector<_Tp>::__type type; }; |
|
|
1614 |
|
|
|
1615 |
// Integral, but don't define. |
|
|
1616 |
template<> |
|
|
1617 |
struct make_signed; |
|
|
1618 |
|
|
|
1619 |
|
|
|
1620 |
// Array modifications. |
|
|
1621 |
|
|
|
1622 |
/// remove_extent |
|
|
1623 |
template |
|
|
1624 |
struct remove_extent |
|
|
1625 |
{ typedef _Tp type; }; |
|
|
1626 |
|
|
|
1627 |
template |
|
|
1628 |
struct remove_extent<_Tp[_Size]> |
|
|
1629 |
{ typedef _Tp type; }; |
|
|
1630 |
|
|
|
1631 |
template |
|
|
1632 |
struct remove_extent<_Tp[]> |
|
|
1633 |
{ typedef _Tp type; }; |
|
|
1634 |
|
|
|
1635 |
/// remove_all_extents |
|
|
1636 |
template |
|
|
1637 |
struct remove_all_extents |
|
|
1638 |
{ typedef _Tp type; }; |
|
|
1639 |
|
|
|
1640 |
template |
|
|
1641 |
struct remove_all_extents<_Tp[_Size]> |
|
|
1642 |
{ typedef typename remove_all_extents<_Tp>::type type; }; |
|
|
1643 |
|
|
|
1644 |
template |
|
|
1645 |
struct remove_all_extents<_Tp[]> |
|
|
1646 |
{ typedef typename remove_all_extents<_Tp>::type type; }; |
|
|
1647 |
|
|
|
1648 |
|
|
|
1649 |
// Pointer modifications. |
|
|
1650 |
|
|
|
1651 |
template |
|
|
1652 |
struct __remove_pointer_helper |
|
|
1653 |
{ typedef _Tp type; }; |
|
|
1654 |
|
|
|
1655 |
template |
|
|
1656 |
struct __remove_pointer_helper<_Tp, _Up*> |
|
|
1657 |
{ typedef _Up type; }; |
|
|
1658 |
|
|
|
1659 |
/// remove_pointer |
|
|
1660 |
template |
|
|
1661 |
struct remove_pointer |
|
|
1662 |
: public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type> |
|
|
1663 |
{ }; |
|
|
1664 |
|
|
|
1665 |
/// add_pointer |
|
|
1666 |
template |
|
|
1667 |
struct add_pointer |
|
|
1668 |
{ typedef typename remove_reference<_Tp>::type* type; }; |
|
|
1669 |
|
|
|
1670 |
|
|
|
1671 |
template |
|
|
1672 |
struct __aligned_storage_msa |
|
|
1673 |
{ |
|
|
1674 |
union __type |
|
|
1675 |
{ |
|
|
1676 |
unsigned char __data[_Len]; |
|
|
1677 |
struct __attribute__((__aligned__)) { } __align; |
|
|
1678 |
}; |
|
|
1679 |
}; |
|
|
1680 |
|
|
|
1681 |
/** |
|
|
1682 |
* @brief Alignment type. |
|
|
1683 |
* |
|
|
1684 |
* The value of _Align is a default-alignment which shall be the |
|
|
1685 |
* most stringent alignment requirement for any C++ object type |
|
|
1686 |
* whose size is no greater than _Len (3.9). The member typedef |
|
|
1687 |
* type shall be a POD type suitable for use as uninitialized |
|
|
1688 |
* storage for any object whose size is at most _Len and whose |
|
|
1689 |
* alignment is a divisor of _Align. |
|
|
1690 |
*/ |
|
|
1691 |
template |
|
|
1692 |
__alignof__(typename __aligned_storage_msa<_Len>::__type)> |
|
|
1693 |
struct aligned_storage |
|
|
1694 |
{ |
|
|
1695 |
union type |
|
|
1696 |
{ |
|
|
1697 |
unsigned char __data[_Len]; |
|
|
1698 |
struct __attribute__((__aligned__((_Align)))) { } __align; |
|
|
1699 |
}; |
|
|
1700 |
}; |
|
|
1701 |
|
|
|
1702 |
|
|
|
1703 |
// Decay trait for arrays and functions, used for perfect forwarding |
|
|
1704 |
// in make_pair, make_tuple, etc. |
|
|
1705 |
template |
|
|
1706 |
bool _IsArray = is_array<_Up>::value, |
|
|
1707 |
bool _IsFunction = is_function<_Up>::value> |
|
|
1708 |
struct __decay_selector; |
|
|
1709 |
|
|
|
1710 |
// NB: DR 705. |
|
|
1711 |
template |
|
|
1712 |
struct __decay_selector<_Up, false, false> |
|
|
1713 |
{ typedef typename remove_cv<_Up>::type __type; }; |
|
|
1714 |
|
|
|
1715 |
template |
|
|
1716 |
struct __decay_selector<_Up, true, false> |
|
|
1717 |
{ typedef typename remove_extent<_Up>::type* __type; }; |
|
|
1718 |
|
|
|
1719 |
template |
|
|
1720 |
struct __decay_selector<_Up, false, true> |
|
|
1721 |
{ typedef typename add_pointer<_Up>::type __type; }; |
|
|
1722 |
|
|
|
1723 |
/// decay |
|
|
1724 |
template |
|
|
1725 |
class decay |
|
|
1726 |
{ |
|
|
1727 |
typedef typename remove_reference<_Tp>::type __remove_type; |
|
|
1728 |
|
|
|
1729 |
public: |
|
|
1730 |
typedef typename __decay_selector<__remove_type>::__type type; |
|
|
1731 |
}; |
|
|
1732 |
|
|
|
1733 |
template |
|
|
1734 |
class reference_wrapper; |
|
|
1735 |
|
|
|
1736 |
// Helper which adds a reference to a type when given a reference_wrapper |
|
|
1737 |
template |
|
|
1738 |
struct __strip_reference_wrapper |
|
|
1739 |
{ |
|
|
1740 |
typedef _Tp __type; |
|
|
1741 |
}; |
|
|
1742 |
|
|
|
1743 |
template |
|
|
1744 |
struct __strip_reference_wrapper > |
|
|
1745 |
{ |
|
|
1746 |
typedef _Tp& __type; |
|
|
1747 |
}; |
|
|
1748 |
|
|
|
1749 |
template |
|
|
1750 |
struct __strip_reference_wrapper > |
|
|
1751 |
{ |
|
|
1752 |
typedef _Tp& __type; |
|
|
1753 |
}; |
|
|
1754 |
|
|
|
1755 |
template |
|
|
1756 |
struct __decay_and_strip |
|
|
1757 |
{ |
|
|
1758 |
typedef typename __strip_reference_wrapper< |
|
|
1759 |
typename decay<_Tp>::type>::__type __type; |
|
|
1760 |
}; |
|
|
1761 |
|
|
|
1762 |
|
|
|
1763 |
// Primary template. |
|
|
1764 |
/// Define a member typedef @c type only if a boolean constant is true. |
|
|
1765 |
template |
|
|
1766 |
struct enable_if |
|
|
1767 |
{ }; |
|
|
1768 |
|
|
|
1769 |
// Partial specialization for true. |
|
|
1770 |
template |
|
|
1771 |
struct enable_if |
|
|
1772 |
{ typedef _Tp type; }; |
|
|
1773 |
|
|
|
1774 |
template |
|
|
1775 |
using _Require = typename enable_if<__and_<_Cond...>::value>::type; |
|
|
1776 |
|
|
|
1777 |
// Primary template. |
|
|
1778 |
/// Define a member typedef @c type to one of two argument types. |
|
|
1779 |
template |
|
|
1780 |
struct conditional |
|
|
1781 |
{ typedef _Iftrue type; }; |
|
|
1782 |
|
|
|
1783 |
// Partial specialization for false. |
|
|
1784 |
template |
|
|
1785 |
struct conditional |
|
|
1786 |
{ typedef _Iffalse type; }; |
|
|
1787 |
|
|
|
1788 |
/// common_type |
|
|
1789 |
template |
|
|
1790 |
struct common_type; |
|
|
1791 |
|
|
|
1792 |
// Sfinae-friendly common_type implementation: |
|
|
1793 |
|
|
|
1794 |
struct __do_common_type_impl |
|
|
1795 |
{ |
|
|
1796 |
template |
|
|
1797 |
static __success_type |
|
|
1798 |
(true ? std::declval<_Tp>() |
|
|
1799 |
: std::declval<_Up>())>::type> _S_test(int); |
|
|
1800 |
|
|
|
1801 |
template |
|
|
1802 |
static __failure_type _S_test(...); |
|
|
1803 |
}; |
|
|
1804 |
|
|
|
1805 |
template |
|
|
1806 |
struct __common_type_impl |
|
|
1807 |
: private __do_common_type_impl |
|
|
1808 |
{ |
|
|
1809 |
typedef decltype(_S_test<_Tp, _Up>(0)) type; |
|
|
1810 |
}; |
|
|
1811 |
|
|
|
1812 |
struct __do_member_type_wrapper |
|
|
1813 |
{ |
|
|
1814 |
template |
|
|
1815 |
static __success_type _S_test(int); |
|
|
1816 |
|
|
|
1817 |
template |
|
|
1818 |
static __failure_type _S_test(...); |
|
|
1819 |
}; |
|
|
1820 |
|
|
|
1821 |
template |
|
|
1822 |
struct __member_type_wrapper |
|
|
1823 |
: private __do_member_type_wrapper |
|
|
1824 |
{ |
|
|
1825 |
typedef decltype(_S_test<_Tp>(0)) type; |
|
|
1826 |
}; |
|
|
1827 |
|
|
|
1828 |
template |
|
|
1829 |
struct __expanded_common_type_wrapper |
|
|
1830 |
{ |
|
|
1831 |
typedef common_type type; |
|
|
1832 |
}; |
|
|
1833 |
|
|
|
1834 |
template |
|
|
1835 |
struct __expanded_common_type_wrapper<__failure_type, _Args...> |
|
|
1836 |
{ typedef __failure_type type; }; |
|
|
1837 |
|
|
|
1838 |
template |
|
|
1839 |
struct common_type<_Tp> |
|
|
1840 |
{ typedef typename decay<_Tp>::type type; }; |
|
|
1841 |
|
|
|
1842 |
template |
|
|
1843 |
struct common_type<_Tp, _Up> |
|
|
1844 |
: public __common_type_impl<_Tp, _Up>::type |
|
|
1845 |
{ }; |
|
|
1846 |
|
|
|
1847 |
template |
|
|
1848 |
struct common_type<_Tp, _Up, _Vp...> |
|
|
1849 |
: public __expanded_common_type_wrapper |
|
|
1850 |
common_type<_Tp, _Up>>::type, _Vp...>::type |
|
|
1851 |
{ }; |
|
|
1852 |
|
|
|
1853 |
/// The underlying type of an enum. |
|
|
1854 |
template |
|
|
1855 |
struct underlying_type |
|
|
1856 |
{ |
|
|
1857 |
typedef __underlying_type(_Tp) type; |
|
|
1858 |
}; |
|
|
1859 |
|
|
|
1860 |
template |
|
|
1861 |
struct __declval_protector |
|
|
1862 |
{ |
|
|
1863 |
static const bool __stop = false; |
|
|
1864 |
static typename add_rvalue_reference<_Tp>::type __delegate(); |
|
|
1865 |
}; |
|
|
1866 |
|
|
|
1867 |
template |
|
|
1868 |
inline typename add_rvalue_reference<_Tp>::type |
|
|
1869 |
declval() noexcept |
|
|
1870 |
{ |
|
|
1871 |
static_assert(__declval_protector<_Tp>::__stop, |
|
|
1872 |
"declval() must not be used!"); |
|
|
1873 |
return __declval_protector<_Tp>::__delegate(); |
|
|
1874 |
} |
|
|
1875 |
|
|
|
1876 |
/// result_of |
|
|
1877 |
template |
|
|
1878 |
class result_of; |
|
|
1879 |
|
|
|
1880 |
// Sfinae-friendly result_of implementation: |
|
|
1881 |
|
|
|
1882 |
// [func.require] paragraph 1 bullet 1: |
|
|
1883 |
struct __result_of_memfun_ref_impl |
|
|
1884 |
{ |
|
|
1885 |
template |
|
|
1886 |
static __success_type |
|
|
1887 |
(std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...) |
|
|
1888 |
)> _S_test(int); |
|
|
1889 |
|
|
|
1890 |
template |
|
|
1891 |
static __failure_type _S_test(...); |
|
|
1892 |
}; |
|
|
1893 |
|
|
|
1894 |
template |
|
|
1895 |
struct __result_of_memfun_ref |
|
|
1896 |
: private __result_of_memfun_ref_impl |
|
|
1897 |
{ |
|
|
1898 |
typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; |
|
|
1899 |
}; |
|
|
1900 |
|
|
|
1901 |
// [func.require] paragraph 1 bullet 2: |
|
|
1902 |
struct __result_of_memfun_deref_impl |
|
|
1903 |
{ |
|
|
1904 |
template |
|
|
1905 |
static __success_type |
|
|
1906 |
((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...) |
|
|
1907 |
)> _S_test(int); |
|
|
1908 |
|
|
|
1909 |
template |
|
|
1910 |
static __failure_type _S_test(...); |
|
|
1911 |
}; |
|
|
1912 |
|
|
|
1913 |
template |
|
|
1914 |
struct __result_of_memfun_deref |
|
|
1915 |
: private __result_of_memfun_deref_impl |
|
|
1916 |
{ |
|
|
1917 |
typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; |
|
|
1918 |
}; |
|
|
1919 |
|
|
|
1920 |
// [func.require] paragraph 1 bullet 3: |
|
|
1921 |
struct __result_of_memobj_ref_impl |
|
|
1922 |
{ |
|
|
1923 |
template |
|
|
1924 |
static __success_type |
|
|
1925 |
std::declval<_Tp1>().*std::declval<_Fp>() |
|
|
1926 |
)> _S_test(int); |
|
|
1927 |
|
|
|
1928 |
template |
|
|
1929 |
static __failure_type _S_test(...); |
|
|
1930 |
}; |
|
|
1931 |
|
|
|
1932 |
template |
|
|
1933 |
struct __result_of_memobj_ref |
|
|
1934 |
: private __result_of_memobj_ref_impl |
|
|
1935 |
{ |
|
|
1936 |
typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; |
|
|
1937 |
}; |
|
|
1938 |
|
|
|
1939 |
// [func.require] paragraph 1 bullet 4: |
|
|
1940 |
struct __result_of_memobj_deref_impl |
|
|
1941 |
{ |
|
|
1942 |
template |
|
|
1943 |
static __success_type |
|
|
1944 |
(*std::declval<_Tp1>()).*std::declval<_Fp>() |
|
|
1945 |
)> _S_test(int); |
|
|
1946 |
|
|
|
1947 |
template |
|
|
1948 |
static __failure_type _S_test(...); |
|
|
1949 |
}; |
|
|
1950 |
|
|
|
1951 |
template |
|
|
1952 |
struct __result_of_memobj_deref |
|
|
1953 |
: private __result_of_memobj_deref_impl |
|
|
1954 |
{ |
|
|
1955 |
typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; |
|
|
1956 |
}; |
|
|
1957 |
|
|
|
1958 |
template |
|
|
1959 |
struct __result_of_memobj; |
|
|
1960 |
|
|
|
1961 |
template |
|
|
1962 |
struct __result_of_memobj<_Res _Class::*, _Arg> |
|
|
1963 |
{ |
|
|
1964 |
typedef typename remove_cv |
|
|
1965 |
_Arg>::type>::type _Argval; |
|
|
1966 |
typedef _Res _Class::* _MemPtr; |
|
|
1967 |
typedef typename conditional<__or_, |
|
|
1968 |
is_base_of<_Class, _Argval>>::value, |
|
|
1969 |
__result_of_memobj_ref<_MemPtr, _Arg>, |
|
|
1970 |
__result_of_memobj_deref<_MemPtr, _Arg> |
|
|
1971 |
>::type::type type; |
|
|
1972 |
}; |
|
|
1973 |
|
|
|
1974 |
template |
|
|
1975 |
struct __result_of_memfun; |
|
|
1976 |
|
|
|
1977 |
template |
|
|
1978 |
struct __result_of_memfun<_Res _Class::*, _Arg, _Args...> |
|
|
1979 |
{ |
|
|
1980 |
typedef typename remove_cv |
|
|
1981 |
_Arg>::type>::type _Argval; |
|
|
1982 |
typedef _Res _Class::* _MemPtr; |
|
|
1983 |
typedef typename conditional<__or_, |
|
|
1984 |
is_base_of<_Class, _Argval>>::value, |
|
|
1985 |
__result_of_memfun_ref<_MemPtr, _Arg, _Args...>, |
|
|
1986 |
__result_of_memfun_deref<_MemPtr, _Arg, _Args...> |
|
|
1987 |
>::type::type type; |
|
|
1988 |
}; |
|
|
1989 |
|
|
|
1990 |
template |
|
|
1991 |
struct __result_of_impl |
|
|
1992 |
{ |
|
|
1993 |
typedef __failure_type type; |
|
|
1994 |
}; |
|
|
1995 |
|
|
|
1996 |
template |
|
|
1997 |
struct __result_of_impl |
|
|
1998 |
: public __result_of_memobj::type, _Arg> |
|
|
1999 |
{ }; |
|
|
2000 |
|
|
|
2001 |
template |
|
|
2002 |
struct __result_of_impl |
|
|
2003 |
: public __result_of_memfun::type, _Arg, _Args...> |
|
|
2004 |
{ }; |
|
|
2005 |
|
|
|
2006 |
// [func.require] paragraph 1 bullet 5: |
|
|
2007 |
struct __result_of_other_impl |
|
|
2008 |
{ |
|
|
2009 |
template |
|
|
2010 |
static __success_type |
|
|
2011 |
std::declval<_Fn>()(std::declval<_Args>()...) |
|
|
2012 |
)> _S_test(int); |
|
|
2013 |
|
|
|
2014 |
template |
|
|
2015 |
static __failure_type _S_test(...); |
|
|
2016 |
}; |
|
|
2017 |
|
|
|
2018 |
template |
|
|
2019 |
struct __result_of_impl |
|
|
2020 |
: private __result_of_other_impl |
|
|
2021 |
{ |
|
|
2022 |
typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type; |
|
|
2023 |
}; |
|
|
2024 |
|
|
|
2025 |
template |
|
|
2026 |
struct result_of<_Functor(_ArgTypes...)> |
|
|
2027 |
: public __result_of_impl< |
|
|
2028 |
is_member_object_pointer< |
|
|
2029 |
typename remove_reference<_Functor>::type |
|
|
2030 |
>::value, |
|
|
2031 |
is_member_function_pointer< |
|
|
2032 |
typename remove_reference<_Functor>::type |
|
|
2033 |
>::value, |
|
|
2034 |
_Functor, _ArgTypes... |
|
|
2035 |
>::type |
|
|
2036 |
{ }; |
|
|
2037 |
|
|
|
2038 |
/// @} group metaprogramming |
|
|
2039 |
|
|
|
2040 |
/** |
|
|
2041 |
* Use SFINAE to determine if the type _Tp has a publicly-accessible |
|
|
2042 |
* member type _NTYPE. |
|
|
2043 |
*/ |
|
|
2044 |
#define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ |
|
|
2045 |
template \ |
|
|
2046 |
class __has_##_NTYPE##_helper \ |
|
|
2047 |
: __sfinae_types \ |
|
|
2048 |
{ \ |
|
|
2049 |
template \ |
|
|
2050 |
struct _Wrap_type \ |
|
|
2051 |
{ }; \ |
|
|
2052 |
\ |
|
|
2053 |
template \ |
|
|
2054 |
static __one __test(_Wrap_type*); \ |
|
|
2055 |
\ |
|
|
2056 |
template \ |
|
|
2057 |
static __two __test(...); \ |
|
|
2058 |
\ |
|
|
2059 |
public: \ |
|
|
2060 |
static constexpr bool value = sizeof(__test<_Tp>(0)) == 1; \ |
|
|
2061 |
}; \ |
|
|
2062 |
\ |
|
|
2063 |
template \ |
|
|
2064 |
struct __has_##_NTYPE \ |
|
|
2065 |
: integral_constant |
|
|
2066 |
::type>::value> \ |
|
|
2067 |
{ }; |
|
|
2068 |
|
|
|
2069 |
_GLIBCXX_END_NAMESPACE_VERSION |
|
|
2070 |
} // namespace std |
|
|
2071 |
|
|
|
2072 |
#endif // C++11 |
|
|
2073 |
|
|
|
2074 |
#endif // _GLIBCXX_TYPE_TRAITS |