168 lines
4.2 KiB
C++
168 lines
4.2 KiB
C++
// -*- C++ -*-
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// Copyright (C) 2005-2022 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 terms
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// of the GNU General Public License as published by the Free Software
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// Foundation; either version 3, or (at your option) any later
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// version.
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// 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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// <http://www.gnu.org/licenses/>.
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// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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// Permission to use, copy, modify, sell, and distribute this software
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// is hereby granted without fee, provided that the above copyright
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// notice appears in all copies, and that both that copyright notice
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// and this permission notice appear in supporting documentation. None
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// of the above authors, nor IBM Haifa Research Laboratories, make any
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// representation about the suitability of this software for any
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// purpose. It is provided "as is" without express or implied
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// warranty.
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/**
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* @file detail/type_utils.hpp
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* Contains utilities for handling types. All of these classes are based on
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* Modern C++ by Andrei Alxandrescu.
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*/
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#ifndef PB_DS_TYPE_UTILS_HPP
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#define PB_DS_TYPE_UTILS_HPP
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#include <cstddef>
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#include <utility>
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#include <tr1/type_traits>
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#include <ext/type_traits.h>
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#include <ext/numeric_traits.h>
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namespace __gnu_pbds
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{
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namespace detail
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{
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using std::tr1::is_same;
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using std::tr1::is_const;
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using std::tr1::is_pointer;
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using std::tr1::is_reference;
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using std::tr1::is_fundamental;
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using std::tr1::is_member_object_pointer;
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using std::tr1::is_member_pointer;
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using std::tr1::is_base_of;
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using std::tr1::remove_const;
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using std::tr1::remove_reference;
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// Need integral_const<bool, true> <-> integral_const<int, 1>, so
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// because of this use the following typedefs instead of importing
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// std::tr1's.
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using std::tr1::integral_constant;
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typedef std::tr1::integral_constant<int, 1> true_type;
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typedef std::tr1::integral_constant<int, 0> false_type;
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using __gnu_cxx::__conditional_type;
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using __gnu_cxx::__numeric_traits;
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template<typename T>
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struct is_const_pointer
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{
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enum
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{
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value = is_const<T>::value && is_pointer<T>::value
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};
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};
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template<typename T>
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struct is_const_reference
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{
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enum
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{
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value = is_const<T>::value && is_reference<T>::value
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};
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};
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template<typename T>
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struct is_simple
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{
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enum
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{
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value = is_fundamental<typename remove_const<T>::type>::value
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|| is_pointer<typename remove_const<T>::type>::value
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|| is_member_pointer<T>::value
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};
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};
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template<typename T>
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class is_pair
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{
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private:
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template<typename U>
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struct is_pair_imp
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{
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enum
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{
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value = 0
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};
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};
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template<typename U, typename V>
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struct is_pair_imp<std::pair<U,V> >
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{
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enum
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{
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value = 1
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};
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};
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public:
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enum
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{
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value = is_pair_imp<T>::value
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};
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};
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// Use C++11's static_assert if possible.
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#if __cplusplus >= 201103L
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#define PB_DS_STATIC_ASSERT(UNIQUE, E) static_assert(E, #UNIQUE)
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#else
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template<bool>
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struct __static_assert;
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template<>
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struct __static_assert<true>
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{ };
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template<int>
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struct __static_assert_dumclass
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{
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enum
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{
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v = 1
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};
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};
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#define PB_DS_STATIC_ASSERT(UNIQUE, E) \
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typedef __gnu_pbds::detail::__static_assert_dumclass<sizeof(__gnu_pbds::detail::__static_assert<bool(E)>)> UNIQUE##__static_assert_type
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#endif
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template<typename Type>
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struct type_to_type
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{
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typedef Type type;
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};
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} // namespace detail
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} // namespace __gnu_pbds
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#endif
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