199 lines
6.3 KiB
C++
199 lines
6.3 KiB
C++
// -*- C++ -*-
|
|
|
|
// Copyright (C) 2005-2022 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library is free
|
|
// software; you can redistribute it and/or modify it under the terms
|
|
// of the GNU General Public License as published by the Free Software
|
|
// Foundation; either version 3, or (at your option) any later
|
|
// version.
|
|
|
|
// This library is distributed in the hope that it will be useful, but
|
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// General Public License for more details.
|
|
|
|
// Under Section 7 of GPL version 3, you are granted additional
|
|
// permissions described in the GCC Runtime Library Exception, version
|
|
// 3.1, as published by the Free Software Foundation.
|
|
|
|
// You should have received a copy of the GNU General Public License and
|
|
// a copy of the GCC Runtime Library Exception along with this program;
|
|
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
|
|
|
|
// Permission to use, copy, modify, sell, and distribute this software
|
|
// is hereby granted without fee, provided that the above copyright
|
|
// notice appears in all copies, and that both that copyright notice
|
|
// and this permission notice appear in supporting documentation. None
|
|
// of the above authors, nor IBM Haifa Research Laboratories, make any
|
|
// representation about the suitability of this software for any
|
|
// purpose. It is provided "as is" without express or implied
|
|
// warranty.
|
|
|
|
/**
|
|
* @file detail/types_traits.hpp
|
|
* Contains a traits class of types used by containers.
|
|
*/
|
|
|
|
#ifndef PB_DS_TYPES_TRAITS_HPP
|
|
#define PB_DS_TYPES_TRAITS_HPP
|
|
|
|
#include <algorithm>
|
|
#include <utility>
|
|
#include <ext/pb_ds/tag_and_trait.hpp>
|
|
#include <ext/pb_ds/detail/type_utils.hpp>
|
|
#include <memory>
|
|
|
|
namespace __gnu_pbds
|
|
{
|
|
namespace detail
|
|
{
|
|
/**
|
|
* @addtogroup traits Traits
|
|
* @{
|
|
*/
|
|
|
|
/// Primary template.
|
|
template<typename Key, typename Mapped>
|
|
struct no_throw_copies
|
|
{
|
|
static const bool __simple = is_simple<Key>::value
|
|
&& is_simple<Mapped>::value;
|
|
typedef integral_constant<int, __simple> indicator;
|
|
};
|
|
|
|
/// Specialization.
|
|
template<typename Key>
|
|
struct no_throw_copies<Key, null_type>
|
|
{
|
|
typedef integral_constant<int, is_simple<Key>::value> indicator;
|
|
};
|
|
|
|
|
|
/// Stored value.
|
|
template<typename _Tv>
|
|
struct stored_value
|
|
{
|
|
typedef _Tv value_type;
|
|
value_type m_value;
|
|
};
|
|
|
|
/// Stored hash.
|
|
template<typename _Th>
|
|
struct stored_hash
|
|
{
|
|
typedef _Th hash_type;
|
|
hash_type m_hash;
|
|
};
|
|
|
|
/// Primary template for representation of stored data.
|
|
/// Two types of data can be stored: value and hash.
|
|
template<typename _Tv, typename _Th, bool Store_Hash>
|
|
struct stored_data
|
|
: public stored_value<_Tv>, public stored_hash<_Th>
|
|
{ };
|
|
|
|
/// Specialization for representation of stored data of just value type.
|
|
template<typename _Tv, typename _Th>
|
|
struct stored_data<_Tv, _Th, false>
|
|
: public stored_value<_Tv>
|
|
{ };
|
|
|
|
/// Choose value_type to be a key/value pair or just a key.
|
|
template<typename Key, typename Mapped>
|
|
struct select_value_type
|
|
{
|
|
typedef std::pair<const Key, Mapped> type;
|
|
};
|
|
|
|
/// Specialization for sets where the key is the value_type.
|
|
template<typename Key>
|
|
struct select_value_type<Key, null_type>
|
|
{
|
|
typedef Key type;
|
|
};
|
|
|
|
/// Base class for conditionally defining a static data member.
|
|
template<typename Key, typename Mapped, typename _Alloc, bool Store_Hash>
|
|
struct maybe_null_type
|
|
{ };
|
|
|
|
/// Specialization that defines a static data member of type null_type.
|
|
template<typename Key,typename _Alloc, bool Store_Hash>
|
|
struct maybe_null_type<Key, null_type, _Alloc, Store_Hash>
|
|
{
|
|
static null_type s_null_type;
|
|
};
|
|
|
|
template<typename Key,typename _Alloc, bool Store_Hash>
|
|
null_type
|
|
maybe_null_type<Key, null_type, _Alloc, Store_Hash>::s_null_type;
|
|
|
|
/// Consistent API for accessing allocator-related types.
|
|
template<typename _Alloc, typename T>
|
|
struct rebind_traits
|
|
#if __cplusplus >= 201103L
|
|
: std::allocator_traits<_Alloc>::template rebind_traits<T>
|
|
{
|
|
using reference = T&;
|
|
using const_reference = const T&;
|
|
};
|
|
#else
|
|
: _Alloc::template rebind<T>::other
|
|
{
|
|
typedef typename _Alloc::template rebind<T>::other allocator_type;
|
|
};
|
|
#endif
|
|
|
|
|
|
/// Traits for abstract types.
|
|
template<typename Key, typename Mapped, typename _Alloc, bool Store_Hash>
|
|
struct types_traits
|
|
: public maybe_null_type<Key, Mapped, _Alloc, Store_Hash>
|
|
{
|
|
public:
|
|
typedef typename _Alloc::size_type size_type;
|
|
typedef typename select_value_type<Key, Mapped>::type value_type;
|
|
typedef Key key_type;
|
|
typedef Mapped mapped_type;
|
|
|
|
private:
|
|
typedef rebind_traits<_Alloc, value_type> __rebind_va;
|
|
typedef rebind_traits<_Alloc, key_type> __rebind_ka;
|
|
typedef rebind_traits<_Alloc, mapped_type> __rebind_ma;
|
|
|
|
typedef no_throw_copies<Key, Mapped> __nothrowcopy;
|
|
|
|
public:
|
|
typedef typename __rebind_ma::pointer mapped_pointer;
|
|
typedef typename __rebind_ma::const_pointer mapped_const_pointer;
|
|
typedef typename __rebind_ma::reference mapped_reference;
|
|
typedef typename __rebind_ma::const_reference mapped_const_reference;
|
|
|
|
typedef typename __rebind_va::pointer pointer;
|
|
typedef typename __rebind_va::const_pointer const_pointer;
|
|
typedef typename __rebind_va::reference reference;
|
|
typedef typename __rebind_va::const_reference const_reference;
|
|
|
|
typedef stored_data<value_type, size_type, Store_Hash> stored_data_type;
|
|
|
|
typedef typename __rebind_ka::pointer key_pointer;
|
|
typedef typename __rebind_ka::const_pointer key_const_pointer;
|
|
typedef typename __rebind_ka::reference key_reference;
|
|
typedef typename __rebind_ka::const_reference key_const_reference;
|
|
typedef std::pair<size_type, size_type> comp_hash;
|
|
typedef integral_constant<int, Store_Hash> store_extra;
|
|
typedef typename __nothrowcopy::indicator no_throw_indicator;
|
|
|
|
store_extra m_store_extra_indicator;
|
|
no_throw_indicator m_no_throw_copies_indicator;
|
|
};
|
|
///@}
|
|
} // namespace detail
|
|
} // namespace __gnu_pbds
|
|
|
|
#endif
|