basic_types.hpp

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00001 // -*- C++ -*-
00002 
00003 // Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the terms
00007 // of the GNU General Public License as published by the Free Software
00008 // Foundation; either version 3, or (at your option) any later
00009 // version.
00010 
00011 // This library is distributed in the hope that it will be useful, but
00012 // WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 // General Public License for more details.
00015 
00016 // Under Section 7 of GPL version 3, you are granted additional
00017 // permissions described in the GCC Runtime Library Exception, version
00018 // 3.1, as published by the Free Software Foundation.
00019 
00020 // You should have received a copy of the GNU General Public License and
00021 // a copy of the GCC Runtime Library Exception along with this program;
00022 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
00023 // <http://www.gnu.org/licenses/>.
00024 
00025 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
00026 
00027 // Permission to use, copy, modify, sell, and distribute this software
00028 // is hereby granted without fee, provided that the above copyright
00029 // notice appears in all copies, and that both that copyright notice
00030 // and this permission notice appear in supporting documentation. None
00031 // of the above authors, nor IBM Haifa Research Laboratories, make any
00032 // representation about the suitability of this software for any
00033 // purpose. It is provided "as is" without express or implied
00034 // warranty.
00035 
00036 /**
00037  * @file basic_types.hpp
00038  * Contains basic types used by containers.
00039  */
00040 
00041 #ifndef PB_DS_BASIC_TYPES_HPP
00042 #define PB_DS_BASIC_TYPES_HPP
00043 
00044 #include <algorithm>
00045 #include <utility>
00046 #include <ext/pb_ds/tag_and_trait.hpp>
00047 #include <ext/pb_ds/detail/type_utils.hpp>
00048 
00049 namespace __gnu_pbds
00050 {
00051   namespace detail
00052   {
00053     template<typename Key, typename Mapped, typename Allocator, bool Store_Hash>
00054     struct value_type_base;
00055 
00056     /**
00057      * Specialization of value_type_base for the case where the hash value
00058      * is not stored alongside each value.
00059      **/
00060     template<typename Key, typename Mapped, typename Allocator>
00061     struct value_type_base<Key, Mapped, Allocator, false>
00062     {
00063       typedef typename Allocator::template rebind<Mapped>::other mapped_type_allocator;
00064       typedef typename mapped_type_allocator::value_type mapped_type;
00065       typedef typename mapped_type_allocator::pointer mapped_pointer;
00066       typedef typename mapped_type_allocator::const_pointer const_mapped_pointer;
00067       typedef typename mapped_type_allocator::reference mapped_reference;
00068       typedef typename mapped_type_allocator::const_reference const_mapped_reference;
00069 
00070       typedef typename Allocator::template rebind<std::pair<const Key, Mapped> >::other value_type_allocator;
00071       typedef typename value_type_allocator::value_type value_type;
00072       typedef typename value_type_allocator::pointer pointer;
00073       typedef typename value_type_allocator::const_pointer const_pointer;
00074       typedef typename value_type_allocator::reference reference;
00075       typedef typename value_type_allocator::const_reference const_reference;
00076 
00077       struct stored_value_type
00078       {
00079     value_type m_value;
00080       };
00081     };
00082 
00083     /**
00084      * Specialization of value_type_base for the case where the hash value
00085      * is stored alongside each value.
00086      **/
00087     template<typename Key, typename Mapped, typename Allocator>
00088     struct value_type_base<Key, Mapped, Allocator, true>
00089     {
00090       typedef typename Allocator::template rebind<Mapped>::other mapped_type_allocator;
00091       typedef typename mapped_type_allocator::value_type mapped_type;
00092       typedef typename mapped_type_allocator::pointer mapped_pointer;
00093       typedef typename mapped_type_allocator::const_pointer const_mapped_pointer;
00094       typedef typename mapped_type_allocator::reference mapped_reference;
00095       typedef typename mapped_type_allocator::const_reference const_mapped_reference;
00096 
00097       typedef typename Allocator::template rebind<std::pair<const Key, Mapped> >::other value_type_allocator;
00098       typedef typename value_type_allocator::value_type value_type;
00099       typedef typename value_type_allocator::pointer pointer;
00100       typedef typename value_type_allocator::const_pointer const_pointer;
00101       typedef typename value_type_allocator::reference reference;
00102       typedef typename value_type_allocator::const_reference const_reference;
00103 
00104       struct stored_value_type
00105       {
00106     value_type m_value;
00107     typename Allocator::size_type m_hash;
00108       };
00109     };
00110 
00111 #define PB_DS_CLASS_T_DEC \
00112     template<typename Key, typename Allocator>
00113 
00114 #define PB_DS_CLASS_C_DEC \
00115     value_type_base<Key, null_mapped_type, Allocator, false>
00116 
00117     /**
00118      * Specialization of value_type_base for the case where the hash value
00119      * is not stored alongside each value.
00120      **/
00121     template<typename Key, typename Allocator>
00122     struct value_type_base<Key, null_mapped_type, Allocator, false>
00123     {
00124       typedef typename Allocator::template rebind<null_mapped_type>::other mapped_type_allocator;
00125       typedef typename mapped_type_allocator::value_type mapped_type;
00126       typedef typename mapped_type_allocator::pointer mapped_pointer;
00127       typedef typename mapped_type_allocator::const_pointer const_mapped_pointer;
00128       typedef typename mapped_type_allocator::reference mapped_reference;
00129       typedef typename mapped_type_allocator::const_reference const_mapped_reference;
00130 
00131       typedef Key value_type;
00132 
00133       typedef typename Allocator::template rebind<value_type>::other value_type_allocator;
00134       typedef typename value_type_allocator::pointer pointer;
00135       typedef typename value_type_allocator::const_pointer const_pointer;
00136       typedef typename value_type_allocator::reference reference;
00137       typedef typename value_type_allocator::const_reference const_reference;
00138 
00139       struct stored_value_type
00140       {
00141     value_type m_value;
00142       };
00143 
00144       static null_mapped_type s_null_mapped;
00145     };
00146 
00147     PB_DS_CLASS_T_DEC
00148     null_mapped_type PB_DS_CLASS_C_DEC::s_null_mapped;
00149 
00150 #undef PB_DS_CLASS_T_DEC
00151 #undef PB_DS_CLASS_C_DEC
00152 
00153 #define PB_DS_CLASS_T_DEC \
00154     template<typename Key, typename Allocator>
00155 
00156 #define PB_DS_CLASS_C_DEC \
00157     value_type_base<Key, null_mapped_type, Allocator, true>
00158 
00159     /**
00160      * Specialization of value_type_base for the case where the hash value
00161      * is stored alongside each value.
00162      **/
00163     template<typename Key, typename Allocator>
00164     struct value_type_base<Key, null_mapped_type, Allocator, true>
00165     {
00166       typedef typename Allocator::template rebind<null_mapped_type>::other mapped_type_allocator;
00167       typedef typename mapped_type_allocator::value_type mapped_type;
00168       typedef typename mapped_type_allocator::pointer mapped_pointer;
00169       typedef typename mapped_type_allocator::const_pointer const_mapped_pointer;
00170       typedef typename mapped_type_allocator::reference mapped_reference;
00171       typedef typename mapped_type_allocator::const_reference const_mapped_reference;
00172 
00173       typedef Key value_type;
00174 
00175       typedef typename Allocator::template rebind<value_type>::other value_type_allocator;
00176       typedef typename value_type_allocator::pointer pointer;
00177       typedef typename value_type_allocator::const_pointer const_pointer;
00178       typedef typename value_type_allocator::reference reference;
00179       typedef typename value_type_allocator::const_reference const_reference;
00180 
00181       struct stored_value_type
00182       {
00183     value_type m_value;
00184     typename Allocator::size_type m_hash;
00185       };
00186 
00187       static null_mapped_type s_null_mapped;
00188     };
00189 
00190     PB_DS_CLASS_T_DEC
00191     null_mapped_type PB_DS_CLASS_C_DEC::s_null_mapped;
00192 
00193 #undef PB_DS_CLASS_T_DEC
00194 #undef PB_DS_CLASS_C_DEC
00195 
00196     template<typename Key, typename Mapped>
00197     struct no_throw_copies
00198     {
00199       typedef integral_constant<int, is_simple<Key>::value && is_simple<Mapped>::value> indicator;
00200     };
00201 
00202     template<typename Key>
00203     struct no_throw_copies<Key, null_mapped_type>
00204     {
00205       typedef integral_constant<int, is_simple<Key>::value> indicator;
00206     };
00207   } // namespace detail
00208 } // namespace __gnu_pbds
00209 
00210 #endif 
00211 

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