libstdc++
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00001 // <array> -*- C++ -*- 00002 00003 // Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012 00004 // Free Software Foundation, Inc. 00005 // 00006 // This file is part of the GNU ISO C++ Library. This library is free 00007 // software; you can redistribute it and/or modify it under the 00008 // terms of the GNU General Public License as published by the 00009 // Free Software Foundation; either version 3, or (at your option) 00010 // any later version. 00011 00012 // This library is distributed in the hope that it will be useful, 00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 // GNU General Public License for more details. 00016 00017 // Under Section 7 of GPL version 3, you are granted additional 00018 // permissions described in the GCC Runtime Library Exception, version 00019 // 3.1, as published by the Free Software Foundation. 00020 00021 // You should have received a copy of the GNU General Public License and 00022 // a copy of the GCC Runtime Library Exception along with this program; 00023 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00024 // <http://www.gnu.org/licenses/>. 00025 00026 /** @file include/array 00027 * This is a Standard C++ Library header. 00028 */ 00029 00030 #ifndef _GLIBCXX_ARRAY 00031 #define _GLIBCXX_ARRAY 1 00032 00033 #pragma GCC system_header 00034 00035 #ifndef __GXX_EXPERIMENTAL_CXX0X__ 00036 # include <bits/c++0x_warning.h> 00037 #else 00038 00039 #include <stdexcept> 00040 #include <bits/stl_algobase.h> 00041 #include <bits/range_access.h> 00042 00043 namespace std _GLIBCXX_VISIBILITY(default) 00044 { 00045 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00046 00047 /** 00048 * @brief A standard container for storing a fixed size sequence of elements. 00049 * 00050 * @ingroup sequences 00051 * 00052 * Meets the requirements of a <a href="tables.html#65">container</a>, a 00053 * <a href="tables.html#66">reversible container</a>, and a 00054 * <a href="tables.html#67">sequence</a>. 00055 * 00056 * Sets support random access iterators. 00057 * 00058 * @param Tp Type of element. Required to be a complete type. 00059 * @param N Number of elements. 00060 */ 00061 template<typename _Tp, std::size_t _Nm> 00062 struct array 00063 { 00064 typedef _Tp value_type; 00065 typedef value_type* pointer; 00066 typedef const value_type* const_pointer; 00067 typedef value_type& reference; 00068 typedef const value_type& const_reference; 00069 typedef value_type* iterator; 00070 typedef const value_type* const_iterator; 00071 typedef std::size_t size_type; 00072 typedef std::ptrdiff_t difference_type; 00073 typedef std::reverse_iterator<iterator> reverse_iterator; 00074 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 00075 00076 // Support for zero-sized arrays mandatory. 00077 value_type _M_instance[_Nm ? _Nm : 1]; 00078 00079 // No explicit construct/copy/destroy for aggregate type. 00080 00081 // DR 776. 00082 void 00083 fill(const value_type& __u) 00084 { std::fill_n(begin(), size(), __u); } 00085 00086 void 00087 swap(array& __other) 00088 noexcept(noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))) 00089 { std::swap_ranges(begin(), end(), __other.begin()); } 00090 00091 // Iterators. 00092 iterator 00093 begin() noexcept 00094 { return iterator(data()); } 00095 00096 const_iterator 00097 begin() const noexcept 00098 { return const_iterator(data()); } 00099 00100 iterator 00101 end() noexcept 00102 { return iterator(data() + _Nm); } 00103 00104 const_iterator 00105 end() const noexcept 00106 { return const_iterator(data() + _Nm); } 00107 00108 reverse_iterator 00109 rbegin() noexcept 00110 { return reverse_iterator(end()); } 00111 00112 const_reverse_iterator 00113 rbegin() const noexcept 00114 { return const_reverse_iterator(end()); } 00115 00116 reverse_iterator 00117 rend() noexcept 00118 { return reverse_iterator(begin()); } 00119 00120 const_reverse_iterator 00121 rend() const noexcept 00122 { return const_reverse_iterator(begin()); } 00123 00124 const_iterator 00125 cbegin() const noexcept 00126 { return const_iterator(std::__addressof(_M_instance[0])); } 00127 00128 const_iterator 00129 cend() const noexcept 00130 { return const_iterator(std::__addressof(_M_instance[_Nm])); } 00131 00132 const_reverse_iterator 00133 crbegin() const noexcept 00134 { return const_reverse_iterator(end()); } 00135 00136 const_reverse_iterator 00137 crend() const noexcept 00138 { return const_reverse_iterator(begin()); } 00139 00140 // Capacity. 00141 constexpr size_type 00142 size() const noexcept { return _Nm; } 00143 00144 constexpr size_type 00145 max_size() const noexcept { return _Nm; } 00146 00147 constexpr bool 00148 empty() const noexcept { return size() == 0; } 00149 00150 // Element access. 00151 reference 00152 operator[](size_type __n) 00153 { return _M_instance[__n]; } 00154 00155 constexpr const_reference 00156 operator[](size_type __n) const noexcept 00157 { return _M_instance[__n]; } 00158 00159 reference 00160 at(size_type __n) 00161 { 00162 if (__n >= _Nm) 00163 std::__throw_out_of_range(__N("array::at")); 00164 return _M_instance[__n]; 00165 } 00166 00167 constexpr const_reference 00168 at(size_type __n) const 00169 { 00170 // Result of conditional expression must be an lvalue so use 00171 // boolean ? lvalue : (throw-expr, lvalue) 00172 return __n < _Nm ? _M_instance[__n] 00173 : (std::__throw_out_of_range(__N("array::at")), _M_instance[0]); 00174 } 00175 00176 reference 00177 front() 00178 { return *begin(); } 00179 00180 const_reference 00181 front() const 00182 { return *begin(); } 00183 00184 reference 00185 back() 00186 { return _Nm ? *(end() - 1) : *end(); } 00187 00188 const_reference 00189 back() const 00190 { return _Nm ? *(end() - 1) : *end(); } 00191 00192 pointer 00193 data() noexcept 00194 { return std::__addressof(_M_instance[0]); } 00195 00196 const_pointer 00197 data() const noexcept 00198 { return std::__addressof(_M_instance[0]); } 00199 }; 00200 00201 // Array comparisons. 00202 template<typename _Tp, std::size_t _Nm> 00203 inline bool 00204 operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 00205 { return std::equal(__one.begin(), __one.end(), __two.begin()); } 00206 00207 template<typename _Tp, std::size_t _Nm> 00208 inline bool 00209 operator!=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 00210 { return !(__one == __two); } 00211 00212 template<typename _Tp, std::size_t _Nm> 00213 inline bool 00214 operator<(const array<_Tp, _Nm>& __a, const array<_Tp, _Nm>& __b) 00215 { 00216 return std::lexicographical_compare(__a.begin(), __a.end(), 00217 __b.begin(), __b.end()); 00218 } 00219 00220 template<typename _Tp, std::size_t _Nm> 00221 inline bool 00222 operator>(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 00223 { return __two < __one; } 00224 00225 template<typename _Tp, std::size_t _Nm> 00226 inline bool 00227 operator<=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 00228 { return !(__one > __two); } 00229 00230 template<typename _Tp, std::size_t _Nm> 00231 inline bool 00232 operator>=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 00233 { return !(__one < __two); } 00234 00235 // Specialized algorithms. 00236 template<typename _Tp, std::size_t _Nm> 00237 inline void 00238 swap(array<_Tp, _Nm>& __one, array<_Tp, _Nm>& __two) 00239 noexcept(noexcept(__one.swap(__two))) 00240 { __one.swap(__two); } 00241 00242 // Tuple interface to class template array. 00243 00244 /// tuple_size 00245 template<typename _Tp> 00246 class tuple_size; 00247 00248 template<typename _Tp, std::size_t _Nm> 00249 struct tuple_size<array<_Tp, _Nm>> 00250 : public integral_constant<std::size_t, _Nm> { }; 00251 00252 /// tuple_element 00253 template<std::size_t _Int, typename _Tp> 00254 class tuple_element; 00255 00256 template<std::size_t _Int, typename _Tp, std::size_t _Nm> 00257 struct tuple_element<_Int, array<_Tp, _Nm> > 00258 { typedef _Tp type; }; 00259 00260 template<std::size_t _Int, typename _Tp, std::size_t _Nm> 00261 constexpr _Tp& 00262 get(array<_Tp, _Nm>& __arr) noexcept 00263 { return __arr._M_instance[_Int]; } 00264 00265 template<std::size_t _Int, typename _Tp, std::size_t _Nm> 00266 constexpr _Tp&& 00267 get(array<_Tp, _Nm>&& __arr) noexcept 00268 { return std::move(get<_Int>(__arr)); } 00269 00270 template<std::size_t _Int, typename _Tp, std::size_t _Nm> 00271 constexpr const _Tp& 00272 get(const array<_Tp, _Nm>& __arr) noexcept 00273 { return __arr._M_instance[_Int]; } 00274 00275 _GLIBCXX_END_NAMESPACE_VERSION 00276 } // namespace 00277 00278 #endif // __GXX_EXPERIMENTAL_CXX0X__ 00279 00280 #endif // _GLIBCXX_ARRAY