1 // class template array -*- C++ -*- 2 3 // Copyright (C) 2004-2024 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 /** @file tr1/array 26 * This is a TR1 C++ Library header. 27 */ 28 29 #ifndef _GLIBCXX_TR1_ARRAY 30 #define _GLIBCXX_TR1_ARRAY 1 31 32 #pragma GCC system_header 33 34 #include <bits/requires_hosted.h> // TR1 35 36 #include <bits/stl_algobase.h> 37 38 namespace std _GLIBCXX_VISIBILITY(default) 39 { 40 _GLIBCXX_BEGIN_NAMESPACE_VERSION 41 42 namespace tr1 43 { 44 /** 45 * @brief A standard container for storing a fixed size sequence of elements. 46 * 47 * @ingroup sequences 48 * 49 * Meets the requirements of a <a href="tables.html#65">container</a>, a 50 * <a href="tables.html#66">reversible container</a>, and a 51 * <a href="tables.html#67">sequence</a>. 52 * 53 * Sets support random access iterators. 54 * 55 * @param Tp Type of element. Required to be a complete type. 56 * @param N Number of elements. 57 */ 58 template<typename _Tp, std::size_t _Nm> 59 struct array 60 { 61 typedef _Tp value_type; 62 typedef value_type& reference; 63 typedef const value_type& const_reference; 64 typedef value_type* iterator; 65 typedef const value_type* const_iterator; 66 typedef std::size_t size_type; 67 typedef std::ptrdiff_t difference_type; 68 typedef std::reverse_iterator<iterator> reverse_iterator; 69 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 70 71 // Support for zero-sized arrays mandatory. 72 value_type _M_instance[_Nm ? _Nm : 1]; 73 74 // No explicit construct/copy/destroy for aggregate type. 75 76 void 77 assign(const value_type& __u) 78 { std::fill_n(begin(), size(), __u); } 79 80 void 81 swap(array& __other) 82 { std::swap_ranges(begin(), end(), __other.begin()); } 83 84 // Iterators. 85 iterator 86 begin() 87 { return iterator(std::__addressof(_M_instance[0])); } 88 89 const_iterator 90 begin() const 91 { return const_iterator(std::__addressof(_M_instance[0])); } 92 93 iterator 94 end() 95 { return iterator(std::__addressof(_M_instance[_Nm])); } 96 97 const_iterator 98 end() const 99 { return const_iterator(std::__addressof(_M_instance[_Nm])); } 100 101 reverse_iterator 102 rbegin() 103 { return reverse_iterator(end()); } 104 105 const_reverse_iterator 106 rbegin() const 107 { return const_reverse_iterator(end()); } 108 109 reverse_iterator 110 rend() 111 { return reverse_iterator(begin()); } 112 113 const_reverse_iterator 114 rend() const 115 { return const_reverse_iterator(begin()); } 116 117 // Capacity. 118 size_type 119 size() const { return _Nm; } 120 121 size_type 122 max_size() const { return _Nm; } 123 124 _GLIBCXX_NODISCARD bool 125 empty() const { return size() == 0; } 126 127 // Element access. 128 reference 129 operator[](size_type __n) 130 { return _M_instance[__n]; } 131 132 const_reference 133 operator[](size_type __n) const 134 { return _M_instance[__n]; } 135 136 reference 137 at(size_type __n) 138 { 139 if (__n >= _Nm) 140 std::__throw_out_of_range(__N("array::at")); 141 return _M_instance[__n]; 142 } 143 144 const_reference 145 at(size_type __n) const 146 { 147 if (__n >= _Nm) 148 std::__throw_out_of_range(__N("array::at")); 149 return _M_instance[__n]; 150 } 151 152 reference 153 front() 154 { return *begin(); } 155 156 const_reference 157 front() const 158 { return *begin(); } 159 160 reference 161 back() 162 { return _Nm ? *(end() - 1) : *end(); } 163 164 const_reference 165 back() const 166 { return _Nm ? *(end() - 1) : *end(); } 167 168 _Tp* 169 data() 170 { return std::__addressof(_M_instance[0]); } 171 172 const _Tp* 173 data() const 174 { return std::__addressof(_M_instance[0]); } 175 }; 176 177 // Array comparisons. 178 template<typename _Tp, std::size_t _Nm> 179 inline bool 180 operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 181 { return std::equal(__one.begin(), __one.end(), __two.begin()); } 182 183 template<typename _Tp, std::size_t _Nm> 184 inline bool 185 operator!=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 186 { return !(__one == __two); } 187 188 template<typename _Tp, std::size_t _Nm> 189 inline bool 190 operator<(const array<_Tp, _Nm>& __a, const array<_Tp, _Nm>& __b) 191 { 192 return std::lexicographical_compare(__a.begin(), __a.end(), 193 __b.begin(), __b.end()); 194 } 195 196 template<typename _Tp, std::size_t _Nm> 197 inline bool 198 operator>(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 199 { return __two < __one; } 200 201 template<typename _Tp, std::size_t _Nm> 202 inline bool 203 operator<=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 204 { return !(__one > __two); } 205 206 template<typename _Tp, std::size_t _Nm> 207 inline bool 208 operator>=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) 209 { return !(__one < __two); } 210 211 // Specialized algorithms [6.2.2.2]. 212 template<typename _Tp, std::size_t _Nm> 213 inline void 214 swap(array<_Tp, _Nm>& __one, array<_Tp, _Nm>& __two) 215 { __one.swap(__two); } 216 217 // Tuple interface to class template array [6.2.2.5]. 218 219 /// tuple_size 220 template<typename _Tp> 221 class tuple_size; 222 223 /// tuple_element 224 template<int _Int, typename _Tp> 225 class tuple_element; 226 227 template<typename _Tp, std::size_t _Nm> 228 struct tuple_size<array<_Tp, _Nm> > 229 { static const int value = _Nm; }; 230 231 template<typename _Tp, std::size_t _Nm> 232 const int 233 tuple_size<array<_Tp, _Nm> >::value; 234 235 template<int _Int, typename _Tp, std::size_t _Nm> 236 struct tuple_element<_Int, array<_Tp, _Nm> > 237 { typedef _Tp type; }; 238 239 template<int _Int, typename _Tp, std::size_t _Nm> 240 inline _Tp& 241 get(array<_Tp, _Nm>& __arr) 242 { return __arr[_Int]; } 243 244 template<int _Int, typename _Tp, std::size_t _Nm> 245 inline const _Tp& 246 get(const array<_Tp, _Nm>& __arr) 247 { return __arr[_Int]; } 248 } 249 250 _GLIBCXX_END_NAMESPACE_VERSION 251 } 252 253 #endif // _GLIBCXX_TR1_ARRAY 254
Indexes created Sat Feb 28 05:31:39 UTC 2026