Maxim Integrated / MaximInterface

Device interface library for multiple platforms including Mbed.

Dependents:   DeepCover Embedded Security in IoT MaximInterface MAXREFDES155#

Maxim Interface is a library framework focused on providing flexible and expressive hardware interfaces. Both communication interfaces such as I2C and 1-Wire and device interfaces such as DS18B20 are supported. Modern C++ concepts are used extensively while keeping compatibility with C++98/C++03 and requiring no external dependencies. The embedded-friendly design does not depend on exceptions or RTTI.

The full version of the project is hosted on GitLab: https://gitlab.com/iabenz/MaximInterface

MaximInterfaceCore/span.hpp@7:9cd16581b578, 2019-07-22 (annotated)

Committer:
IanBenzMaxim
Date:
Mon Jul 22 11:44:07 2019 -0500
Revision:
7:9cd16581b578
Child:
8:5ea891c7d1a1
Updated to version 1.9.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
IanBenzMaxim 7:9cd16581b578 1 /*******************************************************************************
IanBenzMaxim 7:9cd16581b578 2 * Copyright (C) 2018 Maxim Integrated Products, Inc., All Rights Reserved.
IanBenzMaxim 7:9cd16581b578 3 *
IanBenzMaxim 7:9cd16581b578 4 * Permission is hereby granted, free of charge, to any person obtaining a
IanBenzMaxim 7:9cd16581b578 5 * copy of this software and associated documentation files (the "Software"),
IanBenzMaxim 7:9cd16581b578 6 * to deal in the Software without restriction, including without limitation
IanBenzMaxim 7:9cd16581b578 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
IanBenzMaxim 7:9cd16581b578 8 * and/or sell copies of the Software, and to permit persons to whom the
IanBenzMaxim 7:9cd16581b578 9 * Software is furnished to do so, subject to the following conditions:
IanBenzMaxim 7:9cd16581b578 10 *
IanBenzMaxim 7:9cd16581b578 11 * The above copyright notice and this permission notice shall be included
IanBenzMaxim 7:9cd16581b578 12 * in all copies or substantial portions of the Software.
IanBenzMaxim 7:9cd16581b578 13 *
IanBenzMaxim 7:9cd16581b578 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
IanBenzMaxim 7:9cd16581b578 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
IanBenzMaxim 7:9cd16581b578 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IanBenzMaxim 7:9cd16581b578 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
IanBenzMaxim 7:9cd16581b578 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
IanBenzMaxim 7:9cd16581b578 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
IanBenzMaxim 7:9cd16581b578 20 * OTHER DEALINGS IN THE SOFTWARE.
IanBenzMaxim 7:9cd16581b578 21 *
IanBenzMaxim 7:9cd16581b578 22 * Except as contained in this notice, the name of Maxim Integrated
IanBenzMaxim 7:9cd16581b578 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
IanBenzMaxim 7:9cd16581b578 24 * Products, Inc. Branding Policy.
IanBenzMaxim 7:9cd16581b578 25 *
IanBenzMaxim 7:9cd16581b578 26 * The mere transfer of this software does not imply any licenses
IanBenzMaxim 7:9cd16581b578 27 * of trade secrets, proprietary technology, copyrights, patents,
IanBenzMaxim 7:9cd16581b578 28 * trademarks, maskwork rights, or any other form of intellectual
IanBenzMaxim 7:9cd16581b578 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
IanBenzMaxim 7:9cd16581b578 30 * ownership rights.
IanBenzMaxim 7:9cd16581b578 31 *******************************************************************************/
IanBenzMaxim 7:9cd16581b578 32
IanBenzMaxim 7:9cd16581b578 33 #ifndef MaximInterfaceCore_span
IanBenzMaxim 7:9cd16581b578 34 #define MaximInterfaceCore_span
IanBenzMaxim 7:9cd16581b578 35
IanBenzMaxim 7:9cd16581b578 36 #include <stddef.h>
IanBenzMaxim 7:9cd16581b578 37 #include <stdint.h>
IanBenzMaxim 7:9cd16581b578 38 #include <iterator>
IanBenzMaxim 7:9cd16581b578 39 #include <vector>
IanBenzMaxim 7:9cd16581b578 40 #include "array.hpp"
IanBenzMaxim 7:9cd16581b578 41 #include "type_traits.hpp"
IanBenzMaxim 7:9cd16581b578 42
IanBenzMaxim 7:9cd16581b578 43 namespace MaximInterfaceCore {
IanBenzMaxim 7:9cd16581b578 44
IanBenzMaxim 7:9cd16581b578 45 /// Differentiates spans of static and dynamic extent.
IanBenzMaxim 7:9cd16581b578 46 static const size_t dynamic_extent = SIZE_MAX;
IanBenzMaxim 7:9cd16581b578 47
IanBenzMaxim 7:9cd16581b578 48 /// @brief
IanBenzMaxim 7:9cd16581b578 49 /// Generic memory span class similar to gsl::span and the proposed std::span.
IanBenzMaxim 7:9cd16581b578 50 /// @note
IanBenzMaxim 7:9cd16581b578 51 /// Separate implementations are used for spans of static and dynamic extent.
IanBenzMaxim 7:9cd16581b578 52 template <typename T, size_t Extent = dynamic_extent> class span;
IanBenzMaxim 7:9cd16581b578 53
IanBenzMaxim 7:9cd16581b578 54 namespace detail {
IanBenzMaxim 7:9cd16581b578 55
IanBenzMaxim 7:9cd16581b578 56 // Implementation of common span functionality using CRTP.
IanBenzMaxim 7:9cd16581b578 57 template <template <typename, size_t = MaximInterfaceCore::dynamic_extent>
IanBenzMaxim 7:9cd16581b578 58 class span,
IanBenzMaxim 7:9cd16581b578 59 typename T, size_t Extent>
IanBenzMaxim 7:9cd16581b578 60 class span_base {
IanBenzMaxim 7:9cd16581b578 61 public:
IanBenzMaxim 7:9cd16581b578 62 typedef T element_type;
IanBenzMaxim 7:9cd16581b578 63 typedef typename remove_cv<element_type>::type value_type;
IanBenzMaxim 7:9cd16581b578 64 typedef size_t index_type;
IanBenzMaxim 7:9cd16581b578 65 typedef ptrdiff_t difference_type;
IanBenzMaxim 7:9cd16581b578 66 typedef element_type * pointer;
IanBenzMaxim 7:9cd16581b578 67 typedef const element_type * const_pointer;
IanBenzMaxim 7:9cd16581b578 68 typedef element_type & reference;
IanBenzMaxim 7:9cd16581b578 69 typedef const element_type & const_reference;
IanBenzMaxim 7:9cd16581b578 70 typedef element_type * iterator;
IanBenzMaxim 7:9cd16581b578 71 typedef const element_type * const_iterator;
IanBenzMaxim 7:9cd16581b578 72 typedef std::reverse_iterator<iterator> reverse_iterator;
IanBenzMaxim 7:9cd16581b578 73 typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
IanBenzMaxim 7:9cd16581b578 74
IanBenzMaxim 7:9cd16581b578 75 static const index_type extent = Extent;
IanBenzMaxim 7:9cd16581b578 76
IanBenzMaxim 7:9cd16581b578 77 protected:
IanBenzMaxim 7:9cd16581b578 78 span_base(pointer data) : data_(data) {}
IanBenzMaxim 7:9cd16581b578 79 ~span_base() {}
IanBenzMaxim 7:9cd16581b578 80
IanBenzMaxim 7:9cd16581b578 81 public:
IanBenzMaxim 7:9cd16581b578 82 /// @name Iterators
IanBenzMaxim 7:9cd16581b578 83 /// @{
IanBenzMaxim 7:9cd16581b578 84
IanBenzMaxim 7:9cd16581b578 85 iterator begin() const {
IanBenzMaxim 7:9cd16581b578 86 return const_cast<iterator>(static_cast<const span_base &>(*this).cbegin());
IanBenzMaxim 7:9cd16581b578 87 }
IanBenzMaxim 7:9cd16581b578 88
IanBenzMaxim 7:9cd16581b578 89 const_iterator cbegin() const { return data(); }
IanBenzMaxim 7:9cd16581b578 90
IanBenzMaxim 7:9cd16581b578 91 iterator end() const {
IanBenzMaxim 7:9cd16581b578 92 return const_cast<iterator>(static_cast<const span_base &>(*this).cend());
IanBenzMaxim 7:9cd16581b578 93 }
IanBenzMaxim 7:9cd16581b578 94
IanBenzMaxim 7:9cd16581b578 95 const_iterator cend() const { return cbegin() + size(); }
IanBenzMaxim 7:9cd16581b578 96
IanBenzMaxim 7:9cd16581b578 97 reverse_iterator rbegin() const { return reverse_iterator(end()); }
IanBenzMaxim 7:9cd16581b578 98
IanBenzMaxim 7:9cd16581b578 99 const_reverse_iterator crbegin() const {
IanBenzMaxim 7:9cd16581b578 100 return const_reverse_iterator(cend());
IanBenzMaxim 7:9cd16581b578 101 }
IanBenzMaxim 7:9cd16581b578 102
IanBenzMaxim 7:9cd16581b578 103 reverse_iterator rend() const { return reverse_iterator(begin()); }
IanBenzMaxim 7:9cd16581b578 104
IanBenzMaxim 7:9cd16581b578 105 const_reverse_iterator crend() const {
IanBenzMaxim 7:9cd16581b578 106 return const_reverse_iterator(cbegin());
IanBenzMaxim 7:9cd16581b578 107 }
IanBenzMaxim 7:9cd16581b578 108
IanBenzMaxim 7:9cd16581b578 109 /// @}
IanBenzMaxim 7:9cd16581b578 110
IanBenzMaxim 7:9cd16581b578 111 /// @name Element access
IanBenzMaxim 7:9cd16581b578 112 /// @{
IanBenzMaxim 7:9cd16581b578 113
IanBenzMaxim 7:9cd16581b578 114 reference front() const { return operator[](0); }
IanBenzMaxim 7:9cd16581b578 115
IanBenzMaxim 7:9cd16581b578 116 reference back() const { return operator[](size() - 1); }
IanBenzMaxim 7:9cd16581b578 117
IanBenzMaxim 7:9cd16581b578 118 reference operator[](index_type idx) const { return data()[idx]; }
IanBenzMaxim 7:9cd16581b578 119
IanBenzMaxim 7:9cd16581b578 120 pointer data() const { return data_; }
IanBenzMaxim 7:9cd16581b578 121
IanBenzMaxim 7:9cd16581b578 122 /// @}
IanBenzMaxim 7:9cd16581b578 123
IanBenzMaxim 7:9cd16581b578 124 /// @name Subviews
IanBenzMaxim 7:9cd16581b578 125 /// @{
IanBenzMaxim 7:9cd16581b578 126
IanBenzMaxim 7:9cd16581b578 127 template <index_type Count> span<element_type, Count> first() const {
IanBenzMaxim 7:9cd16581b578 128 return subspan<0, Count>();
IanBenzMaxim 7:9cd16581b578 129 }
IanBenzMaxim 7:9cd16581b578 130
IanBenzMaxim 7:9cd16581b578 131 span<element_type> first(index_type Count) const { return subspan(0, Count); }
IanBenzMaxim 7:9cd16581b578 132
IanBenzMaxim 7:9cd16581b578 133 span<element_type> last(index_type Count) const {
IanBenzMaxim 7:9cd16581b578 134 return subspan(size() - Count, Count);
IanBenzMaxim 7:9cd16581b578 135 }
IanBenzMaxim 7:9cd16581b578 136
IanBenzMaxim 7:9cd16581b578 137 template <index_type Offset, index_type Count>
IanBenzMaxim 7:9cd16581b578 138 span<element_type, Count> subspan() const {
IanBenzMaxim 7:9cd16581b578 139 return span<element_type, Count>(data() + Offset, Count);
IanBenzMaxim 7:9cd16581b578 140 }
IanBenzMaxim 7:9cd16581b578 141
IanBenzMaxim 7:9cd16581b578 142 span<element_type> subspan(index_type Offset,
IanBenzMaxim 7:9cd16581b578 143 index_type Count = dynamic_extent) const {
IanBenzMaxim 7:9cd16581b578 144 return span<element_type>(
IanBenzMaxim 7:9cd16581b578 145 data() + Offset, Count == dynamic_extent ? size() - Offset : Count);
IanBenzMaxim 7:9cd16581b578 146 }
IanBenzMaxim 7:9cd16581b578 147
IanBenzMaxim 7:9cd16581b578 148 /// @}
IanBenzMaxim 7:9cd16581b578 149
IanBenzMaxim 7:9cd16581b578 150 private:
IanBenzMaxim 7:9cd16581b578 151 index_type size() const {
IanBenzMaxim 7:9cd16581b578 152 return static_cast<const span<T, Extent> &>(*this).size();
IanBenzMaxim 7:9cd16581b578 153 }
IanBenzMaxim 7:9cd16581b578 154
IanBenzMaxim 7:9cd16581b578 155 pointer data_;
IanBenzMaxim 7:9cd16581b578 156 };
IanBenzMaxim 7:9cd16581b578 157
IanBenzMaxim 7:9cd16581b578 158 template <typename T> struct is_array : false_type {};
IanBenzMaxim 7:9cd16581b578 159
IanBenzMaxim 7:9cd16581b578 160 template <typename T> struct is_array<T[]> : true_type {};
IanBenzMaxim 7:9cd16581b578 161
IanBenzMaxim 7:9cd16581b578 162 template <typename T, size_t N> struct is_array<T[N]> : true_type {};
IanBenzMaxim 7:9cd16581b578 163
IanBenzMaxim 7:9cd16581b578 164 template <typename T> struct is_array_class_helper : false_type {};
IanBenzMaxim 7:9cd16581b578 165
IanBenzMaxim 7:9cd16581b578 166 template <typename T, size_t N>
IanBenzMaxim 7:9cd16581b578 167 struct is_array_class_helper<array<T, N> > : true_type {};
IanBenzMaxim 7:9cd16581b578 168
IanBenzMaxim 7:9cd16581b578 169 template <typename T>
IanBenzMaxim 7:9cd16581b578 170 struct is_array_class : is_array_class_helper<typename remove_cv<T>::type> {};
IanBenzMaxim 7:9cd16581b578 171
IanBenzMaxim 7:9cd16581b578 172 template <typename T> struct is_span_helper : false_type {};
IanBenzMaxim 7:9cd16581b578 173
IanBenzMaxim 7:9cd16581b578 174 template <typename T, size_t Extent>
IanBenzMaxim 7:9cd16581b578 175 struct is_span_helper<span<T, Extent> > : true_type {};
IanBenzMaxim 7:9cd16581b578 176
IanBenzMaxim 7:9cd16581b578 177 template <typename T>
IanBenzMaxim 7:9cd16581b578 178 struct is_span : is_span_helper<typename remove_cv<T>::type> {};
IanBenzMaxim 7:9cd16581b578 179
IanBenzMaxim 7:9cd16581b578 180 template <typename T> struct is_vector_helper : false_type {};
IanBenzMaxim 7:9cd16581b578 181
IanBenzMaxim 7:9cd16581b578 182 template <typename T, typename Allocator>
IanBenzMaxim 7:9cd16581b578 183 struct is_vector_helper<std::vector<T, Allocator> > : true_type {};
IanBenzMaxim 7:9cd16581b578 184
IanBenzMaxim 7:9cd16581b578 185 template <typename T>
IanBenzMaxim 7:9cd16581b578 186 struct is_vector : is_vector_helper<typename remove_cv<T>::type> {};
IanBenzMaxim 7:9cd16581b578 187
IanBenzMaxim 7:9cd16581b578 188 // Used by the static extent span to disable the container constructors.
IanBenzMaxim 7:9cd16581b578 189 template <typename T>
IanBenzMaxim 7:9cd16581b578 190 struct enable_if_static_extent_convertible
IanBenzMaxim 7:9cd16581b578 191 : enable_if<!(is_array<T>::value || is_array_class<T>::value ||
IanBenzMaxim 7:9cd16581b578 192 is_span<T>::value || is_vector<T>::value)> {};
IanBenzMaxim 7:9cd16581b578 193
IanBenzMaxim 7:9cd16581b578 194 // Used by the dynamic extent span to disable the container constructors.
IanBenzMaxim 7:9cd16581b578 195 template <typename T>
IanBenzMaxim 7:9cd16581b578 196 struct enable_if_dynamic_extent_convertible
IanBenzMaxim 7:9cd16581b578 197 : enable_if<!(is_array<T>::value || is_span<T>::value ||
IanBenzMaxim 7:9cd16581b578 198 is_vector<T>::value)> {};
IanBenzMaxim 7:9cd16581b578 199
IanBenzMaxim 7:9cd16581b578 200 } // namespace detail
IanBenzMaxim 7:9cd16581b578 201
IanBenzMaxim 7:9cd16581b578 202 // Implementation of the static extent span.
IanBenzMaxim 7:9cd16581b578 203 template <typename T, size_t Extent>
IanBenzMaxim 7:9cd16581b578 204 class span : public detail::span_base<MaximInterfaceCore::span, T, Extent> {
IanBenzMaxim 7:9cd16581b578 205 typedef detail::span_base<MaximInterfaceCore::span, T, Extent> span_base;
IanBenzMaxim 7:9cd16581b578 206
IanBenzMaxim 7:9cd16581b578 207 public:
IanBenzMaxim 7:9cd16581b578 208 using span_base::extent;
IanBenzMaxim 7:9cd16581b578 209 using typename span_base::element_type;
IanBenzMaxim 7:9cd16581b578 210 using typename span_base::index_type;
IanBenzMaxim 7:9cd16581b578 211 using typename span_base::pointer;
IanBenzMaxim 7:9cd16581b578 212 using typename span_base::value_type;
IanBenzMaxim 7:9cd16581b578 213
IanBenzMaxim 7:9cd16581b578 214 span(pointer data, index_type) : span_base(data) {}
IanBenzMaxim 7:9cd16581b578 215
IanBenzMaxim 7:9cd16581b578 216 span(pointer begin, pointer) : span_base(begin) {}
IanBenzMaxim 7:9cd16581b578 217
IanBenzMaxim 7:9cd16581b578 218 span(element_type (&arr)[extent]) : span_base(arr) {}
IanBenzMaxim 7:9cd16581b578 219
IanBenzMaxim 7:9cd16581b578 220 span(array<value_type, extent> & arr) : span_base(arr.data()) {}
IanBenzMaxim 7:9cd16581b578 221
IanBenzMaxim 7:9cd16581b578 222 span(const array<value_type, extent> & arr) : span_base(arr.data()) {}
IanBenzMaxim 7:9cd16581b578 223
IanBenzMaxim 7:9cd16581b578 224 template <typename U> span(const span<U, extent> & s) : span_base(s.data()) {}
IanBenzMaxim 7:9cd16581b578 225
IanBenzMaxim 7:9cd16581b578 226 template <typename Allocator>
IanBenzMaxim 7:9cd16581b578 227 span(std::vector<value_type, Allocator> & vec) : span_base(&vec.front()) {}
IanBenzMaxim 7:9cd16581b578 228
IanBenzMaxim 7:9cd16581b578 229 template <typename Allocator>
IanBenzMaxim 7:9cd16581b578 230 span(const std::vector<value_type, Allocator> & vec)
IanBenzMaxim 7:9cd16581b578 231 : span_base(&vec.front()) {}
IanBenzMaxim 7:9cd16581b578 232
IanBenzMaxim 7:9cd16581b578 233 template <typename Container>
IanBenzMaxim 7:9cd16581b578 234 span(Container & cont,
IanBenzMaxim 7:9cd16581b578 235 typename detail::enable_if_static_extent_convertible<Container>::type * =
IanBenzMaxim 7:9cd16581b578 236 NULL)
IanBenzMaxim 7:9cd16581b578 237 : span_base(cont.data()) {}
IanBenzMaxim 7:9cd16581b578 238
IanBenzMaxim 7:9cd16581b578 239 template <typename Container>
IanBenzMaxim 7:9cd16581b578 240 span(const Container & cont,
IanBenzMaxim 7:9cd16581b578 241 typename detail::enable_if_static_extent_convertible<Container>::type * =
IanBenzMaxim 7:9cd16581b578 242 NULL)
IanBenzMaxim 7:9cd16581b578 243 : span_base(cont.data()) {}
IanBenzMaxim 7:9cd16581b578 244
IanBenzMaxim 7:9cd16581b578 245 /// @name Observers
IanBenzMaxim 7:9cd16581b578 246 /// @{
IanBenzMaxim 7:9cd16581b578 247
IanBenzMaxim 7:9cd16581b578 248 static index_type size() { return extent; }
IanBenzMaxim 7:9cd16581b578 249
IanBenzMaxim 7:9cd16581b578 250 static index_type size_bytes() { return size() * sizeof(element_type); }
IanBenzMaxim 7:9cd16581b578 251
IanBenzMaxim 7:9cd16581b578 252 static bool empty() { return size() == 0; }
IanBenzMaxim 7:9cd16581b578 253
IanBenzMaxim 7:9cd16581b578 254 /// @}
IanBenzMaxim 7:9cd16581b578 255
IanBenzMaxim 7:9cd16581b578 256 /// @name Subviews
IanBenzMaxim 7:9cd16581b578 257 /// @{
IanBenzMaxim 7:9cd16581b578 258
IanBenzMaxim 7:9cd16581b578 259 template <index_type Count> span<element_type, Count> last() const {
IanBenzMaxim 7:9cd16581b578 260 return this->template subspan<extent - Count, Count>();
IanBenzMaxim 7:9cd16581b578 261 }
IanBenzMaxim 7:9cd16581b578 262
IanBenzMaxim 7:9cd16581b578 263 /// @}
IanBenzMaxim 7:9cd16581b578 264 };
IanBenzMaxim 7:9cd16581b578 265
IanBenzMaxim 7:9cd16581b578 266 // Implementation of the dynamic extent span.
IanBenzMaxim 7:9cd16581b578 267 template <typename T>
IanBenzMaxim 7:9cd16581b578 268 class span<T, dynamic_extent>
IanBenzMaxim 7:9cd16581b578 269 : public detail::span_base<MaximInterfaceCore::span, T, dynamic_extent> {
IanBenzMaxim 7:9cd16581b578 270 typedef detail::span_base<MaximInterfaceCore::span, T, dynamic_extent>
IanBenzMaxim 7:9cd16581b578 271 span_base;
IanBenzMaxim 7:9cd16581b578 272
IanBenzMaxim 7:9cd16581b578 273 public:
IanBenzMaxim 7:9cd16581b578 274 using typename span_base::element_type;
IanBenzMaxim 7:9cd16581b578 275 using typename span_base::index_type;
IanBenzMaxim 7:9cd16581b578 276 using typename span_base::pointer;
IanBenzMaxim 7:9cd16581b578 277 using typename span_base::value_type;
IanBenzMaxim 7:9cd16581b578 278
IanBenzMaxim 7:9cd16581b578 279 span() : span_base(NULL), size_(0) {}
IanBenzMaxim 7:9cd16581b578 280
IanBenzMaxim 7:9cd16581b578 281 span(pointer data, index_type size) : span_base(data), size_(size) {}
IanBenzMaxim 7:9cd16581b578 282
IanBenzMaxim 7:9cd16581b578 283 span(pointer begin, pointer end) : span_base(begin), size_(end - begin) {}
IanBenzMaxim 7:9cd16581b578 284
IanBenzMaxim 7:9cd16581b578 285 template <size_t N> span(element_type (&arr)[N]) : span_base(arr), size_(N) {}
IanBenzMaxim 7:9cd16581b578 286
IanBenzMaxim 7:9cd16581b578 287 template <typename U, size_t N>
IanBenzMaxim 7:9cd16581b578 288 span(const span<U, N> & s) : span_base(s.data()), size_(s.size()) {}
IanBenzMaxim 7:9cd16581b578 289
IanBenzMaxim 7:9cd16581b578 290 template <typename Allocator>
IanBenzMaxim 7:9cd16581b578 291 span(std::vector<value_type, Allocator> & vec)
IanBenzMaxim 7:9cd16581b578 292 : span_base(vec.empty() ? NULL : &vec.front()), size_(vec.size()) {}
IanBenzMaxim 7:9cd16581b578 293
IanBenzMaxim 7:9cd16581b578 294 template <typename Allocator>
IanBenzMaxim 7:9cd16581b578 295 span(const std::vector<value_type, Allocator> & vec)
IanBenzMaxim 7:9cd16581b578 296 : span_base(vec.empty() ? NULL : &vec.front()), size_(vec.size()) {}
IanBenzMaxim 7:9cd16581b578 297
IanBenzMaxim 7:9cd16581b578 298 template <typename Container>
IanBenzMaxim 7:9cd16581b578 299 span(
IanBenzMaxim 7:9cd16581b578 300 Container & cont,
IanBenzMaxim 7:9cd16581b578 301 typename detail::enable_if_dynamic_extent_convertible<Container>::type * =
IanBenzMaxim 7:9cd16581b578 302 NULL)
IanBenzMaxim 7:9cd16581b578 303 : span_base(cont.data()), size_(cont.size()) {}
IanBenzMaxim 7:9cd16581b578 304
IanBenzMaxim 7:9cd16581b578 305 template <typename Container>
IanBenzMaxim 7:9cd16581b578 306 span(
IanBenzMaxim 7:9cd16581b578 307 const Container & cont,
IanBenzMaxim 7:9cd16581b578 308 typename detail::enable_if_dynamic_extent_convertible<Container>::type * =
IanBenzMaxim 7:9cd16581b578 309 NULL)
IanBenzMaxim 7:9cd16581b578 310 : span_base(cont.data()), size_(cont.size()) {}
IanBenzMaxim 7:9cd16581b578 311
IanBenzMaxim 7:9cd16581b578 312 /// @name Observers
IanBenzMaxim 7:9cd16581b578 313 /// @{
IanBenzMaxim 7:9cd16581b578 314
IanBenzMaxim 7:9cd16581b578 315 index_type size() const { return size_; }
IanBenzMaxim 7:9cd16581b578 316
IanBenzMaxim 7:9cd16581b578 317 index_type size_bytes() const { return size() * sizeof(element_type); }
IanBenzMaxim 7:9cd16581b578 318
IanBenzMaxim 7:9cd16581b578 319 bool empty() const { return size() == 0; }
IanBenzMaxim 7:9cd16581b578 320
IanBenzMaxim 7:9cd16581b578 321 /// @}
IanBenzMaxim 7:9cd16581b578 322
IanBenzMaxim 7:9cd16581b578 323 /// @name Subviews
IanBenzMaxim 7:9cd16581b578 324 /// @{
IanBenzMaxim 7:9cd16581b578 325
IanBenzMaxim 7:9cd16581b578 326 template <index_type Count> span<element_type, Count> last() const {
IanBenzMaxim 7:9cd16581b578 327 return span<element_type, Count>(this->data() + (size() - Count), Count);
IanBenzMaxim 7:9cd16581b578 328 }
IanBenzMaxim 7:9cd16581b578 329
IanBenzMaxim 7:9cd16581b578 330 /// @}
IanBenzMaxim 7:9cd16581b578 331
IanBenzMaxim 7:9cd16581b578 332 private:
IanBenzMaxim 7:9cd16581b578 333 index_type size_;
IanBenzMaxim 7:9cd16581b578 334 };
IanBenzMaxim 7:9cd16581b578 335
IanBenzMaxim 7:9cd16581b578 336 template <typename T>
IanBenzMaxim 7:9cd16581b578 337 span<T> make_span(T * data, typename span<T>::index_type size) {
IanBenzMaxim 7:9cd16581b578 338 return span<T>(data, size);
IanBenzMaxim 7:9cd16581b578 339 }
IanBenzMaxim 7:9cd16581b578 340
IanBenzMaxim 7:9cd16581b578 341 template <typename T> span<T> make_span(T * begin, T * end) {
IanBenzMaxim 7:9cd16581b578 342 return span<T>(begin, end);
IanBenzMaxim 7:9cd16581b578 343 }
IanBenzMaxim 7:9cd16581b578 344
IanBenzMaxim 7:9cd16581b578 345 template <typename T, size_t N> span<T, N> make_span(T (&arr)[N]) {
IanBenzMaxim 7:9cd16581b578 346 return span<T, N>(arr);
IanBenzMaxim 7:9cd16581b578 347 }
IanBenzMaxim 7:9cd16581b578 348
IanBenzMaxim 7:9cd16581b578 349 template <typename T, size_t N> span<T, N> make_span(array<T, N> & arr) {
IanBenzMaxim 7:9cd16581b578 350 return arr;
IanBenzMaxim 7:9cd16581b578 351 }
IanBenzMaxim 7:9cd16581b578 352
IanBenzMaxim 7:9cd16581b578 353 template <typename T, size_t N>
IanBenzMaxim 7:9cd16581b578 354 span<const T, N> make_span(const array<T, N> & arr) {
IanBenzMaxim 7:9cd16581b578 355 return arr;
IanBenzMaxim 7:9cd16581b578 356 }
IanBenzMaxim 7:9cd16581b578 357
IanBenzMaxim 7:9cd16581b578 358 template <typename Container>
IanBenzMaxim 7:9cd16581b578 359 span<typename Container::value_type> make_span(Container & cont) {
IanBenzMaxim 7:9cd16581b578 360 return cont;
IanBenzMaxim 7:9cd16581b578 361 }
IanBenzMaxim 7:9cd16581b578 362
IanBenzMaxim 7:9cd16581b578 363 template <typename Container>
IanBenzMaxim 7:9cd16581b578 364 span<const typename Container::value_type> make_span(const Container & cont) {
IanBenzMaxim 7:9cd16581b578 365 return cont;
IanBenzMaxim 7:9cd16581b578 366 }
IanBenzMaxim 7:9cd16581b578 367
IanBenzMaxim 7:9cd16581b578 368 } // namespace MaximInterfaceCore
IanBenzMaxim 7:9cd16581b578 369
IanBenzMaxim 7:9cd16581b578 370 #endif