29 #ifndef _GLIBCXX_ARRAY
30 #define _GLIBCXX_ARRAY 1
32 #pragma GCC system_header
34 #if __cplusplus < 201103L
43 namespace std _GLIBCXX_VISIBILITY(default)
45 _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
47 template<
typename _Tp, std::
size_t _Nm>
50 typedef _Tp _Type[_Nm];
51 typedef __is_swappable<_Tp> _Is_swappable;
52 typedef __is_nothrow_swappable<_Tp> _Is_nothrow_swappable;
55 _S_ref(
const _Type& __t, std::size_t __n) noexcept
56 {
return const_cast<_Tp&
>(__t[__n]); }
59 _S_ptr(
const _Type& __t) noexcept
60 {
return const_cast<_Tp*
>(__t); }
63 template<
typename _Tp>
64 struct __array_traits<_Tp, 0>
71 _S_ref(
const _Type&, std::size_t) noexcept
72 {
return *
static_cast<_Tp*
>(
nullptr); }
75 _S_ptr(
const _Type&) noexcept
93 template<
typename _Tp, std::
size_t _Nm>
96 typedef _Tp value_type;
97 typedef value_type* pointer;
98 typedef const value_type* const_pointer;
99 typedef value_type& reference;
100 typedef const value_type& const_reference;
101 typedef value_type* iterator;
102 typedef const value_type* const_iterator;
103 typedef std::size_t size_type;
104 typedef std::ptrdiff_t difference_type;
109 typedef _GLIBCXX_STD_C::__array_traits<_Tp, _Nm> _AT_Type;
110 typename _AT_Type::_Type _M_elems;
115 _GLIBCXX20_CONSTEXPR
void
116 fill(
const value_type& __u)
119 _GLIBCXX20_CONSTEXPR
void
121 noexcept(_AT_Type::_Is_nothrow_swappable::value)
125 _GLIBCXX17_CONSTEXPR iterator
127 {
return iterator(data()); }
129 _GLIBCXX17_CONSTEXPR const_iterator
130 begin()
const noexcept
131 {
return const_iterator(data()); }
133 _GLIBCXX17_CONSTEXPR iterator
135 {
return iterator(data() + _Nm); }
137 _GLIBCXX17_CONSTEXPR const_iterator
139 {
return const_iterator(data() + _Nm); }
146 rbegin()
const noexcept
154 rend()
const noexcept
157 _GLIBCXX17_CONSTEXPR const_iterator
158 cbegin()
const noexcept
159 {
return const_iterator(data()); }
161 _GLIBCXX17_CONSTEXPR const_iterator
162 cend()
const noexcept
163 {
return const_iterator(data() + _Nm); }
166 crbegin()
const noexcept
170 crend()
const noexcept
175 size()
const noexcept {
return _Nm; }
178 max_size()
const noexcept {
return _Nm; }
180 _GLIBCXX_NODISCARD constexpr
bool
181 empty()
const noexcept {
return size() == 0; }
184 _GLIBCXX17_CONSTEXPR reference
185 operator[](size_type __n) noexcept
186 {
return _AT_Type::_S_ref(_M_elems, __n); }
188 constexpr const_reference
189 operator[](size_type __n)
const noexcept
190 {
return _AT_Type::_S_ref(_M_elems, __n); }
192 _GLIBCXX17_CONSTEXPR reference
196 std::__throw_out_of_range_fmt(__N(
"array::at: __n (which is %zu) "
197 ">= _Nm (which is %zu)"),
199 return _AT_Type::_S_ref(_M_elems, __n);
202 constexpr const_reference
203 at(size_type __n)
const
207 return __n < _Nm ? _AT_Type::_S_ref(_M_elems, __n)
208 : (std::__throw_out_of_range_fmt(__N(
"array::at: __n (which is %zu) "
209 ">= _Nm (which is %zu)"),
211 _AT_Type::_S_ref(_M_elems, 0));
214 _GLIBCXX17_CONSTEXPR reference
218 constexpr const_reference
219 front()
const noexcept
220 {
return _AT_Type::_S_ref(_M_elems, 0); }
222 _GLIBCXX17_CONSTEXPR reference
224 {
return _Nm ? *(end() - 1) : *end(); }
226 constexpr const_reference
227 back()
const noexcept
229 return _Nm ? _AT_Type::_S_ref(_M_elems, _Nm - 1)
230 : _AT_Type::_S_ref(_M_elems, 0);
233 _GLIBCXX17_CONSTEXPR pointer
235 {
return _AT_Type::_S_ptr(_M_elems); }
237 _GLIBCXX17_CONSTEXPR const_pointer
238 data()
const noexcept
239 {
return _AT_Type::_S_ptr(_M_elems); }
242 #if __cpp_deduction_guides >= 201606
243 template<
typename _Tp,
typename... _Up>
250 template<
typename _Tp, std::
size_t _Nm>
254 {
return std::equal(__one.begin(), __one.end(), __two.begin()); }
256 #if __cpp_lib_three_way_comparison && __cpp_lib_concepts
257 template<
typename _Tp,
size_t _Nm>
258 constexpr __detail::__synth3way_t<_Tp>
259 operator<=>(
const array<_Tp, _Nm>& __a,
const array<_Tp, _Nm>& __b)
261 if constexpr (_Nm && __is_byte<_Tp>::__value)
262 return __builtin_memcmp(__a.data(), __b.data(), _Nm) <=> 0;
265 for (
size_t __i = 0; __i < _Nm; ++__i)
267 auto __c = __detail::__synth3way(__a[__i], __b[__i]);
272 return strong_ordering::equal;
275 template<
typename _Tp, std::
size_t _Nm>
278 operator!=(
const array<_Tp, _Nm>& __one,
const array<_Tp, _Nm>& __two)
279 {
return !(__one == __two); }
281 template<
typename _Tp, std::
size_t _Nm>
284 operator<(
const array<_Tp, _Nm>& __a,
const array<_Tp, _Nm>& __b)
287 __b.begin(), __b.end());
290 template<
typename _Tp, std::
size_t _Nm>
293 operator>(
const array<_Tp, _Nm>& __one,
const array<_Tp, _Nm>& __two)
294 {
return __two < __one; }
296 template<
typename _Tp, std::
size_t _Nm>
299 operator<=(
const array<_Tp, _Nm>& __one,
const array<_Tp, _Nm>& __two)
300 {
return !(__one > __two); }
302 template<
typename _Tp, std::
size_t _Nm>
305 operator>=(
const array<_Tp, _Nm>& __one,
const array<_Tp, _Nm>& __two)
306 {
return !(__one < __two); }
307 #endif // three_way_comparison && concepts
310 template<
typename _Tp, std::
size_t _Nm>
313 #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11
316 _GLIBCXX_STD_C::__array_traits<_Tp, _Nm>::_Is_swappable::value
321 swap(array<_Tp, _Nm>& __one, array<_Tp, _Nm>& __two)
322 noexcept(noexcept(__one.swap(__two)))
323 { __one.swap(__two); }
325 #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11
326 template<
typename _Tp, std::
size_t _Nm>
328 !_GLIBCXX_STD_C::__array_traits<_Tp, _Nm>::_Is_swappable::value>::type
329 swap(array<_Tp, _Nm>&, array<_Tp, _Nm>&) =
delete;
332 template<std::
size_t _Int,
typename _Tp, std::
size_t _Nm>
334 get(array<_Tp, _Nm>& __arr) noexcept
336 static_assert(_Int < _Nm,
"array index is within bounds");
337 return _GLIBCXX_STD_C::__array_traits<_Tp, _Nm>::
338 _S_ref(__arr._M_elems, _Int);
341 template<std::
size_t _Int,
typename _Tp, std::
size_t _Nm>
343 get(array<_Tp, _Nm>&& __arr) noexcept
345 static_assert(_Int < _Nm,
"array index is within bounds");
346 return std::move(_GLIBCXX_STD_C::get<_Int>(__arr));
349 template<std::
size_t _Int,
typename _Tp, std::
size_t _Nm>
351 get(
const array<_Tp, _Nm>& __arr) noexcept
353 static_assert(_Int < _Nm,
"array index is within bounds");
354 return _GLIBCXX_STD_C::__array_traits<_Tp, _Nm>::
355 _S_ref(__arr._M_elems, _Int);
358 template<std::
size_t _Int,
typename _Tp, std::
size_t _Nm>
359 constexpr
const _Tp&&
360 get(
const array<_Tp, _Nm>&& __arr) noexcept
362 static_assert(_Int < _Nm,
"array index is within bounds");
363 return std::move(_GLIBCXX_STD_C::get<_Int>(__arr));
366 #if __cplusplus > 201703L
367 #define __cpp_lib_to_array 201907L
369 template<
bool _Move =
false,
typename _Tp,
size_t... _Idx>
370 constexpr array<remove_cv_t<_Tp>,
sizeof...(_Idx)>
371 __to_array(_Tp (&__a)[
sizeof...(_Idx)], index_sequence<_Idx...>)
376 return {{__a[_Idx]...}};
379 template<
typename _Tp,
size_t _Nm>
380 constexpr array<remove_cv_t<_Tp>, _Nm>
382 noexcept(is_nothrow_constructible_v<_Tp, _Tp&>)
384 static_assert(!is_array_v<_Tp>);
385 static_assert(is_constructible_v<_Tp, _Tp&>);
386 if constexpr (is_constructible_v<_Tp, _Tp&>)
387 return _GLIBCXX_STD_C::__to_array(__a, make_index_sequence<_Nm>{});
388 __builtin_unreachable();
391 template<
typename _Tp,
size_t _Nm>
392 constexpr array<remove_cv_t<_Tp>, _Nm>
394 noexcept(is_nothrow_move_constructible_v<_Tp>)
396 static_assert(!is_array_v<_Tp>);
397 static_assert(is_move_constructible_v<_Tp>);
398 if constexpr (is_move_constructible_v<_Tp>)
399 return _GLIBCXX_STD_C::__to_array<1>(__a, make_index_sequence<_Nm>{});
400 __builtin_unreachable();
404 _GLIBCXX_END_NAMESPACE_CONTAINER
407 namespace std _GLIBCXX_VISIBILITY(default)
409 _GLIBCXX_BEGIN_NAMESPACE_VERSION
414 template<
typename _Tp>
418 template<
typename _Tp, std::
size_t _Nm>
423 template<std::
size_t _Int,
typename _Tp>
427 template<std::
size_t _Int,
typename _Tp, std::
size_t _Nm>
430 static_assert(_Int < _Nm,
"index is out of bounds");
434 template<
typename _Tp, std::
size_t _Nm>
435 struct __is_tuple_like_impl<_GLIBCXX_STD_C::
array<_Tp, _Nm>> :
true_type
438 _GLIBCXX_END_NAMESPACE_VERSION
441 #ifdef _GLIBCXX_DEBUG
447 #endif // _GLIBCXX_ARRAY