include/array - platform/external/libcxx - Gitiles

 // -*- C++ -*-
 //===---------------------------- array -----------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is dual licensed under the MIT and the University of Illinois Open
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//

 #ifndef _LIBCPP_ARRAY
 #define _LIBCPP_ARRAY

 /*
     array synopsis

 namespace std
 {
 template <class T, size_t N >
 struct array
 {
     // types:
     typedef T & reference;
     typedef const T & const_reference;
     typedef implementation defined iterator;
     typedef implementation defined const_iterator;
     typedef size_t size_type;
     typedef ptrdiff_t difference_type;
     typedef T value_type;
     typedef T* pointer;
     typedef const T* const_pointer;
     typedef std::reverse_iterator<iterator> reverse_iterator;
     typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

     // No explicit construct/copy/destroy for aggregate type
     void fill(const T& u);
     void swap(array& a) noexcept(is_nothrow_swappable_v<T>);

     // iterators:
     iterator begin() noexcept;
     const_iterator begin() const noexcept;
     iterator end() noexcept;
     const_iterator end() const noexcept;

     reverse_iterator rbegin() noexcept;
     const_reverse_iterator rbegin() const noexcept;
     reverse_iterator rend() noexcept;
     const_reverse_iterator rend() const noexcept;

     const_iterator cbegin() const noexcept;
     const_iterator cend() const noexcept;
     const_reverse_iterator crbegin() const noexcept;
     const_reverse_iterator crend() const noexcept;

     // capacity:
     constexpr size_type size() const noexcept;
     constexpr size_type max_size() const noexcept;
     constexpr bool empty() const noexcept;

     // element access:
     reference operator[](size_type n);
     const_reference operator[](size_type n) const; // constexpr in C++14
     const_reference at(size_type n) const; // constexpr in C++14
     reference at(size_type n);

     reference front();
     const_reference front() const; // constexpr in C++14
     reference back();
     const_reference back() const; // constexpr in C++14

     T* data() noexcept;
     const T* data() const noexcept;
 };

   template <class T, class... U>
     array(T, U...) -> array<T, 1 + sizeof...(U)>;

 template <class T, size_t N>
   bool operator==(const array<T,N>& x, const array<T,N>& y);
 template <class T, size_t N>
   bool operator!=(const array<T,N>& x, const array<T,N>& y);
 template <class T, size_t N>
   bool operator<(const array<T,N>& x, const array<T,N>& y);
 template <class T, size_t N>
   bool operator>(const array<T,N>& x, const array<T,N>& y);
 template <class T, size_t N>
   bool operator<=(const array<T,N>& x, const array<T,N>& y);
 template <class T, size_t N>
   bool operator>=(const array<T,N>& x, const array<T,N>& y);

 template <class T, size_t N >
   void swap(array<T,N>& x, array<T,N>& y) noexcept(noexcept(x.swap(y))); // C++17

 template <class T> class tuple_size;
 template <size_t I, class T> class tuple_element;
 template <class T, size_t N> struct tuple_size<array<T, N>>;
 template <size_t I, class T, size_t N> struct tuple_element<I, array<T, N>>;
 template <size_t I, class T, size_t N> T& get(array<T, N>&) noexcept; // constexpr in C++14
 template <size_t I, class T, size_t N> const T& get(const array<T, N>&) noexcept; // constexpr in C++14
 template <size_t I, class T, size_t N> T&& get(array<T, N>&&) noexcept; // constexpr in C++14
 template <size_t I, class T, size_t N> const T&& get(const array<T, N>&&) noexcept; // constexpr in C++14

 }  // std

 */

 #include <__config>
 #include <__tuple>
 #include <type_traits>
 #include <utility>
 #include <iterator>
 #include <algorithm>
 #include <stdexcept>
 #include <cstdlib> // for _LIBCPP_UNREACHABLE
 #include <version>
 #include <__debug>

 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #pragma GCC system_header
 #endif


 _LIBCPP_BEGIN_NAMESPACE_STD


 template <class _Tp, size_t _Size>
 struct _LIBCPP_TEMPLATE_VIS array
 {
     // types:
     typedef array __self;
     typedef _Tp                                   value_type;
     typedef value_type&                           reference;
     typedef const value_type&                     const_reference;
     typedef value_type*                           iterator;
     typedef const value_type*                     const_iterator;
     typedef value_type*                           pointer;
     typedef const value_type*                     const_pointer;
     typedef size_t                                size_type;
     typedef ptrdiff_t                             difference_type;
     typedef std::reverse_iterator<iterator>       reverse_iterator;
     typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

     _Tp __elems_[_Size];

     // No explicit construct/copy/destroy for aggregate type
     _LIBCPP_INLINE_VISIBILITY void fill(const value_type& __u) {
       _VSTD::fill_n(__elems_, _Size, __u);
     }

     _LIBCPP_INLINE_VISIBILITY
     void swap(array& __a) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value) {
       std::swap_ranges(__elems_, __elems_ + _Size, __a.__elems_);
     }

     // iterators:
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     iterator begin() _NOEXCEPT {return iterator(data());}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_iterator begin() const _NOEXCEPT {return const_iterator(data());}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     iterator end() _NOEXCEPT {return iterator(data() + _Size);}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_iterator end() const _NOEXCEPT {return const_iterator(data() + _Size);}

     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_reverse_iterator rbegin() const _NOEXCEPT {return const_reverse_iterator(end());}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     reverse_iterator rend() _NOEXCEPT {return reverse_iterator(begin());}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_reverse_iterator rend() const _NOEXCEPT {return const_reverse_iterator(begin());}

     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_iterator cbegin() const _NOEXCEPT {return begin();}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_iterator cend() const _NOEXCEPT {return end();}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const_reverse_iterator crend() const _NOEXCEPT {return rend();}

     // capacity:
     _LIBCPP_INLINE_VISIBILITY
     _LIBCPP_CONSTEXPR size_type size() const _NOEXCEPT {return _Size;}
     _LIBCPP_INLINE_VISIBILITY
     _LIBCPP_CONSTEXPR size_type max_size() const _NOEXCEPT {return _Size;}
     _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
     _LIBCPP_CONSTEXPR bool empty() const _NOEXCEPT {return false; }

     // element access:
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     reference operator[](size_type __n)             {return __elems_[__n];}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
     const_reference operator[](size_type __n) const {return __elems_[__n];}

     _LIBCPP_CONSTEXPR_AFTER_CXX14       reference at(size_type __n);
     _LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference at(size_type __n) const;

     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 reference front()             {return __elems_[0];}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference front() const {return __elems_[0];}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 reference back()              {return __elems_[_Size - 1];}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference back() const  {return __elems_[_Size - 1];}

     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     value_type* data() _NOEXCEPT {return __elems_;}
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
     const value_type* data() const _NOEXCEPT {return __elems_;}
 };


 template <class _Tp, size_t _Size>
 _LIBCPP_CONSTEXPR_AFTER_CXX14
 typename array<_Tp, _Size>::reference
 array<_Tp, _Size>::at(size_type __n)
 {
     if (__n >= _Size)
         __throw_out_of_range("array::at");

     return __elems_[__n];
 }

 template <class _Tp, size_t _Size>
 _LIBCPP_CONSTEXPR_AFTER_CXX11
 typename array<_Tp, _Size>::const_reference
 array<_Tp, _Size>::at(size_type __n) const
 {
     if (__n >= _Size)
         __throw_out_of_range("array::at");
     return __elems_[__n];
 }

 template <class _Tp>
 struct _LIBCPP_TEMPLATE_VIS array<_Tp, 0>
 {
     // types:
     typedef array __self;
     typedef _Tp                                   value_type;
     typedef value_type&                           reference;
     typedef const value_type&                     const_reference;
     typedef value_type*                           iterator;
     typedef const value_type*                     const_iterator;
     typedef value_type*                           pointer;
     typedef const value_type*                     const_pointer;
     typedef size_t                                size_type;
     typedef ptrdiff_t                             difference_type;
     typedef std::reverse_iterator<iterator>       reverse_iterator;
     typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

     typedef typename conditional<is_const<_Tp>::value, const char,
                                 char>::type _CharType;

     struct  _ArrayInStructT { _Tp __data_[1]; };
     _ALIGNAS_TYPE(_ArrayInStructT) _CharType __elems_[sizeof(_ArrayInStructT)];

     // No explicit construct/copy/destroy for aggregate type
     _LIBCPP_INLINE_VISIBILITY void fill(const value_type&) {
       static_assert(!is_const<_Tp>::value,
                     "cannot fill zero-sized array of type 'const T'");
     }

     _LIBCPP_INLINE_VISIBILITY
     void swap(array&) _NOEXCEPT {
       static_assert(!is_const<_Tp>::value,
                     "cannot swap zero-sized array of type 'const T'");
     }

     // iterators:
     _LIBCPP_INLINE_VISIBILITY
     iterator begin() _NOEXCEPT {return iterator(data());}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator begin() const _NOEXCEPT {return const_iterator(data());}
     _LIBCPP_INLINE_VISIBILITY
     iterator end() _NOEXCEPT {return iterator(data());}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator end() const _NOEXCEPT {return const_iterator(data());}

     _LIBCPP_INLINE_VISIBILITY
     reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
     _LIBCPP_INLINE_VISIBILITY
     const_reverse_iterator rbegin() const _NOEXCEPT {return const_reverse_iterator(end());}
     _LIBCPP_INLINE_VISIBILITY
     reverse_iterator rend() _NOEXCEPT {return reverse_iterator(begin());}
     _LIBCPP_INLINE_VISIBILITY
     const_reverse_iterator rend() const _NOEXCEPT {return const_reverse_iterator(begin());}

     _LIBCPP_INLINE_VISIBILITY
     const_iterator cbegin() const _NOEXCEPT {return begin();}
     _LIBCPP_INLINE_VISIBILITY
     const_iterator cend() const _NOEXCEPT {return end();}
     _LIBCPP_INLINE_VISIBILITY
     const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
     _LIBCPP_INLINE_VISIBILITY
     const_reverse_iterator crend() const _NOEXCEPT {return rend();}

     // capacity:
     _LIBCPP_INLINE_VISIBILITY
     _LIBCPP_CONSTEXPR size_type size() const _NOEXCEPT {return 0; }
     _LIBCPP_INLINE_VISIBILITY
     _LIBCPP_CONSTEXPR size_type max_size() const _NOEXCEPT {return 0;}
     _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
     _LIBCPP_CONSTEXPR bool empty() const _NOEXCEPT {return true;}

     // element access:
     _LIBCPP_INLINE_VISIBILITY
     reference operator[](size_type) {
       _LIBCPP_ASSERT(false, "cannot call array<T, 0>::operator[] on a zero-sized array");
       _LIBCPP_UNREACHABLE();
     }

     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
     const_reference operator[](size_type) const {
       _LIBCPP_ASSERT(false, "cannot call array<T, 0>::operator[] on a zero-sized array");
       _LIBCPP_UNREACHABLE();
     }

     _LIBCPP_INLINE_VISIBILITY
     reference at(size_type) {
       __throw_out_of_range("array<T, 0>::at");
       _LIBCPP_UNREACHABLE();
     }

     _LIBCPP_INLINE_VISIBILITY
     const_reference at(size_type) const {
       __throw_out_of_range("array<T, 0>::at");
       _LIBCPP_UNREACHABLE();
     }

     _LIBCPP_INLINE_VISIBILITY
     reference front() {
       _LIBCPP_ASSERT(false, "cannot call array<T, 0>::front() on a zero-sized array");
       _LIBCPP_UNREACHABLE();
     }

     _LIBCPP_INLINE_VISIBILITY
     const_reference front() const {
       _LIBCPP_ASSERT(false, "cannot call array<T, 0>::front() on a zero-sized array");
       _LIBCPP_UNREACHABLE();
     }

     _LIBCPP_INLINE_VISIBILITY
     reference back() {
       _LIBCPP_ASSERT(false, "cannot call array<T, 0>::back() on a zero-sized array");
       _LIBCPP_UNREACHABLE();
     }

     _LIBCPP_INLINE_VISIBILITY
     const_reference back() const {
       _LIBCPP_ASSERT(false, "cannot call array<T, 0>::back() on a zero-sized array");
       _LIBCPP_UNREACHABLE();
     }

     _LIBCPP_INLINE_VISIBILITY
     value_type* data() _NOEXCEPT {return reinterpret_cast<value_type*>(__elems_);}
     _LIBCPP_INLINE_VISIBILITY
     const value_type* data() const _NOEXCEPT {return reinterpret_cast<const value_type*>(__elems_);}
 };


 #ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
 template<class _Tp, class... _Args,
          class = typename enable_if<(is_same_v<_Tp, _Args> && ...), void>::type
          >
 array(_Tp, _Args...)
   -> array<_Tp, 1 + sizeof...(_Args)>;
 #endif

 template <class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
 _LIBCPP_CONSTEXPR_AFTER_CXX17 bool
 operator==(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
 {
     return _VSTD::equal(__x.begin(), __x.end(), __y.begin());
 }

 template <class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
 _LIBCPP_CONSTEXPR_AFTER_CXX17 bool
 operator!=(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
 {
     return !(__x == __y);
 }

 template <class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
 _LIBCPP_CONSTEXPR_AFTER_CXX17 bool
 operator<(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
 {
     return _VSTD::lexicographical_compare(__x.begin(), __x.end(),
                                           __y.begin(), __y.end());
 }

 template <class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
 _LIBCPP_CONSTEXPR_AFTER_CXX17 bool
 operator>(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
 {
     return __y < __x;
 }

 template <class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
 _LIBCPP_CONSTEXPR_AFTER_CXX17 bool
 operator<=(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
 {
     return !(__y < __x);
 }

 template <class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
 _LIBCPP_CONSTEXPR_AFTER_CXX17 bool
 operator>=(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
 {
     return !(__x < __y);
 }

 template <class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
 typename enable_if
 <
     _Size == 0 ||
     __is_swappable<_Tp>::value,
     void
 >::type
 swap(array<_Tp, _Size>& __x, array<_Tp, _Size>& __y)
                                   _NOEXCEPT_(noexcept(__x.swap(__y)))
 {
     __x.swap(__y);
 }

 template <class _Tp, size_t _Size>
 class _LIBCPP_TEMPLATE_VIS tuple_size<array<_Tp, _Size> >
     : public integral_constant<size_t, _Size> {};

 template <size_t _Ip, class _Tp, size_t _Size>
 class _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, array<_Tp, _Size> >
 {
     static_assert(_Ip < _Size, "Index out of bounds in std::tuple_element<> (std::array)");
 public:
     typedef _Tp type;
 };

 template <size_t _Ip, class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
 _Tp&
 get(array<_Tp, _Size>& __a) _NOEXCEPT
 {
     static_assert(_Ip < _Size, "Index out of bounds in std::get<> (std::array)");
     return __a.__elems_[_Ip];
 }

 template <size_t _Ip, class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
 const _Tp&
 get(const array<_Tp, _Size>& __a) _NOEXCEPT
 {
     static_assert(_Ip < _Size, "Index out of bounds in std::get<> (const std::array)");
     return __a.__elems_[_Ip];
 }

 #ifndef _LIBCPP_CXX03_LANG

 template <size_t _Ip, class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
 _Tp&&
 get(array<_Tp, _Size>&& __a) _NOEXCEPT
 {
     static_assert(_Ip < _Size, "Index out of bounds in std::get<> (std::array &&)");
     return _VSTD::move(__a.__elems_[_Ip]);
 }

 template <size_t _Ip, class _Tp, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
 const _Tp&&
 get(const array<_Tp, _Size>&& __a) _NOEXCEPT
 {
     static_assert(_Ip < _Size, "Index out of bounds in std::get<> (const std::array &&)");
     return _VSTD::move(__a.__elems_[_Ip]);
 }

 #endif  // !_LIBCPP_CXX03_LANG

 _LIBCPP_END_NAMESPACE_STD

 #endif  // _LIBCPP_ARRAY
	// -- C++ --
	//===---------------------------- array -----------------------------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is dual licensed under the MIT and the University of Illinois Open
	// Source Licenses. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//

	#ifndef _LIBCPP_ARRAY
	#define _LIBCPP_ARRAY

	/*
	array synopsis

	namespace std
	{
	template <class T, size_t N >
	struct array
	{
	// types:
	typedef T & reference;
	typedef const T & const_reference;
	typedef implementation defined iterator;
	typedef implementation defined const_iterator;
	typedef size_t size_type;
	typedef ptrdiff_t difference_type;
	typedef T value_type;
	typedef T* pointer;
	typedef const T* const_pointer;
	typedef std::reverse_iterator<iterator> reverse_iterator;
	typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

	// No explicit construct/copy/destroy for aggregate type
	void fill(const T& u);
	void swap(array& a) noexcept(is_nothrow_swappable_v<T>);

	// iterators:
	iterator begin() noexcept;
	const_iterator begin() const noexcept;
	iterator end() noexcept;
	const_iterator end() const noexcept;

	reverse_iterator rbegin() noexcept;
	const_reverse_iterator rbegin() const noexcept;
	reverse_iterator rend() noexcept;
	const_reverse_iterator rend() const noexcept;

	const_iterator cbegin() const noexcept;
	const_iterator cend() const noexcept;
	const_reverse_iterator crbegin() const noexcept;
	const_reverse_iterator crend() const noexcept;

	// capacity:
	constexpr size_type size() const noexcept;
	constexpr size_type max_size() const noexcept;
	constexpr bool empty() const noexcept;

	// element access:
	reference operator[](size_type n);
	const_reference operator[](size_type n) const; // constexpr in C++14
	const_reference at(size_type n) const; // constexpr in C++14
	reference at(size_type n);

	reference front();
	const_reference front() const; // constexpr in C++14
	reference back();
	const_reference back() const; // constexpr in C++14

	T* data() noexcept;
	const T* data() const noexcept;
	};

	template <class T, class... U>
	array(T, U...) -> array<T, 1 + sizeof...(U)>;

	template <class T, size_t N>
	bool operator==(const array<T,N>& x, const array<T,N>& y);
	template <class T, size_t N>
	bool operator!=(const array<T,N>& x, const array<T,N>& y);
	template <class T, size_t N>
	bool operator<(const array<T,N>& x, const array<T,N>& y);
	template <class T, size_t N>
	bool operator>(const array<T,N>& x, const array<T,N>& y);
	template <class T, size_t N>
	bool operator<=(const array<T,N>& x, const array<T,N>& y);
	template <class T, size_t N>
	bool operator>=(const array<T,N>& x, const array<T,N>& y);

	template <class T, size_t N >
	void swap(array<T,N>& x, array<T,N>& y) noexcept(noexcept(x.swap(y))); // C++17

	template <class T> class tuple_size;
	template <size_t I, class T> class tuple_element;
	template <class T, size_t N> struct tuple_size<array<T, N>>;
	template <size_t I, class T, size_t N> struct tuple_element<I, array<T, N>>;
	template <size_t I, class T, size_t N> T& get(array<T, N>&) noexcept; // constexpr in C++14
	template <size_t I, class T, size_t N> const T& get(const array<T, N>&) noexcept; // constexpr in C++14
	template <size_t I, class T, size_t N> T&& get(array<T, N>&&) noexcept; // constexpr in C++14
	template <size_t I, class T, size_t N> const T&& get(const array<T, N>&&) noexcept; // constexpr in C++14

	} // std

	*/

	#include <__config>
	#include <__tuple>
	#include <type_traits>
	#include <utility>
	#include <iterator>
	#include <algorithm>
	#include <stdexcept>
	#include <cstdlib> // for _LIBCPP_UNREACHABLE
	#include <version>
	#include <__debug>

	#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
	#pragma GCC system_header
	#endif



	_LIBCPP_BEGIN_NAMESPACE_STD


	template <class _Tp, size_t _Size>
	struct _LIBCPP_TEMPLATE_VIS array
	{
	// types:
	typedef array __self;
	typedef _Tp value_type;
	typedef value_type& reference;
	typedef const value_type& const_reference;
	typedef value_type* iterator;
	typedef const value_type* const_iterator;
	typedef value_type* pointer;
	typedef const value_type* const_pointer;
	typedef size_t size_type;
	typedef ptrdiff_t difference_type;
	typedef std::reverse_iterator<iterator> reverse_iterator;
	typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

	_Tp __elems_[_Size];

	// No explicit construct/copy/destroy for aggregate type
	_LIBCPP_INLINE_VISIBILITY void fill(const value_type& __u) {
	_VSTD::fill_n(__elems_, _Size, __u);
	}

	_LIBCPP_INLINE_VISIBILITY
	void swap(array& __a) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value) {
	std::swap_ranges(__elems_, __elems_ + _Size, __a.__elems_);
	}

	// iterators:
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	iterator begin() _NOEXCEPT {return iterator(data());}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	const_iterator begin() const _NOEXCEPT {return const_iterator(data());}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	iterator end() _NOEXCEPT {return iterator(data() + _Size);}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	const_iterator end() const _NOEXCEPT {return const_iterator(data() + _Size);}

	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	const_reverse_iterator rbegin() const _NOEXCEPT {return const_reverse_iterator(end());}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	reverse_iterator rend() _NOEXCEPT {return reverse_iterator(begin());}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	const_reverse_iterator rend() const _NOEXCEPT {return const_reverse_iterator(begin());}

	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	const_iterator cbegin() const _NOEXCEPT {return begin();}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	const_iterator cend() const _NOEXCEPT {return end();}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	const_reverse_iterator crend() const _NOEXCEPT {return rend();}

	// capacity:
	_LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR size_type size() const _NOEXCEPT {return _Size;}
	_LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR size_type max_size() const _NOEXCEPT {return _Size;}
	_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR bool empty() const _NOEXCEPT {return false; }

	// element access:
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	reference operator[](size_type __n) {return __elems_[__n];}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
	const_reference operator[](size_type __n) const {return __elems_[__n];}

	_LIBCPP_CONSTEXPR_AFTER_CXX14 reference at(size_type __n);
	_LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference at(size_type __n) const;

	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 reference front() {return __elems_[0];}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference front() const {return __elems_[0];}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 reference back() {return __elems_[_Size - 1];}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference back() const {return __elems_[_Size - 1];}

	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	value_type* data() _NOEXCEPT {return __elems_;}
	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
	const value_type* data() const _NOEXCEPT {return __elems_;}
	};


	template <class _Tp, size_t _Size>
	_LIBCPP_CONSTEXPR_AFTER_CXX14
	typename array<_Tp, _Size>::reference
	array<_Tp, _Size>::at(size_type __n)
	{
	if (__n >= _Size)
	__throw_out_of_range("array::at");

	return __elems_[__n];
	}

	template <class _Tp, size_t _Size>
	_LIBCPP_CONSTEXPR_AFTER_CXX11
	typename array<_Tp, _Size>::const_reference
	array<_Tp, _Size>::at(size_type __n) const
	{
	if (__n >= _Size)
	__throw_out_of_range("array::at");
	return __elems_[__n];
	}

	template <class _Tp>
	struct _LIBCPP_TEMPLATE_VIS array<_Tp, 0>
	{
	// types:
	typedef array __self;
	typedef _Tp value_type;
	typedef value_type& reference;
	typedef const value_type& const_reference;
	typedef value_type* iterator;
	typedef const value_type* const_iterator;
	typedef value_type* pointer;
	typedef const value_type* const_pointer;
	typedef size_t size_type;
	typedef ptrdiff_t difference_type;
	typedef std::reverse_iterator<iterator> reverse_iterator;
	typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

	typedef typename conditional<is_const<_Tp>::value, const char,
	char>::type _CharType;

	struct _ArrayInStructT { _Tp __data_[1]; };
	_ALIGNAS_TYPE(_ArrayInStructT) _CharType __elems_[sizeof(_ArrayInStructT)];

	// No explicit construct/copy/destroy for aggregate type
	_LIBCPP_INLINE_VISIBILITY void fill(const value_type&) {
	static_assert(!is_const<_Tp>::value,
	"cannot fill zero-sized array of type 'const T'");
	}

	_LIBCPP_INLINE_VISIBILITY
	void swap(array&) _NOEXCEPT {
	static_assert(!is_const<_Tp>::value,
	"cannot swap zero-sized array of type 'const T'");
	}

	// iterators:
	_LIBCPP_INLINE_VISIBILITY
	iterator begin() _NOEXCEPT {return iterator(data());}
	_LIBCPP_INLINE_VISIBILITY
	const_iterator begin() const _NOEXCEPT {return const_iterator(data());}
	_LIBCPP_INLINE_VISIBILITY
	iterator end() _NOEXCEPT {return iterator(data());}
	_LIBCPP_INLINE_VISIBILITY
	const_iterator end() const _NOEXCEPT {return const_iterator(data());}

	_LIBCPP_INLINE_VISIBILITY
	reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
	_LIBCPP_INLINE_VISIBILITY
	const_reverse_iterator rbegin() const _NOEXCEPT {return const_reverse_iterator(end());}
	_LIBCPP_INLINE_VISIBILITY
	reverse_iterator rend() _NOEXCEPT {return reverse_iterator(begin());}
	_LIBCPP_INLINE_VISIBILITY
	const_reverse_iterator rend() const _NOEXCEPT {return const_reverse_iterator(begin());}

	_LIBCPP_INLINE_VISIBILITY
	const_iterator cbegin() const _NOEXCEPT {return begin();}
	_LIBCPP_INLINE_VISIBILITY
	const_iterator cend() const _NOEXCEPT {return end();}
	_LIBCPP_INLINE_VISIBILITY
	const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
	_LIBCPP_INLINE_VISIBILITY
	const_reverse_iterator crend() const _NOEXCEPT {return rend();}

	// capacity:
	_LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR size_type size() const _NOEXCEPT {return 0; }
	_LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR size_type max_size() const _NOEXCEPT {return 0;}
	_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR bool empty() const _NOEXCEPT {return true;}

	// element access:
	_LIBCPP_INLINE_VISIBILITY
	reference operator[](size_type) {
	_LIBCPP_ASSERT(false, "cannot call array<T, 0>::operator[] on a zero-sized array");
	_LIBCPP_UNREACHABLE();
	}

	_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
	const_reference operator[](size_type) const {
	_LIBCPP_ASSERT(false, "cannot call array<T, 0>::operator[] on a zero-sized array");
	_LIBCPP_UNREACHABLE();
	}

	_LIBCPP_INLINE_VISIBILITY
	reference at(size_type) {
	__throw_out_of_range("array<T, 0>::at");
	_LIBCPP_UNREACHABLE();
	}

	_LIBCPP_INLINE_VISIBILITY
	const_reference at(size_type) const {
	__throw_out_of_range("array<T, 0>::at");
	_LIBCPP_UNREACHABLE();
	}

	_LIBCPP_INLINE_VISIBILITY
	reference front() {
	_LIBCPP_ASSERT(false, "cannot call array<T, 0>::front() on a zero-sized array");
	_LIBCPP_UNREACHABLE();
	}

	_LIBCPP_INLINE_VISIBILITY
	const_reference front() const {
	_LIBCPP_ASSERT(false, "cannot call array<T, 0>::front() on a zero-sized array");
	_LIBCPP_UNREACHABLE();
	}

	_LIBCPP_INLINE_VISIBILITY
	reference back() {
	_LIBCPP_ASSERT(false, "cannot call array<T, 0>::back() on a zero-sized array");
	_LIBCPP_UNREACHABLE();
	}

	_LIBCPP_INLINE_VISIBILITY
	const_reference back() const {
	_LIBCPP_ASSERT(false, "cannot call array<T, 0>::back() on a zero-sized array");
	_LIBCPP_UNREACHABLE();
	}

	_LIBCPP_INLINE_VISIBILITY
	value_type* data() _NOEXCEPT {return reinterpret_cast<value_type*>(__elems_);}
	_LIBCPP_INLINE_VISIBILITY
	const value_type* data() const _NOEXCEPT {return reinterpret_cast<const value_type*>(__elems_);}
	};


	#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
	template<class _Tp, class... _Args,
	class = typename enable_if<(is_same_v<_Tp, _Args> && ...), void>::type
	>
	array(_Tp, _Args...)
	-> array<_Tp, 1 + sizeof...(_Args)>;
	#endif

	template <class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR_AFTER_CXX17 bool
	operator==(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
	{
	return _VSTD::equal(__x.begin(), __x.end(), __y.begin());
	}

	template <class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR_AFTER_CXX17 bool
	operator!=(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
	{
	return !(__x == __y);
	}

	template <class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR_AFTER_CXX17 bool
	operator<(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
	{
	return _VSTD::lexicographical_compare(__x.begin(), __x.end(),
	__y.begin(), __y.end());
	}

	template <class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR_AFTER_CXX17 bool
	operator>(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
	{
	return __y < __x;
	}

	template <class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR_AFTER_CXX17 bool
	operator<=(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
	{
	return !(__y < __x);
	}

	template <class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY
	_LIBCPP_CONSTEXPR_AFTER_CXX17 bool
	operator>=(const array<_Tp, _Size>& __x, const array<_Tp, _Size>& __y)
	{
	return !(__x < __y);
	}

	template <class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY
	typename enable_if
	<
	_Size == 0 \|\|
	__is_swappable<_Tp>::value,
	void
	>::type
	swap(array<_Tp, _Size>& __x, array<_Tp, _Size>& __y)
	_NOEXCEPT_(noexcept(__x.swap(__y)))
	{
	__x.swap(__y);
	}

	template <class _Tp, size_t _Size>
	class _LIBCPP_TEMPLATE_VIS tuple_size<array<_Tp, _Size> >
	: public integral_constant<size_t, _Size> {};

	template <size_t _Ip, class _Tp, size_t _Size>
	class _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, array<_Tp, _Size> >
	{
	static_assert(_Ip < _Size, "Index out of bounds in std::tuple_element<> (std::array)");
	public:
	typedef _Tp type;
	};

	template <size_t _Ip, class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
	_Tp&
	get(array<_Tp, _Size>& __a) _NOEXCEPT
	{
	static_assert(_Ip < _Size, "Index out of bounds in std::get<> (std::array)");
	return __a.__elems_[_Ip];
	}

	template <size_t _Ip, class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
	const _Tp&
	get(const array<_Tp, _Size>& __a) _NOEXCEPT
	{
	static_assert(_Ip < _Size, "Index out of bounds in std::get<> (const std::array)");
	return __a.__elems_[_Ip];
	}

	#ifndef _LIBCPP_CXX03_LANG

	template <size_t _Ip, class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
	_Tp&&
	get(array<_Tp, _Size>&& __a) _NOEXCEPT
	{
	static_assert(_Ip < _Size, "Index out of bounds in std::get<> (std::array &&)");
	return _VSTD::move(__a.__elems_[_Ip]);
	}

	template <size_t _Ip, class _Tp, size_t _Size>
	inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
	const _Tp&&
	get(const array<_Tp, _Size>&& __a) _NOEXCEPT
	{
	static_assert(_Ip < _Size, "Index out of bounds in std::get<> (const std::array &&)");
	return _VSTD::move(__a.__elems_[_Ip]);
	}

	#endif // !_LIBCPP_CXX03_LANG

	_LIBCPP_END_NAMESPACE_STD

	#endif // _LIBCPP_ARRAY