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Diffstat (limited to 'contrib/libc++/include/utility')
| -rw-r--r-- | contrib/libc++/include/utility | 768 |
1 files changed, 768 insertions, 0 deletions
diff --git a/contrib/libc++/include/utility b/contrib/libc++/include/utility new file mode 100644 index 0000000..2c1f62c --- /dev/null +++ b/contrib/libc++/include/utility @@ -0,0 +1,768 @@ +// -*- C++ -*- +//===-------------------------- utility -----------------------------------===// +// +// 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_UTILITY +#define _LIBCPP_UTILITY + +/* + utility synopsis + +namespace std +{ + +template <class T> + void + swap(T& a, T& b); + +namespace rel_ops +{ + template<class T> bool operator!=(const T&, const T&); + template<class T> bool operator> (const T&, const T&); + template<class T> bool operator<=(const T&, const T&); + template<class T> bool operator>=(const T&, const T&); +} + +template<class T> +void +swap(T& a, T& b) noexcept(is_nothrow_move_constructible<T>::value && + is_nothrow_move_assignable<T>::value); + +template <class T, size_t N> +void +swap(T (&a)[N], T (&b)[N]) noexcept(noexcept(swap(*a, *b))); + +template <class T> T&& forward(typename remove_reference<T>::type& t) noexcept; // constexpr in C++14 +template <class T> T&& forward(typename remove_reference<T>::type&& t) noexcept; // constexpr in C++14 + +template <class T> typename remove_reference<T>::type&& move(T&&) noexcept; // constexpr in C++14 + +template <class T> + typename conditional + < + !is_nothrow_move_constructible<T>::value && is_copy_constructible<T>::value, + const T&, + T&& + >::type + move_if_noexcept(T& x) noexcept; // constexpr in C++14 + +template <class T> typename add_rvalue_reference<T>::type declval() noexcept; + +template <class T1, class T2> +struct pair +{ + typedef T1 first_type; + typedef T2 second_type; + + T1 first; + T2 second; + + pair(const pair&) = default; + pair(pair&&) = default; + constexpr pair(); + pair(const T1& x, const T2& y); // constexpr in C++14 + template <class U, class V> pair(U&& x, V&& y); // constexpr in C++14 + template <class U, class V> pair(const pair<U, V>& p); // constexpr in C++14 + template <class U, class V> pair(pair<U, V>&& p); // constexpr in C++14 + template <class... Args1, class... Args2> + pair(piecewise_construct_t, tuple<Args1...> first_args, + tuple<Args2...> second_args); + + template <class U, class V> pair& operator=(const pair<U, V>& p); + pair& operator=(pair&& p) noexcept(is_nothrow_move_assignable<T1>::value && + is_nothrow_move_assignable<T2>::value); + template <class U, class V> pair& operator=(pair<U, V>&& p); + + void swap(pair& p) noexcept(noexcept(swap(first, p.first)) && + noexcept(swap(second, p.second))); +}; + +template <class T1, class T2> bool operator==(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 +template <class T1, class T2> bool operator!=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 +template <class T1, class T2> bool operator< (const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 +template <class T1, class T2> bool operator> (const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 +template <class T1, class T2> bool operator>=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 +template <class T1, class T2> bool operator<=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14 + +template <class T1, class T2> pair<V1, V2> make_pair(T1&&, T2&&); // constexpr in C++14 +template <class T1, class T2> +void +swap(pair<T1, T2>& x, pair<T1, T2>& y) noexcept(noexcept(x.swap(y))); + +struct piecewise_construct_t { }; +constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t(); + +template <class T> class tuple_size; +template <size_t I, class T> class tuple_element; + +template <class T1, class T2> struct tuple_size<std::pair<T1, T2> >; +template <class T1, class T2> struct tuple_element<0, std::pair<T1, T2> >; +template <class T1, class T2> struct tuple_element<1, std::pair<T1, T2> >; + +template<size_t I, class T1, class T2> + typename tuple_element<I, std::pair<T1, T2> >::type& + get(std::pair<T1, T2>&) noexcept; // constexpr in C++14 + +template<size_t I, class T1, class T2> + const typename const tuple_element<I, std::pair<T1, T2> >::type& + get(const std::pair<T1, T2>&) noexcept; // constexpr in C++14 + +template<size_t I, class T1, class T2> + typename tuple_element<I, std::pair<T1, T2> >::type&& + get(std::pair<T1, T2>&&) noexcept; // constexpr in C++14 + +template<class T1, class T2> + constexpr T1& get(std::pair<T1, T2>&) noexcept; // C++14 + +template<size_t I, class T1, class T2> + constexpr T1 const& get(std::pair<T1, T2> const &) noexcept; // C++14 + +template<size_t I, class T1, class T2> + constexpr T1&& get(std::pair<T1, T2>&&) noexcept; // C++14 + +// C++14 + +template<class T, T... I> +struct integer_sequence +{ + typedef T value_type; + + static constexpr size_t size() noexcept; +}; + +template<size_t... I> + using index_sequence = integer_sequence<size_t, I...>; + +template<class T, T N> + using make_integer_sequence = integer_sequence<T, 0, 1, ..., N-1>; +template<size_t N> + using make_index_sequence = make_integer_sequence<size_t, N>; + +template<class... T> + using index_sequence_for = make_index_sequence<sizeof...(T)>; + +template<class T, class U=T> + T exchange(T& obj, U&& new_value); +} // std + +*/ + +#include <__config> +#include <__tuple> +#include <type_traits> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +namespace rel_ops +{ + +template<class _Tp> +inline _LIBCPP_INLINE_VISIBILITY +bool +operator!=(const _Tp& __x, const _Tp& __y) +{ + return !(__x == __y); +} + +template<class _Tp> +inline _LIBCPP_INLINE_VISIBILITY +bool +operator> (const _Tp& __x, const _Tp& __y) +{ + return __y < __x; +} + +template<class _Tp> +inline _LIBCPP_INLINE_VISIBILITY +bool +operator<=(const _Tp& __x, const _Tp& __y) +{ + return !(__y < __x); +} + +template<class _Tp> +inline _LIBCPP_INLINE_VISIBILITY +bool +operator>=(const _Tp& __x, const _Tp& __y) +{ + return !(__x < __y); +} + +} // rel_ops + +// swap_ranges + +template <class _ForwardIterator1, class _ForwardIterator2> +inline _LIBCPP_INLINE_VISIBILITY +_ForwardIterator2 +swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2) +{ + for(; __first1 != __last1; ++__first1, ++__first2) + swap(*__first1, *__first2); + return __first2; +} + +template<class _Tp, size_t _Np> +inline _LIBCPP_INLINE_VISIBILITY +void +swap(_Tp (&__a)[_Np], _Tp (&__b)[_Np]) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value) +{ + _VSTD::swap_ranges(__a, __a + _Np, __b); +} + +template <class _Tp> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES +typename conditional +< + !is_nothrow_move_constructible<_Tp>::value && is_copy_constructible<_Tp>::value, + const _Tp&, + _Tp&& +>::type +#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES +const _Tp& +#endif +move_if_noexcept(_Tp& __x) _NOEXCEPT +{ + return _VSTD::move(__x); +} + +struct _LIBCPP_TYPE_VIS_ONLY piecewise_construct_t { }; +#if defined(_LIBCPP_HAS_NO_CONSTEXPR) || defined(_LIBCPP_BUILDING_UTILITY) +extern const piecewise_construct_t piecewise_construct;// = piecewise_construct_t(); +#else +constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t(); +#endif + +template <class _T1, class _T2> +struct _LIBCPP_TYPE_VIS_ONLY pair +{ + typedef _T1 first_type; + typedef _T2 second_type; + + _T1 first; + _T2 second; + + // pair(const pair&) = default; + // pair(pair&&) = default; + + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR pair() : first(), second() {} + + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + pair(const _T1& __x, const _T2& __y) + : first(__x), second(__y) {} + + template<class _U1, class _U2> + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + pair(const pair<_U1, _U2>& __p +#ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE + ,typename enable_if<is_convertible<const _U1&, _T1>::value && + is_convertible<const _U2&, _T2>::value>::type* = 0 +#endif + ) + : first(__p.first), second(__p.second) {} + +#if !defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && _LIBCPP_TRIVIAL_PAIR_COPY_CTOR + _LIBCPP_INLINE_VISIBILITY + pair(const pair& __p) = default; +#elif !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) || !_LIBCPP_TRIVIAL_PAIR_COPY_CTOR + _LIBCPP_INLINE_VISIBILITY + pair(const pair& __p) + _NOEXCEPT_(is_nothrow_copy_constructible<first_type>::value && + is_nothrow_copy_constructible<second_type>::value) + : first(__p.first), + second(__p.second) + { + } +#endif + + _LIBCPP_INLINE_VISIBILITY + pair& operator=(const pair& __p) + _NOEXCEPT_(is_nothrow_copy_assignable<first_type>::value && + is_nothrow_copy_assignable<second_type>::value) + { + first = __p.first; + second = __p.second; + return *this; + } + +#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES + + template <class _U1, class _U2, + class = typename enable_if<is_convertible<_U1, first_type>::value && + is_convertible<_U2, second_type>::value>::type> + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + pair(_U1&& __u1, _U2&& __u2) + : first(_VSTD::forward<_U1>(__u1)), + second(_VSTD::forward<_U2>(__u2)) + {} + + template<class _U1, class _U2> + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + pair(pair<_U1, _U2>&& __p, + typename enable_if<is_convertible<_U1, _T1>::value && + is_convertible<_U2, _T2>::value>::type* = 0) + : first(_VSTD::forward<_U1>(__p.first)), + second(_VSTD::forward<_U2>(__p.second)) {} + +#ifndef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS + _LIBCPP_INLINE_VISIBILITY + pair(pair&& __p) = default; +#else + _LIBCPP_INLINE_VISIBILITY + pair(pair&& __p) _NOEXCEPT_(is_nothrow_move_constructible<first_type>::value && + is_nothrow_move_constructible<second_type>::value) + : first(_VSTD::forward<first_type>(__p.first)), + second(_VSTD::forward<second_type>(__p.second)) + { + } +#endif + + _LIBCPP_INLINE_VISIBILITY + pair& + operator=(pair&& __p) _NOEXCEPT_(is_nothrow_move_assignable<first_type>::value && + is_nothrow_move_assignable<second_type>::value) + { + first = _VSTD::forward<first_type>(__p.first); + second = _VSTD::forward<second_type>(__p.second); + return *this; + } + +#ifndef _LIBCPP_HAS_NO_VARIADICS + + template<class _Tuple, + class = typename enable_if<__tuple_convertible<_Tuple, pair>::value>::type> + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + pair(_Tuple&& __p) + : first(_VSTD::forward<typename tuple_element<0, + typename __make_tuple_types<_Tuple>::type>::type>(get<0>(__p))), + second(_VSTD::forward<typename tuple_element<1, + typename __make_tuple_types<_Tuple>::type>::type>(get<1>(__p))) + {} + + + + template <class... _Args1, class... _Args2> + _LIBCPP_INLINE_VISIBILITY + pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args, + tuple<_Args2...> __second_args) + : pair(__pc, __first_args, __second_args, + typename __make_tuple_indices<sizeof...(_Args1)>::type(), + typename __make_tuple_indices<sizeof...(_Args2) >::type()) + {} + + template <class _Tuple, + class = typename enable_if<__tuple_assignable<_Tuple, pair>::value>::type> + _LIBCPP_INLINE_VISIBILITY + pair& + operator=(_Tuple&& __p) + { + typedef typename __make_tuple_types<_Tuple>::type _TupleRef; + typedef typename tuple_element<0, _TupleRef>::type _U0; + typedef typename tuple_element<1, _TupleRef>::type _U1; + first = _VSTD::forward<_U0>(_VSTD::get<0>(__p)); + second = _VSTD::forward<_U1>(_VSTD::get<1>(__p)); + return *this; + } + +#endif // _LIBCPP_HAS_NO_VARIADICS + +#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES + _LIBCPP_INLINE_VISIBILITY + void + swap(pair& __p) _NOEXCEPT_(__is_nothrow_swappable<first_type>::value && + __is_nothrow_swappable<second_type>::value) + { + _VSTD::iter_swap(&first, &__p.first); + _VSTD::iter_swap(&second, &__p.second); + } +private: + +#ifndef _LIBCPP_HAS_NO_VARIADICS + template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2> + _LIBCPP_INLINE_VISIBILITY + pair(piecewise_construct_t, + tuple<_Args1...>& __first_args, tuple<_Args2...>& __second_args, + __tuple_indices<_I1...>, __tuple_indices<_I2...>); +#endif // _LIBCPP_HAS_NO_VARIADICS +}; + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +bool +operator==(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) +{ + return __x.first == __y.first && __x.second == __y.second; +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +bool +operator!=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) +{ + return !(__x == __y); +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +bool +operator< (const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) +{ + return __x.first < __y.first || (!(__y.first < __x.first) && __x.second < __y.second); +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +bool +operator> (const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) +{ + return __y < __x; +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +bool +operator>=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) +{ + return !(__x < __y); +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +bool +operator<=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y) +{ + return !(__y < __x); +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY +typename enable_if +< + __is_swappable<_T1>::value && + __is_swappable<_T2>::value, + void +>::type +swap(pair<_T1, _T2>& __x, pair<_T1, _T2>& __y) + _NOEXCEPT_((__is_nothrow_swappable<_T1>::value && + __is_nothrow_swappable<_T2>::value)) +{ + __x.swap(__y); +} + +#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES + +template <class _Tp> class _LIBCPP_TYPE_VIS_ONLY reference_wrapper; + +template <class _Tp> +struct ___make_pair_return +{ + typedef _Tp type; +}; + +template <class _Tp> +struct ___make_pair_return<reference_wrapper<_Tp>> +{ + typedef _Tp& type; +}; + +template <class _Tp> +struct __make_pair_return +{ + typedef typename ___make_pair_return<typename decay<_Tp>::type>::type type; +}; + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +pair<typename __make_pair_return<_T1>::type, typename __make_pair_return<_T2>::type> +make_pair(_T1&& __t1, _T2&& __t2) +{ + return pair<typename __make_pair_return<_T1>::type, typename __make_pair_return<_T2>::type> + (_VSTD::forward<_T1>(__t1), _VSTD::forward<_T2>(__t2)); +} + +#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY +pair<_T1,_T2> +make_pair(_T1 __x, _T2 __y) +{ + return pair<_T1, _T2>(__x, __y); +} + +#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES + +template <class _T1, class _T2> + class _LIBCPP_TYPE_VIS_ONLY tuple_size<pair<_T1, _T2> > + : public integral_constant<size_t, 2> {}; + +template <class _T1, class _T2> + class _LIBCPP_TYPE_VIS_ONLY tuple_size<const pair<_T1, _T2> > + : public integral_constant<size_t, 2> {}; + +template <class _T1, class _T2> +class _LIBCPP_TYPE_VIS_ONLY tuple_element<0, pair<_T1, _T2> > +{ +public: + typedef _T1 type; +}; + +template <class _T1, class _T2> +class _LIBCPP_TYPE_VIS_ONLY tuple_element<1, pair<_T1, _T2> > +{ +public: + typedef _T2 type; +}; + +template <class _T1, class _T2> +class _LIBCPP_TYPE_VIS_ONLY tuple_element<0, const pair<_T1, _T2> > +{ +public: + typedef const _T1 type; +}; + +template <class _T1, class _T2> +class _LIBCPP_TYPE_VIS_ONLY tuple_element<1, const pair<_T1, _T2> > +{ +public: + typedef const _T2 type; +}; + +template <size_t _Ip> struct __get_pair; + +template <> +struct __get_pair<0> +{ + template <class _T1, class _T2> + static + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + _T1& + get(pair<_T1, _T2>& __p) _NOEXCEPT {return __p.first;} + + template <class _T1, class _T2> + static + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + const _T1& + get(const pair<_T1, _T2>& __p) _NOEXCEPT {return __p.first;} + +#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES + + template <class _T1, class _T2> + static + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + _T1&& + get(pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<_T1>(__p.first);} + +#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES +}; + +template <> +struct __get_pair<1> +{ + template <class _T1, class _T2> + static + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + _T2& + get(pair<_T1, _T2>& __p) _NOEXCEPT {return __p.second;} + + template <class _T1, class _T2> + static + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + const _T2& + get(const pair<_T1, _T2>& __p) _NOEXCEPT {return __p.second;} + +#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES + + template <class _T1, class _T2> + static + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + _T2&& + get(pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<_T2>(__p.second);} + +#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES +}; + +template <size_t _Ip, class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +typename tuple_element<_Ip, pair<_T1, _T2> >::type& +get(pair<_T1, _T2>& __p) _NOEXCEPT +{ + return __get_pair<_Ip>::get(__p); +} + +template <size_t _Ip, class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +const typename tuple_element<_Ip, pair<_T1, _T2> >::type& +get(const pair<_T1, _T2>& __p) _NOEXCEPT +{ + return __get_pair<_Ip>::get(__p); +} + +#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES + +template <size_t _Ip, class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +typename tuple_element<_Ip, pair<_T1, _T2> >::type&& +get(pair<_T1, _T2>&& __p) _NOEXCEPT +{ + return __get_pair<_Ip>::get(_VSTD::move(__p)); +} + +#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES + +#if _LIBCPP_STD_VER > 11 +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY +constexpr _T1 & get(pair<_T1, _T2>& __p) _NOEXCEPT +{ + return __get_pair<0>::get(__p); +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY +constexpr _T1 const & get(pair<_T1, _T2> const& __p) _NOEXCEPT +{ + return __get_pair<0>::get(__p); +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY +constexpr _T1 && get(pair<_T1, _T2>&& __p) _NOEXCEPT +{ + return __get_pair<0>::get(_VSTD::move(__p)); +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY +constexpr _T1 & get(pair<_T2, _T1>& __p) _NOEXCEPT +{ + return __get_pair<1>::get(__p); +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY +constexpr _T1 const & get(pair<_T2, _T1> const& __p) _NOEXCEPT +{ + return __get_pair<1>::get(__p); +} + +template <class _T1, class _T2> +inline _LIBCPP_INLINE_VISIBILITY +constexpr _T1 && get(pair<_T2, _T1>&& __p) _NOEXCEPT +{ + return __get_pair<1>::get(_VSTD::move(__p)); +} + +#endif + +#if _LIBCPP_STD_VER > 11 + +template<class _Tp, _Tp... _Ip> +struct _LIBCPP_TYPE_VIS_ONLY integer_sequence +{ + typedef _Tp value_type; + static_assert( is_integral<_Tp>::value, + "std::integer_sequence can only be instantiated with an integral type" ); + static + _LIBCPP_INLINE_VISIBILITY + constexpr + size_t + size() noexcept { return sizeof...(_Ip); } +}; + +template<size_t... _Ip> + using index_sequence = integer_sequence<size_t, _Ip...>; + +namespace __detail { + +template<typename _Tp, size_t ..._Extra> struct __repeat; +template<typename _Tp, _Tp ..._Np, size_t ..._Extra> struct __repeat<integer_sequence<_Tp, _Np...>, _Extra...> { + typedef integer_sequence<_Tp, + _Np..., + sizeof...(_Np) + _Np..., + 2 * sizeof...(_Np) + _Np..., + 3 * sizeof...(_Np) + _Np..., + 4 * sizeof...(_Np) + _Np..., + 5 * sizeof...(_Np) + _Np..., + 6 * sizeof...(_Np) + _Np..., + 7 * sizeof...(_Np) + _Np..., + _Extra...> type; +}; + +template<size_t _Np> struct __parity; +template<size_t _Np> struct __make : __parity<_Np % 8>::template __pmake<_Np> {}; + +template<> struct __make<0> { typedef integer_sequence<size_t> type; }; +template<> struct __make<1> { typedef integer_sequence<size_t, 0> type; }; +template<> struct __make<2> { typedef integer_sequence<size_t, 0, 1> type; }; +template<> struct __make<3> { typedef integer_sequence<size_t, 0, 1, 2> type; }; +template<> struct __make<4> { typedef integer_sequence<size_t, 0, 1, 2, 3> type; }; +template<> struct __make<5> { typedef integer_sequence<size_t, 0, 1, 2, 3, 4> type; }; +template<> struct __make<6> { typedef integer_sequence<size_t, 0, 1, 2, 3, 4, 5> type; }; +template<> struct __make<7> { typedef integer_sequence<size_t, 0, 1, 2, 3, 4, 5, 6> type; }; + +template<> struct __parity<0> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type> {}; }; +template<> struct __parity<1> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 1> {}; }; +template<> struct __parity<2> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 2, _Np - 1> {}; }; +template<> struct __parity<3> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 3, _Np - 2, _Np - 1> {}; }; +template<> struct __parity<4> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; }; +template<> struct __parity<5> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; }; +template<> struct __parity<6> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 6, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; }; +template<> struct __parity<7> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 7, _Np - 6, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; }; + +template<typename _Tp, typename _Up> struct __convert { + template<typename> struct __result; + template<_Tp ..._Np> struct __result<integer_sequence<_Tp, _Np...> > { typedef integer_sequence<_Up, _Np...> type; }; +}; +template<typename _Tp> struct __convert<_Tp, _Tp> { template<typename _Up> struct __result { typedef _Up type; }; }; + +} + +template<typename _Tp, _Tp _Np> using __make_integer_sequence_unchecked = + typename __detail::__convert<size_t, _Tp>::template __result<typename __detail::__make<_Np>::type>::type; + +template <class _Tp, _Tp _Ep> +struct __make_integer_sequence +{ + static_assert(is_integral<_Tp>::value, + "std::make_integer_sequence can only be instantiated with an integral type" ); + static_assert(0 <= _Ep, "std::make_integer_sequence input shall not be negative"); + typedef __make_integer_sequence_unchecked<_Tp, _Ep> type; +}; + +template<class _Tp, _Tp _Np> + using make_integer_sequence = typename __make_integer_sequence<_Tp, _Np>::type; + +template<size_t _Np> + using make_index_sequence = make_integer_sequence<size_t, _Np>; + +template<class... _Tp> + using index_sequence_for = make_index_sequence<sizeof...(_Tp)>; + +#endif // _LIBCPP_STD_VER > 11 + +#if _LIBCPP_STD_VER > 11 +template<class _T1, class _T2 = _T1> +inline _LIBCPP_INLINE_VISIBILITY +_T1 exchange(_T1& __obj, _T2 && __new_value) +{ + _T1 __old_value = _VSTD::move(__obj); + __obj = _VSTD::forward<_T2>(__new_value); + return __old_value; +} +#endif // _LIBCPP_STD_VER > 11 + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP_UTILITY |
