#ifndef _LIBCPP_UTILITY
#define _LIBCPP_UTILITY
#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);
}
}
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
#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_VISIBLE piecewise_construct_t { };
extern const piecewise_construct_t piecewise_construct;
template <class _T1, class _T2>
struct _LIBCPP_VISIBLE pair
{
typedef _T1 first_type;
typedef _T2 second_type;
_T1 first;
_T2 second;
_LIBCPP_INLINE_VISIBILITY pair() : first(), second() {}
_LIBCPP_INLINE_VISIBILITY pair(const _T1& __x, const _T2& __y)
: first(__x), second(__y) {}
template<class _U1, class _U2>
_LIBCPP_INLINE_VISIBILITY
pair(const pair<_U1, _U2>& __p
#ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE
,typename enable_if<is_constructible<_T1, _U1>::value &&
is_constructible<_T2, _U2>::value>::type* = 0
#endif
)
: first(__p.first), second(__p.second) {}
_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)
{
}
_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_constructible<first_type, _U1 >::value &&
is_constructible<second_type, _U2>::value>::type>
_LIBCPP_INLINE_VISIBILITY
pair(_U1&& __u1, _U2&& __u2)
: first(_VSTD::forward<_U1>(__u1)),
second(_VSTD::forward<_U2>(__u2))
{}
template<class _U1, class _U2>
_LIBCPP_INLINE_VISIBILITY
pair(pair<_U1, _U2>&& __p,
typename enable_if<is_constructible<_T1, _U1>::value &&
is_constructible<_T2, _U2>::value>::type* = 0)
: first(_VSTD::forward<_U1>(__p.first)),
second(_VSTD::forward<_U2>(__p.second)) {}
_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))
{
}
_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
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
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
bool
operator!=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
{
return !(__x == __y);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
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
bool
operator> (const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
{
return __y < __x;
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
bool
operator>=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
{
return !(__x < __y);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
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 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
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
#ifndef _LIBCPP_HAS_NO_VARIADICS
template <class _T1, class _T2>
class _LIBCPP_VISIBLE tuple_size<pair<_T1, _T2> >
: public integral_constant<size_t, 2> {};
template <class _T1, class _T2>
class _LIBCPP_VISIBLE tuple_size<const pair<_T1, _T2> >
: public integral_constant<size_t, 2> {};
template <class _T1, class _T2>
class _LIBCPP_VISIBLE tuple_element<0, pair<_T1, _T2> >
{
public:
typedef _T1 type;
};
template <class _T1, class _T2>
class _LIBCPP_VISIBLE tuple_element<1, pair<_T1, _T2> >
{
public:
typedef _T2 type;
};
template <class _T1, class _T2>
class _LIBCPP_VISIBLE tuple_element<0, const pair<_T1, _T2> >
{
public:
typedef const _T1 type;
};
template <class _T1, class _T2>
class _LIBCPP_VISIBLE 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
_T1&
get(pair<_T1, _T2>& __p) _NOEXCEPT {return __p.first;}
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY
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
_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
_T2&
get(pair<_T1, _T2>& __p) _NOEXCEPT {return __p.second;}
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY
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
_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>
_LIBCPP_INLINE_VISIBILITY inline
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>
_LIBCPP_INLINE_VISIBILITY inline
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>
_LIBCPP_INLINE_VISIBILITY inline
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
#endif // _LIBCPP_HAS_NO_VARIADICS
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_UTILITY