forked from OSchip/llvm-project
467 lines
12 KiB
C++
467 lines
12 KiB
C++
// -*- C++ -*-
|
|
//===-------------------------- utility -----------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. 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);
|
|
template <class T, size_t N> void swap(T (&a)[N], T (&b)[N]);
|
|
|
|
template <class T, class U> T&& forward(U&&);
|
|
template <class T> typename remove_reference<T>::type&& move(T&&);
|
|
|
|
template <class T>
|
|
typename conditional
|
|
<
|
|
!has_nothrow_move_constructor<T>::value && has_copy_constructor<T>::value,
|
|
const T&,
|
|
T&&
|
|
>::type
|
|
move_if_noexcept(T& x);
|
|
|
|
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;
|
|
constexpr pair();
|
|
pair(const T1& x, const T2& y);
|
|
template <class U, class V> pair(U&& x, V&& y);
|
|
template <class U, class V> pair(const pair<U, V>& p);
|
|
template <class U, class V> pair(pair<U, V>&& p);
|
|
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);
|
|
template <class U, class V> pair& operator=(pair<U, V>&& p);
|
|
|
|
void swap(pair& p);
|
|
};
|
|
|
|
template <class T1, class T2> bool operator==(const pair<T1,T2>&, const pair<T1,T2>&);
|
|
template <class T1, class T2> bool operator!=(const pair<T1,T2>&, const pair<T1,T2>&);
|
|
template <class T1, class T2> bool operator< (const pair<T1,T2>&, const pair<T1,T2>&);
|
|
template <class T1, class T2> bool operator> (const pair<T1,T2>&, const pair<T1,T2>&);
|
|
template <class T1, class T2> bool operator>=(const pair<T1,T2>&, const pair<T1,T2>&);
|
|
template <class T1, class T2> bool operator<=(const pair<T1,T2>&, const pair<T1,T2>&);
|
|
|
|
template <class T1, class T2> pair<V1, V2> make_pair(T1&&, T2&&);
|
|
template <class T1, class T2> void swap(pair<T1, T2>& x, pair<T1, T2>& 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>&);
|
|
|
|
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>&);
|
|
|
|
} // std
|
|
|
|
*/
|
|
|
|
#include <__config>
|
|
#include <__tuple>
|
|
#include <type_traits>
|
|
|
|
#pragma GCC system_header
|
|
|
|
_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 _N>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
swap(_Tp (&__a)[_N], _Tp (&__b)[_N])
|
|
{
|
|
_STD::swap_ranges(__a, __a + _N, __b);
|
|
}
|
|
|
|
template <class _Tp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
typename conditional
|
|
<
|
|
!has_nothrow_move_constructor<_Tp>::value && has_copy_constructor<_Tp>::value,
|
|
const _Tp&,
|
|
_Tp&&
|
|
>::type
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
const _Tp&
|
|
#endif
|
|
move_if_noexcept(_Tp& __x)
|
|
{
|
|
return _STD::move(__x);
|
|
}
|
|
|
|
struct _LIBCPP_VISIBLE piecewise_construct_t { };
|
|
//constexpr
|
|
extern const piecewise_construct_t piecewise_construct;// = piecewise_construct_t();
|
|
|
|
template <class _T1, class _T2> struct pair;
|
|
template <class _T1, class _T2> void swap(pair<_T1, _T2>&, pair<_T1, _T2>&);
|
|
|
|
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) {}
|
|
|
|
#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
|
|
pair(_U1&& __u1, _U2&& __u2)
|
|
: first(_STD::forward<_U1>(__u1)),
|
|
second(_STD::forward<_U2>(__u2))
|
|
{}
|
|
|
|
#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(_STD::forward<typename tuple_element<0,
|
|
typename __make_tuple_types<_Tuple>::type>::type>(get<0>(__p))),
|
|
second(_STD::forward<typename tuple_element<1,
|
|
typename __make_tuple_types<_Tuple>::type>::type>(get<1>(__p)))
|
|
{}
|
|
|
|
template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2>
|
|
_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 = _STD::forward<_U0>(_STD::get<0>(__p));
|
|
second = _STD::forward<_U1>(_STD::get<1>(__p));
|
|
return *this;
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_VARIADICS
|
|
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
template<class _U1, class _U2>
|
|
_LIBCPP_INLINE_VISIBILITY pair(const pair<_U1, _U2>& __p)
|
|
: first(__p.first), second(__p.second) {}
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
void _LIBCPP_INLINE_VISIBILITY swap(pair& __p) {_STD::swap(*this, __p);}
|
|
private:
|
|
|
|
#ifndef _LIBCPP_HAS_NO_VARIADICS
|
|
template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2>
|
|
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
|
|
void
|
|
swap(pair<_T1, _T2>& __x, pair<_T1, _T2>& __y)
|
|
{
|
|
swap(__x.first, __y.first);
|
|
swap(__x.second, __y.second);
|
|
}
|
|
|
|
#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>
|
|
(_STD::forward<_T1>(__t1), _STD::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) {return __p.first;}
|
|
|
|
template <class _T1, class _T2>
|
|
static
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const _T1&
|
|
get(const pair<_T1, _T2>& __p) {return __p.first;}
|
|
};
|
|
|
|
template <>
|
|
struct __get_pair<1>
|
|
{
|
|
template <class _T1, class _T2>
|
|
static
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_T2&
|
|
get(pair<_T1, _T2>& __p) {return __p.second;}
|
|
|
|
template <class _T1, class _T2>
|
|
static
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const _T2&
|
|
get(const pair<_T1, _T2>& __p) {return __p.second;}
|
|
};
|
|
|
|
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)
|
|
{
|
|
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)
|
|
{
|
|
return __get_pair<_Ip>::get(__p);
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_VARIADICS
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_UTILITY
|