/*
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Copyright (c) 1996,1997
 * Silicon Graphics Computer Systems, Inc.
 *
 * Copyright (c) 1997
 * Moscow Center for SPARC Technology
 *
 * Copyright (c) 1999 
 * Boris Fomitchev
 *
 * This material is provided "as is", with absolutely no warranty expressed
 * or implied. Any use is at your own risk.
 *
 * Permission to use or copy this software for any purpose is hereby granted 
 * without fee, provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 *
 */


/* NOTE: This is an internal header file, included by other STL headers.
 *   You should not attempt to use it directly.
 */

#ifndef _STLP_INTERNAL_PAIR_H
#define _STLP_INTERNAL_PAIR_H

#include <stl/_construct.h>

_STLP_BEGIN_NAMESPACE

#ifdef _STLP_USE_TRAP_LEAVE
template <class _T1, class _T2>
struct pair {
  typedef _T1 first_type;
  typedef _T2 second_type;

  _T1 first;
  _STLP_StackPusher<_T1> __pusher;
  _T2 second;

  // first and second should construct themselves with their default constructors in ANSI order
  pair() : __pusher(&first) {
    CleanupStack::Pop();
  }

  pair(const _T1& __a, const _T2& __b) : first(__a), __pusher(&first), second(__b) {
    CleanupStack::Pop();
  }

  // undergroud extensions
  pair(const _T1& __a, __false_type) : first(__a), __pusher(&first), second() {
    CleanupStack::Pop();
  }
  pair(__true_type, const _T2& __a) : first(), __pusher(&first), second(__a) {
    CleanupStack::Pop();
  }

#if defined (_STLP_MEMBER_TEMPLATES) && !(defined (_STLP_MSVC) && (_STLP_MSVC < 1200))
  template <class _U1, class _U2>
  pair(const pair<_U1, _U2>& __p) : first(__p.first), __pusher(&first), second(__p.second) {
    CleanupStack::Pop();
  }

  pair(const pair<_T1,_T2>& __o) : first(__o.first), __pusher(&first), second(__o.second) {
    CleanupStack::Pop();
  }
#endif
  __TRIVIAL_DESTRUCTOR(pair)
};

#else

template <class _T1, class _T2>
struct pair {
  typedef _T1 first_type;
  typedef _T2 second_type;

  _T1 first;
  _T2 second;
# if defined (_STLP_CONST_CONSTRUCTOR_BUG)
  pair() {}
# else
  pair() : first(_T1()), second(_T2()) {}
# endif
  pair(const _T1& __a, const _T2& __b) : first(__a), second(__b) {}

  // undergroud extensions
  pair(const _T1& __a, __false_type) : first(__a), second() {}
  pair(const _T2& __a, __true_type) : first(), second(__a) {}

#if defined (_STLP_MEMBER_TEMPLATES) && !(defined (_STLP_MSVC) && (_STLP_MSVC < 1200))
  template <class _U1, class _U2>
  pair(const pair<_U1, _U2>& __p) : first(__p.first), second(__p.second) {}

  pair(const pair<_T1,_T2>& __o) : first(__o.first), second(__o.second) {}
#endif
  __TRIVIAL_DESTRUCTOR(pair)
};
#endif

template <class _T1, class _T2>
inline bool _STLP_CALL 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 bool _STLP_CALL operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
{ 
  return __x.first < __y.first || 
         (!(__y.first < __x.first) && __x.second < __y.second); 
}

#ifdef _STLP_USE_SEPARATE_RELOPS_NAMESPACE

template <class _T1, class _T2>
inline bool _STLP_CALL operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) {
  return !(__x == __y);
}

template <class _T1, class _T2>
inline bool _STLP_CALL operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) {
  return __y < __x;
}

template <class _T1, class _T2>
inline bool _STLP_CALL operator<=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) {
  return !(__y < __x);
}

template <class _T1, class _T2>
inline bool _STLP_CALL operator>=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) {
  return !(__x < __y);
}

#endif /* _STLP_USE_SEPARATE_RELOPS_NAMESPACE */


#if defined(_STLP_FUNCTION_TMPL_PARTIAL_ORDER) && ! defined (_STLP_NO_EXTENSIONS) && ! defined (__BORLANDC__) && ! defined (__DMC__)
template <class _T1, class _T2, int _Sz>
inline pair<_T1, _T2 const*> make_pair(_T1 const& __x,
                                       _T2 const (&__y)[_Sz])
{
  return pair<_T1, _T2 const*>(__x, static_cast<_T2 const*>(__y));
}

template <class _T1, class _T2, int _Sz>
inline pair<_T1 const*, _T2> make_pair(_T1 const (&__x)[_Sz],
                                       _T2 const& __y)
{
  return pair<_T1 const*, _T2>(static_cast<_T1 const*>(__x), __y);
}

template <class _T1, class _T2, int _Sz1, int _Sz2>
inline pair<_T1 const*, _T2 const*> make_pair(_T1 const (&__x)[_Sz1],
                                              _T2 const (&__y)[_Sz2])
{
  return pair<_T1 const*, _T2 const*>(static_cast<_T1 const*>(__x),
                                      static_cast<_T2 const*>(__y));
}
#endif

template <class _T1, class _T2>
inline pair<_T1, _T2> _STLP_CALL make_pair(const _T1& __x, const _T2& __y)
{
  return pair<_T1, _T2>(__x, __y);
}


_STLP_END_NAMESPACE

# if defined (_STLP_USE_NAMESPACES) || ! defined (_STLP_USE_SEPARATE_RELOPS_NAMESPACE) 
_STLP_BEGIN_RELOPS_NAMESPACE

template <class _Tp>
inline bool _STLP_CALL operator!=(const _Tp& __x, const _Tp& __y) {
  return !(__x == __y);
}

template <class _Tp>
inline bool _STLP_CALL operator>(const _Tp& __x, const _Tp& __y) {
  return __y < __x;
}

template <class _Tp>
inline bool _STLP_CALL operator<=(const _Tp& __x, const _Tp& __y) {
  return !(__y < __x);
}

template <class _Tp>
inline bool _STLP_CALL  operator>=(const _Tp& __x, const _Tp& __y) {
  return !(__x < __y);
}

_STLP_END_RELOPS_NAMESPACE

# endif

#endif /* _STLP_INTERNAL_PAIR_H */

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