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pair(3C++)			       -			    pair(3C++)

Standard C++ Library Copyright 1998, Rogue Wave Software, Inc.

NAME
       pair

	- A template for heterogeneous pairs of values.

SYNOPSIS
       #include <utility>
       template <class T1, class T2>
       struct pair ;

DESCRIPTION
       The pair class is a template for encapsulating pairs of values that may
       be of different types.

INTERFACE
       template <class T1, class T2>
       struct pair {
       typedef T1 first_type;
       typedef T2 second_type;
       T1 first;
       T2 second;
       pair();
       pair (const T1&, const T2&);
       template <class V, class U>
       pair (const pair <V, U>& p);
	~pair();
};

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<;T1,T2> make_pair (const T1&, const T2&);

TYPES
       first_type

   Type of the first element in a pair.

second_type

   Type of the second element in a pair.

CONSTRUCTORS
       pair ();

   Default constructor. Initializes first and second using their default  con‐
   structors.

pair (const T1& x, const T2& y);

   Creates  a  pair  of types T1 and T2, making the necessary conversions in x
   and y.

template <;class V, class U>
pair (const pair <;V, U>& p);

   Copies first and second from the corresponding elements of p.

DESTRUCTORS
       ~pair ();

NON-MEMBER OPERATORS
       template <class T1, class T2>
       bool operator== (const pair<T1, T2>& x,
		 const pair T1, T2>& y);

   Returns true if (x.first == y.first && x.second == y.second) is true.  Oth‐
   erwise it returns false.

template <;class T1, class T2>
bool operator!= (const pair<T1, T2>& x,
		 const pair T1, T2>& y);

   Returns !(x==y).

template <;class T1, class T2>
bool operator<; (const pair<T1, T2>& x,
	       const pair T1, T2>& y);

   Returns  true  if (x.first < y.first || (!(y.first < x.first) && x.second <
   y.second)) is true. Otherwise it returns false.

template <;class T1, class T2>
bool operator> (const pair<T1, T2>& x,
	       const pair T1, T2>& y);

   Returns y < x.

template <;class T1, class T2>
bool operator<;= (const pair<T1, T2>& x,
	       const pair T1, T2>& y);

   Returns !(y < x).

template <;class T1, class T2>
bool operator>= (const pair<T1, T2>& x,
	       const pair T1, T2>& y);

   Returns !(x < y).

NON-MEMBER FUNCTIONS
template <;class T1, class T2>
pair<;T1,T2>
make_pair(x,y);

   make_pair(x,y) creates a pair by deducing and returning the types of x  and
   y.

Rogue Wave Software		  02 Apr 1998			    pair(3C++)

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