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pair
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pair
Utility Class
- Summary
- Data Type and Member Function Indexes
- Synopsis
- Description
- Interface
- Constructors and Destructors
- Non-member Operators
- Non-member Functions
Summary
A template for heterogeneous pairs of values.
Data Type and Member Function Indexes
(exclusive of constructors and destructors)
| Member Functions |
| make_pair() operator!=() operator<() operator<=() operator==() ()">operator>() =()">operator>=() |
Synopsis
#include <utility> template <class T1, class T2> struct pair ;
Description
The pair class provides a template for encapsulating pairs of values that may be of different types.
Interface
template <class T1, class T2>
struct pair {
T1 first;
T2 second;
pair();
pair (const T1&, const T2&);
~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&);
Constructors and Destructors
pair ();
Default constructor. Initializes first and second using their default constructors.
pair (const T1& x, const T2& y);
The constructor creates a pair of types T1 and T2, making the necessary conversions in x and y.
~pair ();
Destructor.
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. Otherwise 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.
©Copyright 1996, Rogue Wave Software, Inc.
