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Pair

pair

Class

The library includes templates for heterogeneous pairs of values.

T1 first	Instance Variable of pair
T2 second	Instance Variable of pair

pair ()	Constructor on pair
pair (const T1& x, const T2& y)	Constructor on pair
==	Operator on pair
<	Operator on pair

template 
struct pair {
    T1 first;
    T2 second;
    pair() {}
    pair(const T1& x, const T2& y) : first(x), second(y) {}
};

template 
inline bool operator==(const pair& x, const pair& y) {
    return x.first == y.first && x.second == y.second;
}

template 
inline bool operator<(const pair& x, const pair& y) {
    return x.first < y.first || (!(y.first < x.first) && x.second < y.second);
}

pair<T1, T2> make_pair (

Function

The library provides a matching template function make_pair to simplify their construction. Instead of saying, for example, return pair(5, 3.1415926); // explicit types one may say return make_pair(5, 3.1415926); // types are deduced

template 
inline pair make_pair(const T1& x, const T2& y) {
    return pair(x, y);
}