Definition
An instance p of type two_tuple<A,B> is a two-tuple (a, b) of variables of types A, and B, respectively.
Related types are two_tuple, three_tuple, and four_tuple.
#include < LEDA/tuple.h >
Creation
| two_tuple<A,B> | p | creates an instance p of type two_tuple<A,B>. All components are initialized to their default value. |
| two_tuple<A,B> | p(A u, B v) | creates an instance p of type two_tuple<A,B> and initializes it with the value (u, v). |
Operations
| A& | p.first() | returns the A-component of p. If p is a const-object the return type is A. |
| B& | p.second() | returns the B-component of p. If p is a const-object the return type is B. |
| bool | p == q | equality test for two_tuples. Each of the component types must have an equality operator. |
| int | compare(two_tuple<A,B> p, two_tuple<A,B> q) | |
| lexicographic ordering for two_tuples. Each of the component types must have a compare function. | ||
| int | Hash(two_tuple<A,B> p) | hash function for two_tuples. Each of the component types must have a Hash function. |
Implementation
The obvious implementation is used.