Version 5.0 The LEDA User Manual

4.18 Two Tuples ( two tuple )
1. Definition
An instance p of type two tuple 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/core/tuple.h >
2. Types
two tuple:: first type the type of the first component.
two tuple:: second type
3. Creation
the type of the second component.
two tuple p;
creates an instance p of type two tuple. All components
are initialized to their default value.
two tuple p(const A& u, const B& v);
creates an instance p of type two tuple and initializes
it with the value (u, v).
4. 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.
template
bool const two tuple& p == const two tuple& q
equality test for two tuples. Each of the component
types must have an equality operator.
template
int compare(const two tuple& p, const two tuple& q)
template
lexicographic ordering for two tuples. Each of the component
types must have a compare function.