The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference, 2nd Edition
by Nicolai M. Josuttis, Addison Wesley Longman, 2012
Copyright © 2012 by Pearson Education, Inc. and Nicolai M. Josuttis
#include <algorithm>
#include <deque>
#include <string>
#include <iostream>
using namespace std;
class Person {
public:
string firstname() const;
string lastname() const;
//...
};
int main()
{
deque<Person> coll;
//...
// sort Persons according to lastname (and firstname):
sort(coll.begin(),coll.end(), // range
[] (const Person& p1, const Person& p2) { // sort criterion
return p1.lastname()<p2.lastname() ||
(p1.lastname()==p2.lastname() &&
p1.firstname()<p2.firstname());
});
//...
}