Passing C++11 lambda functions in a variable

We are continuing with the previous example, and now we want to use a lambda function with our process_integers() method.

Getting ready

This recipe is continuing the series of the previous two. You must read them first. You will also need a C++11 compatible compiler or at least a compiler with C++11 lambda support.

How to do it...

Nothing needs to be done as boost::function<> is also usable with lambda functions of any difficulty:

#include <deque>
//#include "your_project/process_integers.h"

void sample() {
    // lambda function with no parameters that does nothing 
    process_integers([](int /*i*/){}); 

    // lambda function that stores a reference 
    std::deque<int> ints; 
    process_integers([&ints](int i){ 
        ints.push_back(i); 
    }); 

    // lambda function that modifies its content 
    std::size_t match_count = 0; 
    process_integers([ints, &match_count](int i) mutable { 
        if (ints.front()...