《BOOST程序库完全开发指南》 第11章 函数与回调

第11章  函数回调

#include <iostream>
#include <boost/assign.hpp>
#include <boost/ref.hpp>
#include <boost/typeof/typeof.hpp>

struct Ope
{
    void operator()(int& x){x = x*x;}
};

struct Print
{
    void operator()(int x){std::cout<<x<<"\t";}
};

int main()
{
    std::vector<int> vect = (boost::assign::list_of(1),2,3,4,5);
    std::for_each(vect.begin(),vect.end(),Ope());
    std::for_each(vect.begin(),vect.end(),Print());
    std::cout<<std::endl;                //1,4,9,16,25

    int x(10),y(12);

    boost::reference_wrapper<int> rw(x);
    std::cout<<rw.get()<<std::endl;     //10
    rw = boost::ref(y);
    std::cout<<rw.get()<<std::endl;     //12

    BOOST_AUTO(rw2,boost::ref(rw));
    std::cout<<rw2.get()<<std::endl;    //12
}