《BOOST程序库完全开发指南》 第08章 算法

<boost/foreach.hpp>   提供两个宏：BOOST_FOREACH 和 BOOST_REVERSE_FOREACH

#include <string>
#include <boost/foreach.hpp>
#include <boost/assign.hpp>
#include <boost/typeof/typeof.hpp>

int main()
{
    std::vector<int> vect = boost::assign::list_of(1)(2)(3);
    BOOST_FOREACH(int x,vect)   //BOOST_FOREACH 与 BOOST_REVERSE_FOREACH 都是宏
    {
        std::cout<<x<<",";
    }
    std::string str = "Hello";
    std::cout<<"\n";
    BOOST_REVERSE_FOREACH(char& c,str)
    {
        std::cout<<c<<",";
    }
    std::cout<<"\n";
    BOOST_FOREACH(BOOST_TYPEOF(*str.begin()) c,str) //配合 BOOST_TYPEOF 来使用匿名类型
    {
        std::cout<<c<<",";
    }
}