Boost::bind使用详解

 1 #include 
 2 #include 
 3 #include <string>
 4 #include 
 5 #include 
 6 #include "boost/bind.hpp"
 7 void main()
 8 {
 9     std::vector<int> ints;
10     ints.push_back(7);
11     ints.push_back(4);
12     ints.push_back(12);
13     ints.push_back(10);
14     int count=std::count_if(ints.begin(),  
15         ints.end(), 
16         boost::bind(std::logical_and<bool>(),boost::bind(std::greater<int>(),_1,5),boost::bind(std::less_equal<int>(),_1,10))
17         );
18     std::cout <'\n';
19     std::vector<int>::iterator int_it=std::find_if(ints.begin(),  
20         ints.end(),  
21         boost::bind(std::logical_and<bool>(),boost::bind(std::greater<int>(),_1,5),boost::bind(std::less_equal<int>(),_1,10))
22         );
23     if (int_it!=ints.end()) 
24     {  std::cout <<*int_it <<'\n';}
25 
26 }

 1 // bind instance or reference
 2 #include 
 3 #include 
 4 #include <string>
 5 #include 
 6 #include 
 7 #include "boost/bind.hpp"
 8 class tracer 
 9 {
10 public: 
11     tracer() {    std::cout <<"tracer::tracer()\n";  } 
12     tracer(const tracer& other) {    std::cout <<"tracer::tracer(const tracer& other)\n";  } 
13     tracer& operator=(const tracer& other)
14     {    std::cout <<"tracer& tracer::operator=(const tracer& other)\n";    return *this;  } 
15     ~tracer() {    std::cout <<"tracer::~tracer()\n"; 
16     } 
17     void print(const std::string& s) const
18     {    std::cout <'\n';  }
19 };
20 
21 void main()
22 {
23     tracer t;
24     boost::bind(&tracer::print,t,_1)(std::string("I'm called on a copy of t\n"));
25     tracer t1;
26     boost::bind(&tracer::print,boost::ref(t1),_1)(  std::string("I'm called directly on t\n"));
27 
28 }