fork download 
  1. #include <vector>
  2. #include <string>
  3. #include <iostream>
  4.  
  5. #include <boost/function.hpp>
  6. #include <boost/bind.hpp>
  7.  
  8. using namespace std;
  9.  
  10. struct constrain{
  11.   typedef boost::function<double(vector <double> &x_var)> callback_t;
  12.   string                              name;
  13.   int                            direction;
  14.   callback_t evaluate;
  15. };
  16.  
  17. double func1(constrain *obj, vector<double> &p) {
  18.   cout << obj->name << ", " << obj->direction << ", " << p.size() << endl;
  19. }
  20.  
  21. int main() {
  22.   constrain ob;
  23.   ob.name = "o";
  24.   ob.direction = 1;
  25.   vector<double> v(5);
  26.  
  27.   ob.evaluate = boost::bind(&func1, &ob, _1);
  28.   ob.evaluate(v);
  29. }
Success #stdin #stdout 0.01s 2864KB
comments (?)
stdin 
Standard input is empty
stdout 
o, 1, 5
https://ideone.com/wF8Bz
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!