Hi,
I am struggling to find the proper combination of ataptors/binders to use a
member pointer to a member function in a for_each. Is this possible at all?
Any help is appreciated.
Here is the code:
#include <iostream>
#include <algorithm>
#include <vector>
#include
#include
using namespace std;
class foo {
private:
int value;
void default_proc(int& x) {
cout << "default_proc. Value = " << value <<
", Param = " << x << "\n";}
void init1_proc(int& x) {
cout << "init1_proc. Value = " << value <<
", Param = " << x << "\n";}
public:
void (foo::*func_ptr)(int& x); //yes, I need the reference here
foo(int init) :
value(init),
func_ptr(init == 1 ? &foo::init1_proc : &foo::default_proc)
{}
};
int main()
{
vector<foo> foos;
foos.push_back(foo(0));
foos.push_back(foo(1));
foos.push_back(foo(2));
int param = 3;
//i need this functionality:
//prints "default_proc. Value = 0, Param = 3":
(foos[0].*foos[0].func_ptr)(param);
//prints "init1_proc. Value = 1, Param = 3":
(foos[1].*foos[1].func_ptr)(param);
//prints "default_proc. Value = 2, Param = 3":
(foos[2].*foos[2].func_ptr)(param);
//using the right combination of for_each, bind, ref, mem_fn, etc:
// std::for_each(foos.begin(), foos.end(),
// boost::bind(???????),
// _1, boost::ref(param));
}
The compiler is Borland C++ 5.6.4 for Win32.
Thanks in advance
