Adaptors for Functions

The two functions std::bind and std::functions fit very well together. While std::bind enables you to create new function objects on the fly, std::function takes these temporary function objects and binds them to a variable. Both functions are powerful tools from functional programming and need the header <functional>.

Creating and binding function objects

// bindAndFunction.cpp 
...
#include <functional>
...
// for placehoder _1 and _2
using namespace std::placeholders; f

using std::bind;
using std::function
...
double divMe(double a, double b){ return a/b; };
function < double(double, double) > myDiv1= bind(divMe, _1, _2);
function < double(double) > myDiv2= bind(divMe, 2000, _1);

divMe(2000, 10) == myDiv1(2000, 10) == myDiv2(10);

std::bind and std::function are mostly superfluous

std::bind and std::function, which where part of TR1, are mostly not necessary any more with C++11. You can use lambda functions instead...