std::less_equal is an STL predicate to perform operator<= on two values.


#include <algorithm>

#include <cassert>

#include <functional>

#include <vector>



int main()

{

  //Create a std::vector with values {0,1,2,3,4,5}

  std::vector<int> v;

  for (int i = 0; i!=6; ++i) v.push_back(i);



  //Count the values less or equal to two

  const int n

    = std::count_if(

        v.begin(),v.end(),

        std::bind2nd(std::less_equal<int>(),2));



  //Assume there are three values less or equal to two

  assert(n==3);

}

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(C++) std::less_equal