C++ example of proposed clamp() used with range-v3 library.

clamp-range-v3.cpp

// clamp-range-v3

#include <iostream>

#include <clamp.hpp>

#include <range/v3/core.hpp>
#include <range/v3/view/iota.hpp>
#include <range/v3/view/remove_if.hpp>
#include <range/v3/view/transform.hpp>

struct is_odd
{
    bool operator()(int i) const
    {
        return (i % 2) == 1;
    }
};

int main()
{
    using namespace ranges;

    auto && rng = 
        view::iota(0, +20) | 
        view::remove_if( is_odd() ) | 
        view::transform( [](int x) { return clamp(x, 5, 15); } );
    
    std::cout << rng;
}

#if 0

g++ -std=c++11 -I"../clamp (Dropbox)" -I../range-v3/include -I.. -o clamp-range-v3.exe clamp-range-v3.cpp && clamp-range-v3.exe

[5,5,5,6,8,10,12,14,15,15]

#endif