Python-like range

This simple header file attempts to mimic the behaviour of the range loop in python.

Usage :

#include "include/range.h"
#include <cstdio>

int main(int, char*[])
{
    for(auto i : range(1, 10 + 1))
    {
        std::printf("%d ", i);
    }
}

Output :

1 2 3 4 5 6 7 8 9 10 

Make sure to enable C++20 in order to be able to use the library. If you cannot use C++20, there is a C++17 fall back header available.

$(CXX) -std=c++20 program.cpp -o a.out

You can omit the first argument and the range will by default start at 0. Example :

#include "include/range.h"
#include <cstdio>

int main(int, char*[])
{
    for(auto i : range(10))
    {
        std::printf("%d ", i);
    }
}

Output :

0 1 2 3 4 5 6 7 8 9

If you’re feeling extra you can even specify the length of a step as a third argument :

#include "include/range.h"
#include <cstdio>

int main(int, char*[])
{
    for(auto i : range(0, -10, -1))
    {
        std::printf("%d ", i);
    }
}

Output :

0 -1 -2 -3 -4 -5 -6 -7 -8 -9