pythonic++ - A small C++ convenience library

pythonic++ brings some python-style programming to C++ for ease, fun and more expressive code (see examples below).

enumerate()

The enumerate(Container [, start]) function can be used to count the iterations over an STL conform container. Optionally, the value to start counting from can be provided.

#include <vector>
#include <iostream>
#include "pythonic/enumerate.h"
using namespace pythonic;

// ...

typedef std::vector<int> vec;

for (auto v : enumerate(vec {0, -1337, 42}))
{
  std::cout << v.first << " " << v.second << std::endl;
}

// ...

zip()

The zip([Container, ...]) function can be used to iterate over several containers in lockstep. The number of iterations is determined by the length of the shortest container.

#include <vector>
#include <map>
#include "pythonic/zip.h"
using namespace pythonic;

// ...

std::map<int, float> m;

// ...

std::vector<int>   keys(m.size());
std::vector<float> values(m.size());

for (auto v : zip(m, keys, values))
{
  std::get<1>(v) = std::get<0>(v).first;
  std::get<2>(v) = std::get<0>(v).second;
}

// ...

In the example, two vectors are filled with the keys and values from a map.

range()

The functions range(end) and range(start, end [, step]) can be used as iterateable representations of ranges.

#include <vector>
#include "pythonic/zip.h"
using namespace pythonic;

// ...

std::vector<int> vec = {324,5,435,12,3,23,4};

for (auto const& v  : zip(range(vec.size()), vec))
{
  std::cout << std::get<0>(v) << " " << std::get<1>(v) << std::endl;
}

// ...

In this example, we implemented enumerate() by means of range and zip.

Requirements

The library requires a modern compiler supporting C++11.

Licensing

Copyright (c) 2013, Sebastian Jeltsch (sjeltsch@kip.uni-heidelberg.de)

Distributed under the terms of the GPLv2 or newer.