/**
 * Parallel Code Count
 * random_string.h
 * Random string generator template.
 */
#pragma once
#include <string>
#include <random>
#include <algorithm>

// uses given distribution (uniform by default) and random generator
template <class Distr = std::uniform_int_distribution<unsigned char>, class Rng = std::mt19937>
class RandomString
{
public:
  RandomString() {}
  explicit RandomString(unsigned seed)
    : rng(seed)  {}

  std::string operator()(std::size_t length)
  {
    std::string result(length, '\0');
    std::generate(result.begin(), result.end(),
      [this]() { return static_cast<char>(distr(rng)); });
    return std::move(result);
  }

private:
  Rng rng;
  Distr distr;
};