random_bites.hpp

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#ifndef EAGINE_RANDOM_BITES_HPP
#define EAGINE_RANDOM_BITES_HPP
 
#include "biteset.hpp"
#include "instead_of.hpp"
#include "int_constant.hpp"
#include <random>
 
namespace eagine {
//------------------------------------------------------------------------------
template <
  std::size_t B,
  typename T,
  std::size_t... I,
  typename Distribution,
  typename Engine>
auto make_random_biteset(
  std::index_sequence<I...>,
  Distribution& dist,
  Engine& engine) {
    using R = biteset<sizeof...(I), B, T>;
    return R{instead_of_t<size_constant<I>, Distribution&>(dist)(engine)...};
}
//------------------------------------------------------------------------------
template <std::size_t B, typename T, std::size_t... I, typename Engine>
auto make_random_biteset(
  std::index_sequence<I...> idx_seq,
  T min,
  T max,
  Engine& engine) {
    std::uniform_int_distribution<T> dist(min, max);
    return make_random_biteset<B, T>(idx_seq, dist, engine);
}
//------------------------------------------------------------------------------
template <std::size_t N, std::size_t B, typename T, typename Engine>
auto random_biteset(T min, T max, Engine& engine) -> biteset<N, B, T> {
    return make_random_biteset<B, T>(
      std::make_index_sequence<N>(), min, max, engine);
}
//------------------------------------------------------------------------------
template <std::size_t N, std::size_t B, typename T>
auto random_biteset(T min, T max) -> biteset<N, B, T> {
    std::random_device engine;
    return make_random_biteset<B, T>(
      std::make_index_sequence<N>(), min, max, engine);
}
//------------------------------------------------------------------------------
} // namespace eagine
 
#endif // EAGINE_RANDOM_BITES_HPP