text: ////////////////////////////////////////////////////////////
  //
  // Copyright (c) 2018 Jan Filipowicz, Filip Turobos
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in all
  // copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  // SOFTWARE.
  //
  ////////////////////////////////////////////////////////////
  
  #ifndef POINT_EXAMPLE_POINT_BREEDER_H
  #define POINT_EXAMPLE_POINT_BREEDER_H
  
  #include <random>
  #include "point.h"
  
  class point_average {
  public:
  	constexpr point operator()(const point& lhs, const point& rhs) const noexcept;
  };
  
  constexpr point point_average::operator()(const point & lhs, const point & rhs) const noexcept {
  	return {(lhs.x + rhs.x) / 2.0, (lhs.y + rhs.y) / 2.0};
  }
  
  template<class UniformRandomBitGenerator>
  class point_merge_coordinates {
  public:
  	explicit point_merge_coordinates(UniformRandomBitGenerator& g);
  	point operator()(const point& lhs, const point& rhs);
  private:
  	UniformRandomBitGenerator& rand;
  	std::bernoulli_distribution distribution {0.5};
  };
  
  template<class UniformRandomBitGenerator>
  inline point_merge_coordinates<UniformRandomBitGenerator>::point_merge_coordinates(UniformRandomBitGenerator& g)
  	: rand(g) {}
  
  template<class UniformRandomBitGenerator>
  inline point point_merge_coordinates<UniformRandomBitGenerator>::operator()(const point& lhs, const point& rhs) {
  	return distribution(rand) ? point {lhs.x, rhs.y} : point {rhs.x, lhs.y};
  }
  
  #endif
  