cpp-course/modules/09_cpp11/include/constexpr_nullptr.hpp

#pragma once

#include <cstddef>

namespace cpp11 {

enum class Color { Red, Green, Blue };

[[nodiscard]] auto to_index(Color color) -> int;
[[nodiscard]] constexpr auto square(const int value) -> int { return value * value; }
[[nodiscard]] auto find_null(int* ptr) -> int*;

}  // namespace cpp11