any_random_engine.hpp

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#ifndef EAGINE_ANY_RANDOM_ENGINE_HPP
#define EAGINE_ANY_RANDOM_ENGINE_HPP
 
#include "callable_ref.hpp"
 
namespace eagine {
 
template <typename Result>
class any_random_engine : public callable_ref<Result()> {
public:
    using result_type = Result;
 
    template <typename Engine>
    any_random_engine(Engine& engine) noexcept
      : callable_ref<Result()>{construct_from, engine}
      , _min{engine.min()}
      , _max{engine.max()} {}
 
    auto min() const noexcept -> result_type {
        return _min;
    }
 
    auto max() const noexcept -> result_type {
        return _max;
    }
 
private:
    result_type _min{0};
    result_type _max{0};
};
 
template <typename Engine>
any_random_engine(Engine&) -> any_random_engine<typename Engine::result_type>;
 
} // namespace eagine
 
#endif // EAGINE_ANY_RANDOM_ENGINE_HPP