Class MovableOnly

tests/channel_test.cpp:335–374

}

class MovableOnly {
   public:
    explicit MovableOnly(int value) : value_{value} {}

    MovableOnly() = default;

    MovableOnly(const MovableOnly&)
    {
        std::cout << "Copy constructor should not be called";
        std::abort();
    }

    MovableOnly(MovableOnly&& other) noexcept : value_{other.value_} { other.value_ = 0; }

    MovableOnly& operator=(const MovableOnly& other)
    {
        if (this == &other) {
            return *this;
        }
        std::cout << "Copy assignment should not be called";
        std::abort();
    }

    MovableOnly& operator=(MovableOnly&& other) noexcept
    {
        if (this != &other) {
            value_ = other.value_;
            other.value_ = 0;
        }

        return *this;
    }

    int get_value() const { return value_; }

    virtual ~MovableOnly() = default;

   private:
    int value_{0};
};

TEST(ChannelTest, Transform)
{