Created
December 1, 2019 05:46
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| #include <functional> | |
| #include <iostream> | |
| class Data { | |
| public: | |
| void set(float v_) { v = v_; } | |
| float get() const { return v; } | |
| void print() const { std::cout << v << std::endl; } | |
| private: | |
| float v = 0.f; | |
| }; | |
| class Float { | |
| public: | |
| Float(std::function<float()> func_get, | |
| std::function<void(float f)> func_set) | |
| : m_func_get(func_get), m_func_set(func_set) {} | |
| float operator=(float rhs) { | |
| m_func_set(rhs); | |
| return rhs; | |
| } | |
| float operator+=(float rhs) { | |
| float v = m_func_get() + rhs; | |
| m_func_set(v); | |
| return v; | |
| } | |
| float operator-=(float rhs) { | |
| float v = m_func_get() - rhs; | |
| m_func_set(v); | |
| return v; | |
| } | |
| float operator*=(float rhs) { | |
| float v = m_func_get() * rhs; | |
| m_func_set(v); | |
| return v; | |
| } | |
| float operator/=(float rhs) { | |
| float v = m_func_get() / rhs; | |
| m_func_set(v); | |
| return v; | |
| } | |
| operator float() const { return m_func_get(); } | |
| private: | |
| std::function<float()> m_func_get; | |
| std::function<void(float f)> m_func_set; | |
| }; | |
| int main(int argc, char const* argv[]) { | |
| Data data; | |
| Float f([&]() { return data.get(); }, [&](float f) { data.set(f); }); | |
| data.print(); | |
| f = 3.f; | |
| data.print(); | |
| f += 1.f; | |
| data.print(); | |
| f -= 10.f; | |
| data.print(); | |
| f = f + 1.f; | |
| data.print(); | |
| f = -f; | |
| data.print(); | |
| return 0; | |
| } |
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