cpp_property

Header only, zero overhead C# - like properties for C++!

struct In{
    int x;
    int y;
};

class Data{
    In m_i;
public:
    auto i(){
        return Property(
           [&]() -> In {
               return {
                   m_i.x * 10,
                   m_i.y * -10
               };
           },
           [&](const auto& i){
               m_i = i;
           }
        );
    }
};

int main(){
   Data data;
   data.i() = In{1,2};
   std::cout
        << data.i()->x
        << data.i()->y;
}

Simple interface:

Property(getter, setter)

Getter() -> T
Getter() -> const T&
Getter() -> const T*

Setter(Args&&...)

Accessors:

operator*() const

operator->() const

get() const

operator T() const

Mutators:

void set(Args&&...)

void operator=(Value&&)

---

const/non const redundancy

From mutable:

    class Data{
        int m_j;
        auto& self_mut() const { return const_cast<Data&>(*this); }
    public:
        auto j() {
            return Property{
                [&]()     { return m_j; },
                [&](int j){ m_j = j; }
            };
        }
        auto j() const {
            return self_mut().j().make_const();
        }
    };

---

See stateless branch for other api.

Requires C++17.