observable.h

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#pragma once
 
#include <memory>
#include <vector>
 
namespace flyby {
    class DisposeBag;

    class Observable : public std::enable_shared_from_this<Observable> {
    public:
        virtual ~Observable() = default;
        virtual void dispose() {}

        virtual void disposed_by(DisposeBag& bag);
    };

    class DisposeBag {
    public:
        DisposeBag() = default;
 
        virtual ~DisposeBag();

        void dispose_all();

        void add(const std::shared_ptr<Observable>& observable);
 
    private:
        std::vector<std::shared_ptr<Observable>> m_observables;
    };
}  // namespace flyby