bindings.hpp

// bindings.hpp
class ButtonBindingConcrete : public AbstractButton {
public:
    explicit ButtonBindingConcrete(AbstractButtonBinding *_binding): binding{_binding} {
    }
    // RAII free the pointer on delete
    ~ButtonBindingConcrete()  {
        delete binding;
    }
    void click() override {
        (*binding->click)(binding->context);
    }

    std::string innerText() override {
        char const *text = (*binding->inner_text)(binding->context);
        return std::string(text);
    }
private:
    AbstractButtonBinding *binding;
};