Method clone

tutorial/MyParams/MyVersionParam.h:17–25

struct MyVersionParam : public CGraph::GElementParam {
    CVoid clone(CGraph::GPassedParamPtr param) override {
        auto* ptr = dynamic_cast<MyVersionParam *>(param);
        if (nullptr == ptr) {
            return;    // 理论不存在的情况
        }

        this->priority_ = ptr->priority_;
        this->secondary_ = ptr->secondary_;
    }

    int priority_ = 0;    // 表示 主版本号
    int secondary_ = 0;    // 表示 辅版本号