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weak_ptr
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//g++ 5.4.0 #include <iostream> #include <memory> #include <vector> struct Component: public std::enable_shared_from_this<Component> { std::vector<std::shared_ptr<Component>> children; std::weak_ptr<Component> parent; void add(std::shared_ptr<Component> v) { children.push_back(std::move(v)); children.back()->parent = shared_from_this(); } Component() { std::cout << "Component::Component()" << std::endl; } ~Component() { std::cout << "Component::~Component()" << std::endl; } }; int main() { std::shared_ptr<Component> component1 = std::make_shared<Component>(); std::shared_ptr<Component> component2 = std::make_shared<Component>(); component1->add(std::move(component2)); }
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Compilation time: 0.63 sec, absolute running time: 0.07 sec, cpu time: 0.01 sec, memory peak: 3 Mb, absolute service time: 0,71 sec
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Component::Component() Component::Component() Component::~Component() Component::~Component()