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wenjinghuan999/shared_from_this_passkey_idiom.cpp

Created October 18, 2022 09:17
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Use passkey idiom when you want enable_shared_from_this to use make_shared
Raw
shared_from_this_passkey_idiom.cpp
#include <memory>
class A : public std::enable_shared_from_this<A> {
private:
struct key{ explicit key() = default; };
public:
static std::shared_ptr<A> create() {
return std::make_shared<A>(key{});
}
explicit A(key) {}
};
int main() {
auto a1 = A::create();
// auto a2 = std::make_shared<A>();
// auto a3 = std::shared_ptr<A>(new A());
// A a4;
}
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