std::enable_shared_from_this<T>::enable_shared_from_this (3) - Linux Manuals

std::enable_shared_from_this<T>::enable_shared_from_this: std::enable_shared_from_this<T>::enable_shared_from_this

NAME

std::enable_shared_from_this<T>::enable_shared_from_this - std::enable_shared_from_this<T>::enable_shared_from_this

Synopsis

constexpr enable_shared_from_this() noexcept; (1) (since C++11)
enable_shared_from_this( const enable_shared_from_this<T>&obj ) noexcept; (2) (since C++11)

Constructs a new enable_shared_from_this object. The private std::weak_ptr<T> member is value-initialized.

Parameters

obj - an enable_shared_from_this to copy

Notes

There is no move constructor: moving from an object derived from shared_from_this does not transfer its shared identity.

Example

// Run this code

  #include <memory>

  struct Foo : public std::enable_shared_from_this<Foo> {
      Foo() {} // implicitly calls enable_shared_from_this constructor
      std::shared_ptr<Foo> getFoo() { return shared_from_this(); }
  };

  int main() {
      std::shared_ptr<Foo> pf1(new Foo);
      auto pf2 = pf1->getFoo(); // shares ownership of object with pf1
  }