std::enable_shared_from_this<T>::operator=

Since C++11

Does nothing; returns *this.

# Declarations

enable_shared_from_this& operator=( const enable_shared_from_this &rhs ) noexcept;

(since C++11)

# Parameters

rhs: another enable_shared_from_this to assign to *this

# Return value

*this

# Notes

weak_this is not affected by the assignment.

# Example

#include <iostream>
#include <memory>
 
class SharedInt : public std::enable_shared_from_this<SharedInt>
{
public:
    explicit SharedInt(int n) : mNumber(n) {}
    SharedInt(const SharedInt&) = default;
    SharedInt(SharedInt&&) = default;
    ~SharedInt() = default;
 
    // Both assignment operators use enable_shared_from_this::operator=
    SharedInt& operator=(const SharedInt&) = default;
    SharedInt& operator=(SharedInt&&) = default;
 
    int number() const { return mNumber; }
 
private:
    int mNumber;
};
 
int main()
{
    std::shared_ptr<SharedInt> a = std::make_shared<SharedInt>(2);
    std::shared_ptr<SharedInt> b = std::make_shared<SharedInt>(4);
    *a = *b;
 
    std::cout << a->number() << '\n';
}

# See also

shared_ptr