std::enable_shared_from_this::operator=(3)

NAME
std::enable_shared_from_this::operator= - std::enable_shared_from_this::operator=

Synopsis
   enable_shared_from_this& operator=( const enable_shared_from_this (since C++11)
   &rhs ) noexcept;
   Does nothing; returns *this.

Parameters
   rhs - another enable_shared_from_this to assign to *this

Return value
   *this

Notes
   The exposition-only std::weak_ptr<T> member weak-this is not affected by this
   assignment operator.

Example
   Note: enable_shared_from_this::operator= is defined as protected in order to prevent
   accidental slicing but allow derived classes to have default assignment operators. // Run this code
 #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';
 }

Output:
 4

See also
   shared_ptr smart pointer with shared object ownership semantics
   (C++11) (class template)