Namespaces
Variants
Views
Actions

std::shared_ptr<T>::operator*, std::shared_ptr<T>::operator->

From cppreference.com
< cpp‎ | memory‎ | shared ptr
 
 
Utilities library
General utilities
Relational operators (deprecated in C++20)
 
Dynamic memory management
Uninitialized memory algorithms
(C++17)
(C++17)
(C++20)
(C++17)
Constrained uninitialized
memory algorithms
C Library

Allocators
Memory resources
Garbage collection support
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
(C++11)(until C++23)
Uninitialized storage
(until C++20*)
(until C++20*)
Explicit lifetime management
 
 
T& operator*() const noexcept;
(1) (since C++11)
T* operator->() const noexcept;
(2) (since C++11)

Dereferences the stored pointer. The behavior is undefined if the stored pointer is null.

Contents

[edit] Parameters

(none)

[edit] Return value

1) The result of dereferencing the stored pointer, i.e., *get().
2) The stored pointer, i.e., get().

[edit] Remarks

When T is an array type or (possibly cv-qualified)(since C++17) void, it is unspecified whether function (1) is declared. If it is declared, it is unspecified what its return type is, except that the declaration (although not necessarily the definition) of the function shall be well formed. This makes it possible to instantiate std::shared_ptr<void>

When T is an array type, it is unspecified whether function (2) is declared. If it is declared, it is unspecified what its return type is, except that the declaration of the function shall be well-formed.

(since C++17)

[edit] Example

#include <iostream>
#include <memory>
 
struct Foo
{
    Foo(int in) : a(in) {}
    void print() const
    {
        std::cout << "a = " << a << '\n';
    }
    int a;
};
 
int main()
{
    auto ptr = std::make_shared<Foo>(10);
    ptr->print();
    (*ptr).print();
}

Output:

a = 10
a = 10

[edit] See also

returns the stored pointer
(public member function) [edit]