< cpp‎ | memory‎ | shared ptr
Dynamic memory management
Uninitialized storage
Garbage collection support
C Library
Low level memory management
element_type& operator[]( std::ptrdiff_t idx ) const;
(since C++17)

Index into the array pointed to by the stored pointer.

The behavior is undefined if the stored pointer is null or if idx is negative.

If T (the template parameter of shared_ptr) is an array type U[N], idx must be less than N, otherwise the behavior is undefined.


idx - the array index

Return value

A reference to the idx-th element of the array, i.e., get()[idx]




When T is not an array type, it is unspecified whether this function is declared. If the function is declared, it is unspecified what its return type is, except that the declaration (although not necessarily the definition) of the function is guaranteed to be legal.


See also

returns the stored pointer
(public member function)