std::shared_ptr<T>::operator[]

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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

Parameters

idx - the array index

Return value

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

Exceptions

Throws nothing.

Remarks

When T

Example

#include <cstddef>
#include <iostream>
#include <memory>
 
int main()
{
    const std::size_t arr_size = 10;
    std::shared_ptr<int[]> pis(new int[10]{0, 1, 2, 3, 4, 5, 6, 7, 8, 9});
    for (std::size_t i = 0; i < arr_size; ++i)
        std::cout << pis[i] << ' ';
    std::cout << '\n';
}

Output:

0 1 2 3 4 5 6 7 8 9

See also

returns the stored pointer
(public member function)