std::unique_ptr::operator[]

1	`T& operator[](size_t` `i)` `const;`

(since C++11)

operator[] provides access to elements of an array managed by a unique_ptr.

The parameter i is required to be a valid array index.

Parameters

the index of the element to be returned

Return value

Returns the element at index i, i.e. get()[i].

Example

#include <iostream>
#include <memory>
  
int main() 
{
    const int size = 10; 
    std::unique_ptr<int[]> fact(new int[size]);
  
    for (int i = 0; i < size; ++i) {
        fact[i] = (i == 0) ? 1 : i * fact[i-1];
    }
  
    for (int i = 0; i < size; ++i) {
        std::cout << i << ": " << fact[i] << '\n';
    }
}

Output:

std::unique_ptr::operator[]

Parameters

Return value

Example

See also