std::shared_ptr<T>::operator[]
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< cpp | memory | shared ptr
C++
Memory management library
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std::shared_ptr
Member functions | ||||
Modifiers | ||||
Observers | ||||
shared_ptr::operator[] (C++17) |
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(until C++20*)
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(C++26)
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(C++26)
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Non-member functions | ||||
(until C++20)
(until C++20)
(until C++20)
(until C++20)
(until C++20)
(C++20)
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functions (until C++26*)
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Helper classes | ||||
(C++20)
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Deduction guides(C++17) |
element_type& operator[
]
(
std::ptrdiff_t idx )
const
;
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(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
Run this code
#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) |