Subscript

subscript(_:)

Accesses the pointee at the specified offset from this pointer.

Declaration

subscript(i: Int) -> Pointee { get nonmutating set }

Parameters

i

The offset from this pointer at which to access an instance, measured in strides of the pointer’s Pointee type.

Discussion

For a pointer p, the memory at p + i must be initialized when reading the value by using the subscript. When the subscript is used as the left side of an assignment, the memory at p + i must be initialized or the pointer’s Pointee type must be a trivial type.

Do not assign an instance of a nontrivial type through the subscript to uninitialized memory. Instead, use an initializing method, such as initialize(to:count:).