unsized top-level constant
_Unsized
const unsized
A NativeType annotated with unsized does not have a predefined size.
Unsized NativeTypes do not support sizeOf because their size is unknown, so calling sizeOf with an @unsized NativeType will throw an exception. Consequently, Pointer.elementAt is not available and will also throw an exception.
Implementation
const _Unsized unsized = const _Unsized();