typealias Indices = Range<Int>var endIndex: IntThe “past the end” position—that is, the position one greater than the last valid subscript argument.
var startIndex: IntThe position of the first code unit.
subscript(Int) -> UTF16.CodeUnit Accesses the code unit at the specified position.
import Swift@frozen struct UTF16View@frozen enum UnicodeA namespace for Unicode utilities.
@frozen struct ScalarA Unicode scalar value.
@frozen struct Range<Bound> where Bound : ComparableA half-open interval from a lower bound up to, but not including, an upper bound.
@frozen struct IntA signed integer value type.
var endIndex: Int { get }The “past the end” position—that is, the position one greater than the last valid subscript argument.
var startIndex: Int { get }The position of the first code unit.
subscript(position: Int) -> UTF16.CodeUnit { get } Accesses the code unit at the specified position.