Applies the given closure to a mutable view of the string’s characters.
This declaration was obsoleted in Swift 5.0: Please mutate the Substring directly
mutating func withMutableCharacters<R>(_ body: (inout Substring) -> R) -> R Previous versions of Swift provided this view since String itself was not a collection. String is now a collection of characters, so this type is now just an alias for String.
import Swift@frozen struct SubstringA slice of a string.
init() Creates an empty substring.
init(_ content: Substring.UnicodeScalarView) Creates a Substring having the given content.
init(_ content: Substring.UTF8View) Creates a Substring having the given content.
init(_ content: Substring.UTF16View) Creates a Substring having the given content.
init(_ content: String) init<S>(_ elements: S) where S : Sequence, S.Element == Character init(cString nullTerminatedUTF8: UnsafePointer<CChar>) init<C, Encoding>(decoding codeUnits: C, as sourceEncoding: Encoding.Type) where C : Collection, Encoding : _UnicodeEncoding, C.Element == Encoding.CodeUnit init<Encoding>(decodingCString nullTerminatedCodeUnits: UnsafePointer<Encoding.CodeUnit>, as sourceEncoding: Encoding.Type) where Encoding : _UnicodeEncoding init(extendedGraphemeClusterLiteral value: String) init(stringInterpolation: DefaultStringInterpolation) Creates a new instance from an interpolated string literal.
init(stringLiteral value: String) init(unicodeScalarLiteral value: String) var base: String { get }Returns the underlying string from which this substring was derived.
var customMirror: Mirror { get }var debugDescription: String { get }var description: String { get }var endIndex: Substring.Index { get }var isContiguousUTF8: Bool { get }Returns whether this string is capable of providing access to validly-encoded UTF-8 contents in contiguous memory in O(1) time.
var startIndex: Substring.Index { get }var unicodeScalars: Substring.UnicodeScalarView { get set }var utf16: Substring.UTF16View { get set }var utf8: Substring.UTF8View { get set }subscript(i: Substring.Index) -> Character { get } subscript(r: Range<Substring.Index>) -> Substring { get } static func ~= (lhs: Substring, rhs: String) -> Bool mutating func append<S>(contentsOf elements: S) where S : Sequence, S.Element == Character func distance(from start: Substring.Index, to end: Substring.Index) -> Int func filter(_ isIncluded: (Substring.Element) throws -> Bool) rethrows -> String func index(_ i: Substring.Index, offsetBy distance: Int) -> Substring.Index func index(_ i: Substring.Index, offsetBy distance: Int, limitedBy limit: Substring.Index) -> Substring.Index? func index(after i: Substring.Index) -> Substring.Index func index(before i: Substring.Index) -> Substring.Index func lowercased() -> String mutating func makeContiguousUTF8() If this string is not contiguous, make it so. If this mutates the substring, it will invalidate any pre-existing indices.
mutating func replaceSubrange(_ subrange: Range<Substring.Index>, with newElements: Substring) mutating func replaceSubrange<C>(_ subrange: Range<Substring.Index>, with newElements: C) where C : Collection, C.Element == Character func uppercased() -> String func withCString<Result>(_ body: (UnsafePointer<CChar>) throws -> Result) rethrows -> Result func withCString<Result, TargetEncoding>(encodedAs targetEncoding: TargetEncoding.Type, _ body: (UnsafePointer<TargetEncoding.CodeUnit>) throws -> Result) rethrows -> Result where TargetEncoding : _UnicodeEncoding mutating func withUTF8<R>(_ body: (UnsafeBufferPointer<UInt8>) throws -> R) rethrows -> R Runs body over the content of this substring in contiguous memory. If this substring is not contiguous, this will first make it contiguous, which will also speed up subsequent access. If this mutates the substring, it will invalidate any pre-existing indices.
mutating func write(_ other: String) func write<Target>(to target: inout Target) where Target : TextOutputStream @frozen struct UTF16View@frozen struct UTF8View@frozen struct UnicodeScalarViewtypealias Index = String.Indextypealias SubSequence = Substringvar characters: Substring { get set }A view of the string’s contents as a collection of characters.
var customPlaygroundQuickLook: _PlaygroundQuickLook { get }typealias CharacterView = SubstringA view of a string’s contents as a collection of characters.