---
title: StringProtocol Implementations
framework: swift
role: collectionGroup
role_heading: API Collection
path: swift/substring/stringprotocol-implementations
---

# StringProtocol Implementations

## Topics

### Structures

- [Substring.UTF16View](swift/substring/utf16view.md)
- [Substring.UTF8View](swift/substring/utf8view.md)
- [Substring.UnicodeScalarView](swift/substring/unicodescalarview.md)

### Operators

- [!=(_:_:)](swift/substring/!=(_:_:)-fryj.md)
- [==(_:_:)](swift/substring/==(_:_:).md)
- [>(_:_:)](swift/substring/_(_:_:)-6o7pz.md)
- [<(_:_:)](swift/substring/_(_:_:)-8d1w2.md)
- [<=(_:_:)](swift/substring/_=(_:_:)-5y23r.md)
- [>=(_:_:)](swift/substring/_=(_:_:)-nd7a.md)

### Initializers

- [init(cString:)](swift/substring/init(cstring:).md)
- [init(decoding:as:)](swift/substring/init(decoding:as:).md)
- [init(decodingCString:as:)](swift/substring/init(decodingcstring:as:).md)

### Instance Properties

- [unicodeScalars](swift/substring/unicodescalars.md)
- [utf16](swift/substring/utf16.md)
- [utf8](swift/substring/utf8.md)

### Instance Methods

- [hasPrefix(_:)](swift/substring/hasprefix(_:).md)
- [hasSuffix(_:)](swift/substring/hassuffix(_:).md)
- [hash(into:)](swift/substring/hash(into:).md)
- [lowercased()](swift/substring/lowercased().md)
- [uppercased()](swift/substring/uppercased().md)
- [withCString(_:)](swift/substring/withcstring(_:).md)
- [withCString(encodedAs:_:)](swift/substring/withcstring(encodedas:_:).md)