Regex

Swifty regular expressions

This is a wrapper for NSRegularExpression that makes it more convenient and type-safe to use regular expressions in Swift.

Install

Add the following to Package.swift:

.package(url: "https://github.com/sindresorhus/Regex", from: "0.1.0")
Swift

Or add the package in Xcode.

Usage

First, import the package:

import Regex
Swift

Supported regex syntax.

Examples

Check if it matches:

Regex(#"\d+"#).isMatched(by: "123")
//=> true
Swift

Get first match:

Regex(#"\d+"#).firstMatch(in: "123-456")?.value
//=> "123"
Swift

Get all matches:

Regex(#"\d+"#).allMatches(in: "123-456").map(\.value)
//=> ["123", "456"]
Swift

Replacing first match:

"123?456".replacingFirstMatch(of: #"\d+"#, with: "")
//=> "?456"
Swift

Replacing all matches:

"123?456".replacingAllMatches(of: #"\d+"#, with: "")
//=> "?"
Swift

Named capture groups:

let regex = Regex(#"\d+(?<word>[a-z]+)\d+"#)

regex.firstMatch(in: "123unicorn456")?.group(named: "word")?.value
//=> "unicorn"
Swift

Pattern matching:

switch "foo123" {
case Regex(#"^foo\d+$"#):
	print("Match!")
default:
	break
}

switch Regex(#"^foo\d+$"#) {
case "foo123":
	print("Match!")
default:
	break
}
Swift

Multiline and comments:

let regex = Regex(
	#"""
	^
	[a-z]+  # Match the word
	\d+     # Match the number
	$
	"""#,
	options: .allowCommentsAndWhitespace
)

regex.isMatched(by: "foo123")
//=> true
Swift

API

See the API docs.

GitHub

https://github.com/sindresorhus/Regex