Created
August 11, 2014 18:08
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Creating a regular expression object from a String literal
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class Regex { | |
let pattern: String | |
let options: NSRegularExpressionOptions! | |
private var matcher: NSRegularExpression { | |
return NSRegularExpression(pattern: self.pattern, options: nil, error: nil) | |
} | |
required init(pattern: String, options: NSRegularExpressionOptions = nil) { | |
self.pattern = pattern | |
self.options = options | |
} | |
func match(string: String, options: NSMatchingOptions = nil) -> Bool { | |
return self.matcher.numberOfMatchesInString(string, options: options, range: NSMakeRange(0, string.utf16Count)) != 0 | |
} | |
} | |
extension Regex: StringLiteralConvertible, ExtendedGraphemeClusterLiteralConvertible { | |
typealias ExtendedGraphemeClusterLiteralType = StringLiteralType | |
class func convertFromExtendedGraphemeClusterLiteral(value: ExtendedGraphemeClusterLiteralType) -> Self { | |
return self(pattern: value) | |
} | |
class func convertFromStringLiteral(value: StringLiteralType) -> Self { | |
return self(pattern: value) | |
} | |
} | |
// MARK: - | |
protocol RegularExpressionMatchable { | |
func match(regex: Regex) -> Bool | |
} | |
infix operator =~ { associativity left precedence 130 } | |
func =~<T: RegularExpressionMatchable> (left: T, right: Regex) -> Bool { | |
return left.match(right) | |
} | |
extension String: RegularExpressionMatchable { | |
func match(regex: Regex) -> Bool { | |
return regex.match(self) | |
} | |
} | |
"foo" =~ "f" // true |
I'm assuming you intended to pass self.options to the NSRegularExpression c'tor when creating the matcher.
Thank you! Great! Your code was working in my project until i (to bad) updated to Xcode 6.1, now i am getting 3 errors in extension Regex: Type 'Regex' does not confirm to protocol 'StringLiteralConvertible'; to protocol 'Unicode ScalarLiteralConvertible'; to protocol 'ExtendedGraphemeClusterLiteralConvertible'.
I've taken this and updated it for the current version of Xcode, and also made it so you can use an actual NSRegularExpression as the RHS. See https://gist.github.com/grosch/d3daeec1eefcf1614442
hi I update it for swift 1.2 https://gist.github.com/SuperMarioBean/38a5255fc1b14fb74739
thank you for this!
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Awesome! Why isn't this part of Swift? ;-)