Ruby-esque regex in Swift

swiftRegex.swift

// Regex 

import Foundation

operator infix =~ {}

@infix func =~ (str: String, pattern: String) -> Bool {
    var error: NSError?
    let regex = NSRegularExpression.regularExpressionWithPattern(pattern, options: nil, error: &error)
    if (error) { return false }

    return regex.numberOfMatchesInString(str, options: nil, range: NSMakeRange(0, countElements(str))) > 0
}


"Ayaka" =~ "^A.*" // true
"Ayaka" =~ "Mickey" // false
"Mark" =~ "M..k(ey)?" // true

Nice.

Please note that overriding = instead of = will allow using Regexps in switch statements :-)
(Ref. "Expression Pattern" in The Swift Programming Language)

func ~=(pattern: String, value: String) -> Bool {
    return value =~ pattern
}