import Foundation
let pattern = #"(?:(?:(?:(?:var|let)[ \t]+)?([\w.\-]+)[ \t]*[:=]|[(!])[ \t]*)function(?:[ \t]+([\w.\-]+))?[ \t]*\([^)]*\)"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
!function(){}() // test1
!function test2(){}() // test2
(function(){})() // test3
(function test4(){})() // test4
test5 = function(){} // test5
test6 = function _test6(){} // test6
let test7 = function(){} // test7
let test8 = function _test8(){} // test8
var test9 = function(){} // test8
var test10 = function _test10(){} // test10
myfunc(function(){}) // test11
myfunc(function test12(){}) // test12
let myobj = {test13 : function(){}} // test13
let myobj = {test14 : function _test14(){}} // test14
var myobj = {test15 : function(){}} // test15
var myobj = {test16 : function _test16(){}} // test16
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression