import Foundation
let pattern = #"\b[A-Za-z2]+(?=\()(?![^']*'!)"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = #"""
=VLOOKUP($A9,'Summary'!$A$10:$C$30,3,FALSE)
=IFERROR((C10/B10),"N/A")
='New Chart Data (Date)'!L70
=IFERROR((C10/B10),Len(E30))
='New Chart Data(Date)'!L70 + (Len(5)&ROW())
=INDEX(C$3:C$12,MATCH(9^99,IF(MAX(IF(ABS($B$3:$B$12-$B18)=MIN(IF($A$3:$A$12=$A18,ABS($B$3:$B$12-$B18),999)),B$3:B$12))=IF(ABS($B$3:$B$12-$B18)=MIN(IF($A$3:$A$12=$A18,ABS($B$3:$B$12-$B18),999)),B$3:B$12),IF(ABS($B$3:$B$12-$B18)=MIN(IF($A$3:$A$12=$A18,ABS($B$3:$B$12-$B18),999)),C$3:C$12))))
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let substitutionString = #"6"#
let result = regex.stringByReplacingMatches(in: testString, range: stringRange, withTemplate: substitutionString)
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