I need to match a string that has either a prefix, or a suffix.

So far, I've done this:

(?i)(?:(?:Localized(?:App)?String\(@))?\"(. ?)\".(?:localized)?

Testing this regex against the scenario below, it works well, except for the first line, where I should have no matches:

print("Error: should NOT capture!")
NSLocalizedAppString(@"Contextual Menu",nil)];
self.setTitleStates(["Unmute1".localized, "Mute".localized])
NSApplication.localizedString("Paused", comment: "")
print("Remove from Set".localized)

How do I mutually exclude the prefix group with the suffix group?

Thanks!

CodePudding user response：

You can use

(?si)Localized(?:App)?String\(@?"([^"\\]*(?:\\.[^"\\]*)*)"|"([^"\\]*(?:\\.[^"\\]*)*)"\.localized

See the regex demo. Details:

• (?si) - dot now matches line breaks and i makes the pattern case insensitive
• Localized - a word
• (?:App)? - an optional App string
• String\( - a String( text
• @? - an optional @
• "([^"\\]*(?:\\.[^"\\]*)*)" - a "..." string literal pattern with escape sequences support
• | - or
• "([^"\\]*(?:\\.[^"\\]*)*)" - a "..." string literal pattern with escape sequences support
• \.localized - .localized string.