import Foundation
let pattern = #"[^\w](?<!->)(trans|trans_choice|Lang::get|Lang::choice|Lang::trans|Lang::transChoice|@lang|@choice|__)\s*\(\s*((?<![\\])['"])((?:.(?!(?<![\\])\2))*.?)\2\s*[,\)]"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = #"""
Should match variations on method:
trans('a.b');
trans_choice('a.b')
Lang::get('a.b');
Lang::choice('a.b', 1);
Lang::trans('a.b');
Lang::transChoice('a.b', 2);
@lang('language.line')
@choice('language.line', 1);
__('a.b')
Should match variations of contained string
trans('key'); // No group, so JSON style
__('Json string')
trans('a.b');
trans('a.b.c');
trans('a_b.c-d');
trans('a.b!');
trans('a.translate me!');
trans('a.über~');
trans("app.i'm"); // contained quote of different type
trans('app."ok"');
trans('with contained " quotes');
trans('with an escaped \' quote')
trans('with a double \\')
Should match additional variables and whitespace
trans('a.b', [1,2]);
trans (
' with whitespace ' , $var)
Typical use cases
(trans ( 'lang.line'));
<span>@lang('lang.line')</span>
Should not match:
trans($var); // No quotes
trans(); // Nothing
anytrans('group.key'); // not the method we need
1trans('lang.file'); // not the method
_trans('lang.file'); // not the method
->trans('lang.line');
trans(\'why do we have an escaped quote here?\')
trans('with a triple \\\') <-- fail!
trans('lang.line' . $middle); // concatenated vars
trans('lang.line' . $middle . '.ending'); // concatenated vars
___('hello') // not the method we need
"""#
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