I'm looking to test a regular expression that includes lookbehind with possibly infinite repetition. E.g:
(?<!this can't appear anywhere before.*)text to match
This is just an example - the actual regex is nothing like this so please don't answer with alternative ways of doing this!
According to http://www.regular-expressions.info/lookaround.html, this would be supported by .NET but I couldn't get it to work in any of the regex fiddlers I've tried. Just wondering if anyone has seen this problem or knows of a regex fiddler (ideally online) that uses the .NET framework as its engine?
One site you can use is regexhero.net. Not as user friendly as some other online regex testers as you cannot quickly copy from there and it frequently bugs you for buying it, but the primary purpose is available.