Cannot recognize "(?!0000)\d{4}"

[autobot1122]

var randString = string.Empty;
Xeger xegerGenerator = new Xeger("(?!0000)\d{4}");
randString = xegerGenerator.Generate();

randString = "!00004377";

randString should be any four digits except "0000" (four zeros)

[moodmosaic]

Thank you for reporting this!

Project Fare turns Regular Expressions into Automatons by applying the algorithms of dk.brics.automaton and xeger.

Unfortunately, I don't have an answer to your question, as Project Fare is really a port of the above Java projects. – We'd have to try

!00004377

in Java and compare the results.

You may use a different pattern or use a different engine to reverse the Regular Expression into an Automaton. As an example, you can use the Rex engine.

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I've now also updated the README to include the above.