Suggestion

[foo123]

for the regexp test page. Take a look here (another regexp tool of mine), for some ideas to enhance the test page (eg syntax-highlight the regex code, analyse syntax-tree etc). i'm thinking of adding extensive features support to the regex analyser (inluding xregexp features support)

Nikos

[foo123]

Here is a concrete example direct link of what said above http://foo123.github.io/examples/regex-analyzer/#action=statistics&regex=%2F%28%3F%3Cgroup1%3E%5Babc%5D%2B%29def%2Fi with named groups support