Regular expression challenge

regex-challenge.js

Does anyone have a regular expression that would pull out all of the arguments as groups?

Example inputs (1 per line):

"arg one", "arg two", "arg three"
"arg one", arg.two, arg.three
"arg one", arg.two, "arg.three"
"arg , one", arg.two, "arg.three"
"class=\"arg\" one", arg.two, "arg.three"
"class=\"arg\" one", "arg , two", "arg.three"
"class=\"arg\" one", "arg \" \" two", "arg.three"
"arguments: A, B, \"C\", D", "arg \" \" two", "arg.three"

The groups for the last input would be an array of length 3.

This uses backtracking and hence generates some extra groups. But works (at least on your inputs).

import re

inputs = ['"arg one", "arg two", "arg three"',
          '"arg one", arg.two, arg.three',
          '"arg one", arg.two, "arg.three"',
          '"arg , one", arg.two, "arg.three"',
          '"class=\\"arg\\" one", arg.two, "arg.three"',
          '"class=\\"arg\\" one", "arg , two", "arg.three"',
          '"class=\\"arg\\" one", "arg \\" \\" two", "arg.three"',
          '"arguments: A, B, \\"C\\", D", "arg \\" \\" two", "arg.three"']


for input in inputs:
    match = re.match(r'("?)(.*?[^\\])\1, ("?)(.*?[^\\])\3, ("?)(.*?[^\\])\5$', input)
    print '%s : %s : %s' % (match.group(2), match.group(4), match.group(6))