[Mono-bugs] [Bug 467369] New: Regex bug with groups

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=467369


           Summary: Regex bug with groups
    Classification: Mono
           Product: Mono: Class Libraries
           Version: SVN
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: CORLIB
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: jbevain at novell.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


Running the following snippet:

<<<
using System;
using System.Text.RegularExpressions;

class Test {

    static void Main ()
    {
        var regex = new
Regex("(?:(?<w>\\d+)[.](?<adp>\\d+))|(?:(?<w>\\d+)\\s+(?<n>\\d+)/(?<d>\\d+))|(?:(?<n>\\d+)/(?<d>\\d+))|(?<w>\\d+)");
        string text = "2";

        var m = regex.Matches (text);

        foreach (Match match in m) {
            Console.WriteLine ("w: {0}, adp: {1}", match.Groups ["w"].Value,
match.Groups ["adp"].Value);
            Console.WriteLine ("n: {0}, d: {1}", match.Groups ["n"].Value,
match.Groups ["d"].Value);
        }
    }
}
<<<

net prints:

w: 2, adp:
n: , d:

Mono prints:

C:\Tmp>test
w: 2, adp:
n: 2, d:

So something is different with the `n' group.

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