[Mono-bugs] [Bug 476410] New: Regex does not consider range subtraction (foo-[\xMM-\xNN])

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https://bugzilla.novell.com/show_bug.cgi?id=476410


           Summary: Regex does not consider range subtraction
                    (foo-[\xMM-\xNN])
    Classification: Mono
           Product: Mono: Class Libraries
           Version: unspecified
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: System
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: atsushi at ximian.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.6)
Gecko/2009011913 Firefox/3.0.6 (.NET CLR 3.5.30729)

In the example repro, Regex.IsMatch() shows unexpected mismatch.

In general, pattern exclusion works (such as commented line above), but when it
is specified by character range, it doesn't.

Reproducible: Always

Steps to Reproduce:
using System;
using System.Text.RegularExpressions;

public class Test
{
        public static void Main ()
        {
                //string pattern = @"([\p{IsBasicLatin}-\x80])+";
                string pattern = @"([\p{IsBasicLatin}-[\x80-\xFF]])+";
                string target = "application";
                Console.WriteLine (Regex.IsMatch (target, pattern));
        }
}
Actual Results:  
False

Expected Results:  
True

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