http://d.puremagic.com/issues/show_bug.cgi?id=10801

           Summary: std.regex: support for lookbehind in ctRegex
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody@puremagic.com
        ReportedBy: dmitry.olsh@gmail.com


--- Comment #0 from Dmitry Olshansky <dmitry.olsh@gmail.com> 2013-08-11 13:57:30 PDT ---
The last missing feature of ctRegex compared to regex.

For example the following test should pass.

import std.algorithm, std.regex;

void main()
{
    auto cr = ctRegex!(`(?<=(ab))\d`);
    auto m = match("12ba3ab4", cr);
    assert(m);
    assert(m.hit == "4");
}

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Andrei Alexandrescu <andrei@erdani.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |andrei@erdani.com
         AssignedTo|nobody@puremagic.com        |dmitry.olsh@gmail.com
           Severity|normal                      |blocker


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yebblies <yebblies@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |yebblies@gmail.com


--- Comment #1 from yebblies <yebblies@gmail.com> 2013-08-29 22:46:02 EST ---
Andrei, it would be helpful if you could please comment on why these seemingly normal bugs are blockers.

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--- Comment #2 from Andrei Alexandrescu <andrei@erdani.com> 2013-08-29 08:22:24 PDT ---
@yebblies at Facebook are experimenting with D regex performance on a few workloads.

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Dmitry Olshansky <dmitry.olsh@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


--- Comment #3 from Dmitry Olshansky <dmitry.olsh@gmail.com> 2013-08-29 08:39:02 PDT ---
Fixed by:

https://github.com/D-Programming-Language/phobos/commit/c37a5d865a636137d037b2df3d172f4058798df3

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--- Comment #4 from yebblies <yebblies@gmail.com> 2013-08-30 18:13:02 EST ---
(In reply to comment #2)
> @yebblies at Facebook are experimenting with D regex performance on a few workloads.

Interesting.  You could also add the 'industry' keyword to these issues to raise their profile.

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