buggrep - Bugs: bug #17454, Man page should describe...


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bug #17454: Man page should describe parentheses

Submitted by:  Tim Waugh <twaugh>
Submitted on:  Thu 17 Aug 2006 10:25:06 AM UTC  
Category:  None Severity:  3 - Normal
Item Group:  None Status:  Fixed
Privacy:  Public Assigned to:  None
Open/Closed:  Closed

Tue 22 Dec 2009 09:16:21 AM UTC, comment #1: 

       Repetition takes precedence over concatenation,  which  in  turn  takes
       precedence  over  alternation.   A  whole expression may be enclosed in
       parentheses  to  override   these   precedence   rules   and   form   a

   Back References and Subexpressions
       The back-reference \n, where n is a single digit, matches the substring
       previously matched  by  the  nth  parenthesized  subexpression  of  the
       regular expression.

Thank you for the bug report. This bug has been fixed in CVS and
in grep-2.5.4. You may download the latest release from:


Paolo Bonzini <bonzini>
Thu 17 Aug 2006 10:25:06 AM UTC, original submission:  

Original bug report:

Grep's man page only reference to parentheses is that they lose their special meaning in basic regular expressions.  There needs to be some descriptions about what parentheses do and how to use them.

Tim Waugh <twaugh>


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Depends on the following items: None found

Items that depend on this one: None found


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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2009-12-22 bonzini StatusNone => Fixed
        Open/ClosedOpen => Closed

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