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| Related articles |
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| [3 earlier articles] |
| Re: additional regular expression operators haberg_20080406@math.su.se (Hans Aberg) (2009-03-30) |
| Re: additional regular expression operators torbenm@pc-003.diku.dk (2009-03-31) |
| Re: additional regular expression operators rpboland@gmail.com (Ralph Boland) (2009-03-31) |
| Re: additional regular expression operators torbenm@pc-003.diku.dk (2009-04-14) |
| Re: additional regular expression operators zayenz@gmail.com (MZL) (2009-04-15) |
| Re: additional regular expression operators anton@mips.complang.tuwien.ac.at (2009-04-16) |
| Re: additional regular expression operators gah@ugcs.caltech.edu (glen herrmannsfeldt) (2009-04-16) |
| Re: additional regular expression operators torbenm@pc-003.diku.dk (2009-04-17) |
| Re: additional regular expression operators mailbox@dmitry-kazakov.de (Dmitry A. Kazakov) (2009-04-17) |
| From: | glen herrmannsfeldt <gah@ugcs.caltech.edu> |
| Newsgroups: | comp.compilers |
| Date: | Thu, 16 Apr 2009 17:57:15 +0000 (UTC) |
| Organization: | California Institute of Technology, Pasadena |
| References: | 09-03-111 09-03-123 09-04-001 09-04-024 |
| Keywords: | lex |
| Posted-Date: | 17 Apr 2009 06:12:03 EDT |
Torben ?gidius Mogensen <torbenm@pc-003.diku.dk> wrote:
> Ralph Boland <rpboland@gmail.com> writes:
>>> > R% : equivalent to the string (R~)R
Someone else wrote:
>>> I can see the usefulness of the first two, but not really
>>> the third. Do you have an example?
(snip)
Sometimes you want to find the shortest match. (I believe the GNU
regexp has an operator for it, but I don't remember what it is.)
^.*XYZ
will normally match up to the last XYZ on the input record, but
sometimes you want the first one. I do agree that there should be a
convenient operator for that.
-- glen
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