[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: is expr's \? regex metachar working?
From: |
Andreas Schwab |
Subject: |
Re: is expr's \? regex metachar working? |
Date: |
23 Aug 2001 16:47:31 +0200 |
User-agent: |
Gnus/5.090003 (Oort Gnus v0.03) Emacs/21.0.105 |
Clark Morgan <address@hidden> writes:
|> On Thu, Aug 23, 2001 at 04:04:53PM +0200, Andreas Schwab wrote:
|> > "Clark O. Morgan" <cmorganOaracnet.com> writes:
|> >
|> > |> $ ./expr "abcdef" : '.*u\?'
|> > |> 6
|> > |> $ ./expr "abcdef" : '.*b\?'
|> > |> 6 <--- this looks wrong
|> >
|> > No, this is correct. The '.*' regexp matches the maximum possible length,
|> > which is all 6 characters. Since b is optional, it does not cause a match
|> > failure.
|>
|> In that case, \? is worthless (i.e., can't tell the difference
|> between a match or nonmatch).
???? The regexp _is_ matching, since expr prints > 0.
Andreas.
--
Andreas Schwab "And now for something
SuSE Labs completely different."
address@hidden
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
- is expr's \? regex metachar working?, Clark O. Morgan, 2001/08/23
- Re: is expr's \? regex metachar working?, Andreas Schwab, 2001/08/23
- Re: is expr's \? regex metachar working?, Clark Morgan, 2001/08/23
- Re: is expr's \? regex metachar working?,
Andreas Schwab <=
- Re: is expr's \? regex metachar working?, Clark Morgan, 2001/08/23
- Re: is expr's \? regex metachar working?, Andreas Schwab, 2001/08/23
- Re: is expr's \? regex metachar working?, Clark Morgan, 2001/08/23
- Re: is expr's \? regex metachar working?, Andreas Schwab, 2001/08/23
- Re: is expr's \? regex metachar working?, Clark Morgan, 2001/08/23
- Re: is expr's \? regex metachar working?, Paul Jarc, 2001/08/23
Re: is expr's \? regex metachar working?, Clark O. Morgan, 2001/08/23