Re: is expr's \? regex metachar working?

[Andreas Schwab]

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.

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