Re: posix-string-match does not distinguish "*" from "*?"

[Andreas Schwab]

Matt Swift <swift@alum.mit.edu> writes:

|> `posix-string-match' (and I presume the other `posix-*' searching
|> functions) do not seem to distinguish between the "*" and "*?"
|> operators.  No mention is made of this difference from `string-match'
|> in the Elisp manual, which describes the posix- functions as having
|> super-greedy repetition constructs and handling of "|", but a reader
|> would not guess that these functions differ with respect to the
|> explicitly non-greedy operators "*?", "+?"  and "??".  Since I do not
|> have access to the POSIX specs, someone else will have to discern
|> whether this is a dox bug or a bug in `posix-string-match'.

POSIX does not define any of these non-greedy operators:

  The behavior of multiple adjacent duplication symbols ('+', '*', '?',
  and intervals) produces undefined results.

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
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