On Wed, Feb 10, 2010 at 12:24:57PM +0100, Dag-Erling Sm??rgrav wrote: > Garrett Cooper <yanef...@gmail.com> writes: > > C-shell globs as some programming languages referring to it as, > > i.e. perl (which this is a subset of the globs concept) allow for > > expansion via `*' to be `anything'. Regexp style globs for what you're > > looking for would be either .* (greedy) or .+ (non-greedy), with it > > being most likely the latter case. > > Uh, not quite. > > Formally, a regular expression is a textual representation of a finite > state machine that describes a context-free grammar.
I dont think so.... regular expressions describe regular languages which are a strict subset of context free languages. the practical difference is that you cannot describe for example expressions with parenthesis with a regular expression while you can with a context free grammar... for more info see: http://en.wikipedia.org/wiki/Chomsky_hierarchy _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
