On Tue, Jun 18, 2019 at 07:08:06AM -0400, Mark H Weaver wrote: > Hi, > > Abdulrahman Semrie <hsami...@gmail.com> writes: > > > I am using the pattern [\\[\\]a-zA-Z]+ to match a string with left or > > right bracket in it [...]
> It turns out that there are several flavors of regular expressions in > common use, with different features and syntax. The link you provided > is using PCRE (PHP) regular expressions (see the "flavor" pane on the > left), and there are three other supported flavors on that web site. > > Guile's (ice-9 regex) module provides a simpler flavor of regexps known > as "POSIX extended regular expressions" [...] D'oh! I forgot about Perl compatible regexps. In those, you /can/ escape things with a backslash whithin [...]. This would have explained Abdulrhaman's confusion better. Thanks, Mark -- t
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