Shellish(3) User Contributed Perl Documentation Shellish(3)NAMERegexp::Shellish - Shell-like regular expressions
SYNOPSIS
use Regexp::Shellish qw( :all ) ;
$re = compile_shellish( 'a/c*d' ) ;
## This next one's like 'a*d' except that it'll
## match 'a/d'.
$re = compile_shellish( 'a**d' ) ;
## And here '**' won't match 'a/d', but behaves
## like 'a*d', except for the possibility of high
## cpu time consumption.
$re = compile_shellish( 'a**d', { star_star => 0 } ) ;
## The next two result in identical $re1 and $re2.
## The second is a noop so that Regexp references can
## be easily accomodated.
$re1 = compile_shellish( 'a{b,c}d' ) ;
$re2 = compile_shellish( qr/\A(?:a(?:b|c)d)\Z/ ) ;
@matches = shellish_glob( $re, @possibilities ) ;
DESCRIPTION
Provides shell-like regular expressions. The wildcards provided are
"?", "*" and "**", where "**" is like "*" but matches "/". See
"compile_shellish" for details.
Case sensitivity and constructs like <**>, "(a*b)", and "{a,b,c}" can
be disabled.
compile_shellish
Compiles a string containing a 'shellish' regular expression,
returning a Regexp reference. Regexp references passed in are
passed through unmolested.
Here are the transformation rules from shellish expression terms to
perl regular expression terms:
Shellish Perl RE
======== =======
* [^/]*
? .
** .* ## unless { star_star => 0 }
... .* ## unless { dot_dot_dot => 0 }
( ( ## unless { parens => 0 }
) ) ## unless { parens => 0 }
{a,b,c} (?:a|b|c) ## unless { braces => 0 }
\a a ## These are de-escaped and
\* \* ## passed to quotemeta()
The wildcards treat newlines as normal characters.
Parens group in to $1..$n, since they are passed through unmolested
(unless option parens => 0 is passed). This is useless when using
glob_shellish(), though.
The final parameter can be a hash reference containing options:
compile_shellish(
'**',
{
anchors => 0, ## Doesn't put ^ and $ around the
## resulting regexp
case_sensitive => 0, ## Make case insensitive
dot_dot_dot => 0, ## '...' is now just three '.' chars
star_star => 0, ## '**' is now two '*' wildcards
parens => 0, ## '(', ')' are now regular chars
braces => 0, ## '{', '}' are now regular chars
}
) ;
No option affects Regexps passed through.
shellish_glob
Pass a regular expression and a list of possible values, get back a
list of matching values.
my @matches = shellish_glob( '*/*', @possibilities ) ;
my @matches = shellish_glob( '*/*', @possibilities, \%options ) ;
AUTHOR
Barrie Slaymaker <barries@slaysys.com>
perl v5.14.0 2002-01-24 Shellish(3)
