use strict;
use warnings;
-use Text::Balanced qw/extract_bracketed/;
+use Carp qw<croak>;
+use Scalar::Util qw<blessed>;
+use Text::Balanced qw<extract_bracketed>;
=head1 NAME
-Regexp::Wildcards - Converts wildcards expressions to Perl regular expressions.
+Regexp::Wildcards - Converts wildcard expressions to Perl regular expressions.
=head1 VERSION
-Version 0.02
+Version 1.04
=cut
-our $VERSION = '0.02';
+use vars qw<$VERSION>;
+BEGIN {
+ $VERSION = '1.04';
+}
=head1 SYNOPSIS
- use Regexp::Wildcards qw/wc2re/;
+ use Regexp::Wildcards;
+
+ my $rw = Regexp::Wildcards->new(type => 'unix');
my $re;
- $re = wc2re 'a{b.,c}*' => 'unix'; # Do it Unix style.
- $re = wc2re 'a.,b*' => 'win32'; # Do it Windows style.
- $re = wc2re '*{x,y}.' => 'jokers'; # Process the jokers & escape the rest.
+ $re = $rw->convert('a{b?,c}*'); # Do it Unix shell style.
+ $re = $rw->convert('a?,b*', 'win32'); # Do it Windows shell style.
+ $re = $rw->convert('*{x,y}?', 'jokers'); # Process the jokers and escape the rest.
+ $re = $rw->convert('%a_c%', 'sql'); # Turn SQL wildcards into regexps.
+
+ $rw = Regexp::Wildcards->new(
+ do => [ qw<jokers brackets> ], # Do jokers and brackets.
+ capture => [ qw<any greedy> ], # Capture *'s greedily.
+ );
+
+ $rw->do(add => 'groups'); # Don't escape groups.
+ $rw->capture(rem => [ qw<greedy> ]); # Actually we want non-greedy matches.
+ $re = $rw->convert('*a{,(b)?}?c*'); # '(.*?)a(?:|(b).).c(.*?)'
+ $rw->capture(); # No more captures.
=head1 DESCRIPTION
-In many situations, users may want to specify patterns to match but don't need the full power of regexps. Wildcards make one of those sets of simplified rules. This module converts wildcards expressions to Perl regular expressions, so that you can use them for matching. It handles the C<*> and C<?> jokers, as well as Unix bracketed alternatives C<{,}>, and uses the backspace (C<\>) as an escape character. Wrappers are provided to mimic the behaviour of Windows and Unix shells.
+In many situations, users may want to specify patterns to match but don't need the full power of regexps.
+Wildcards make one of those sets of simplified rules.
+This module converts wildcard expressions to Perl regular expressions, so that you can use them for matching.
-=head1 EXPORT
+It handles the C<*> and C<?> jokers, as well as Unix bracketed alternatives C<{,}>, but also C<%> and C<_> SQL wildcards.
+If required, it can also keep original C<(...)> groups or C<^> and C<$> anchors.
+Backspace (C<\>) is used as an escape character.
-Four functions are exported only on request : C<wc2re>, C<wc2re_unix>, C<wc2re_win32> and C<wc2re_jokers>.
+Typesets that mimic the behaviour of Windows and Unix shells are also provided.
+
+=head1 METHODS
=cut
-use base qw/Exporter/;
+sub _check_self {
+ croak 'First argument isn\'t a valid ' . __PACKAGE__ . ' object'
+ unless blessed $_[0] and $_[0]->isa(__PACKAGE__);
+}
my %types = (
- 'jokers' => \&wc2re_jokers,
- 'unix' => \&wc2re_unix,
- 'win32' => \&wc2re_win32
+ jokers => [ qw<jokers> ],
+ sql => [ qw<sql> ],
+ commas => [ qw<commas> ],
+ brackets => [ qw<brackets> ],
+ unix => [ qw<jokers brackets> ],
+ win32 => [ qw<jokers commas> ],
+);
+$types{$_} = $types{win32} for qw<dos os2 MSWin32 cygwin>;
+$types{$_} = $types{unix} for qw<linux
+ darwin machten next
+ aix irix hpux dgux dynixptx
+ bsdos freebsd openbsd
+ svr4 solaris sunos dec_osf
+ sco_sv unicos unicosmk>;
+
+my %escapes = (
+ jokers => '?*',
+ sql => '_%',
+ commas => ',',
+ brackets => '{},',
+ groups => '()',
+ anchors => '^$',
+);
+
+my %captures = (
+ single => sub { $_[1] ? '(.)' : '.' },
+ any => sub { $_[1] ? ($_[0]->{greedy} ? '(.*)'
+ : '(.*?)')
+ : '.*' },
+ brackets => sub { $_[1] ? '(' : '(?:'; },
+ greedy => undef,
);
-our @EXPORT = ();
-our @EXPORT_OK = ('wc2re', map { 'wc2re_' . $_ } keys %types);
-our @EXPORT_FAIL = qw/extract do_jokers do_commas do_brackets do_bracketed/;
-our %EXPORT_TAGS = ( all => [ @EXPORT_OK ] );
+sub _validate {
+ my $self = shift;
+ _check_self $self;
+ my $valid = shift;
+ my $old = shift;
+ $old = { } unless defined $old;
+
+ my %opts;
+ if (@_ <= 1) {
+ $opts{set} = defined $_[0] ? $_[0] : { };
+ } elsif (@_ % 2) {
+ croak 'Arguments must be passed as an unique scalar or as key => value pairs';
+ } else {
+ %opts = @_;
+ }
-=head1 FUNCTIONS
+ my %checked;
+ for (qw<set add rem>) {
+ my $opt = $opts{$_};
+ next unless defined $opt;
+
+ my $cb = {
+ '' => sub { +{ ($_[0] => 1) x (exists $valid->{$_[0]}) } },
+ 'ARRAY' => sub { +{ map { ($_ => 1) x (exists $valid->{$_}) } @{$_[0]} } },
+ 'HASH' => sub { +{ map { ($_ => $_[0]->{$_}) x (exists $valid->{$_}) }
+ keys %{$_[0]} } }
+ }->{ ref $opt };
+ croak 'Wrong option set' unless $cb;
+ $checked{$_} = $cb->($opt);
+ }
-=head2 C<wc2re_unix>
+ my $config = (exists $checked{set}) ? $checked{set} : $old;
+ $config->{$_} = $checked{add}->{$_} for grep $checked{add}->{$_},
+ keys %{$checked{add} || {}};
+ delete $config->{$_} for grep $checked{rem}->{$_},
+ keys %{$checked{rem} || {}};
-This function takes as its only argument the wildcard string to process, and returns the corresponding regular expression according to standard Unix wildcard rules. It successively escapes all unprotected regexp special characters that doesn't hold any meaning for wildcards, turns jokers into their regexp equivalents, and changes bracketed blocks into C<(?:|)> alternations. If brackets are unbalanced, it will try to substitute as many of them as possible, and then escape the remaining C<{> and C<}>. Commas outside of any bracket-delimited block will also be escaped.
+ $config;
+}
- # This is a valid brackets expression which is correctly handled.
- print 'ok' if wc2re_unix('{a{b,c}d,e}') eq '(?:a(?:b|c)d|e)';
+sub _do {
+ my $self = shift;
-Unbalanced bracket expressions can always be rescued, but it may change completely its meaning. For example :
+ my $config;
+ $config->{do} = $self->_validate(\%escapes, $self->{do}, @_);
+ $config->{escape} = '';
+ $config->{escape} .= $escapes{$_} for keys %{$config->{do}};
+ $config->{escape} = quotemeta $config->{escape};
- # The first comma is replaced, and the remaining brackets and comma are
- # escaped.
- print 'ok' if wc2re_unix('{a\\{b,c}d,e}') eq '(?:a\\{b|c)d\\,e\\}';
+ $config;
+}
- # All the brackets and commas are escaped.
- print 'ok' if wc2re_unix('{a{b,c\\}d,e}') eq '\\{a\\{b\\,c\\}d\\,e\\}';
+sub do {
+ my $self = shift;
+ _check_self $self;
-=cut
+ my $config = $self->_do(@_);
+ $self->{$_} = $config->{$_} for keys %$config;
-sub wc2re_unix {
- my ($re) = @_;
- return unless defined $re;
- $re =~ s/(?<!\\)((?:\\\\)*[^\w\s?*\\\{\},])/\\$1/g;
- return do_bracketed(do_jokers($re));
+ $self;
}
-=head2 C<wc2re_win32>
+sub _capture {
+ my $self = shift;
-Similar to the precedent, but for Windows wildcards. Bracketed blocks are no longer handled (which means that brackets will be escaped), but you can provide a comma-separated list of items.
+ my $config;
+ $config->{capture} = $self->_validate(\%captures, $self->{capture}, @_);
+ $config->{greedy} = delete $config->{capture}->{greedy};
+ for (keys %captures) {
+ $config->{'c_' . $_} = $captures{$_}->($config, $config->{capture}->{$_})
+ if $captures{$_}; # Skip 'greedy'
+ }
- # All the brackets are escaped, and commas are seen as list delimiters.
- print 'ok' if wc2re_win32('{a{b,c}d,e}') eq '(?:\\{a\\{b|c\\}d|e\\})';
+ $config;
+}
-=cut
+sub capture {
+ my $self = shift;
+ _check_self $self;
-sub wc2re_win32 {
- my ($wc) = @_;
- return unless defined $wc;
- $wc =~ s/(?<!\\)((?:\\\\)*[^\w\s?*\\,])/\\$1/g;
- my $re = do_jokers($wc);
- if ($re =~ /(?<!\\)(?:\\\\)*,/) { # win32 allows comma-separated lists
- $re = '(?:' . do_commas($re) . ')';
- }
- return $re;
+ my $config = $self->_capture(@_);
+ $self->{$_} = $config->{$_} for keys %$config;
+
+ $self;
}
-=head2 C<wc2re_jokers>
+sub _type {
+ my ($self, $type) = @_;
+ $type = 'unix' unless defined $type;
+ croak 'Wrong type' unless exists $types{$type};
-This one only handles the C<?> and C<*> jokers. All other unquoted regexp metacharacters will be escaped.
+ my $config = $self->_do($types{$type});
+ $config->{type} = $type;
- # Everything is escaped.
- print 'ok' if wc2re_jokers('{a{b,c}d,e}') eq '\\{a\\{b\\,c\\}d\\,e\\}';
+ $config;
+}
-=cut
+sub type {
+ my $self = shift;
+ _check_self $self;
-sub wc2re_jokers {
- my ($wc) = @_;
- $wc =~ s/(?<!\\)((?:\\\\)*[^\w\s?*\\])/\\$1/g;
- return do_jokers($wc);
+ my $config = $self->_type(@_);
+ $self->{$_} = $config->{$_} for keys %$config;
+
+ $self;
}
-=head2 C<wc2re>
+sub new {
+ my $class = shift;
+ $class = blessed($class) || $class || __PACKAGE__;
+
+ croak 'Optional arguments must be passed as key => value pairs' if @_ % 2;
+ my %args = @_;
+
+ my $self = bless { }, $class;
+
+ if (defined $args{do}) {
+ $self->do($args{do});
+ } else {
+ $self->type($args{type});
+ }
+
+ $self->capture($args{capture});
+}
+
+=head2 C<new>
+
+ my $rw = Regexp::Wildcards->new(do => $what, capture => $capture);
+ my $rw = Regexp::Wildcards->new(type => $type, capture => $capture);
+
+Constructs a new L<Regexp::Wildcard> object.
+
+C<do> lists all features that should be enabled when converting wildcards to regexps.
+Refer to L</do> for details on what can be passed in C<$what>.
+
+The C<type> specifies a predefined set of C<do> features to use.
+See L</type> for details on which types are valid.
+The C<do> option overrides C<type>.
+
+C<capture> lists which atoms should be capturing.
+Refer to L</capture> for more details.
+
+=head2 C<do>
+
+ $rw->do($what);
+ $rw->do(set => $c1);
+ $rw->do(add => $c2);
+ $rw->do(rem => $c3);
+
+Specifies the list of metacharacters to convert or to prevent for escaping.
+They fit into six classes :
+
+=over 4
+
+=item *
+
+C<'jokers'>
+
+Converts C<?> to C<.> and C<*> to C<.*>.
+
+ 'a**\\*b??\\?c' ==> 'a.*\\*b..\\?c'
+
+=item *
+
+C<'sql'>
+
+Converts C<_> to C<.> and C<%> to C<.*>.
+
+ 'a%%\\%b__\\_c' ==> 'a.*\\%b..\\_c'
+
+=item *
+
+C<'commas'>
+
+Converts all C<,> to C<|> and puts the complete resulting regular expression inside C<(?: ... )>.
+
+ 'a,b{c,d},e' ==> '(?:a|b\\{c|d\\}|e)'
+
+=item *
+
+C<'brackets'>
+
+Converts all matching C<{ ... , ... }> brackets to C<(?: ... | ... )> alternations.
+If some brackets are unbalanced, it tries to substitute as many of them as possible, and then escape the remaining unmatched C<{> and C<}>.
+Commas outside of any bracket-delimited block are also escaped.
+
+ 'a,b{c,d},e' ==> 'a\\,b(?:c|d)\\,e'
+ '{a\\{b,c}d,e}' ==> '(?:a\\{b|c)d\\,e\\}'
+ '{a{b,c\\}d,e}' ==> '\\{a\\{b\\,c\\}d\\,e\\}'
+
+=item *
+
+C<'groups'>
+
+Keeps the parenthesis C<( ... )> of the original string without escaping them.
+Currently, no check is done to ensure that the parenthesis are matching.
+
+ 'a(b(c))d\\(\\)' ==> (no change)
+
+=item *
+
+C<'anchors'>
+
+Prevents the I<beginning-of-line> C<^> and I<end-of-line> C<$> anchors to be escaped.
+Since C<[...]> character class are currently escaped, a C<^> will always be interpreted as I<beginning-of-line>.
+
+ 'a^b$c' ==> (no change)
+
+=back
+
+Each C<$c> can be any of :
+
+=over 4
+
+=item *
+
+A hash reference, with wanted metacharacter group names (described above) as keys and booleans as values ;
+
+=item *
+
+An array reference containing the list of wanted metacharacter classes ;
+
+=item *
+
+A plain scalar, when only one group is required.
+
+=back
+
+When C<set> is present, the classes given as its value replace the current object options.
+Then the C<add> classes are added, and the C<rem> classes removed.
+
+Passing a sole scalar C<$what> is equivalent as passing C<< set => $what >>.
+No argument means C<< set => [ ] >>.
+
+ $rw->do(set => 'jokers'); # Only translate jokers.
+ $rw->do('jokers'); # Same.
+ $rw->do(add => [ qw<sql commas> ]); # Translate also SQL and commas.
+ $rw->do(rem => 'jokers'); # Specifying both 'sql' and 'jokers' is useless.
+ $rw->do(); # Translate nothing.
+
+The C<do> method returns the L<Regexp::Wildcards> object.
-A generic function that wraps around all the different rules. The first argument is the wildcard expression, and the second one is the type of rules to apply, currently either C<unix>, C<win32> or C<jokers>. If the type is undefined, it defaults to C<unix>.
+=head2 C<type>
+
+ $rw->type($type);
+
+Notifies to convert the metacharacters that corresponds to the predefined type C<$type>.
+C<$type> can be any of :
+
+=over 4
+
+=item *
+
+C<'jokers'>, C<'sql'>, C<'commas'>, C<'brackets'>
+
+Singleton types that enable the corresponding C<do> classes.
+
+=item *
+
+C<'unix'>
+
+Covers typical Unix shell globbing features (effectively C<'jokers'> and C<'brackets'>).
+
+=item *
+
+C<$^O> values for common Unix systems
+
+Wrap to C<'unix'> (see L<perlport> for the list).
+
+=item *
+
+C<undef>
+
+Defaults to C<'unix'>.
+
+=item *
+
+C<'win32'>
+
+Covers typical Windows shell globbing features (effectively C<'jokers'> and C<'commas'>).
+
+=item *
+
+C<'dos'>, C<'os2'>, C<'MSWin32'>, C<'cygwin'>
+
+Wrap to C<'win32'>.
+
+=back
+
+In particular, you can usually pass C<$^O> as the C<$type> and get the corresponding shell behaviour.
+
+ $rw->type('win32'); # Set type to win32.
+ $rw->type($^O); # Set type to unix on Unices and win32 on Windows
+ $rw->type(); # Set type to unix.
+
+The C<type> method returns the L<Regexp::Wildcards> object.
+
+=head2 C<capture>
+
+ $rw->capture($captures);
+ $rw->capture(set => $c1);
+ $rw->capture(add => $c2);
+ $rw->capture(rem => $c3);
+
+Specifies the list of atoms to capture.
+This method works like L</do>, except that the classes are different :
+
+=over 4
+
+=item *
+
+C<'single'>
+
+Captures all unescaped I<"exactly one"> metacharacters, i.e. C<?> for wildcards or C<_> for SQL.
+
+ 'a???b\\??' ==> 'a(.)(.)(.)b\\?(.)'
+ 'a___b\\__' ==> 'a(.)(.)(.)b\\_(.)'
+
+=item *
+
+C<'any'>
+
+Captures all unescaped I<"any"> metacharacters, i.e. C<*> for wildcards or C<%> for SQL.
+
+ 'a***b\\**' ==> 'a(.*)b\\*(.*)'
+ 'a%%%b\\%%' ==> 'a(.*)b\\%(.*)'
+
+=item *
+
+C<'greedy'>
+
+When used in conjunction with C<'any'>, it makes the C<'any'> captures greedy (by default they are not).
+
+ 'a***b\\**' ==> 'a(.*?)b\\*(.*?)'
+ 'a%%%b\\%%' ==> 'a(.*?)b\\%(.*?)'
+
+=item *
+
+C<'brackets'>
+
+Capture matching C<{ ... , ... }> alternations.
+
+ 'a{b\\},\\{c}' ==> 'a(b\\}|\\{c)'
+
+=back
+
+ $rw->capture(set => 'single'); # Only capture "exactly one" metacharacters.
+ $rw->capture('single'); # Same.
+ $rw->capture(add => [ qw<any greedy> ]); # Also greedily capture "any" metacharacters.
+ $rw->capture(rem => 'greedy'); # No more greed please.
+ $rw->capture(); # Capture nothing.
+
+The C<capture> method returns the L<Regexp::Wildcards> object.
+
+=head2 C<convert>
+
+ my $rx = $rw->convert($wc);
+ my $rx = $rw->convert($wc, $type);
+
+Converts the wildcard expression C<$wc> into a regular expression according to the options stored into the L<Regexp::Wildcards> object, or to C<$type> if it's supplied.
+It successively escapes all unprotected regexp special characters that doesn't hold any meaning for wildcards, then replace C<'jokers'>, C<'sql'> and C<'commas'> or C<'brackets'> (depending on the L</do> or L</type> options), all of this by applying the C<'capture'> rules specified in the constructor or by L</capture>.
=cut
-sub wc2re {
- my ($wc, $type) = @_;
+sub convert {
+ my ($self, $wc, $type) = @_;
+ _check_self $self;
+
+ my $config = (defined $type) ? $self->_type($type) : $self;
return unless defined $wc;
- $type ||= 'unix';
- return $types{lc $type}($wc);
+
+ my $e = $config->{escape};
+ # Escape :
+ # - an even number of \ that doesn't protect a regexp/wildcard metachar
+ # - an odd number of \ that doesn't protect a wildcard metachar
+ $wc =~ s/
+ (?<!\\)(
+ (?:\\\\)*
+ (?:
+ [^\w\s\\$e]
+ |
+ \\
+ (?: [^\W$e] | \s | $ )
+ )
+ )
+ /\\$1/gx;
+
+ my $do = $config->{do};
+ $wc = $self->_jokers($wc) if $do->{jokers};
+ $wc = $self->_sql($wc) if $do->{sql};
+ if ($do->{brackets}) {
+ $wc = $self->_bracketed($wc);
+ } elsif ($do->{commas} and $wc =~ /(?<!\\)(?:\\\\)*,/) {
+ $wc = $self->{'c_brackets'} . $self->_commas($wc) . ')';
+ }
+
+ $wc
}
-=head1 DEPENDENCIES
+=head1 EXPORT
-L<Text::Balanced>, which is bundled with perl since version 5.7.3
+An object module shouldn't export any function, and so does this one.
-=head1 SEE ALSO
+=head1 DEPENDENCIES
+
+L<Carp> (core module since perl 5), L<Scalar::Util>, L<Text::Balanced> (since 5.7.3).
-Some modules provide incomplete alternatives as helper functions :
+=head1 CAVEATS
-L<Net::FTPServer> has a method for that. Only jokers are translated, and escaping won't preserve them.
+This module does not implement the strange behaviours of Windows shell that result from the special handling of the three last characters (for the file extension).
+For example, Windows XP shell matches C<*a> like C<.*a>, C<*a?> like C<.*a.?>, C<*a??> like C<.*a.{0,2}> and so on.
-L<File::Find::Match::Util> has a C<wildcar> function that compiles a matcher. Only handles C<*>.
+=head1 SEE ALSO
-L<Text::Buffer> has the C<convertWildcardToRegex> class method that handles jokers.
+L<Text::Glob>.
=head1 AUTHOR
-Vincent Pit, C<< <perl at profvince.com> >>
+Vincent Pit, C<< <perl at profvince.com> >>, L<http://www.profvince.com>.
+
+You can contact me by mail or on C<irc.perl.org> (vincent).
=head1 BUGS
-Please report any bugs or feature requests to
-C<bug-regexp-wildcards at rt.cpan.org>, or through the web interface at
-L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Regexp-Wildcards>.
-I will be notified, and then you'll automatically be notified of progress on
-your bug as I make changes.
+Please report any bugs or feature requests to C<bug-regexp-wildcards at rt.cpan.org>, or through the web interface at L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Regexp-Wildcards>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.
=head1 SUPPORT
perldoc Regexp::Wildcards
+Tests code coverage report is available at L<http://www.profvince.com/perl/cover/Regexp-Wildcards>.
+
=head1 COPYRIGHT & LICENSE
-Copyright 2007 Vincent Pit, all rights reserved.
+Copyright 2007-2009 Vincent Pit, all rights reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
=cut
-sub extract { extract_bracketed shift, '{', qr/.*?(?:(?<!\\)(?:\\\\)*)(?={)/; }
+sub _extract ($) { extract_bracketed $_[0], '{', qr/.*?(?<!\\)(?:\\\\)*(?={)/ }
+
+sub _jokers {
+ my $self = shift;
+ local $_ = $_[0];
-sub do_jokers {
- local $_ = shift;
- # escape an odd number of \ that doesn't protect a regexp/wildcard special char
- s/(?<!\\)((?:\\\\)*\\(?:[\w\s]|$))/\\$1/g;
# substitute ? preceded by an even number of \
- s/(?<!\\)((?:\\\\)*)\?/$1./g;
+ my $s = $self->{c_single};
+ s/(?<!\\)((?:\\\\)*)\?/$1$s/g;
# substitute * preceded by an even number of \
- s/(?<!\\)((?:\\\\)*)\*+/$1.*/g;
- return $_;
+ $s = $self->{c_any};
+ s/(?<!\\)((?:\\\\)*)\*+/$1$s/g;
+
+ $_
}
-sub do_commas {
- local $_ = shift;
+sub _sql {
+ my $self = shift;
+ local $_ = $_[0];
+
+ # substitute _ preceded by an even number of \
+ my $s = $self->{c_single};
+ s/(?<!\\)((?:\\\\)*)_/$1$s/g;
+ # substitute % preceded by an even number of \
+ $s = $self->{c_any};
+ s/(?<!\\)((?:\\\\)*)%+/$1$s/g;
+
+ $_
+}
+
+sub _commas {
+ local $_ = $_[1];
+
# substitute , preceded by an even number of \
s/(?<!\\)((?:\\\\)*),/$1|/g;
- return $_;
+
+ $_
}
-sub do_brackets {
- my $rest = shift;
+sub _brackets {
+ my ($self, $rest) = @_;
+
substr $rest, 0, 1, '';
chop $rest;
+
my ($re, $bracket, $prefix) = ('');
- while (($bracket, $rest, $prefix) = extract $rest and $bracket) {
- $re .= do_commas($prefix) . do_brackets($bracket);
+ while (do { ($bracket, $rest, $prefix) = _extract $rest; $bracket }) {
+ $re .= $self->_commas($prefix) . $self->_brackets($bracket);
}
- $re .= do_commas($rest);
- return '(?:' . $re . ')';
+ $re .= $self->_commas($rest);
+
+ $self->{c_brackets} . $re . ')';
}
-sub do_bracketed {
- my $rest = shift;
+sub _bracketed {
+ my ($self, $rest) = @_;
+
my ($re, $bracket, $prefix) = ('');
- while (($bracket, $rest, $prefix) = extract $rest and $bracket) {
- $re .= $prefix . do_brackets($bracket);
+ while (do { ($bracket, $rest, $prefix) = _extract $rest; $bracket }) {
+ $re .= $prefix . $self->_brackets($bracket);
}
$re .= $rest;
+
$re =~ s/(?<!\\)((?:\\\\)*[\{\},])/\\$1/g;
- return $re;
+
+ $re;
}
1; # End of Regexp::Wildcards
projects / perl / modules / Regexp-Wildcards.git / blobdiff