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package Catmandu::Util::Regex;
use Catmandu::Sane;
our $VERSION = '1.2024';
use Exporter qw(import);
our @EXPORT_OK = qw(
escape_regex
as_regex
substituter
);
our %EXPORT_TAGS = (all => \@EXPORT_OK,);
sub _escape_regex {
my ($str) = @_;
$str =~ s/\//\\\//g;
$str =~ s/\\$/\\\\/; # pattern can't end with an escape
$str;
}
sub as_regex {
my ($str) = @_;
$str = _escape_regex($str);
qr/$str/;
}
sub substituter {
my ($search, $replace) = @_;
$search = as_regex($search);
$replace = _escape_regex($replace);
eval
qq|sub {my \$str = \$_[0]; utf8::upgrade(\$str); \$str =~ s/$search/$replace/g; \$str}|;
}
1;
__END__
=pod
=head1 NAME
Catmandu::Util::Regex - Regex related utility functions
=head1 FUNCTIONS
=over 4
=item as_regex($str)
Escapes and quotes the given string as a regex.
=item substituter($search, $replace)
Builds a function that performs a regex substitution.
my $ltrimmer = substituter('^[\h\v]+', '');
$ltrimmer->(" eek! ");
# => "eek! "
=back
=cut
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