=head1 NAME
PPIx::Regexp::Token::CharClass::Simple - This class represents a simple character class
=head1 SYNOPSIS
use PPIx::Regexp::Dumper;
PPIx::Regexp::Dumper->new( 'qr{\w}smx' )
->print();
=head1 INHERITANCE
C<PPIx::Regexp::Token::CharClass::Simple> is a
L<PPIx::Regexp::Token::CharClass|PPIx::Regexp::Token::CharClass>.
C<PPIx::Regexp::Token::CharClass::Simple> has no descendants.
=head1 DESCRIPTION
This class represents one of the simple character classes that can occur
anywhere in a regular expression. This includes not only the truly
simple things like \w, but also Unicode properties.
=head1 METHODS
This class provides no public methods beyond those provided by its
superclass.
=cut
package PPIx::Regexp::Token::CharClass::Simple;
use strict;
use warnings;
use base qw{ PPIx::Regexp::Token::CharClass };
use PPIx::Regexp::Constant qw{
COOKIE_CLASS MINIMUM_PERL TOKEN_LITERAL TOKEN_UNKNOWN
};
our $VERSION = '0.039';
##=head2 is_case_sensitive
##
##This override of the superclass method returns true for Unicode
##properties that specify case, and false (but defined) for all
##other character classes.
##
##The classes that specify case are documented in
##L<perluniprops|/perluniprops>.
##
##B<Known bug:> This method returns false (but defined) for user-defined
##Unicode properties. It should return C<undef>. This bug B<may> be fixed
##if I find a way to identify all system-defined Unicode properties.
##
##=cut
##
##sub is_case_sensitive {
## my ( $self ) = @_;
## exists $self->{is_case_sensitive}
## and return $self->{is_case_sensitive};
## return ( $self->{is_case_sensitive} = $self->_is_case_sensitive() );
##}
{
my %case_sensitive = map { $_ => 1 } qw{
generalcategory=lowercaseletter generalcategory=ll
gc=lowercaseletter gc=ll
generalcategory=titlecaseletter generalcategory=lt
gc=titlecaseletter gc=lt
generalcategory=uppercaseletter generalcategory=lu
gc=uppercaseletter gc=lu
lowercaseletter lowercase lower ll
titlecaseletter titlecase title lt
uppercaseletter uppercase upper lu
lowercase=y lower=y lowercase=n lower=n
titlecase=y title=y titlecase=n title=n
uppercase=y upper=y uppercase=n upper=n
};
sub _is_case_sensitive {
my ( $self ) = @_;
my $content = $self->content();
$content =~ m/ \A \\ p [{] ( .* ) [}] /smxi
or return 0;
$content = lc $1;
$content =~ s/ \A ^ //smx;
$content =~ s/ [\s_-] //smxg;
$content =~ s/ \A is //smx;
$content =~ s/ : /=/smxg;
$content =~ s/ = (?: yes | t | true ) \b /=y/smxg;
$content =~ s/ = (?: no | f | false ) \b /=n/smxg;
return $case_sensitive{$content} || 0;
}
}
{
my %introduced = (
'\h' => '5.009005', # Before this, parsed as 'h'
'\v' => '5.009005', # Before this, parsed as 'v'
'\H' => '5.009005', # Before this, parsed as 'H'
'\N' => '5.011', # Before this, an error.
'\V' => '5.009005', # Before this, parsed as 'V'
'\R' => '5.009005',
'\C' => '5.006',
'\X' => '5.006',
);
sub perl_version_introduced {
my ( $self ) = @_;
my $content = $self->content();
if ( defined( my $minver = $introduced{$content} ) ) {
return $minver;
}
if ( $content =~ m/ \A \\ [Pp] /smxg ) {
# I must have read perl5113delta and thought this
# represented the change they were talking about, but I sure
# don't see it now. So, until things become clearer ...
# $content =~ m/ \G .*? [\s=-] /smxgc
# and return '5.011003';
return '5.006001';
}
return MINIMUM_PERL;
}
}
sub __PPIX_TOKENIZER__regexp {
my ( $class, $tokenizer, $character ) = @_;
my $in_class = $tokenizer->cookie( COOKIE_CLASS );
if ( $character eq '.' ) {
$in_class
and return $tokenizer->make_token( 1, TOKEN_LITERAL );
return 1;
}
if ( my $accept = $tokenizer->find_regexp(
qr{ \A \\ (?:
[wWsSdDvVhHXRNC] |
[Pp] \{ \s* \^? [\w:=\s-]+ \}
) }smx
) ) {
if ( $in_class ) {
my $match = $tokenizer->match();
# As of Perl 5.11.5, [\N] is a fatal error.
'\\N' eq $match
and return $tokenizer->make_token(
$accept, TOKEN_UNKNOWN, {
error => '\\N invalid inside character class',
},
);
# \R is not recognized inside a character class. It
# eventually ends up as a literal.
'\\R' eq $match and return;
}
return $accept;
}
return;
}
1;
__END__
=head1 SUPPORT
Support is by the author. Please file bug reports at
L<http://rt.cpan.org>, or in electronic mail to the author.
=head1 AUTHOR
Thomas R. Wyant, III F<wyant at cpan dot org>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2009-2015 by Thomas R. Wyant, III
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl 5.10.0. For more details, see the full text
of the licenses in the directory LICENSES.
This program is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of
merchantability or fitness for a particular purpose.
=cut
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