File Coverage

blib/lib/PPIx/Regexp/Token/Greediness.pm

Criterion	Covered	Total	%
statement	21	22	95.4
branch	4	4	100.0
condition	1	2	50.0
subroutine	8	9	88.8
pod	3	3	100.0
total	37	40	92.5

=head1 NAME

PPIx::Regexp::Token::Greediness - Represent a greediness qualifier.

=head1 SYNOPSIS

 use PPIx::Regexp::Dumper;
 PPIx::Regexp::Dumper->new( 'qr{foo*+}smx' )
     ->print();

=head1 INHERITANCE

C is a
L.

C has no descendants.

=head1 DESCRIPTION

This class represents a greediness qualifier for the preceding
quantifier.

=head1 METHODS

This class provides the following public methods. Methods not documented
here are private, and unsupported in the sense that the author reserves
the right to change or remove them without notice.

=cut

package PPIx::Regexp::Token::Greediness;

use strict;
use warnings;

use base qw{ PPIx::Regexp::Token };

use PPIx::Regexp::Constant qw{ MINIMUM_PERL @CARP_NOT };

our $VERSION = '0.088';

# Return true if the token can be quantified, and false otherwise
sub can_be_quantified { return };

{

    my %explanation = (
	'+'	=> 'match longest string and give nothing back',
	'?'	=> 'match shortest string first',
    );

    sub __explanation {
	return \%explanation;
    }

}

my %greediness = (
    '?' => MINIMUM_PERL,
    '+' => '5.009005',
);

=head2 could_be_greediness

 PPIx::Regexp::Token::Greediness->could_be_greediness( '?' );

This method returns true if the given string could be a greediness
indicator; that is, if it is '+' or '?'.

=cut

sub could_be_greediness {
    my ( undef, $string ) = @_;		# Invocant unused
    return $greediness{$string};
}

sub perl_version_introduced {
    my ( $self ) = @_;
    return $greediness{ $self->content() } || MINIMUM_PERL;
}

sub __PPIX_TOKENIZER__regexp {
    my ( undef, $tokenizer, $character ) = @_;	# Invocant, $char_type unused

    $tokenizer->prior_significant_token( 'is_quantifier' )
	or return;

    $greediness{$character} or return;

    return length $character;
}

1;

__END__