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|
package PPI::Token::Number::Octal;
=pod
=head1 NAME
PPI::Token::Number::Octal - Token class for a binary number
=head1 SYNOPSIS
$n = 0777; # octal integer
=head1 INHERITANCE
PPI::Token::Number::Octal
isa PPI::Token::Number
isa PPI::Token
isa PPI::Element
=head1 DESCRIPTION
The C<PPI::Token::Number::Octal> class is used for tokens that
represent base-8 numbers.
=head1 METHODS
=cut
use strict;
use PPI::Token::Number ();
use vars qw{$VERSION @ISA};
BEGIN {
$VERSION = '1.215';
@ISA = 'PPI::Token::Number';
}
=pod
=head2 base
Returns the base for the number: 8.
=cut
sub base () { 8 }
=pod
=head2 literal
Return the numeric value of this token.
=cut
sub literal {
my $self = shift;
return if $self->{_error};
my $str = $self->_literal;
my $neg = $str =~ s/^\-//;
my $val = oct $str;
return $neg ? -$val : $val;
}
#####################################################################
# Tokenizer Methods
sub __TOKENIZER__on_char {
my $class = shift;
my $t = shift;
my $char = substr( $t->{line}, $t->{line_cursor}, 1 );
# Allow underscores straight through
return 1 if $char eq '_';
if ( $char =~ /\d/ ) {
# You cannot have 8s and 9s on octals
if ( $char eq '8' or $char eq '9' ) {
$t->{token}->{_error} = "Illegal character in octal number '$char'";
}
return 1;
}
# Doesn't fit a special case, or is after the end of the token
# End of token.
$t->_finalize_token->__TOKENIZER__on_char( $t );
}
1;
=pod
=head1 SUPPORT
See the L<support section|PPI/SUPPORT> in the main module.
=head1 AUTHOR
Chris Dolan E<lt>cdolan@cpan.orgE<gt>
=head1 COPYRIGHT
Copyright 2006 Chris Dolan.
This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the
LICENSE file included with this module.
=cut
|
