Sha256: 768ca6c115a0fd5bdd30b0ac51d149bd317c2c95cdcb0ee9e8e0801c4c8befe8
Contents?: true
Size: 1.91 KB
Versions: 36
Compression:
Stored size: 1.91 KB
Contents
package PPI::Token::Number::Binary;
=pod
=head1 NAME
PPI::Token::Number::Binary - Token class for a binary number
=head1 SYNOPSIS
$n = 0b1110011; # binary integer
=head1 INHERITANCE
PPI::Token::Number::Binary
isa PPI::Token::Number
isa PPI::Token
isa PPI::Element
=head1 DESCRIPTION
The C<PPI::Token::Number::Binary> class is used for tokens that
represent base-2 numbers.
=head1 METHODS
=cut
use strict;
use PPI::Token::Number ();
our $VERSION = '1.276';
our @ISA = "PPI::Token::Number";
=pod
=head2 base
Returns the base for the number: 2.
=cut
sub base() { 2 }
=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/^\-//;
$str =~ s/^0[bB]//;
my $val = 0;
for my $bit ( $str =~ m/(.)/g ) {
$val = $val * 2 + $bit;
}
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 =~ /[\w\d]/ ) {
unless ( $char eq '1' or $char eq '0' ) {
# Add a warning if it contains non-binary chars
$t->{token}->{_error} = "Illegal character in binary number '$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
Version data entries
36 entries across 12 versions & 1 rubygems