165 lines
3.4 KiB
Perl
165 lines
3.4 KiB
Perl
package PPI::Token::Number::Version;
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=pod
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=head1 NAME
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PPI::Token::Number::Version - Token class for a byte-packed number
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=head1 SYNOPSIS
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$n = 1.1.0;
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$n = 127.0.0.1;
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$n = 10_000.10_000.10_000;
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$n = v1.2.3.4
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=head1 INHERITANCE
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PPI::Token::Number::Version
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isa PPI::Token::Number
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isa PPI::Token
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isa PPI::Element
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=head1 DESCRIPTION
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The C<PPI::Token::Number::Version> class is used for tokens that have
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multiple decimal points. In truth, these aren't treated like numbers
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at all by Perl, but they look like numbers to a parser.
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=head1 METHODS
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=cut
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use strict;
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use PPI::Token::Number ();
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our $VERSION = '1.270'; # VERSION
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our @ISA = "PPI::Token::Number";
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=pod
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=head2 base
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Returns the base for the number: 256.
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=cut
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sub base() { 256 }
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=pod
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=head2 literal
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Return the numeric value of this token.
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=cut
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sub literal {
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my $self = shift;
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my $content = $self->{content};
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$content =~ s/^v//;
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return join '', map { chr $_ } ( split /\./, $content );
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}
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#####################################################################
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# Tokenizer Methods
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sub __TOKENIZER__on_char {
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my $class = shift;
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my $t = shift;
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my $char = substr( $t->{line}, $t->{line_cursor}, 1 );
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# Allow digits
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return 1 if $char =~ /\d/o;
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if( $char eq '_' ) {
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return 1 if $t->{token}{content} !~ /\.$/;
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chop $t->{token}->{content};
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$t->{class} = $t->{token}->set_class( 'Number::Float' )
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if $t->{token}{content} !~ /\..+\./;
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$t->_new_token('Operator', '.');
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$t->_new_token('Word', '_');
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return 0;
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}
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# Is this a second decimal point in a row? Then the '..' operator
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if ( $char eq '.' ) {
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if ( $t->{token}->{content} =~ /\.$/ ) {
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# We have a .., which is an operator.
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# Take the . off the end of the token..
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# and finish it, then make the .. operator.
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chop $t->{token}->{content};
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$t->{class} = $t->{token}->set_class( 'Number::Float' )
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if $t->{token}{content} !~ /\..+\./;
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$t->_new_token('Operator', '..');
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return 0;
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} else {
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return 1;
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}
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}
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# Doesn't fit a special case, or is after the end of the token
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# End of token.
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$t->_finalize_token->__TOKENIZER__on_char( $t );
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}
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sub __TOKENIZER__commit {
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my $t = $_[1];
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# Capture the rest of the token
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pos $t->{line} = $t->{line_cursor};
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# This was not a v-string after all (it's a word);
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return PPI::Token::Word->__TOKENIZER__commit($t)
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if $t->{line} !~ m/\G(v\d[_\d]*(?:\.\d[_\d]*)+|v\d[_\d]*\b)/gc;
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my $content = $1;
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# If there are no periods this could be a word starting with v\d
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# Forced to be a word. Done.
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return PPI::Token::Word->__TOKENIZER__commit($t)
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if $content !~ /\./ and $t->__current_token_is_forced_word($content);
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# This is a v-string
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$t->{line_cursor} += length $content;
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$t->_new_token( 'Number::Version', $content );
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$t->_finalize_token->__TOKENIZER__on_char($t);
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}
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1;
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=pod
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=head1 BUGS
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- Does not handle leading minus sign correctly. Should translate to a DashedWord.
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See L<http://perlmonks.org/?node_id=574573>
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-95.0.1.0 --> "-_\000\cA\000"
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-96.0.1.0 --> Argument "`\0^A\0" isn't numeric in negation (-)
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=head1 SUPPORT
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See the L<support section|PPI/SUPPORT> in the main module.
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=head1 AUTHOR
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Chris Dolan E<lt>cdolan@cpan.orgE<gt>
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=head1 COPYRIGHT
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Copyright 2006 Chris Dolan.
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This program is free software; you can redistribute
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it and/or modify it under the same terms as Perl itself.
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The full text of the license can be found in the
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LICENSE file included with this module.
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=cut
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