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package PPI::Token::Number::Float; |
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=pod |
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=head1 NAME |
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PPI::Token::Number::Float - Token class for a floating-point number |
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=head1 SYNOPSIS |
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$n = 1.234; |
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=head1 INHERITANCE |
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PPI::Token::Number::Float |
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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 class is used for tokens that |
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represent floating point numbers. A float is identified by n decimal |
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point. Exponential notation (the C or C) is handled by the |
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PPI::Token::Number::Exp class. |
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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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27391
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our $VERSION = '1.276'; |
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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: 10. |
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=cut |
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sub base() { 10 } |
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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 $str = $self->_literal; |
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my $neg = $str =~ s/^\-//; |
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$str =~ s/^\./0./; |
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my $val = 0+$str; |
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return $neg ? -$val : $val; |
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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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8244
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10348
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my $class = shift; |
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8872
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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 underscores straight through |
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8244
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return 1 if $char eq '_'; |
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# Allow digits |
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return 1 if $char =~ /\d/o; |
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if ( $char eq '.' ) { # A second decimal point? That gets complicated. |
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if ( $t->{token}{content} =~ /\.$/ ) { |
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# We have a .., which is an operator. Take the . off the end of the |
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# token and finish it, then make the .. operator. |
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chop $t->{token}{content}; |
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$t->{class} = $t->{token}->set_class( 'Number' ); |
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$t->_new_token('Operator', '..'); |
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return 0; |
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} elsif ( $t->{token}{content} =~ /\._/ ) { |
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($t->{token}{content}, my $bareword) |
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= split /\./, $t->{token}{content}; |
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$t->{class} = $t->{token}->set_class( 'Number' ); |
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$t->_new_token('Operator', '.'); |
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$t->_new_token('Word', $bareword); |
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$t->_new_token('Operator', '.'); |
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return 0; |
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} else { |
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$t->{class} = $t->{token}->set_class( 'Number::Version' ); |
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return 1; |
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} |
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} |
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# perl seems to regard pretty much anything that's not strictly an exp num |
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# as float + stuff |
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1436
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my $char2 = substr $t->{line}, $t->{line_cursor}+1, 1; |
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1436
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if ("$char$char2" =~ /[eE][0-9+-]/) { |
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$t->{class} = $t->{token}->set_class( 'Number::Exp' ); |
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return 1; |
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} |
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# Doesn't fit a special case, or is after the end of the token |
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# End of token. |
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$t->_finalize_token->__TOKENIZER__on_char( $t ); |
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} |
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1; |
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120
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=pod |
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122
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=head1 SUPPORT |
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See the L in the main module. |
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126
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=head1 AUTHOR |
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128
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Chris Dolan Ecdolan@cpan.orgE |
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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 |