/usr/share/perl5/PPI/Token/Number.pm is in libppi-perl 1.218-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 | package PPI::Token::Number;
=pod
=head1 NAME
PPI::Token::Number - Token class for a number
=head1 SYNOPSIS
$n = 1234; # decimal integer
$n = 0b1110011; # binary integer
$n = 01234; # octal integer
$n = 0x1234; # hexadecimal integer
$n = 12.34e-56; # exponential notation ( currently not working )
=head1 INHERITANCE
PPI::Token::Number
isa PPI::Token
isa PPI::Element
=head1 DESCRIPTION
The C<PPI::Token::Number> class is used for tokens that represent numbers,
in the various types that Perl supports.
=head1 METHODS
=cut
use strict;
use PPI::Token ();
use vars qw{$VERSION @ISA};
BEGIN {
$VERSION = '1.218';
@ISA = 'PPI::Token';
}
=pod
=head2 base
The C<base> method is provided by all of the ::Number subclasses.
This is 10 for decimal, 16 for hexadecimal, 2 for binary, etc.
=cut
sub base() { 10 }
=pod
=head2 literal
Return the numeric value of this token.
=cut
sub literal {
return 0 + $_[0]->_literal;
}
sub _literal {
# De-sugar the string representation
my $self = shift;
my $string = $self->content;
$string =~ s/^\+//;
$string =~ s/_//g;
return $string;
}
#####################################################################
# 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 '_';
# Handle the conversion from an unknown to known type.
# The regex covers "potential" hex/bin/octal number.
my $token = $t->{token};
if ( $token->{content} =~ /^-?0_*$/ ) {
# This could be special
if ( $char eq 'x' || $char eq 'X' ) {
$t->{class} = $t->{token}->set_class( 'Number::Hex' );
return 1;
} elsif ( $char eq 'b' || $char eq 'B' ) {
$t->{class} = $t->{token}->set_class( 'Number::Binary' );
return 1;
} elsif ( $char =~ /\d/ ) {
# You cannot have 8s and 9s on octals
if ( $char eq '8' or $char eq '9' ) {
$token->{_error} = "Illegal character in octal number '$char'";
}
$t->{class} = $t->{token}->set_class( 'Number::Octal' );
return 1;
}
}
# Handle the easy case, integer or real.
return 1 if $char =~ /\d/o;
if ( $char eq '.' ) {
$t->{class} = $t->{token}->set_class( 'Number::Float' );
return 1;
}
if ( $char eq 'e' || $char eq 'E' ) {
$t->{class} = $t->{token}->set_class( 'Number::Exp' );
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 CAVEATS
Compared to Perl, the number tokenizer is too liberal about allowing
underscores anywhere. For example, the following is a syntax error in
Perl, but is allowed in PPI:
0_b10
=head1 TO DO
- Treat v-strings as binary strings or barewords, not as "base-256"
numbers
- Break out decimal integers into their own subclass?
- Implement literal()
=head1 SUPPORT
See the L<support section|PPI/SUPPORT> in the main module.
=head1 AUTHOR
Adam Kennedy E<lt>adamk@cpan.orgE<gt>
=head1 COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy.
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
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