125 lines
2.9 KiB
Perl
125 lines
2.9 KiB
Perl
package PPI::Token::Operator;
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=pod
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=head1 NAME
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PPI::Token::Operator - Token class for operators
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=head1 INHERITANCE
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PPI::Token::Operator
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isa PPI::Token
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isa PPI::Element
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=head1 SYNOPSIS
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# This is the list of valid operators
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++ -- ** ! ~ + -
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=~ !~ * / % x
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<< >> lt gt le ge cmp ~~
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== != <=> . .. ... ,
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& | ^ && || //
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? : **= += -= .= *= /=
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%= x= &= |= ^= <<= >>= &&=
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||= //= < > <= >= <> => ->
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and or xor not eq ne <<>>
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=head1 DESCRIPTION
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All operators in PPI are created as C<PPI::Token::Operator> objects,
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including the ones that may superficially look like a L<PPI::Token::Word>
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object.
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=head1 METHODS
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There are no additional methods beyond those provided by the parent
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L<PPI::Token> and L<PPI::Element> classes.
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=cut
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use strict;
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use PPI::Token ();
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use PPI::Singletons '%OPERATOR';
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our $VERSION = '1.270'; # VERSION
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our @ISA = "PPI::Token";
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#####################################################################
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# Tokenizer Methods
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sub __TOKENIZER__on_char {
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my $t = $_[1];
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my $char = substr( $t->{line}, $t->{line_cursor}, 1 );
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# Are we still an operator if we add the next character
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my $content = $t->{token}->{content};
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# special case for <<>> operator
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if(length($content) < 4 &&
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$content . substr( $t->{line}, $t->{line_cursor}, 4 - length($content) ) eq '<<>>') {
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return 1;
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}
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return 1 if $OPERATOR{ $content . $char };
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# Handle the special case of a .1234 decimal number
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if ( $content eq '.' ) {
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if ( $char =~ /^[0-9]$/ ) {
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# This is a decimal number
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$t->{class} = $t->{token}->set_class('Number::Float');
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return $t->{class}->__TOKENIZER__on_char( $t );
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}
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}
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# Handle the special case if we might be a here-doc
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if ( $content eq '<<' ) {
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pos $t->{line} = $t->{line_cursor};
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# Either <<FOO or << 'FOO' or <<\FOO or
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# <<~FOO or <<~ 'FOO' or <<~\FOO
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### Is the zero-width look-ahead assertion really
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### supposed to be there?
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if ( $t->{line} =~ m/\G ~? (?: (?!\d)\w | \s*['"`] | \\\w ) /gcx ) {
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# This is a here-doc.
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# Change the class and move to the HereDoc's own __TOKENIZER__on_char method.
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$t->{class} = $t->{token}->set_class('HereDoc');
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return $t->{class}->__TOKENIZER__on_char( $t );
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}
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}
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# Handle the special case of the null Readline
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$t->{class} = $t->{token}->set_class('QuoteLike::Readline')
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if $content eq '<>' or $content eq '<<>>';
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# Finalize normally
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$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 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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Adam Kennedy E<lt>adamk@cpan.orgE<gt>
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=head1 COPYRIGHT
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Copyright 2001 - 2011 Adam Kennedy.
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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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