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PPIx::Regexp::Lexer(3pm) User Contributed Perl Documentation PPIx::Regexp::Lexer(3pm)

NAME

PPIx::Regexp::Lexer - Assemble tokenizer output.

SYNOPSIS

 use PPIx::Regexp::Lexer;
 use PPIx::Regexp::Dumper;
 my $lex = PPIx::Regexp::Lexer->new('qr{foo}smx');
 my $dmp = PPIx::Regexp::Dumper->new( $lex );
 $dmp->print();

INHERITANCE

"PPIx::Regexp::Lexer" is a PPIx::Regexp::Support.

"PPIx::Regexp::Lexer" has no descendants.

DESCRIPTION

This class takes the token stream generated by PPIx::Regexp::Tokenizer and generates the parse tree.

METHODS

This class provides the following public methods. Methods not documented here are private, and unsupported in the sense that the author reserves the right to change or remove them without notice.

new

This method instantiates the lexer. It takes as its argument either a PPIx::Regexp::Tokenizer or the text to be parsed. In the latter case the tokenizer is instantiated from the text.

Any optional name/value pairs after the first argument are passed to the tokenizer, which interprets them or not as the case may be.

errstr

This method returns the error string from the last attempt to instantiate a "PPIx::Regexp::Lexer". If the last attempt succeeded, the error will be "undef".

failures

 print $lexer->failures(), " parse failures\n";

This method returns the number of parse failures encountered. A parse failure is either a tokenization failure (see PPIx::Regexp::Tokenizer->failures()) or a structural error.

lex

This method lexes the tokens in the text, and returns the lexed list of elements.

strict

This method returns true or false based on the value of the 'strict' argument to "new()".

SUPPORT

Support is by the author. Please file bug reports at <https://rt.cpan.org/Public/Dist/Display.html?Name=PPIx-Regexp>, <https://github.com/trwyant/perl-PPIx-Regexp/issues>, or in electronic mail to the author.

AUTHOR

Thomas R. Wyant, III wyant at cpan dot org

COPYRIGHT AND LICENSE

Copyright (C) 2009-2023 by Thomas R. Wyant, III

This program is free software; you can redistribute it and/or modify it under the same terms as Perl 5.10.0. For more details, see the full text of the licenses in the directory LICENSES.

This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.

2023-03-05 perl v5.36.0