Parse::LexEvent - Generator of event-oriented lexical analyzers (1.00 ALPHA)
Parse::LexEvent
use Parse::LexEvent; sub string { print $_[0]->name, ": $_[1]\n"; } sub comment { print $_[0]->name, ": $_[1]\n"; } sub remainder { print $_[0]->name, ": $_[1]\n"; } $lexer = Parse::LexEvent->new()->configure( From => \*DATA, Tokens => [ Type => 'Simple', Name => 'ccomment', Handler => 'comment', Regex => '//.*\n', Type => 'Delimited', Name => 'comment', Handler => 'comment', Start => '/[*]', End => '[*]/', Type => 'Quoted', Name => 'squotes', Handler => 'string', Quote => qq!\'!, Type => 'Quoted', Name => 'dquotes', Handler => 'string', Quote => qq!\"!, Type => 'Simple', Name => 'remainder', Regex => '(?s:[^/\'\"]+)', ReadMore => 1, ] )->parse(); __END__ /* C comment */ // C++ comment var d = "string in double quotes"; var s = 'string in single quotes'; var i = 10; var y = 100;
Parse::LexEvent generates lexical analyzers in the fashion of Parse::Lex, but the generated analyzers emit an event at the finish of recognition of each token. This event corresponds to the call of a procedure whose name is that of the token. It is possible to give a different name to this procedure by making use of the Handler parameter when defining a token.
Parse::Lex
Handler
An application using Parse::LexEvent must define the required procedures. These procedures take the token object as first argument and the recognized character string as the second.
Parse::LexEvent inherits from Parse::ALex and possesses all the methods described in the documentation of the Parse::Lex class, except for the methods analyze(), every() next(), and nextis().
Parse::ALex
analyze()
every()
next()
nextis()
This method runs the analysis of data specified by from().
from()
cparser.pl - This analyzer recognizes three types of structures: C ou C++ comments, strings within quotation marks, and the rest. It emits an event specific to each. You can use it, for example, to analyze C, C++ or Javascript programs.
Parse::Lex, Parse::Token.
Parse::Token
Philippe Verdret.
Copyright (c) 1999 Philippe Verdret. All rights reserved. This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
To install Parse::Lex, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Parse::Lex
CPAN shell
perl -MCPAN -e shell install Parse::Lex
For more information on module installation, please visit the detailed CPAN module installation guide.