1.2.1556. ext/parle

Extension Parser and Lexer.

The parle extension provides lexing and parsing facilities. The implementation is based on » Ben Hanson’s libraries and requires a » C++14 capable compiler.

<?php

use Parle\{Token, Lexer, LexerException};

/* name => id */
$token = array(
        'EOI' => 0,
        'COMMA' => 1,
        'CRLF' => 2,
        'DECIMAL' => 3,
);
/* id => name */
$token_rev = array_flip($token);

$lex = new Lexer;
$lex->push("[\x2c]", $token['COMMA']);
$lex->push("[\r][\n]", $token['CRLF']);
$lex->push("[\d]+", $token['DECIMAL']);
$lex->build();

$in = "0,1,2\r\n3,42,5\r\n6,77,8\r\n";

$lex->consume($in);

do {
        $lex->advance();
        $tok = $lex->getToken();

        if (Token::UNKNOWN == $tok->id) {
                throw new LexerException('Unknown token "'.$tok->value.'" at offset '.$tok->offset.'.');
        }

        echo 'TOKEN: ', $token_rev[$tok->id], PHP_EOL;
} while (Token::EOI != $tok->id);

?>

See also Parsing and Lexing.

1.2.1556.1. Specs

Short name	Extensions/Extparle
Rulesets	All, Appinfo, CE
Exakat since	0.12.12
PHP Version	All
Severity
Time To Fix
Precision	Very high
Available in	Entreprise Edition, Community Edition, Exakat Cloud