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<?php
/**
* PHP_ParserGenerator, a php 5 parser generator.
*
* This is a direct port of the Lemon parser generator, found at
* {@link http://www.hwaci.com/sw/lemon/}
*
* PHP version 5
*
* LICENSE: This source file is subject to version 3.01 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_01.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category php
* @package PHP_ParserGenerator
* @author Gregory Beaver <cellog@php.net>
* @copyright 2006 Gregory Beaver
* @license http://www.php.net/license/3_01.txt PHP License 3.01
* @version CVS: $Id$
* @since File available since Release 0.1.0
*/
/**
* Each production rule in the grammar is stored in this class
*
* @package PHP_ParserGenerator
* @author Gregory Beaver <cellog@php.net>
* @copyright 2006 Gregory Beaver
* @license http://www.php.net/license/3_01.txt PHP License 3.01
* @version 0.1.0
* @since Class available since Release 0.1.0
*/
class PHP_ParserGenerator_Rule {
/**
* Left-hand side of the rule
* @var array an array of {@link PHP_ParserGenerator_Symbol} objects
*/
public $lhs;
/**
* Alias for the LHS (NULL if none)
*
* @var array
*/
public $lhsalias = array();
/**
* Line number for the rule
* @var int
*/
public $ruleline;
/**
* Number of right-hand side symbols
*/
public $nrhs;
/**
* The right-hand side symbols
* @var array an array of {@link PHP_ParserGenerator_Symbol} objects
*/
public $rhs;
/**
* Aliases for each right-hand side symbol, or null if no alis.
*
* In this rule:
* <pre>
* foo ::= BAR(A) baz(B).
* </pre>
*
* The right-hand side aliases are A for BAR, and B for baz.
* @var array aliases are indexed by the right-hand side symbol index.
*/
public $rhsalias = array();
/**
* Line number at which code begins
* @var int
*/
public $line;
/**
* The code executed when this rule is reduced
*
* <pre>
* foo(R) ::= BAR(A) baz(B). {R = A + B;}
* </pre>
*
* In the rule above, the code is "R = A + B;"
* @var string|0
*/
public $code;
/**
* Precedence symbol for this rule
* @var PHP_ParserGenerator_Symbol
*/
public $precsym;
/**
* An index number for this rule
*
* Used in both naming of reduce functions and determining which rule code
* to use for reduce actions
* @var int
*/
public $index;
/**
* True if this rule is ever reduced
* @var boolean
*/
public $canReduce;
/**
* Next rule with the same left-hand side
* @var PHP_ParserGenerator_Rule|0
*/
public $nextlhs;
/**
* Next rule in the global list
* @var PHP_ParserGenerator_Rule|0
*/
public $next;
}