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