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67 lines
1.6 KiB
PHP
67 lines
1.6 KiB
PHP
<?php
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/**
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* Abuse filter parser.
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* Copyright © Victor Vasiliev, 2008.
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* Based on ideas by Andrew Garrett
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* Distributed under GNU GPL v2 terms.
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*
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* Types of token:
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* * T_NONE - special-purpose token
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* * T_BRACE - ( or )
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* * T_COMMA - ,
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* * T_OP - operator like + or ^
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* * T_NUMBER - number
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* * T_STRING - string, in "" or ''
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* * T_KEYWORD - keyword
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* * T_ID - identifier
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* * T_STATEMENT_SEPARATOR - ;
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* * T_SQUARE_BRACKETS - [ or ]
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*
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* Levels of parsing:
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* * Entry - catches unexpected characters
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* * Semicolon - ;
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* * Set - :=
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* * Conditionls (IF) - if-then-else-end, cond ? a :b
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* * BoolOps (BO) - &, |, ^
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* * CompOps (CO) - ==, !=, ===, !==, >, <, >=, <=
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* * SumRel (SR) - +, -
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* * MulRel (MR) - *, /, %
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* * Pow (P) - **
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* * BoolNeg (BN) - ! operation
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* * SpecialOperators (SO) - in and like
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* * Unarys (U) - plus and minus in cases like -5 or -(2 * +2)
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* * ListElement (LE) - list[number]
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* * Braces (B) - ( and )
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* * Functions (F)
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* * Atom (A) - return value
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*/
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class AFPToken {
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// Types of tken
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const TNONE = 'T_NONE';
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const TID = 'T_ID';
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const TKEYWORD = 'T_KEYWORD';
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const TSTRING = 'T_STRING';
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const TINT = 'T_INT';
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const TFLOAT = 'T_FLOAT';
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const TOP = 'T_OP';
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const TBRACE = 'T_BRACE';
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const TSQUAREBRACKET = 'T_SQUARE_BRACKET';
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const TCOMMA = 'T_COMMA';
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const TSTATEMENTSEPARATOR = 'T_STATEMENT_SEPARATOR';
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public $type;
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public $value;
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public $pos;
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/**
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* @param string $type
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* @param AFPToken|null $value
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* @param int $pos
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*/
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public function __construct( $type = self::TNONE, $value = null, $pos = 0 ) {
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$this->type = $type;
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$this->value = $value;
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$this->pos = $pos;
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}
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}
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