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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\AbuseFilter\Parser; |
| 4 | |
| 5 | /** |
| 6 | * Abuse filter parser. |
| 7 | * Copyright © Victor Vasiliev, 2008. |
| 8 | * Based on ideas by Andrew Garrett |
| 9 | * Distributed under GNU GPL v2 terms. |
| 10 | * |
| 11 | * Types of token: |
| 12 | * * T_NONE - special-purpose token |
| 13 | * * T_BRACE - ( or ) |
| 14 | * * T_COMMA - , |
| 15 | * * T_OP - operator like + or ^ |
| 16 | * * T_NUMBER - number |
| 17 | * * T_STRING - string, in "" or '' |
| 18 | * * T_KEYWORD - keyword |
| 19 | * * T_ID - identifier |
| 20 | * * T_STATEMENT_SEPARATOR - ; |
| 21 | * * T_SQUARE_BRACKETS - [ or ] |
| 22 | * |
| 23 | * Levels of parsing: |
| 24 | * * Entry - catches unexpected characters |
| 25 | * * Semicolon - ; |
| 26 | * * Set - := |
| 27 | * * Conditionals (IF) - if-then-else-end, cond ? a :b |
| 28 | * * BoolOps (BO) - &, |, ^ |
| 29 | * * CompOps (CO) - ==, !=, ===, !==, >, <, >=, <= |
| 30 | * * SumRel (SR) - +, - |
| 31 | * * MulRel (MR) - *, /, % |
| 32 | * * Pow (P) - ** |
| 33 | * * BoolNeg (BN) - ! operation |
| 34 | * * SpecialOperators (SO) - in and like |
| 35 | * * Unarys (U) - plus and minus in cases like -5 or -(2 * +2) |
| 36 | * * ArrayElement (AE) - array[number] |
| 37 | * * Braces (B) - ( and ) |
| 38 | * * Functions (F) |
| 39 | * * Atom (A) - return value |
| 40 | */ |
| 41 | class AFPToken { |
| 42 | public const TNONE = 'T_NONE'; |
| 43 | public const TID = 'T_ID'; |
| 44 | public const TKEYWORD = 'T_KEYWORD'; |
| 45 | public const TSTRING = 'T_STRING'; |
| 46 | public const TINT = 'T_INT'; |
| 47 | public const TFLOAT = 'T_FLOAT'; |
| 48 | public const TOP = 'T_OP'; |
| 49 | public const TBRACE = 'T_BRACE'; |
| 50 | public const TSQUAREBRACKET = 'T_SQUARE_BRACKET'; |
| 51 | public const TCOMMA = 'T_COMMA'; |
| 52 | public const TSTATEMENTSEPARATOR = 'T_STATEMENT_SEPARATOR'; |
| 53 | |
| 54 | /** |
| 55 | * @var string One of the T* constant from this class |
| 56 | */ |
| 57 | public $type; |
| 58 | /** |
| 59 | * @var mixed|null The actual value of the token |
| 60 | */ |
| 61 | public $value; |
| 62 | /** |
| 63 | * @var int The code offset where this token is found |
| 64 | */ |
| 65 | public $pos; |
| 66 | |
| 67 | /** |
| 68 | * @param string $type |
| 69 | * @param mixed|null $value |
| 70 | * @param int $pos |
| 71 | */ |
| 72 | public function __construct( $type = self::TNONE, $value = null, $pos = 0 ) { |
| 73 | $this->type = $type; |
| 74 | $this->value = $value; |
| 75 | $this->pos = $pos; |
| 76 | } |
| 77 | } |