1<?php declare(strict_types=1); 2 3namespace PhpParser; 4 5/** 6 * Modifiers used (as a bit mask) by various flags subnodes, for example on classes, functions, 7 * properties and constants. 8 */ 9final class Modifiers { 10 public const PUBLIC = 1; 11 public const PROTECTED = 2; 12 public const PRIVATE = 4; 13 public const STATIC = 8; 14 public const ABSTRACT = 16; 15 public const FINAL = 32; 16 public const READONLY = 64; 17 18 public const VISIBILITY_MASK = 1 | 2 | 4; 19 20 /** 21 * @internal 22 */ 23 public static function verifyClassModifier(int $a, int $b): void { 24 if ($a & Modifiers::ABSTRACT && $b & Modifiers::ABSTRACT) { 25 throw new Error('Multiple abstract modifiers are not allowed'); 26 } 27 28 if ($a & Modifiers::FINAL && $b & Modifiers::FINAL) { 29 throw new Error('Multiple final modifiers are not allowed'); 30 } 31 32 if ($a & Modifiers::READONLY && $b & Modifiers::READONLY) { 33 throw new Error('Multiple readonly modifiers are not allowed'); 34 } 35 36 if ($a & 48 && $b & 48) { 37 throw new Error('Cannot use the final modifier on an abstract class'); 38 } 39 } 40 41 /** 42 * @internal 43 */ 44 public static function verifyModifier(int $a, int $b): void { 45 if ($a & Modifiers::VISIBILITY_MASK && $b & Modifiers::VISIBILITY_MASK) { 46 throw new Error('Multiple access type modifiers are not allowed'); 47 } 48 49 if ($a & Modifiers::ABSTRACT && $b & Modifiers::ABSTRACT) { 50 throw new Error('Multiple abstract modifiers are not allowed'); 51 } 52 53 if ($a & Modifiers::STATIC && $b & Modifiers::STATIC) { 54 throw new Error('Multiple static modifiers are not allowed'); 55 } 56 57 if ($a & Modifiers::FINAL && $b & Modifiers::FINAL) { 58 throw new Error('Multiple final modifiers are not allowed'); 59 } 60 61 if ($a & Modifiers::READONLY && $b & Modifiers::READONLY) { 62 throw new Error('Multiple readonly modifiers are not allowed'); 63 } 64 65 if ($a & 48 && $b & 48) { 66 throw new Error('Cannot use the final modifier on an abstract class member'); 67 } 68 } 69} 70
