| 1: | <?php declare(strict_types=1); |
| 2: | |
| 3: | namespace PhpParser; |
| 4: | |
| 5: | |
| 6: | |
| 7: | |
| 8: | |
| 9: | final 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: | public const PUBLIC_SET = 128; |
| 18: | public const PROTECTED_SET = 256; |
| 19: | public const PRIVATE_SET = 512; |
| 20: | |
| 21: | public const VISIBILITY_MASK = self::PUBLIC | self::PROTECTED | self::PRIVATE; |
| 22: | |
| 23: | public const VISIBILITY_SET_MASK = self::PUBLIC_SET | self::PROTECTED_SET | self::PRIVATE_SET; |
| 24: | |
| 25: | private const TO_STRING_MAP = [ |
| 26: | self::PUBLIC => 'public', |
| 27: | self::PROTECTED => 'protected', |
| 28: | self::PRIVATE => 'private', |
| 29: | self::STATIC => 'static', |
| 30: | self::ABSTRACT => 'abstract', |
| 31: | self::FINAL => 'final', |
| 32: | self::READONLY => 'readonly', |
| 33: | self::PUBLIC_SET => 'public(set)', |
| 34: | self::PROTECTED_SET => 'protected(set)', |
| 35: | self::PRIVATE_SET => 'private(set)', |
| 36: | ]; |
| 37: | |
| 38: | public static function toString(int $modifier): string { |
| 39: | if (!isset(self::TO_STRING_MAP[$modifier])) { |
| 40: | throw new \InvalidArgumentException("Unknown modifier $modifier"); |
| 41: | } |
| 42: | return self::TO_STRING_MAP[$modifier]; |
| 43: | } |
| 44: | |
| 45: | private static function isValidModifier(int $modifier): bool { |
| 46: | $isPow2 = ($modifier & ($modifier - 1)) == 0 && $modifier != 0; |
| 47: | return $isPow2 && $modifier <= self::PRIVATE_SET; |
| 48: | } |
| 49: | |
| 50: | |
| 51: | |
| 52: | |
| 53: | public static function verifyClassModifier(int $a, int $b): void { |
| 54: | assert(self::isValidModifier($b)); |
| 55: | if (($a & $b) != 0) { |
| 56: | throw new Error( |
| 57: | 'Multiple ' . self::toString($b) . ' modifiers are not allowed'); |
| 58: | } |
| 59: | |
| 60: | if ($a & 48 && $b & 48) { |
| 61: | throw new Error('Cannot use the final modifier on an abstract class'); |
| 62: | } |
| 63: | } |
| 64: | |
| 65: | |
| 66: | |
| 67: | |
| 68: | public static function verifyModifier(int $a, int $b): void { |
| 69: | assert(self::isValidModifier($b)); |
| 70: | if (($a & Modifiers::VISIBILITY_MASK && $b & Modifiers::VISIBILITY_MASK) || |
| 71: | ($a & Modifiers::VISIBILITY_SET_MASK && $b & Modifiers::VISIBILITY_SET_MASK) |
| 72: | ) { |
| 73: | throw new Error('Multiple access type modifiers are not allowed'); |
| 74: | } |
| 75: | |
| 76: | if (($a & $b) != 0) { |
| 77: | throw new Error( |
| 78: | 'Multiple ' . self::toString($b) . ' modifiers are not allowed'); |
| 79: | } |
| 80: | |
| 81: | if ($a & 48 && $b & 48) { |
| 82: | throw new Error('Cannot use the final modifier on an abstract class member'); |
| 83: | } |
| 84: | } |
| 85: | } |
| 86: | |