| 1: | <?php declare(strict_types = 1); |
| 2: | |
| 3: | namespace PHPStan\Analyser; |
| 4: | |
| 5: | use PHPStan\ShouldNotHappenException; |
| 6: | |
| 7: | |
| 8: | class TypeSpecifierContext |
| 9: | { |
| 10: | |
| 11: | public const CONTEXT_TRUE = 0b0001; |
| 12: | public const CONTEXT_TRUTHY_BUT_NOT_TRUE = 0b0010; |
| 13: | public const CONTEXT_TRUTHY = self::CONTEXT_TRUE | self::CONTEXT_TRUTHY_BUT_NOT_TRUE; |
| 14: | public const CONTEXT_FALSE = 0b0100; |
| 15: | public const CONTEXT_FALSEY_BUT_NOT_FALSE = 0b1000; |
| 16: | public const CONTEXT_FALSEY = self::CONTEXT_FALSE | self::CONTEXT_FALSEY_BUT_NOT_FALSE; |
| 17: | public const CONTEXT_BITMASK = 0b1111; |
| 18: | |
| 19: | |
| 20: | private static array $registry; |
| 21: | |
| 22: | private function __construct(private ?int $value) |
| 23: | { |
| 24: | } |
| 25: | |
| 26: | private static function create(?int $value): self |
| 27: | { |
| 28: | self::$registry[$value] ??= new self($value); |
| 29: | return self::$registry[$value]; |
| 30: | } |
| 31: | |
| 32: | public static function createTrue(): self |
| 33: | { |
| 34: | return self::create(self::CONTEXT_TRUE); |
| 35: | } |
| 36: | |
| 37: | public static function createTruthy(): self |
| 38: | { |
| 39: | return self::create(self::CONTEXT_TRUTHY); |
| 40: | } |
| 41: | |
| 42: | public static function createFalse(): self |
| 43: | { |
| 44: | return self::create(self::CONTEXT_FALSE); |
| 45: | } |
| 46: | |
| 47: | public static function createFalsey(): self |
| 48: | { |
| 49: | return self::create(self::CONTEXT_FALSEY); |
| 50: | } |
| 51: | |
| 52: | public static function createNull(): self |
| 53: | { |
| 54: | return self::create(null); |
| 55: | } |
| 56: | |
| 57: | public function negate(): self |
| 58: | { |
| 59: | if ($this->value === null) { |
| 60: | throw new ShouldNotHappenException(); |
| 61: | } |
| 62: | return self::create(~$this->value & self::CONTEXT_BITMASK); |
| 63: | } |
| 64: | |
| 65: | public function true(): bool |
| 66: | { |
| 67: | return $this->value !== null && (bool) ($this->value & self::CONTEXT_TRUE); |
| 68: | } |
| 69: | |
| 70: | public function truthy(): bool |
| 71: | { |
| 72: | return $this->value !== null && (bool) ($this->value & self::CONTEXT_TRUTHY); |
| 73: | } |
| 74: | |
| 75: | public function false(): bool |
| 76: | { |
| 77: | return $this->value !== null && (bool) ($this->value & self::CONTEXT_FALSE); |
| 78: | } |
| 79: | |
| 80: | public function falsey(): bool |
| 81: | { |
| 82: | return $this->value !== null && (bool) ($this->value & self::CONTEXT_FALSEY); |
| 83: | } |
| 84: | |
| 85: | public function null(): bool |
| 86: | { |
| 87: | return $this->value === null; |
| 88: | } |
| 89: | |
| 90: | } |
| 91: | |