| 1: | <?php declare(strict_types = 1); |
| 2: | |
| 3: | namespace PHPStan\Type; |
| 4: | |
| 5: | use PHPStan\PhpDocParser\Ast\Type\ConditionalTypeNode; |
| 6: | use PHPStan\PhpDocParser\Ast\Type\TypeNode; |
| 7: | use PHPStan\Type\Generic\TemplateTypeVariance; |
| 8: | use PHPStan\Type\Traits\LateResolvableTypeTrait; |
| 9: | use PHPStan\Type\Traits\NonGeneralizableTypeTrait; |
| 10: | use function array_merge; |
| 11: | use function sprintf; |
| 12: | |
| 13: | |
| 14: | final class ConditionalType implements CompoundType, LateResolvableType |
| 15: | { |
| 16: | |
| 17: | use LateResolvableTypeTrait; |
| 18: | use NonGeneralizableTypeTrait; |
| 19: | |
| 20: | private ?Type $normalizedIf = null; |
| 21: | |
| 22: | private ?Type $normalizedElse = null; |
| 23: | |
| 24: | private ?Type $subjectWithTargetIntersectedType = null; |
| 25: | |
| 26: | private ?Type $subjectWithTargetRemovedType = null; |
| 27: | |
| 28: | public function __construct( |
| 29: | private Type $subject, |
| 30: | private Type $target, |
| 31: | private Type $if, |
| 32: | private Type $else, |
| 33: | private bool $negated, |
| 34: | ) |
| 35: | { |
| 36: | } |
| 37: | |
| 38: | public function getSubject(): Type |
| 39: | { |
| 40: | return $this->subject; |
| 41: | } |
| 42: | |
| 43: | public function getTarget(): Type |
| 44: | { |
| 45: | return $this->target; |
| 46: | } |
| 47: | |
| 48: | public function getIf(): Type |
| 49: | { |
| 50: | return $this->if; |
| 51: | } |
| 52: | |
| 53: | public function getElse(): Type |
| 54: | { |
| 55: | return $this->else; |
| 56: | } |
| 57: | |
| 58: | public function isNegated(): bool |
| 59: | { |
| 60: | return $this->negated; |
| 61: | } |
| 62: | |
| 63: | public function isSuperTypeOf(Type $type): IsSuperTypeOfResult |
| 64: | { |
| 65: | if ($type instanceof self) { |
| 66: | return $this->if->isSuperTypeOf($type->if) |
| 67: | ->and($this->else->isSuperTypeOf($type->else)); |
| 68: | } |
| 69: | |
| 70: | return $this->isSuperTypeOfDefault($type); |
| 71: | } |
| 72: | |
| 73: | public function getReferencedClasses(): array |
| 74: | { |
| 75: | return array_merge( |
| 76: | $this->subject->getReferencedClasses(), |
| 77: | $this->target->getReferencedClasses(), |
| 78: | $this->if->getReferencedClasses(), |
| 79: | $this->else->getReferencedClasses(), |
| 80: | ); |
| 81: | } |
| 82: | |
| 83: | public function getReferencedTemplateTypes(TemplateTypeVariance $positionVariance): array |
| 84: | { |
| 85: | return array_merge( |
| 86: | $this->subject->getReferencedTemplateTypes($positionVariance), |
| 87: | $this->target->getReferencedTemplateTypes($positionVariance), |
| 88: | $this->if->getReferencedTemplateTypes($positionVariance), |
| 89: | $this->else->getReferencedTemplateTypes($positionVariance), |
| 90: | ); |
| 91: | } |
| 92: | |
| 93: | public function equals(Type $type): bool |
| 94: | { |
| 95: | return $type instanceof self |
| 96: | && $this->subject->equals($type->subject) |
| 97: | && $this->target->equals($type->target) |
| 98: | && $this->if->equals($type->if) |
| 99: | && $this->else->equals($type->else); |
| 100: | } |
| 101: | |
| 102: | public function describe(VerbosityLevel $level): string |
| 103: | { |
| 104: | return sprintf( |
| 105: | '(%s %s %s ? %s : %s)', |
| 106: | $this->subject->describe($level), |
| 107: | $this->negated ? 'is not' : 'is', |
| 108: | $this->target->describe($level), |
| 109: | $this->if->describe($level), |
| 110: | $this->else->describe($level), |
| 111: | ); |
| 112: | } |
| 113: | |
| 114: | public function isResolvable(): bool |
| 115: | { |
| 116: | return !TypeUtils::containsTemplateType($this->subject) && !TypeUtils::containsTemplateType($this->target); |
| 117: | } |
| 118: | |
| 119: | protected function getResult(): Type |
| 120: | { |
| 121: | $isSuperType = $this->target->isSuperTypeOf($this->subject); |
| 122: | |
| 123: | if ($isSuperType->yes()) { |
| 124: | return !$this->negated ? $this->getNormalizedIf() : $this->getNormalizedElse(); |
| 125: | } |
| 126: | |
| 127: | if ($isSuperType->no()) { |
| 128: | return !$this->negated ? $this->getNormalizedElse() : $this->getNormalizedIf(); |
| 129: | } |
| 130: | |
| 131: | return TypeCombinator::union( |
| 132: | $this->getNormalizedIf(), |
| 133: | $this->getNormalizedElse(), |
| 134: | ); |
| 135: | } |
| 136: | |
| 137: | public function traverse(callable $cb): Type |
| 138: | { |
| 139: | $subject = $cb($this->subject); |
| 140: | $target = $cb($this->target); |
| 141: | $if = $cb($this->getNormalizedIf()); |
| 142: | $else = $cb($this->getNormalizedElse()); |
| 143: | |
| 144: | if ( |
| 145: | $this->subject === $subject |
| 146: | && $this->target === $target |
| 147: | && $this->getNormalizedIf() === $if |
| 148: | && $this->getNormalizedElse() === $else |
| 149: | ) { |
| 150: | return $this; |
| 151: | } |
| 152: | |
| 153: | return new self($subject, $target, $if, $else, $this->negated); |
| 154: | } |
| 155: | |
| 156: | public function traverseSimultaneously(Type $right, callable $cb): Type |
| 157: | { |
| 158: | if (!$right instanceof self) { |
| 159: | return $this; |
| 160: | } |
| 161: | |
| 162: | $subject = $cb($this->subject, $right->subject); |
| 163: | $target = $cb($this->target, $right->target); |
| 164: | $if = $cb($this->getNormalizedIf(), $right->getNormalizedIf()); |
| 165: | $else = $cb($this->getNormalizedElse(), $right->getNormalizedElse()); |
| 166: | |
| 167: | if ( |
| 168: | $this->subject === $subject |
| 169: | && $this->target === $target |
| 170: | && $this->getNormalizedIf() === $if |
| 171: | && $this->getNormalizedElse() === $else |
| 172: | ) { |
| 173: | return $this; |
| 174: | } |
| 175: | |
| 176: | return new self($subject, $target, $if, $else, $this->negated); |
| 177: | } |
| 178: | |
| 179: | public function toPhpDocNode(): TypeNode |
| 180: | { |
| 181: | return new ConditionalTypeNode( |
| 182: | $this->subject->toPhpDocNode(), |
| 183: | $this->target->toPhpDocNode(), |
| 184: | $this->if->toPhpDocNode(), |
| 185: | $this->else->toPhpDocNode(), |
| 186: | $this->negated, |
| 187: | ); |
| 188: | } |
| 189: | |
| 190: | private function getNormalizedIf(): Type |
| 191: | { |
| 192: | return $this->normalizedIf ??= TypeTraverser::map( |
| 193: | $this->if, |
| 194: | fn (Type $type, callable $traverse) => $type === $this->subject |
| 195: | ? (!$this->negated ? $this->getSubjectWithTargetIntersectedType() : $this->getSubjectWithTargetRemovedType()) |
| 196: | : $traverse($type), |
| 197: | ); |
| 198: | } |
| 199: | |
| 200: | private function getNormalizedElse(): Type |
| 201: | { |
| 202: | return $this->normalizedElse ??= TypeTraverser::map( |
| 203: | $this->else, |
| 204: | fn (Type $type, callable $traverse) => $type === $this->subject |
| 205: | ? (!$this->negated ? $this->getSubjectWithTargetRemovedType() : $this->getSubjectWithTargetIntersectedType()) |
| 206: | : $traverse($type), |
| 207: | ); |
| 208: | } |
| 209: | |
| 210: | private function getSubjectWithTargetIntersectedType(): Type |
| 211: | { |
| 212: | return $this->subjectWithTargetIntersectedType ??= TypeCombinator::intersect($this->subject, $this->target); |
| 213: | } |
| 214: | |
| 215: | private function getSubjectWithTargetRemovedType(): Type |
| 216: | { |
| 217: | return $this->subjectWithTargetRemovedType ??= TypeCombinator::remove($this->subject, $this->target); |
| 218: | } |
| 219: | |
| 220: | } |
| 221: | |