Special

NullableType

class NullableType implements Type
{
    public function __construct(
        public readonly Type $innerType
    ) {}
}

Represents any type that is nullable. This includes nullable NamedType, but also literal null in unions:

• ?string, string|null
• string|int|null

MixedType

class MixedType implements Type {}

Represents mixed type.

NeverType

class NeverType implements Type {}

Represents the never type.

VoidType

class VoidType implements Type {}

Represents the void type.

ErrorType

class ErrorType implements Type
{
    public function __construct(
        public readonly string $type,
    ) {}
}

Represents any type that either failed to parse, or isn’t supported by the type system yet. It contains the string that failed to parse for easier debugging.