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<?php declare(strict_types=1); namespace Psl\Type\Internal; use Psl\Type; use Psl\Type\Exception\AssertException; use Psl\Type\Exception\CoercionException; /** * @template T * * @extends Type\Type<T> * * @internal */ final class OptionalType extends Type\Type { /** * @param Type\TypeInterface<T> $inner */ public function __construct( private Type\TypeInterface $inner ) { } /** * @throws CoercionException * * @return T */ public function coerce(mixed $value): mixed { return $this->inner->withTrace($this->getTrace())->coerce($value); } /** * @throws AssertException * * @return T * * @psalm-assert T $value */ public function assert(mixed $value): mixed { return $this->inner->withTrace($this->getTrace())->assert($value); } /** * Return whether this type is optional. */ public function isOptional(): bool { return true; } /** * Returns a string representation of the type. */ public function toString(): string { return $this->inner->toString(); } }
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