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<?php declare(strict_types=1);
/*
* This file is part of sebastian/type.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\Type;
use const PHP_VERSION;
use function get_class;
use function gettype;
use function strtolower;
use function version_compare;
abstract class Type
{
public static function fromValue($value, bool $allowsNull): self
{
if ($value === false) {
return new FalseType;
}
$typeName = gettype($value);
if ($typeName === 'object') {
return new ObjectType(TypeName::fromQualifiedName(get_class($value)), $allowsNull);
}
$type = self::fromName($typeName, $allowsNull);
if ($type instanceof SimpleType) {
$type = new SimpleType($typeName, $allowsNull, $value);
}
return $type;
}
public static function fromName(string $typeName, bool $allowsNull): self
{
if (version_compare(PHP_VERSION, '8.1.0-dev', '>=') && strtolower($typeName) === 'never') {
return new NeverType;
}
switch (strtolower($typeName)) {
case 'callable':
return new CallableType($allowsNull);
case 'false':
return new FalseType;
case 'iterable':
return new IterableType($allowsNull);
case 'null':
return new NullType;
case 'object':
return new GenericObjectType($allowsNull);
case 'unknown type':
return new UnknownType;
case 'void':
return new VoidType;
case 'array':
case 'bool':
case 'boolean':
case 'double':
case 'float':
case 'int':
case 'integer':
case 'real':
case 'resource':
case 'resource (closed)':
case 'string':
return new SimpleType($typeName, $allowsNull);
default:
return new ObjectType(TypeName::fromQualifiedName($typeName), $allowsNull);
}
}
public function asString(): string
{
return ($this->allowsNull() ? '?' : '') . $this->name();
}
public function isCallable(): bool
{
return false;
}
public function isFalse(): bool
{
return false;
}
public function isGenericObject(): bool
{
return false;
}
public function isIntersection(): bool
{
return false;
}
public function isIterable(): bool
{
return false;
}
public function isMixed(): bool
{
return false;
}
public function isNever(): bool
{
return false;
}
public function isNull(): bool
{
return false;
}
public function isObject(): bool
{
return false;
}
public function isSimple(): bool
{
return false;
}
public function isStatic(): bool
{
return false;
}
public function isUnion(): bool
{
return false;
}
public function isUnknown(): bool
{
return false;
}
public function isVoid(): bool
{
return false;
}
abstract public function isAssignable(self $other): bool;
abstract public function name(): string;
abstract public function allowsNull(): bool;
}
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