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StringType.php
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StringType.php
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<?php
declare(strict_types=1);
namespace Phan\Language\Type;
use Phan\CodeBase;
use Phan\Config;
use Phan\Language\Context;
use Phan\Language\Type;
use Phan\Language\UnionType;
/**
* Represents the type `string`.
* @see LiteralStringType for the representation of types for specific string literals
* @phan-pure
*/
class StringType extends ScalarType
{
use NativeTypeTrait;
/** @phan-override */
public const NAME = 'string';
protected function canCastToNonNullableType(Type $type, CodeBase $code_base): bool
{
// CallableDeclarationType is not a native type, we check separately here
return parent::canCastToNonNullableType($type, $code_base) || $type instanceof CallableDeclarationType;
}
protected function canCastToNonNullableTypeWithoutConfig(Type $type, CodeBase $code_base): bool
{
// CallableDeclarationType is not a native type, we check separately here
return parent::canCastToNonNullableTypeWithoutConfig($type, $code_base) || $type instanceof CallableDeclarationType;
}
/**
* @unused-param $code_base
*/
protected function isSubtypeOfNonNullableType(Type $type, CodeBase $code_base): bool
{
return \get_class($type) === self::class || $type instanceof ScalarRawType || $type instanceof MixedType;
}
/** @override */
public function isPossiblyNumeric(): bool
{
return true;
}
public function canCastToDeclaredType(CodeBase $code_base, Context $context, Type $other): bool
{
// Allow casting scalars to other scalars, but not to null.
if ($other instanceof ScalarType) {
return $other instanceof StringType || (!$context->isStrictTypes() && parent::canCastToDeclaredType($code_base, $context, $other));
}
return $other instanceof CallableType ||
$other instanceof TemplateType ||
$other instanceof MixedType;
}
/**
* Returns true if this contains a type that is definitely non-callable
* e.g. returns true for false, array, int
* returns false for callable, string, array, object, iterable, T, etc.
* @unused-param $code_base
*/
public function isDefiniteNonCallableType(CodeBase $code_base): bool
{
return false;
}
/**
* Returns the type after an expression such as `++$x`
*/
public function getTypeAfterIncOrDec(): UnionType
{
return UnionType::fromFullyQualifiedPHPDocString('int|string|float');
}
public function isValidNumericOperand(): bool
{
if (Config::getValue('scalar_implicit_cast')) {
return true;
}
$string_casts = Config::getValue('scalar_implicit_partial')['string'] ?? null;
if (!\is_array($string_casts)) {
return false;
}
return \in_array('int', $string_casts, true) || \in_array('float', $string_casts, true);
}
public function isPossiblyFalsey(): bool
{
return true;
}
public function isPossiblyTruthy(): bool
{
return true;
}
public function isAlwaysFalsey(): bool
{
return false;
}
public function isAlwaysTruthy(): bool
{
return false;
}
/**
* @unused-param $code_base
*/
public function asCallableType(CodeBase $code_base): ?Type
{
return CallableStringType::instance(false);
}
public function asNonFalseyType(): Type
{
return NonEmptyStringType::instance(false);
}
}
\class_exists(ClassStringType::class);
\class_exists(NonEmptyStringType::class);
\class_exists(CallableStringType::class);

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text/x-php
Expires
Sat, May 16, 22:40 (2 h, 16 m)
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Storage Format
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Storage Handle
c5/66/e00d11374279e510618c73438095
Default Alt Text
StringType.php (3 KB)

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