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<?php declare(strict_types = 1);
namespace MethodSignaturePureUnlessParameterPassed;
interface PureUnlessParent
{
/**
* @param-out int $count
* @pure-unless-parameter-passed $count
*/
public function replace(string $subject, int &$count = 0): string;
}
class ImpureChild implements PureUnlessParent
{
/**
* @phpstan-impure
*/
public function replace(string $subject, int &$count = 0): string
{
echo 'side effect';
$count = 1;
return $subject;
}
}
class InheritingChild implements PureUnlessParent
{
public function replace(string $subject, int &$count = 0): string
{
$count = 1;
return $subject;
}
}
class PureChild implements PureUnlessParent
{
/**
* @phpstan-pure
*/
public function replace(string $subject, int &$count = 0): string
{
return $subject;
}
}
/**
* @phpstan-all-methods-pure
*/
class AllMethodsPureChild implements PureUnlessParent
{
public function replace(string $subject, int &$count = 0): string
{
return $subject;
}
}
/**
* The inherited @pure-unless-parameter-passed takes precedence over the
* class-level tag, as an inherited @phpstan-pure does.
*
* @phpstan-all-methods-impure
*/
class AllMethodsImpureChild implements PureUnlessParent
{
public function replace(string $subject, int &$count = 0): string
{
echo 'side effect';
$count = 1;
return $subject;
}
}
/**
* @phpstan-all-methods-pure
*/
class AllMethodsPureParent
{
/**
* @param-out int $count
* @pure-unless-parameter-passed $count
*/
public function replace(string $subject, int &$count = 0): string
{
$count = 1;
return $subject;
}
}
class ImpureChildOfAllMethodsPureParent extends AllMethodsPureParent
{
/**
* @phpstan-impure
*/
public function replace(string $subject, int &$count = 0): string
{
echo 'side effect';
$count = 1;
return $subject;
}
}