TypePHP 编译器 https://swoole.com/aot/
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307 B

<?php
class ParentParamBase {}
trait ParentParamRequirement
{
abstract public function accept(parent|null $value): void;
}
class InvalidParentParamImplementation extends ParentParamBase
{
use ParentParamRequirement;
public function accept(stdClass|null $value): void {}
}
function main() {}