scopeClass parameter is deprecated, warn about that

Author: janedbal

src/Command/CommandHelper.php

@@ -11,6 +11,7 @@
 use Nette\Schema\ValidationException;
 use Nette\Utils\AssertionException;
 use Nette\Utils\Strings;
+use PHPStan\Analyser\MutatingScope;
 use PHPStan\Command\Symfony\SymfonyOutput;
 use PHPStan\Command\Symfony\SymfonyStyle;
 use PHPStan\DependencyInjection\Container;
@@ -472,6 +473,12 @@ public static function begin(
 			$errorOutput->writeLineFormatted(sprintf('Parameter <fg=cyan>excludes_analyse</> has been deprecated so use <fg=cyan>excludePaths</> only from now on.'));
 		}
 
+		if ($container->hasParameter('scopeClass') && $container->getParameter('scopeClass') !== MutatingScope::class) {
+			$errorOutput->writeLineFormatted('⚠️  You\'re using a deprecated config option <fg=cyan>scopeClass</>. ⚠️️');
+			$errorOutput->writeLineFormatted('');
+			$errorOutput->writeLineFormatted(sprintf('Please implement PHPStan\Type\ExpressionTypeResolverExtension interface instead and register it as a service.'));
+		}
+
 		$tempResultCachePath = $container->getParameter('tempResultCachePath');
 		$createDir($tempResultCachePath);