NamedArgumentsRule - report only on PHP 8.0+

Author: ondrejmirtes

build/PHPStan/Build/NamedArgumentsRule.php

@@ -5,6 +5,7 @@
 use PhpParser\Node;
 use PHPStan\Analyser\ArgumentsNormalizer;
 use PHPStan\Analyser\Scope;
+use PHPStan\Php\PhpVersion;
 use PHPStan\Reflection\ExtendedParametersAcceptor;
 use PHPStan\Reflection\ReflectionProvider;
 use PHPStan\Rules\IdentifierRuleError;
@@ -22,7 +23,10 @@
 final class NamedArgumentsRule implements Rule
 {
 
-	public function __construct(private ReflectionProvider $reflectionProvider)
+	public function __construct(
+		private ReflectionProvider $reflectionProvider,
+		private PhpVersion $phpVersion,
+	)
 	{
 	}
 
@@ -33,6 +37,10 @@ public function getNodeType(): string
 
 	public function processNode(Node $node, Scope $scope): array
 	{
+		if (!$this->phpVersion->supportsNamedArguments()) {
+			return [];
+		}
+
 		if ($node->isFirstClassCallable()) {
 			return [];
 		}

tests/PHPStan/Build/NamedArgumentsRuleTest.php

@@ -2,6 +2,7 @@
 
 namespace PHPStan\Build;
 
+use PHPStan\Php\PhpVersion;
 use PHPStan\Rules\Rule;
 use PHPStan\Testing\RuleTestCase;
 use const PHP_VERSION_ID;
@@ -14,7 +15,7 @@ class NamedArgumentsRuleTest extends RuleTestCase
 
 	protected function getRule(): Rule
 	{
-		return new NamedArgumentsRule($this->createReflectionProvider());
+		return new NamedArgumentsRule($this->createReflectionProvider(), new PhpVersion(PHP_VERSION_ID));
 	}
 
 	public function testRule(): void
@@ -41,6 +42,10 @@ public function testRule(): void
 
 	public function testNoFix(): void
 	{
+		if (PHP_VERSION_ID < 80000) {
+			$this->markTestSkipped('Test requires PHP 8.0.');
+		}
+
 		$this->fix(
 			__DIR__ . '/data/named-arguments-no-errors.php',
 			__DIR__ . '/data/named-arguments-no-errors.php',
@@ -49,6 +54,10 @@ public function testNoFix(): void
 
 	public function testFix(): void
 	{
+		if (PHP_VERSION_ID < 80000) {
+			$this->markTestSkipped('Test requires PHP 8.0.');
+		}
+
 		$this->fix(
 			__DIR__ . '/data/named-arguments.php',
 			__DIR__ . '/data/named-arguments.php.fixed',