Optimization for < PHP 8.0 analysis

Author: ondrejmirtes

src/Parser/RichParser.php

@@ -9,6 +9,7 @@
 use PhpParser\NodeVisitor\NodeConnectingVisitor;
 use PHPStan\File\FileReader;
 use PHPStan\NodeVisitor\StatementOrderVisitor;
+use PHPStan\Php\PhpVersion;
 
 class RichParser implements Parser
 {
@@ -25,13 +26,16 @@ class RichParser implements Parser
 
 	private NodeChildrenVisitor $nodeChildrenVisitor;
 
+	private PhpVersion $phpVersion;
+
 	public function __construct(
 		\PhpParser\Parser $parser,
 		Lexer $lexer,
 		NameResolver $nameResolver,
 		NodeConnectingVisitor $nodeConnectingVisitor,
 		StatementOrderVisitor $statementOrderVisitor,
-		NodeChildrenVisitor $nodeChildrenVisitor
+		NodeChildrenVisitor $nodeChildrenVisitor,
+		PhpVersion $phpVersion
 	)
 	{
 		$this->parser = $parser;
@@ -40,6 +44,7 @@ public function __construct(
 		$this->nodeConnectingVisitor = $nodeConnectingVisitor;
 		$this->statementOrderVisitor = $statementOrderVisitor;
 		$this->nodeChildrenVisitor = $nodeChildrenVisitor;
+		$this->phpVersion = $phpVersion;
 	}
 
 	/**
@@ -75,11 +80,18 @@ public function parseString(string $sourceCode): array
 		$nodeTraverser->addVisitor($this->nameResolver);
 		$nodeTraverser->addVisitor($this->nodeConnectingVisitor);
 		$nodeTraverser->addVisitor($this->statementOrderVisitor);
-		$nodeTraverser->addVisitor($this->nodeChildrenVisitor);
+
+		if ($this->phpVersion->requiresParenthesesForNestedTernaries()) {
+			$nodeTraverser->addVisitor($this->nodeChildrenVisitor);
+		}
 
 		/** @var array<\PhpParser\Node\Stmt> */
 		$nodes = $nodeTraverser->traverse($nodes);
 
+		if (!$this->phpVersion->requiresParenthesesForNestedTernaries()) {
+			return $nodes;
+		}
+
 		$tokensTraverser = new NodeTraverser();
 		$tokensTraverser->addVisitor(new NodeTokensVisitor($tokens));
 

tests/PHPStan/Analyser/AnalyserTest.php

@@ -527,7 +527,8 @@ private function createAnalyser(bool $reportUnmatchedIgnoredErrors): \PHPStan\An
 				new \PhpParser\NodeVisitor\NameResolver(),
 				new NodeConnectingVisitor(),
 				new StatementOrderVisitor(),
-				new NodeChildrenVisitor()
+				new NodeChildrenVisitor(),
+				self::getContainer()->getByType(PhpVersion::class)
 			),
 			new DependencyResolver($fileHelper, $broker, new ExportedNodeResolver($fileTypeMapper, $printer)),
 			$reportUnmatchedIgnoredErrors

tests/PHPStan/Rules/Ternary/RequireParenthesesForNestedTernaryRuleTest.php

@@ -27,6 +27,9 @@ public function testDoNotReportBeforePhp80(): void
 
 	public function testReportOnPhp80(): void
 	{
+		if (PHP_VERSION_ID < 80000) {
+			$this->markTestSkipped('Test requires PHP 8.0');
+		}
 		$this->phpVersion = new PhpVersion(80000);
 		$tip = 'See: https://wiki.php.net/rfc/ternary_associativity';
 		$this->analyse([__DIR__ . '/data/nested-ternary.php'], [
@@ -50,6 +53,9 @@ public function testReportOnPhp80(): void
 
 	public function testBug(): void
 	{
+		if (PHP_VERSION_ID < 80000) {
+			$this->markTestSkipped('Test requires PHP 8.0');
+		}
 		$this->phpVersion = new PhpVersion(80000);
 		$this->analyse([__DIR__ . '/data/require-parentheses-bug.php'], []);
 	}