Introducing SimpleParser

conf/config.neon

@@ -519,7 +519,7 @@ services:
 	-
 		class: PHPStan\Parser\CachedParser
 		arguments:
-			originalParser: @currentPhpVersionParser
+			originalParser: @currentPhpVersionRichParser
 			cachedNodesByStringCountMax: %cache.nodesByStringCountMax%
 
 	-
@@ -1173,13 +1173,19 @@ services:
 			directory: %tmpDir%/cache/PHPStan
 		autowired: no
 
-	currentPhpVersionParser:
+	currentPhpVersionRichParser:
 		class: PHPStan\Parser\RichParser
 		arguments:
 			parser: @currentPhpVersionPhpParser
 			lexer: @currentPhpVersionLexer
 		autowired: no
 
+	currentPhpVersionSimpleParser:
+		class: PHPStan\Parser\SimpleParser
+		arguments:
+			parser: @currentPhpVersionPhpParser
+		autowired: no
+
 	phpParserDecorator:
 		class: PHPStan\Parser\PhpParserDecorator
 		arguments:

src/Parser/SimpleParser.php

@@ -0,0 +1,61 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Parser;
+
+use PhpParser\ErrorHandler\Collecting;
+use PhpParser\NodeTraverser;
+use PhpParser\NodeVisitor\NameResolver;
+use PHPStan\File\FileReader;
+
+class SimpleParser implements Parser
+{
+
+	private \PhpParser\Parser $parser;
+
+	private NameResolver $nameResolver;
+
+	public function __construct(
+		\PhpParser\Parser $parser,
+		NameResolver $nameResolver
+	)
+	{
+		$this->parser = $parser;
+		$this->nameResolver = $nameResolver;
+	}
+
+	/**
+	 * @param string $file path to a file to parse
+	 * @return \PhpParser\Node\Stmt[]
+	 */
+	public function parseFile(string $file): array
+	{
+		try {
+			return $this->parseString(FileReader::read($file));
+		} catch (\PHPStan\Parser\ParserErrorsException $e) {
+			throw new \PHPStan\Parser\ParserErrorsException($e->getErrors(), $file);
+		}
+	}
+
+	/**
+	 * @param string $sourceCode
+	 * @return \PhpParser\Node\Stmt[]
+	 */
+	public function parseString(string $sourceCode): array
+	{
+		$errorHandler = new Collecting();
+		$nodes = $this->parser->parse($sourceCode, $errorHandler);
+		if ($errorHandler->hasErrors()) {
+			throw new \PHPStan\Parser\ParserErrorsException($errorHandler->getErrors(), null);
+		}
+		if ($nodes === null) {
+			throw new \PHPStan\ShouldNotHappenException();
+		}
+
+		$nodeTraverser = new NodeTraverser();
+		$nodeTraverser->addVisitor($this->nameResolver);
+
+		/** @var array<\PhpParser\Node\Stmt> */
+		return $nodeTraverser->traverse($nodes);
+	}
+
+}