ParserFactory to correctly create Php7/Php8

Author: ondrejmirtes

conf/config.neon

@@ -1864,7 +1864,11 @@ services:
 		autowired: false
 
 	currentPhpVersionPhpParser:
-		class: PhpParser\Parser\Php8 # todo use factory and create Php7/Php8
+		factory: @currentPhpVersionPhpParserFactory::create()
+		autowired: false
+
+	currentPhpVersionPhpParserFactory:
+		class: PHPStan\Parser\PhpParserFactory
 		arguments:
 			lexer: @currentPhpVersionLexer
 		autowired: false

src/Parser/PhpParserFactory.php

@@ -0,0 +1,28 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Parser;
+
+use PhpParser\Lexer;
+use PhpParser\Parser\Php7;
+use PhpParser\Parser\Php8;
+use PhpParser\ParserAbstract;
+use PHPStan\Php\PhpVersion;
+
+class PhpParserFactory
+{
+
+	public function __construct(private Lexer $lexer, private PhpVersion $phpVersion)
+	{
+	}
+
+	public function create(): ParserAbstract
+	{
+		$phpVersion = \PhpParser\PhpVersion::fromString($this->phpVersion->getVersionString());
+		if ($this->phpVersion->getVersionId() >= 80000) {
+			return new Php8($this->lexer, $phpVersion);
+		}
+
+		return new Php7($this->lexer, $phpVersion);
+	}
+
+}