Fixed getting class constants PHPDoc from wrong file

Author: ondrejmirtes

src/Reflection/ClassReflection.php

@@ -691,10 +691,11 @@ public function getConstant(string $name): ConstantReflection
 			$deprecatedDescription = null;
 			$isDeprecated = false;
 			$isInternal = false;
-			if ($reflectionConstant->getDocComment() !== false && $this->getFileName() !== false) {
+			$declaringClass = $reflectionConstant->getDeclaringClass();
+			$fileName = $declaringClass->getFileName();
+			if ($reflectionConstant->getDocComment() !== false && $fileName !== false) {
 				$docComment = $reflectionConstant->getDocComment();
-				$fileName = $this->getFileName();
-				$className = $reflectionConstant->getDeclaringClass()->getName();
+				$className = $declaringClass->getName();
 				$resolvedPhpDoc = $this->fileTypeMapper->getResolvedPhpDoc($fileName, $className, null, null, $docComment);
 
 				$deprecatedDescription = $resolvedPhpDoc->getDeprecatedTag() !== null ? $resolvedPhpDoc->getDeprecatedTag()->getMessage() : null;
@@ -703,7 +704,7 @@ public function getConstant(string $name): ConstantReflection
 			}
 
 			$this->constants[$name] = new ClassConstantReflection(
-				$this->reflectionProvider->getClass($reflectionConstant->getDeclaringClass()->getName()),
+				$this->reflectionProvider->getClass($declaringClass->getName()),
 				$reflectionConstant,
 				$deprecatedDescription,
 				$isDeprecated,

tests/PHPStan/Reflection/ClassReflectionTest.php

@@ -9,6 +9,7 @@
 use PHPStan\Broker\Broker;
 use PHPStan\Php\PhpVersion;
 use PHPStan\Type\FileTypeMapper;
+use WrongClassConstantFile\SecuredRouter;
 
 class ClassReflectionTest extends \PHPStan\Testing\TestCase
 {
@@ -211,4 +212,12 @@ public function testIsAttributeClass(string $className, bool $expected, int $exp
 		$this->assertSame($expectedFlags, $reflection->getAttributeClassFlags());
 	}
 
+	public function testDeprecatedConstantFromAnotherFile(): void
+	{
+		$reflectionProvider = $this->createBroker();
+		$reflection = $reflectionProvider->getClass(SecuredRouter::class);
+		$constant = $reflection->getConstant('SECURED');
+		$this->assertTrue($constant->isDeprecated()->yes());
+	}
+
 }

tests/PHPStan/Reflection/data/IRouter.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace WrongClassConstantFile;
+
+interface IRouter
+{
+
+	/** @deprecated */
+	const SECURED = 's';
+
+}

tests/PHPStan/Reflection/data/SecuredRouter.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace WrongClassConstantFile;
+
+class SecuredRouter implements IRouter
+{
+
+}