From daba8df47520608c5bd1dda9dcde63bce9141584 Mon Sep 17 00:00:00 2001
From: TomasVotruba <tomas.vot@gmail.com>
Date: Thu, 13 Feb 2020 11:32:49 +0100
Subject: [PATCH] improve original format in CallableTypeNode

---
 .../Type/AttributeAwareCallableTypeNode.php   | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/packages/attribute-aware-php-doc/src/Ast/Type/AttributeAwareCallableTypeNode.php b/packages/attribute-aware-php-doc/src/Ast/Type/AttributeAwareCallableTypeNode.php
index dc808a6218e..919ca8102eb 100644
--- a/packages/attribute-aware-php-doc/src/Ast/Type/AttributeAwareCallableTypeNode.php
+++ b/packages/attribute-aware-php-doc/src/Ast/Type/AttributeAwareCallableTypeNode.php
@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace Rector\AttributeAwarePhpDoc\Ast\Type;
 
 use PHPStan\PhpDocParser\Ast\Type\CallableTypeNode;
+use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
 use Rector\BetterPhpDocParser\Attributes\Attribute\AttributeTrait;
 use Rector\BetterPhpDocParser\Contract\PhpDocNode\AttributeAwareNodeInterface;
 
@@ -14,6 +15,28 @@ final class AttributeAwareCallableTypeNode extends CallableTypeNode implements A
 
     public function __toString(): string
     {
+        // keep original (Psalm?) format, see https://github.com/rectorphp/rector/issues/2841
+        if ($this->isExplicitCallable()) {
+            return $this->createExplicitCallable();
+        }
+
         return 'callable';
     }
+
+    private function isExplicitCallable(): bool
+    {
+        if (! $this->returnType instanceof IdentifierTypeNode) {
+            return false;
+        }
+
+        return $this->returnType->name !== 'mixed';
+    }
+
+    private function createExplicitCallable(): string
+    {
+        /** @var IdentifierTypeNode $returnType */
+        $returnType = $this->returnType;
+
+        return $this->identifier->name . '():' . $returnType->name;
+    }
 }