From 099f909c817829477f5a158ce6ad7b3c89c0c710 Mon Sep 17 00:00:00 2001
From: dracony <draconyster@gmail.com>
Date: Sat, 31 Oct 2015 23:46:32 +0100
Subject: [PATCH] is_callable instead of method_exists '__invoke'

Looks more elegant and as an added bonus $app might now be any callable
---
 src/React/Espresso/Stack.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/React/Espresso/Stack.php b/src/React/Espresso/Stack.php
index 93ac52d..c7a1663 100644
--- a/src/React/Espresso/Stack.php
+++ b/src/React/Espresso/Stack.php
@@ -22,7 +22,7 @@ public function __construct($app)
             return new HttpServer($stack['socket']);
         });
 
-        $isFactory = is_object($app) && method_exists($app, '__invoke');
+        $isFactory = is_callable($app);
         $this['app'] = $isFactory ? $this->protectService($app) : $app;
     }