From b89b1acf95188bc74e3e528a72bf22ce30e1b677 Mon Sep 17 00:00:00 2001
From: zartdinov <zartdinov@gmail.com>
Date: Wed, 8 Jul 2015 18:57:25 +0000
Subject: asyncify Promises

---
 lib/async.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/async.js b/lib/async.js
index cbd2678..d9e6244 100644
--- a/lib/async.js
+++ b/lib/async.js
@@ -1186,10 +1186,18 @@
             var result;
             try {
                 result = func.apply(this, args);
+                // if result is Promise object
+                if (typeof result.then === "function") {
+                    result.then(function(values) {
+                        var args = [null].concat(values);
+                        callback.apply(this, args);
+                    }).catch(callback);
+                } else {
+                    callback(null, result);
+                }
             } catch (e) {
                 return callback(e);
             }
-            callback(null, result);
         });
     };
 
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