From 7fff4499fd915bcea3fa93b1aa8b35f4fe7a6027 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Sun, 28 May 2017 00:38:50 +0200
Subject: add linting (and some initial fixes)

---
 node_modules/is-error/index.js | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 node_modules/is-error/index.js

(limited to 'node_modules/is-error/index.js')

diff --git a/node_modules/is-error/index.js b/node_modules/is-error/index.js
new file mode 100644
index 000000000..c0b4dbeab
--- /dev/null
+++ b/node_modules/is-error/index.js
@@ -0,0 +1,23 @@
+'use strict';
+
+var objectToString = Object.prototype.toString;
+var getPrototypeOf = Object.getPrototypeOf;
+var ERROR_TYPE = '[object Error]';
+
+module.exports = function isError(err) {
+    if (typeof err !== 'object') {
+        return false;
+    }
+    if (err instanceof Error) {
+        // Accept `AssertionError`s from the `assert` module that ships
+        // with Node.js v6.1.0, compare issue #4.
+        return true;
+    }
+    while (err) {
+        if (objectToString.call(err) === ERROR_TYPE) {
+            return true;
+        }
+        err = getPrototypeOf(err);
+    }
+    return false;
+};
-- 
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