From 7f5320b1673d247229308aef5d9441dab5259e18 Mon Sep 17 00:00:00 2001
From: Tim Caswell <tim@creationix.com>
Date: Fri, 28 May 2010 12:17:16 -0700
Subject: [PATCH] Provide a hook for user-specified inspect functions

---
 lib/sys.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/sys.js b/lib/sys.js
index d37eab27995..7aba932205b 100644
--- a/lib/sys.js
+++ b/lib/sys.js
@@ -32,6 +32,11 @@ var error = exports.error = function (x) {
 exports.inspect = function (obj, showHidden, depth) {
   var seen = [];
   function format(value, recurseTimes) {
+    // Provide a hook for user-specified inspect functions.
+    if (value && typeof value.inspect === 'function') {
+      return value.inspect(recurseTimes);
+    }
+
     // Primitive types cannot have properties
     switch (typeof value) {
       case 'undefined': return 'undefined';