From 00059f9ec5b3ea9089a31e2ca0a44f16bdaeb7e7 Mon Sep 17 00:00:00 2001
From: Doug Coleman <doug.coleman@gmail.com>
Date: Tue, 30 Jun 2015 21:18:52 -0700
Subject: [PATCH] classes.tuple: Add a note about "defining-class"

---
 core/classes/tuple/tuple.factor | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/classes/tuple/tuple.factor b/core/classes/tuple/tuple.factor
index d8ea8b02d4..50235dce68 100644
--- a/core/classes/tuple/tuple.factor
+++ b/core/classes/tuple/tuple.factor
@@ -240,6 +240,9 @@ M: tuple-class update-class
         [ define-tuple-prototype ]
     } cleave ;
 
+! The "defining-class" word-prop is to ensure that the tuple being
+! defined becomes a classoid as it's being parsed so that it can
+! be used as the type of its own slots.
 : define-new-tuple-class ( class superclass slots -- )
     {
         [ drop f f tuple-class define-class ]