From 6c100176163f39ce43a188cf63a655264f6a4813 Mon Sep 17 00:00:00 2001
From: hyung-hwan <hyunghwan.chung@gmail.com>
Date: Wed, 8 Aug 2018 03:47:12 +0000
Subject: [PATCH] added 2 lines of comments

---
 hcl/lib/comp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hcl/lib/comp.c b/hcl/lib/comp.c
index df1807b..bd7c773 100644
--- a/hcl/lib/comp.c
+++ b/hcl/lib/comp.c
@@ -1485,6 +1485,8 @@ static int compile_cons_xlist_expression (hcl_t* hcl, hcl_oop_t obj)
 
 		if (HCL_IS_SYMBOL(hcl, car))
 		{
+			/* only symbols are added to the system dictionary. 
+			 * perform this lookup only if car is a symbol */
 			sdc = hcl_getatsysdic(hcl, car);
 			if (sdc)
 			{