From 51471ba74821d7caee9e4c9dd11faf70d614f533 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Mon, 15 Aug 2011 16:41:58 -0300
Subject: comments about use of 'luaH_set'

---
 llex.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'llex.c')

diff --git a/llex.c b/llex.c
index d14ff03e..2cf8d16e 100644
--- a/llex.c
+++ b/llex.c
@@ -1,5 +1,5 @@
 /*
-** $Id: llex.c,v 2.56 2011/08/09 20:58:29 roberto Exp roberto $
+** $Id: llex.c,v 2.57 2011/08/11 17:06:12 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -128,6 +128,8 @@ TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
   setsvalue2s(L, L->top++, ts);  /* temporarily anchor it in stack */
   o = luaH_set(L, ls->fs->h, L->top - 1);
   if (ttisnil(o)) {  /* not in use yet? (see 'addK') */
+    /* boolean value does not need GC barrier;
+       table has no metatable, so it does not need to invalidate cache */
     setbvalue(o, 1);  /* t[string] = true */
     luaC_checkGC(L);
   }
-- 
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