From 6a84c329005ab7fc3f17283feda3f41010728288 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 8 Oct 2019 10:29:38 -0300
Subject: No coercion string->number in arithmetic with LUA_NOCVTS2N

---
 lstrlib.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'lstrlib.c')

diff --git a/lstrlib.c b/lstrlib.c
index 7f4a0184..48acb8bf 100644
--- a/lstrlib.c
+++ b/lstrlib.c
@@ -233,6 +233,17 @@ static int str_dump (lua_State *L) {
 ** =======================================================
 */
 
+#if defined(LUA_NOCVTS2N)	/* { */
+
+/* no coercion from strings to numbers */
+
+static const luaL_Reg stringmetamethods[] = {
+  {"__index", NULL},  /* placeholder */
+  {NULL, NULL}
+};
+
+#else		/* }{ */
+
 static int tonum (lua_State *L, int arg) {
   if (lua_type(L, arg) == LUA_TNUMBER) {  /* already a number? */
     lua_pushvalue(L, arg);
@@ -311,6 +322,8 @@ static const luaL_Reg stringmetamethods[] = {
   {NULL, NULL}
 };
 
+#endif		/* } */
+
 /* }====================================================== */
 
 /*
-- 
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