From cde179b36979c58d9380d3c4dd29b61412d13b51 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Thu, 4 Nov 1999 15:23:12 -0200
Subject: new implementation for global variable values (separated from
 strings)

---
 lparser.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'lparser.c')

diff --git a/lparser.c b/lparser.c
index 06f21e81..740ab03a 100644
--- a/lparser.c
+++ b/lparser.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 1.40 1999/09/02 13:13:22 roberto Exp roberto $
+** $Id: lparser.c,v 1.41 1999/09/20 14:15:18 roberto Exp roberto $
 ** LL(1) Parser and code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -232,6 +232,13 @@ static void code_constant (LexState *ls, int c) {
 }
 
 
+static void assertglobal (LexState *ls, int index) {
+  TObject *o = &ls->fs->f->consts[index];
+  LUA_ASSERT(ttype(o) == LUA_T_STRING, "global name is not a string");
+  luaS_assertglobal(tsvalue(o));
+}
+
+
 static int next_constant (FuncState *fs) {
   TProtoFunc *f = fs->f;
   luaM_growvector(f->consts, f->nconsts, 1, TObject, constantEM, MAX_ARG);
@@ -478,6 +485,7 @@ static void lua_pushvar (LexState *ls, vardesc *var) {
       break;
     case VGLOBAL:
       code_oparg(ls, GETGLOBAL, var->info, 1);
+      assertglobal(ls, var->info);  /* make sure that there is a global */
       break;
     case VDOT:
       code_oparg(ls, GETDOTTED, var->info, 0);
@@ -501,6 +509,7 @@ static void storevar (LexState *ls, const vardesc *var) {
       break;
     case VGLOBAL:
       code_oparg(ls, SETGLOBAL, var->info, -1);
+      assertglobal(ls, var->info);  /* make sure that there is a global */
       break;
     case VINDEXED:
       code_opcode(ls, SETTABLEPOP, -3);
-- 
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