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default metatable can be NULL

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Roberto Ierusalimschy
2003-12-01 16:22:56 -02:00
parent 1d10acb355
commit af850484a9
8 changed files with 34 additions and 34 deletions
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13
ltm.c
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@@ -1,5 +1,5 @@
/*
** $Id: ltm.c,v 1.105 2002/12/04 17:38:31 roberto Exp roberto $
** $Id: ltm.c,v 1.106 2003/04/03 13:35:34 roberto Exp roberto $
** Tag methods
** See Copyright Notice in lua.h
*/
@@ -57,14 +57,17 @@ const TObject *luaT_gettm (Table *events, TMS event, TString *ename) {
const TObject *luaT_gettmbyobj (lua_State *L, const TObject *o, TMS event) {
TString *ename = G(L)->tmname[event];
Table *mt;
switch (ttype(o)) {
case LUA_TTABLE:
return luaH_getstr(hvalue(o)->metatable, ename);
mt = hvalue(o)->metatable;
break;
case LUA_TUSERDATA:
return luaH_getstr(uvalue(o)->uv.metatable, ename);
mt = uvalue(o)->uv.metatable;
break;
default:
return &luaO_nilobject;
mt = NULL;
}
return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : &luaO_nilobject);
}