commit 1a455acc81463489c9e08f037cc71dc61b54935c
parent 60bc151ed70bce0d534edcbbba4380dee4306708
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Mon, 26 Mar 2007 12:56:00 -0300
two small bugs: some metamethods do not accept callable non-function
objects + __concat converts numbers to strings before calling metamethod
Diffstat:
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/lvm.c b/lvm.c
@@ -1,5 +1,5 @@
/*
-** $Id: lvm.c,v 2.69 2006/09/19 14:06:45 roberto Exp roberto $
+** $Id: lvm.c,v 2.70 2007/02/09 13:04:52 roberto Exp roberto $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
@@ -162,7 +162,7 @@ static int call_binTM (lua_State *L, const TValue *p1, const TValue *p2,
const TValue *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */
if (ttisnil(tm))
tm = luaT_gettmbyobj(L, p2, event); /* try second operand */
- if (!ttisfunction(tm)) return 0;
+ if (ttisnil(tm)) return 0;
callTMres(L, res, tm, p1, p2);
return 1;
}
@@ -257,8 +257,7 @@ int luaV_equalval_ (lua_State *L, const TValue *t1, const TValue *t2) {
case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
case LUA_TUSERDATA: {
if (uvalue(t1) == uvalue(t2)) return 1;
- tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable,
- TM_EQ);
+ tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable, TM_EQ);
break; /* will try TM */
}
case LUA_TTABLE: {
@@ -278,12 +277,12 @@ void luaV_concat (lua_State *L, int total, int last) {
do {
StkId top = L->base + last + 1;
int n = 2; /* number of elements handled in this pass (at least 2) */
- if (!tostring(L, top-2) || !tostring(L, top-1)) {
+ if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) {
if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
luaG_concaterror(L, top-2, top-1);
} else if (tsvalue(top-1)->len == 0) { /* second operand is empty? */
- /* do nothing; result is already first operand */ ;
- } else if (tsvalue(top-2)->len == 0) { /* fist operand is empty? */
+ (void)tostring(L, top - 2); /* result is first operand */ ;
+ } else if (ttisstring(top-2) && tsvalue(top-2)->len == 0) {
setsvalue2s(L, top-2, rawtsvalue(top-1)); /* result is second op. */
} else {
/* at least two (non-empty) string values; get as many as possible */