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generic for (with any number of control variables)

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This commit is contained in:
Roberto Ierusalimschy
2002-03-08 16:10:32 -03:00
parent 4db04555f0
commit bd8b9c94b3
7 changed files with 98 additions and 68 deletions
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15
lvm.c
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@@ -1,5 +1,5 @@
/*
** $Id: lvm.c,v 1.217 2002/03/04 15:40:04 roberto Exp roberto $
** $Id: lvm.c,v 1.218 2002/03/04 21:33:09 roberto Exp roberto $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
@@ -560,24 +560,21 @@ StkId luaV_execute (lua_State *L) {
break;
}
case OP_TFORLOOP: {
int j = GETARG_sBc(i);
int loop = 0;
pc += j; /* jump back before tests (for error messages) */
if (ttype(ra) == LUA_TTABLE) {
Table *t = hvalue(ra);
loop = luaH_next(L, t, ra+1);
if (luaH_next(L, t, ra+1))
pc++; /* skip jump (keep looping) */
}
else if (ttype(ra) == LUA_TFUNCTION) {
setobj(ra+1, ra);
L->top = ra+2; /* no arguments */
luaD_call(L, ra+1, 2);
luaD_call(L, ra+1, GETARG_C(i));
L->top = L->ci->top;
loop = (ttype(ra+1) != LUA_TNIL);
if (ttype(ra+1) != LUA_TNIL)
pc++; /* skip jump (keep looping) */
}
else
luaD_error(L, "`for' generator must be a table or function");
if (!loop)
pc -= j; /* undo jump */
break;
}
case OP_SETLIST: