LUA_TLCF
case LUA_TLCF: return cast(void *, cast(size_t, fvalue(o)));
case LUA_TLCF: /* light C function */
#define ttislcf(o) checktag((o), LUA_TLCF)
{ TValue *io=(obj); val_(io).f=(x); settt_(io, LUA_TLCF); }
case LUA_TLCF:
case LUA_TLCF: return fvalue(t1) == fvalue(t2);