if (isTuple) {
List<slice> st;
List<expr> etypes = new ArrayList<expr>();
for (Object o : sltypes) {
if (o instanceof Index) {
Index i = (Index)o;
etypes.add(i.getInternalValue());
} else {
extslice = true;
break;
}
}
if (!extslice) {
expr t = new Tuple(begin, etypes, expr_contextType.Load);
s = new Index(begin, t);
}
} else if (sltypes.size() == 1) {
s = castSlice(sltypes.get(0));
} else if (sltypes.size() != 0) {
extslice = true;