Method getAdjTupleIndex

source/python.js:17851–17861

(loc, tuple_type, input_index, allow_out_of_bounds)

                }
            }
            getAdjTupleIndex(loc, tuple_type, input_index, allow_out_of_bounds) {
                let adj_index = input_index;
                const tuple_len = tuple_type.elements().length;
                if (input_index < 0) {
                    adj_index = tuple_len + input_index;
                }
                if (!allow_out_of_bounds && (adj_index >= tuple_len || adj_index < 0)) {
                    throw new python.Error(`Tuple index out of range at ${loc}.`);
                }
                return adj_index;
            }
            emitTupleIndex(loc, tuple_val, idx_val) {
                const tuple_typ = tuple_val.type();
                const elems = tuple_typ.elements();