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rt_unpack_sequence(): Support generic iterables.

This commit is contained in:
Paul Sokolovsky 2014-02-02 00:54:06 +02:00
parent 48697f1dd2
commit edbdf71f5c
1 changed files with 21 additions and 5 deletions
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26
py/runtime.c
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@ -769,8 +769,8 @@ mp_obj_t rt_store_set(mp_obj_t set, mp_obj_t item) {
// unpacked items are stored in reverse order into the array pointed to by items
void rt_unpack_sequence(mp_obj_t seq_in, uint num, mp_obj_t *items) {
uint seq_len;
if (MP_OBJ_IS_TYPE(seq_in, &tuple_type) || MP_OBJ_IS_TYPE(seq_in, &list_type)) {
uint seq_len;
mp_obj_t *seq_items;
if (MP_OBJ_IS_TYPE(seq_in, &tuple_type)) {
mp_obj_tuple_get(seq_in, &seq_len, &seq_items);
@ -778,17 +778,33 @@ void rt_unpack_sequence(mp_obj_t seq_in, uint num, mp_obj_t *items) {
mp_obj_list_get(seq_in, &seq_len, &seq_items);
}
if (seq_len < num) {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_ValueError, "need more than %d values to unpack", (void*)(machine_uint_t)seq_len));
goto too_short;
} else if (seq_len > num) {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_ValueError, "too many values to unpack (expected %d)", (void*)(machine_uint_t)num));
goto too_long;
}
for (uint i = 0; i < num; i++) {
items[i] = seq_items[num - 1 - i];
}
} else {
// TODO call rt_getiter and extract via rt_iternext
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError, "'%s' object is not iterable", mp_obj_get_type_str(seq_in)));
mp_obj_t iterable = rt_getiter(seq_in);
for (seq_len = 0; seq_len < num; seq_len++) {
mp_obj_t el = rt_iternext(iterable);
if (el == mp_const_stop_iteration) {
goto too_short;
}
items[num - 1 - seq_len] = el;
}
if (rt_iternext(iterable) != mp_const_stop_iteration) {
goto too_long;
}
}
return;
too_short:
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_ValueError, "need more than %d values to unpack", seq_len));
too_long:
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_ValueError, "too many values to unpack (expected %d)", num));
}
mp_obj_t rt_build_map(int n_args) {