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py/sequence: Allow to use bignums as indices in slice objects. 

See issue #2264.
This commit is contained in:
Damien George 2016-08-15 23:26:34 +10:00
parent f6a8e84a25
commit 095e43a9a5
2 changed files with 8 additions and 3 deletions
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6
py/sequence.c
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@ -56,12 +56,12 @@ bool mp_seq_get_fast_slice_indexes(mp_uint_t len, mp_obj_t slice, mp_bound_slice
if (ostart == mp_const_none) {
start = 0;
} else {
start = MP_OBJ_SMALL_INT_VALUE(ostart);
start = mp_obj_get_int(ostart);
}
if (ostop == mp_const_none) {
stop = len;
} else {
stop = MP_OBJ_SMALL_INT_VALUE(ostop);
stop = mp_obj_get_int(ostop);
}
// Unlike subscription, out-of-bounds slice indexes are never error
@ -88,7 +88,7 @@ bool mp_seq_get_fast_slice_indexes(mp_uint_t len, mp_obj_t slice, mp_bound_slice
indexes->stop = stop;
if (ostep != mp_const_none && ostep != MP_OBJ_NEW_SMALL_INT(1)) {
indexes->step = MP_OBJ_SMALL_INT_VALUE(ostep);
indexes->step = mp_obj_get_int(ostep);
return false;
}
indexes->step = 1;

5
tests/basics/slice_bignum.py Normal file
View File

@ -0,0 +1,5 @@
# test slicing when arguments are bignums
print(list(range(10))[(1<<66)>>65:])
print(list(range(10))[:(1<<66)>>65])
print(list(range(10))[::(1<<66)>>65])