py/objslice: Ensure slice is not hashable.
As per https://bugs.python.org/issue408326, the slice object should not be hashable. Since MicroPython has an implicit fallback when the unary_op slot is empty, we need to fill this slot. Signed-off-by: David Lechner <david@pybricks.com>
This commit is contained in:
parent
eaccaa3677
commit
8491eb190f
|
@ -46,6 +46,12 @@ STATIC void slice_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t
|
|||
mp_print_str(print, ")");
|
||||
}
|
||||
|
||||
STATIC mp_obj_t slice_unary_op(mp_unary_op_t op, mp_obj_t o_in) {
|
||||
// Needed to explicitly opt out of default __hash__.
|
||||
// REVISIT: CPython implements comparison operators for slice.
|
||||
return MP_OBJ_NULL;
|
||||
}
|
||||
|
||||
#if MICROPY_PY_BUILTINS_SLICE_INDICES
|
||||
STATIC mp_obj_t slice_indices(mp_obj_t self_in, mp_obj_t length_obj) {
|
||||
mp_int_t length = mp_obj_int_get_checked(length_obj);
|
||||
|
@ -104,6 +110,7 @@ MP_DEFINE_CONST_OBJ_TYPE(
|
|||
mp_type_slice,
|
||||
MP_QSTR_slice,
|
||||
MP_TYPE_FLAG_NONE,
|
||||
unary_op, slice_unary_op,
|
||||
SLICE_TYPE_ATTR_OR_LOCALS_DICT
|
||||
print, slice_print
|
||||
);
|
||||
|
|
|
@ -0,0 +1,15 @@
|
|||
|
||||
try:
|
||||
t = [][:]
|
||||
except:
|
||||
print("SKIP")
|
||||
raise SystemExit
|
||||
|
||||
|
||||
# REVISIT: slice comparison operators are not implemented in MicroPython
|
||||
|
||||
# test that slice is not hashable, i.e. it can't be used to copy a dict
|
||||
try:
|
||||
{}[:] = {}
|
||||
except TypeError:
|
||||
print('TypeError')
|
Loading…
Reference in New Issue