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py/objslice: Make slice attributes (start/stop/step) readable.

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Configurable with MICROPY_PY_BUILTINS_SLICE_ATTRS.  Disabled by default.
This commit is contained in:
Tom Soulanille
2015-09-11 14:31:32 -07:00
committed by Damien George
parent d80174d7c3
commit aeb62f9ae3
5 changed files with 44 additions and 0 deletions
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20
py/objslice.c
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@@ -57,10 +57,30 @@ STATIC void slice_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t
mp_print_str(print, ")");
}
#if MICROPY_PY_BUILTINS_SLICE_ATTRS
STATIC void slice_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
if (dest[0] != MP_OBJ_NULL) {
// not load attribute
return;
}
mp_obj_slice_t *self = self_in;
if (attr == MP_QSTR_start) {
dest[0] = self->start;
} else if (attr == MP_QSTR_stop) {
dest[0] = self->stop;
} else if (attr == MP_QSTR_step) {
dest[0] = self->step;
}
}
#endif
const mp_obj_type_t mp_type_slice = {
{ &mp_type_type },
.name = MP_QSTR_slice,
.print = slice_print,
#if MICROPY_PY_BUILTINS_SLICE_ATTRS
.attr = slice_attr,
#endif
};
mp_obj_t mp_obj_new_slice(mp_obj_t ostart, mp_obj_t ostop, mp_obj_t ostep) {