1 /*
2 * This file is part of the MicroPython project, http://micropython.org/
3 *
4 * The MIT License (MIT)
5 *
6 * Copyright (c) 2015 Paul Sokolovsky
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 */
26
27 #include <stdlib.h>
28
29 #include "py/runtime.h"
30
31 // This is universal iterator type which calls "iternext" method stored in
32 // particular object instance. (So, each instance of this time can have its
33 // own iteration behavior.) Having this type saves to define type objects
34 // for various internal iterator objects.
35
36 // Any instance should have these 2 fields at the beginning
37 typedef struct _mp_obj_polymorph_iter_t {
38 mp_obj_base_t base;
39 mp_fun_1_t iternext;
40 } mp_obj_polymorph_iter_t;
41
polymorph_it_iternext(mp_obj_t self_in)42 STATIC mp_obj_t polymorph_it_iternext(mp_obj_t self_in) {
43 mp_obj_polymorph_iter_t *self = MP_OBJ_TO_PTR(self_in);
44 // Redirect call to object instance's iternext method
45 return self->iternext(self_in);
46 }
47
48 const mp_obj_type_t mp_type_polymorph_iter = {
49 { &mp_type_type },
50 .name = MP_QSTR_iterator,
51 .getiter = mp_identity_getiter,
52 .iternext = polymorph_it_iternext,
53 };
54