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| 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/nlr.h" |
| 30 | +#include "py/runtime.h" |
| 31 | + |
| 32 | +// This is universal iterator type which calls "iternext" method stored in |
| 33 | +// particular object instance. (So, each instance of this time can have its |
| 34 | +// own iteration behavior.) Having this type saves to define type objects |
| 35 | +// for various internal iterator objects. |
| 36 | + |
| 37 | +// Any instance should have these 2 fields at the beginning |
| 38 | +typedef struct _mp_obj_polymorph_iter_t { |
| 39 | + mp_obj_base_t base; |
| 40 | + mp_fun_1_t iternext; |
| 41 | +} mp_obj_polymorph_iter_t; |
| 42 | + |
| 43 | +STATIC mp_obj_t polymorph_it_iternext(mp_obj_t self_in) { |
| 44 | + mp_obj_polymorph_iter_t *self = MP_OBJ_TO_PTR(self_in); |
| 45 | + // Redirect call to object instance's iternext method |
| 46 | + return self->iternext(self_in); |
| 47 | +} |
| 48 | + |
| 49 | +const mp_obj_type_t mp_type_polymorph_iter = { |
| 50 | + { &mp_type_type }, |
| 51 | + .name = MP_QSTR_iterator, |
| 52 | + .getiter = mp_identity, |
| 53 | + .iternext = polymorph_it_iternext, |
| 54 | +}; |
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