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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) 2013, 2014 Damien P. George
       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                 :            : #include <assert.h>
      29                 :            : 
      30                 :            : #include "py/obj.h"
      31                 :            : 
      32                 :            : /******************************************************************************/
      33                 :            : /* singleton objects defined by Python                                        */
      34                 :            : 
      35                 :            : typedef struct _mp_obj_singleton_t {
      36                 :            :     mp_obj_base_t base;
      37                 :            :     qstr name;
      38                 :            : } mp_obj_singleton_t;
      39                 :            : 
      40                 :         20 : static void singleton_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
      41                 :         20 :     (void)kind;
      42                 :         20 :     mp_obj_singleton_t *self = MP_OBJ_TO_PTR(self_in);
      43                 :         20 :     mp_printf(print, "%q", self->name);
      44                 :         20 : }
      45                 :            : 
      46                 :            : MP_DEFINE_CONST_OBJ_TYPE(
      47                 :            :     mp_type_singleton, MP_QSTR_, MP_TYPE_FLAG_NONE,
      48                 :            :     print, singleton_print
      49                 :            :     );
      50                 :            : 
      51                 :            : const mp_obj_singleton_t mp_const_ellipsis_obj = {{&mp_type_singleton}, MP_QSTR_Ellipsis};
      52                 :            : #if MICROPY_PY_BUILTINS_NOTIMPLEMENTED
      53                 :            : const mp_obj_singleton_t mp_const_notimplemented_obj = {{&mp_type_singleton}, MP_QSTR_NotImplemented};
      54                 :            : #endif