1/* Boolean object interface */
2
3#ifndef Py_BOOLOBJECT_H
4#define Py_BOOLOBJECT_H
5#ifdef __cplusplus
6extern "C" {
7#endif
8
9
10PyAPI_DATA(PyTypeObject) PyBool_Type;
11
12#define PyBool_Check(x) Py_IS_TYPE(x, &PyBool_Type)
13
14/* Py_False and Py_True are the only two bools in existence.
15Don't forget to apply Py_INCREF() when returning either!!! */
16
17/* Don't use these directly */
18PyAPI_DATA(struct _longobject) _Py_FalseStruct;
19PyAPI_DATA(struct _longobject) _Py_TrueStruct;
20
21/* Use these macros */
22#define Py_False ((PyObject *) &_Py_FalseStruct)
23#define Py_True ((PyObject *) &_Py_TrueStruct)
24
25// Test if an object is the True singleton, the same as "x is True" in Python.
26PyAPI_FUNC(int) Py_IsTrue(PyObject *x);
27#define Py_IsTrue(x) Py_Is((x), Py_True)
28
29// Test if an object is the False singleton, the same as "x is False" in Python.
30PyAPI_FUNC(int) Py_IsFalse(PyObject *x);
31#define Py_IsFalse(x) Py_Is((x), Py_False)
32
33/* Macros for returning Py_True or Py_False, respectively */
34#define Py_RETURN_TRUE return Py_NewRef(Py_True)
35#define Py_RETURN_FALSE return Py_NewRef(Py_False)
36
37/* Function to return a bool from a C long */
38PyAPI_FUNC(PyObject *) PyBool_FromLong(long);
39
40#ifdef __cplusplus
41}
42#endif
43#endif /* !Py_BOOLOBJECT_H */
44

source code of include/python3.10/boolobject.h