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The C and C++ Include Header Files

/usr/include/python3.10/internal/pycore_abstract.h


$ cat -n /usr/include/python3.10/internal/pycore_abstract.h

     1	#ifndef Py_INTERNAL_ABSTRACT_H
     2	#define Py_INTERNAL_ABSTRACT_H
     3	#ifdef __cplusplus
     4	extern "C" {
     5	#endif
     6	
     7	#ifndef Py_BUILD_CORE
     8	#  error "this header requires Py_BUILD_CORE define"
     9	#endif
    10	
    11	// Fast inlined version of PyIndex_Check()
    12	static inline int
    13	_PyIndex_Check(PyObject *obj)
    14	{
    15	    PyNumberMethods *tp_as_number = Py_TYPE(obj)->tp_as_number;
    16	    return (tp_as_number != NULL && tp_as_number->nb_index != NULL);
    17	}
    18	
    19	#ifdef __cplusplus
    20	}
    21	#endif
    22	#endif /* !Py_INTERNAL_ABSTRACT_H */