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The C and C++ Include Header Files

/usr/include/python3.12/cpython/tupleobject.h

$ cat -n /usr/include/python3.12/cpython/tupleobject.h

     1	#ifndef Py_CPYTHON_TUPLEOBJECT_H
     2	#  error "this header file must not be included directly"
     3	#endif
     4	
     5	typedef struct {
     6	    PyObject_VAR_HEAD
     7	    /* ob_item contains space for 'ob_size' elements.
     8	       Items must normally not be NULL, except during construction when
     9	       the tuple is not yet visible outside the function that builds it. */
    10	    PyObject *ob_item[1];
    11	} PyTupleObject;
    12	
    13	PyAPI_FUNC(int) _PyTuple_Resize(PyObject **, Py_ssize_t);
    14	PyAPI_FUNC(void) _PyTuple_MaybeUntrack(PyObject *);
    15	
    16	/* Cast argument to PyTupleObject* type. */
    17	#define _PyTuple_CAST(op) \
    18	    (assert(PyTuple_Check(op)), _Py_CAST(PyTupleObject*, (op)))
    19	
    20	// Macros and static inline functions, trading safety for speed
    21	
    22	static inline Py_ssize_t PyTuple_GET_SIZE(PyObject *op) {
    23	    PyTupleObject *tuple = _PyTuple_CAST(op);
    24	    return Py_SIZE(tuple);
    25	}
    26	#define PyTuple_GET_SIZE(op) PyTuple_GET_SIZE(_PyObject_CAST(op))
    27	
    28	#define PyTuple_GET_ITEM(op, index) (_PyTuple_CAST(op)->ob_item[(index)])
    29	
    30	/* Function *only* to be used to fill in brand new tuples */
    31	static inline void
    32	PyTuple_SET_ITEM(PyObject *op, Py_ssize_t index, PyObject *value) {
    33	    PyTupleObject *tuple = _PyTuple_CAST(op);
    34	    tuple->ob_item[index] = value;
    35	}
    36	#define PyTuple_SET_ITEM(op, index, value) \
    37	    PyTuple_SET_ITEM(_PyObject_CAST(op), (index), _PyObject_CAST(value))
    38	
    39	PyAPI_FUNC(void) _PyTuple_DebugMallocStats(FILE *out);
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