1#ifndef Py_CPYTHON_TUPLEOBJECT_H
2#  error "this header file must not be included directly"
3#endif
4
5typedef 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
13PyAPI_FUNC(int) _PyTuple_Resize(PyObject **, Py_ssize_t);
14PyAPI_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
22static inline Py_ssize_t PyTuple_GET_SIZE(PyObject *op) {
23    PyTupleObject *tuple = _PyTuple_CAST(op);
24    return Py_SIZE(tuple);
25}
26#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
27#  define PyTuple_GET_SIZE(op) PyTuple_GET_SIZE(_PyObject_CAST(op))
28#endif
29
30#define PyTuple_GET_ITEM(op, index) (_PyTuple_CAST(op)->ob_item[index])
31
32/* Function *only* to be used to fill in brand new tuples */
33static inline void
34PyTuple_SET_ITEM(PyObject *op, Py_ssize_t index, PyObject *value) {
35    PyTupleObject *tuple = _PyTuple_CAST(op);
36    tuple->ob_item[index] = value;
37}
38#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
39#define PyTuple_SET_ITEM(op, index, value) \
40    PyTuple_SET_ITEM(_PyObject_CAST(op), index, _PyObject_CAST(value))
41#endif
42
43PyAPI_FUNC(void) _PyTuple_DebugMallocStats(FILE *out);
44