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/* Tuple object interface */

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#ifndef Py_TUPLEOBJECT_H

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#define Py_TUPLEOBJECT_H

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#ifdef __cplusplus

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extern "C" {

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#endif

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/*

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Another generally useful object type is a tuple of object pointers.

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For Python, this is an immutable type. C code can change the tuple items

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(but not their number), and even use tuples are general-purpose arrays of

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object references, but in general only brand new tuples should be mutated,

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not ones that might already have been exposed to Python code.

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*** WARNING *** PyTuple_SetItem does not increment the new item's reference

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count, but does decrement the reference count of the item it replaces,

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if not nil. It does *decrement* the reference count if it is *not*

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inserted in the tuple. Similarly, PyTuple_GetItem does not increment the

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returned item's reference count.

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*/

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typedef struct {

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PyObject_VAR_HEAD

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PyObject *ob_item[1];

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/* ob_item contains space for 'ob_size' elements.

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* Items must normally not be NULL, except during construction when

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* the tuple is not yet visible outside the function that builds it.

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*/

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} PyTupleObject;

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PyAPI_DATA(PyTypeObject) PyTuple_Type;

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#define PyTuple_Check(op) \

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PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_TUPLE_SUBCLASS)

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#define PyTuple_CheckExact(op) (Py_TYPE(op) == &PyTuple_Type)

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PyAPI_FUNC(PyObject *) PyTuple_New(Py_ssize_t size);

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PyAPI_FUNC(Py_ssize_t) PyTuple_Size(PyObject *);

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PyAPI_FUNC(PyObject *) PyTuple_GetItem(PyObject *, Py_ssize_t);

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PyAPI_FUNC(int) PyTuple_SetItem(PyObject *, Py_ssize_t, PyObject *);

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PyAPI_FUNC(PyObject *) PyTuple_GetSlice(PyObject *, Py_ssize_t, Py_ssize_t);

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PyAPI_FUNC(int) _PyTuple_Resize(PyObject **, Py_ssize_t);

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PyAPI_FUNC(PyObject *) PyTuple_Pack(Py_ssize_t, ...);

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PyAPI_FUNC(void) _PyTuple_MaybeUntrack(PyObject *);

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/* Macro, trading safety for speed */

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#define PyTuple_GET_ITEM(op, i) (((PyTupleObject *)(op))->ob_item[i])

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#define PyTuple_GET_SIZE(op) Py_SIZE(op)

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/* Macro, *only* to be used to fill in brand new tuples */

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#define PyTuple_SET_ITEM(op, i, v) (((PyTupleObject *)(op))->ob_item[i] = v)

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PyAPI_FUNC(int) PyTuple_ClearFreeList(void);

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PyAPI_FUNC(void) _PyTuple_DebugMallocStats(FILE *out);

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#ifdef __cplusplus

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}

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#endif

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#endif /* !Py_TUPLEOBJECT_H */

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