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#ifndef Py_CPYTHON_LISTOBJECT_H
# error "this header file must not be included directly"
#endif
typedef struct {
PyObject_VAR_HEAD
/* Vector of pointers to list elements. list[0] is ob_item[0], etc. */
PyObject **ob_item;
/* ob_item contains space for 'allocated' elements. The number
* currently in use is ob_size.
* Invariants:
* 0 <= ob_size <= allocated
* len(list) == ob_size
* ob_item == NULL implies ob_size == allocated == 0
* list.sort() temporarily sets allocated to -1 to detect mutations.
*
* Items must normally not be NULL, except during construction when
* the list is not yet visible outside the function that builds it.
*/
Py_ssize_t allocated;
} PyListObject;
PyAPI_FUNC(PyObject *) _PyList_Extend(PyListObject *, PyObject *);
PyAPI_FUNC(void) _PyList_DebugMallocStats(FILE *out);
/* Macro, trading safety for speed */
/* Cast argument to PyListObject* type. */
#define _PyList_CAST(op) (assert(PyList_Check(op)), (PyListObject *)(op))
#define PyList_GET_ITEM(op, i) (_PyList_CAST(op)->ob_item[i])
#define PyList_SET_ITEM(op, i, v) ((void)(_PyList_CAST(op)->ob_item[i] = (v)))
#define PyList_GET_SIZE(op) Py_SIZE(_PyList_CAST(op))
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