[issue27867] various issues due to misuse of PySlice_GetIndicesEx

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Then there is a design question. I believe that after all we should expose these two new functions publicly. And the question is about function names and the order of arguments. Currently signatures are:

int _PySlice_Unpack(PyObject *r, Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step);
int _PySlice_EvalIndices(Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t step, Py_ssize_t length, Py_ssize_t *slicelength);

Are there suggestions for names? Perhaps the second functions should not have prefix PySlice_, since it doesn't work with slice object.

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