How can we shift ob_item pointer in Python tuple if it is static array?

Question

I am currently reading the Python 2.7 source code and got stuck with the following piece of code, in tupleobject.h:

PyObject *ob_item[1];

p = ((PyTupleObject *)op)->ob_item + i;

How can we shift pointer by i if ob_item is an array of one PyObject?

duplicate of http://stackoverflow.com/questions/6390331/why-use-array-size-1-instead-of-pointer — fukanchik, Apr 14 '15 at 21:36

score 1 · Answer 1 · edited May 23 '17 at 12:23

1

It's how arrays and pointers can be used interchangeable. So it's equivalent to

p = &((PyTupleObject *)op)->ob_item[i];

Is an array name a pointer? goes a little more into detail.

edited May 23 '17 at 12:23

Community

answered Apr 14 '15 at 22:19

tynn

1 Answers1