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Title: Implement `object.__sizeof__` by moreal · Pull Request #3421 · RustPython/RustPython · GitHub

Open Graph Title: Implement `object.__sizeof__` by moreal · Pull Request #3421 · RustPython/RustPython

X Title: Implement `object.__sizeof__` by moreal · Pull Request #3421 · RustPython/RustPython

Description: This pull request may close #356. This pull request implements object.__sizeof__ fully, except for setting all types' ob_size. It introduces PyVarObject.ob_size field and tp_itemsize slot. Also it provides a way to setup itemsize slot with pyclass macro. ob_size field is used to calculate variable object's size with itemsize (ob_size * itemsize + basicsize). Because this pull request modified the core part like (PyInner and PyObjectRef) and I felt the next work can be more bigger, I cut this part and request a review for this pull request. Related codes: CPython object.__sizeof__ impl: https://github.com/python/cpython/blob/e5d8dbdd304935dbd0631ee9605efb501332f792/Objects/typeobject.c#L5520-L5533 CPython PyVarObject: https://github.com/python/cpython/blob/fa2b8b75eb2b8a0193d587e02b488a73579118fc/Include/object.h#L111-L114 The next work will be to call set_ob_size.

Open Graph Description: This pull request may close #356. This pull request implements object.__sizeof__ fully, except for setting all types' ob_size. It introduces PyVarObject.ob_size field and tp_itemsize slot. Also...

X Description: This pull request may close #356. This pull request implements object.__sizeof__ fully, except for setting all types' ob_size. It introduces PyVarObject.ob_size field and tp_itemsize slot. ...

Opengraph URL: https://github.com/RustPython/RustPython/pull/3421

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35655e0 Introduce `SizeOf` trait moreal Jun 13, 2022 https://github.com/RustPython/RustPython/pull/3421/commits/35655e0087d6a07d823af08a0aea3b13d1e47b04
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