Serhiy Storchaka added the comment:
Yet one idea that can make the code simpler is make PyLong_FromLong(0) and
PyLong_FromLong(1) never failing. I.e. require NSMALLPOSINTS not less than 2.
> Also consider adding new function PyLong_Increment. This basic operation is
> small pain using the current API. It may also give a small speed benefit.
Smaller pain with using _PyLong_One and Py_SETREF().
Py_SETREF(long_obj, PyNumber_Add(long_obj, _PyLong_One));
Agree that with _PyLong_Increment() it can look better and be faster. But I
don't know whether incrementing by 1 is enough popular operation. I have
counted 5 cases in the stdlib (not counting tests): for enumerate, range and
Counter.
> The problem is to make sure that singletons are created in the right order :-/
Yes, I spent much time for making empty Unicode string singleton always be
initialized. It can be accessed at very early stage.
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<http://bugs.python.org/issue29878>
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