What other languages use the same data model as Python?

[Terry Reedy]

On 5/5/2011 9:19 AM, Neil Cerutti wrote:
> On 2011-05-04, John Nagle<nagle at animats.com>  wrote:
>> That's a quirk of CPython's boxed number implementation.   All
>> integers are boxed, but there's a set of canned objects for
>> small integers.  CPython's range for this is -5 to +256,
>> incidentally.  That's visible through the "is" operator.
>> Arguably, it should not be.
>
> But that's the sole purpose of the is operator. You either expose
> those details, or you don't have an is operator at all.

Which is to say, the CPython testsuite has a CPython-specific 
implementation test that uses 'is' to test that implementation detail.

-- 
Terry Jan Reedy