voc Complete implementation of operations on standard types

Java has a specific set of allowed operator and operations. Python has a set of operators and operations as well. However, the two don't match exactly. For example, Java will allow any object to be added to a java.lang.String; Python does not. On the other hand, Python allows multiplication of str by int (producing a duplicated string); Java does not.

In order to replicate Python behavior in Java, Python's logic for all the basic operations needs to be implemented in the VOC Java support library.

The test suite contains around 2800 tests in the that are currently marked as "expected failures". These reflect an attempt to do "every operation between every base data type". The task: pick a data type, and write the implementation of one of the dunder operation (e.g., __add__ or __xor__) or comparison (__lt__ or __eq__) methods.

The tests will pass (and become unexpected successes) when the output of Python code doing that operation is the same when run through CPython and VOC - and I mean byte-identical, down to the text and punctuation of the error message if appropriate.

If you want to see an example of what is involved, check out the implementation of add for integers. If you have an int, Python will allows you to add an int or a float to it; all other types raise a TypeError. The list of operations on int that still need to be implemented can be found here; if you add a new operation, delete the line that corresponds to that test, and the test will report as a pass, rather than an expected fail.

Dec 04 '15 22:12 freakboy3742

When you submit a PR for this, prefix the PR message with "Refs #36", so it will be associated with this ticket.

Dec 04 '15 22:12 freakboy3742

Folks, I'm picking up the test_unary_positive test in tests/test_str.py. Please don't work on it so that we can avoid collisions! :smile:

Feb 02 '16 15:02 ankush981

I forgot to mention, I'll be doing all the unary operator tests for String. Please stay away -- they're mine! :stuck_out_tongue_closed_eyes:

Feb 06 '16 16:02 ankush981

Hello, people. I'll be picking up the following tests for string types:

'test_eq_bytearray',
'test_eq_bytes',
'test_eq_class',
'test_eq_complex',
'test_eq_frozenset',

Feb 07 '16 13:02 ankush981

I'm working through the Int class' unary and binary operations.

Mar 11 '16 12:03 cflee

Hi! I'm working on the data type Boolean, starting with comparison methods.

Mar 18 '16 09:03 mzwaen

I'm working through the List class

Mar 21 '16 14:03 khoobks

I'm working through the Tuple class

Mar 25 '16 06:03 khoobks

Hello, I'll be picking up the byte class.

Mar 27 '16 09:03 prachi2396

Hello I am working on Int class (power and xor)

Apr 04 '16 08:04 elitalobo

I'm working on next builtin.

Jun 01 '16 21:06 ericatkin

~~I'm going to work on multiplying some data structures (test_multiply_*), starting with str, float, and list~~

Instead working on fleshing out the Set class with operations and compator errors

Jun 02 '16 17:06 katlings

I'm attempting InplaceStrOperationTests 'test_add_int'

Jun 02 '16 19:06 julisi

I'm now attempting BinaryStrOperationTests 'test_subscr_class' SCRATCH that -- having issues and terminating for now. Please feel free to fix this class if you wish.

Jun 03 '16 16:06 julisi

Please reserve float for me until Sunday, June 5th.

Jun 03 '16 23:06 encukou

All my background in integer binary calculations is stale. It seems like the int / shift functions might be a good place to start, but are there handy docs online with the specs for binary math done by java? ty! Anne via PyGotham curiosity about PyBee coins and great lecture on Python for Android/iOS.

Jul 17 '16 10:07 AnneTheAgile

@AnneTheAgile Most of the operations for int have been implemented, except for those related to types that aren't fully defined (complex, bytearray, etc). There's a couple missing (or buggy) for floor divide, true divide and inline multiplication.

You can see the operations that are "missing" by looking at a test file (like ( https://github.com/pybee/voc/blob/master/tests/datatypes/test_int.py)[this one]) - any entry in the "not_implemented" section indicates an operator that isn't implemented (or isn't correctly implemented) for a given data type pair.

If you find me at the conference, I'm happy to give you some in-person pointers. I might even give you a coin in advance, if you promise you'll keep going until you get a commit :-)

Jul 17 '16 13:07 freakboy3742

Going to try the str inline right shift operator