Support for INTERSECT?

Hi, is it possible to add support for intersect? eg:

 rule_engine.Rule('role INTERSECT {"R1", "R2"}').matches({"role": ["R1"]})

[zeroSteiner]

Alright this is done in the v3.1.0 release which is now on PyPi. You can use the new SET data type along with the bitwise and operator &. For example:

python -m rule_engine.debug_repl
rule > {"R1", "R2", "R3"} & {"R3", "R4"}
result: 
{'R3'}
rule > 'Testing'.to_set & {'a', 'e', 'i', 'o', 'u'}
result: 
{'e', 'i'}
rule > 

Both the ARRAY and STRING data types have a to_set attribute that will convert them as well.

[zeroSteiner]

I’ve started the work for a SET data type which would support the bitwise operators and, or and xor (&, |, and ^ respectively). Usage of the bitwise and operator will have the desired effect of checking for the intersection of two SETs just like it does in Python. There will be accompanying attributes for converting arrays and strings into sets. This will be in the 3.1 release (probably) in the next couple of weeks. A preview is available in the feat/v3.1 branch.

I’d still like to have array comprehension support, but that can come later. These two features don’t seem like they need to be mutually exclusive and a SET data type will solve the problem at hand more directly.