[metaas-dev] Contributing

[Matthew J Tretter]

> All these APIs define separate interfaces for assignments vs. other
> kinds of expression, so it was my intention to do the same.  Then an
> inner class to enumerate the different assignment operator types, per
> ASBinaryExpression.

Sounds good.  Are MUL_ASSSIGN, ADD_ASSIGN, etc good for assignment operator 
constants or are you trying to avoid underscores?

matthew