Jacques Pienaar a5827fc91d Add attribute matching and transform to pattern rewrites.
Start simple with single predicate match & transform rules for attributes.
* Its unclear whether modelling Attr predicates will be needed so start with allowing matching attributes with a single predicate.
*  The input and output attr type often differs and so add ability to specify a transform between the input and output format.

PiperOrigin-RevId: 229580879
2019-03-29 15:22:14 -07:00
..
2019-03-29 15:21:59 -07:00
2019-03-29 12:41:43 -07:00