This is a first cut at downwards inference. The interaction with InferableLiteral etc isn't well sorted out yet, so while downwards inference on nested expressions works, there will currently be spurious warnings.
BUG=
R=vsm@google.com
Review URL: https://codereview.chromium.org/1038213003
This breaks out casts / coercions into:
Standard (on by default)
- DynamicCasts: dynamic -> T
- AssignmentCasts: T x = expr; // T must be a ground type
Inference (this will go away)
- InferableLiteral
- InferableClosure
- InferableAllocation
Implicit (no flag yet, but i'll add to disable by default)
- DownCastComposite: Any cast to a non-ground type
- DownCastImplicit: Any other implicit downcast not covered above
A flag is also added to enable/disable all wrapping. This is not off by default yet, but that is the intent.
R=leafp@google.com
Review URL: https://codereview.chromium.org/1038583004
Leaf Petersen