Previously, the analyzer would perform downwards and upwards inference
using separate GenericInferrer objects. This meant that any
constraint gathering work performed during downwards inference had to
be repeated during upwards inference.
This change avoids the extra work by using a single GenericInferrer
object for both downwards and upwards inference. It also cleans up
the API for GenericInferrer a bit.
Change-Id: Idc5deed96c18ffc89aeb8ba4e5e95942843dae11
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/236660
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>
Paul Berry
1ffba32609