tree 40f4c173d41b35674dfe36a6c29a03df5edf24c5
parent 16156888fca095b6314e217979730df7184f8dbb
author clementbera <clementbera@google.com> 1558596659 +0200
committer Clément Béra <clementbera@google.com> 1558596885 +0000

R8 nest warning and errors

- Tree pruner works with incomplete nest
- Either NestDesugaring or NestReducer raise
  nest warnings and errors.
- Basic version of Nest Reducer added, it is
  an alternative to desugaring for the Cf back-end
  and it tries to remove nests if they do not use
  nest access control.

Bug:132682295
Change-Id: Ib9ac6e1abe4ce513a00ce67fe0b69967bef9ed93