tree c53980f637d1bda50a8510ab7bc0c9971bc6a39c
parent 9f2ba0abac1f445d72edd77d1ca3cb8f121a98b5
author Googler <noreply@google.com> 1574203290 -0800
committer Copybara-Service <copybara-worker@google.com> 1574203488 -0800

bazel syntax: assert validity of results from Java calls

Other than legal Starlark values, the implicit conversion to Starlark
now accepts only null, List, and Map.

- make Attribute.{Computed,LateBound}Default implement StarlarkValue
- move SkylarkType.convertToSkylark to Starlark.fromJava.
- move SkylarkType.isSkylarkAcceptable to Starlark.valid.
- move support for legacy implicit NestedSet conversion to MethodDescriptor.
  I was hoping to delete this but there are still a dozen or so clients to fix.

PiperOrigin-RevId: 281382879