tree ddfe00a54a701eff0f74af6e84e5b8cefcef1c93
parent ab1711b026f8a4915ee2ef2556b2a7dbff18fa63
author Francois-Rene Rideau <tunes@google.com> 1441394027 +0000
committer Damien Martin-Guillerez <dmarting@google.com> 1441702948 +0000

Refactor Skylark Environment-s

Make Environment-s freezable: Introduce a class Mutability
as a revokable capability to mutate objects in an Environment.
For now, only Environment-s carry this capability.
Make sure that every Mutability is revoked in the same function that creates it,
so no Environment is left open for modification after being created and exported;
exceptions for tests, the shell and initialization contexts.

Unify Environment, SkylarkEnvironment and EvaluationContext into Environment.
Have a notion of Frame for the bindings + parent + mutability.
Replace the updateAndPropagate mechanism by a dynamicFrame.
Simplify ValidationEnvironment, that is now always deduced from the Environment.

--
MOS_MIGRATED_REVID=102363438