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* Refactor Skylark Environment-sGravatar Francois-Rene Rideau2015-09-11
| | | | | | | | | | | | | | | | | | | | 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 create... This reinstates a change that previously rolled-back because it broke the serializability of SkylarkLookupValue. Bad news: serializing it succeeds for the wrong reason, because a SkylarkEnvironment was stored as a result (now an Environment.Extension) that was Serializable but inherited its bindings from an Environment (now an Environment.BaseExtension) which wasn't Serializable. Apparently, Java doesn't try to serialize the bindings then (or at least doesn't error out when it fails), because these bindings map variable names to pretty arbitrary objects, and a lot of those we find in practice aren't Serializable. Thus the current code passes the same tests as the previous code, but obviously the serialization is just as ineffective as it used to be. -- MOS_MIGRATED_REVID=102776694
* Rollback of commit 5a94e59f02833f9142bad9203acd72626b089535.Gravatar Janak Ramakrishnan2015-09-08
| | | | | | | | | *** Reason for rollback *** Breaks serialization of SkyValues. -- MOS_MIGRATED_REVID=102457225
* Refactor Skylark Environment-sGravatar Francois-Rene Rideau2015-09-08
| | | | | | | | | | | | | | | | | 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
* Move global objects to RuntimeGravatar Francois-Rene Rideau2015-08-31
Move away global constants and global namespaces out of Environment and into a new file Runtime. -- MOS_MIGRATED_REVID=101940218