antlr/antlr4 — pull request #490 by sharwell (2014-03-12 16:33:49+00:00)
Title: Rule versioning artifact

* Implement rule versioning support in a separate Maven artifact
* Add the `RuleDependency` annotation interface for specifying a rule dependency in code, and the `RuleDependencies` annotation interface to allow application of multiple `@RuleDependency` annotations to a single element in code.
* Add the `Dependents` enumeration for specifying complex relational dependencies
* Implement an annotation processor for validating rule dependencies
* Restrict changes in the Tool itself to the minimal code necessary for implementing this feature:
* Add the `RuleVersion` annotation interface
* Add the `-rule-versioning` command line argument to the tool (disabled by default)