• Major cleanup of internal implementation and public APIs. The general structure/usage of the library remains mostly the same, but there are some notable differences in implementation and in the public API:
  • All Parsers classes have been moved into subpackages of com.copperleaf.kudzu.parser to better encapsulate their parsing function/behavior.
  • All Node classes have been moved to the to com.copperleaf.kudzu.node package, each in sub-packages that match the Parser package that produces them.
  • The Visitor API has been rewritten and moved to the com.copperleaf.kudzu.visitor package.
  • The Expression API has been rewritten to greatly reduce the boilerplate needed for implementation. In particular, it no longer evaluates expressions within the Visitor API, but manually implements expression evaluation on its own with a custom ExpressionEvaluator. Operators also manually implement their own evaluation function, instead of having that separated into a separate EvaluableOperator as before. These operators create the operator lookup table, and the whole expression and its operators parse/evaluate on a particular type parameter.
  • Parsers no longer have a name property for themselves. To name a particular node, use the NamedParser to wrap and annotate it.
  • Parsing and Visitation are now implemented using Kotlin's DeepRecursiveFunction utility, which helps avoid StackOverflow errors and gives us more readable stacktraces.
  • Several abstract classes have been converted into interfaces, and several other classes were split into and interface with default, concrete implementations managed internally to the library.