Yin-Yang is a library that makes it easy to use and develop deeply embedded DSLs. The DSL users will never see the complex artifacts of the deep embedding while in production they will get all their benefits. The DSL authors write the DSL in plain Scala and Yin-Yang will generate the deep embedding. All that DSL users need to do are the domain-specific optimizations.

DSL Users will never know that the DSL is deeply embedded as they can debug and prototype their code. For example:

vectorDSL {
  Collection(1,2,3) map (_ + 1)
}

DSL Authors will develop their interface in regular Scala:

object Collection {
  def apply[T](els:T*) = ...
}
class Collection[T](elements: Seq[T]) {
	def map[U](f: T => U) = ...
}

And Yin-Yang will generate the nasty Rep[_] types, IR nodes, and cakes.

If you encounter any issues with Yin-Yang please report them here.

If you have any questions about the project please ask them in the development mailing list.

To build Yin-Yang you will need SBT 0.13.x. Just invoke:

sbt package

To use Eclipse invoke:

sbt eclipse

In Eclipse use the Import Wizard to import Existing Projects into Workspace

Note: Eclipse does not support long running macros. The test cases that reify DSLs at compile time will be practically impossible to navigate in Eclipse.

Yin-Yang is licensed under the Scala License.