scalacode-generationtemplate-haskelltreehugger

Code generation with Scala

When using the SBT toolchain in Scala, is it possible to write a task that will read a special part of the project's source to generate scala-code at compile time.

Any ideas or even articles/tutorials on this? I am looking for something rather similar to Template Haskell.

Solution

  • treehugger.scala is a library designed for code generation.

    import treehugger.forest._
import definitions._
import treehuggerDSL._

val tree: Tree = Predef_println APPLY LIT("Hello, world!")

println(tree)
println(treeToString(tree))

    The above code prints two lines:

    Apply(Ident(println),List(Literal(Constant(Hello, world!))))
println("Hello, world!")

    treehugger does generate an AST, but non-compliant to scalac's AST.