Question

In my quest to generate new code in a Scala compiler plugin, I have now created working classes. The next logical step is to put those classes in a new, non-existing package. In Java, a package is basically a directory name, but in Scala a package seems much more complicated. So far I haven’t found/recognized an example where a compiler plugin creates a new package.

At my current level of understanding, I would think that I would need to create first a package symbol with:

parentPackage.newPackage(...)
// ...

and than later create a Tree for the package with PackageDef. But PackageDef doesn’t take the symbol as parameter, as one would expect, and searching for:

Scala newPackage PackageDef

returned nothing useful. So it seems that I don’t need to do those two steps together. Possibly one is done for my by the compiler, but I don’t know which one. So far, what I have looks like this:

val newPkg = parentPackage.newPackage(NoPosition, newTermName(name))
newPkg.moduleClass.setInfo(new PackageClassInfoType(new Scope,
    newPkg.moduleClass))
newPkg.setInfo(newPkg.moduleClass.tpe)
parentPackage.info.decls.enter(newPkg)
// ...
val newPkgTree = PackageDef(Ident(newPkg.name), List(ClassDef(...)))

Answer 1

I think my answer to your other question should answer this one as well:

How to add a new Class in a Scala Compiler Plugin?