Split up forge into `scalaplugin` an `core` subprojects, to allow us to use the `T#apply` macro in the implementation of `scalaplugin.Subproject`

Also needed to implement inter-`Subproject` dependencies so the `MetacircularTests` can continue to support the new layout

1 files changed, 57 insertions, 0 deletions

diff --git a/core/src/main/scala/forge/Discovered.scala b/core/src/main/scala/forge/Discovered.scala
new file mode 100644
index 00000000..03577b1f
--- /dev/null
+++ b/core/src/main/scala/forge/Discovered.scala
@@ -0,0 +1,57 @@
+package forge
+
+import forge.util.Labelled
+import play.api.libs.json.Format
+
+import language.experimental.macros
+import reflect.macros.blackbox.Context
+
+class Discovered[T](val value: Seq[(Seq[String], Format[_], T => Target[_])]){
+  def apply(t: T) = value.map{case (a, f, b) => (a, f, b(t)) }
+
+}
+object Discovered {
+  def makeTuple[T, V](path: Seq[String], func: T => Target[V])(implicit f: Format[V]) = {
+    (path, f, func)
+  }
+
+
+  def mapping[T: Discovered](t: T): Map[Target[_], Labelled[_]] = {
+    implicitly[Discovered[T]].apply(t)
+      .map(x => x._3 -> Labelled(x._3.asInstanceOf[Target[Any]], x._2.asInstanceOf[Format[Any]], x._1))
+      .toMap
+  }
+
+  implicit def apply[T]: Discovered[T] = macro applyImpl[T]
+
+  def applyImpl[T: c.WeakTypeTag](c: Context): c.Expr[Discovered[T]] = {
+    import c.universe._
+    val tpe = c.weakTypeTag[T].tpe
+    def rec(segments: List[String], t: c.Type): Seq[Seq[String]] = for {
+      m <- t.members.toSeq
+      if m.isTerm && (m.asTerm.isGetter || m.asTerm.isLazy) || m.isModule
+      res <- {
+        val extendedSegments = m.name.toString :: segments
+        val self =
+          if (m.typeSignature.resultType <:< c.weakTypeOf[Target[_]]) Seq(extendedSegments)
+          else Nil
+        val children = rec(extendedSegments, m.typeSignature)
+        self ++ children
+      }
+    } yield res
+
+    val reversedPaths = rec(Nil, tpe)
+
+    val result = for(reversedPath <- reversedPaths.toList) yield {
+      val base = q"${TermName(c.freshName())}"
+      val segments = reversedPath.reverse.toList
+      val ident = segments.foldLeft[Tree](base)((prefix, name) =>
+        q"$prefix.${TermName(name)}"
+      )
+
+      q"forge.Discovered.makeTuple($segments, ($base: $tpe) => $ident)"
+    }
+
+    c.Expr[Discovered[T]](q"new _root_.forge.Discovered($result)")
+  }
+}