1 files changed, 0 insertions, 101 deletions
diff --git a/src/main/scala/scala/async/ExprBuilder.scala b/src/main/scala/scala/async/ExprBuilder.scala
index 735db76..573af16 100644
--- a/src/main/scala/scala/async/ExprBuilder.scala
+++ b/src/main/scala/scala/async/ExprBuilder.scala
@@ -368,105 +368,4 @@ final class ExprBuilder[C <: Context, FS <: FutureSystem](override val c: C, val
       }
     }
   }
-
-  /**
-   * Analyze the contents of an `async` block in order to:
-   * - Report unsupported `await` calls under nested templates, functions, by-name arguments.
-   * - Find which local `ValDef`-s need to be lifted to fields of the state machine, based
-   * on whether or not they are accessed only from a single state.
-   */
-  def reportUnsupportedAwaits(tree: Tree) {
-    new UnsupportedAwaitAnalyzer().traverse(tree)
-  }
-
-  private class UnsupportedAwaitAnalyzer extends super.AsyncTraverser {
-    override def nestedClass(classDef: ClassDef) {
-      val kind = if (classDef.symbol.asClass.isTrait) "trait" else "class"
-      reportUnsupportedAwait(classDef, s"nested $kind")
-    }
-
-    override def nestedModule(module: ModuleDef) {
-      reportUnsupportedAwait(module, "nested object")
-    }
-
-    override def byNameArgument(arg: Tree) {
-      reportUnsupportedAwait(arg, "by-name argument")
-    }
-
-    override def function(function: Function) {
-      reportUnsupportedAwait(function, "nested function")
-    }
-
-    private def reportUnsupportedAwait(tree: Tree, whyUnsupported: String) {
-      val badAwaits = tree collect {
-        case rt: RefTree if isAwait(rt) => rt
-      }
-      badAwaits foreach {
-        tree =>
-          c.error(tree.pos, s"await must not be used under a $whyUnsupported.")
-      }
-   }
-  }
-
-  /**
-   * Analyze the contents of an `async` block in order to:
-   * - Report unsupported `await` calls under nested templates, functions, by-name arguments.
-   * - Find which local `ValDef`-s need to be lifted to fields of the state machine, based
-   * on whether or not they are accessed only from a single state.
-   */
-  def valDefsUsedInSubsequentStates(tree: Tree): List[ValDef] = {
-    val analyzer = new AsyncDefinitionUseAnalyzer
-    analyzer.traverse(tree)
-    analyzer.valDefsToLift.toList
-  }
-
-  private class AsyncDefinitionUseAnalyzer extends super.AsyncTraverser {
-    private var chunkId = 0
-
-    private def nextChunk() = chunkId += 1
-
-    private var valDefChunkId = Map[Symbol, (ValDef, Int)]()
-
-    val valDefsToLift: mutable.Set[ValDef] = collection.mutable.Set[ValDef]()
-
-    override def traverse(tree: Tree) = {
-      tree match {
-        case If(cond, thenp, elsep) if tree exists isAwait =>
-          traverseChunks(List(cond, thenp, elsep))
-        case Match(selector, cases) if tree exists isAwait =>
-          traverseChunks(selector :: cases)
-        case Apply(fun, args) if isAwait(fun)              =>
-          super.traverse(tree)
-          nextChunk()
-        case vd: ValDef                                    =>
-          super.traverse(tree)
-          valDefChunkId += (vd.symbol ->(vd, chunkId))
-          if (isAwait(vd.rhs)) valDefsToLift += vd
-        case as: Assign                                    =>
-          if (isAwait(as.rhs)) {
-            // TODO test the orElse case, try to remove the restriction.
-            if (as.symbol != null) {
-              // synthetic added by the ANF transfor
-              val (vd, defBlockId) = valDefChunkId.getOrElse(as.symbol, c.abort(as.pos, "await may only be assigned to a var/val defined in the async block. " + as.symbol))
-              valDefsToLift += vd
-            }
-          }
-          super.traverse(tree)
-        case rt: RefTree                                   =>
-          valDefChunkId.get(rt.symbol) match {
-            case Some((vd, defChunkId)) if defChunkId != chunkId =>
-              valDefsToLift += vd
-            case _                                               =>
-          }
-          super.traverse(tree)
-        case _                                             => super.traverse(tree)
-      }
-    }
-
-    private def traverseChunks(trees: List[Tree]) {
-      trees.foreach {
-        t => traverse(t); nextChunk()
-      }
-    }
-  }
 }