diff options
Diffstat (limited to 'src/main/scala/scala/async/internal/TransformUtils.scala')
-rw-r--r-- | src/main/scala/scala/async/internal/TransformUtils.scala | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/src/main/scala/scala/async/internal/TransformUtils.scala b/src/main/scala/scala/async/internal/TransformUtils.scala index ed8b103..90419d3 100644 --- a/src/main/scala/scala/async/internal/TransformUtils.scala +++ b/src/main/scala/scala/async/internal/TransformUtils.scala @@ -396,13 +396,18 @@ private[async] trait TransformUtils { * in search of a sub tree that was decorated with the cached answer. */ final def containsAwaitCached(t: Tree): Tree => Boolean = { + def treeCannotContainAwait(t: Tree) = t match { + case _: Ident | _: TypeTree | _: Literal => true + case _ => false + } + def shouldAttach(t: Tree) = !treeCannotContainAwait(t) val symtab = c.universe.asInstanceOf[scala.reflect.internal.SymbolTable] - def attachContainsAwait(t: Tree): Unit = { + def attachContainsAwait(t: Tree): Unit = if (shouldAttach(t)) { val t1 = t.asInstanceOf[symtab.Tree] t1.updateAttachment(ContainsAwait) t1.removeAttachment[NoAwait.type] } - def attachNoAwait(t: Tree): Unit = { + def attachNoAwait(t: Tree): Unit = if (shouldAttach(t)) { val t1 = t.asInstanceOf[symtab.Tree] t1.updateAttachment(NoAwait) } @@ -423,15 +428,16 @@ private[async] trait TransformUtils { markContainsAwaitTraverser.traverse(t) (t: Tree) => { - val symtab = c.universe.asInstanceOf[scala.reflect.internal.SymbolTable] object traverser extends Traverser { var containsAwait = false override def traverse(tree: Tree): Unit = { - if (tree.asInstanceOf[symtab.Tree].hasAttachment[NoAwait.type]) - () - else if (tree.asInstanceOf[symtab.Tree].hasAttachment[ContainsAwait.type]) - containsAwait = true - else super.traverse(tree) + def castTree = tree.asInstanceOf[symtab.Tree] + if (!castTree.hasAttachment[NoAwait.type]) { + if (castTree.hasAttachment[ContainsAwait.type]) + containsAwait = true + else if (!treeCannotContainAwait(t)) + super.traverse(tree) + } } } traverser.traverse(t) @@ -439,6 +445,19 @@ private[async] trait TransformUtils { } } + final def cleanupContainsAwaitAttachments(t: Tree): t.type = { + val symtab = c.universe.asInstanceOf[scala.reflect.internal.SymbolTable] + t.foreach {t => + t.asInstanceOf[symtab.Tree].removeAttachment[ContainsAwait.type] + t.asInstanceOf[symtab.Tree].removeAttachment[NoAwait.type] + } + t + } + + // First modification to translated patterns: + // - Set the type of label jumps to `Unit` + // - Propagate this change to trees known to directly enclose them: + // ``If` / `Block`) adjust types of enclosing final def adjustTypeOfTranslatedPatternMatches(t: Tree, owner: Symbol): Tree = { import definitions.UnitTpe typingTransform(t, owner) { |