diff options
Diffstat (limited to 'src/reflect/scala')
4 files changed, 27 insertions, 6 deletions
diff --git a/src/reflect/scala/reflect/internal/Importers.scala b/src/reflect/scala/reflect/internal/Importers.scala index 86038afaf1..483d0dd656 100644 --- a/src/reflect/scala/reflect/internal/Importers.scala +++ b/src/reflect/scala/reflect/internal/Importers.scala @@ -260,6 +260,8 @@ trait Importers extends api.Importers { to: SymbolTable => newExistentialType(tparams map importSymbol, importType(result)) case from.OverloadedType(pre, alts) => OverloadedType(importType(pre), alts map importSymbol) + case from.ImportType(qual) => + ImportType(importTree(qual)) case from.AntiPolyType(pre, targs) => AntiPolyType(importType(pre), targs map importType) case their: from.TypeVar => diff --git a/src/reflect/scala/reflect/internal/Types.scala b/src/reflect/scala/reflect/internal/Types.scala index 17a52c10e4..9ddaea4c62 100644 --- a/src/reflect/scala/reflect/internal/Types.scala +++ b/src/reflect/scala/reflect/internal/Types.scala @@ -2748,6 +2748,10 @@ trait Types case _ => OverloadedType(pre, alternatives) } + case class ImportType(expr: Tree) extends Type { + override def safeToString = "ImportType("+expr+")" + } + /** A class remembering a type instantiation for some a set of overloaded * polymorphic symbols. * Not used after phase `typer`. diff --git a/src/reflect/scala/reflect/macros/Typers.scala b/src/reflect/scala/reflect/macros/Typers.scala index 54336900f8..87de442921 100644 --- a/src/reflect/scala/reflect/macros/Typers.scala +++ b/src/reflect/scala/reflect/macros/Typers.scala @@ -69,18 +69,32 @@ trait Typers { def inferImplicitView(tree: Tree, from: Type, to: Type, silent: Boolean = true, withMacrosDisabled: Boolean = false, pos: Position = enclosingPosition): Tree /** Recursively resets symbols and types in a given tree. - * - * Note that this does not revert the tree to its pre-typer shape. - * For more info, read up https://issues.scala-lang.org/browse/SI-5464. + * WARNING: Don't use this API, go for [[untypecheck]] instead. */ + @deprecated("Use `c.untypecheck` instead", "2.11.0") def resetAllAttrs(tree: Tree): Tree /** Recursively resets locally defined symbols and types in a given tree. - * - * Note that this does not revert the tree to its pre-typer shape. - * For more info, read up https://issues.scala-lang.org/browse/SI-5464. + * WARNING: Don't use this API, go for [[untypecheck]] instead. */ + @deprecated("Use `c.untypecheck` instead", "2.11.0") def resetLocalAttrs(tree: Tree): Tree + + /** In the current implementation of Scala's reflection API, untyped trees (also known as parser trees or unattributed trees) + * are observationally different from typed trees (also known as typer trees, typechecked trees or attributed trees), + * + * Usually, if some compiler API takes a tree, then both untyped and typed trees will do. However in some cases, + * only untyped or only typed trees are appropriate. For example, [[eval]] only accepts untyped trees and one can only splice + * typed trees inside typed trees. Therefore in the current reflection API, there is a need in functions + * that go back and forth between untyped and typed trees. For this we have [[typecheck]] and `untypecheck`. + * + * Note that `untypecheck` is currently afflicted by https://issues.scala-lang.org/browse/SI-5464, + * which makes it sometimes corrupt trees so that they don't make sense anymore. Unfortunately, there's no workaround for that. + * We plan to fix this issue soon, but for now please keep it in mind. + * + * @see [[http://stackoverflow.com/questions/20936509/scala-macros-what-is-the-difference-between-typed-aka-typechecked-an-untyped]] + */ + def untypecheck(tree: Tree): Tree } /** Indicates an error during one of the methods in [[scala.reflect.macros.Typers]]. diff --git a/src/reflect/scala/reflect/runtime/JavaUniverseForce.scala b/src/reflect/scala/reflect/runtime/JavaUniverseForce.scala index 9224749864..b9b171c7ed 100644 --- a/src/reflect/scala/reflect/runtime/JavaUniverseForce.scala +++ b/src/reflect/scala/reflect/runtime/JavaUniverseForce.scala @@ -170,6 +170,7 @@ trait JavaUniverseForce { self: runtime.JavaUniverse => this.PolyType this.ExistentialType this.OverloadedType + this.ImportType this.AntiPolyType this.HasTypeMember this.ArrayTypeRef |