Move files out of the dotty package

- Remove unused classes Pair and Singleton.
- Move classes from dotty.annotation.internal
  to scala.annotation.internal.

The only classes remaining now are in dotty.runtime
and DottyPredef. We should probably do something about them
as well at some point.

8 files changed, 76 insertions, 0 deletions

diff --git a/src/scala/annotation/internal/Alias.scala b/src/scala/annotation/internal/Alias.scala
new file mode 100644
index 000000000..e3f56e70c
--- /dev/null
+++ b/src/scala/annotation/internal/Alias.scala
@@ -0,0 +1,10 @@
+package scala.annotation.internal
+
+import scala.annotation.Annotation
+
+/** An annotation to record a Scala2 pickled alias.
+ *  @param aliased  A TermRef pointing to the aliased field.
+ */
+class Alias(aliased: Any) extends Annotation {
+
+}
diff --git a/src/scala/annotation/internal/AnnotationDefault.scala b/src/scala/annotation/internal/AnnotationDefault.scala
new file mode 100644
index 000000000..5280d091c
--- /dev/null
+++ b/src/scala/annotation/internal/AnnotationDefault.scala
@@ -0,0 +1,8 @@
+package scala.annotation.internal
+
+import scala.annotation.Annotation
+
+/** An annotation to tag Java annotation default values */
+class AnnotationDefault extends Annotation {
+
+}
diff --git a/src/scala/annotation/internal/Body.scala b/src/scala/annotation/internal/Body.scala
new file mode 100644
index 000000000..b6aa0c0fb
--- /dev/null
+++ b/src/scala/annotation/internal/Body.scala
@@ -0,0 +1,8 @@
+package scala.annotation.internal
+
+import scala.annotation.Annotation
+
+/** The class associated with a `BodyAnnotation`, which indicates
+ *  an inline method's right hand side
+ */
+final class Body() extends Annotation
diff --git a/src/scala/annotation/internal/Child.scala b/src/scala/annotation/internal/Child.scala
new file mode 100644
index 000000000..c90871945
--- /dev/null
+++ b/src/scala/annotation/internal/Child.scala
@@ -0,0 +1,16 @@
+package scala.annotation.internal
+
+import scala.annotation.Annotation
+
+/** An annotation to indicate a child class or object of the annotated class.
+ *  E.g. if we have
+ *
+ *    sealed class A
+ *    case class B() extends A
+ *    case class C() extends A
+ *
+ *  Then the class symbol `A` would carry the annotations
+ *  `@Child[Bref] @Child[Cref]` where `Bref`, `Cref` are TypeRefs
+ *  referring to the class symbols of `B` and `C`
+ */
+class Child[T] extends Annotation
diff --git a/src/scala/annotation/internal/InlineParam.scala b/src/scala/annotation/internal/InlineParam.scala
new file mode 100644
index 000000000..0b3649e89
--- /dev/null
+++ b/src/scala/annotation/internal/InlineParam.scala
@@ -0,0 +1,6 @@
+package scala.annotation.internal
+
+import scala.annotation.Annotation
+
+/** An annotation produced by Namer to indicate an inline parameter */
+final class InlineParam() extends Annotation
diff --git a/src/scala/annotation/internal/Repeated.scala b/src/scala/annotation/internal/Repeated.scala
new file mode 100644
index 000000000..75eb3bc25
--- /dev/null
+++ b/src/scala/annotation/internal/Repeated.scala
@@ -0,0 +1,10 @@
+package scala.annotation.internal
+
+import scala.annotation.Annotation
+
+/** An annotation produced by desugaring to indicate that a
+ *  sequence is a repeated parameter. I.e.
+ *
+ *      T*  is expanded by Desugar to    Seq[T] @Repeated
+ */
+final class Repeated() extends Annotation
diff --git a/src/scala/annotation/internal/SourceFile.scala b/src/scala/annotation/internal/SourceFile.scala
new file mode 100644
index 000000000..b203869cf
--- /dev/null
+++ b/src/scala/annotation/internal/SourceFile.scala
@@ -0,0 +1,10 @@
+package scala.annotation.internal
+
+import scala.annotation.Annotation
+
+/** An annotation to record a Scala2 pickled alias.
+ *  @param aliased  A TermRef pointing to the aliased field.
+ */
+class SourceFile(path: String) extends Annotation {
+
+}
diff --git a/src/scala/annotation/internal/UnsafeNonvariant.scala b/src/scala/annotation/internal/UnsafeNonvariant.scala
new file mode 100644
index 000000000..b33df65d6
--- /dev/null
+++ b/src/scala/annotation/internal/UnsafeNonvariant.scala
@@ -0,0 +1,8 @@
+package scala.annotation.internal
+
+import scala.annotation.Annotation
+
+/** This annotation is used as a marker for unsafe
+ *  instantiations in asSeenFrom. See TypeOps.asSeenfrom for an explanation.
+ */
+class UnsafeNonvariant extends Annotation