SI-4360 Adds prefixes to scaladoc

This was a long-standing issue in scaladoc: It was unable to
disambiguate between entries with the same name. One example is:
immutable.Seq:

trait Seq[+A] extends Iterable[A] with Seq[A] ...

What's that? Seq extends Seq? No, immutable.Seq extends collection.Seq,
but scaladoc was unable to show that. Now it does, depending on the
template you're in. Prefixes are relative and can go back:
-scala.collection.Seq has subclasses *immutable.Seq* and *mutable.Seq*
-scala.immutable.Seq extends *collection.Seq*

Unfortunately the price we pay for this is high, a 20% slowdown in
scaladoc. This is why there is a new flag called -no-prefixes that
disables the prefixes in front of types.

Btw, it also fixes the notorious "booleanValue: This member is added by
an implicit conversion from Boolean to Boolean ...". That's now
java.lang.Boolean, so it becomes clear.

Conflicts:

	src/compiler/scala/tools/nsc/doc/model/diagram/DiagramFactory.scala

1 files changed, 7 insertions, 7 deletions

diff --git a/test/scaladoc/run/SI-3314.scala b/test/scaladoc/run/SI-3314.scala
index 665223098a..3b5c658078 100644
--- a/test/scaladoc/run/SI-3314.scala
+++ b/test/scaladoc/run/SI-3314.scala
@@ -48,15 +48,15 @@ object Test extends ScaladocModelTest {
       val WeekDayInObject = test2._object("WeekDayObject")._member("WeekDay")
 
       val expected = List(
-        ("isWorkingDay1", "Value",   ValueInClass),
-        ("isWorkingDay2", "Value",   ValueInClass),
-        ("isWorkingDay3", "Value",   ValueInTrait),
-        ("isWorkingDay4", "Value",   ValueInTrait),
-        ("isWorkingDay5", "Value",   ValueInObject),
+        ("isWorkingDay1", "WeekDayClass.Value",   ValueInClass),
+        ("isWorkingDay2", "WeekDayClass.Value",   ValueInClass),
+        ("isWorkingDay3", "WeekDayTrait.Value",   ValueInTrait),
+        ("isWorkingDay4", "WeekDayTrait.Value",   ValueInTrait),
+        ("isWorkingDay5", "WeekDayObject.Value",   ValueInObject),
         ("isWorkingDay6", "WeekDay", WeekDayInObject),
-        ("isWorkingDay7", "Value",   ValueInObject),
+        ("isWorkingDay7", "WeekDayObject.Value",   ValueInObject),
         ("isWorkingDay8", "WeekDay", WeekDayInObject),
-        ("isWorkingDay9", "Value",   ValueInObject))
+        ("isWorkingDay9", "WeekDayObject.Value",   ValueInObject))
 
       for ((method, name, ref) <- expected) {
         assert(doc._method(method).valueParams(0)(0).resultType.name == name,