Remove SourceFile dependency on TermName

Author: nicolasstucki

compiler/src/dotty/tools/dotc/core/Contexts.scala

@@ -239,7 +239,7 @@ object Contexts {
     }
 
     /** Sourcefile with given path name, memoized */
-    def getSource(path: SourceFile.PathName): SourceFile = base.sourceNamed.get(path) match {
+    def getSource(path: TermName): SourceFile = base.sourceNamed.get(path) match {
       case Some(source) =>
         source
       case None =>
@@ -685,7 +685,7 @@ object Contexts {
 
     /** Sources that were loaded */
     val sources: mutable.HashMap[AbstractFile, SourceFile] = new mutable.HashMap[AbstractFile, SourceFile]
-    val sourceNamed: mutable.HashMap[SourceFile.PathName, SourceFile] = new mutable.HashMap[SourceFile.PathName, SourceFile]
+    val sourceNamed: mutable.HashMap[TermName, SourceFile] = new mutable.HashMap[TermName, SourceFile]
 
     // Types state
     /** A table for hash consing unique types */

compiler/src/dotty/tools/dotc/util/SourceFile.scala

@@ -9,10 +9,8 @@ import java.io.IOException
 import scala.internal.Chars._
 import Spans._
 import scala.io.Codec
-import core.Names.TermName
 import core.Contexts.Context
 import scala.annotation.internal.sharable
-import core.Decorators.PreNamedString
 import java.util.concurrent.atomic.AtomicInteger
 import scala.collection.mutable
 
@@ -200,8 +198,6 @@ object SourceFile {
 
   implicit def fromContext(implicit ctx: Context): SourceFile = ctx.source
 
-  type PathName = TermName
-
   def fromId(id: Int): SourceFile = sourceOfChunk(id >> ChunkSizeLog)
 
   def virtual(name: String, content: String) = new SourceFile(new VirtualFile(name, content.getBytes), scala.io.Codec.UTF8)