Added a parser.

Synced parser and SyntaxSymmary.
Parser now produces untyped trees that need to be desugared further.
Also some tweaks to position to make it work well.

This is a first version.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/dotty/tools/dotc/parsing/TreeBuilder.scala b/src/dotty/tools/dotc/parsing/TreeBuilder.scala
index 0a008af9d..5caa4c695 100644
--- a/src/dotty/tools/dotc/parsing/TreeBuilder.scala
+++ b/src/dotty/tools/dotc/parsing/TreeBuilder.scala
@@ -10,6 +10,7 @@ import TreeInfo._
 
 /** Methods for building trees, used in the parser.  All the trees
  *  returned by this class must be untyped.
+ *  Note: currently unused, should be refactored into UntypedTrees.
  */
 class TreeBuilder(implicit ctx: Context) {
 
@@ -123,7 +124,7 @@ class TreeBuilder(implicit ctx: Context) {
   }
 
   def stripParens(t: Tree) = t match {
-    case Parens(ts) => makeTuple(ts)(t.pos)
+    case Parens(t) => t
     case _ => t
   }
 
@@ -155,7 +156,7 @@ class TreeBuilder(implicit ctx: Context) {
         case arg => arg
       } else args
     val arguments = right match {
-      case Parens(args) => mkNamed(args)
+      case Parens(arg) => mkNamed(arg :: Nil)
       case _ => right :: Nil
     }
     if (isExpr) {