Add NamedDefTree.namePos

Author: nicolasstucki

compiler/src/dotty/tools/dotc/ast/Trees.scala

@@ -353,6 +353,12 @@ object Trees {
         }
       }
       else span
+
+    /** The source position of the name defined by this definition.
+     *  This is a point position if the definition is synthetic, or a range position
+     *  if the definition comes from source.
+     */
+    def namePos: SourcePosition = source.atSpan(nameSpan)
   }
 
   /** Tree defines a new symbol and carries modifiers.

compiler/src/dotty/tools/dotc/typer/QuotesAndSplices.scala

@@ -231,7 +231,7 @@ trait QuotesAndSplices {
             cpy.AppliedTypeTree(tree)(transform(tpt), args1)
         case tree: NamedDefTree =>
           if tree.isTerm && !tree.nameSpan.isSynthetic && tree.symbol.name.startsWith("$") then
-            ctx.error("Names cannot start with $ quote pattern", ctx.source.atSpan(tree.nameSpan))
+            ctx.error("Names cannot start with $ quote pattern", tree.namePos)
           super.transform(tree)
         case _ =>
           super.transform(tree)