From 998a5c8e6d6b0613c1e2c1f9f58d657f5332aad1 Mon Sep 17 00:00:00 2001
From: Dmitry Petrashko <dmitry.petrashko@gmail.com>
Date: Thu, 30 Oct 2014 15:50:57 +0100
Subject: readAnnotationContents that should be able to resolve overloaded
 constructors.

---
 src/dotty/tools/dotc/core/pickling/UnPickler.scala | 48 ++++++++++++++++------
 1 file changed, 36 insertions(+), 12 deletions(-)

(limited to 'src')

diff --git a/src/dotty/tools/dotc/core/pickling/UnPickler.scala b/src/dotty/tools/dotc/core/pickling/UnPickler.scala
index 60000441c..627500035 100644
--- a/src/dotty/tools/dotc/core/pickling/UnPickler.scala
+++ b/src/dotty/tools/dotc/core/pickling/UnPickler.scala
@@ -9,8 +9,9 @@ import java.lang.Double.longBitsToDouble
 
 import Contexts._, Symbols._, Types._, Scopes._, SymDenotations._, Names._, NameOps._
 import StdNames._, Denotations._, NameOps._, Flags._, Constants._, Annotations._
+import dotty.tools.dotc.typer.ProtoTypes.{FunProtoTyped, FunProto}
 import util.Positions._
-import ast.Trees, ast.tpd._, ast.untpd
+import dotty.tools.dotc.ast.{tpd, Trees, untpd}, ast.tpd._
 import printing.Texts._
 import printing.Printer
 import io.AbstractFile
@@ -814,19 +815,42 @@ class UnPickler(bytes: Array[Byte], classRoot: ClassDenotation, moduleClassRoot:
    *  readAnnotation, readSymbolAnnotation, or readAnnotInfoArg
    */
   protected def readAnnotationContents(end: Int)(implicit ctx: Context): Tree = {
-    val atp = readTypeRef()
-    val args = new ListBuffer[Tree]
-    while (readIndex != end) {
-      val argref = readNat()
-      args += {
-        if (isNameEntry(argref)) {
-          val name = at(argref, readName)
-          val arg = readClassfileAnnotArg(readNat())
-          NamedArg(name.asTermName, arg)
-        } else readAnnotArg(argref)
+    ctx.atPhase(ctx.typerPhase) { implicit ctx => // needed to enable implicit search
+                                                  // and fix circullar dependency between annotation.currect invoking
+                                                  // elimrepeated that reads the same annotation
+
+      val atp = readTypeRef()
+      val args = {
+        val t = new ListBuffer[Tree]
+
+        while (readIndex != end) {
+          val argref = readNat()
+          t += {
+            if (isNameEntry(argref)) {
+              val name = at(argref, readName)
+              val arg = readClassfileAnnotArg(readNat())
+              NamedArg(name.asTermName, arg)
+            } else readAnnotArg(argref)
+          }
+        }
+        t.toList
       }
+      println(atp)
+      val typer = ctx.typer
+      val proto = new FunProtoTyped(args, atp, typer)
+      val alts = atp.member(nme.CONSTRUCTOR).alternatives.map(_.termRef)
+
+      val constructors = ctx.typer.resolveOverloaded(alts, proto)
+      assert(constructors.size == 1) // this is parsed from bytecode tree. there's nothing user can do about it
+
+      val constr = constructors.head
+      val targs = atp.argTypes
+      val fun = tpd.New(atp withoutArgs targs)
+        .select(TermRef.withSig(atp.normalizedPrefix, constr.termSymbol.asTerm))
+        .appliedToTypes(targs)
+      val apply = untpd.Apply(fun, args)
+      new typer.ApplyToTyped(apply, fun, constr, args, atp).result // needed to handle varargs
     }
-    New(atp, args.toList)
   }
 
   /** Read an annotation and as a side effect store it into
-- 
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