Merge pull request #104 from DarkDimius/lazy-vals-obj

Test that lazy val doesn't rewrite module  definitions.

Author: DarkDimius

src/dotty/tools/dotc/ast/tpd.scala

@@ -272,7 +272,7 @@ object tpd extends Trees.Instance[Type] with TypedTreeInfo {
    *
    *  gets expanded to
    *
-   *     <module> lazy val obj = new obj$
+   *     <module> val obj = new obj$
    *     <module> class obj$ extends parents { this: obj.type => decls }
    *
    *  (The following no longer applies:

test/test/transform/LazyValsTest.scala

@@ -6,6 +6,15 @@ import org.junit.Assert
 
 class LazyValsTest extends DottyTest {
 
+    @Test
+    def doNotRewriteObjects = {
+      checkCompile("LazyVals", "object O"){ (tree, ctx) =>
+        Assert.assertTrue("local lazy shouldn't rewrite module instance definitions", tree.toString.contains(
+          "ValDef(Modifiers(final module <stable>,,List()),O,Ident(O$),Apply(Select(New(Ident(O$)),<init>),List()))"
+        ))
+      }
+    }
+
     @Test
     def localInt = {
       checkCompile("LazyVals", "class LocalLV { def m = { lazy val s = 1;  s }}"){ (tree, ctx) =>