Elide companion defs to a object extending AnyVal

scala · Aug 24, 2023 · 673d9bc · 673d9bc
1 parent 3783220
commit 673d9bc
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Showing 3 changed files with 6 additions and 1 deletion.
diff --git a/compiler/src/dotty/tools/dotc/ast/Desugar.scala b/compiler/src/dotty/tools/dotc/ast/Desugar.scala
@@ -820,7 +820,7 @@ object desugar {
       }
       else if (companionMembers.nonEmpty || companionDerived.nonEmpty || isEnum)
         companionDefs(anyRef, companionMembers)
-      else if (isValueClass)
+      else if isValueClass && !isObject then
         companionDefs(anyRef, Nil)
       else Nil
 

diff --git a/tests/neg/i18274.check b/tests/neg/i18274.check
@@ -0,0 +1,4 @@
+-- [E078] Syntax Error: tests/neg/i18274.scala:1:7 ---------------------------------------------------------------------
+1 |object Foo extends AnyVal // error
+  |       ^
+  |       Value class needs one val parameter
diff --git a/tests/neg/i18274.scala b/tests/neg/i18274.scala
@@ -0,0 +1 @@
+object Foo extends AnyVal // error