Repository: scalacenter/tasty-query (scala)

Issue:
enable companion lookup methods for non static classes
currently you can only lookup the companion object of a class if the class owner is a package

Pull request description:
fixes #184

Patch:
diff --git a/tasty-query/shared/src/main/scala/tastyquery/Symbols.scala b/tasty-query/shared/src/main/scala/tastyquery/Symbols.scala
index b7f15299..721a84cb 100644
--- a/tasty-query/shared/src/main/scala/tastyquery/Symbols.scala
+++ b/tasty-query/shared/src/main/scala/tastyquery/Symbols.scala
@@ -510,7 +510,7 @@ object Symbols {
       * - for `object class C[$]` => `class C`
       */
     final def companionClass(using Context): Option[ClassSymbol] = maybeOuter match
-      case scope: PackageSymbol =>
+      case scope: DeclaringSymbol =>
         scope.getDecl(this.name.companionName).collect { case sym: ClassSymbol =>
           sym
         }


Test patch:
diff --git a/tasty-query/shared/src/test/scala/tastyquery/Paths.scala b/tasty-query/shared/src/test/scala/tastyquery/Paths.scala
index 8cc44b91..048b8a66 100644
--- a/tasty-query/shared/src/test/scala/tastyquery/Paths.scala
+++ b/tasty-query/shared/src/test/scala/tastyquery/Paths.scala
@@ -66,6 +66,7 @@ object Paths:
     }
     def show: String = path.mkString(".")
     def debug: String = toDebugString(path)
+    def asObj: DeclarationPath = path.convertAsObject
 
   extension [T <: DeclarationPath](path: T)
     private def convertAsObject: T =
diff --git a/tasty-query/shared/src/test/scala/tastyquery/TypeSuite.scala b/tasty-query/shared/src/test/scala/tastyquery/TypeSuite.scala
index 6e5edef8..722728c9 100644
--- a/tasty-query/shared/src/test/scala/tastyquery/TypeSuite.scala
+++ b/tasty-query/shared/src/test/scala/tastyquery/TypeSuite.scala
@@ -1256,4 +1256,25 @@ class TypeSuite extends UnrestrictedUnpicklingSuite {
     assert(clue(childToString.allOverriddenSymbols.toList) == List(superToString, objectToString))
     assert(clue(childToString.nextOverriddenSymbol) == Some(superToString))
   }
+
+  def companionClassFullCycle(path: DeclarationPath)(using Context, munit.Location): Unit = {
+    val cls: ClassSymbol = resolve(path).asClass
+    val moduleClass: ClassSymbol = resolve(path.asObj).asClass
+
+    assert(cls == moduleClass.companionClass.get)
+    assert(moduleClass.companionClass.get == cls)
+  }
+
+  testWithContext("companion-tests-module-value") {
+    companionClassFullCycle(name"companions" / tname"CompanionObject")
+  }
+
+  testWithContext("companion-tests-nested-module-value") {
+    companionClassFullCycle(name"companions" / tname"CompanionObject" / obj / tname"NestedObject")
+  }
+
+  testWithContext("companion-tests-class-nested-module-value") {
+    companionClassFullCycle(name"companions" / tname"CompanionObject" / tname"ClassNestedObject")
+  }
+
 }
diff --git a/test-sources/src/main/scala/companions/CompanionObject.scala b/test-sources/src/main/scala/companions/CompanionObject.scala
new file mode 100644
index 00000000..a2b4d2d6
--- /dev/null
+++ b/test-sources/src/main/scala/companions/CompanionObject.scala
@@ -0,0 +1,10 @@
+package companions
+
+class CompanionObject {
+  class ClassNestedObject
+  object ClassNestedObject
+}
+object CompanionObject {
+  class NestedObject
+  object NestedObject
+}