From 9e408acecf11a6ca39aeeca059dace44f9739c5e Mon Sep 17 00:00:00 2001
From: Vlasta Neubauer <cz.paranoiq@gmail.com>
Date: Sat, 28 Aug 2021 13:57:08 +0200
Subject: [PATCH] Abstract classes in Enum inheritance hierarchy are skipped

---
 src/Enum/EnumSetMixin.php |  5 +++++
 tests/src/Enum/Enum.phpt  | 22 +++++++++++++++++++---
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/src/Enum/EnumSetMixin.php b/src/Enum/EnumSetMixin.php
index a9603bef..2aee1694 100644
--- a/src/Enum/EnumSetMixin.php
+++ b/src/Enum/EnumSetMixin.php
@@ -97,6 +97,11 @@ final protected static function init(string $class): void
         /** @var ReflectionClass<Enum|Set> $parent */
         $parent = $ref->getParentClass();
         $parentClass = $parent->getName();
+        if (!in_array($parentClass, [IntEnum::class, StringEnum::class, IntSet::class, StringSet::class], true) && $parent->isAbstract()) {
+            /** @var ReflectionClass<Enum|Set> $parent */
+            $parent = $parent->getParentClass();
+            $parentClass = $parent->getName();
+        }
         $isDescendant = !in_array($parentClass, $rootClasses, true);
 
         $parentValues = [];
diff --git a/tests/src/Enum/Enum.phpt b/tests/src/Enum/Enum.phpt
index 9e2ee987..202569d0 100644
--- a/tests/src/Enum/Enum.phpt
+++ b/tests/src/Enum/Enum.phpt
@@ -54,6 +54,20 @@ class E extends IntEnum
 
 }
 
+// skip abstract
+abstract class F extends IntEnum
+{
+
+}
+
+class G extends F
+{
+
+    public const ONE = 1;
+    public const TWO = 2;
+
+}
+
 $aOne = A::get(1);
 $aOne2 = A::get(1);
 $aTwo = A::get(2);
@@ -63,12 +77,14 @@ $abOne = AB::get(1);
 $abcOne = ABC::get(1);
 $abcTwo = ABC::get(2);
 $abdOne = ABD::get(1);
-$fOne = E::get(1);
+$eOne = E::get(1);
+$gOne = G::get(1);
 
 
 get:
 Assert::type($aOne, A::class);
 Assert::equal($aOne, $aOne2);
+Assert::equal($gOne, G::get(1));
 
 
 getValue:
@@ -80,8 +96,8 @@ Assert::same($aOne->getConstantName(), 'ONE');
 
 
 equals:
-Assert::exception(static function () use ($aOne, $fOne): void {
-    $aOne->equals($fOne);
+Assert::exception(static function () use ($aOne, $eOne): void {
+    $aOne->equals($eOne);
 }, InvalidTypeException::class);
 Assert::false($aOne->equals($aTwo));
 Assert::true($aOne->equals($aOne2));