Test PHP 8.1 enum lookalikes in conjunction with Enum::valuesOf() / Enum::valueOf()

Author: thekid

src/main/php/lang/ast/emit/PHP.class.php

@@ -56,7 +56,7 @@ protected function isConstant($result, $node) {
       return (
         $node->member instanceof Literal &&
         is_string($node->type) &&
-        'enum' !== $result->lookup($node->type)->kind()
+        !$result->lookup($node->type)->isEnumCase($node->member->expression)
       );
     } else if ($node instanceof BinaryExpression) {
       return $this->isConstant($result, $node->left) && $this->isConstant($result, $node->right);
@@ -956,7 +956,7 @@ protected function emitScope($result, $scope) {
       $result->out->write(')?'.$t.'::');
       $this->emitOne($result, $scope->member);
       $result->out->write(':null');
-    } else if ($scope->member instanceof Literal && 'enum' === $result->lookup($scope->type)->kind()) {
+    } else if ($scope->member instanceof Literal && $result->lookup($scope->type)->isEnumCase($scope->member->expression)) {
       $result->out->write($scope->type.'::$'.$scope->member->expression);
     } else {
       $result->out->write($scope->type.'::');

src/test/php/lang/ast/unittest/emit/EnumTest.class.php

@@ -50,4 +50,39 @@ public static function run($order= self::ASC) {
 
     Assert::equals('ASC', $t->getMethod('run')->invoke(null));
   }
+
+  #[Test]
+  public function enum_values() {
+    $t= $this->type('use lang\Enum; enum <T> {
+      case Hearts;
+      case Diamonds;
+      case Clubs;
+      case Spades;
+
+      public static function run() {
+        return Enum::valuesOf(self::class);
+      }
+    }');
+
+    Assert::equals(
+      ['Hearts', 'Diamonds', 'Clubs', 'Spades'],
+      array_map(function($suit) { return $suit->name; }, $t->getMethod('run')->invoke(null))
+    );
+  }
+
+  #[Test]
+  public function enum_value() {
+    $t= $this->type('use lang\Enum; enum <T> {
+      case Hearts;
+      case Diamonds;
+      case Clubs;
+      case Spades;
+
+      public static function run() {
+        return Enum::valueOf(self::class, "Hearts")->name;
+      }
+    }');
+
+    Assert::equals('Hearts', $t->getMethod('run')->invoke(null));
+  }
 }