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Add an "nsEnum" property with the same functionality as "enumValue" for j2objc transated java enums for kotlin compatibility.
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PiperOrigin-RevId: 845739259

Author: stefanhaustein

translator/src/main/java/com/google/devtools/j2objc/translate/EnumRewriter.java

@@ -351,6 +351,13 @@ private void addExtraNativeDecls(EnumDeclaration node) {
                   "- (%s)enumValue {\n" + "  return (%s)[self ordinal];\n" + "}\n\n",
                   nativeName, nativeName)));
 
+      node.addBodyDeclaration(
+          NativeDeclaration.newInnerDeclaration(
+              UnicodeUtils.format("@property(readonly) %s nsEnum%s;", nativeName, segmentName),
+              UnicodeUtils.format(
+                  "- (%s)nsEnum {\n" + "  return (%s)[self ordinal];\n" + "}\n\n",
+                  nativeName, nativeName)));
+
       node.addBodyDeclaration(
           NativeDeclaration.newInnerDeclaration(
               UnicodeUtils.format("+ (%s *)fromNSEnum:(%s)value;\n", typeName, nativeName),
@@ -368,7 +375,7 @@ private void addExtraNativeDecls(EnumDeclaration node) {
       node.addBodyDeclaration(
           NativeDeclaration.newInnerDeclaration(
               UnicodeUtils.format(
-                  "- (%s)ordinal NS_SWIFT_UNAVAILABLE(\"Use .enumValue\")%s;\n",
+                  "- (%s)ordinal NS_SWIFT_UNAVAILABLE(\"Use .nsEnum\")%s;\n",
                   ordinalName, segmentName),
               UnicodeUtils.format(
                   "- (%s)ordinal {\n" + "  return (%s)[super ordinal];\n" + "}\n\n",

translator/src/test/java/com/google/devtools/j2objc/translate/EnumRewriterTest.java

@@ -51,6 +51,10 @@ public void testToNsEnumConversion() throws Exception {
         "- (Test_Enum)toNSEnum {",
         "  return (Test_Enum)[self ordinal];",
         "}");
+    assertTranslatedLines(
+        translation, "- (Test_Enum)nsEnum {",
+        "  return (Test_Enum)[self ordinal];",
+        "}");
     assertTranslatedLines(
         translation,
         "+ (Test *)fromNSEnum:(Test_Enum)nativeValue {",