New enum syntax: Short constructor syntax introduced for entries, optional commas between entries, semicolon after entries. #KT-7605 Fixed.

Grammar changed accordingly.
Semicolons prohibited after an entry except the last one.
Only one initializer is allowed per entry.
EnumReferenceExpression AST node introduced.
Some tests fixed, a pair of new tests written. Kotlin code inside project fixed.
Formatter and intendation tests fixed accordingly.
Stub version is incremented.

idea/testData/formatter/DelegationList.after.inv.kt

@@ -27,14 +27,9 @@ open class C1
 open class C2
 
 enum class Test : A1 {
-    FIRST_ITEM : Test(), C1(),
-            C2()
+    FIRST_ITEM : Test()
     SECOND_ITEM :
             Test()
-
-    THIRD_ITEM : Test(),
-            C1()
-    FORTH_ITEM : Test()
 }
 
 // SET_TRUE: ALIGN_MULTILINE_EXTENDS_LIST

idea/testData/formatter/DelegationList.after.kt

@@ -27,14 +27,9 @@ open class C1
 open class C2
 
 enum class Test : A1 {
-    FIRST_ITEM : Test(), C1(),
-                 C2()
+    FIRST_ITEM : Test()
     SECOND_ITEM :
             Test()
-
-    THIRD_ITEM : Test(),
-                 C1()
-    FORTH_ITEM : Test()
 }
 
 // SET_TRUE: ALIGN_MULTILINE_EXTENDS_LIST

idea/testData/formatter/DelegationList.kt

@@ -27,13 +27,9 @@ open class C1
 open class C2
 
 enum class Test : A1 {
-    FIRST_ITEM : Test(), C1(),
-    C2()
+    FIRST_ITEM : Test()
     SECOND_ITEM :
     Test()
-
-    THIRD_ITEM : Test(),
-    C1() FORTH_ITEM : Test()
 }
 
 // SET_TRUE: ALIGN_MULTILINE_EXTENDS_LIST

idea/testData/indentationOnNewline/InEnumAfterSemicolon.after.inv.kt

@@ -0,0 +1,6 @@
+// SET_TRUE: ALIGN_MULTILINE_EXTENDS_LIST
+
+enum class EnumTest {
+    ENTRY: EnumTest(); 
+    <caret>
+}

idea/testData/indentationOnNewline/InEnumAfterSemicolon.after.kt

@@ -0,0 +1,6 @@
+// SET_TRUE: ALIGN_MULTILINE_EXTENDS_LIST
+
+enum class EnumTest {
+    ENTRY: EnumTest(); 
+    <caret>
+}

idea/testData/indentationOnNewline/InEnumAfterSemicolon.kt

@@ -0,0 +1,5 @@
+// SET_TRUE: ALIGN_MULTILINE_EXTENDS_LIST
+
+enum class EnumTest {
+    ENTRY: EnumTest(); <caret>
+}

idea/testData/indentationOnNewline/InEnumInitializerListAfterComma.after.inv.kt

@@ -4,5 +4,5 @@ interface A1
 
 enum class EnumTest {
     ENTRY: EnumTest(),
-            <caret>
+    <caret>
 }

idea/testData/indentationOnNewline/InEnumInitializerListAfterComma.after.kt

@@ -4,5 +4,5 @@ interface A1
 
 enum class EnumTest {
     ENTRY: EnumTest(),
-           <caret>
+    <caret>
 }

idea/testData/indentationOnNewline/InEnumInitializerListNotEmpty.after.inv.kt

@@ -4,5 +4,5 @@ interface A1
 
 enum class EnumTest {
     ENTRY: EnumTest(),
-            <caret>A1
+    <caret>A1
 }

idea/testData/indentationOnNewline/InEnumInitializerListNotEmpty.after.kt

@@ -4,5 +4,5 @@ interface A1
 
 enum class EnumTest {
     ENTRY: EnumTest(),
-           <caret>A1
+    <caret>A1
 }

idea/tests/org/jetbrains/kotlin/formatter/JetTypingIndentationTestBaseGenerated.java

@@ -169,6 +169,12 @@ public class JetTypingIndentationTestBaseGenerated extends AbstractJetTypingInde
             doNewlineTest(fileName);
         }
 
+        @TestMetadata("InEnumAfterSemicolon.after.kt")
+        public void testInEnumAfterSemicolon() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/indentationOnNewline/InEnumAfterSemicolon.after.kt");
+            doNewlineTest(fileName);
+        }
+
         @TestMetadata("InEnumInitializerListAfterColon.after.kt")
         public void testInEnumInitializerListAfterColon() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/indentationOnNewline/InEnumInitializerListAfterColon.after.kt");
@@ -385,6 +391,12 @@ public class JetTypingIndentationTestBaseGenerated extends AbstractJetTypingInde
             doNewlineTestWithInvert(fileName);
         }
 
+        @TestMetadata("InEnumAfterSemicolon.after.inv.kt")
+        public void testInEnumAfterSemicolon() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/indentationOnNewline/InEnumAfterSemicolon.after.inv.kt");
+            doNewlineTestWithInvert(fileName);
+        }
+
         @TestMetadata("InEnumInitializerListAfterColon.after.inv.kt")
         public void testInEnumInitializerListAfterColon() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/indentationOnNewline/InEnumInitializerListAfterColon.after.inv.kt");