FIC: Introduce isFun property for descriptors and proto

core/metadata/src/metadata.proto

@@ -209,6 +209,7 @@ message Class {
     isExternal
     isExpect
     isInline
+    isFun
   */
   optional int32 flags = 1 [default = 6 /* public final class, no annotations */];
 

core/metadata/src/org/jetbrains/kotlin/metadata/ProtoBuf.java

@@ -8273,6 +8273,7 @@ public final class ProtoBuf {
      *isExternal
      *isExpect
      *isInline
+     *isFun
      * </pre>
      */
     boolean hasFlags();
@@ -8289,6 +8290,7 @@ public final class ProtoBuf {
      *isExternal
      *isExpect
      *isInline
+     *isFun
      * </pre>
      */
     int getFlags();
@@ -8914,6 +8916,7 @@ public final class ProtoBuf {
      *isExternal
      *isExpect
      *isInline
+     *isFun
      * </pre>
      */
     public boolean hasFlags() {
@@ -8932,6 +8935,7 @@ public final class ProtoBuf {
      *isExternal
      *isExpect
      *isInline
+     *isFun
      * </pre>
      */
     public int getFlags() {
@@ -10059,6 +10063,7 @@ public final class ProtoBuf {
        *isExternal
        *isExpect
        *isInline
+       *isFun
        * </pre>
        */
       public boolean hasFlags() {
@@ -10077,6 +10082,7 @@ public final class ProtoBuf {
        *isExternal
        *isExpect
        *isInline
+       *isFun
        * </pre>
        */
       public int getFlags() {
@@ -10095,6 +10101,7 @@ public final class ProtoBuf {
        *isExternal
        *isExpect
        *isInline
+       *isFun
        * </pre>
        */
       public Builder setFlags(int value) {
@@ -10116,6 +10123,7 @@ public final class ProtoBuf {
        *isExternal
        *isExpect
        *isInline
+       *isFun
        * </pre>
        */
       public Builder clearFlags() {

core/metadata/src/org/jetbrains/kotlin/metadata/deserialization/Flags.java

@@ -30,6 +30,7 @@ public class Flags {
     public static final BooleanFlagField IS_EXTERNAL_CLASS = FlagField.booleanAfter(IS_DATA);
     public static final BooleanFlagField IS_EXPECT_CLASS = FlagField.booleanAfter(IS_EXTERNAL_CLASS);
     public static final BooleanFlagField IS_INLINE_CLASS = FlagField.booleanAfter(IS_EXPECT_CLASS);
+    public static final BooleanFlagField IS_FUN_INTERFACE = FlagField.booleanAfter(IS_INLINE_CLASS);
 
     // Constructors
 
@@ -95,7 +96,8 @@ public class Flags {
             boolean isData,
             boolean isExternal,
             boolean isExpect,
-            boolean isInline
+            boolean isInline,
+            boolean isFun
     ) {
         return HAS_ANNOTATIONS.toFlags(hasAnnotations)
                | MODALITY.toFlags(modality)
@@ -106,6 +108,7 @@ public class Flags {
                | IS_EXTERNAL_CLASS.toFlags(isExternal)
                | IS_EXPECT_CLASS.toFlags(isExpect)
                | IS_INLINE_CLASS.toFlags(isInline)
+               | IS_FUN_INTERFACE.toFlags(isFun)
                 ;
     }