FIC: Introduce isFun property for descriptors and proto

core/descriptors.jvm/src/org/jetbrains/kotlin/load/java/lazy/descriptors/LazyJavaClassDescriptor.kt

@@ -97,6 +97,7 @@ class LazyJavaClassDescriptor(
     override fun isCompanionObject() = false
     override fun isExpect() = false
     override fun isActual() = false
+    override fun isFun() = false
 
     private val typeConstructor = LazyJavaClassTypeConstructor()
     override fun getTypeConstructor(): TypeConstructor = typeConstructor

core/descriptors/src/org/jetbrains/kotlin/builtins/functions/FunctionClassDescriptor.kt

@@ -95,6 +95,7 @@ class FunctionClassDescriptor(
     override fun isInner() = false
     override fun isData() = false
     override fun isInline() = false
+    override fun isFun() = false
     override fun isExpect() = false
     override fun isActual() = false
     override fun isExternal() = false

core/descriptors/src/org/jetbrains/kotlin/descriptors/ClassDescriptor.java

@@ -70,6 +70,8 @@ public interface ClassDescriptor extends ClassifierDescriptorWithTypeParameters,
 
     boolean isInline();
 
+    boolean isFun();
+
     @NotNull
     ReceiverParameterDescriptor getThisAsReceiverParameter();
 

core/descriptors/src/org/jetbrains/kotlin/descriptors/NotFoundClasses.kt

@@ -69,6 +69,7 @@ class NotFoundClasses(private val storageManager: StorageManager, private val mo
         override fun isCompanionObject() = false
         override fun isData() = false
         override fun isInline() = false
+        override fun isFun() = false
         override fun isExpect() = false
         override fun isActual() = false
         override fun isExternal() = false

core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/ClassDescriptorImpl.java

@@ -144,6 +144,11 @@ public class ClassDescriptorImpl extends ClassDescriptorBase {
         return false;
     }
 
+    @Override
+    public boolean isFun() {
+        return false;
+    }
+
     @Override
     public boolean isInner() {
         return false;

core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/EnumEntrySyntheticClassDescriptor.java

@@ -138,6 +138,11 @@ public class EnumEntrySyntheticClassDescriptor extends ClassDescriptorBase {
         return false;
     }
 
+    @Override
+    public boolean isFun() {
+        return false;
+    }
+
     @Override
     public boolean isCompanionObject() {
         return false;

core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/LazySubstitutingClassDescriptor.java

@@ -243,6 +243,11 @@ public class LazySubstitutingClassDescriptor extends ModuleAwareClassDescriptor
         return original.isInline();
     }
 
+    @Override
+    public boolean isFun() {
+        return original.isFun();
+    }
+
     @Override
     public boolean isExternal() {
         return original.isExternal();

core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/MutableClassDescriptor.java

@@ -99,6 +99,11 @@ public class MutableClassDescriptor extends ClassDescriptorBase {
         return false;
     }
 
+    @Override
+    public boolean isFun() {
+        return false;
+    }
+
     @Override
     public boolean isCompanionObject() {
         return false;

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/descriptors/DeserializedClassDescriptor.kt

@@ -104,6 +104,8 @@ class DeserializedClassDescriptor(
 
     override fun isExternal() = Flags.IS_EXTERNAL_CLASS.get(classProto.flags)
 
+    override fun isFun() = Flags.IS_FUN_INTERFACE.get(classProto.flags)
+
     override fun getUnsubstitutedMemberScope(kotlinTypeRefiner: KotlinTypeRefiner): MemberScope =
         memberScopeHolder.getScope(kotlinTypeRefiner)
 

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)
                 ;
     }