Introduce PropertyDescriptor.isDelegated, write new flag to metadata

#KT-8384 In Progress

core/deserialization/src/descriptors.proto

@@ -301,6 +301,8 @@ message Property {
     isConst
     lateinit
     hasConstant
+    isExternal
+    isDelegated
   */
   optional int32 flags = 11 [default = 518 /* public (6) final property with getter (512) */];
   optional int32 old_flags = 1 [default = 2054];

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

@@ -20,7 +20,6 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.descriptors.*;
 import org.jetbrains.kotlin.protobuf.Internal;
-import org.jetbrains.kotlin.types.KotlinType;
 
 public class Flags {
     private Flags() {}
@@ -67,6 +66,7 @@ public class Flags {
     public static final BooleanFlagField IS_LATEINIT = FlagField.booleanAfter(IS_CONST);
     public static final BooleanFlagField HAS_CONSTANT = FlagField.booleanAfter(IS_LATEINIT);
     public static final BooleanFlagField IS_EXTERNAL_PROPERTY = FlagField.booleanAfter(HAS_CONSTANT);
+    public static final BooleanFlagField IS_DELEGATED = FlagField.booleanAfter(IS_EXTERNAL_PROPERTY);
 
     // Parameters
 
@@ -173,7 +173,8 @@ public class Flags {
             boolean hasConstant,
             boolean isConst,
             boolean lateInit,
-            boolean isExternal
+            boolean isExternal,
+            boolean isDelegated
     ) {
         return HAS_ANNOTATIONS.toFlags(hasAnnotations)
                | VISIBILITY.toFlags(visibility(visibility))
@@ -186,6 +187,7 @@ public class Flags {
                | IS_LATEINIT.toFlags(lateInit)
                | HAS_CONSTANT.toFlags(hasConstant)
                | IS_EXTERNAL_PROPERTY.toFlags(isExternal)
+               | IS_DELEGATED.toFlags(isDelegated)
                 ;
     }
 

core/deserialization/src/org/jetbrains/kotlin/serialization/ProtoBuf.java

@@ -15322,6 +15322,8 @@ public final class ProtoBuf {
      *isConst
      *lateinit
      *hasConstant
+     *isExternal
+     *isDelegated
      * </pre>
      */
     boolean hasFlags();
@@ -15339,6 +15341,8 @@ public final class ProtoBuf {
      *isConst
      *lateinit
      *hasConstant
+     *isExternal
+     *isDelegated
      * </pre>
      */
     int getFlags();
@@ -15664,6 +15668,8 @@ public final class ProtoBuf {
      *isConst
      *lateinit
      *hasConstant
+     *isExternal
+     *isDelegated
      * </pre>
      */
     public boolean hasFlags() {
@@ -15683,6 +15689,8 @@ public final class ProtoBuf {
      *isConst
      *lateinit
      *hasConstant
+     *isExternal
+     *isDelegated
      * </pre>
      */
     public int getFlags() {
@@ -16371,6 +16379,8 @@ public final class ProtoBuf {
        *isConst
        *lateinit
        *hasConstant
+       *isExternal
+       *isDelegated
        * </pre>
        */
       public boolean hasFlags() {
@@ -16390,6 +16400,8 @@ public final class ProtoBuf {
        *isConst
        *lateinit
        *hasConstant
+       *isExternal
+       *isDelegated
        * </pre>
        */
       public int getFlags() {
@@ -16409,6 +16421,8 @@ public final class ProtoBuf {
        *isConst
        *lateinit
        *hasConstant
+       *isExternal
+       *isDelegated
        * </pre>
        */
       public Builder setFlags(int value) {
@@ -16431,6 +16445,8 @@ public final class ProtoBuf {
        *isConst
        *lateinit
        *hasConstant
+       *isExternal
+       *isDelegated
        * </pre>
        */
       public Builder clearFlags() {

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/MemberDeserializer.kt

@@ -47,6 +47,7 @@ class MemberDeserializer(private val c: DeserializationContext) {
                 Flags.IS_LATEINIT.get(flags),
                 Flags.IS_CONST.get(flags),
                 Flags.IS_EXTERNAL_PROPERTY.get(flags),
+                Flags.IS_DELEGATED.get(flags),
                 proto,
                 c.nameResolver,
                 c.typeTable,

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

@@ -105,6 +105,7 @@ class DeserializedPropertyDescriptor(
         isLateInit: Boolean,
         isConst: Boolean,
         isExternal: Boolean,
+        isDelegated: Boolean,
         override val proto: ProtoBuf.Property,
         override val nameResolver: NameResolver,
         override val typeTable: TypeTable,
@@ -113,7 +114,7 @@ class DeserializedPropertyDescriptor(
 ) : DeserializedCallableMemberDescriptor,
         PropertyDescriptorImpl(containingDeclaration, original, annotations,
                                modality, visibility, isVar, name, kind, SourceElement.NO_SOURCE, isLateInit, isConst, false, false,
-                               isExternal) {
+                               isExternal, isDelegated) {
 
     override fun createSubstitutedCopy(
             newOwner: DeclarationDescriptor,
@@ -124,6 +125,7 @@ class DeserializedPropertyDescriptor(
     ): PropertyDescriptorImpl {
         return DeserializedPropertyDescriptor(
                 newOwner, original, annotations, newModality, newVisibility, isVar, name, kind, isLateInit, isConst, isExternal,
+                @Suppress("DEPRECATION") isDelegated,
                 proto, nameResolver, typeTable, sinceKotlinInfoTable, containerSource
         )
     }