Value classes: Add isValue property to class descriptors

Reuse isInline flag in proto and IR.
Check metadata version on deserialization.

compiler/frontend/src/org/jetbrains/kotlin/psi/synthetics/SyntheticClassOrObjectDescriptor.kt

@@ -83,6 +83,7 @@ class SyntheticClassOrObjectDescriptor(
     override fun isExpect() = false
     override fun isActual() = false
     override fun isFun() = false
+    override fun isValue() = false
 
     override fun getCompanionObjectDescriptor(): ClassDescriptorWithResolutionScopes? = null
     override fun getTypeConstructor(): TypeConstructor = typeConstructor

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyClassDescriptor.java

@@ -87,6 +87,7 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
     private final boolean isExpect;
     private final boolean isActual;
     private final boolean isFun;
+    private final boolean isValue;
 
     private final Annotations annotations;
     private final Annotations danglingAnnotations;
@@ -160,6 +161,7 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
                         containingDeclaration instanceof ClassDescriptor && ((ClassDescriptor) containingDeclaration).isExpect();
 
         this.isFun = modifierList != null && PsiUtilsKt.hasFunModifier(modifierList);
+        this.isValue = modifierList != null && PsiUtilsKt.hasValueModifier(modifierList);
 
         // Annotation entries are taken from both own annotations (if any) and object literal annotations (if any)
         List<KtAnnotationEntry> annotationEntries = new ArrayList<>();
@@ -552,6 +554,11 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
         return isFun;
     }
 
+    @Override
+    public boolean isValue() {
+        return isValue;
+    }
+
     @NotNull
     @Override
     public Annotations getAnnotations() {

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/IrBasedDescriptors.kt

@@ -604,6 +604,9 @@ open class IrBasedClassDescriptor(owner: IrClass) : ClassDescriptor, IrBasedDecl
 
     override fun isFun() = owner.isFun
 
+    // In IR, inline and value are synonyms
+    override fun isValue() = owner.isInline
+
     override fun getThisAsReceiverParameter() = owner.thisReceiver?.toIrBasedDescriptor() as ReceiverParameterDescriptor
 
     override fun getUnsubstitutedPrimaryConstructor() =
@@ -704,6 +707,8 @@ open class IrBasedEnumEntryDescriptor(owner: IrEnumEntry) : ClassDescriptor, IrB
 
     override fun isFun() = false
 
+    override fun isValue() = false
+
     override fun getThisAsReceiverParameter() = (owner.parent as IrClass).toIrBasedDescriptor().thisAsReceiverParameter
 
     override fun getUnsubstitutedPrimaryConstructor(): ClassConstructorDescriptor? {

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/WrappedDescriptors.kt

@@ -583,6 +583,8 @@ open class WrappedClassDescriptor : ClassDescriptor, WrappedDeclarationDescripto
 
     override fun isFun() = owner.isFun
 
+    override fun isValue() = owner.isInline
+
     override fun getThisAsReceiverParameter() = owner.thisReceiver?.descriptor as ReceiverParameterDescriptor
 
     override fun getUnsubstitutedPrimaryConstructor() =
@@ -682,6 +684,8 @@ open class WrappedScriptDescriptor : ScriptDescriptor, WrappedDeclarationDescrip
 
     override fun isFun() = false
 
+    override fun isValue() = false
+
     override fun getThisAsReceiverParameter() = owner.thisReceiver.descriptor as ReceiverParameterDescriptor
 
     override fun getUnsubstitutedPrimaryConstructor() = TODO()
@@ -822,6 +826,8 @@ open class WrappedEnumEntryDescriptor : ClassDescriptor, WrappedDeclarationDescr
 
     override fun isFun() = false
 
+    override fun isValue() = false
+
     override fun getThisAsReceiverParameter() = (owner.parent as IrClass).descriptor.thisAsReceiverParameter
 
     override fun getUnsubstitutedPrimaryConstructor(): ClassConstructorDescriptor? {

compiler/psi/src/org/jetbrains/kotlin/psi/psiUtil/psiUtils.kt

@@ -452,6 +452,8 @@ fun KtModifierList.hasSuspendModifier() = hasModifier(KtTokens.SUSPEND_KEYWORD)
 
 fun KtModifierList.hasFunModifier() = hasModifier(KtTokens.FUN_KEYWORD)
 
+fun KtModifierList.hasValueModifier() = hasModifier(KtTokens.VALUE_KEYWORD)
+
 fun ASTNode.children() = generateSequence(firstChildNode) { node -> node.treeNext }
 fun ASTNode.parents() = generateSequence(treeParent) { node -> node.treeParent }
 

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

@@ -105,6 +105,7 @@ class LazyJavaClassDescriptor(
     override fun isExpect() = false
     override fun isActual() = false
     override fun isFun() = false
+    override fun isValue() = false
 
     private val typeConstructor = LazyJavaClassTypeConstructor()
     override fun getTypeConstructor(): TypeConstructor = typeConstructor

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

@@ -81,6 +81,7 @@ class FunctionClassDescriptor(
     override fun isData() = false
     override fun isInline() = false
     override fun isFun() = false
+    override fun isValue() = false
     override fun isExpect() = false
     override fun isActual() = false
     override fun isExternal() = false

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

@@ -72,6 +72,8 @@ public interface ClassDescriptor extends ClassifierDescriptorWithTypeParameters,
 
     boolean isFun();
 
+    boolean isValue();
+
     @NotNull
     ReceiverParameterDescriptor getThisAsReceiverParameter();
 

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

@@ -71,6 +71,7 @@ class NotFoundClasses(private val storageManager: StorageManager, private val mo
         override fun isData() = false
         override fun isInline() = false
         override fun isFun() = false
+        override fun isValue() = false
         override fun isExpect() = false
         override fun isActual() = false
         override fun isExternal() = false

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

@@ -148,6 +148,11 @@ public class ClassDescriptorImpl extends ClassDescriptorBase {
         return false;
     }
 
+    @Override
+    public boolean isValue() {
+        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 isValue() {
+        return false;
+    }
+
     @Override
     public boolean isFun() {
         return false;

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

@@ -248,6 +248,11 @@ public class LazySubstitutingClassDescriptor extends ModuleAwareClassDescriptor
         return original.isFun();
     }
 
+    @Override
+    public boolean isValue() {
+        return original.isValue();
+    }
+
     @Override
     public boolean isExternal() {
         return original.isExternal();

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

@@ -104,6 +104,11 @@ public class MutableClassDescriptor extends ClassDescriptorBase {
         return false;
     }
 
+    @Override
+    public boolean isValue() {
+        return false;
+    }
+
     @Override
     public boolean isCompanionObject() {
         return false;

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

@@ -98,7 +98,7 @@ class DeserializedClassDescriptor(
 
     override fun isData() = Flags.IS_DATA.get(classProto.flags)
 
-    override fun isInline() = Flags.IS_INLINE_CLASS.get(classProto.flags)
+    override fun isInline() = Flags.IS_INLINE_CLASS.get(classProto.flags) && metadataVersion.isAtMost(1, 4, 1)
 
     override fun isExpect() = Flags.IS_EXPECT_CLASS.get(classProto.flags)
 
@@ -108,6 +108,8 @@ class DeserializedClassDescriptor(
 
     override fun isFun() = Flags.IS_FUN_INTERFACE.get(classProto.flags)
 
+    override fun isValue() = Flags.IS_INLINE_CLASS.get(classProto.flags) && metadataVersion.isAtLeast(1, 4, 2)
+
     override fun getUnsubstitutedMemberScope(kotlinTypeRefiner: KotlinTypeRefiner): MemberScope =
         memberScopeHolder.getScope(kotlinTypeRefiner)
 

core/metadata/src/org/jetbrains/kotlin/metadata/deserialization/BinaryVersion.kt

@@ -48,6 +48,19 @@ abstract class BinaryVersion(private vararg val numbers: Int) {
         return this.patch >= patch
     }
 
+    fun isAtMost(version: BinaryVersion): Boolean =
+        isAtMost(version.major, version.minor, version.patch)
+
+    fun isAtMost(major: Int, minor: Int, patch: Int): Boolean {
+        if (this.major < major) return true
+        if (this.major > major) return false
+
+        if (this.minor < minor) return true
+        if (this.minor > minor) return false
+
+        return this.patch <= patch
+    }
+
     override fun toString(): String {
         val versions = toArray().takeWhile { it != UNKNOWN }
         return if (versions.isEmpty()) "unknown" else versions.joinToString(".")

native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/builder/CommonizedClassDescriptor.kt

@@ -80,6 +80,7 @@ class CommonizedClassDescriptor(
     override fun isExpect() = isExpect
     override fun isActual() = isActual
     override fun isFun() = false // TODO: modifier "fun" should be accessible from here too
+    override fun isValue() = false // TODO: modifier "value" should be accessible from here too
 
     override fun getUnsubstitutedMemberScope(kotlinTypeRefiner: KotlinTypeRefiner): CommonizedMemberScope {
         check(kotlinTypeRefiner == KotlinTypeRefiner.Default) {