FIC: propagate info about conversions for deserialized classes

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

@@ -44,7 +44,8 @@ class MetadataPackageFragmentProvider(
     notFoundClasses: NotFoundClasses,
     private val metadataPartProvider: MetadataPartProvider,
     contractDeserializer: ContractDeserializer,
-    kotlinTypeChecker: NewKotlinTypeChecker
+    kotlinTypeChecker: NewKotlinTypeChecker,
+    samConversionResolver: SamConversionResolver
 ) : AbstractDeserializedPackageFragmentProvider(storageManager, finder, moduleDescriptor) {
     init {
         components = DeserializationComponents(
@@ -63,7 +64,8 @@ class MetadataPackageFragmentProvider(
             contractDeserializer,
             AdditionalClassPartsProvider.None, PlatformDependentDeclarationFilter.All,
             BuiltInSerializerProtocol.extensionRegistry,
-            kotlinTypeChecker
+            kotlinTypeChecker,
+            samConversionResolver
         )
     }
 

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/builtins/BuiltInsLoaderImpl.kt

@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.descriptors.deserialization.ClassDescriptorFactory
 import org.jetbrains.kotlin.descriptors.deserialization.PlatformDependentDeclarationFilter
 import org.jetbrains.kotlin.incremental.components.LookupTracker
 import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.resolve.sam.SamConversionResolverImpl
 import org.jetbrains.kotlin.serialization.deserialization.*
 import org.jetbrains.kotlin.storage.StorageManager
 import java.io.InputStream
@@ -78,7 +79,8 @@ class BuiltInsLoaderImpl : BuiltInsLoader {
             ContractDeserializer.DEFAULT,
             additionalClassPartsProvider,
             platformDependentDeclarationFilter,
-            BuiltInSerializerProtocol.extensionRegistry
+            BuiltInSerializerProtocol.extensionRegistry,
+            samConversionResolver = SamConversionResolverImpl(storageManager, samWithReceiverResolvers = emptyList())
         )
 
         for (packageFragment in packageFragments) {

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

@@ -49,7 +49,8 @@ class DeserializationComponents(
     val additionalClassPartsProvider: AdditionalClassPartsProvider = AdditionalClassPartsProvider.None,
     val platformDependentDeclarationFilter: PlatformDependentDeclarationFilter = PlatformDependentDeclarationFilter.All,
     val extensionRegistryLite: ExtensionRegistryLite,
-    val kotlinTypeChecker: NewKotlinTypeChecker = NewKotlinTypeChecker.Default
+    val kotlinTypeChecker: NewKotlinTypeChecker = NewKotlinTypeChecker.Default,
+    val samConversionResolver: SamConversionResolver
 ) {
     val classDeserializer: ClassDeserializer = ClassDeserializer(this)
 

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

@@ -26,6 +26,7 @@ import org.jetbrains.kotlin.resolve.scopes.StaticScopeForKotlinEnum
 import org.jetbrains.kotlin.serialization.deserialization.*
 import org.jetbrains.kotlin.types.AbstractClassTypeConstructor
 import org.jetbrains.kotlin.types.KotlinType
+import org.jetbrains.kotlin.types.SimpleType
 import org.jetbrains.kotlin.types.TypeConstructor
 import org.jetbrains.kotlin.types.checker.KotlinTypeRefiner
 import org.jetbrains.kotlin.types.refinement.TypeRefinement
@@ -172,6 +173,12 @@ class DeserializedClassDescriptor(
 
     override fun getDeclaredTypeParameters() = c.typeDeserializer.ownTypeParameters
 
+    override fun getDefaultFunctionTypeForSamInterface(): SimpleType? {
+        return c.components.samConversionResolver.resolveFunctionTypeIfSamInterface(this)
+    }
+
+    override fun isDefinitelyNotSamInterface() = !isFun
+
     private inner class DeserializedClassTypeConstructor : AbstractClassTypeConstructor(c.storageManager) {
         private val parameters = c.storageManager.createLazyValue {
             this@DeserializedClassDescriptor.computeConstructorTypeParameters()