Evaluate range classes in interpreter if constructor's body is missing

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/builtins/IrBuiltInsMapGenerated.kt

@@ -52,6 +52,7 @@ internal fun interpretUnaryFunction(name: String, type: String, a: Any?): Any? {
             "String" -> return (a as String).toString()
             "Any" -> return (a as Any).toString()
             "Any?" -> return a?.toString() ?: "null"
+            "Unit" -> return Unit.toString()
         }
         "dec" -> when (type) {
             "Char" -> return (a as Char).dec()

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/Wrapper.kt

@@ -13,7 +13,6 @@ import org.jetbrains.kotlin.ir.interpreter.*
 import org.jetbrains.kotlin.ir.interpreter.stack.Field
 import org.jetbrains.kotlin.ir.interpreter.stack.Fields
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
-import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.util.capitalizeDecapitalize.capitalizeAsciiOnly
@@ -110,6 +109,8 @@ internal class Wrapper(val value: Any, override val irClass: IrClass, environmen
             "Array.kotlin.collections.copyToArrayOfAny(Boolean)" to "kotlin.collections.CollectionsKt",
         )
 
+        private val ranges = setOf("kotlin.ranges.CharRange", "kotlin.ranges.IntRange", "kotlin.ranges.LongRange")
+
         private fun IrFunction.getSignature(): String {
             val fqName = this.fqName
             val receiver = (dispatchReceiverParameter ?: extensionReceiverParameter)?.type?.getOnlyName()?.let { "$it." } ?: ""
@@ -121,9 +122,11 @@ internal class Wrapper(val value: Any, override val irClass: IrClass, environmen
         }
 
         fun mustBeHandledWithWrapper(declaration: IrDeclarationWithName): Boolean {
-            return when (declaration) {
-                is IrFunction -> declaration.getSignature() in intrinsicFunctionToHandler
-                else -> declaration.fqName.let { it in intrinsicClasses || it.startsWith("java") }
+            if (declaration is IrFunction) return declaration.getSignature() in intrinsicFunctionToHandler
+            val fqName = declaration.fqName
+            return when {
+                fqName in ranges && (declaration as IrClass).primaryConstructor!!.body == null -> true
+                else -> fqName in intrinsicClasses || fqName.startsWith("java")
             }
         }
 

compiler/testData/ir/interpreter/helpers/Strings.kt

@@ -36,10 +36,10 @@ public inline fun CharSequence.isEmpty(): Boolean = length == 0
 
 public inline fun CharSequence.isNotEmpty(): Boolean = length > 0
 
-public operator fun CharSequence.iterator(): CharIterator = object : CharIterator() {
+public operator fun CharSequence.iterator(): Iterator<Char> = object : Iterator<Char> {
     private var index = 0
 
-    public override fun nextChar(): Char = get(index++)
+    public override fun next(): Char = get(index++)
 
     public override fun hasNext(): Boolean = index < length
 }

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/services/sourceProviders/IrInterpreterHelpersSourceFilesProvider.kt

@@ -19,7 +19,9 @@ class IrInterpreterHelpersSourceFilesProvider(testServices: TestServices) : Addi
         private const val HELPERS_PATH = "./compiler/testData/ir/interpreter/helpers"
         private const val UNSIGNED_PATH = "./libraries/stdlib/unsigned/src/kotlin"
         private val RUNTIME_PATHS = arrayOf(
-            "./core/builtins/src/kotlin",
+            "./core/builtins/src/kotlin/Progressions.kt",
+            "./core/builtins/src/kotlin/ProgressionIterators.kt",
+            "./core/builtins/src/kotlin/internal/progressionUtil.kt",
             "./libraries/stdlib/jvm/runtime/kotlin/TypeAliases.kt",
             "./libraries/stdlib/jvm/runtime/kotlin/text/TypeAliases.kt",
             "./libraries/stdlib/jvm/src/kotlin/collections/TypeAliases.kt",
@@ -28,7 +30,9 @@ class IrInterpreterHelpersSourceFilesProvider(testServices: TestServices) : Addi
             "./libraries/stdlib/src/kotlin/collections/Sequence.kt",
         )
         private val ANNOTATIONS_PATHS = arrayOf(
-            "./libraries/stdlib/src/kotlin/annotations",
+            "./libraries/stdlib/src/kotlin/annotations/Experimental.kt",
+            "./libraries/stdlib/src/kotlin/annotations/ExperimentalStdlibApi.kt",
+            "./libraries/stdlib/src/kotlin/annotations/OptIn.kt",
             "./libraries/stdlib/src/kotlin/internal/Annotations.kt",
             "./libraries/stdlib/src/kotlin/experimental/inferenceMarker.kt",
             "./libraries/stdlib/jvm/runtime/kotlin/jvm/annotations/JvmPlatformAnnotations.kt",

generators/interpreter/GenerateInterpreterMap.kt

@@ -55,6 +55,8 @@ fun generateMap(): String {
         val irNullCheck = irBuiltIns.checkNotNullSymbol.owner
         this += Operation(irNullCheck.name.asString(), listOf("T0?"), customExpression = "a!!")
         this += Operation("toString", listOf("Any?"), customExpression = "a?.toString() ?: \"null\"")
+        // TODO next operation can be dropped after serialization introduction
+        this += Operation("toString", listOf("Unit"), customExpression = "Unit.toString()")
     })
 
     generateInterpretBinaryFunction(p, getOperationMap(2) + getBinaryIrOperationMap(irBuiltIns) + getExtensionOperationMap())