Extract all reflection state classes into separate files

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/reflection/KClassState.kt

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.interpreter.state.reflection
+
+import org.jetbrains.kotlin.ir.declarations.IrClass
+import org.jetbrains.kotlin.ir.declarations.IrConstructor
+import org.jetbrains.kotlin.ir.declarations.IrFunction
+import org.jetbrains.kotlin.ir.declarations.IrProperty
+import org.jetbrains.kotlin.ir.expressions.IrClassReference
+import org.jetbrains.kotlin.ir.interpreter.IrInterpreter
+import org.jetbrains.kotlin.ir.interpreter.internalName
+import org.jetbrains.kotlin.ir.interpreter.proxy.Proxy
+import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KFunctionProxy
+import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KProperty1Proxy
+import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KTypeParameterProxy
+import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KTypeProxy
+import kotlin.reflect.KCallable
+import kotlin.reflect.KFunction
+import kotlin.reflect.KType
+import kotlin.reflect.KTypeParameter
+
+internal class KClassState(override val irClass: IrClass) : ReflectionState(irClass.symbol) {
+    private var _members: Collection<KCallable<*>>? = null
+    private var _constructors: Collection<KFunction<*>>? = null
+    private var _typeParameters: List<KTypeParameter>? = null
+    private var _supertypes: List<KType>? = null
+
+    constructor(classReference: IrClassReference) : this(classReference.symbol.owner as IrClass)
+
+    fun getMembers(interpreter: IrInterpreter): Collection<KCallable<*>> {
+        if (_members != null) return _members!!
+        _members = irClass.declarations
+            .filter { it !is IrClass && it !is IrConstructor }
+            .map {
+                when (it) {
+                    is IrProperty -> KProperty1Proxy(KPropertyState(it, null, null), interpreter) // TODO KProperty2
+                    is IrFunction -> KFunctionProxy(KFunctionState(it, interpreter.irBuiltIns.functionFactory), interpreter)
+                    else -> TODO()
+                }
+            }
+        return _members!!
+    }
+
+    fun getConstructors(interpreter: IrInterpreter): Collection<KFunction<*>> {
+        if (_constructors != null) return _constructors!!
+        _constructors = irClass.declarations
+            .filterIsInstance<IrConstructor>()
+            .map { KFunctionProxy(KFunctionState(it, interpreter.irBuiltIns.functionFactory), interpreter) }
+        return _constructors!!
+    }
+
+    fun getTypeParameters(interpreter: IrInterpreter): List<KTypeParameter> {
+        if (_typeParameters != null) return _typeParameters!!
+        _typeParameters = irClass.typeParameters.map { KTypeParameterProxy(KTypeParameterState(it), interpreter) }
+        return _typeParameters!!
+    }
+
+    fun getSupertypes(interpreter: IrInterpreter): List<KType> {
+        if (_supertypes != null) return _supertypes!!
+        _supertypes = (irClass.superTypes.map { it } + interpreter.irBuiltIns.anyType).toSet()
+            .map { KTypeProxy(KTypeState(it), interpreter) }
+        return _supertypes!!
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as KClassState
+
+        if (irClass != other.irClass) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        return irClass.hashCode()
+    }
+
+    override fun toString(): String {
+        return "class ${irClass.internalName()}"
+    }
+}

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/reflection/KFunctionState.kt

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.interpreter.state.reflection
+
+import org.jetbrains.kotlin.ir.declarations.IrClass
+import org.jetbrains.kotlin.ir.declarations.IrConstructor
+import org.jetbrains.kotlin.ir.declarations.IrFunction
+import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
+import org.jetbrains.kotlin.ir.descriptors.IrAbstractFunctionFactory
+import org.jetbrains.kotlin.ir.expressions.IrCall
+import org.jetbrains.kotlin.ir.expressions.IrFunctionReference
+import org.jetbrains.kotlin.ir.interpreter.IrInterpreter
+import org.jetbrains.kotlin.ir.interpreter.getLastOverridden
+import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KTypeParameterProxy
+import org.jetbrains.kotlin.ir.interpreter.renderType
+import org.jetbrains.kotlin.ir.interpreter.stack.Variable
+import org.jetbrains.kotlin.ir.types.classOrNull
+import org.jetbrains.kotlin.ir.util.defaultType
+import org.jetbrains.kotlin.ir.util.nameForIrSerialization
+import org.jetbrains.kotlin.ir.util.parentAsClass
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.utils.addToStdlib.cast
+import kotlin.reflect.KTypeParameter
+
+internal class KFunctionState(val irFunction: IrFunction, override val irClass: IrClass) : ReflectionState(irClass.symbol) {
+    override val fields: MutableList<Variable> = mutableListOf()
+    override val typeArguments: MutableList<Variable> = mutableListOf()
+    private var _typeParameters: List<KTypeParameter>? = null
+
+    constructor(functionReference: IrFunctionReference) : this(functionReference.symbol.owner, functionReference.type.classOrNull!!.owner)
+    constructor(irFunction: IrFunction, functionFactory: IrAbstractFunctionFactory) :
+            this(irFunction, functionFactory.kFunctionN(irFunction.valueParameters.size))
+
+    fun getTypeParameters(interpreter: IrInterpreter): List<KTypeParameter> {
+        if (_typeParameters != null) return _typeParameters!!
+        _typeParameters = irClass.typeParameters.map { KTypeParameterProxy(KTypeParameterState(it), interpreter) }
+        return _typeParameters!!
+    }
+
+    private val invokeSymbol = irClass.declarations
+        .single { it.nameForIrSerialization.asString() == "invoke" }
+        .cast<IrSimpleFunction>()
+        .getLastOverridden().symbol
+
+    fun getArity(): Int? {
+        return irClass.name.asString().removePrefix("Function").removePrefix("KFunction").toIntOrNull()
+    }
+
+    override fun getIrFunctionByIrCall(expression: IrCall): IrFunction? {
+        return if (invokeSymbol == expression.symbol) irFunction else null
+    }
+
+    private fun isLambda(): Boolean = irFunction.name.let { it == Name.special("<anonymous>") || it == Name.special("<no name provided>") }
+
+    override fun toString(): String {
+        return if (isLambda()) {
+            val receiver = (irFunction.dispatchReceiverParameter?.type ?: irFunction.extensionReceiverParameter?.type)?.renderType()
+            val arguments = irFunction.valueParameters.joinToString(prefix = "(", postfix = ")") { it.type.renderType() }
+            val returnType = irFunction.returnType.renderType()
+            ("$arguments -> $returnType").let { if (receiver != null) "$receiver.$it" else it }
+        } else {
+            val dispatchReceiver = irFunction.parentAsClass.defaultType // = instanceReceiverParameter
+            val extensionReceiver = irFunction.extensionReceiverParameter?.type
+            val receivers = if (irFunction is IrConstructor) "" else renderReceivers(dispatchReceiver, extensionReceiver)
+            val arguments = irFunction.valueParameters.joinToString(prefix = "(", postfix = ")") { it.type.renderType() }
+            val returnType = irFunction.returnType.renderType()
+            "fun $receivers${irFunction.name}$arguments: $returnType"
+        }
+    }
+}

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/reflection/KParameterState.kt

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.interpreter.state.reflection
+
+import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.types.classifierOrFail
+
+internal class KParameterState(val irType: IrType) : ReflectionState(irType.classifierOrFail) {
+
+}

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/reflection/KPropertyState.kt

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.interpreter.state.reflection
+
+import org.jetbrains.kotlin.ir.declarations.IrProperty
+import org.jetbrains.kotlin.ir.expressions.IrPropertyReference
+import org.jetbrains.kotlin.ir.interpreter.renderType
+import org.jetbrains.kotlin.ir.interpreter.state.State
+import org.jetbrains.kotlin.ir.util.parentAsClass
+
+internal class KPropertyState(
+    val property: IrProperty, val dispatchReceiver: State?, val extensionReceiver: State?
+) : ReflectionState(property.parentAsClass.symbol) {
+    constructor(propertyReference: IrPropertyReference, dispatchReceiver: State?, extensionReceiver: State?)
+            : this(propertyReference.symbol.owner, dispatchReceiver, extensionReceiver)
+
+    fun isKProperty0(): Boolean {
+        return dispatchReceiver != null && extensionReceiver == null
+    }
+
+    fun isKProperty1(): Boolean {
+        return dispatchReceiver == null && extensionReceiver == null
+    }
+
+    fun isKProperty2(): Boolean {
+        return dispatchReceiver != null && extensionReceiver != null
+    }
+
+    fun isKMutableProperty0(): Boolean {
+        return isKProperty0() && property.isVar
+    }
+
+    fun isKMutableProperty1(): Boolean {
+        return isKProperty1() && property.isVar
+    }
+
+    fun isKMutableProperty2(): Boolean {
+        return isKProperty1() && property.isVar
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as KPropertyState
+
+        if (property != other.property) return false
+        if (dispatchReceiver != other.dispatchReceiver) return false
+        if (extensionReceiver != other.extensionReceiver) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = property.hashCode()
+        result = 31 * result + (dispatchReceiver?.hashCode() ?: 0)
+        result = 31 * result + (extensionReceiver?.hashCode() ?: 0)
+        return result
+    }
+
+    override fun toString(): String {
+        val prefix = if (property.isVar) "var" else "val"
+        val receivers = renderReceivers(property.getter?.dispatchReceiverParameter?.type, property.getter?.extensionReceiverParameter?.type)
+        val returnType = property.getter!!.returnType.renderType()
+        return "$prefix $receivers${property.name}: $returnType"
+    }
+}

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/reflection/KTypeParameterState.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.interpreter.state.reflection
+
+import org.jetbrains.kotlin.ir.declarations.IrTypeParameter
+import org.jetbrains.kotlin.ir.interpreter.IrInterpreter
+import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KTypeProxy
+import kotlin.reflect.KType
+
+internal class KTypeParameterState(val irTypeParameter: IrTypeParameter) : ReflectionState(irTypeParameter) {
+    private var _upperBounds: List<KType>? = null
+
+    fun getUpperBounds(interpreter: IrInterpreter): List<KType> {
+        if (_upperBounds != null) return _upperBounds!!
+        _upperBounds = irTypeParameter.superTypes.map { KTypeProxy(KTypeState(it), interpreter) }
+        return _upperBounds!!
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as KTypeParameterState
+
+        if (irTypeParameter != other.irTypeParameter) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        return irTypeParameter.hashCode()
+    }
+
+    override fun toString(): String {
+        return irTypeParameter.name.asString()
+    }
+}

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/reflection/KTypeState.kt

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.interpreter.state.reflection
+
+import org.jetbrains.kotlin.ir.interpreter.IrInterpreter
+import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KTypeProxy
+import org.jetbrains.kotlin.ir.interpreter.renderType
+import org.jetbrains.kotlin.ir.types.*
+import org.jetbrains.kotlin.types.Variance
+import kotlin.reflect.KTypeProjection
+
+internal class KTypeState(val irType: IrType) : ReflectionState(irType.classifierOrFail) {
+    private var _arguments: List<KTypeProjection>? = null
+
+    fun getArguments(interpreter: IrInterpreter): List<KTypeProjection> {
+        if (_arguments != null) return _arguments!!
+        _arguments = (irType as IrSimpleType).arguments
+            .map {
+                when (it.getVariance()) {
+                    Variance.INVARIANT -> KTypeProjection.invariant(KTypeProxy(KTypeState(it.typeOrNull!!), interpreter))
+                    Variance.IN_VARIANCE -> KTypeProjection.contravariant(KTypeProxy(KTypeState(it.typeOrNull!!), interpreter))
+                    Variance.OUT_VARIANCE -> KTypeProjection.covariant(KTypeProxy(KTypeState(it.typeOrNull!!), interpreter))
+                    null -> KTypeProjection.STAR
+                }
+            }
+        return _arguments!!
+    }
+
+    private fun IrTypeArgument.getVariance(): Variance? {
+        return when (this) {
+            is IrSimpleType -> Variance.INVARIANT
+            is IrTypeProjection -> this.variance
+            is IrStarProjection -> null
+            else -> TODO()
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as KTypeState
+
+        if (irType != other.irType) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        return irType.hashCode()
+    }
+
+    override fun toString(): String {
+        return irType.renderType()
+    }
+}

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/reflection/ReflectionState.kt

@@ -5,33 +5,18 @@
 
 package org.jetbrains.kotlin.ir.interpreter.state.reflection
 
-import org.jetbrains.kotlin.ir.declarations.*
+import org.jetbrains.kotlin.ir.declarations.IrClass
-import org.jetbrains.kotlin.ir.descriptors.IrAbstractFunctionFactory
+import org.jetbrains.kotlin.ir.declarations.IrFunction
+import org.jetbrains.kotlin.ir.declarations.IrTypeParameter
 import org.jetbrains.kotlin.ir.expressions.IrCall
-import org.jetbrains.kotlin.ir.expressions.IrClassReference
-import org.jetbrains.kotlin.ir.expressions.IrFunctionReference
-import org.jetbrains.kotlin.ir.expressions.IrPropertyReference
-import org.jetbrains.kotlin.ir.interpreter.IrInterpreter
-import org.jetbrains.kotlin.ir.interpreter.getLastOverridden
-import org.jetbrains.kotlin.ir.interpreter.internalName
-import org.jetbrains.kotlin.ir.interpreter.proxy.Proxy
-import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KFunctionProxy
-import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KProperty1Proxy
-import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KTypeParameterProxy
-import org.jetbrains.kotlin.ir.interpreter.proxy.reflection.KTypeProxy
 import org.jetbrains.kotlin.ir.interpreter.renderType
 import org.jetbrains.kotlin.ir.interpreter.stack.Variable
 import org.jetbrains.kotlin.ir.interpreter.state.State
 import org.jetbrains.kotlin.ir.symbols.IrClassifierSymbol
-import org.jetbrains.kotlin.ir.types.*
+import org.jetbrains.kotlin.ir.types.IrType
-import org.jetbrains.kotlin.ir.util.defaultType
+import org.jetbrains.kotlin.ir.types.classOrNull
-import org.jetbrains.kotlin.ir.util.nameForIrSerialization
+import org.jetbrains.kotlin.ir.types.classifierOrNull
-import org.jetbrains.kotlin.ir.util.parentAsClass
-import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.types.Variance
-import org.jetbrains.kotlin.utils.addToStdlib.cast
 import org.jetbrains.kotlin.utils.addToStdlib.firstNotNullResult
-import kotlin.reflect.*
 
 internal abstract class ReflectionState(val irClassifierSymbol: IrClassifierSymbol) : State {
     override val irClass: IrClass = irClassifierSymbol.extractClass()
@@ -69,250 +54,3 @@ internal abstract class ReflectionState(val irClassifierSymbol: IrClassifierSymb
         }
     }
 }
-
-internal class KClassState(override val irClass: IrClass) : ReflectionState(irClass.symbol) {
-    private var _members: Collection<KCallable<*>>? = null
-    private var _constructors: Collection<KFunction<Proxy>>? = null
-    private var _typeParameters: List<KTypeParameter>? = null
-    private var _supertypes: List<KType>? = null
-
-    constructor(classReference: IrClassReference) : this(classReference.symbol.owner as IrClass)
-
-    fun getMembers(interpreter: IrInterpreter): Collection<KCallable<*>> {
-        if (_members != null) return _members!!
-        _members = irClass.declarations
-            .filter { it !is IrClass && it !is IrConstructor }
-            .map {
-                when (it) {
-                    is IrProperty -> KProperty1Proxy(KPropertyState(it, null, null), interpreter) // TODO KProperty2
-                    is IrFunction -> KFunctionProxy(KFunctionState(it, interpreter.irBuiltIns.functionFactory), interpreter)
-                    else -> TODO()
-                }
-            }
-        return _members!!
-    }
-
-    fun getConstructors(interpreter: IrInterpreter): Collection<KFunction<Proxy>> {
-        if (_constructors != null) return _constructors!!
-        _constructors = irClass.declarations
-            .filterIsInstance<IrConstructor>()
-            .map { KFunctionProxy(KFunctionState(it, interpreter.irBuiltIns.functionFactory), interpreter) as KFunction<Proxy> }
-        return _constructors!!
-    }
-
-    fun getTypeParameters(interpreter: IrInterpreter): List<KTypeParameter> {
-        if (_typeParameters != null) return _typeParameters!!
-        _typeParameters = irClass.typeParameters.map { KTypeParameterProxy(KTypeParameterState(it), interpreter) }
-        return _typeParameters!!
-    }
-
-    fun getSupertypes(interpreter: IrInterpreter): List<KType> {
-        if (_supertypes != null) return _supertypes!!
-        _supertypes = (irClass.superTypes.map { it } + interpreter.irBuiltIns.anyType).toSet()
-            .map { KTypeProxy(KTypeState(it), interpreter) }
-        return _supertypes!!
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as KClassState
-
-        if (irClass != other.irClass) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        return irClass.hashCode()
-    }
-
-    override fun toString(): String {
-        return "class ${irClass.internalName()}"
-    }
-}
-
-internal class KPropertyState(
-    val property: IrProperty, val dispatchReceiver: State?, val extensionReceiver: State?
-) : ReflectionState(property.parentAsClass.symbol) {
-    constructor(propertyReference: IrPropertyReference, dispatchReceiver: State?, extensionReceiver: State?)
-            : this(propertyReference.symbol.owner, dispatchReceiver, extensionReceiver)
-
-    fun isKProperty0(): Boolean {
-        return dispatchReceiver != null && extensionReceiver == null
-    }
-
-    fun isKProperty1(): Boolean {
-        return dispatchReceiver == null && extensionReceiver == null
-    }
-
-    fun isKProperty2(): Boolean {
-        return dispatchReceiver != null && extensionReceiver != null
-    }
-
-    fun isKMutableProperty0(): Boolean {
-        return isKProperty0() && property.isVar
-    }
-
-    fun isKMutableProperty1(): Boolean {
-        return isKProperty1() && property.isVar
-    }
-
-    fun isKMutableProperty2(): Boolean {
-        return isKProperty1() && property.isVar
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as KPropertyState
-
-        if (property != other.property) return false
-        if (dispatchReceiver != other.dispatchReceiver) return false
-        if (extensionReceiver != other.extensionReceiver) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = property.hashCode()
-        result = 31 * result + (dispatchReceiver?.hashCode() ?: 0)
-        result = 31 * result + (extensionReceiver?.hashCode() ?: 0)
-        return result
-    }
-
-    override fun toString(): String {
-        val prefix = if (property.isVar) "var" else "val"
-        val receivers = renderReceivers(property.getter?.dispatchReceiverParameter?.type, property.getter?.extensionReceiverParameter?.type)
-        val returnType = property.getter!!.returnType.renderType()
-        return "$prefix $receivers${property.name}: $returnType"
-    }
-}
-
-internal class KFunctionState(val irFunction: IrFunction, override val irClass: IrClass) : ReflectionState(irClass.symbol) {
-    override val fields: MutableList<Variable> = mutableListOf()
-    override val typeArguments: MutableList<Variable> = mutableListOf()
-    private var _typeParameters: List<KTypeParameter>? = null
-
-    constructor(functionReference: IrFunctionReference) : this(functionReference.symbol.owner, functionReference.type.classOrNull!!.owner)
-    constructor(irFunction: IrFunction, functionFactory: IrAbstractFunctionFactory) :
-            this(irFunction, functionFactory.kFunctionN(irFunction.valueParameters.size))
-
-    fun getTypeParameters(interpreter: IrInterpreter): List<KTypeParameter> {
-        if (_typeParameters != null) return _typeParameters!!
-        _typeParameters = irClass.typeParameters.map { KTypeParameterProxy(KTypeParameterState(it), interpreter) }
-        return _typeParameters!!
-    }
-
-    private val invokeSymbol = irClass.declarations
-        .single { it.nameForIrSerialization.asString() == "invoke" }
-        .cast<IrSimpleFunction>()
-        .getLastOverridden().symbol
-
-    fun getArity(): Int? {
-        return irClass.name.asString().removePrefix("Function").removePrefix("KFunction").toIntOrNull()
-    }
-
-    override fun getIrFunctionByIrCall(expression: IrCall): IrFunction? {
-        return if (invokeSymbol == expression.symbol) irFunction else null
-    }
-
-    private fun isLambda(): Boolean = irFunction.name.let { it == Name.special("<anonymous>") || it == Name.special("<no name provided>") }
-
-    override fun toString(): String {
-        return if (isLambda()) {
-            val receiver = (irFunction.dispatchReceiverParameter?.type ?: irFunction.extensionReceiverParameter?.type)?.renderType()
-            val arguments = irFunction.valueParameters.joinToString(prefix = "(", postfix = ")") { it.type.renderType() }
-            val returnType = irFunction.returnType.renderType()
-            ("$arguments -> $returnType").let { if (receiver != null) "$receiver.$it" else it }
-        } else {
-            val dispatchReceiver = irFunction.parentAsClass.defaultType // = instanceReceiverParameter
-            val extensionReceiver = irFunction.extensionReceiverParameter?.type
-            val receivers = if (irFunction is IrConstructor) "" else renderReceivers(dispatchReceiver, extensionReceiver)
-            val arguments = irFunction.valueParameters.joinToString(prefix = "(", postfix = ")") { it.type.renderType() }
-            val returnType = irFunction.returnType.renderType()
-            "fun $receivers${irFunction.name}$arguments: $returnType"
-        }
-    }
-}
-
-internal class KTypeState(val irType: IrType) : ReflectionState(irType.classifierOrFail) {
-    private var _arguments: List<KTypeProjection>? = null
-
-    fun getArguments(interpreter: IrInterpreter): List<KTypeProjection> {
-        if (_arguments != null) return _arguments!!
-        _arguments = (irType as IrSimpleType).arguments
-            .map {
-                when (it.getVariance()) {
-                    Variance.INVARIANT -> KTypeProjection.invariant(KTypeProxy(KTypeState(it.typeOrNull!!), interpreter))
-                    Variance.IN_VARIANCE -> KTypeProjection.contravariant(KTypeProxy(KTypeState(it.typeOrNull!!), interpreter))
-                    Variance.OUT_VARIANCE -> KTypeProjection.covariant(KTypeProxy(KTypeState(it.typeOrNull!!), interpreter))
-                    null -> KTypeProjection.STAR
-                }
-            }
-        return _arguments!!
-    }
-
-    private fun IrTypeArgument.getVariance(): Variance? {
-        return when (this) {
-            is IrSimpleType -> Variance.INVARIANT
-            is IrTypeProjection -> this.variance
-            is IrStarProjection -> null
-            else -> TODO()
-        }
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as KTypeState
-
-        if (irType != other.irType) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        return irType.hashCode()
-    }
-
-    override fun toString(): String {
-        return irType.renderType()
-    }
-}
-
-internal class KTypeParameterState(val irTypeParameter: IrTypeParameter) : ReflectionState(irTypeParameter) {
-    private var _upperBounds: List<KType>? = null
-
-    fun getUpperBounds(interpreter: IrInterpreter): List<KType> {
-        if (_upperBounds != null) return _upperBounds!!
-        _upperBounds = irTypeParameter.superTypes.map { KTypeProxy(KTypeState(it), interpreter) }
-        return _upperBounds!!
-    }
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (javaClass != other?.javaClass) return false
-
-        other as KTypeParameterState
-
-        if (irTypeParameter != other.irTypeParameter) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        return irTypeParameter.hashCode()
-    }
-
-    override fun toString(): String {
-        return irTypeParameter.name.asString()
-    }
-}
-
-internal class KParameterState(val irType: IrType) : ReflectionState(irType.classifierOrFail) {
-
-}