Cleanup: post-cleanup after deprecation cleanup in compiler

Replace `takeIf { !expr }` with `takeUnless { expr }`.
Cleanup redundant parethesis as in `listOf((expr))`.
Replace `listOf(expr)` with `expr.let(::listOf)` where the former caused significant indentation change.

compiler/backend/src/org/jetbrains/kotlin/codegen/builtinSpecialBridges.kt

@@ -63,8 +63,7 @@ object BuiltinSpecialBridgesUtil {
 
         val specialBridgeExists = function.getSpecialBridgeSignatureIfExists(signatureByDescriptor) != null
         val specialBridgesSignaturesInSuperClass = function.overriddenTreeAsSequence(useOriginal = true).mapNotNull {
-            if (it === function) return@mapNotNull null
-            it.getSpecialBridgeSignatureIfExists(signatureByDescriptor)
+            it.takeUnless { it === function }?.getSpecialBridgeSignatureIfExists(signatureByDescriptor)
         }
         val isTherePossibleClashWithSpecialBridge =
                 specialBridgeSignature in specialBridgesSignaturesInSuperClass

compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineCodegen.kt

@@ -288,7 +288,7 @@ class CoroutineCodegen private constructor(
     }
 
     private fun allFunctionParameters() =
-            listOfNotNull(originalSuspendFunctionDescriptor.extensionReceiverParameter) +
+            originalSuspendFunctionDescriptor.extensionReceiverParameter.let(::listOfNotNull) +
             originalSuspendFunctionDescriptor.valueParameters.orEmpty()
 
     private fun ParameterDescriptor.getFieldInfoForCoroutineLambdaParameter() =

compiler/daemon/daemon-client/src/org/jetbrains/kotlin/daemon/client/KotlinCompilerClient.kt

@@ -61,7 +61,7 @@ object KotlinCompilerClient {
     ): CompileService? {
         val flagFile = System.getProperty(COMPILE_DAEMON_CLIENT_ALIVE_PATH_PROPERTY)
                                ?.let(String::trimQuotes)
-                               ?.takeIf { !it.isBlank() }
+                               ?.takeUnless(String::isBlank)
                                ?.let(::File)
                                ?.takeIf(File::exists)
                                ?: makeAutodeletingFlagFile(baseDir = File(daemonOptions.runFilesPathOrDefault))

compiler/frontend.java/src/org/jetbrains/kotlin/load/java/sam/SingleAbstractMethodUtils.kt

@@ -42,8 +42,8 @@ internal fun nonProjectionParametrization(samType: SimpleType): SimpleType? {
                     projection.projectionKind == Variance.INVARIANT -> projection
 
                     projection.isStarProjection ->
-                        parameter.upperBounds.first().takeIf {
-                            t -> !t.contains { it.constructor.declarationDescriptor in parametersSet }
+                        parameter.upperBounds.first().takeUnless {
+                            t -> t.contains { it.constructor.declarationDescriptor in parametersSet }
                         }?.asTypeProjection() ?: return@nonProjectionParametrization null
 
                     else -> projection.type.asTypeProjection()

compiler/frontend/src/org/jetbrains/kotlin/resolve/QualifiedExpressionResolver.kt

@@ -417,12 +417,12 @@ class QualifiedExpressionResolver {
         val qualifierDescriptor = when (receiver) {
             is PackageQualifier -> {
                 val childPackageFQN = receiver.descriptor.fqName.child(name)
-                receiver.descriptor.module.getPackage(childPackageFQN).takeIf { !it.isEmpty() } ?:
+                receiver.descriptor.module.getPackage(childPackageFQN).takeUnless { it.isEmpty() } ?:
                 receiver.descriptor.memberScope.getContributedClassifier(name, location)
             }
             is ClassQualifier -> receiver.staticScope.getContributedClassifier(name, location)
             null -> context.scope.findClassifier(name, location) ?:
-                    context.scope.ownerDescriptor.module.getPackage(FqName.ROOT.child(name)).takeIf { !it.isEmpty() }
+                    context.scope.ownerDescriptor.module.getPackage(FqName.ROOT.child(name)).takeUnless { it.isEmpty() }
             is ReceiverValue -> receiver.type.memberScope.memberScopeAsImportingScope().findClassifier(name, location)
             else -> null
         }

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/DefaultImportProvider.kt

@@ -55,7 +55,7 @@ class DefaultImportProvider(
                 defaultImports
                         .filter { it.isAllUnder }
                         .mapNotNull {
-                            it.fqName.takeIf { !it.isSubpackageOf(KotlinBuiltIns.BUILT_INS_PACKAGE_FQ_NAME) }
+                            it.fqName.takeUnless { it.isSubpackageOf(KotlinBuiltIns.BUILT_INS_PACKAGE_FQ_NAME) }
                         }
         val nonKotlinAliasedTypeFqNames =
                 builtinTypeAliases

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/EnumClassLowering.kt

@@ -167,8 +167,8 @@ class EnumClassLowering(val context: JvmBackendContext) : ClassLoweringPass {
         private fun lowerEnumEntries() {
             irClass.declarations.transformFlat { declaration ->
                 if (declaration is IrEnumEntry) {
-                    listOf(createFieldForEnumEntry(declaration)) +
-                    listOfNotNull(lowerEnumEntryClass(declaration.correspondingClass))
+                    listOfNotNull(createFieldForEnumEntry(declaration),
+                                  lowerEnumEntryClass(declaration.correspondingClass))
                 }
                 else null
             }

compiler/light-classes/src/org/jetbrains/kotlin/asJava/lightClassUtils.kt

@@ -50,12 +50,10 @@ fun KtElement.toLightElements(): List<PsiNamedElement> =
             is KtSecondaryConstructor -> LightClassUtil.getLightClassMethods(this as KtFunction)
             is KtProperty -> LightClassUtil.getLightClassPropertyMethods(this).allDeclarations
             is KtPropertyAccessor -> listOfNotNull(LightClassUtil.getLightClassAccessorMethod(this))
-            is KtParameter -> ArrayList<PsiNamedElement>().let { elements ->
+            is KtParameter -> mutableListOf<PsiNamedElement>().also { elements ->
                 toPsiParameters().toCollection(elements)
                 LightClassUtil.getLightClassPropertyMethods(this).toCollection(elements)
-                toAnnotationLightMethod()?.let { elements.add(it) }
-
-                elements
+                toAnnotationLightMethod()?.let(elements::add)
             }
             is KtTypeParameter -> toPsiTypeParameters()
             is KtFile -> listOfNotNull(findFacadeClass())

compiler/tests/org/jetbrains/kotlin/scripts/ScriptTemplateTest.kt

@@ -334,12 +334,10 @@ class TestKotlinScriptDependenciesResolver : TestKotlinScriptDummyDependenciesRe
             when (it) {
                 is DependsOn -> if (it.path == "@{runtime}") listOf(kotlinPaths.runtimePath, kotlinPaths.scriptRuntimePath) else listOf(File(it.path))
                 is DependsOnTwo -> listOf(it.path1, it.path2).flatMap {
-                    it.let {
-                        when {
-                            it.isBlank() -> emptyList()
-                            it == "@{runtime}" -> listOf(kotlinPaths.runtimePath, kotlinPaths.scriptRuntimePath)
-                            else -> listOf(File(it))
-                        }
+                    when {
+                        it.isBlank() -> emptyList()
+                        it == "@{runtime}" -> listOf(kotlinPaths.runtimePath, kotlinPaths.scriptRuntimePath)
+                        else -> listOf(File(it))
                     }
                 }
                 is InvalidScriptResolverAnnotation -> throw Exception("Invalid annotation ${it.name}", it.error)

compiler/util/src/org/jetbrains/kotlin/utils/reflectionUtil.kt

@@ -183,7 +183,7 @@ private class StringArgsConverter : ArgsConverter<String> {
                     DoubleArray::class -> args.map { it?.toDoubleOrNull() }
                     BooleanArray::class -> args.map { it?.toBoolean() }
                     else -> null
-                }?.toList()?.takeIf { list -> list.none { it == null } }?.toTypedArray()
+                }?.toList()?.takeUnless { null in it }?.toTypedArray()
 
         val parameterType = parameter.type
         if (parameterType.jvmErasure.java.isArray) {

core/descriptors/src/org/jetbrains/kotlin/builtins/functionTypes.kt

@@ -166,7 +166,7 @@ fun getFunctionTypeArgumentProjections(
     arguments.addIfNotNull(receiverType?.asTypeProjection())
 
     parameterTypes.mapIndexedTo(arguments) { index, type ->
-        val name = parameterNames?.get(index)?.takeIf { !it.isSpecial }
+        val name = parameterNames?.get(index)?.takeUnless { it.isSpecial }
         val typeToUse = if (name != null) {
             val annotationClass = builtIns.getBuiltInClassByName(KotlinBuiltIns.FQ_NAMES.parameterName.shortName())
             val nameValue = ConstantValueFactory(builtIns).createStringValue(name.asString())

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

@@ -33,4 +33,4 @@ interface VariableDescriptorWithAccessors : VariableDescriptor {
 }
 
 val VariableDescriptorWithAccessors.accessors: List<VariableAccessorDescriptor>
-    get() = listOfNotNull(getter) + listOfNotNull(setter)
+    get() = listOfNotNull(getter, setter)

idea/ide-common/src/org/jetbrains/kotlin/idea/util/FuzzyType.kt

@@ -181,7 +181,7 @@ class FuzzyType(
                         valueTransform = {
                             val typeProjection = TypeProjectionImpl(Variance.INVARIANT, it.defaultType)
                             val substitutedProjection = substitutorToKeepCapturedTypes.substitute(typeProjection)
-                            substitutedProjection?.takeIf { !ErrorUtils.containsUninferredParameter(it.type) } ?: typeProjection
+                            substitutedProjection?.takeUnless { ErrorUtils.containsUninferredParameter(it.type) } ?: typeProjection
                         })
         return TypeConstructorSubstitution.createByConstructorsMap(substitutionMap, approximateCapturedTypes = true).buildSubstitutor()
     }

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/StaticMembersCompletion.kt

@@ -51,11 +51,11 @@ class StaticMembersCompletion(
         return object : AbstractLookupElementFactory {
             override fun createStandardLookupElementsForDescriptor(descriptor: DeclarationDescriptor, useReceiverTypes: Boolean): Collection<LookupElement> {
                 if (!useReceiverTypes) return emptyList()
-                return listOfNotNull(lookupElementFactory.createLookupElement(descriptor, useReceiverTypes = false)
-                                             .decorateAsStaticMember(descriptor, classNameAsLookupString = false)
-                                             ?.assignPriority(itemPriority)
-                                             ?.suppressAutoInsertion()
-                )
+                return lookupElementFactory.createLookupElement(descriptor, useReceiverTypes = false)
+                        .decorateAsStaticMember(descriptor, classNameAsLookupString = false)
+                        ?.assignPriority(itemPriority)
+                        ?.suppressAutoInsertion()
+                        .let(::listOfNotNull)
             }
 
             override fun createLookupElement(descriptor: DeclarationDescriptor, useReceiverTypes: Boolean,

idea/idea-core/src/org/jetbrains/kotlin/idea/core/ExpectedInfos.kt

@@ -588,7 +588,7 @@ class ExpectedInfos(
 
         val loopVar = forExpression.loopParameter
         val loopVarType = if (loopVar != null && loopVar.typeReference != null)
-            (bindingContext[BindingContext.DECLARATION_TO_DESCRIPTOR, loopVar] as VariableDescriptor).type.takeIf { !it.isError }
+            (bindingContext[BindingContext.DECLARATION_TO_DESCRIPTOR, loopVar] as VariableDescriptor).type.takeUnless { it.isError }
         else
             null
 

idea/idea-core/src/org/jetbrains/kotlin/idea/core/KotlinIndicesHelper.kt

@@ -478,7 +478,7 @@ class KotlinIndicesHelper(
             val translatedDeclaration = declarationTranslator(this) ?: return emptyList()
             if (!psiFilter(translatedDeclaration)) return emptyList()
 
-            return listOfNotNull((resolutionFacade.resolveToDescriptor(translatedDeclaration)))
+            return listOfNotNull(resolutionFacade.resolveToDescriptor(translatedDeclaration))
         }
     }
 }

idea/src/org/jetbrains/kotlin/idea/debugger/evaluate/KotlinCodeFragmentFactory.kt

@@ -322,7 +322,7 @@ class KotlinCodeFragmentFactory: CodeFragmentFactory() {
             return containingFile
         }
 
-        private fun KtElement?.check(): Boolean = this != null && this.takeIf { KotlinEditorTextProvider.isAcceptedAsCodeFragmentContext(it) } != null
+        private fun KtElement?.check(): Boolean = this != null && KotlinEditorTextProvider.isAcceptedAsCodeFragmentContext(this)
 
         //internal for tests
         fun createCodeFragmentForLabeledObjects(project: Project, markupMap: Map<*, ValueMarkup>): Pair<String, Map<String, Value>> {
@@ -397,7 +397,7 @@ class KotlinCodeFragmentFactory: CodeFragmentFactory() {
 
         val sb = StringBuilder()
 
-        javaFile?.packageName?.takeIf { !it.isBlank() }?.let {
+        javaFile?.packageName?.takeUnless { it.isBlank() }?.let {
             sb.append("package ").append(it.quoteIfNeeded()).append("\n")
         }
 

idea/src/org/jetbrains/kotlin/idea/quickfix/ChangeCallableReturnTypeFix.kt

@@ -75,7 +75,7 @@ abstract class ChangeCallableReturnTypeFix(
         val name = element.name
         if (name != null) {
             val container = element.resolveToDescriptor().containingDeclaration as? ClassDescriptor
-            val containerName = container?.name?.takeIf { !it.isSpecial }?.asString()
+            val containerName = container?.name?.takeUnless { it.isSpecial }?.asString()
             val fullName = if (containerName != null) "'$containerName.$name'" else "'$name'"
             if (element is KtParameter) {
                 return "property $fullName"

idea/src/org/jetbrains/kotlin/idea/quickfix/ChangeVariableTypeFix.kt

@@ -50,7 +50,7 @@ open class ChangeVariableTypeFix(element: KtVariableDeclaration, type: KotlinTyp
         val name = element.name
         if (name != null) {
             val container = element.resolveToDescriptor().containingDeclaration as? ClassDescriptor
-            val containerName = container?.name?.takeIf { !it.isSpecial }?.asString()
+            val containerName = container?.name?.takeUnless { it.isSpecial }?.asString()
             return if (containerName != null) "'$containerName.$name'" else "'$name'"
         }
         else {

idea/src/org/jetbrains/kotlin/idea/quickfix/ImportFix.kt

@@ -488,8 +488,8 @@ internal class ImportForMismatchingArgumentsFix(
         return callExpression.valueArguments +
                callExpression.valueArguments.mapNotNull { it.getArgumentExpression() } +
                callExpression.valueArguments.mapNotNull { it.getArgumentName()?.referenceExpression } +
-               listOfNotNull(callExpression.valueArgumentList) +
-               listOfNotNull(callExpression.referenceExpression())
+               listOfNotNull(callExpression.valueArgumentList,
+                             callExpression.referenceExpression())
     }
 
     override fun fillCandidates(

idea/src/org/jetbrains/kotlin/idea/quickfix/KotlinIntentionActionFactoryWithDelegate.kt

@@ -37,11 +37,11 @@ abstract class KotlinSingleIntentionActionFactoryWithDelegate<E : KtElement, D :
             diagnostic: Diagnostic,
             quickFixDataFactory: () -> D?
     ): List<QuickFixWithDelegateFactory> {
-        return listOf(QuickFixWithDelegateFactory(actionPriority) factory@ {
+        return QuickFixWithDelegateFactory(actionPriority) factory@ {
             val originalElement = originalElementPointer.element ?: return@factory null
             val data = quickFixDataFactory() ?: return@factory null
             createFix(originalElement, data)
-        })
+        }.let(::listOf)
     }
 }
 

idea/src/org/jetbrains/kotlin/idea/quickfix/createFromUsage/createClass/CreateClassFromCallWithConstructorCalleeActionFactory.kt

@@ -45,7 +45,7 @@ object CreateClassFromCallWithConstructorCalleeActionFactory : CreateClassFromUs
     }
 
     override fun getPossibleClassKinds(element: KtCallElement, diagnostic: Diagnostic): List<ClassKind> {
-        return listOf((if (element is KtAnnotationEntry) ClassKind.ANNOTATION_CLASS else ClassKind.PLAIN_CLASS))
+        return listOf(if (element is KtAnnotationEntry) ClassKind.ANNOTATION_CLASS else ClassKind.PLAIN_CLASS)
     }
 
     override fun extractFixData(element: KtCallElement, diagnostic: Diagnostic): ClassInfo? {

idea/src/org/jetbrains/kotlin/idea/quickfix/createFromUsage/createTypeParameter/CreateTypeParameterUnmatchedTypeArgumentActionFactory.kt

@@ -76,10 +76,10 @@ object CreateTypeParameterUnmatchedTypeArgumentActionFactory : KotlinIntentionAc
             diagnostic: Diagnostic,
             quickFixDataFactory: () -> CreateTypeParameterData?
     ): List<QuickFixWithDelegateFactory> {
-        return listOf(QuickFixWithDelegateFactory factory@ {
+        return QuickFixWithDelegateFactory factory@ {
             val originalElement = originalElementPointer.element ?: return@factory null
             val data = quickFixDataFactory() ?: return@factory null
             CreateTypeParameterFromUsageFix(originalElement, data, false)
-        })
+        }.let(::listOf)
     }
 }

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceVariable/KotlinIntroduceVariableHandler.kt

@@ -561,11 +561,11 @@ object KotlinIntroduceVariableHandler : RefactoringActionHandler {
                     componentFunctions.map { suggestNamesForComponent(it, project, collectingValidator) }
                 }
                 else {
-                    listOf(KotlinNameSuggester.suggestNamesByExpressionAndType(expression,
-                                                                               substringInfo?.type,
-                                                                               bindingContext,
-                                                                               validator,
-                                                                               "value"))
+                    KotlinNameSuggester.suggestNamesByExpressionAndType(expression,
+                                                                        substringInfo?.type,
+                                                                        bindingContext,
+                                                                        validator,
+                                                                        "value").let(::listOf)
                 }
 
                 val introduceVariableContext = IntroduceVariableContext(