making LambdaArgument methods nullable

overridden `LambdaArgument.getArgumentExpression` removed because it is already nullable in parent

#EA-117013

compiler/frontend/src/org/jetbrains/kotlin/contracts/EffectsExtractingVisitor.kt

@@ -173,7 +173,7 @@ class EffectsExtractingVisitor(
         valueArgumentsByIndex?.mapTo(arguments) {
             val valueArgument = (it as? ExpressionValueArgument)?.valueArgument ?: return null
             when (valueArgument) {
-                is KtLambdaArgument -> ESLambda(valueArgument.getLambdaExpression())
+                is KtLambdaArgument -> valueArgument.getLambdaExpression()?.let { ESLambda(it) } ?: return null
                 else -> extractOrGetCached(valueArgument.getArgumentExpression() ?: return null)
             }
         } ?: return null

compiler/frontend/src/org/jetbrains/kotlin/psi/KtLambdaArgument.kt

@@ -20,9 +20,7 @@ import com.intellij.lang.ASTNode
 
 class KtLambdaArgument(node: ASTNode) : KtValueArgument(node), LambdaArgument {
 
-    override fun getArgumentExpression() = super.getArgumentExpression()!!
+    override fun getLambdaExpression(): KtLambdaExpression? = getArgumentExpression()?.unpackFunctionLiteral()
-
-    override fun getLambdaExpression(): KtLambdaExpression = getArgumentExpression().unpackFunctionLiteral()!!
 }
 
 fun KtExpression.unpackFunctionLiteral(allowParentheses: Boolean = false): KtLambdaExpression? {

compiler/frontend/src/org/jetbrains/kotlin/psi/ValueArgument.kt

@@ -37,9 +37,7 @@ interface ValueArgument {
 }
 
 interface LambdaArgument : ValueArgument {
-    fun getLambdaExpression(): KtLambdaExpression
+    fun getLambdaExpression(): KtLambdaExpression?
-
-    override fun getArgumentExpression(): KtExpression
 }
 
 interface ValueArgumentName {

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tasks/dynamicCalls.kt

@@ -31,11 +31,8 @@ import org.jetbrains.kotlin.resolve.scopes.MemberScopeImpl
 import org.jetbrains.kotlin.resolve.scopes.receivers.TransientReceiver
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.storage.getValue
-import org.jetbrains.kotlin.types.KotlinType
+import org.jetbrains.kotlin.types.*
-import org.jetbrains.kotlin.types.Variance
-import org.jetbrains.kotlin.types.createDynamicType
 import org.jetbrains.kotlin.types.expressions.OperatorConventions
-import org.jetbrains.kotlin.types.isDynamic
 import org.jetbrains.kotlin.utils.Printer
 import java.util.*
 
@@ -53,7 +50,8 @@ class DynamicCallableDescriptors(storageManager: StorageManager, builtIns: Kotli
         override fun getContributedFunctions(name: Name, location: LookupLocation): Collection<SimpleFunctionDescriptor> {
             if (isAugmentedAssignmentConvention(name)) return listOf()
             if (call.callType == Call.CallType.INVOKE
-                && call.valueArgumentList == null && call.functionLiteralArguments.isEmpty()) {
+                && call.valueArgumentList == null && call.functionLiteralArguments.isEmpty()
+            ) {
                 // this means that we are looking for "imaginary" invokes,
                 // e.g. in `+d` we are looking for property "plus" with member "invoke"
                 return listOf()
@@ -217,7 +215,10 @@ class DynamicCallableDescriptors(storageManager: StorageManager, builtIns: Kotli
 
             if (hasSpreadOperator) {
                 for (funLiteralArg in call.functionLiteralArguments) {
-                    addParameter(funLiteralArg, getFunctionType(funLiteralArg.getLambdaExpression()), null)
+                    addParameter(
+                        funLiteralArg,
+                        funLiteralArg.getLambdaExpression()?.let { getFunctionType(it) } ?: TypeUtils.CANT_INFER_FUNCTION_PARAM_TYPE,
+                        null)
                 }
 
                 break

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tower/PSICallResolver.kt

@@ -462,8 +462,8 @@ class PSICallResolver(
             oldCall.valueArguments.last()
         } else {
             if (externalLambdaArguments.size > 2) {
-                externalLambdaArguments.drop(1).forEach {
+                externalLambdaArguments.drop(1).mapNotNull { it.getLambdaExpression() }.forEach {
-                    context.trace.report(Errors.MANY_LAMBDA_EXPRESSION_ARGUMENTS.on(it.getLambdaExpression()))
+                    context.trace.report(Errors.MANY_LAMBDA_EXPRESSION_ARGUMENTS.on(it))
                 }
             }
 

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/ErrorExpressionGenerator.kt

@@ -50,17 +50,13 @@ class ErrorExpressionGenerator(statementGenerator: StatementGenerator) : Stateme
             receiverExpression.genExpr()
         }
 
-        ktCall.valueArguments.forEach {
+        (ktCall.valueArguments + ktCall.lambdaArguments).forEach {
             val ktArgument = it.getArgumentExpression()
             if (ktArgument != null) {
                 irErrorCall.addArgument(ktArgument.genExpr())
             }
         }
 
-        ktCall.lambdaArguments.forEach {
-            irErrorCall.addArgument(it.getArgumentExpression().genExpr())
-        }
-
         irErrorCall
     }
 

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtInvokeFunctionReference.kt

@@ -76,7 +76,7 @@ class KtInvokeFunctionReference(expression: KtCallExpression) : KtSimpleReferenc
 
         val functionLiteralArguments = expression.lambdaArguments
         for (functionLiteralArgument in functionLiteralArguments) {
-            val functionLiteralExpression = functionLiteralArgument.getArgumentExpression().unpackFunctionLiteral() ?: continue
+            val functionLiteralExpression = functionLiteralArgument.getLambdaExpression() ?: continue
             list.add(getRange(functionLiteralExpression.leftCurlyBrace))
             val rightCurlyBrace = functionLiteralExpression.rightCurlyBrace
             if (rightCurlyBrace != null) {

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

@@ -41,6 +41,7 @@ import org.jetbrains.kotlin.resolve.calls.callUtil.getValueArgumentsInParenthese
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.isError
+import org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments
 import org.jetbrains.kotlin.utils.SmartList
 
 @Suppress("UNCHECKED_CAST")
@@ -56,7 +57,10 @@ inline fun <reified T : PsiElement> PsiElement.replaced(newElement: T): T {
 fun <T : PsiElement> T.copied(): T = copy() as T
 
 fun KtLambdaArgument.moveInsideParentheses(bindingContext: BindingContext): KtCallExpression {
-    return moveInsideParenthesesAndReplaceWith(this.getArgumentExpression(), bindingContext)
+    val ktExpression = this.getArgumentExpression()
+            ?: throw KotlinExceptionWithAttachments("no argument expression for $this")
+                .withAttachment("lambdaExpression", this.text)
+    return moveInsideParenthesesAndReplaceWith(ktExpression, bindingContext)
 }
 
 fun KtLambdaArgument.moveInsideParenthesesAndReplaceWith(

idea/src/org/jetbrains/kotlin/idea/codeInliner/ReplacementPerformer.kt

@@ -29,6 +29,7 @@ import org.jetbrains.kotlin.psi.psiUtil.canPlaceAfterSimpleNameEntry
 import org.jetbrains.kotlin.psi.psiUtil.findDescendantOfType
 import org.jetbrains.kotlin.psi.psiUtil.parentsWithSelf
 import org.jetbrains.kotlin.resolve.bindingContextUtil.isUsedAsExpression
+import org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments
 import java.util.*
 
 internal abstract class ReplacementPerformer<TElement : KtElement>(
@@ -210,7 +211,10 @@ internal class ExpressionReplacementPerformer(
 
         val runExpression = psiFactory.createExpressionByPattern("run { $0 }", elementToBeReplaced) as KtCallExpression
         val runAfterReplacement = elementToBeReplaced.replaced(runExpression)
-        val block = runAfterReplacement.lambdaArguments[0].getLambdaExpression().bodyExpression!!
+        val ktLambdaArgument = runAfterReplacement.lambdaArguments[0]
+        val block = ktLambdaArgument.getLambdaExpression()?.bodyExpression
+                ?: throw KotlinExceptionWithAttachments("cant get body expression for $ktLambdaArgument")
+                    .withAttachment("ktLambdaArgument", ktLambdaArgument.text)
         elementToBeReplaced = block.statements.single()
         return elementToBeReplaced
 

idea/src/org/jetbrains/kotlin/idea/codeInliner/UsageReplacementStrategy.kt

@@ -164,7 +164,7 @@ private fun UsageReplacementStrategy.specialUsageProcessing(usage: KtSimpleNameE
                 val grandParent = usageParent.parent
                 val specifySignature = SpecifyExplicitLambdaSignatureIntention()
                 for (lambdaArgument in lambdaArguments) {
-                    val lambdaExpression = lambdaArgument.getLambdaExpression()
+                    val lambdaExpression = lambdaArgument.getLambdaExpression() ?: continue
                     val functionDescriptor =
                             lambdaExpression.functionLiteral.resolveToDescriptorIfAny() as? FunctionDescriptor ?: continue
                     if (functionDescriptor.valueParameters.isNotEmpty()) {

idea/src/org/jetbrains/kotlin/idea/codeInsight/upDownMover/KotlinExpressionMover.java

@@ -217,7 +217,9 @@ public class KotlinExpressionMover extends AbstractKotlinUpDownMover {
         List<KtLambdaArgument> functionLiterals = callExpression.getLambdaArguments();
         if (functionLiterals.isEmpty()) return null;
 
-        return functionLiterals.get(0).getLambdaExpression().getBodyExpression();
+        KtLambdaExpression lambdaExpression = functionLiterals.get(0).getLambdaExpression();
+        if (lambdaExpression == null) return null;
+        return lambdaExpression.getBodyExpression();
     }
 
     @Nullable

idea/src/org/jetbrains/kotlin/idea/inspections/ScopeFunctionConversionInspection.kt

@@ -72,9 +72,9 @@ private fun getCounterpart(expression: KtCallExpression): String? {
     val callee = expression.calleeExpression as? KtNameReferenceExpression ?: return null
     val calleeName = callee.getReferencedName()
     val counterpartName = counterpartNames[calleeName]
-    val lambdaArgument = expression.lambdaArguments.singleOrNull()
+    val lambdaExpression = expression.lambdaArguments.singleOrNull()?.getLambdaExpression()
-    if (counterpartName != null && lambdaArgument != null) {
+    if (counterpartName != null && lambdaExpression != null) {
-        if (lambdaArgument.getLambdaExpression().valueParameters.isNotEmpty()) {
+        if (lambdaExpression.valueParameters.isNotEmpty()) {
             return null
         }
         val bindingContext = callee.analyze(BodyResolveMode.PARTIAL)
@@ -151,7 +151,7 @@ abstract class ConvertScopeFunctionFix(private val counterpartName: String) : Lo
         val bindingContext = callExpression.analyze()
 
         val lambda = callExpression.lambdaArguments.firstOrNull() ?: return
-        val functionLiteral = lambda.getLambdaExpression().functionLiteral
+        val functionLiteral = lambda.getLambdaExpression()?.functionLiteral ?: return
         val lambdaDescriptor = bindingContext[FUNCTION, functionLiteral] ?: return
 
         val replacements = ReplacementCollection()
@@ -186,13 +186,13 @@ class ConvertScopeFunctionToParameter(counterpartName: String) : ConvertScopeFun
     ) {
         val project = lambda.project
         val factory = KtPsiFactory(project)
-        val functionLiteral = lambda.getLambdaExpression().functionLiteral
+        val functionLiteral = lambda.getLambdaExpression()?.functionLiteral
         val lambdaExtensionReceiver = lambdaDescriptor.extensionReceiverParameter
         val lambdaDispatchReceiver = lambdaDescriptor.dispatchReceiverParameter
 
         var parameterName = "it"
         val scopes = mutableSetOf<LexicalScope>()
-        if (needUniqueNameForParameter(lambda, scopes)) {
+        if (functionLiteral != null && needUniqueNameForParameter(lambda, scopes)) {
             val parameterType = lambdaExtensionReceiver?.type ?: lambdaDispatchReceiver?.type
             parameterName = findUniqueParameterName(parameterType, scopes)
             replacements.createParameter = {

idea/src/org/jetbrains/kotlin/idea/inspections/collections/SimplifyCallChainFix.kt

@@ -47,16 +47,16 @@ class SimplifyCallChainFix(val newName: String) : LocalQuickFix {
             val lastArgumentPrefix = if (newName.startsWith("joinTo")) "transform = " else ""
             val arguments = secondCallExpression.valueArgumentList?.arguments.orEmpty().map { it.text } +
                             firstCallExpression.valueArgumentList?.arguments.orEmpty().map { "$lastArgumentPrefix${it.text}" }
-            val lambdaArgument = firstCallExpression.lambdaArguments.singleOrNull()
+            val lambdaExpression = firstCallExpression.lambdaArguments.singleOrNull()?.getLambdaExpression()
 
             val argumentsText = arguments.ifNotEmpty { joinToString(prefix = "(", postfix = ")") } ?: ""
-            val newQualifiedExpression = if (lambdaArgument != null) factory.createExpressionByPattern(
+            val newQualifiedExpression = if (lambdaExpression != null) factory.createExpressionByPattern(
-                    "$0$1$2 $3 $4",
+                "$0$1$2 $3 $4",
-                    receiverExpression ?: "",
+                receiverExpression ?: "",
-                    operationSign,
+                operationSign,
-                    newName,
+                newName,
-                    argumentsText,
+                argumentsText,
-                    lambdaArgument.getLambdaExpression().text
+                lambdaExpression.text
             )
             else factory.createExpressionByPattern(
                     "$0$1$2 $3",

idea/src/org/jetbrains/kotlin/idea/intentions/ConvertTryFinallyToUseCallIntention.kt

@@ -76,7 +76,7 @@ class ConvertTryFinallyToUseCallIntention : SelfTargetingRangeIntention<KtTryExp
             else -> return
         }
         val lambda = call.lambdaArguments.firstOrNull() ?: return
-        val lambdaParameter = lambda.getLambdaExpression().valueParameters.firstOrNull() ?: return
+        val lambdaParameter = lambda.getLambdaExpression()?.valueParameters?.firstOrNull() ?: return
         editor?.selectionModel?.setSelection(lambdaParameter.startOffset, lambdaParameter.endOffset)
     }
 

idea/src/org/jetbrains/kotlin/idea/intentions/MoveLambdaInsideParenthesesIntention.kt

@@ -22,13 +22,12 @@ import org.jetbrains.kotlin.idea.caches.resolve.analyze
 import org.jetbrains.kotlin.idea.core.moveInsideParentheses
 import org.jetbrains.kotlin.psi.KtLambdaArgument
 import org.jetbrains.kotlin.psi.psiUtil.containsInside
-import org.jetbrains.kotlin.psi.unpackFunctionLiteral
 
 class MoveLambdaInsideParenthesesIntention : SelfTargetingIntention<KtLambdaArgument>(
     KtLambdaArgument::class.java, "Move lambda argument into parentheses"
 ), LowPriorityAction {
     override fun isApplicableTo(element: KtLambdaArgument, caretOffset: Int): Boolean {
-        val body = element.getArgumentExpression().unpackFunctionLiteral()?.bodyExpression ?: return true
+        val body = element.getLambdaExpression()?.bodyExpression ?: return true
         return !body.textRange.containsInside(caretOffset)
     }
 

idea/src/org/jetbrains/kotlin/idea/intentions/ObjectLiteralToLambdaIntention.kt

@@ -145,7 +145,7 @@ class ObjectLiteralToLambdaIntention : SelfTargetingRangeIntention<KtObjectLiter
 
         val callee = replaced.getCalleeExpressionIfAny()!! as KtNameReferenceExpression
         val callExpression = callee.parent as KtCallExpression
-        val functionLiteral = callExpression.lambdaArguments.single().getLambdaExpression()
+        val functionLiteral = callExpression.lambdaArguments.single().getLambdaExpression()!!
 
         val returnLabel = callee.getReferencedNameAsName()
         returnSaver.restore(functionLiteral, returnLabel)

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/extractionEngine/ExtractableCodeDescriptor.kt

@@ -101,7 +101,7 @@ abstract class WrapInWithReplacement : Replacement {
         val call = (e as? KtSimpleNameExpression)?.getQualifiedElement() ?: return e
         val replacingExpression = KtPsiFactory(e).createExpressionByPattern("with($0) { $1 }", argumentText, call)
         val replace = call.replace(replacingExpression)
-        return (replace as KtCallExpression).lambdaArguments.first().getLambdaExpression().bodyExpression!!.statements.first()
+        return (replace as KtCallExpression).lambdaArguments.first().getLambdaExpression()!!.bodyExpression!!.statements.first()
     }
 }
 

plugins/uast-kotlin/src/org/jetbrains/uast/kotlin/KotlinUastLanguagePlugin.kt

@@ -328,7 +328,7 @@ internal object KotlinConverter {
                 }
 
             is KtExpression -> KotlinConverter.convertExpression(element, givenParent, requiredType)
-            is KtLambdaArgument -> KotlinConverter.convertExpression(element.getLambdaExpression(), givenParent, requiredType)
+            is KtLambdaArgument -> element.getLambdaExpression()?.let { KotlinConverter.convertExpression(it, givenParent, requiredType) }
             is KtLightAnnotationForSourceEntry.LightExpressionValue<*> -> {
                 val expression = element.originalExpression
                 when (expression) {