Change Signature: Support implicit calls of 'invoke' and 'get'

Also drop 'operator' keyword when necessary

 #KT-22718 Fixed

idea/src/org/jetbrains/kotlin/idea/refactoring/changeSignature/KotlinChangeSignatureUsageProcessor.kt

@@ -47,6 +47,8 @@ import org.jetbrains.kotlin.idea.core.compareDescriptors
 import org.jetbrains.kotlin.idea.refactoring.*
 import org.jetbrains.kotlin.idea.refactoring.changeSignature.usages.*
 import org.jetbrains.kotlin.idea.refactoring.rename.noReceivers
+import org.jetbrains.kotlin.idea.references.KtArrayAccessReference
+import org.jetbrains.kotlin.idea.references.KtInvokeFunctionReference
 import org.jetbrains.kotlin.idea.references.KtSimpleNameReference
 import org.jetbrains.kotlin.idea.references.mainReference
 import org.jetbrains.kotlin.idea.search.ideaExtensions.KotlinReferencesSearchOptions
@@ -227,24 +229,30 @@ class KotlinChangeSignatureUsageProcessor : ChangeSignatureUsageProcessor {
         val functionPsi = functionUsageInfo.element ?: return
 
         for (reference in findReferences(functionPsi)) {
-            val element = reference.element
+            val element = reference.element ?: continue
 
-            if (element is KtReferenceExpression) {
-                var parent = element.parent
+            when {
+                reference is KtInvokeFunctionReference || reference is KtArrayAccessReference -> {
+                    result.add(KotlinByConventionCallUsage(element as KtExpression, functionUsageInfo))
+                }
 
-                when {
-                    parent is KtCallExpression ->
-                        result.add(KotlinFunctionCallUsage(parent, functionUsageInfo))
+                element is KtReferenceExpression -> {
+                    var parent = element.parent
 
-                    parent is KtUserType && parent.parent is KtTypeReference -> {
-                        parent = parent.parent.parent
+                    when {
+                        parent is KtCallExpression ->
+                            result.add(KotlinFunctionCallUsage(parent, functionUsageInfo))
 
-                        if (parent is KtConstructorCalleeExpression && parent.parent is KtSuperTypeCallEntry)
-                            result.add(KotlinFunctionCallUsage(parent.parent as KtSuperTypeCallEntry, functionUsageInfo))
+                        parent is KtUserType && parent.parent is KtTypeReference -> {
+                            parent = parent.parent.parent
+
+                            if (parent is KtConstructorCalleeExpression && parent.parent is KtSuperTypeCallEntry)
+                                result.add(KotlinFunctionCallUsage(parent.parent as KtSuperTypeCallEntry, functionUsageInfo))
+                        }
+
+                        element is KtSimpleNameExpression && (functionPsi is KtProperty || functionPsi is KtParameter) ->
+                            result.add(KotlinPropertyCallUsage(element))
                     }
-
-                    element is KtSimpleNameExpression && (functionPsi is KtProperty || functionPsi is KtParameter) ->
-                        result.add(KotlinPropertyCallUsage(element))
                 }
             }
         }
@@ -660,16 +668,20 @@ class KotlinChangeSignatureUsageProcessor : ChangeSignatureUsageProcessor {
     ) {
         if (originalReceiverInfo != null) return
 
-        for (usageInfo in usages) {
-            if (!(usageInfo is KotlinFunctionCallUsage || usageInfo is KotlinPropertyCallUsage)) continue
+        loop@ for (usageInfo in usages) {
+            if (!(usageInfo is KotlinFunctionCallUsage || usageInfo is KotlinPropertyCallUsage || usageInfo is KotlinByConventionCallUsage)) continue
 
             val callElement = usageInfo.element as? KtElement ?: continue
-
             val parent = callElement.parent
-            if (parent is KtQualifiedExpression && parent.selectorExpression === callElement) {
-                val message = "Explicit receiver is already present in call element: " + CommonRefactoringUtil.htmlEmphasize(parent.text)
-                result.putValue(callElement, message)
+
+            val elementToReport = when {
+                usageInfo is KotlinByConventionCallUsage -> callElement
+                parent is KtQualifiedExpression && parent.selectorExpression === callElement -> parent
+                else -> continue@loop
             }
+
+            val message = "Explicit receiver is already present in call element: " + CommonRefactoringUtil.htmlEmphasize(elementToReport.text)
+            result.putValue(callElement, message)
         }
     }
 
@@ -851,6 +863,10 @@ class KotlinChangeSignatureUsageProcessor : ChangeSignatureUsageProcessor {
         }
 
         if (beforeMethodChange) {
+            if (usageInfo is KotlinUsageInfo<*>) {
+                usageInfo.preprocessUsage()
+            }
+
             if (method !is PsiMethod || initializedOriginalDescriptor) return false
 
             val descriptorWrapper = usages.firstIsInstanceOrNull<OriginalJavaMethodDescriptorWrapper>()

idea/src/org/jetbrains/kotlin/idea/refactoring/changeSignature/usages/KotlinByConventionCallUsage.kt

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2000-2018 JetBrains s.r.o. 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.idea.refactoring.changeSignature.usages
+
+import com.intellij.usageView.UsageInfo
+import org.jetbrains.kotlin.idea.caches.resolve.analyze
+import org.jetbrains.kotlin.idea.inspections.conventionNameCalls.ReplaceGetOrSetInspection
+import org.jetbrains.kotlin.idea.intentions.OperatorToFunctionIntention
+import org.jetbrains.kotlin.idea.intentions.conventionNameCalls.ReplaceInvokeIntention
+import org.jetbrains.kotlin.idea.refactoring.changeSignature.KotlinChangeInfo
+import org.jetbrains.kotlin.psi.KtCallExpression
+import org.jetbrains.kotlin.psi.KtDotQualifiedExpression
+import org.jetbrains.kotlin.psi.KtExpression
+import org.jetbrains.kotlin.psi.psiUtil.getPossiblyQualifiedCallExpression
+import org.jetbrains.kotlin.psi.psiUtil.getQualifiedExpressionForSelectorOrThis
+import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
+import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
+import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
+import org.jetbrains.kotlin.util.OperatorNameConventions
+
+class KotlinByConventionCallUsage(
+    expression: KtExpression,
+    private val callee: KotlinCallableDefinitionUsage<*>
+) : KotlinUsageInfo<KtExpression>(expression) {
+    private var resolvedCall: ResolvedCall<*>? = null
+    private var convertedCallExpression: KtCallExpression? = null
+
+    private fun foldExpression(expression: KtDotQualifiedExpression, changeInfo: KotlinChangeInfo) {
+        when (changeInfo.newName) {
+            OperatorNameConventions.INVOKE.asString() -> {
+                with(ReplaceInvokeIntention()) {
+                    if (applicabilityRange(expression) != null) {
+                        applyTo(expression, null)
+                    }
+                }
+            }
+
+            OperatorNameConventions.GET.asString() -> {
+                with(ReplaceGetOrSetInspection()) {
+                    if (isApplicable(expression)) {
+                        applyTo(expression)
+                    }
+                }
+            }
+        }
+    }
+
+    override fun getElement(): KtExpression? {
+        return convertedCallExpression ?: super.getElement()
+    }
+
+    override fun preprocessUsage() {
+        val element = element ?: return
+        val convertedExpression = OperatorToFunctionIntention.convert(element).first
+        val callExpression = convertedExpression.getPossiblyQualifiedCallExpression() ?: return
+        resolvedCall = callExpression.getResolvedCall(callExpression.analyze(BodyResolveMode.PARTIAL))
+        convertedCallExpression = callExpression
+    }
+
+    override fun processUsage(changeInfo: KotlinChangeInfo, element: KtExpression, allUsages: Array<out UsageInfo>): Boolean {
+        val resolvedCall = resolvedCall ?: return true
+        val callExpression = convertedCallExpression ?: return true
+        val callProcessor = KotlinFunctionCallUsage(callExpression, callee, resolvedCall)
+        val newExpression = callProcessor.processUsageAndGetResult(changeInfo, callExpression, allUsages) as? KtExpression
+        val qualifiedCall = newExpression?.getQualifiedExpressionForSelectorOrThis() as? KtDotQualifiedExpression
+        if (qualifiedCall != null) {
+            foldExpression(qualifiedCall, changeInfo)
+        }
+        return true
+    }
+}

idea/src/org/jetbrains/kotlin/idea/refactoring/changeSignature/usages/KotlinCallableDefinitionUsage.kt

@@ -33,6 +33,7 @@ import org.jetbrains.kotlin.idea.refactoring.replaceListPsiAndKeepDelimiters
 import org.jetbrains.kotlin.idea.core.ShortenReferences
 import org.jetbrains.kotlin.idea.core.ShortenReferences.Options
 import org.jetbrains.kotlin.idea.refactoring.changeSignature.*
+import org.jetbrains.kotlin.idea.refactoring.dropOperatorKeywordIfNecessary
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getElementTextWithContext
@@ -140,6 +141,7 @@ class KotlinCallableDefinitionUsage<T : PsiElement>(
         if (canDropOverride) {
             dropOverrideKeywordIfNecessary(element)
         }
+        dropOperatorKeywordIfNecessary(element)
 
         return true
     }

idea/src/org/jetbrains/kotlin/idea/refactoring/changeSignature/usages/KotlinFunctionCallUsage.kt

@@ -56,19 +56,28 @@ import java.util.*
 
 class KotlinFunctionCallUsage(
         element: KtCallElement,
-        private val callee: KotlinCallableDefinitionUsage<*>
+        private val callee: KotlinCallableDefinitionUsage<*>,
+        forcedResolvedCall: ResolvedCall<*>? = null
 ) : KotlinUsageInfo<KtCallElement>(element) {
     private val context = element.analyze(BodyResolveMode.FULL)
-    private val resolvedCall = element.getResolvedCall(context)
+    private val resolvedCall = forcedResolvedCall ?: element.getResolvedCall(context)
+    private val skipUnmatchedArgumentsCheck = forcedResolvedCall != null
 
     override fun processUsage(changeInfo: KotlinChangeInfo, element: KtCallElement, allUsages: Array<out UsageInfo>): Boolean {
-        if (shouldSkipUsage(element)) return true
+        processUsageAndGetResult(changeInfo, element, allUsages)
+        return true
+    }
+
+    fun processUsageAndGetResult(changeInfo: KotlinChangeInfo, element: KtCallElement, allUsages: Array<out UsageInfo>): KtElement {
+        if (shouldSkipUsage(element)) return element
+
+        var result: KtElement = element
 
         changeNameIfNeeded(changeInfo, element)
 
         if (element.valueArgumentList != null) {
             if (changeInfo.isParameterSetOrOrderChanged) {
-                updateArgumentsAndReceiver(changeInfo, element, allUsages)
+                result = updateArgumentsAndReceiver(changeInfo, element, allUsages)
             }
             else {
                 changeArgumentNames(changeInfo, element)
@@ -83,7 +92,7 @@ class KotlinFunctionCallUsage(
             }
         }
 
-        return true
+        return result
     }
 
     private fun shouldSkipUsage(element: KtCallElement): Boolean {
@@ -94,6 +103,8 @@ class KotlinFunctionCallUsage(
         // TODO: investigate why arguments are not recorded for enum constructor call
         if (element is KtSuperTypeCallEntry && element.parent.parent is KtEnumEntry) return false
 
+        if (skipUnmatchedArgumentsCheck) return false
+
         if (!resolvedCall.call.valueArguments.all{ resolvedCall.getArgumentMapping(it) is ArgumentMatch }) return true
 
         val arguments = resolvedCall.valueArguments
@@ -305,7 +316,7 @@ class KotlinFunctionCallUsage(
         }
     }
 
-    private fun updateArgumentsAndReceiver(changeInfo: KotlinChangeInfo, element: KtCallElement, allUsages: Array<out UsageInfo>) {
+    private fun updateArgumentsAndReceiver(changeInfo: KotlinChangeInfo, element: KtCallElement, allUsages: Array<out UsageInfo>): KtElement {
         if (isPropertyJavaUsage) return updateJavaPropertyCall(changeInfo, element)
 
         val fullCallElement = element.getQualifiedExpressionForSelector() ?: element
@@ -322,7 +333,7 @@ class KotlinFunctionCallUsage(
         val dispatchReceiver = resolvedCall?.dispatchReceiver
 
         // Do not add extension receiver to calls with explicit dispatch receiver
-        if (newReceiverInfo != null && fullCallElement is KtQualifiedExpression && dispatchReceiver is ExpressionReceiver) return
+        if (newReceiverInfo != null && fullCallElement is KtQualifiedExpression && dispatchReceiver is ExpressionReceiver) return element
 
         val newArgumentInfos = newParameters.withIndex().map {
             val (index, param) = it
@@ -386,7 +397,7 @@ class KotlinFunctionCallUsage(
                         if (it is KtValueArgument) addArgument(it)
                     }
 
-                    else -> return
+                    else -> return element
                 }
             }
         }
@@ -456,6 +467,8 @@ class KotlinFunctionCallUsage(
             val newCallExpression = ((newElement as? KtQualifiedExpression)?.selectorExpression ?: newElement) as KtCallExpression
             newCallExpression.moveFunctionLiteralOutsideParentheses()
         }
+
+        return newElement
     }
 
     private fun changeArgumentNames(changeInfo: KotlinChangeInfo, element: KtCallElement) {
@@ -488,10 +501,10 @@ class KotlinFunctionCallUsage(
 
         private val SHORTEN_ARGUMENTS_OPTIONS = ShortenReferences.Options(true, true)
 
-        private fun updateJavaPropertyCall(changeInfo: KotlinChangeInfo, element: KtCallElement) {
+        private fun updateJavaPropertyCall(changeInfo: KotlinChangeInfo, element: KtCallElement): KtElement {
             val newReceiverInfo = changeInfo.receiverParameterInfo
             val originalReceiverInfo = changeInfo.methodDescriptor.receiver
-            if (newReceiverInfo == originalReceiverInfo) return
+            if (newReceiverInfo == originalReceiverInfo) return element
 
             val arguments = element.valueArgumentList.sure { "Argument list is expected: " + element.text }
             val oldArguments = element.valueArguments
@@ -515,6 +528,8 @@ class KotlinFunctionCallUsage(
 
                 firstArgument != null -> arguments.removeArgument(firstArgument)
             }
+
+            return element
         }
 
         private fun getReceiverExpression(receiver: ReceiverValue, psiFactory: KtPsiFactory): KtExpression? {

idea/src/org/jetbrains/kotlin/idea/refactoring/changeSignature/usages/KotlinUsageInfo.kt

@@ -28,5 +28,7 @@ abstract class KotlinUsageInfo<T : PsiElement> : UsageInfo {
     @Suppress("UNCHECKED_CAST")
     override fun getElement() = super.getElement() as T?
 
+    open fun preprocessUsage() {}
+
     abstract fun processUsage(changeInfo: KotlinChangeInfo, element: T, allUsages: Array<out UsageInfo>): Boolean
 }

idea/src/org/jetbrains/kotlin/idea/refactoring/kotlinRefactoringUtil.kt

@@ -70,6 +70,7 @@ import org.jetbrains.kotlin.idea.highlighter.markers.actualsForExpected
 import org.jetbrains.kotlin.idea.highlighter.markers.liftToExpected
 import org.jetbrains.kotlin.idea.intentions.RemoveCurlyBracesFromTemplateIntention
 import org.jetbrains.kotlin.idea.j2k.IdeaJavaToKotlinServices
+import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.idea.refactoring.changeSignature.KotlinValVar
 import org.jetbrains.kotlin.idea.refactoring.changeSignature.toValVar
 import org.jetbrains.kotlin.idea.refactoring.memberInfo.KtPsiClassWrapper
@@ -85,9 +86,7 @@ import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.codeFragmentUtil.suppressDiagnosticsInDebugMode
 import org.jetbrains.kotlin.psi.psiUtil.*
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
-import org.jetbrains.kotlin.resolve.AnalyzingUtils
-import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.DescriptorUtils
+import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.calls.callUtil.getCallWithAssert
 import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
@@ -797,6 +796,15 @@ fun dropOverrideKeywordIfNecessary(element: KtNamedDeclaration) {
     }
 }
 
+fun dropOperatorKeywordIfNecessary(element: KtNamedDeclaration) {
+    val callableDescriptor = element.resolveToDescriptorIfAny() as? CallableDescriptor ?: return
+    val diagnosticHolder = BindingTraceContext()
+    OperatorModifierChecker.check(element, callableDescriptor, diagnosticHolder, element.languageVersionSettings)
+    if (diagnosticHolder.bindingContext.diagnostics.any { it.factory == Errors.INAPPLICABLE_OPERATOR_MODIFIER }) {
+        element.removeModifier(KtTokens.OPERATOR_KEYWORD)
+    }
+}
+
 fun getQualifiedTypeArgumentList(
         initializer: KtExpression,
         context: BindingContext = initializer.analyze(BodyResolveMode.PARTIAL)

idea/testData/refactoring/changeSignature/GetConventionAddParameterAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun get(s: String, i: Int, b: Boolean) {}
+}
+
+fun usage(a: A) {
+    a["", 42, false]
+    A()["", 42, false]
+    a.get("", 42, false)
+}

idea/testData/refactoring/changeSignature/GetConventionAddParameterBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>get(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a["", 42]
+    A()["", 42]
+    a.get("", 42)
+}

idea/testData/refactoring/changeSignature/GetConventionParameterToReceiverBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>get(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a["", 42]
+    A()["", 42]
+    a.get("", 42)
+}

idea/testData/refactoring/changeSignature/GetConventionParameterToReceiverMessages.txt

@@ -0,0 +1,3 @@
+Explicit receiver is already present in call element: A()["", 42]
+Explicit receiver is already present in call element: a.get("", 42)
+Explicit receiver is already present in call element: a["", 42]

idea/testData/refactoring/changeSignature/GetConventionReceiverToParameterAfter.kt

@@ -0,0 +1,9 @@
+class A
+
+fun get(a: A, s: String, i: Int) {}
+
+fun usage(a: A) {
+    get(a, "", 42)
+    get(A(), "", 42)
+    get(a, "", 42)
+}

idea/testData/refactoring/changeSignature/GetConventionReceiverToParameterBefore.kt

@@ -0,0 +1,9 @@
+class A
+
+operator fun A.<caret>get(s: String, i: Int) {}
+
+fun usage(a: A) {
+    a["", 42]
+    A()["", 42]
+    a.get("", 42)
+}

idea/testData/refactoring/changeSignature/GetConventionRemoveParameterAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun get(i: Int) {}
+}
+
+fun usage(a: A) {
+    a[42]
+    A()[42]
+    a.get(42)
+}

idea/testData/refactoring/changeSignature/GetConventionRemoveParameterBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>get(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a["", 42]
+    A()["", 42]
+    a.get("", 42)
+}

idea/testData/refactoring/changeSignature/GetConventionRenameToFooAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    fun foo(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a.foo("", 42)
+    A().foo("", 42)
+    a.foo("", 42)
+}

idea/testData/refactoring/changeSignature/GetConventionRenameToFooBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>get(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a["", 42]
+    A()["", 42]
+    a.get("", 42)
+}

idea/testData/refactoring/changeSignature/GetConventionRenameToInvokeAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun invoke(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a("", 42)
+    A()("", 42)
+    a.invoke("", 42)
+}

idea/testData/refactoring/changeSignature/GetConventionRenameToInvokeBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>get(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a["", 42]
+    A()["", 42]
+    a.get("", 42)
+}

idea/testData/refactoring/changeSignature/GetConventionSwapParametersAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun get(i: Int, s: String) {}
+}
+
+fun usage(a: A) {
+    a[42, ""]
+    A()[42, ""]
+    a.get(42, "")
+}

idea/testData/refactoring/changeSignature/GetConventionSwapParametersBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>get(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a["", 42]
+    A()["", 42]
+    a.get("", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionAddParameterAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun invoke(s: String, i: Int, b: Boolean) {}
+}
+
+fun usage(a: A) {
+    a("", 42, false)
+    A()("", 42, false)
+    a.invoke("", 42, false)
+}

idea/testData/refactoring/changeSignature/InvokeConventionAddParameterBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>invoke(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a("", 42)
+    A()("", 42)
+    a.invoke("", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionParameterToReceiverBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>invoke(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a("", 42)
+    A()("", 42)
+    a.invoke("", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionParameterToReceiverMessages.txt

@@ -0,0 +1,3 @@
+Explicit receiver is already present in call element: A()("", 42)
+Explicit receiver is already present in call element: a("", 42)
+Explicit receiver is already present in call element: a.invoke("", 42)

idea/testData/refactoring/changeSignature/InvokeConventionReceiverToParameterAfter.kt

@@ -0,0 +1,9 @@
+class A
+
+fun invoke(a: A, s: String, i: Int) {}
+
+fun usage(a: A) {
+    invoke(a, "", 42)
+    invoke(A(), "", 42)
+    invoke(a, "", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionReceiverToParameterBefore.kt

@@ -0,0 +1,9 @@
+class A
+
+operator fun A.<caret>invoke(s: String, i: Int) {}
+
+fun usage(a: A) {
+    a("", 42)
+    A()("", 42)
+    a.invoke("", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionRemoveParameterAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun invoke(i: Int) {}
+}
+
+fun usage(a: A) {
+    a(42)
+    A()(42)
+    a.invoke(42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionRemoveParameterBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>invoke(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a("", 42)
+    A()("", 42)
+    a.invoke("", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionRenameToFooAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    fun foo(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a.foo("", 42)
+    A().foo("", 42)
+    a.foo("", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionRenameToFooBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>invoke(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a("", 42)
+    A()("", 42)
+    a.invoke("", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionRenameToGetAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun get(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a["", 42]
+    A()["", 42]
+    a.get("", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionRenameToGetBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>invoke(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a("", 42)
+    A()("", 42)
+    a.invoke("", 42)
+}

idea/testData/refactoring/changeSignature/InvokeConventionSwapParametersAfter.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun invoke(i: Int, s: String) {}
+}
+
+fun usage(a: A) {
+    a(42, "")
+    A()(42, "")
+    a.invoke(42, "")
+}

idea/testData/refactoring/changeSignature/InvokeConventionSwapParametersBefore.kt

@@ -0,0 +1,9 @@
+class A {
+    operator fun <caret>invoke(s: String, i: Int) {}
+}
+
+fun usage(a: A) {
+    a("", 42)
+    A()("", 42)
+    a.invoke("", 42)
+}

idea/tests/org/jetbrains/kotlin/idea/refactoring/changeSignature/KotlinChangeSignatureTest.kt

@@ -960,4 +960,52 @@ class KotlinChangeSignatureTest : KotlinLightCodeInsightFixtureTestCase() {
     fun testChangeReturnTypeToNonUnit() = doTest {
         newReturnTypeInfo = KotlinTypeInfo(true, BUILT_INS.intType)
     }
+
+    fun testInvokeConventionRemoveParameter() = doTest { removeParameter(0) }
+
+    fun testInvokeConventionAddParameter() = doTest {
+        addParameter(
+                KotlinParameterInfo(
+                        originalBaseFunctionDescriptor,
+                        -1,
+                        "b",
+                        KotlinTypeInfo(false, BUILT_INS.booleanType),
+                        defaultValueForCall = KtPsiFactory(project).createExpression("false")
+                )
+        )
+    }
+
+    fun testInvokeConventionSwapParameters() = doTest { swapParameters(0, 1) }
+
+    fun testInvokeConventionParameterToReceiver() = doTestConflict { receiverParameterInfo = newParameters[0] }
+
+    fun testInvokeConventionReceiverToParameter() = doTest { receiverParameterInfo = null }
+
+    fun testInvokeConventionRenameToFoo() = doTest { newName = "foo" }
+
+    fun testInvokeConventionRenameToGet() = doTest { newName = "get" }
+
+    fun testGetConventionRemoveParameter() = doTest { removeParameter(0) }
+
+    fun testGetConventionAddParameter() = doTest {
+        addParameter(
+                KotlinParameterInfo(
+                        originalBaseFunctionDescriptor,
+                        -1,
+                        "b",
+                        KotlinTypeInfo(false, BUILT_INS.booleanType),
+                        defaultValueForCall = KtPsiFactory(project).createExpression("false")
+                )
+        )
+    }
+
+    fun testGetConventionSwapParameters() = doTest { swapParameters(0, 1) }
+
+    fun testGetConventionParameterToReceiver() = doTestConflict { receiverParameterInfo = newParameters[0] }
+
+    fun testGetConventionReceiverToParameter() = doTest { receiverParameterInfo = null }
+
+    fun testGetConventionRenameToFoo() = doTest { newName = "foo" }
+
+    fun testGetConventionRenameToInvoke() = doTest { newName = "invoke" }
 }