Add inspections for implicit and explicit 'this' #KT-4580 Fixed

2017-10-20 20:54:01 +03:00
parent 817f79520a
commit 89c4196c06
41 changed files with 694 additions and 1 deletions
@@ -26,15 +26,28 @@ import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.scopes.LexicalScope
 import org.jetbrains.kotlin.resolve.scopes.utils.getImplicitReceiversHierarchy
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.typeUtil.isSubtypeOf
 import java.util.*
 fun LexicalScope.getImplicitReceiversWithInstance(): Collection<ReceiverParameterDescriptor>
        = getImplicitReceiversWithInstanceToExpression().keys
 interface ReceiverExpressionFactory {
    val isImmediate: Boolean
    val expressionText: String
    fun createExpression(psiFactory: KtPsiFactory, shortThis: Boolean = true): KtExpression
 }
 fun LexicalScope.getFactoryForImplicitReceiverWithSubtypeOf(receiverType: KotlinType): ReceiverExpressionFactory? {
    return getImplicitReceiversWithInstanceToExpression()
            .entries
            .firstOrNull { (receiverDescriptor, _) ->
                receiverDescriptor.type.isSubtypeOf(receiverType)
            }
            ?.value
 }
 fun LexicalScope.getImplicitReceiversWithInstanceToExpression(): Map<ReceiverParameterDescriptor, ReceiverExpressionFactory?> {
    // we use a set to workaround a bug with receiver for companion object present twice in the result of getImplicitReceiversHierarchy()
    val receivers = LinkedHashSet(getImplicitReceiversHierarchy())
@@ -43,7 +56,7 @@ fun LexicalScope.getImplicitReceiversWithInstanceToExpression(): Map<ReceiverPar
    var current: DeclarationDescriptor? = ownerDescriptor
    while (current != null) {
        if (current is PropertyAccessorDescriptor) {
-            current =  current.correspondingProperty
+            current = current.correspondingProperty
        }
        outerDeclarationsWithInstance.add(current)
@@ -75,6 +88,8 @@ fun LexicalScope.getImplicitReceiversWithInstanceToExpression(): Map<ReceiverPar
        }
        val factory = if (expressionText != null)
            object : ReceiverExpressionFactory {
                override val isImmediate = isImmediateThis
                override val expressionText get() = expressionText!!
                override fun createExpression(psiFactory: KtPsiFactory, shortThis: Boolean): KtExpression {
                    return psiFactory.createExpression(if (shortThis && isImmediateThis) "this" else expressionText)
                }
@@ -0,0 +1,5 @@
 <html>
 <body>
 This inspection reports usages of explicit 'this' when it can be omitted.
 </body>
 </html>
@@ -0,0 +1,5 @@
 <html>
 <body>
 This inspection reports usages of implicit 'this'.
 </body>
 </html>
@@ -2623,6 +2623,25 @@
                     level="WARNING"
                     language="kotlin"
    />
 	<localInspection implementationClass="org.jetbrains.kotlin.idea.inspections.ExplicitThisInspection"
                     displayName="Redundant explicit 'this'"
                     groupPath="Kotlin"
                     groupName="Redundant constructs"
                     enabledByDefault="true"
                     level="INFORMATION"
                     language="kotlin"
    />
    <localInspection implementationClass="org.jetbrains.kotlin.idea.inspections.ImplicitThisInspection"
                     displayName="Implicit 'this'"
                     groupPath="Kotlin"
                     groupName="Style issues"
                     enabledByDefault="true"
                     level="INFORMATION"
                     language="kotlin"
    />
    <localInspection implementationClass="org.jetbrains.kotlin.idea.inspections.RedundantUnitExpressionInspection"
                     displayName="Redundant 'Unit'"
@@ -0,0 +1,80 @@
 /*
 * Copyright 2010-2017 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 package org.jetbrains.kotlin.idea.inspections
 import com.intellij.codeInspection.LocalQuickFix
 import com.intellij.codeInspection.ProblemDescriptor
 import com.intellij.codeInspection.ProblemHighlightType.LIKE_UNUSED_SYMBOL
 import com.intellij.codeInspection.ProblemsHolder
 import com.intellij.openapi.project.Project
 import org.jetbrains.kotlin.idea.caches.resolve.analyzeFully
 import org.jetbrains.kotlin.idea.util.*
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getChildOfType
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.scopes.LexicalScope
 class ExplicitThisInspection : AbstractKotlinInspection() {
    override fun buildVisitor(holder: ProblemsHolder, isOnTheFly: Boolean) = object : KtVisitorVoid() {
        override fun visitDotQualifiedExpression(expression: KtDotQualifiedExpression) {
            val thisExpression = expression.receiverExpression as? KtThisExpression ?: return
            val context = expression.analyzeFully()
            val scope = expression.getResolutionScope(context) ?: return
            val selectorExpression = expression.selectorExpression as? KtReferenceExpression ?: return
            val referenceExpression = selectorExpression as? KtNameReferenceExpression
                                      ?: selectorExpression.getChildOfType()
                                      ?: return
            val scopeFunction = when (selectorExpression) {
                is KtNameReferenceExpression -> LexicalScope::getAllAccessibleVariables
                is KtCallExpression -> LexicalScope::getAllAccessibleFunctions
                else -> return
            }
            //we avoid overload-related problems by enforcing that there is only one candidate
            val candidates = scopeFunction(scope, referenceExpression.getReferencedNameAsName())
            if (candidates.size != 1) return
            val receiverType = context[BindingContext.EXPRESSION_TYPE_INFO, thisExpression]?.type ?: return
            val expressionFactory = scope.getFactoryForImplicitReceiverWithSubtypeOf(receiverType) ?: return
            val label = thisExpression.getLabelName() ?: ""
            if (!expressionFactory.matchesLabel(label)) return
            holder.registerProblem(thisExpression, "Redundant explicit this", LIKE_UNUSED_SYMBOL, Fix(thisExpression.text))
        }
        private fun ReceiverExpressionFactory.matchesLabel(label: String): Boolean {
            val implicitLabel = expressionText.substringAfter("@", "")
            return label == implicitLabel || (label == "" && isImmediate)
        }
    }
    private class Fix(private val text: String) : LocalQuickFix {
        override fun getFamilyName(): String = "Remove redundant '$text'"
        override fun applyFix(project: Project, descriptor: ProblemDescriptor) {
            val thisExpression = descriptor.psiElement as? KtThisExpression ?: return
            val parent = thisExpression.parent as? KtDotQualifiedExpression ?: return
            parent.replace(parent.selectorExpression ?: return)
        }
    }
 }
@@ -0,0 +1,74 @@
 /*
 * Copyright 2010-2017 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 package org.jetbrains.kotlin.idea.inspections
 import com.intellij.codeInspection.LocalQuickFix
 import com.intellij.codeInspection.ProblemDescriptor
 import com.intellij.codeInspection.ProblemHighlightType
 import com.intellij.codeInspection.ProblemsHolder
 import com.intellij.openapi.project.Project
 import org.jetbrains.kotlin.descriptors.CallableDescriptor
 import org.jetbrains.kotlin.idea.caches.resolve.analyzeFully
 import org.jetbrains.kotlin.idea.util.getFactoryForImplicitReceiverWithSubtypeOf
 import org.jetbrains.kotlin.idea.util.getResolutionScope
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getChildOfType
 import org.jetbrains.kotlin.resolve.BindingContext
 class ImplicitThisInspection : AbstractKotlinInspection() {
    override fun buildVisitor(holder: ProblemsHolder, isOnTheFly: Boolean) = object : KtVisitorVoid() {
        override fun visitExpression(expression: KtExpression) {
            if (expression !is KtNameReferenceExpression) return
            if (expression.isSelectorOfDotQualifiedExpression()) return
            val parent = expression.parent
            if (parent is KtCallExpression && parent.isSelectorOfDotQualifiedExpression()) return
            val referenceExpression = expression as? KtNameReferenceExpression
                                      ?: expression.getChildOfType()
                                      ?: return
            val context = expression.analyzeFully()
            val scope = expression.getResolutionScope(context) ?: return
            val descriptor = context[BindingContext.REFERENCE_TARGET, referenceExpression] as? CallableDescriptor ?: return
            val receiverDescriptor = descriptor.extensionReceiverParameter ?: descriptor.dispatchReceiverParameter ?: return
            val receiverType = receiverDescriptor.type
            val expressionFactory = scope.getFactoryForImplicitReceiverWithSubtypeOf(receiverType) ?: return
            val receiverText = if (expressionFactory.isImmediate) "this" else expressionFactory.expressionText
            holder.registerProblem(expression, "Add explicit '$receiverText'", ProblemHighlightType.GENERIC_ERROR_OR_WARNING, Fix(receiverText))
        }
        private fun KtExpression.isSelectorOfDotQualifiedExpression(): Boolean {
            val parent = parent
            return parent is KtDotQualifiedExpression && parent.selectorExpression == this
        }
    }
    private class Fix(private val receiverText: String) : LocalQuickFix {
        override fun getFamilyName() = "Add explicit '$receiverText'"
        override fun applyFix(project: Project, descriptor: ProblemDescriptor) {
            val expression = descriptor.psiElement as? KtExpression ?: return
            val factory = KtPsiFactory(project)
            val call = expression.parent as? KtCallExpression ?: expression
            call.replace(factory.createExpressionByPattern("$0.$1", receiverText, call.text))
        }
    }
 }
@@ -0,0 +1 @@
 org.jetbrains.kotlin.idea.inspections.ExplicitThisInspection
@@ -0,0 +1,12 @@
 // WITH_RUNTIME
 // PROBLEM: none
 class Foo {
    val s = ""
    fun test() {
        Foo().apply {
            <caret>this@Foo.s
        }
    }
 }
@@ -0,0 +1,12 @@
 // WITH_RUNTIME
 // PROBLEM: none
 class Foo {
    fun test() {
        Foo().apply {
            <caret>this@Foo.s()
        }
    }
 }
 fun Foo.s() {}
@@ -0,0 +1,16 @@
 // WITH_RUNTIME
 // PROBLEM: none
 class Foo {
    val s = ""
    fun test() {
        Bar().apply {
            <caret>this@Foo.s
        }
    }
 }
 class Bar {
    val s = ""
 }
@@ -0,0 +1,16 @@
 // WITH_RUNTIME
 // PROBLEM: none
 class Foo {
    fun test() {
        Bar().apply {
            <caret>this@Foo.s()
        }
    }
 }
 class Bar
 fun Foo.s() {}
 fun Bar.s() {}
@@ -0,0 +1,7 @@
 class Foo {
    fun test() {
        <caret>this.s()
    }
 }
 fun Foo.s() = ""
@@ -0,0 +1,7 @@
 class Foo {
    fun test() {
        <caret>s()
    }
 }
 fun Foo.s() = ""
@@ -0,0 +1,7 @@
 class Foo {
    fun s() = ""
    fun test() {
        <caret>this.s()
    }
 }
@@ -0,0 +1,7 @@
 class Foo {
    fun s() = ""
    fun test() {
        <caret>s()
    }
 }
@@ -0,0 +1,11 @@
 // WITH_RUNTIME
 class Foo {
    val s = ""
    fun test() {
        "".apply {
            <caret>this@Foo.s
        }
    }
 }
@@ -0,0 +1,11 @@
 // WITH_RUNTIME
 class Foo {
    val s = ""
    fun test() {
        "".apply {
            <caret>s
        }
    }
 }
@@ -0,0 +1,11 @@
 // WITH_RUNTIME
 class Foo {
    fun test() {
        "".apply {
            <caret>this@Foo.s()
        }
    }
 }
 fun Foo.s() = ""
@@ -0,0 +1,11 @@
 // WITH_RUNTIME
 class Foo {
    fun test() {
        "".apply {
            <caret>s()
        }
    }
 }
 fun Foo.s() = ""
@@ -0,0 +1,18 @@
 // WITH_RUNTIME
 // PROBLEM: none
 class Foo {
    val s = ""
    fun test() {
        Bar().apply {
            "".run {
                <caret>this@apply.s
            }
        }
    }
 }
 class Bar {
    val s = ""
 }
@@ -0,0 +1,17 @@
 // WITH_RUNTIME
 // PROBLEM: none
 class Foo {
    fun s(a: String) {}
    fun test() {
        Bar().apply {
            <caret>this@Foo.s("")
        }
    }
 }
 class Bar {
    fun s() {}
 }
@@ -0,0 +1,17 @@
 // WITH_RUNTIME
 // PROBLEM: none
 class Foo {
    fun test() {
        Bar().apply {
            "".run {
                <caret>this@apply.s()
            }
        }
    }
 }
 class Bar
 fun Foo.s() {}
 fun Bar.s() {}
@@ -0,0 +1,15 @@
 // WITH_RUNTIME
 // PROBLEM: none
 class Foo {
    fun test() {
        Bar().apply {
            <caret>this@Foo.s("")
        }
    }
 }
 class Bar
 fun Foo.s(a: String) {}
 fun Bar.s() {}
@@ -0,0 +1,7 @@
 class Foo {
    val s = ""
    fun test() {
        <caret>this.s
    }
 }
@@ -0,0 +1,7 @@
 class Foo {
    val s = ""
    fun test() {
        <caret>s
    }
 }
@@ -0,0 +1,11 @@
 // WITH_RUNTIME
 // PROBLEM: none
 class Foo {
    var s = ""
    fun test() {
        val s = ""
        <caret>this.s = s
    }
 }
@@ -0,0 +1 @@
 org.jetbrains.kotlin.idea.inspections.ImplicitThisInspection
@@ -0,0 +1,7 @@
 class Foo {
    fun s() = ""
    fun test() {
        <caret>s()
    }
 }
@@ -0,0 +1,7 @@
 class Foo {
    fun s() = ""
    fun test() {
        <caret>this.s()
    }
 }
@@ -0,0 +1,9 @@
 // PROBLEM: none
 class Foo {
    fun s() = ""
    fun test() {
        <caret>this.s()
    }
 }
@@ -0,0 +1,15 @@
 // WITH_RUNTIME
 class Foo {
    fun Bar.s() = ""
 }
 class Bar
 fun test() {
    Bar().apply {
        Foo().apply apply2@ {
            <caret>s()
        }
    }
 }
@@ -0,0 +1,15 @@
 // WITH_RUNTIME
 class Foo {
    fun Bar.s() = ""
 }
 class Bar
 fun test() {
    Bar().apply {
        Foo().apply apply2@ {
            <caret>this@apply.s()
        }
    }
 }
@@ -0,0 +1,11 @@
 // WITH_RUNTIME
 class Foo {
    fun s() = ""
    fun test() {
        "".apply {
            <caret>s()
        }
    }
 }
@@ -0,0 +1,11 @@
 // WITH_RUNTIME
 class Foo {
    fun s() = ""
    fun test() {
        "".apply {
            <caret>this@Foo.s()
        }
    }
 }
@@ -0,0 +1,8 @@
 class Foo {
    val f = Foo()
    val s = ""
    fun test() {
        <caret>f.s
    }
 }
@@ -0,0 +1,8 @@
 class Foo {
    val f = Foo()
    val s = ""
    fun test() {
        <caret>this.f.s
    }
 }
@@ -0,0 +1,7 @@
 class Foo {
    val s = ""
    fun test() {
        <caret>s
    }
 }
@@ -0,0 +1,7 @@
 class Foo {
    val s = ""
    fun test() {
        <caret>this.s
    }
 }
@@ -0,0 +1,9 @@
 // PROBLEM: none
 class Foo {
    val s = ""
    fun test() {
        <caret>this.s
    }
 }
@@ -0,0 +1,9 @@
 // PROBLEM: none
 class Foo {
    fun test() {
        <caret>s()
    }
 }
 fun s() = ""
@@ -621,6 +621,156 @@ public class LocalInspectionTestGenerated extends AbstractLocalInspectionTest {
        }
    }
    @TestMetadata("idea/testData/inspectionsLocal/explicitThis")
    @TestDataPath("$PROJECT_ROOT")
    @RunWith(JUnit3RunnerWithInners.class)
    public static class ExplicitThis extends AbstractLocalInspectionTest {
        public void testAllFilesPresentInExplicitThis() throws Exception {
            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/inspectionsLocal/explicitThis"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), TargetBackend.ANY, true);
        }
        @TestMetadata("differentReceiverInstance.kt")
        public void testDifferentReceiverInstance() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/differentReceiverInstance.kt");
            doTest(fileName);
        }
        @TestMetadata("differentReceiverInstanceExtension.kt")
        public void testDifferentReceiverInstanceExtension() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/differentReceiverInstanceExtension.kt");
            doTest(fileName);
        }
        @TestMetadata("differentReceiverType.kt")
        public void testDifferentReceiverType() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/differentReceiverType.kt");
            doTest(fileName);
        }
        @TestMetadata("differentReceiverTypeExtension.kt")
        public void testDifferentReceiverTypeExtension() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/differentReceiverTypeExtension.kt");
            doTest(fileName);
        }
        @TestMetadata("extension.kt")
        public void testExtension() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/extension.kt");
            doTest(fileName);
        }
        @TestMetadata("function.kt")
        public void testFunction() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/function.kt");
            doTest(fileName);
        }
        @TestMetadata("multipleReceivers.kt")
        public void testMultipleReceivers() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/multipleReceivers.kt");
            doTest(fileName);
        }
        @TestMetadata("multipleReceiversExtension.kt")
        public void testMultipleReceiversExtension() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/multipleReceiversExtension.kt");
            doTest(fileName);
        }
        @TestMetadata("nestedReceivers.kt")
        public void testNestedReceivers() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/nestedReceivers.kt");
            doTest(fileName);
        }
        @TestMetadata("nestedReceiversDifferentParameters.kt")
        public void testNestedReceiversDifferentParameters() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/nestedReceiversDifferentParameters.kt");
            doTest(fileName);
        }
        @TestMetadata("nestedReceiversExtension.kt")
        public void testNestedReceiversExtension() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/nestedReceiversExtension.kt");
            doTest(fileName);
        }
        @TestMetadata("nestedReceiversExtensionDifferentParameters.kt")
        public void testNestedReceiversExtensionDifferentParameters() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/nestedReceiversExtensionDifferentParameters.kt");
            doTest(fileName);
        }
        @TestMetadata("property.kt")
        public void testProperty() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/property.kt");
            doTest(fileName);
        }
        @TestMetadata("variableWithSameName.kt")
        public void testVariableWithSameName() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/explicitThis/variableWithSameName.kt");
            doTest(fileName);
        }
    }
    @TestMetadata("idea/testData/inspectionsLocal/implicitThis")
    @TestDataPath("$PROJECT_ROOT")
    @RunWith(JUnit3RunnerWithInners.class)
    public static class ImplicitThis extends AbstractLocalInspectionTest {
        public void testAllFilesPresentInImplicitThis() throws Exception {
            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/inspectionsLocal/implicitThis"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), TargetBackend.ANY, true);
        }
        @TestMetadata("function.kt")
        public void testFunction() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/function.kt");
            doTest(fileName);
        }
        @TestMetadata("functionPartOfCall.kt")
        public void testFunctionPartOfCall() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/functionPartOfCall.kt");
            doTest(fileName);
        }
        @TestMetadata("multipleReceivers.kt")
        public void testMultipleReceivers() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/multipleReceivers.kt");
            doTest(fileName);
        }
        @TestMetadata("nested.kt")
        public void testNested() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/nested.kt");
            doTest(fileName);
        }
        @TestMetadata("nestedCall.kt")
        public void testNestedCall() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/nestedCall.kt");
            doTest(fileName);
        }
        @TestMetadata("property.kt")
        public void testProperty() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/property.kt");
            doTest(fileName);
        }
        @TestMetadata("propertyPartOfCall.kt")
        public void testPropertyPartOfCall() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/propertyPartOfCall.kt");
            doTest(fileName);
        }
        @TestMetadata("topLevel.kt")
        public void testTopLevel() throws Exception {
            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/topLevel.kt");
            doTest(fileName);
        }
    }
    @TestMetadata("idea/testData/inspectionsLocal/kdocMissingDocumentation")
    @TestDataPath("$PROJECT_ROOT")
    @RunWith(JUnit3RunnerWithInners.class)
		`@@ -0,0 +1 @@`
							`org.jetbrains.kotlin.idea.inspections.ExplicitThisInspection`
		`@@ -0,0 +1 @@`
							`org.jetbrains.kotlin.idea.inspections.ImplicitThisInspection`