IDE: Don't do any resolution in ReplaceInfixOrOperatorCallFix.invoke().

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

@@ -13,8 +13,8 @@ import org.jetbrains.kotlin.diagnostics.Diagnostic
 import org.jetbrains.kotlin.diagnostics.Errors
 import org.jetbrains.kotlin.idea.KotlinBundle
 import org.jetbrains.kotlin.idea.caches.resolve.resolveToCall
-import org.jetbrains.kotlin.idea.intentions.OperatorToFunctionIntention
 import org.jetbrains.kotlin.lexer.KtTokens
+import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getAssignmentByLHS
 import org.jetbrains.kotlin.resolve.calls.resolvedCallUtil.getImplicitReceiverValue
@@ -23,7 +23,8 @@ import org.jetbrains.kotlin.types.expressions.OperatorConventions
 
 class ReplaceInfixOrOperatorCallFix(
     element: KtExpression,
-    private val notNullNeeded: Boolean
+    private val notNullNeeded: Boolean,
+    private val binaryOperatorName: String = ""
 ) : KotlinQuickFixAction<KtExpression>(element) {
 
     override fun getText() = KotlinBundle.message("replace.with.safe.call")
@@ -58,20 +59,18 @@ class ReplaceInfixOrOperatorCallFix(
                 replacement = element.replace(newExpression)
             }
             is KtBinaryExpression -> {
-                replacement = if (element.operationToken == KtTokens.IDENTIFIER) {
-                    val newExpression = psiFactory.createExpressionByPattern(
-                        "$0?.$1($2)$elvis", element.left ?: return, element.operationReference.text, element.right ?: return
-                    )
-                    element.replace(newExpression)
+                val left = element.left ?: return
+                val right = element.right ?: return
+
+                // `a += b` is replaced with `a = a?.plus(b)` when the += operator is not available
+                val isNormalAssignment = element.operationToken in KtTokens.AUGMENTED_ASSIGNMENTS &&
+                        Name.identifier(binaryOperatorName) !in OperatorConventions.ASSIGNMENT_OPERATIONS.values
+                val newExpression = if (isNormalAssignment) {
+                    psiFactory.createExpressionByPattern("$0 = $0?.$1($2)", left, binaryOperatorName, right)
                 } else {
-                    val nameExpression = OperatorToFunctionIntention.convert(element).second
-                    val callExpression = nameExpression.parent as KtCallExpression
-                    val qualifiedExpression = callExpression.parent as KtDotQualifiedExpression
-                    val safeExpression = psiFactory.createExpressionByPattern(
-                        "$0?.$1$elvis", qualifiedExpression.receiverExpression, callExpression
-                    )
-                    qualifiedExpression.replace(safeExpression)
+                    psiFactory.createExpressionByPattern("$0?.$1($2)$elvis", left, binaryOperatorName, right)
                 }
+                replacement = element.replace(newExpression)
             }
         }
         if (elvis.isNotEmpty()) {
@@ -95,7 +94,17 @@ class ReplaceInfixOrOperatorCallFix(
                         parent.left == null || parent.right == null -> null
                         parent.operationToken == KtTokens.EQ -> null
                         parent.operationToken in OperatorConventions.COMPARISON_OPERATIONS -> null
-                        else -> ReplaceInfixOrOperatorCallFix(parent, parent.shouldHaveNotNullType())
+                        else -> {
+                            val binaryOperatorName = if (parent.operationToken == KtTokens.IDENTIFIER) {
+                                // Get name of infix function call
+                                parent.operationReference.text
+                            } else {
+                                parent.resolveToCall(BodyResolveMode.FULL)?.candidateDescriptor?.name?.asString()
+                            }
+                            binaryOperatorName?.let {
+                                ReplaceInfixOrOperatorCallFix(parent, parent.shouldHaveNotNullType(), binaryOperatorName)
+                            }
+                        }
                     }
                 }
                 is KtCallExpression -> {

idea/testData/quickfix/replaceInfixOrOperatorCall/augmentedAssignmentAvailable.kt

@@ -0,0 +1,9 @@
+// "Replace with safe (?.) call" "true"
+class A {
+    operator fun plusAssign(other: A) {}
+}
+
+fun foo(b: A) {
+    var a: A? = A()
+    a <caret>+= b
+}

idea/testData/quickfix/replaceInfixOrOperatorCall/augmentedAssignmentAvailable.kt.after

@@ -0,0 +1,9 @@
+// "Replace with safe (?.) call" "true"
+class A {
+    operator fun plusAssign(other: A) {}
+}
+
+fun foo(b: A) {
+    var a: A? = A()
+    a?.plusAssign(b)
+}

idea/testData/quickfix/replaceInfixOrOperatorCall/augmentedAssignmentNotAvailable.kt

@@ -0,0 +1,9 @@
+// "Replace with safe (?.) call" "true"
+class A {
+    operator fun plus(other: A) = this
+}
+
+fun foo(b: A) {
+    var a: A? = A()
+    a <caret>+= b
+}

idea/testData/quickfix/replaceInfixOrOperatorCall/augmentedAssignmentNotAvailable.kt.after

@@ -0,0 +1,9 @@
+// "Replace with safe (?.) call" "true"
+class A {
+    operator fun plus(other: A) = this
+}
+
+fun foo(b: A) {
+    var a: A? = A()
+    a = a?.plus(b)
+}

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -11673,6 +11673,16 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
             runTest("idea/testData/quickfix/replaceInfixOrOperatorCall/assignmentList.kt");
         }
 
+        @TestMetadata("augmentedAssignmentAvailable.kt")
+        public void testAugmentedAssignmentAvailable() throws Exception {
+            runTest("idea/testData/quickfix/replaceInfixOrOperatorCall/augmentedAssignmentAvailable.kt");
+        }
+
+        @TestMetadata("augmentedAssignmentNotAvailable.kt")
+        public void testAugmentedAssignmentNotAvailable() throws Exception {
+            runTest("idea/testData/quickfix/replaceInfixOrOperatorCall/augmentedAssignmentNotAvailable.kt");
+        }
+
         @TestMetadata("binaryOperator.kt")
         public void testBinaryOperator() throws Exception {
             runTest("idea/testData/quickfix/replaceInfixOrOperatorCall/binaryOperator.kt");