J2K adds "operator" modifier to methods that look like operator on conversion

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

@@ -40,6 +40,10 @@ class AddOperatorModifierIntention : JetSelfTargetingRangeIntention<JetNamedFunc
     }
 
     override fun applyTo(element: JetNamedFunction, editor: Editor) {
+        applyTo(element)
+    }
+
+    fun applyTo(element: JetNamedFunction) {
         element.addModifier(JetTokens.OPERATOR_KEYWORD)
     }
 }

idea/src/org/jetbrains/kotlin/idea/j2k/J2kPostProcessings.kt

@@ -60,6 +60,7 @@ object J2KPostProcessingRegistrar {
         registerIntentionBasedProcessing(IfNullToElvisIntention()) { applyTo(it) }
         registerIntentionBasedProcessing(SimplifyNegatedBinaryExpressionIntention()) { applyTo(it) }
         registerIntentionBasedProcessing(ReplaceGetIntention()) { applyTo(it) }
+        registerIntentionBasedProcessing(AddOperatorModifierIntention()) { applyTo(it) }
 
         registerDiagnosticBasedProcessing<JetBinaryExpressionWithTypeRHS>(Errors.USELESS_CAST) { element, diagnostic ->
             val expression = RemoveRightPartOfBinaryExpressionFix(element, "").invoke()

idea/src/org/jetbrains/kotlin/idea/j2k/J2kPostProcessor.kt

@@ -22,6 +22,7 @@ import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiRecursiveElementVisitor
 import com.intellij.psi.codeStyle.CodeStyleManager
 import com.intellij.util.SmartList
+import org.jetbrains.kotlin.idea.caches.resolve.KotlinOutOfBlockCompletionModificationTracker
 import org.jetbrains.kotlin.idea.caches.resolve.getResolutionFacade
 import org.jetbrains.kotlin.idea.caches.resolve.resolveImportReference
 import org.jetbrains.kotlin.idea.conversion.copy.range
@@ -32,7 +33,7 @@ import org.jetbrains.kotlin.psi.JetElement
 import org.jetbrains.kotlin.psi.JetFile
 import org.jetbrains.kotlin.psi.psiUtil.elementsInRange
 import org.jetbrains.kotlin.resolve.diagnostics.Diagnostics
-import java.util.LinkedHashMap
+import java.util.*
 
 public class J2kPostProcessor(private val formatCode: Boolean) : PostProcessor {
     override fun insertImport(file: JetFile, fqName: FqName) {
@@ -65,6 +66,9 @@ public class J2kPostProcessor(private val formatCode: Boolean) : PostProcessor {
 
             if (modificationStamp == file.modificationStamp) break
 
+            //TODO: it's a hack!
+            KotlinOutOfBlockCompletionModificationTracker.getInstance(file.project).incModificationCount()
+
             elementToActions = collectAvailableActions(file, rangeMarker)
         }
 

j2k/testData/fileOrElement/postProcessing/GetOperator.kt

@@ -3,7 +3,7 @@ import java.util.HashMap
 import kotlinApi.KotlinClass
 
 internal class X {
-    fun get(index: Int): Int {
+    operator fun get(index: Int): Int {
         return 0
     }
 }
@@ -14,7 +14,7 @@ internal class C {
     }
 
     fun foo(x: X): Int {
-        return x.get(0)
+        return x[0]
     }
 
     fun foo(kotlinClass: KotlinClass): Int {