Keyword completion: complete data class with parentheses

#KT-30511 Fixed

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/KeywordCompletion.kt

@@ -129,12 +129,15 @@ object KeywordCompletion {
             if (constructText != null && !applicableAsCompound) {
                 val element = createKeywordConstructLookupElement(position.project, keyword, constructText)
                 consumer(element)
-            }
-            else {
+            } else {
                 if (listOf(CLASS_KEYWORD, OBJECT_KEYWORD, INTERFACE_KEYWORD).any { keyword.endsWith(it.value) }) {
                     val topLevelClassName = getTopLevelClassName(position)
                     if (topLevelClassName != null) {
-                        consumer(createLookupElementBuilder("$keyword $topLevelClassName", position))
+                        if (keyword.startsWith(DATA_KEYWORD.value)) {
+                            consumer(createKeywordConstructLookupElement(position.project, keyword, "$keyword $topLevelClassName(caret)"))
+                        } else {
+                            consumer(createLookupElementBuilder("$keyword $topLevelClassName", position))
+                        }
                     }
                 }
                 consumer(createLookupElementBuilder(keyword, position))

idea/idea-completion/testData/keywords/AfterClasses_LangLevel10.kt

@@ -34,7 +34,7 @@ class B {
 // EXIST:  sealed class
 // EXIST:  sealed class AfterClasses_LangLevel10
 // EXIST:  data class
-// EXIST:  data class AfterClasses_LangLevel10
+// EXIST:  { "lookupString":"data class", "itemText":"data class", "tailText":" AfterClasses_LangLevel10(...)", "attributes":"bold" }
 // EXIST:  inline
 // EXIST:  tailrec
 // EXIST:  external

idea/idea-completion/testData/keywords/AfterClasses_LangLevel11.kt

@@ -34,7 +34,7 @@ class B {
 // EXIST:  sealed class
 // EXIST:  sealed class AfterClasses_LangLevel11
 // EXIST:  data class
-// EXIST:  data class AfterClasses_LangLevel11
+// EXIST:  { "lookupString":"data class", "itemText":"data class", "tailText":" AfterClasses_LangLevel11(...)", "attributes":"bold" }
 // EXIST:  inline
 // EXIST:  tailrec
 // EXIST:  external

idea/idea-completion/testData/keywords/GlobalPropertyAccessors.kt

@@ -38,7 +38,7 @@ var a : Int
 // EXIST:  sealed class
 // EXIST:  sealed class GlobalPropertyAccessors
 // EXIST:  data class
-// EXIST:  data class GlobalPropertyAccessors
+// EXIST:  { "lookupString":"data class", "itemText":"data class", "tailText":" GlobalPropertyAccessors(...)", "attributes":"bold" }
 // EXIST:  inline
 // EXIST:  tailrec
 // EXIST:  external

idea/idea-completion/testData/keywords/InTopScopeAfterPackage.kt

@@ -25,7 +25,7 @@ package Test
 // EXIST:  sealed class
 // EXIST:  sealed class InTopScopeAfterPackage
 // EXIST:  data class
-// EXIST:  data class InTopScopeAfterPackage
+// EXIST:  { "lookupString":"data class", "itemText":"data class", "tailText":" InTopScopeAfterPackage(...)", "attributes":"bold" }
 // EXIST:  inline
 // EXIST:  tailrec
 // EXIST:  external

idea/idea-completion/testData/keywords/TopScope.kt

@@ -24,7 +24,7 @@
 // EXIST:  sealed class
 // EXIST:  sealed class TopScope
 // EXIST:  data class
-// EXIST:  data class TopScope
+// EXIST:  { "lookupString":"data class", "itemText":"data class", "tailText":" TopScope(...)", "attributes":"bold" }
 // EXIST:  inline
 // EXIST:  tailrec
 // EXIST:  external