KTIJ-650 [Code completion]: "sealed interface" is for 1.5+ only

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

@@ -122,11 +122,13 @@ object KeywordCompletion {
 
     fun complete(position: PsiElement, prefixMatcher: PrefixMatcher, isJvmModule: Boolean, consumer: (LookupElement) -> Unit) {
         if (!GENERAL_FILTER.isAcceptable(position, position)) return
+        val sealedInterfacesEnabled = position.languageVersionSettings.supportsFeature(LanguageFeature.SealedInterfaces)
 
         val parserFilter = buildFilter(position)
         for (keywordToken in ALL_KEYWORDS) {
             val nextKeywords = keywordToken.getNextPossibleKeywords(position) ?: setOf(null)
             nextKeywords.forEach {
+                if (keywordToken == SEALED_KEYWORD && it == INTERFACE_KEYWORD && !sealedInterfacesEnabled) return@forEach
                 handleCompoundKeyword(position, keywordToken, it, isJvmModule, prefixMatcher, parserFilter, consumer)
             }
         }

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 class MouseMovedEventArgs
 {
   public val X : Int = 0

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 class A {
     fun foo() {
         bar()

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

@@ -33,8 +33,6 @@ class B {
 // EXIST:  infix
 // EXIST:  sealed class
 // EXIST:  sealed class AfterClasses_LangLevel10
-// EXIST:  sealed interface AfterClasses_LangLevel10
-// EXIST:  sealed interface
 // EXIST:  data class
 // EXIST:  { "lookupString":"data class", "itemText":"data class", "tailText":" AfterClasses_LangLevel10(...)", "attributes":"bold" }
 // EXIST:  inline

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

@@ -33,8 +33,6 @@ class B {
 // EXIST:  infix
 // EXIST:  sealed class
 // EXIST:  sealed class AfterClasses_LangLevel11
-// EXIST:  sealed interface AfterClasses_LangLevel11
-// EXIST:  sealed interface
 // EXIST:  data class
 // EXIST:  { "lookupString":"data class", "itemText":"data class", "tailText":" AfterClasses_LangLevel11(...)", "attributes":"bold" }
 // EXIST:  inline

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 class A {
     fun foo() {
         bar()

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 fun foo() {
     bar()
 }

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 annotation class Test {
     <caret>
 }

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 public class Test {
 
     <caret>

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 class TestClass {
     <caret>
 }

idea/idea-completion/testData/keywords/InEnumScope2.kt

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 enum class Test {
     ;
 

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 interface Test {
     <caret>
 }

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 object Test {
     <caret>
 }

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 package Test
 
 <caret>

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 class Some {
     var a : Int
         <caret>

idea/idea-completion/testData/keywords/PropertyAccessors2.kt

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 class Some {
     var a : Int = 1
         <caret>

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 class Some {
     var a : Int
         get() = 0

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 seal<caret>
 // EXIST: "sealed class SealedWithName"
 // EXIST: "sealed interface SealedWithName"

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 class OuterClass {
     seal<caret>
 }

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

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 <caret>
 
 // EXIST:  abstract

idea/idea-completion/testData/keywords/TopScope3-.kt

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 <caret>
 
 // EXIST:  abstract

idea/idea-completion/testData/keywords/topScope2.kt

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:+SealedInterfaces -XXLanguage:+MultiPlatformProjects
+
 <caret>
 
 // EXIST:  abstract