From e84aa78ac64bcf25ebf255ae961a0545a6576262 Mon Sep 17 00:00:00 2001
From: Sergey Mashkov <sergey.mashkov@jetbrains.com>
Date: Thu, 30 Apr 2015 15:34:27 +0300
Subject: [PATCH] JS introduce marker annotation

---
 js/js.libraries/src/core/annotations.kt       | 3 +++
 js/js.libraries/src/core/dom3.kt              | 4 ++--
 libraries/tools/idl2k/src/main/kotlin/gen2.kt | 7 +++++--
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/js/js.libraries/src/core/annotations.kt b/js/js.libraries/src/core/annotations.kt
index f2d93397d0d..db66184b765 100644
--- a/js/js.libraries/src/core/annotations.kt
+++ b/js/js.libraries/src/core/annotations.kt
@@ -29,3 +29,6 @@ native
 public annotation class library(public val name: String = "")
 native
 public annotation class enumerable()
+
+native
+public annotation class marker
\ No newline at end of file
diff --git a/js/js.libraries/src/core/dom3.kt b/js/js.libraries/src/core/dom3.kt
index f36fe2b2332..f0f24f4e343 100644
--- a/js/js.libraries/src/core/dom3.kt
+++ b/js/js.libraries/src/core/dom3.kt
@@ -5505,7 +5505,7 @@ native trait PseudoElement {
 }
 native trait CSS {
 }
-native trait UnionHTMLOptGroupElementOrHTMLOptionElement {
+native marker trait UnionHTMLOptGroupElementOrHTMLOptionElement {
 }
-native trait UnionElementOrMouseEvent {
+native marker trait UnionElementOrMouseEvent {
 }
diff --git a/libraries/tools/idl2k/src/main/kotlin/gen2.kt b/libraries/tools/idl2k/src/main/kotlin/gen2.kt
index b39cf2bdabe..c733c336247 100644
--- a/libraries/tools/idl2k/src/main/kotlin/gen2.kt
+++ b/libraries/tools/idl2k/src/main/kotlin/gen2.kt
@@ -205,11 +205,14 @@ private fun <O : Appendable> O.renderFunction(allTypes: Set<String>, f: Generate
     appendln(") : ${f.returnType.mapUnknownType(allTypes)} = noImpl")
 }
 
-fun <O : Appendable> O.render(allTypes: Map<String, GenerateTraitOrClass>, classesToUnions : Map<String, List<UnionType>>, iface: GenerateTraitOrClass) {
+fun <O : Appendable> O.render(allTypes: Map<String, GenerateTraitOrClass>, classesToUnions : Map<String, List<UnionType>>, iface: GenerateTraitOrClass, markerAnnotation : Boolean = false) {
     val superTypes = iface.allSuperTypes(allTypes).filter { it.name != "" }
     val superTypesNames = superTypes.map { it.name }.toSet()
 
     append("native ")
+    if (markerAnnotation) {
+        append("marker ")
+    }
     when (iface.type) {
         GenerateDefinitionType.CLASS -> append("open class ")
         GenerateDefinitionType.TRAIT -> append("trait ")
@@ -267,6 +270,6 @@ fun <O : Appendable> O.render(ifaces: List<GenerateTraitOrClass>) {
     }
 
     unionTypeTraits.forEach {
-        render(all, emptyMap(), it)
+        render(all, emptyMap(), it, markerAnnotation = true)
     }
 }
\ No newline at end of file