include extension function in the list of extensions for a class if the class is an upper bound of the receiver type parameter

2 files changed, 10 insertions, 0 deletions

diff --git a/core/src/main/kotlin/Kotlin/DocumentationBuilder.kt b/core/src/main/kotlin/Kotlin/DocumentationBuilder.kt
index 2a69bb13..aaaffd6f 100644
--- a/core/src/main/kotlin/Kotlin/DocumentationBuilder.kt
+++ b/core/src/main/kotlin/Kotlin/DocumentationBuilder.kt
@@ -546,6 +546,12 @@ class DocumentationBuilder
         if ((receiverClass as? ClassDescriptor)?.isCompanionObject ?: false) {
             receiverClass = receiverClass.containingDeclaration!!
         }
+        else if (receiverClass is TypeParameterDescriptor) {
+            val upperBoundClass = receiverClass.upperBounds.singleOrNull()?.constructor?.declarationDescriptor
+            if (upperBoundClass != null) {
+                receiverClass = upperBoundClass
+            }
+        }
         link(receiverClass,
                 containingDeclaration,
                 RefKind.Extension)
diff --git a/core/src/test/kotlin/format/MarkdownFormatTest.kt b/core/src/test/kotlin/format/MarkdownFormatTest.kt
index 509b5f39..427889c5 100644
--- a/core/src/test/kotlin/format/MarkdownFormatTest.kt
+++ b/core/src/test/kotlin/format/MarkdownFormatTest.kt
@@ -238,6 +238,10 @@ public class MarkdownFormatTest {
         verifyMarkdownNodeByName("inapplicableExtensionFunctions", "Bar")
     }
 
+    @Test fun receiverParameterTypeBound() {
+        verifyMarkdownNodeByName("receiverParameterTypeBound", "Foo")
+    }
+
     private fun verifyMarkdownPackage(fileName: String, withKotlinRuntime: Boolean = false) {
         verifyOutput("testdata/format/$fileName.kt", ".package.md", withKotlinRuntime = withKotlinRuntime) { model, output ->
             markdownService.appendNodes(tempLocation, output, model.members)