Render functional type in parenthesis when it in receiver position

4 files changed, 22 insertions, 1 deletions

diff --git a/core/src/main/kotlin/Kotlin/KotlinLanguageService.kt b/core/src/main/kotlin/Kotlin/KotlinLanguageService.kt
index e54772b3..f33c8c96 100644
--- a/core/src/main/kotlin/Kotlin/KotlinLanguageService.kt
+++ b/core/src/main/kotlin/Kotlin/KotlinLanguageService.kt
@@ -414,7 +414,15 @@ class KotlinLanguageService : LanguageService {
             if (signatureMapper != null) {
                 signatureMapper.renderReceiver(receiver, this)
             } else {
-                renderType(receiver.detail(NodeKind.Type), renderMode)
+                val type = receiver.detail(NodeKind.Type)
+
+                if (type.isFunctionalType()) {
+                    symbol("(")
+                    renderFunctionalType(type, renderMode)
+                    symbol(")")
+                } else {
+                    renderType(type, renderMode)
+                }
             }
             symbol(".")
         }
diff --git a/core/src/test/kotlin/format/MarkdownFormatTest.kt b/core/src/test/kotlin/format/MarkdownFormatTest.kt
index 4830d760..121e9afb 100644
--- a/core/src/test/kotlin/format/MarkdownFormatTest.kt
+++ b/core/src/test/kotlin/format/MarkdownFormatTest.kt
@@ -254,6 +254,10 @@ class MarkdownFormatTest {
         verifyMarkdownNodes("memberExtension") { model -> model.members.single().members.filter { it.name == "Foo" } }
     }
 
+    @Test fun renderFunctionalTypeInParenthesisWhenItIsReceiver() {
+        verifyMarkdownNode("renderFunctionalTypeInParenthesisWhenItIsReceiver")
+    }
+
     @Test fun multiplePlatforms() {
         verifyMultiplatformPackage(buildMultiplePlatforms("multiplatform"), "multiplatform")
     }
diff --git a/core/testdata/format/renderFunctionalTypeInParenthesisWhenItIsReceiver.kt b/core/testdata/format/renderFunctionalTypeInParenthesisWhenItIsReceiver.kt
new file mode 100644
index 00000000..84f78dfb
--- /dev/null
+++ b/core/testdata/format/renderFunctionalTypeInParenthesisWhenItIsReceiver.kt
@@ -0,0 +1,3 @@
+fun (suspend () -> Unit).foo() {
+
+}
\ No newline at end of file
diff --git a/core/testdata/format/renderFunctionalTypeInParenthesisWhenItIsReceiver.md b/core/testdata/format/renderFunctionalTypeInParenthesisWhenItIsReceiver.md
new file mode 100644
index 00000000..c9856976
--- /dev/null
+++ b/core/testdata/format/renderFunctionalTypeInParenthesisWhenItIsReceiver.md
@@ -0,0 +1,6 @@
+[test](test/index) / [kotlin.SuspendFunction0](test/kotlin.-suspend-function0/index)
+
+### Extensions for kotlin.SuspendFunction0
+
+| [foo](test/kotlin.-suspend-function0/foo) | `fun (suspend () -> Unit).foo(): Unit` |
+