From b6af0c5f26506b1618f3e352e5fbc3188bacefa5 Mon Sep 17 00:00:00 2001
From: Jolan Rensen <jolan.rensen@jetbrains.com>
Date: Mon, 16 Sep 2024 11:55:59 +0200
Subject: [PATCH] added special check for function types in debug mode

---
 .../kotlinx/dataframe/impl/columns/DataColumnImpl.kt         | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/columns/DataColumnImpl.kt b/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/columns/DataColumnImpl.kt
index eac43db02b..cdc6eaae77 100644
--- a/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/columns/DataColumnImpl.kt
+++ b/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/columns/DataColumnImpl.kt
@@ -9,6 +9,8 @@ import org.jetbrains.kotlinx.dataframe.kind
 import kotlin.reflect.KClass
 import kotlin.reflect.KType
 import kotlin.reflect.full.isSubclassOf
+import kotlin.reflect.full.isSubtypeOf
+import kotlin.reflect.typeOf
 
 internal abstract class DataColumnImpl<T>(
     protected val values: List<T>,
@@ -22,6 +24,9 @@ internal abstract class DataColumnImpl<T>(
         when {
             this == null -> type.isMarkedNullable
 
+            // special case since functions are often stored as a $$Lambda$... class, the subClassOf check would fail
+            this is Function<*> && type.isSubtypeOf(typeOf<Function<*>?>()) -> true
+
             this.isPrimitiveArray ->
                 type.isPrimitiveArray &&
                     this!!::class.qualifiedName == type.classifier?.let { (it as KClass<*>).qualifiedName }