From 474597777ce322c51dbe375a368792e034abc107 Mon Sep 17 00:00:00 2001
From: Alexander Nozik <altavir@gmail.com>
Date: Wed, 23 Jun 2021 08:20:22 +0300
Subject: [PATCH] Relaxed type restriction on `MetaConverter`

---
 CHANGELOG.md                                                | 1 +
 build.gradle.kts                                            | 2 +-
 .../dataforge/meta/transformations/MetaConverter.kt         | 6 +++---
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7dc1eeaa..df34ec50 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 - **API breaking** Descriptor no has a member property `defaultValue` instead of `defaultItem()` extension. It caches default value state on the first call. It is done because computing default on each call is too expensive.
 - Kotlin 1.5.10
 - Build tools 0.10.0
+- Relaxed type restriction on `MetaConverter`. Now nullables are available.
 
 ### Deprecated
 
diff --git a/build.gradle.kts b/build.gradle.kts
index c4293377..3c9b82ac 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -4,7 +4,7 @@ plugins {
 
 allprojects {
     group = "space.kscience"
-    version = "0.4.3"
+    version = "0.4.4-dev-1"
 }
 
 subprojects {
diff --git a/dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/transformations/MetaConverter.kt b/dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/transformations/MetaConverter.kt
index be7f054c..3945205c 100644
--- a/dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/transformations/MetaConverter.kt
+++ b/dataforge-meta/src/commonMain/kotlin/space/kscience/dataforge/meta/transformations/MetaConverter.kt
@@ -6,7 +6,7 @@ import space.kscience.dataforge.values.*
 /**
  * A converter of generic object to and from [TypedMetaItem]
  */
-public interface MetaConverter<T : Any> {
+public interface MetaConverter<T> {
     public fun itemToObject(item: MetaItem): T
     public fun objectToMetaItem(obj: T): MetaItem
 
@@ -120,5 +120,5 @@ public interface MetaConverter<T : Any> {
 public fun <T : Any> MetaConverter<T>.nullableItemToObject(item: MetaItem?): T? = item?.let { itemToObject(it) }
 public fun <T : Any> MetaConverter<T>.nullableObjectToMetaItem(obj: T?): MetaItem? = obj?.let { objectToMetaItem(it) }
 
-public fun <T : Any> MetaConverter<T>.metaToObject(meta: Meta): T = itemToObject(MetaItemNode(meta))
-public fun <T : Any> MetaConverter<T>.valueToObject(value: Value): T = itemToObject(MetaItemValue(value))
+public fun <T> MetaConverter<T>.metaToObject(meta: Meta): T = itemToObject(MetaItemNode(meta))
+public fun <T> MetaConverter<T>.valueToObject(value: Value): T = itemToObject(MetaItemValue(value))