chore(release): 4.2.0 [skip ci]

# [4.2.0](v4.1.0...v4.2.0) (2022-06-15) ### Features * export types for module resolution node 16 ([20241c5](20241c5)) ### Performance Improvements * **ts:** add variance annotations ([cecc9db](cecc9db)) * **ts:** use extends constraints on infer ([f053e76](f053e76))
RebeccaStevens · Jun 15, 2022 · 63581a5 · 63581a5
1 parent c65ede5
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,6 +1,19 @@
 # Changelog
 All notable changes to this project will be documented in this file. Dates are displayed in UTC.
 
+# [4.2.0](https://github.com/RebeccaStevens/deepmerge-ts/compare/v4.1.0...v4.2.0) (2022-06-15)
+
+
+### Features
+
+* export types for module resolution node 16 ([20241c5](https://github.com/RebeccaStevens/deepmerge-ts/commit/20241c5bdffcc77025ea778257193f1afbe40768))
+
+
+### Performance Improvements
+
+* **ts:** add variance annotations ([cecc9db](https://github.com/RebeccaStevens/deepmerge-ts/commit/cecc9dbcfc68335f04372e2fa339a347f71c90bc))
+* **ts:** use extends constraints on infer ([f053e76](https://github.com/RebeccaStevens/deepmerge-ts/commit/f053e76221fb790f1dead0b2b5c9a9f4432cb1d8))
+
 # [4.1.0](https://github.com/RebeccaStevens/deepmerge-ts/compare/v4.0.4...v4.1.0) (2022-06-13)
 
 

diff --git a/dist/deno/types/defaults.ts b/dist/deno/types/defaults.ts
@@ -108,17 +108,18 @@ type DeepMergeRecordsDefaultHKTInternalPropValueHelper<
   K extends PropertyKey,
   M,
   Acc extends ReadonlyArray<unknown>
-> = Ts extends readonly [infer Head, ...infer Rest]
-  ? Head extends Readonly<Record<PropertyKey, unknown>>
-    ? Rest extends readonly [unknown, ...ReadonlyArray<unknown>]
-      ? DeepMergeRecordsDefaultHKTInternalPropValueHelper<
-          Rest,
-          K,
-          M,
-          [...Acc, ValueOfKey<Head, K>]
-        >
-      : [...Acc, ValueOfKey<Head, K>]
-    : never
+> = Ts extends readonly [
+  infer Head extends Readonly<Record<PropertyKey, unknown>>,
+  ...infer Rest
+]
+  ? Rest extends readonly [unknown, ...ReadonlyArray<unknown>]
+    ? DeepMergeRecordsDefaultHKTInternalPropValueHelper<
+        Rest,
+        K,
+        M,
+        [...Acc, ValueOfKey<Head, K>]
+      >
+    : [...Acc, ValueOfKey<Head, K>]
   : never;
 
 /**
@@ -138,15 +139,16 @@ type DeepMergeArraysDefaultHKTHelper<
   MF extends DeepMergeMergeFunctionsURIs,
   M,
   Acc extends ReadonlyArray<unknown>
-> = Ts extends readonly [infer Head, ...infer Rest]
-  ? Head extends ReadonlyArray<unknown>
-    ? Rest extends readonly [
-        ReadonlyArray<unknown>,
-        ...ReadonlyArray<ReadonlyArray<unknown>>
-      ]
-      ? DeepMergeArraysDefaultHKTHelper<Rest, MF, M, [...Acc, ...Head]>
-      : [...Acc, ...Head]
-    : never
+> = Ts extends readonly [
+  infer Head extends ReadonlyArray<unknown>,
+  ...infer Rest
+]
+  ? Rest extends readonly [
+      ReadonlyArray<unknown>,
+      ...ReadonlyArray<ReadonlyArray<unknown>>
+    ]
+    ? DeepMergeArraysDefaultHKTHelper<Rest, MF, M, [...Acc, ...Head]>
+    : [...Acc, ...Head]
   : never;
 
 /**

diff --git a/dist/deno/types/merging.ts b/dist/deno/types/merging.ts
@@ -20,7 +20,7 @@ import type {
 export interface DeepMergeMergeFunctionURItoKind<
   Ts extends ReadonlyArray<unknown>,
   MF extends DeepMergeMergeFunctionsURIs,
-  M
+  in out M
 > {
   readonly DeepMergeLeafURI: DeepMergeLeaf<Ts>;
   readonly DeepMergeRecordsDefaultURI: DeepMergeRecordsDefaultHKT<Ts, MF, M>;

diff --git a/dist/deno/types/options.ts b/dist/deno/types/options.ts
@@ -7,19 +7,22 @@ import type { DeepMergeBuiltInMetaData } from "./merging.ts";
  * The options the user can pass to customize deepmerge.
  */
 export type DeepMergeOptions<
-  M,
+  in out M,
   MM extends Readonly<Record<PropertyKey, unknown>> = DeepMergeBuiltInMetaData
 > = Partial<DeepMergeOptionsFull<M, MM & DeepMergeBuiltInMetaData>>;
 
-type MetaDataUpdater<M, MM extends DeepMergeBuiltInMetaData> = (
+type MetaDataUpdater<in out M, MM extends DeepMergeBuiltInMetaData> = (
   previousMeta: M | undefined,
   metaMeta: Readonly<Partial<MM>>
 ) => M;
 
 /**
  * All the options the user can pass to customize deepmerge.
  */
-type DeepMergeOptionsFull<M, MM extends DeepMergeBuiltInMetaData> = Readonly<{
+type DeepMergeOptionsFull<
+  in out M,
+  MM extends DeepMergeBuiltInMetaData
+> = Readonly<{
   mergeRecords: DeepMergeMergeFunctions<M, MM>["mergeRecords"] | false;
   mergeArrays: DeepMergeMergeFunctions<M, MM>["mergeArrays"] | false;
   mergeMaps: DeepMergeMergeFunctions<M, MM>["mergeMaps"] | false;
@@ -33,7 +36,7 @@ type DeepMergeOptionsFull<M, MM extends DeepMergeBuiltInMetaData> = Readonly<{
  * All the merge functions that deepmerge uses.
  */
 type DeepMergeMergeFunctions<
-  M,
+  in M,
   MM extends DeepMergeBuiltInMetaData
 > = Readonly<{
   mergeRecords: <
@@ -86,7 +89,7 @@ type DeepMergeMergeFunctions<
  * The utils provided to the merge functions.
  */
 export type DeepMergeMergeFunctionUtils<
-  M,
+  in out M,
   MM extends DeepMergeBuiltInMetaData
 > = Readonly<{
   mergeFunctions: DeepMergeMergeFunctions<M, MM>;