perf: remove BlacklistedRecordProps

src/types/defaults.ts

@@ -46,12 +46,6 @@ export type DeepMergeMergeFunctionsDefaultURIs = Readonly<{
   DeepMergeOthersURI: DeepMergeLeafURI;
 }>;
 
-/**
- * A union of all the props that should not be included in type information for
- * merged records.
- */
-type BlacklistedRecordProps = "__proto__";
-
 /**
  * Deep merge records.
  */
@@ -61,12 +55,7 @@ export type DeepMergeRecordsDefaultHKT<
   M,
 > =
   Ts extends Readonly<readonly [unknown, ...Readonly<ReadonlyArray<unknown>>]>
-    ? FlatternAlias<
-        Omit<
-          DeepMergeRecordsDefaultHKTInternalProps<Ts, MF, M>,
-          BlacklistedRecordProps
-        >
-      >
+    ? FlatternAlias<DeepMergeRecordsDefaultHKTInternalProps<Ts, MF, M>>
     : {};
 
 /**
@@ -175,35 +164,35 @@ export type GetDeepMergeMergeFunctionsURIs<
 > = Readonly<{
   // prettier-ignore
   DeepMergeRecordsURI:
-     
+
     PMF["DeepMergeRecordsURI"] extends keyof DeepMergeMergeFunctionURItoKind<any, any, any>
       ? PMF["DeepMergeRecordsURI"]
       : DeepMergeRecordsDefaultURI;
 
   // prettier-ignore
   DeepMergeArraysURI:
-     
+
     PMF["DeepMergeArraysURI"] extends keyof DeepMergeMergeFunctionURItoKind<any, any, any>
       ? PMF["DeepMergeArraysURI"]
       : DeepMergeArraysDefaultURI;
 
   // prettier-ignore
   DeepMergeSetsURI:
-     
+
     PMF["DeepMergeSetsURI"] extends keyof DeepMergeMergeFunctionURItoKind<any, any, any>
       ? PMF["DeepMergeSetsURI"]
       : DeepMergeSetsDefaultURI;
 
   // prettier-ignore
   DeepMergeMapsURI:
-     
+
     PMF["DeepMergeMapsURI"] extends keyof DeepMergeMergeFunctionURItoKind<any, any, any>
       ? PMF["DeepMergeMapsURI"]
       : DeepMergeMapsDefaultURI;
 
   // prettier-ignore
   DeepMergeOthersURI:
-     
+
     PMF["DeepMergeOthersURI"] extends keyof DeepMergeMergeFunctionURItoKind<any, any, any>
       ? PMF["DeepMergeOthersURI"]
       : DeepMergeLeafURI;

src/types/options.ts

@@ -197,7 +197,6 @@ export type DeepMergeMergeFunctionUtils<
 /**
  * The utils provided to the merge functions.
  */
-
 export type DeepMergeMergeIntoFunctionUtils<
   in out M,
   MM extends DeepMergeBuiltInMetaData = DeepMergeBuiltInMetaData,

src/types/utils.ts

@@ -2,8 +2,11 @@
  * Flatten a complex type such as a union or intersection of objects into a
  * single object.
  */
-export type FlatternAlias<T> =
-  Is<T, unknown> extends true ? T : { [P in keyof T]: T[P] } & {};
+export type FlatternAlias<T> = T extends {} ? FlatternRecord<T> : T;
+
+type FlatternRecord<T extends {}> = {
+  [K in keyof T]: T[K];
+} & {};
 
 /**
  * Get the value of the given key in the given object.