perf: remove BlacklistedRecordProps

RebeccaStevens · May 19, 2024 · 19d4944 · 19d4944
1 parent 1982e56
commit 19d4944
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Showing 2 changed files with 6 additions and 14 deletions.
diff --git a/src/types/defaults.ts b/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>>
     : {};
 
 /**

diff --git a/src/types/utils.ts b/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.