fix: correctly extract type of last passed argument

mesqueeb · Nov 15, 2022 · d0a1dc4 · d0a1dc4
1 parent ce00d9d
commit d0a1dc4
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Showing 2 changed files with 11 additions and 3 deletions.
diff --git a/src/merge.ts b/src/merge.ts
@@ -155,3 +155,9 @@ export function mergeAndConcat<T, Tn extends unknown[]>(
 // const ba1: Barguments = { key: 'value1' }
 // const ba2: Barguments = { key: 'value2' }
 // const ba = merge(ba1, ba2)
+
+// interface Carguments {
+//   key: string
+// }
+// const ca = merge<Carguments, Carguments[]>({ key: 'value1' }, { key: 'value2' })
+// type P = Pop<Carguments[]>
diff --git a/src/typeUtils/List.ts b/src/typeUtils/List.ts
@@ -29,7 +29,9 @@ export type Length<L extends List> = L['length']
  * ```
  */
 export type Pop<L extends List> = L extends readonly []
-  ? L
-  : L extends readonly [...any, infer Last]
+  ? never
+  : L extends [...unknown[], infer Last]
   ? Last
-  : L
+  : L extends (infer T)[]
+  ? T
+  : never