[typescript] Map constructor accept a list of string as key

jdeniau · jdeniau · commit 03ca1edc7ea4 · 2021-07-06T16:20:40.000+02:00
diff --git a/type-definitions/Immutable.d.ts b/type-definitions/Immutable.d.ts
@@ -765,6 +765,7 @@ declare module Immutable {
   export function Map<K, V>(): Map<K, V>;
   export function Map<K, V>(collection: Iterable<[K, V]>): Map<K, V>;
   export function Map<V>(obj: { [key: string]: V }): Map<string, V>;
+  export function Map<K extends string, V>(obj: { [P in K]?: V }): Map<K, V>;
 
   export interface Map<K, V> extends Collection.Keyed<K, V> {
     /**
diff --git a/type-definitions/ts-tests/map.ts b/type-definitions/ts-tests/map.ts
@@ -26,6 +26,18 @@ import { Map, List } from '../../';
   // No longer works in typescript@>=3.9
   // // $ExpectError - TypeScript does not support Lists as tuples
   // Map(List([List(['a', 'b'])]));
+
+  // $ExpectError
+  const invalidNumberMap: Map<number, number> = Map();
+
+  // $ExpectType Map<"status", string>
+  Map<'status', string>({ status: 'paid' });
+
+  // $ExpectType Map<"status" | "amount", string>
+  Map<'status' | 'amount', string>({ status: 'paid' });
+
+  // $ExpectError
+  Map<'status', string>({ status: 'paid', amount: 10 });
 }
 
 {
