Less restrictive constraints in Parameters and ReturnType types

ahejlsberg · ahejlsberg · commit e7ad76ddc851 · 2019-02-02T09:28:21.000-08:00
diff --git a/src/lib/es5.d.ts b/src/lib/es5.d.ts
@@ -1451,22 +1451,22 @@ type NonNullable<T> = T extends null | undefined ? never : T;
 /**
  * Obtain the parameters of a function type in a tuple
  */
-type Parameters<T extends (...args: any[]) => any> = T extends (...args: infer P) => any ? P : never;
+type Parameters<T extends (...args: any) => any> = T extends (...args: infer P) => any ? P : never;
 
 /**
  * Obtain the parameters of a constructor function type in a tuple
  */
-type ConstructorParameters<T extends new (...args: any[]) => any> = T extends new (...args: infer P) => any ? P : never;
+type ConstructorParameters<T extends new (...args: any) => any> = T extends new (...args: infer P) => any ? P : never;
 
 /**
  * Obtain the return type of a function type
  */
-type ReturnType<T extends (...args: any[]) => any> = T extends (...args: any[]) => infer R ? R : any;
+type ReturnType<T extends (...args: any) => any> = T extends (...args: any) => infer R ? R : any;
 
 /**
  * Obtain the return type of a constructor function type
  */
-type InstanceType<T extends new (...args: any[]) => any> = T extends new (...args: any[]) => infer R ? R : any;
+type InstanceType<T extends new (...args: any) => any> = T extends new (...args: any) => infer R ? R : any;
 
 /**
  * Marker for contextual 'this' type
