fix(types): allow using functions on the PropTypes (#9733)

close #9692

Author: pikax

types/options.d.ts

@@ -144,7 +144,7 @@ export interface RenderContext<Props=DefaultProps> {
   injections: any
 }
 
-export type Prop<T> = { (): T } | { new(...args: any[]): T & object }
+export type Prop<T> = { (): T } | { new(...args: any[]): T & object } | { new(...args: string[]): Function }
 
 export type PropType<T> = Prop<T> | Prop<T>[];
 

types/test/options-test.ts

@@ -68,12 +68,14 @@ interface ICat {
   foo: any,
   bar: object
 }
+type ConfirmCallback = (confirm: boolean) => void;
 
 Vue.component('union-prop', {
   props: {
     cat: Object as PropType<ICat>,
     complexUnion: { type: [User, Number] as PropType<User | number> },
     kittyUser: Object as PropType<ICat & IUser>,
+    callback: Function as PropType<ConfirmCallback>,
     mixed: [RegExp, Array],
     object: [Cat, User],
     primitive: [String, Number],
@@ -84,6 +86,7 @@ Vue.component('union-prop', {
     this.cat;
     this.complexUnion;
     this.kittyUser;
+    this.callback(true);
     this.mixed;
     this.object;
     this.primitive;
@@ -281,6 +284,18 @@ Vue.component('component', {
   delimiters: ["${", "}"]
 });
 
+
+Vue.component('custom-prop-type-function', {
+  props: {
+    callback: Function as PropType<(confirm: boolean) => void>,
+  },
+  methods: {
+    confirm(){
+      this.callback(true);
+    }
+  }
+});
+
 Vue.component('provide-inject', {
   provide: {
     foo: 1