[WIP] Allows reflection

src/ArrayType.js

@@ -48,6 +48,7 @@ class ArrayType extends Type {
    * )
    */
   of(type, errorMessage) {
+    this.ofType = type;
     super.pushRule(items => {
       let valids = items.map(value => type.check(value));
       let errors = valids.filter(item => item.hasError) || [];

src/ObjectType.js

@@ -18,6 +18,7 @@ class ObjectType extends Type {
    * })
    */
   shape(types) {
+    this.shapeType = types;
     super.pushRule(values => {
       let valids = Object.entries(types).map(item => {
         let key = item[0];

types/ArrayType.d.ts

@@ -3,6 +3,7 @@ import { Type } from './Type';
 
 export declare class ArrayType<ValueType = any, DataType = any, ErrorMsgType = string> extends Type<ValueType, DataType, ErrorMsgType> {
     readonly name: 'array';
+    readonly ofType: CheckType<ValueType, DataType, ErrorMsgType>;
     constructor(errorMessage?: ErrorMsgType);
     rangeLength: (minLength: number, maxLength: number, errorMessage?: ErrorMsgType) => this;
     minLength: (minLength: number, errorMessage?: ErrorMsgType) => this;

types/ObjectType.d.ts

@@ -3,6 +3,7 @@ import { Type } from './Type';
 
 export declare class ObjectType<ValueType = any, DataType = any, ErrorMsgType = string> extends Type<ValueType, DataType, ErrorMsgType> {
     readonly name: 'object';
+    readonly shapeType: SchemaDeclaration<ValueType, ErrorMsgType>;
     constructor(errorMessage?: ErrorMsgType);
     shape: (types: SchemaDeclaration<ValueType, ErrorMsgType>) => this;
 }