Compare feature

src/compare.ts

@@ -0,0 +1,19 @@
+/**
+ * Comapre in deep A and B
+ */
+export function equals<T>(a: T, b: T): boolean;
+/**
+ * @internal
+ */
+export function equals<T>(_a: T, _b: T): boolean {
+  halt("equals");
+}
+
+/**
+ * @internal
+ */
+function halt(name: string): never {
+  throw new Error(
+    `Error on typia.compare.${name}(): no transform has been configured. Read and follow https://typia.io/docs/setup please.`,
+  );
+}

src/factories/MetadataCollection.ts

@@ -76,6 +76,16 @@ export class MetadataCollection {
     return [...this.tuples_.values()];
   }
 
+  public findObjectType(target: MetadataObjectType) {
+    // Add weakmap to index it and avoid finding O(n)
+    for (const [key, object] of this.objects_.entries()) {
+      if (object === target) {
+        return key;
+      }
+    }
+    return undefined;
+  }
+
   private getName(checker: ts.TypeChecker, type: ts.Type): string {
     const name: string = (() => {
       const str: string = TypeFactory.getFullName({

src/factories/internal/metadata/iterate_metadata.ts

@@ -30,6 +30,9 @@ export const iterate_metadata = (props: IMetadataIteratorProps): void => {
     });
     return;
   }
+  if (props.type.isClass()) {
+    props.metadata.class = true;
+  }
   // CHECK SPECIAL CASES
   if (
     (props.explore.aliased !== true && iterate_metadata_alias(props)) ||

src/module.ts

@@ -13,6 +13,7 @@ export * as notations from "./notations";
 export * as protobuf from "./protobuf";
 export * as reflect from "./reflect";
 export * as tags from "./tags";
+export * as compare from "./compare";
 
 export * from "./schemas/metadata/IJsDocTagInfo";
 export * from "./schemas/json/IJsonApplication";