From 33e569acf977252bd41e4cfdc21a7fd130dd5c2c Mon Sep 17 00:00:00 2001
From: EdamAmex <121654029+EdamAme-x@users.noreply.github.com>
Date: Fri, 8 Nov 2024 08:04:06 +0900
Subject: [PATCH 1/2] fix(types): argument type and response type will be the
 same

---
 index.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.ts b/index.ts
index 9f28fe3..5c278ee 100644
--- a/index.ts
+++ b/index.ts
@@ -19,7 +19,7 @@ export type JsonValue = number | string | boolean | null | JsonValue[] | { [key:
  *              `Set`, `Buffer`, ... are not allowed.
  * @returns The cloned JSON value.
  */
-export default function cloneJSON(value: JsonValue): JsonValue {
+export default function cloneJSON<V extends JsonValue>(value: V): V {
     if (typeof value !== 'object' || value === null) {
         return value;
     } else if (Array.isArray(value)) {

From 0b43c6aa7fa7f3e4c4c2d17fb383df272e9d48c4 Mon Sep 17 00:00:00 2001
From: EdamAmex <121654029+EdamAme-x@users.noreply.github.com>
Date: Fri, 8 Nov 2024 08:11:06 +0900
Subject: [PATCH 2/2] Update index.ts

---
 index.ts | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/index.ts b/index.ts
index 5c278ee..9e547c2 100644
--- a/index.ts
+++ b/index.ts
@@ -8,24 +8,19 @@
  * @module
  */
 
-export type JsonValue = number | string | boolean | null | JsonValue[] | { [key: string]: JsonValue };
+export type JsonPrimitive = number | string | boolean | null;
+export type JsonArray = JsonValue[];
+export type JsonObject = { [key: string]: JsonValue };
 
-/**
- * This function clones the given JSON value.
- *
- * @param value The JSON value to be cloned. There are two invariants. 1) It must not contain circles
- *              as JSON does not allow it. This function will cause infinite loop for such values by
- *              design. 2) It must contain JSON values only. Other values like `Date`, `Regexp`, `Map`,
- *              `Set`, `Buffer`, ... are not allowed.
- * @returns The cloned JSON value.
- */
-export default function cloneJSON<V extends JsonValue>(value: V): V {
+export type JsonValue = JsonPrimitive | JsonArray | JsonObject;
+
+function _cloneJSON(value: JsonValue): JsonValue {
     if (typeof value !== 'object' || value === null) {
         return value;
     } else if (Array.isArray(value)) {
         return value.map(e => (typeof e !== 'object' || e === null ? e : cloneJSON(e)));
     } else {
-        const ret: { [key: string]: JsonValue } = {};
+        const ret: JsonObject = {};
         for (const k in value) {
             const v = value[k];
             ret[k] = typeof v !== 'object' || v === null ? v : cloneJSON(v);
@@ -33,3 +28,17 @@ export default function cloneJSON<V extends JsonValue>(value: V): V {
         return ret;
     }
 }
+
+/**
+ * This function clones the given JSON value.
+ *
+ * @param value The JSON value to be cloned. There are two invariants. 1) It must not contain circles
+ *              as JSON does not allow it. This function will cause infinite loop for such values by
+ *              design. 2) It must contain JSON values only. Other values like `Date`, `Regexp`, `Map`,
+ *              `Set`, `Buffer`, ... are not allowed.
+ * @returns The cloned JSON value.
+ */
+function cloneJSON<V extends JsonValue>(value: V): V {
+    // note: autoregressive function
+    return _cloneJSON(value) as V
+}