From a8731e91bc336d930ac66f985d3b88ed7cf2a7d7 Mon Sep 17 00:00:00 2001
From: jangko <jangko128@gmail.com>
Date: Tue, 12 Dec 2023 09:55:21 +0700
Subject: [PATCH] Support decoding nil ref object

---
 json_rpc/jsonmarshal.nim | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/json_rpc/jsonmarshal.nim b/json_rpc/jsonmarshal.nim
index bc2f872..82033df 100644
--- a/json_rpc/jsonmarshal.nim
+++ b/json_rpc/jsonmarshal.nim
@@ -71,6 +71,9 @@ proc fromJson*(n: JsonNode, argName: string, result: var int) =
   result = n.getInt()
 
 proc fromJson*[T: ref object](n: JsonNode, argName: string, result: var T) =
+  if n.kind == JNull:
+    result = nil
+    return
   n.kind.expect(JObject, argName)
   result = new T
   fromJson(n, argName, result[])