+ svalue<TimeJD> support

json/json_functions_bno.h

-#ifndef JSONFUNCTIONSBNO_H
-#define JSONFUNCTIONSBNO_H
+#pragma once
 
 #include "TM.h"
 #include "TimeFunctions.h"
@@ -91,4 +90,25 @@ static void PutValue(jsonalloc& alc, jsonval& ss, const std::string& conName, co
     ss.AddMember(jname, jvalue, alc);
 }
 
-#endif
+
+static bool loadjson(const jsonval& parent, const std::string& key, svalue<TimeJD>& value, const bool exist = true)
+{
+    jsonval::ConstMemberIterator itr;
+
+    bool* loaded = nullptr;
+    if (!extract_value(parent, key, exist, loaded, itr)) {
+        return false;
+    }
+
+    const jsonval& a = itr->value;
+
+    if (a.IsString()) {
+        value = StrToDate(a.GetString());
+    }
+    else {
+        throw (Exp() << "element '" << key << "'" << " has unexpected format '");
+    }
+
+    return true;
+}
+ 
\ No newline at end of file