From 159ab71495ed07e44b730511f57080cd59764d9d Mon Sep 17 00:00:00 2001
From: nanoric <nanoric@qq.com>
Date: Tue, 19 Mar 2019 06:36:18 -0400
Subject: [PATCH] =?UTF-8?q?[Fix]=20=E6=9B=B4=E6=96=B0autocxxpy=E8=84=9A?=
 =?UTF-8?q?=E6=9C=AC?=
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---
 vnpy/api/oes/include/autocxxpy/property_helper.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/vnpy/api/oes/include/autocxxpy/property_helper.hpp b/vnpy/api/oes/include/autocxxpy/property_helper.hpp
index fa020113..ce51fc01 100644
--- a/vnpy/api/oes/include/autocxxpy/property_helper.hpp
+++ b/vnpy/api/oes/include/autocxxpy/property_helper.hpp
@@ -19,6 +19,10 @@ namespace autocxxpy
         {
             return val;
         }
+        auto &operator()(const string_literal<size> &val) const noexcept
+        {
+            return val;
+        }
     };
 
     template <class tag, size_t size>