From c833bf564ca95af0ff88e763d6d896c133c5210e Mon Sep 17 00:00:00 2001
From: Shewer Lu <shewer@gmail.com>
Date: Wed, 25 Oct 2023 01:25:24 +0800
Subject: [PATCH] Update types_ext.cc

---
 src/types_ext.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/types_ext.cc b/src/types_ext.cc
index d66f0e9..95b3343 100644
--- a/src/types_ext.cc
+++ b/src/types_ext.cc
@@ -23,7 +23,7 @@ using namespace rime;
 using boost::optional;
 
 namespace {
-
+using optional ns::optional;
 template<typename> using void_t = void;
 
 template<typename T, typename = void>