From 51dd98f49df073268977e695fa15b82ceabf91b1 Mon Sep 17 00:00:00 2001
From: Mike Zozu <jaat-quod@yandex.ru>
Date: Tue, 15 Dec 2020 21:59:52 +0300
Subject: [PATCH] fix is_streamable trait

---
 include/argparse/argparse.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/argparse/argparse.hpp b/include/argparse/argparse.hpp
index 7f285b2..4439488 100644
--- a/include/argparse/argparse.hpp
+++ b/include/argparse/argparse.hpp
@@ -73,7 +73,7 @@ struct is_streamable : std::false_type {};
 
 template <typename T>
 struct is_streamable<
-    T, std::void_t<decltype(std::declval<std::ostream>() << std::declval<T>())>>
+    T, std::void_t<decltype(std::declval<std::ostream&>() << std::declval<T>())>>
   : std::true_type {};
 
 template <typename T>