From 9293f7072e3155aedfd00cc25f9dbcb5aad539c6 Mon Sep 17 00:00:00 2001
From: Finkman <sven.fink@wipotec.com>
Date: Wed, 9 Dec 2020 15:55:17 +0100
Subject: [PATCH] Suppress gcc warning on privates-only class (#2053)

Since gcc 9 it warns about is_streamable to have only private methods.
Add explicit default ctor instead of suppression
---
 include/fmt/ostream.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/fmt/ostream.h b/include/fmt/ostream.h
index 29c58ec1..411588c6 100644
--- a/include/fmt/ostream.h
+++ b/include/fmt/ostream.h
@@ -85,6 +85,8 @@ template <typename T, typename Char> class is_streamable {
   using result = decltype(test<T>(0));
 
  public:
+  is_streamable() = default;
+
   static const bool value = result::value;
 };