From 42a257e17cf869ffcc6f75e3fdb5ac845a421798 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Mon, 14 Jun 2021 03:59:44 +0300
Subject: [PATCH] Add operator<< for error_condition

---
 include/boost/system/detail/error_condition.hpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/boost/system/detail/error_condition.hpp b/include/boost/system/detail/error_condition.hpp
index 653b812..234ef2b 100644
--- a/include/boost/system/detail/error_condition.hpp
+++ b/include/boost/system/detail/error_condition.hpp
@@ -219,6 +219,17 @@ public:
     }
 
 #endif
+
+    template<class Ch, class Tr>
+        inline friend std::basic_ostream<Ch, Tr>&
+        operator<< (std::basic_ostream<Ch, Tr>& os, error_condition const & en)
+    {
+        {
+            os << "cond:" << en.category().name() << ':' << en.value();
+        }
+
+        return os;
+    }
 };
 
 } // namespace system