From 0168b96b79db2627fdba77a8712956408aa081d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?louiz=E2=80=99?= <louiz@louiz.org>
Date: Wed, 4 Oct 2017 21:28:18 +0200
Subject: Add postgresql support

---
 src/utils/optional_bool.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/utils/optional_bool.hpp')

diff --git a/src/utils/optional_bool.hpp b/src/utils/optional_bool.hpp
index 59bbbab..867aca2 100644
--- a/src/utils/optional_bool.hpp
+++ b/src/utils/optional_bool.hpp
@@ -20,7 +20,7 @@ struct OptionalBool
     this->is_set = false;
   }
 
-  std::string to_string()
+  std::string to_string() const
   {
     if (this->is_set == false)
       return "unset";
@@ -33,3 +33,5 @@ struct OptionalBool
   bool is_set{false};
   bool value{false};
 };
+
+std::ostream& operator<<(std::ostream& os, const OptionalBool& o);
-- 
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