From 7ce74ce206065c3af0035583330b3c773086f21c Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Thu, 3 Nov 2016 00:44:53 +0300
Subject: Invent auto_fd, make use of it in fdstreams and process

---
 butl/optional | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'butl/optional')

diff --git a/butl/optional b/butl/optional
index 0ae7e7b..21d686c 100644
--- a/butl/optional
+++ b/butl/optional
@@ -11,8 +11,8 @@ namespace butl
 {
   // Simple optional class template while waiting for std::optional.
   //
-  struct nullopt_t {constexpr nullopt_t (int) {}};
-  constexpr const nullopt_t nullopt = 1;
+  struct nullopt_t {constexpr explicit nullopt_t (int) {}};
+  constexpr const nullopt_t nullopt (1);
 
   template <typename T>
   class optional
-- 
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