From 0dbd5aaadd07ea5ea2923e3e2b83982472051fa2 Mon Sep 17 00:00:00 2001
From: Glen Fernandes <glen.fernandes@gmail.com>
Date: Sat, 23 May 2020 19:53:16 -0400
Subject: [PATCH] Update empty_value constructors

---
 doc/empty_value.qbk                |  2 +-
 include/boost/core/empty_value.hpp | 12 ++++++------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/doc/empty_value.qbk b/doc/empty_value.qbk
index a8fe72d..f693aeb 100644
--- a/doc/empty_value.qbk
+++ b/doc/empty_value.qbk
@@ -90,7 +90,7 @@ public:
     empty_value() = default;
 
     template<class... Args>
-    explicit empty_value(empty_init_t, Args&&... args);
+    empty_value(empty_init_t, Args&&... args);
 
     const T& get() const noexcept;
 
diff --git a/include/boost/core/empty_value.hpp b/include/boost/core/empty_value.hpp
index 289b05b..2ac2331 100644
--- a/include/boost/core/empty_value.hpp
+++ b/include/boost/core/empty_value.hpp
@@ -59,9 +59,9 @@ public:
 
 #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
 #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
-    template<class... Args>
-    explicit empty_value(boost::empty_init_t, Args&&... args)
-        : value_(std::forward<Args>(args)...) { }
+    template<class U, class... Args>
+    empty_value(boost::empty_init_t, U&& value, Args&&... args)
+        : value_(std::forward<U>(value), std::forward<Args>(args)...) { }
 #else
     template<class U>
     empty_value(boost::empty_init_t, U&& value)
@@ -107,9 +107,9 @@ public:
 
 #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
 #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
-    template<class... Args>
-    explicit empty_value(boost::empty_init_t, Args&&... args)
-        : T(std::forward<Args>(args)...) { }
+    template<class U, class... Args>
+    empty_value(boost::empty_init_t, U&& value, Args&&... args)
+        : T(std::forward<U>(value), std::forward<Args>(args)...) { }
 #else
     template<class U>
     empty_value(boost::empty_init_t, U&& value)