From 7d6feffd56cde7d6e5d9dd53b358f5afa8e4eb47 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20Ka=CC=88fer?= <mail@kkaefer.com>
Date: Wed, 22 Oct 2014 16:29:10 +0200
Subject: replace boost optional with mapbox optional

---
 include/mbgl/util/variant.hpp | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

(limited to 'include/mbgl/util/variant.hpp')

diff --git a/include/mbgl/util/variant.hpp b/include/mbgl/util/variant.hpp
index 1eca5160c7..3b5659425a 100644
--- a/include/mbgl/util/variant.hpp
+++ b/include/mbgl/util/variant.hpp
@@ -4,7 +4,6 @@
 #include <utility>
 #include <typeinfo>
 #include <type_traits>
-#include <algorithm> // std::move/swap
 #include <stdexcept> // runtime_error
 #include <new> // operator new
 #include <cstddef> // size_t
@@ -515,22 +514,13 @@ public:
     VARIANT_INLINE variant(no_init)
         : type_index(detail::invalid_value) {}
 
+    // http://isocpp.org/blog/2012/11/universal-references-in-c11-scott-meyers
     template <typename T, class = typename std::enable_if<
-                         detail::is_valid_type<T, Types...>::value>::type>
-    VARIANT_INLINE explicit variant(T const& val) noexcept
-        : type_index(detail::value_traits<T, Types...>::index)
-    {
-        constexpr std::size_t index = sizeof...(Types) - detail::value_traits<T, Types...>::index - 1;
-        using target_type = typename detail::select_type<index, Types...>::type;
-        new (&data) target_type(val);
-    }
-
-    template <typename T, class = typename std::enable_if<
-                          detail::is_valid_type<T, Types...>::value>::type>
+                          detail::is_valid_type<typename std::remove_reference<T>::type, Types...>::value>::type>
     VARIANT_INLINE variant(T && val) noexcept
-        : type_index(detail::value_traits<T, Types...>::index)
+        : type_index(detail::value_traits<typename std::remove_reference<T>::type, Types...>::index)
     {
-        constexpr std::size_t index = sizeof...(Types) - detail::value_traits<T, Types...>::index - 1;
+        constexpr std::size_t index = sizeof...(Types) - detail::value_traits<typename std::remove_reference<T>::type, Types...>::index - 1;
         using target_type = typename detail::select_type<index, Types...>::type;
         new (&data) target_type(std::forward<T>(val)); // nothrow
     }
@@ -565,7 +555,7 @@ public:
     template <typename T>
     VARIANT_INLINE variant<Types...>& operator=(T && rhs) noexcept
     {
-        variant<Types...> temp(std::move(rhs));
+        variant<Types...> temp(std::forward<T>(rhs));
         swap(*this, temp);
         return *this;
     }
-- 
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