From fc106eba515c8b1efb013634bbabec405ecf5b22 Mon Sep 17 00:00:00 2001
From: Naios <naios-dev@live.de>
Date: Sun, 26 Apr 2015 23:45:52 +0200
Subject: Core/Misc: Replace tc's optional with boost::optional. (very partial
 cherry-pick) * benefits from empty optimization (objects are only constructed
 if needed). * supports r-value references (move semantics) (boost >= 1.56.0).
 * preparation for c++14/17's std::optional and std::none_t. * add move
 constructor to CompactArray.

(cherry picked from commit 800d5d893964a82265577d3352d683035b589f78)
---
 src/common/Common.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src')

diff --git a/src/common/Common.h b/src/common/Common.h
index 8216c519746..aa04abacd30 100644
--- a/src/common/Common.h
+++ b/src/common/Common.h
@@ -44,6 +44,8 @@
 #include <cerrno>
 #include <csignal>
 
+#include <boost/optional.hpp>
+#include <boost/utility/in_place_factory.hpp>
 #include <boost/functional/hash.hpp>
 
 #include "Debugging/Errors.h"
@@ -152,6 +154,10 @@ typedef std::vector<std::string> StringVector;
 
 #define MAX_QUERY_LEN 32*1024
 
+//! Optional helper class to wrap optional values within.
+template <typename T>
+using Optional = boost::optional<T>;
+
 namespace Trinity
 {
     //! std::make_unique implementation (TODO: remove this once C++14 is supported)
-- 
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