From a1ed40fe56306ac9e4972a54d3132b138d6aec40 Mon Sep 17 00:00:00 2001
From: Sebastian Messmer <messmer@cryfs.org>
Date: Sat, 29 Dec 2018 11:58:38 +0100
Subject: [PATCH] fix

---
 src/cpp-utils/either.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cpp-utils/either.h b/src/cpp-utils/either.h
index 1fdcb3a2..f29bc490 100644
--- a/src/cpp-utils/either.h
+++ b/src/cpp-utils/either.h
@@ -120,7 +120,7 @@ namespace cpputils {
             }
         }
         // warning: opposed to the other left_opt variants, this one already moves the content and returns by value.
-        boost::optional<Left> left_opt() && noexcept(noexcept(boost::optional<Left>(std::move(_left)))) {
+        boost::optional<Left> left_opt() && noexcept(noexcept(boost::optional<Left>(std::move(std::declval<either<Left, Right>>()._left)))) {
             if (_side == Side::left) {
                 return std::move(_left);
             } else {
@@ -144,7 +144,7 @@ namespace cpputils {
             }
         }
         // warning: opposed to the other left_opt variants, this one already moves the content and returns by value.
-        boost::optional<Right> right_opt() && noexcept(noexcept(boost::optional<Right>(std::move(_right)))) {
+        boost::optional<Right> right_opt() && noexcept(noexcept(boost::optional<Right>(std::move(std::declval<either<Left, Right>>()._right)))) {
             if (_side == Side::right) {
                 return std::move(_right);
             } else {