From adc60de44ccebc61a118d622cc05c64b1aa7ac9a Mon Sep 17 00:00:00 2001
From: Vincent Chabannes <vincent.chabannes@feelpp.org>
Date: Wed, 21 Aug 2024 23:59:21 +0200
Subject: [PATCH] fix #1

---
 examples/ex1.cpp    | 1 +
 test/unit-cvref.cpp | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/examples/ex1.cpp b/examples/ex1.cpp
index 83d1bf9..d6a7b64 100644
--- a/examples/ex1.cpp
+++ b/examples/ex1.cpp
@@ -1,6 +1,7 @@
 #include <napp/na.hpp>
 #include <tuple>
 #include <iostream>
+#include <string>
 
 constexpr auto& _parameters = NA::identifier<struct parameters_tag>;
 constexpr auto& _task = NA::identifier<struct task_tag>;
diff --git a/test/unit-cvref.cpp b/test/unit-cvref.cpp
index 8ab4f01..c5254a3 100644
--- a/test/unit-cvref.cpp
+++ b/test/unit-cvref.cpp
@@ -40,7 +40,7 @@ std::string test_nonconst( Ts && ... v )
     auto args = NA::make_arguments( std::forward<Ts>(v)... );
     auto && data = args.get(_data);
     auto && data2 = args.get_else(_data2,data);
-    auto && data3 = args.get_else_invocable(_data3,[&data]() -> decltype(auto) { return data; });
+    auto && data3 = args.get_else_invocable(_data3,[&data]() -> decltype(auto) { return std::forward<decltype(data)>( data ); });
 
     data.setI(12);
     data2.setI(13);
@@ -57,7 +57,7 @@ std::string test_const( Ts && ... v )
     auto args = NA::make_arguments( std::forward<Ts>(v)... );
     auto && data = args.get(_data);
     auto && data2 = args.get_else(_data2,data);
-    auto && data3 = args.get_else_invocable(_data3,[&data]() -> decltype(auto) { return data; });
+    auto && data3 = args.get_else_invocable(_data3,[&data]() -> decltype(auto) { return std::forward<decltype(data)>( data ); });
 
     static_assert( std::is_const_v<std::remove_reference_t<decltype(data)>>, "should be const" );
     static_assert( std::is_const_v<std::remove_reference_t<decltype(data2)>>, "should be const" );