From 0b2b77275cab413dd2e418d20be93364e07c05ff Mon Sep 17 00:00:00 2001
From: conrad <conrad@localhost.localdomain>
Date: Wed, 22 Sep 2021 12:03:42 +1000
Subject: [PATCH] add arma_warn_unused attrib

---
 include/armadillo_bits/BaseCube_bones.hpp | 2 +-
 include/armadillo_bits/BaseCube_meat.hpp  | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/armadillo_bits/BaseCube_bones.hpp b/include/armadillo_bits/BaseCube_bones.hpp
index 3c96e048..5e88a753 100644
--- a/include/armadillo_bits/BaseCube_bones.hpp
+++ b/include/armadillo_bits/BaseCube_bones.hpp
@@ -24,7 +24,7 @@
 template<typename elem_type, typename derived>
 struct BaseCube_eval_Cube
   {
-  arma_inline const derived& eval() const;
+  arma_inline arma_warn_unused const derived& eval() const;
   };
 
 
diff --git a/include/armadillo_bits/BaseCube_meat.hpp b/include/armadillo_bits/BaseCube_meat.hpp
index ac90d99d..af7b3c30 100644
--- a/include/armadillo_bits/BaseCube_meat.hpp
+++ b/include/armadillo_bits/BaseCube_meat.hpp
@@ -417,6 +417,7 @@ BaseCube<elem_type,derived>::has_nan() const
 
 template<typename elem_type, typename derived>
 arma_inline
+arma_warn_unused
 const derived&
 BaseCube_eval_Cube<elem_type, derived>::eval() const
   {