From aa4ed0e88b758fbe6b98050fdf4efa7f5ac24462 Mon Sep 17 00:00:00 2001
From: Christian Trott <crtrott@sandia.gov>
Date: Tue, 17 Dec 2024 14:41:09 -0700
Subject: [PATCH] Fix false warning on some compilers for unused variable

---
 include/experimental/__p0009_bits/utility.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/experimental/__p0009_bits/utility.hpp b/include/experimental/__p0009_bits/utility.hpp
index f7f39d60..a078eeb0 100644
--- a/include/experimental/__p0009_bits/utility.hpp
+++ b/include/experimental/__p0009_bits/utility.hpp
@@ -115,7 +115,7 @@ struct tuple_idx_matcher {
   using type = tuple_member<T, Idx>;
   template<class Other>
   MDSPAN_FUNCTION
-  constexpr auto operator | (Other v) const {
+  constexpr auto operator | ([[maybe_unused]] Other v) const {
     if constexpr (Idx == SearchIdx) { return *this; }
     else { return v; }
   }