From 54dc2fe2d32a92980b1e56ed7d35a10d2c47f685 Mon Sep 17 00:00:00 2001
From: Attila Krasznahorkay <Attila.Krasznahorkay@cern.ch>
Date: Wed, 13 May 2026 10:56:15 +0200
Subject: [PATCH] Made traccc::candidate_measurement work correctly with CUDA.

In some compiler combinations combining explicit __host__ and
__device__ labels with "= default" doesn't work.
---
 .../traccc/fitting/kalman_filter/measurement_selector.hpp       | 2 --
 1 file changed, 2 deletions(-)

diff --git a/core/include/traccc/fitting/kalman_filter/measurement_selector.hpp b/core/include/traccc/fitting/kalman_filter/measurement_selector.hpp
index 3cdd676d6a..101de498db 100644
--- a/core/include/traccc/fitting/kalman_filter/measurement_selector.hpp
+++ b/core/include/traccc/fitting/kalman_filter/measurement_selector.hpp
@@ -28,11 +28,9 @@ struct candidate_measurement {
     float chi2{std::numeric_limits<float>::max()};
 
     /// Define comparisons
-    TRACCC_HOST_DEVICE
     constexpr bool operator<=>(const candidate_measurement& other) const =
         default;
 };
-/// @}
 
 /// Associate a measurement to a candidate track
 struct measurement_selector {