From f3a945fec4241eaef9c663e22849137b08a4129d Mon Sep 17 00:00:00 2001
From: Marcel Walter <marcel.walter@tum.de>
Date: Thu, 8 Dec 2022 10:19:57 +0100
Subject: [PATCH] :zap: Made distance functions `constexpr`

---
 include/fiction/algorithms/path_finding/distance.hpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/fiction/algorithms/path_finding/distance.hpp b/include/fiction/algorithms/path_finding/distance.hpp
index da5eff958..8d97ad960 100644
--- a/include/fiction/algorithms/path_finding/distance.hpp
+++ b/include/fiction/algorithms/path_finding/distance.hpp
@@ -28,8 +28,8 @@ namespace fiction
  * @return Manhattan distance between source and target.
  */
 template <typename Lyt, typename Dist = uint64_t>
-[[nodiscard]] Dist manhattan_distance([[maybe_unused]] const Lyt& lyt, const coordinate<Lyt>& source,
-                                      const coordinate<Lyt>& target) noexcept
+[[nodiscard]] constexpr Dist manhattan_distance([[maybe_unused]] const Lyt& lyt, const coordinate<Lyt>& source,
+                                                const coordinate<Lyt>& target) noexcept
 {
     static_assert(is_coordinate_layout_v<Lyt>, "Lyt is not a coordinate layout");
     static_assert(std::is_integral_v<Dist>, "Dist is not an integral type");
@@ -50,8 +50,8 @@ template <typename Lyt, typename Dist = uint64_t>
  * @return Euclidean distance between source and target.
  */
 template <typename Lyt, typename Dist = double>
-[[nodiscard]] Dist euclidean_distance([[maybe_unused]] const Lyt& lyt, const coordinate<Lyt>& source,
-                                      const coordinate<Lyt>& target) noexcept
+[[nodiscard]] constexpr Dist euclidean_distance([[maybe_unused]] const Lyt& lyt, const coordinate<Lyt>& source,
+                                                const coordinate<Lyt>& target) noexcept
 {
     static_assert(is_coordinate_layout_v<Lyt>, "Lyt is not a coordinate layout");
     static_assert(std::is_floating_point_v<Dist>, "Dist is not a floating-point type");