4 files changed, 23 insertions, 6 deletions
diff --git a/src/tile-image.cpp b/src/tile-image.cpp
new file mode 100644
index 00000000..4210db94
--- /dev/null
+++ b/src/tile-image.cpp
@@ -0,0 +1,11 @@
+#include "tile-image.hpp"
+
+namespace floormat {
+
+bool operator==(const tile_image& a, const tile_image& b) noexcept
+{
+    return a.atlas == b.atlas && a.variant == b.variant;
+}
+
+} // namespace floormat
+
diff --git a/src/tile-image.hpp b/src/tile-image.hpp
index 06d0cb41..6c90a2d5 100644
--- a/src/tile-image.hpp
+++ b/src/tile-image.hpp
@@ -13,12 +13,8 @@ struct tile_image final
     std::uint16_t variant = (std::uint16_t)-1;
 
     explicit operator bool() const noexcept { return !!atlas; }
-
-    std::strong_ordering operator<=>(const tile_image& o) const noexcept
-    {
-        const auto ret = atlas.get() <=> o.atlas.get();
-        return ret != std::strong_ordering::equal ? ret : variant <=> o.variant;
-    }
 };
 
+bool operator==(const tile_image& a, const tile_image& b) noexcept;
+
 } // namespace floormat
diff --git a/src/tile.cpp b/src/tile.cpp
index 82970c76..7e988a27 100644
--- a/src/tile.cpp
+++ b/src/tile.cpp
@@ -2,4 +2,12 @@
 
 namespace floormat {
 
+bool operator==(const tile& a, const tile& b) noexcept
+{
+    return a.ground      == b.ground &&
+           a.wall_north  == b.wall_north &&
+           a.wall_west   == b.wall_west &&
+           a.passability == b.passability;
+}
+
 } // namespace floormat
diff --git a/src/tile.hpp b/src/tile.hpp
index 1997f747..52d06b9d 100644
--- a/src/tile.hpp
+++ b/src/tile.hpp
@@ -17,4 +17,6 @@ struct tile final
     fm_DECLARE_DEFAULT_MOVE_ASSIGNMENT_(tile);
 };
 
+bool operator==(const tile& a, const tile& b) noexcept;
+
 } //namespace floormat