--- a/rust/integral-geometry/src/lib.rs	Tue Nov 06 12:44:38 2018 -0500
+++ b/rust/integral-geometry/src/lib.rs	Tue Nov 06 23:29:12 2018 +0300
@@ -166,6 +166,7 @@
     }
 }
 
+#[derive(PartialEq, Eq, Clone, Copy, Debug)]
 pub struct SizeMask {
     size: Size,
 }