Add CellSet::share_any_house()

Author: dharkness

src/layout/cells/cell_set.rs

@@ -279,6 +279,11 @@ impl CellSet {
         *self = self.inverted()
     }
 
+    /// Returns true if all cells in this set are all in any single house.
+    pub fn share_any_house(&self) -> bool {
+        self.share_row() || self.share_column() || self.share_block()
+    }
+
     /// Returns true if all cells in this set are in the same row.
     pub fn share_row(&self) -> bool {
         self.share_house(Shape::Row)

src/solve/algorithms/wxyz_wings.rs

@@ -115,7 +115,7 @@ pub fn find_wxyz_wings(board: &Board, single: bool) -> Option<Effects> {
             return false;
         }
         // ignore naked quads
-        if wing.share_row() || wing.share_column() || wing.share_block() {
+        if wing.share_any_house() {
             return false;
         }
         // ignore naked pairs