17

lib/include/aocpp/Grid.hpp

@@ -13,6 +13,14 @@ namespace aocpp {
 struct Grid {
   std::vector<std::string> rows;
 
+  auto contains(Coord c) const -> bool {
+    return 
+         0 <= c.x
+      && 0 <= c.y
+      && c.y < rows.size()
+      && c.x < rows[c.y].size();
+  }
+
   auto operator[](Coord c)       -> char& { return rows[c.y][c.x]; }
   auto operator[](Coord c) const -> char  { return rows[c.y][c.x]; }
 
@@ -40,4 +48,4 @@ struct Grid {
 
 }
 
-#endif
+#endif