builders - done

smart-house/src/print_status.rs

@@ -1,3 +1,9 @@
 pub trait PrintStatus {
-    fn print_status(&self);
+    fn print_status_into(&self, out: &mut impl std::io::Write) -> Result<(), std::io::Error>;
+
+    fn print_status(&self) {
+        if let Err(e) = self.print_status_into(&mut std::io::stdout()) {
+            eprintln!("Unexpected print error: {:?}", e);
+        }
+    }
 }