errors fixed, renders nothing :(

crates/tek_core/src/engine/collect.rs

@@ -13,12 +13,11 @@ impl<'a, E: Engine> Render<E> for Collected<'a, E> {
         }
     }
 }
-
-impl<'a, E: Engine> Layout<E> for &Collected<'a, E> {
+impl<'a, E: Engine> Layout<E> for Collected<'a, E> {
     fn layout (&self, area: E::Area) -> Perhaps<E::Area> {
-        match *self {
-            Collected::Box(inner) => (*inner).layout(area),
-            Collected::Ref(inner) => (*inner).layout(area),
+        match self {
+            Self::Box(inner) => (*inner).layout(area),
+            Self::Ref(inner) => (*inner).layout(area),
         }
     }
 }

crates/tek_core/src/engine/layout.rs

@@ -14,6 +14,21 @@ pub fn center_box (area: Rect, w: u16, h: u16) -> Rect {
 pub trait Layout<E: Engine>: Render<E> {
     fn layout (&self, area: E::Area) -> Perhaps<E::Area>;
 }
+
+impl<E: Engine, T: Layout<E>> Layout<E> for &T {
+    fn layout (&self, area: E::Area) -> Perhaps<E::Area> {
+        (*self).layout(area)
+    }
+}
+impl<E: Engine, T: Layout<E>> Layout<E> for Option<T> {
+    fn layout (&self, area: E::Area) -> Perhaps<E::Area> {
+        match self {
+            Some(layout) => layout.layout(area),
+            None => Ok(None)
+        }
+    }
+}
+
 /// Enforce minimum size of drawing area
 pub enum Min<U: Number, L> { W(U, L), H(U, L), WH(U, U, L), }
 /// Enforce maximum size of drawing area

crates/tek_core/src/engine/render.rs

@@ -5,6 +5,12 @@ pub trait Render<E: Engine>: Send + Sync {
     fn render (&self, to: &mut E) -> Perhaps<E::Rendered>;
 }
 
+impl<E: Engine> Render<E> for () {
+    fn render (&self, to: &mut E) -> Perhaps<E::Rendered> {
+        Ok(None)
+    }
+}
+
 /// Options can be rendered optionally.
 impl<R, E: Engine> Render<E> for Option<R> where R: Render<E> {
     fn render (&self, to: &mut E) -> Perhaps<E::Rendered> {