wip: 21 errors!

crates/tek_core/src/engine.rs

@@ -6,12 +6,25 @@ pub trait App<T: Engine> {
 }
 
 /// Platform backend.
-pub trait Engine {
-    type Handled;
-    type Rendered;
-    fn setup    (&mut self) -> Usually<()> { Ok(()) }
+pub trait Engine: Sized {
+    fn setup (&mut self) -> Usually<()> { Ok(()) }
+    fn exited (&self) -> bool;
     fn teardown (&mut self) -> Usually<()> { Ok(()) }
-    fn handle   (&self, _: &mut impl Handle<Self>) -> Usually<()> where Self: Sized;
-    fn render   (&mut self, _: &impl Render<Self>) -> Usually<()> where Self: Sized;
-    fn exited   (&self) -> bool;
+
+    type HandleInput;
+    fn handle (&self, _: &mut impl Handle<Self>) -> Usually<()> where Self: Sized;
+    type Handled;
+
+    type RenderInput;
+    fn render (&mut self, _: &impl Render<Self>) -> Usually<()> where Self: Sized;
+    type Rendered;
+}
+
+pub trait HandleContext {}
+
+pub trait RenderContext {}
+
+submod! {
+    render
+    handle
 }