1 files changed, 8 insertions, 37 deletions
diff --git a/engine/src/lib.rs b/engine/src/lib.rs
index b1c41d6..01c0701 100644
--- a/engine/src/lib.rs
+++ b/engine/src/lib.rs
@@ -3,15 +3,12 @@
 
 use crate::asset::{Assets, Extension as AssetExtension};
 use crate::delta_time::{update as update_delta_time, DeltaTime, LastUpdate};
-use crate::ecs::component::Sequence as ComponentSequence;
+use crate::ecs::error::HandlerFn as ErrorHandlerFn;
 use crate::ecs::extension::Extension;
 use crate::ecs::phase::PRE_UPDATE as PRE_UPDATE_PHASE;
-use crate::ecs::sole::Sole;
 use crate::ecs::system::initializable::Initializable;
-use crate::ecs::system::observer::Observer;
-use crate::ecs::system::{Into, System};
-use crate::ecs::uid::Uid;
-use crate::ecs::{SoleAlreadyExistsError, World};
+use crate::ecs::system::Into;
+use crate::ecs::World;
 use crate::shader::Extension as ShaderExtension;
 
 mod util;
@@ -87,42 +84,16 @@ impl Engine
         Self { world }
     }
 
-    pub fn spawn<Comps>(&mut self, components: Comps) -> Uid
-    where
-        Comps: ComponentSequence,
+    pub fn with_error_handler(mut self, error_handler: ErrorHandlerFn) -> Self
     {
-        self.world.create_entity(components)
+        self.world.set_err_handler(error_handler);
+        self
     }
 
-    pub fn register_system<'this, SystemImpl>(
-        &'this mut self,
-        phase_euid: Uid,
-        system: impl System<'this, SystemImpl>,
-    )
-    {
-        self.world.register_system(phase_euid, system);
-    }
-
-    pub fn register_observer<'this, SystemImpl>(
-        &'this mut self,
-        observer: impl Observer<'this, SystemImpl>,
-    )
-    {
-        self.world.register_observer(observer);
-    }
-
-    /// Adds a globally shared singleton value.
-    ///
-    /// # Errors
-    /// Returns `Err` if this [`Sole`] has already been added.
-    pub fn add_sole(&mut self, sole: impl Sole) -> Result<(), SoleAlreadyExistsError>
-    {
-        self.world.add_sole(sole)
-    }
-
-    pub fn add_extension(&mut self, extension: impl Extension)
+    pub fn with_extension(mut self, extension: impl Extension) -> Self
     {
         self.world.add_extension(extension);
+        self
     }
 
     /// Runs the event loop.