1 files changed, 52 insertions, 0 deletions
diff --git a/src/component.rs b/src/component.rs
new file mode 100644
index 0000000..1b36c3a
--- /dev/null
+++ b/src/component.rs
@@ -0,0 +1,52 @@
+use super::Entity;
+use super::sparse_set::SparseSet;
+
+pub trait Component {}
+
+#[macro_export]
+macro_rules! component {
+    ($name:ident) => {
+        #[derive(Clone, Copy, Debug)]
+        pub struct $name;
+        impl Component for $name {}
+    };
+
+    ($name:ident, $ty:ty) => {
+        #[derive(Clone, Copy, Debug)]
+        pub struct $name(pub $ty);
+
+        impl std::ops::Deref for $name {
+            type Target = $ty;
+            fn deref(&self) -> &Self::Target {
+                &self.0
+            }
+        }
+
+        impl std::ops::DerefMut for $name {
+            fn deref_mut(&mut self) -> &mut Self::Target {
+                &mut self.0
+            }
+        }
+
+        impl Component for $name {}
+    };
+
+    ($name:ident, { $($field:ident : $ty:ty),+ $(,)? }) => {
+        #[derive(Clone, Debug)]
+        pub struct $name {
+            $(pub $field: $ty),+
+        }
+
+        impl Component for $name {}
+    };
+}
+
+pub trait ComponentStorage<T: Component> {
+    fn storage(&self) -> &SparseSet<T>;
+    fn storage_mut(&mut self) -> &mut SparseSet<T>;
+    fn storage_ptr(&mut self) -> *mut SparseSet<T>;
+
+    fn insert(&mut self, entity: Entity, component: T) {
+        self.storage_mut().insert(entity, component);
+    }
+}