wip: bubbling

packages/core/src/util.rs

@@ -1,4 +1,5 @@
 use std::cell::Cell;
+use std::fmt::Display;
 
 use crate::innerlude::*;
 
@@ -64,3 +65,28 @@ impl Future for YieldNow {
         }
     }
 }
+
+/// A component's unique identifier.
+///
+/// `ScopeId` is a `usize` that is unique across the entire VirtualDOM - but not unique across time. If a component is
+/// unmounted, then the `ScopeId` will be reused for a new component.
+#[derive(serde::Serialize, serde::Deserialize, Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub struct ScopeId(pub usize);
+
+/// An Element's unique identifier.
+///
+/// `ElementId` is a `usize` that is unique across the entire VirtualDOM - but not unique across time. If a component is
+/// unmounted, then the `ElementId` will be reused for a new component.
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub struct ElementId(pub usize);
+impl Display for ElementId {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl ElementId {
+    pub fn as_u64(self) -> u64 {
+        self.0 as u64
+    }
+}