wip: error boundary

packages/core/src/error_boundary.rs

@@ -0,0 +1,29 @@
+use std::{cell::RefCell, rc::Rc};
+
+use crate::{ScopeId, ScopeState};
+
+pub struct ErrorContext {
+    error: RefCell<Option<(anyhow::Error, ScopeId)>>,
+}
+
+/// Catch all errors from the children and bubble them up to this component
+///
+/// Returns the error and scope that caused the error
+pub fn use_catch_error(cx: &ScopeState) -> Option<&(anyhow::Error, ScopeId)> {
+    let err_ctx = use_error_context(cx);
+
+    let out = cx.use_hook(|| None);
+
+    if let Some(error) = err_ctx.error.take() {
+        *out = Some(error);
+    }
+
+    out.as_ref()
+}
+
+/// Create a new error context at this component.
+///
+/// This component will start to catch any errors that occur in its children.
+pub fn use_error_context(cx: &ScopeState) -> &ErrorContext {
+    cx.use_hook(|| cx.provide_context(Rc::new(ErrorContext { error: None.into() })))
+}