Struct ErrorBoundary 

pub struct ErrorBoundary { /* private fields */ }

A handle that tracks whether a wrapped subtree has thrown.

The boundary’s phase is exposed via phase() as a Signal<ErrorBoundaryPhase>. The parent component reads that signal to decide whether to render the child or a fallback.

try_with(closure) runs the closure and, if it panics, transitions the boundary to Caught. The closure’s return value (if it didn’t panic) is returned to the caller; if it panicked, an Err is returned containing the panic message.

Implementations

impl ErrorBoundary

Inherent implementation of ErrorBoundary.

pub fn new() -> Self

Creates a new ErrorBoundary in the Healthy phase.

pub fn try_with<F, R>(&self, closure: F) -> Result<R, String>

where F: FnOnce() -> R + UnwindSafe,

Runs a closure and, if it panics, transitions the boundary to Caught and returns Err.

On success, the closure’s return value is returned wrapped in Ok. The closure is wrapped in AssertUnwindSafe so it does not have to satisfy UnwindSafe.

Arguments

• F: FnOnce() -> R + UnwindSafe - A generic type parameter.

Returns

• Result<R, String> - Result of the operation; an Err variant on failure.

pub fn report_error(&self, message: &str) -> String

Feeds an Err straight into the boundary without forcing the caller to panic!.

try_with requires a real panic to transition the phase to Caught, which makes demonstrating the hook from outside tests/ awkward. This helper lets demo / driver code report a failure message via the regular Result channel and still flip the boundary into Caught.

Arguments

• &str - The error message to surface.

Returns

• String - The same message that was passed in.

pub fn reset(&self)

Transitions the boundary back to Healthy. Useful when invalidating the cache (e.g., after a retry).

impl ErrorBoundary

pub fn get_phase(&self) -> &Signal<ErrorBoundaryPhase>

pub fn get_mut_phase(&mut self) -> &mut Signal<ErrorBoundaryPhase>

pub fn set_phase(&mut self, val: Signal<ErrorBoundaryPhase>) -> &mut Self

Trait Implementations

impl Clone for ErrorBoundary

fn clone(&self) -> ErrorBoundary

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ErrorBoundary

ErrorBoundary is Copy because Signal<ErrorBoundaryPhase> is itself Copy — the signal registry hands out cheap usize addresses.

impl Debug for ErrorBoundary

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ErrorBoundary

Default-construction for ErrorBoundary.

fn default() -> Self

Constructs a default ErrorBoundary value.

impl Display for ErrorBoundary

Formatting / debug-printing for ErrorBoundary.

fn fmt(&self, formatter: &mut Formatter<'_>) -> FmtResult

Formats the ErrorBoundary via the supplied formatter.

Arguments

• &mut Formatter<'_> - The formatter receiving the formatted output.

Returns

• FmtResult - Result of the formatting operation.