Enum WindowedLaunchError 

#[non_exhaustive]
pub enum WindowedLaunchError<E> {
    Build(E),
    EventLoop(EventLoopError),
}

Available on crate feature winit only.

The error Windowed’s Launch impl can fail with.

Spans the two independent ways launching a windowed backend can fail: the presenter builder’s own PresenterBuilder::Error (a bad grid/font/tileset configuration), and EventLoopError (winit’s event loop failing to start or to run). Kept as a small enum naming both rather than degraded to a String: a caller matching on it can still tell which half failed, and ? off of either PresenterBuilder::build_presenter or run_app_on converts automatically.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Build(E)

PresenterBuilder::build_presenter failed to build the presenter.

EventLoop(EventLoopError)

The winit event loop failed to start or failed while running.

Trait Implementations

impl<E: Debug> Debug for WindowedLaunchError<E>

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

Formats the value using the given formatter.

impl<E: Display> Display for WindowedLaunchError<E>

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

Formats the value using the given formatter.

impl<E: Error + 'static> Error for WindowedLaunchError<E>

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.