1 unstable release
0.4.0 | Dec 21, 2020 |
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#652 in #game-engine
5KB
bevy_fallible
A simple plugin to install fallible systems to bevy
API
Library provides two main components: #[fallible_system]
attribute macro and SystemErrorEvent
struct.
Essentially, every fallible_system will generate a SystemErrorEvent
event if it results in an error, and that's about it.
For simplier usage, there is fallibleSystemPlugin
to register everything you'll need to recieve error events.
Example
// Some system that might fail
#[fallible_system]
fn system(asset_server: Res<AssetServer>) -> anyhow::Result<()> {
let handle: Handle<Texture> = asset_server.load("texture")?;
}
// Let's make another system to read every event about other
// systems failures and report !
#[derive(Default)]
struct ReportSystemState{ reader: EventReader<SystemErrorEvent> }
fn report_system(mut state: Local<ReportSystemState>, mut events: ResMut<Events<SystemErrorEvent>>) {
for event in state.reader.iter(&mut events) {
println!("Error in {}: {}", event.system_name, event.error);
}
}
fn main() {
App::build()
.add_plugin(fallibleSystemPlugin)
.add_startup_system(system.system())
.add_system(report_system.system())
.run();
}
Dependencies
~6–8.5MB
~152K SLoC