mirror of
https://github.com/bevyengine/bevy
synced 2024-11-22 20:53:53 +00:00
e71c4d2802
# Objective
- fix new clippy lints before they get stable and break CI
## Solution
- run `clippy --fix` to auto-fix machine-applicable lints
- silence `clippy::should_implement_trait` for `fn HandleId::default<T: Asset>`
## Changes
- always prefer `format!("{inline}")` over `format!("{}", not_inline)`
- prefer `Box::default` (or `Box::<T>::default` if necessary) over `Box::new(T::default())`
30 lines
1,016 B
Rust
30 lines
1,016 B
Rust
//! Illustrates how to make a single system from multiple functions running in sequence,
|
|
//! passing the output of the first into the input of the next.
|
|
|
|
use anyhow::Result;
|
|
use bevy::prelude::*;
|
|
|
|
fn main() {
|
|
App::new()
|
|
.insert_resource(Message("42".to_string()))
|
|
.add_system(parse_message_system.pipe(handler_system))
|
|
.run();
|
|
}
|
|
|
|
#[derive(Resource, Deref)]
|
|
struct Message(String);
|
|
|
|
// this system produces a Result<usize> output by trying to parse the Message resource
|
|
fn parse_message_system(message: Res<Message>) -> Result<usize> {
|
|
Ok(message.parse::<usize>()?)
|
|
}
|
|
|
|
// This system takes a Result<usize> input and either prints the parsed value or the error message
|
|
// Try changing the Message resource to something that isn't an integer. You should see the error
|
|
// message printed.
|
|
fn handler_system(In(result): In<Result<usize>>) {
|
|
match result {
|
|
Ok(value) => println!("parsed message: {value}"),
|
|
Err(err) => println!("encountered an error: {err:?}"),
|
|
}
|
|
}
|