mirror of
https://github.com/bevyengine/bevy
synced 2024-12-24 03:53:06 +00:00
d70595b667
# Objective - Fixes #6370 - Closes #6581 ## Solution - Added the following lints to the workspace: - `std_instead_of_core` - `std_instead_of_alloc` - `alloc_instead_of_core` - Used `cargo +nightly fmt` with [item level use formatting](https://rust-lang.github.io/rustfmt/?version=v1.6.0&search=#Item%5C%3A) to split all `use` statements into single items. - Used `cargo clippy --workspace --all-targets --all-features --fix --allow-dirty` to _attempt_ to resolve the new linting issues, and intervened where the lint was unable to resolve the issue automatically (usually due to needing an `extern crate alloc;` statement in a crate root). - Manually removed certain uses of `std` where negative feature gating prevented `--all-features` from finding the offending uses. - Used `cargo +nightly fmt` with [crate level use formatting](https://rust-lang.github.io/rustfmt/?version=v1.6.0&search=#Crate%5C%3A) to re-merge all `use` statements matching Bevy's previous styling. - Manually fixed cases where the `fmt` tool could not re-merge `use` statements due to conditional compilation attributes. ## Testing - Ran CI locally ## Migration Guide The MSRV is now 1.81. Please update to this version or higher. ## Notes - This is a _massive_ change to try and push through, which is why I've outlined the semi-automatic steps I used to create this PR, in case this fails and someone else tries again in the future. - Making this change has no impact on user code, but does mean Bevy contributors will be warned to use `core` and `alloc` instead of `std` where possible. - This lint is a critical first step towards investigating `no_std` options for Bevy. --------- Co-authored-by: François Mockers <francois.mockers@vleue.com>
44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
//! In this example we add a counter resource and increase its value in one system,
|
|
//! while a different system prints the current count to the console.
|
|
|
|
#![expect(clippy::std_instead_of_core)]
|
|
|
|
use bevy_ecs::prelude::*;
|
|
use rand::Rng;
|
|
use std::ops::Deref;
|
|
|
|
fn main() {
|
|
// Create a world
|
|
let mut world = World::new();
|
|
|
|
// Add the counter resource
|
|
world.insert_resource(Counter { value: 0 });
|
|
|
|
// Create a schedule
|
|
let mut schedule = Schedule::default();
|
|
|
|
// Add systems to increase the counter and to print out the current value
|
|
schedule.add_systems((increase_counter, print_counter).chain());
|
|
|
|
for iteration in 1..=10 {
|
|
println!("Simulating frame {iteration}/10");
|
|
schedule.run(&mut world);
|
|
}
|
|
}
|
|
|
|
// Counter resource to be increased and read by systems
|
|
#[derive(Debug, Resource)]
|
|
struct Counter {
|
|
pub value: i32,
|
|
}
|
|
|
|
fn increase_counter(mut counter: ResMut<Counter>) {
|
|
if rand::thread_rng().gen_bool(0.5) {
|
|
counter.value += 1;
|
|
println!(" Increased counter value");
|
|
}
|
|
}
|
|
|
|
fn print_counter(counter: Res<Counter>) {
|
|
println!(" {:?}", counter.deref());
|
|
}
|