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# Objective This PR introduces an `AsyncSeekForwardExt` trait, which I forgot in my previous PR #14194. This new trait is analogous to `AsyncSeekExt` and allows all implementors of `AsyncSeekForward` to directly use the `seek_forward` function in async contexts. ## Solution - Implement a new `AsyncSeekForwardExt` trait - Automatically implement this trait for all types that implement `AsyncSeekForward` ## Showcase This new trait allows a similar API to the previous Bevy version: ```rust #[derive(Default)] struct UniverseLoader; #[derive(Asset, TypePath, Debug)] struct JustALilAsteroid([u8; 128]); impl AssetLoader for UniverseLoader { type Asset = JustALilAsteroid; type Settings = (); type Error = std::io::Error; async fn load<'a>( &'a self, reader: &'a mut Reader<'a>, _settings: &'a Self::Settings, _context: &'a mut LoadContext<'_>, ) -> Result<Self::Asset, Self::Error> { // read the asteroids entry table let entry_offset: u64 = /* ... */; let current_offset: u64 = reader.seek_forward(0).await?; // jump to the entry reader.seek_forward(entry_offset - current_offset).await?; let mut asteroid_buf = [0; 128]; reader.read_exact(&mut asteroid_buf).await?; Ok(JustALilAsteroid(asteroid_buf)) } fn extensions(&self) -> &[&str] { &["celestial"] } } ``` |
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Bevy Asset
