rust
/
async-book
mirror of https://github.com/rust-lang/async-book
1
0
Fork 0
Code Issues Releases Wiki Activity

07 workarounds/async in trait: update that nightly has mvp 

Signed-off-by: Harry van Haaren <harryhaaren@gmail.com>
This commit is contained in:
Harry van Haaren 2022-12-12 22:32:12 +00:00
parent 81c03c260f
commit 273aa2d423
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/07_workarounds/05_async_in_traits.md
View File

@ -1,10 +1,10 @@
# `async` in Traits # `async` in Traits
Currently, `async fn` cannot be used in traits. The reasons for this are Currently, `async fn` cannot be used in traits on the stable release of Rust.
somewhat complex, but there are plans to remove this restriction in the Since the 17th November 2022, an MVP of async-fn-in-trait is available on the nightly
future. version of the compiler tool chain, [see here for details](https://blog.rust-lang.org/inside-rust/2022/11/17/async-fn-in-trait-nightly.html).
In the meantime, however, this can be worked around using the In the meantime, there is a work around for the stable tool chain using the
[async-trait crate from crates.io](https://github.com/dtolnay/async-trait). [async-trait crate from crates.io](https://github.com/dtolnay/async-trait).
Note that using these trait methods will result in a heap allocation Note that using these trait methods will result in a heap allocation