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

Signed-off-by: Harry van Haaren <harryhaaren@gmail.com>
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Harry van Haaren 2022-12-12 22:32:12 +00:00
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src/07_workarounds/05_async_in_traits.md
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# `async` in Traits
Currently, `async fn` cannot be used in traits. The reasons for this are
somewhat complex, but there are plans to remove this restriction in the
future.
Currently, `async fn` cannot be used in traits on the stable release of Rust.
Since the 17th November 2022, an MVP of async-fn-in-trait is available on the nightly
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).
Note that using these trait methods will result in a heap allocation