From 827bfe4154a9679a173755bb2098b863ef890f70 Mon Sep 17 00:00:00 2001 From: Oli Scherer Date: Fri, 2 Feb 2024 09:25:16 +0000 Subject: Document `async_fn_traits` --- .../unstable-book/src/library-features/async-fn-traits.md | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 src/doc/unstable-book/src/library-features/async-fn-traits.md (limited to 'src') diff --git a/src/doc/unstable-book/src/library-features/async-fn-traits.md b/src/doc/unstable-book/src/library-features/async-fn-traits.md new file mode 100644 index 00000000000..e1c3f067e5b --- /dev/null +++ b/src/doc/unstable-book/src/library-features/async-fn-traits.md @@ -0,0 +1,13 @@ +# `async_fn_traits` + +See Also: [`fn_traits`](../library-features/fn-traits.md) + +---- + +The `async_fn_traits` feature allows for implementation of the [`AsyncFn*`] traits +for creating custom closure-like types that return futures. + +[`AsyncFn*`]: ../../std/ops/trait.AsyncFn.html + +The main difference to the `Fn*` family of traits is that `AsyncFn` can return a future +that borrows from itself (`FnOnce::Output` has no lifetime parameters, while `AsyncFn::CallFuture` does). -- cgit 1.4.1-3-g733a5