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-{{#title Async functions — Rust ♡ C++}}
-# Async functions
-
-Direct FFI of async functions is absolutely in scope for CXX (on C++20 and up)
-but is not implemented yet in the current release. We are aiming for an
-implementation that is as easy as:
-
-```rust,noplayground
-#[cxx::bridge]
-mod ffi {
-    unsafe extern "C++" {
-        async fn doThing(arg: Arg) -> Ret;
-    }
-}
-```
-
-```cpp,hidelines
-rust::Future<Ret> doThing(Arg arg) {
-  auto v1 = co_await f();
-  auto v2 = co_await g(arg);
-  co_return v1 + v2;
-}
-```
-
-## Workaround
-
-For now the recommended approach is to handle the return codepath over a oneshot
-channel (such as [`futures::channel::oneshot`]) represented in an opaque Rust
-type on the FFI.
-
-[`futures::channel::oneshot`]: https://docs.rs/futures/0.3.8/futures/channel/oneshot/index.html
-
-```rust,noplayground
-// bridge.rs
-
-use futures::channel::oneshot;
-
-#[cxx::bridge]
-mod ffi {
-    extern "Rust" {
-        type DoThingContext;
-    }
-
-    unsafe extern "C++" {
-        include!("path/to/bridge_shim.h");
-
-        fn shim_doThing(
-            arg: Arg,
-            done: fn(Box<DoThingContext>, ret: Ret),
-            ctx: Box<DoThingContext>,
-        );
-    }
-}
-
-struct DoThingContext(oneshot::Sender<Ret>);
-
-pub async fn do_thing(arg: Arg) -> Ret {
-    let (tx, rx) = oneshot::channel();
-    let context = Box::new(DoThingContext(tx));
-
-    ffi::shim_doThing(
-        arg,
-        |context, ret| { let _ = context.0.send(ret); },
-        context,
-    );
-
-    rx.await.unwrap()
-}
-```
-
-```cpp
-// bridge_shim.cc
-
-#include "path/to/bridge.rs.h"
-#include "rust/cxx.h"
-
-void shim_doThing(
-    Arg arg,
-    rust::Fn<void(rust::Box<DoThingContext> ctx, Ret ret)> done,
-    rust::Box<DoThingContext> ctx) noexcept {
-  doThing(arg)
-      .then([done, ctx(std::move(ctx))](auto &&res) mutable {
-        (*done)(std::move(ctx), std::move(res));
-      });
-}
-```