diff options
Diffstat (limited to 'third_party/rust/async-trait/tests/ui/arg-implementation-detail.rs')
| -rw-r--r-- | third_party/rust/async-trait/tests/ui/arg-implementation-detail.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/third_party/rust/async-trait/tests/ui/arg-implementation-detail.rs b/third_party/rust/async-trait/tests/ui/arg-implementation-detail.rs new file mode 100644 index 0000000000..b83aa72fcf --- /dev/null +++ b/third_party/rust/async-trait/tests/ui/arg-implementation-detail.rs @@ -0,0 +1,22 @@ +use async_trait::async_trait; + +pub struct Struct; + +#[async_trait] +pub trait Trait { + async fn f((_a, _b): (Struct, Struct)) { + // Expands to something like: + // + // fn f(__arg0: (Struct, Struct)) -> … { + // Box::pin(async move { + // let (_a, _b) = __arg0; + // … + // }) + // } + // + // but user's code must not be allowed to name that temporary argument: + let _ = __arg0; + } +} + +fn main() {} |