rust/tests/ui/fn/suggest-return-future.rs

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2022-12-27 17:56:46 -06:00
//@ edition: 2021
async fn a() -> i32 {
0
}
fn foo() -> _ {
//~^ ERROR the placeholder `_` is not allowed within types on item signatures for return types [E0121]
//~| NOTE not allowed in type signatures
//~| HELP replace with an appropriate return type
//~| SUGGESTION impl Future<Output = i32>
a()
}
fn bar() -> _ {
//~^ ERROR the placeholder `_` is not allowed within types on item signatures for return types [E0121]
//~| NOTE not allowed in type signatures
//~| HELP replace with an appropriate return type
//~| SUGGESTION impl Future<Output = i32>
async { a().await }
}
fn main() {}