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// edition:2018
#![feature(async_closure)]
use std::future::Future;
// test the quality of annotations giving lifetimes names (`'1`) when async constructs are involved
pub async fn async_fn(x: &mut i32) -> &i32 {
let y = &*x;
*x += 1; //~ ERROR cannot assign to `*x` because it is borrowed
y
}
pub fn async_closure(x: &mut i32) -> impl Future<Output=&i32> {
(async move || {
let y = &*x;
*x += 1; //~ ERROR cannot assign to `*x` because it is borrowed
y
})()
}
pub fn async_closure_explicit_return_type(x: &mut i32) -> impl Future<Output=&i32> {
(async move || -> &i32 {
let y = &*x;
*x += 1; //~ ERROR cannot assign to `*x` because it is borrowed
y
})()
}
pub fn async_block(x: &mut i32) -> impl Future<Output=&i32> {
async move {
let y = &*x;
*x += 1; //~ ERROR cannot assign to `*x` because it is borrowed
y
}
}
fn main() {}
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