rust/tests/ui/coroutine/issue-57084.stderr

warning: unused coroutine that must be used
  --> $DIR/issue-57084.rs:22:18
   |
LL |       #[coroutine] || {
   |  __________________^
LL | |         let _to_pin = with(move || println!("{:p}", data));
LL | |         loop {
LL | |             yield
LL | |         }
LL | |     };
   | |_____^
   |
   = note: coroutines are lazy and do nothing unless resumed
   = note: `#[warn(unused_must_use)]` on by default

warning: 1 warning emitted
s/generator/coroutine/ 2023-10-19 21:46:28 +00:00			`warning: unused coroutine that must be used`
Error on using `yield` without also using `#[coroutine]` on the closure And suggest adding the `#[coroutine]` to the closure 2024-04-11 13:15:34 +00:00			`--> $DIR/issue-57084.rs:22:18`
Make closures and generators a must use types Warn about unused expressions with closure or generator type. This follows existing precedence of must use annotations present on `FnOnce`, `FnMut`, `Fn` traits, which already indirectly apply to closures in some cases, e.g.,: ```rust fn f() -> impl FnOnce() { \|\| {} } fn main() { // an existing warning: unused implementer of `std::ops::FnOnce` that must be used: f(); // a new warning: unused closure that must be used: \|\| {}; } ``` 2020-07-28 00:00:00 +00:00			`\|`
Error on using `yield` without also using `#[coroutine]` on the closure And suggest adding the `#[coroutine]` to the closure 2024-04-11 13:15:34 +00:00			`LL \| #[coroutine] \|\| {`
			`\| __________________^`
Make closures and generators a must use types Warn about unused expressions with closure or generator type. This follows existing precedence of must use annotations present on `FnOnce`, `FnMut`, `Fn` traits, which already indirectly apply to closures in some cases, e.g.,: ```rust fn f() -> impl FnOnce() { \|\| {} } fn main() { // an existing warning: unused implementer of `std::ops::FnOnce` that must be used: f(); // a new warning: unused closure that must be used: \|\| {}; } ``` 2020-07-28 00:00:00 +00:00			`LL \| \| let _to_pin = with(move \|\| println!("{:p}", data));`
			`LL \| \| loop {`
			`LL \| \| yield`
			`LL \| \| }`
			`LL \| \| };`
Tweak span for `#[must_use]` Do not point at whole statement, only at the expression (skip pointing at `;`) 2022-08-16 14:46:33 +00:00			`\| \|_____^`
Make closures and generators a must use types Warn about unused expressions with closure or generator type. This follows existing precedence of must use annotations present on `FnOnce`, `FnMut`, `Fn` traits, which already indirectly apply to closures in some cases, e.g.,: ```rust fn f() -> impl FnOnce() { \|\| {} } fn main() { // an existing warning: unused implementer of `std::ops::FnOnce` that must be used: f(); // a new warning: unused closure that must be used: \|\| {}; } ``` 2020-07-28 00:00:00 +00:00			`\|`
s/generator/coroutine/ 2023-10-19 21:46:28 +00:00			`= note: coroutines are lazy and do nothing unless resumed`
bless ui tests 2022-09-18 15:55:36 +00:00			= note: `#[warn(unused_must_use)]` on by default
Make closures and generators a must use types Warn about unused expressions with closure or generator type. This follows existing precedence of must use annotations present on `FnOnce`, `FnMut`, `Fn` traits, which already indirectly apply to closures in some cases, e.g.,: ```rust fn f() -> impl FnOnce() { \|\| {} } fn main() { // an existing warning: unused implementer of `std::ops::FnOnce` that must be used: f(); // a new warning: unused closure that must be used: \|\| {}; } ``` 2020-07-28 00:00:00 +00:00
			`warning: 1 warning emitted`