rust/tests/ui/coroutine/yield-in-initializer.stderr

warning: unused coroutine that must be used
  --> $DIR/yield-in-initializer.rs:6:18
   |
LL |       #[coroutine] static || {
   |  __________________^
LL | |         loop {
...  |
LL | |     };
   | |_____^
   |
   = note: coroutines are lazy and do nothing unless resumed
   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) 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/yield-in-initializer.rs:6:18`
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] static \|\| {`
			`\| __________________^`
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 \| \| loop {`
			`... \|`
			`LL \| \| };`
Tweak span for `#[must_use]` Do not point at whole statement, only at the expression (skip pointing at `;`) 2022-08-16 07:46:33 -07:00			`\| \|_____^`
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 tests with new lint messages 2025-04-28 13:47:25 +02:00			= note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) 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`