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rust/tests/ui/coroutine/match-bindings.stderr

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s/generator/coroutine/
2023-10-20 05:46:28 +08:00
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 21:15:34 +08:00
--> $DIR/match-bindings.rs:12:18
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 08:00:00 +08:00
|
Error on using `yield` without also using `#[coroutine]` on the closure And suggest adding the `#[coroutine]` to the closure
2024-04-11 21:15:34 +08:00
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 08:00:00 +08:00
LL | | loop {
LL | | if let true = true {
LL | | match Enum::A(String::new()) {
... |
LL | | }
LL | | };
Tweak span for `#[must_use]` Do not point at whole statement, only at the expression (skip pointing at `;`)
2022-08-16 22:46:33 +08:00
| |_____^
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 08:00:00 +08:00
|
s/generator/coroutine/
2023-10-20 05:46:28 +08:00
= note: coroutines are lazy and do nothing unless resumed
bless ui tests
2022-09-18 23:55:36 +08:00
= 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 08:00:00 +08:00
warning: 1 warning emitted