rust/tests/ui/issues/issue-1460.stderr

warning: unused closure that must be used
  --> $DIR/issue-1460.rs:6:5
   |
LL |     {|i: u32| if 1 == i { }};
   |     ^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: closures are lazy and do nothing unless called
   = note: `#[warn(unused_must_use)]` on by default

warning: 1 warning emitted
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: \|\| {}; } ``` 2020-07-27 19:00:00 -05:00			`warning: unused closure that must be used`
			`--> $DIR/issue-1460.rs:6:5`
			`\|`
			`LL \| {\|i: u32\| if 1 == i { }};`
Tweak span for `#[must_use]` Do not point at whole statement, only at the expression (skip pointing at `;`) 2022-08-16 09:46:33 -05:00			`\| ^^^^^^^^^^^^^^^^^^^^^^^^`
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: \|\| {}; } ``` 2020-07-27 19:00:00 -05:00			`\|`
			`= note: closures are lazy and do nothing unless called`
bless ui tests 2022-09-18 10:55:36 -05:00			= 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: \|\| {}; } ``` 2020-07-27 19:00:00 -05:00
			`warning: 1 warning emitted`