rust/tests/ui/nll/capture-mut-ref.rs

//@ run-rustfix

// Check that capturing a mutable reference by move and assigning to its
// referent doesn't make the unused mut lint think that it is mutable.

#![deny(unused_mut)]

pub fn mutable_upvar() {
    let mut x = &mut 0;
    //~^ ERROR
    let _ = move || {
        *x = 1;
    };
}

fn main() {}
Audit uses of `span_suggestion_short` 2020-07-02 05:32:12 +00:00			`//@ run-rustfix`

Fix various nll unused mut errors 2018-07-03 19:12:09 +00:00			`// Check that capturing a mutable reference by move and assigning to its`
			`// referent doesn't make the unused mut lint think that it is mutable.`

			`#![deny(unused_mut)]`

Audit uses of `span_suggestion_short` 2020-07-02 05:32:12 +00:00			`pub fn mutable_upvar() {`
Fix various nll unused mut errors 2018-07-03 19:12:09 +00:00			`let mut x = &mut 0;`
			`//~^ ERROR`
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			`let _ = move \|\| {`
Fix various nll unused mut errors 2018-07-03 19:12:09 +00:00			`*x = 1;`
			`};`
			`}`

			`fn main() {}`