rust/tests/ui/suggestions/copied-and-cloned.rs

58 lines
1.7 KiB
Rust

// run-rustfix
fn expect<T>(_: T) {}
struct Issue114925 {
x: Option<String>,
}
fn issue_114925(lol: &mut Issue114925, x: Option<&String>) {
lol.x = x.clone();
//~^ ERROR mismatched types
//~| HELP use `Option::cloned` to clone the value inside the `Option`
}
fn main() {
let x = Some(&());
expect::<Option<()>>(x);
//~^ ERROR mismatched types
//~| HELP use `Option::copied` to copy the value inside the `Option`
let x = Ok(&());
expect::<Result<(), ()>>(x);
//~^ ERROR mismatched types
//~| HELP use `Result::copied` to copy the value inside the `Result`
let s = String::new();
let x = Some(&s);
expect::<Option<String>>(x);
//~^ ERROR mismatched types
//~| HELP use `Option::cloned` to clone the value inside the `Option`
let x = Ok(&s);
expect::<Result<String, ()>>(x);
//~^ ERROR mismatched types
//~| HELP use `Result::cloned` to clone the value inside the `Result`
let s = String::new();
let x = Some(s.clone());
let y = Some(&s);
println!("{}", x == y);
//~^ ERROR mismatched types
//~| HELP use `Option::cloned` to clone the value inside the `Option`
//FIXME(#114050) ~| HELP use `Option::as_ref` to convert `Option<String>` to `Option<&String>`
let mut s = ();
let x = Some(s);
let y = Some(&mut s);
println!("{}", x == y);
//~^ ERROR mismatched types
//~| HELP use `Option::copied` to copy the value inside the `Option`
let mut s = String::new();
let x = Some(s.clone());
let y = Some(&mut s);
println!("{}", x == y);
//~^ ERROR mismatched types
//~| HELP use `Option::cloned` to clone the value inside the `Option`
issue_114925(&mut Issue114925 { x: None }, None);
}