rust/tests/ui/inference/issue-72616.rs

33 lines
975 B
Rust

//@ ignore-wasm32 FIXME: ignoring wasm as it suggests slightly different impls
// Regression test for #72616, it used to emit incorrect diagnostics, like:
// error[E0283]: type annotations needed for `String`
// --> src/main.rs:8:30
// |
// 5 | let _: String = "".to_owned().try_into().unwrap();
// | - consider giving this pattern a type
// ...
// 8 | if String::from("a") == "a".try_into().unwrap() {}
// | ^^ cannot infer type for struct `String`
// |
// = note: cannot satisfy `String: PartialEq<_>`
use std::convert::TryInto;
pub fn main() {
{
let _: String = "".to_owned().try_into().unwrap();
}
{
if String::from("a") == "a".try_into().unwrap() {}
//~^ ERROR type annotations needed
//~| ERROR type annotations needed
}
{
let _: String = match "_".try_into() {
Ok(a) => a,
Err(_) => "".into(),
};
}
}