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fn main() {
let addr = Into::<std::net::IpAddr>.into([127, 0, 0, 1]);
//~^ ERROR expected value, found trait `Into`
//~| HELP use the path separator
let _ = Into.into(());
//~^ ERROR expected value, found trait `Into`
//~| HELP use the path separator
let _ = Into::<()>.into;
//~^ ERROR expected value, found trait `Into`
//~| HELP use the path separator
}
macro_rules! Trait {
() => {
::std::iter::Iterator
//~^ ERROR expected value, found trait `std::iter::Iterator`
//~| ERROR expected value, found trait `std::iter::Iterator`
};
}
macro_rules! create {
() => {
Into::<String>.into("")
//~^ ERROR expected value, found trait `Into`
//~| HELP use the path separator
};
}
fn interaction_with_macros() {
//
// Note that if the receiver is a macro call, we do not want to suggest to replace
// `.` with `::` as that would be a syntax error.
// Since the receiver is a trait and not a type, we cannot suggest to surround
// it with angle brackets. It would be interpreted as a trait object type void of
// `dyn` which is most likely not what the user intended to write.
// `<_ as Trait!()>::` is also not an option as it's equally syntactically invalid.
//
Trait!().map(std::convert::identity); // no `help` here!
Trait!().map; // no `help` here!
//
// Ensure that the suggestion is shown for expressions inside of macro definitions.
//
let _ = create!();
}
|
