rust/tests/ui/traits/alias/object-fail.rs

#![feature(trait_alias)]

trait EqAlias = Eq;
trait IteratorAlias = Iterator;

fn main() {
    let _: &dyn EqAlias = &123;
    //~^ ERROR the trait `Eq` cannot be made into an object [E0038]
    let _: &dyn IteratorAlias = &vec![123].into_iter();
    //~^ ERROR must be specified
}
Update tests. 2019-03-30 17:06:09 -05:00			`#![feature(trait_alias)]`

			`trait EqAlias = Eq;`
			`trait IteratorAlias = Iterator;`

			`fn main() {`
			`let _: &dyn EqAlias = &123;`
pretty: trim paths of unique symbols If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not. 2020-09-02 02:40:56 -05:00			//~^ ERROR the trait `Eq` cannot be made into an object [E0038]
Update tests. 2019-03-30 17:06:09 -05:00			`let _: &dyn IteratorAlias = &vec![123].into_iter();`
			`//~^ ERROR must be specified`
			`}`