rust/tests/ui/issues/issue-21160.rs

struct Bar;

impl Bar {
    fn hash<T>(&self, _: T) {}
}

#[derive(Hash)]
struct Foo(Bar);
//~^ error: `Bar: Hash` is not satisfied

fn main() {}
use UFCS in `#[deriving(Hash)]` expansion now uses `::std::hash::Hash::hash(&__self_0_0, __arg_0)` instead of `(__self_0_0).hash(__arg_0)` closes #21160 2015-01-14 23:22:16 +00:00			`struct Bar;`

			`impl Bar {`
			`fn hash<T>(&self, _: T) {}`
			`}`

			`#[derive(Hash)]`
			`struct Foo(Bar);`
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 07:40:56 +00:00			//~^ error: `Bar: Hash` is not satisfied
use UFCS in `#[deriving(Hash)]` expansion now uses `::std::hash::Hash::hash(&__self_0_0, __arg_0)` instead of `(__self_0_0).hash(__arg_0)` closes #21160 2015-01-14 23:22:16 +00:00
			`fn main() {}`