rust/tests/ui/resolve/disambiguate-identical-names.rs

pub mod submod {
    // Create ambiguity with the std::vec::Vec item:
    pub struct Vec;
}

fn test(_v: &Vec<Vec<u32>>) {
}

fn main() {
    let v = std::collections::HashMap::new();
    v.insert(3u8, 1u8);

    test(&v);
    //~^ ERROR mismatched types
}
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			`pub mod submod {`
			`// Create ambiguity with the std::vec::Vec item:`
			`pub struct Vec;`
			`}`

			`fn test(_v: &Vec<Vec<u32>>) {`
			`}`

			`fn main() {`
			`let v = std::collections::HashMap::new();`
			`v.insert(3u8, 1u8);`

			`test(&v);`
			`//~^ ERROR mismatched types`
			`}`