rust/tests/ui/rfc-2361-dbg-macro/dbg-macro-requires-debug.rs

// Test ensuring that `dbg!(expr)` requires the passed type to implement `Debug`.

struct NotDebug;

fn main() {
    let _: NotDebug = dbg!(NotDebug); //~ ERROR `NotDebug` doesn't implement `Debug`
}
dbg_macro: Debug-required test. 2018-09-18 02:28:17 +00:00			// Test ensuring that `dbg!(expr)` requires the passed type to implement `Debug`.

			`struct NotDebug;`

			`fn main() {`
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			let _: NotDebug = dbg!(NotDebug); //~ ERROR `NotDebug` doesn't implement `Debug`
dbg_macro: Debug-required test. 2018-09-18 02:28:17 +00:00			`}`