9 Commits

Author	SHA1	Message	Date
Dan Aloni	07e7823c01	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 22:26:37 +03:00
Esteban Küber	34f03c01f6	Point at type in let assignment on type errors	2019-11-21 19:24:31 -08:00
Esteban Küber	6f8f70624b	Surround types with backticks in type errors	2019-11-18 11:03:04 -08:00
Esteban Küber	94c6425464	Remove E0308 note when primary label has all info	2019-11-18 11:03:03 -08:00
Esteban Küber	83ffda5216	Specific labels when referring to "expected" and "found" types	2019-11-18 11:02:22 -08:00
Dan Robertson	285d4a7eb6	suggestion-diagnostics: as_ref improve snippet ... Improve the code snippet suggested in suggestion-diagnostics when suggesting the use of as_ref.	2019-02-13 17:52:22 +00:00
Esteban Küber	8da6727e96	Suggest .as_ref() when appropriate for Option and Result	2018-12-28 11:16:23 -08:00
Oliver Schneider	53d2ebb0ad	Implement existential types	2018-07-18 10:53:08 +02:00
Esteban Küber	a19a03a31f	Suggest using as_ref on some borrow errors [hack] ... When encountering the following code: ```rust struct Foo; fn takes_ref(_: &Foo) {} let ref opt = Some(Foo); opt.map(|arg| takes_ref(arg)); ``` Suggest using `opt.as_ref().map(|arg| takes_ref(arg));` instead. This is a stop gap solution until we expand typeck to deal with these cases in a more graceful way.	2018-05-30 09:47:09 -07:00