rust/tests/ui/str/str-concat-on-double-ref.stderr

error[E0369]: cannot add `&str` to `&String`
  --> $DIR/str-concat-on-double-ref.rs:4:15
   |
LL |     let c = a + b;
   |             - ^ - &str
   |             | |
   |             | `+` cannot be used to concatenate two `&str` strings
   |             &String
   |
   = note: string concatenation requires an owned `String` on the left
help: create an owned `String` from a string reference
   |
LL |     let c = a.to_owned() + b;
   |              +++++++++++

error: aborting due to previous error

For more information about this error, try `rustc --explain E0369`.
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[E0369]: cannot add `&str` to `&String`
Better diagnostic for binary operation on BoxedValues 2019-03-27 17:13:09 +00:00			`--> $DIR/str-concat-on-double-ref.rs:4:15`
Move compile-fail tests with NOTE/HELP annotations to UI 2017-12-10 19:47:55 +00:00			`\|`
Update UI tests 2018-02-23 00:42:32 +00:00			`LL \| let c = a + b;`
Make suggestions verbose 2022-01-19 00:38:06 +00:00			`\| - ^ - &str`
			`\| \| \|`
			\| \| `+` cannot be used to concatenate two `&str` strings
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			`\| &String`
Increase spacing for suggestions in diagnostics Make the spacing between the code snippet and verbose structured suggestions consistent with note and help messages. 2019-10-24 05:20:58 +00:00			`\|`
Shorten and improve messages 2022-01-19 00:32:58 +00:00			= note: string concatenation requires an owned `String` on the left
Make suggestions verbose 2022-01-19 00:38:06 +00:00			help: create an owned `String` from a string reference
			`\|`
			`LL \| let c = a.to_owned() + b;`
			`\| +++++++++++`
Move compile-fail tests with NOTE/HELP annotations to UI 2017-12-10 19:47:55 +00:00
			`error: aborting due to previous error`

update tests 2018-03-03 14:59:40 +00:00			For more information about this error, try `rustc --explain E0369`.