rust/tests/ui/wf/wf-in-fn-ret.stderr

error[E0277]: the trait bound `T: Copy` is not satisfied
  --> $DIR/wf-in-fn-ret.rs:10:16
   |
LL | fn bar<T>() -> MustBeCopy<T>
   |                ^^^^^^^^^^^^^ the trait `Copy` is not implemented for `T`
   |
note: required by a bound in `MustBeCopy`
  --> $DIR/wf-in-fn-ret.rs:6:22
   |
LL | struct MustBeCopy<T: Copy> {
   |                      ^^^^ required by this bound in `MustBeCopy`
help: consider restricting type parameter `T` with trait `Copy`
   |
LL | fn bar<T: std::marker::Copy>() -> MustBeCopy<T>
   |         +++++++++++++++++++

error[E0308]: mismatched types
  --> $DIR/wf-in-fn-ret.rs:10:16
   |
LL | fn bar<T>() -> MustBeCopy<T>
   |    ---         ^^^^^^^^^^^^^ expected `MustBeCopy<T>`, found `()`
   |    |
   |    implicitly returns `()` as its body has no tail or `return` expression
   |
   = note: expected struct `MustBeCopy<T>`
           found unit type `()`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0277, E0308.
For more information about an error, try `rustc --explain E0277`.
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 10:40:56 +03:00			error[E0277]: the trait bound `T: Copy` is not satisfied
Point at arguments or output when fn obligations come from them, or ident when they don't 2020-01-18 14:57:56 -08:00			`--> $DIR/wf-in-fn-ret.rs:10:16`
Moved compile-fail tests to ui tests. 2018-08-08 14:28:26 +02:00			`\|`
Point at arguments or output when fn obligations come from them, or ident when they don't 2020-01-18 14:57:56 -08:00			`LL \| fn bar<T>() -> MustBeCopy<T>`
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 10:40:56 +03:00			\| ^^^^^^^^^^^^^ the trait `Copy` is not implemented for `T`
Improve reporting errors and suggestions for trait bounds 2019-12-26 13:43:33 +01:00			`\|`
Use note to point at bound introducing requirement 2021-07-31 09:26:55 -07:00			note: required by a bound in `MustBeCopy`
Continue compilation after check_mod_type_wf errors 2024-02-09 12:17:55 +00:00			`--> $DIR/wf-in-fn-ret.rs:6:22`
Use note to point at bound introducing requirement 2021-07-31 09:26:55 -07:00			`\|`
Continue compilation after check_mod_type_wf errors 2024-02-09 12:17:55 +00:00			`LL \| struct MustBeCopy<T: Copy> {`
			\| ^^^^ required by this bound in `MustBeCopy`
Use trait name instead of full constraint in suggestion message ``` help: consider restricting type parameter `T` with traits `Copy` and `Trait` \| LL \| fn duplicate_custom<T: Copy + Trait>(t: S<T>) -> (S<T>, S<T>) { \| ++++++++++++++ ``` ``` help: consider restricting type parameter `V` with trait `Copy` \| LL \| fn index<'a, K, V: std::marker::Copy>(map: &'a HashMap<K, V>, k: K) -> &'a V { \| +++++++++++++++++++ ``` 2024-11-28 20:22:46 +00:00			help: consider restricting type parameter `T` with trait `Copy`
Improve reporting errors and suggestions for trait bounds 2019-12-26 13:43:33 +01:00			`\|`
give full path of constraint in suggest_constraining_type_param revert file bless with nll mode 2021-03-30 17:56:39 +08:00			`LL \| fn bar<T: std::marker::Copy>() -> MustBeCopy<T>`
Modify structured suggestion output * On suggestions that include deletions, use a diff inspired output format * When suggesting addition, use `+` as underline * Color highlight modified span 2021-06-21 19:07:19 -07:00			`\| +++++++++++++++++++`
Moved compile-fail tests to ui tests. 2018-08-08 14:28:26 +02:00
Continue compilation after check_mod_type_wf errors 2024-02-09 12:17:55 +00:00			`error[E0308]: mismatched types`
			`--> $DIR/wf-in-fn-ret.rs:10:16`
			`\|`
			`LL \| fn bar<T>() -> MustBeCopy<T>`
			\| --- ^^^^^^^^^^^^^ expected `MustBeCopy<T>`, found `()`
			`\| \|`
			\| implicitly returns `()` as its body has no tail or `return` expression
			`\|`
			= note: expected struct `MustBeCopy<T>`
			found unit type `()`

			`error: aborting due to 2 previous errors`
Moved compile-fail tests to ui tests. 2018-08-08 14:28:26 +02:00
Continue compilation after check_mod_type_wf errors 2024-02-09 12:17:55 +00:00			`Some errors have detailed explanations: E0277, E0308.`
			For more information about an error, try `rustc --explain E0277`.