rust/tests/ui/feature-gates/feature-gate-unsized_locals.stderr

error[E0277]: the size for values of type `(dyn FnOnce() + 'static)` cannot be known at compilation time
  --> $DIR/feature-gate-unsized_locals.rs:1:9
   |
LL | fn f(f: dyn FnOnce()) {}
   |         ^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `(dyn FnOnce() + 'static)`
   = help: unsized fn params are gated as an unstable feature
help: you can use `impl Trait` as the argument type
   |
LL - fn f(f: dyn FnOnce()) {}
LL + fn f(f: impl FnOnce()) {}
   |
help: function arguments must have a statically known size, borrowed types always have a known size
   |
LL | fn f(f: &dyn FnOnce()) {}
   |         +

error: aborting due to 1 previous error

For more information about this 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 size for values of type `(dyn FnOnce() + 'static)` cannot be known at compilation time
On implicit `Sized` bound on fn argument, point at type instead of pattern Instead of ``` error[E0277]: the size for values of type `(dyn ThriftService<(), AssocType = _> + 'static)` cannot be known at compilation time --> $DIR/issue-59324.rs:23:20 \| LL \| fn with_factory<H>(factory: dyn ThriftService<()>) {} \| ^^^^^^^ doesn't have a size known at compile-time ``` output ``` error[E0277]: the size for values of type `(dyn ThriftService<(), AssocType = _> + 'static)` cannot be known at compilation time --> $DIR/issue-59324.rs:23:29 \| LL \| fn with_factory<H>(factory: dyn ThriftService<()>) {} \| ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time ``` 2024-09-27 00:45:02 +00:00			`--> $DIR/feature-gate-unsized_locals.rs:1:9`
Add #![feature(unsized_locals)]. 2018-05-29 00:10:09 +09:00			`\|`
Update ui test suite to use dyn 2019-05-28 14:46:13 -04:00			`LL \| fn f(f: dyn FnOnce()) {}`
On implicit `Sized` bound on fn argument, point at type instead of pattern Instead of ``` error[E0277]: the size for values of type `(dyn ThriftService<(), AssocType = _> + 'static)` cannot be known at compilation time --> $DIR/issue-59324.rs:23:20 \| LL \| fn with_factory<H>(factory: dyn ThriftService<()>) {} \| ^^^^^^^ doesn't have a size known at compile-time ``` output ``` error[E0277]: the size for values of type `(dyn ThriftService<(), AssocType = _> + 'static)` cannot be known at compilation time --> $DIR/issue-59324.rs:23:29 \| LL \| fn with_factory<H>(factory: dyn ThriftService<()>) {} \| ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time ``` 2024-09-27 00:45:02 +00:00			`\| ^^^^^^^^^^^^ doesn't have a size known at compile-time`
Add #![feature(unsized_locals)]. 2018-05-29 00:10:09 +09:00			`\|`
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			= help: the trait `Sized` is not implemented for `(dyn FnOnce() + 'static)`
Add unsized_fn_params feature 2020-10-16 17:46:59 -03:00			`= help: unsized fn params are gated as an unstable feature`
Tweak output for bare `dyn Trait` in arguments Fix #35825. 2022-12-14 18:51:55 -08:00			help: you can use `impl Trait` as the argument type
			`\|`
Show diff suggestion format on verbose replacement ``` error[E0610]: `{integer}` is a primitive type and therefore doesn't have fields --> $DIR/attempted-access-non-fatal.rs:7:15 \| LL \| let _ = 2.l; \| ^ \| help: if intended to be a floating point literal, consider adding a `0` after the period and a `f64` suffix \| LL - let _ = 2.l; LL + let _ = 2.0f64; \| ``` 2024-07-09 22:30:26 +00:00			`LL - fn f(f: dyn FnOnce()) {}`
			`LL + fn f(f: impl FnOnce()) {}`
			`\|`
Suggest borrowing in more unsized fn param cases 2020-07-10 18:11:40 -07:00			`help: function arguments must have a statically known size, borrowed types always have a known size`
			`\|`
fix suggestion for unsized function parameters 2021-04-18 19:35:23 +02:00			`LL \| fn f(f: &dyn FnOnce()) {}`
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			`\| +`
Add #![feature(unsized_locals)]. 2018-05-29 00:10:09 +09:00
Show number in error message even for one error Co-authored-by: Adrian <adrian.iosdev@gmail.com> 2023-11-21 15:44:16 +00:00			`error: aborting due to 1 previous error`
Add #![feature(unsized_locals)]. 2018-05-29 00:10:09 +09:00
			For more information about this error, try `rustc --explain E0277`.