07e7823c01
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.
39 lines
1.4 KiB
Plaintext
39 lines
1.4 KiB
Plaintext
error[E0277]: `T` cannot be shared between threads safely
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--> $DIR/phantom-oibit.rs:21:12
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LL | fn is_zen<T: Zen>(_: T) {}
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| --- required by this bound in `is_zen`
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...
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LL | is_zen(x)
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| ^ `T` cannot be shared between threads safely
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= note: required because of the requirements on the impl of `Zen` for `&T`
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= note: required because it appears within the type `PhantomData<&T>`
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= note: required because it appears within the type `Guard<'_, T>`
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help: consider restricting type parameter `T`
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LL | fn not_sync<T: Sync>(x: Guard<T>) {
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| ^^^^^^
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error[E0277]: `T` cannot be shared between threads safely
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--> $DIR/phantom-oibit.rs:26:12
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LL | fn is_zen<T: Zen>(_: T) {}
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| --- required by this bound in `is_zen`
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...
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LL | is_zen(x)
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| ^ `T` cannot be shared between threads safely
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= note: required because of the requirements on the impl of `Zen` for `&T`
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= note: required because it appears within the type `PhantomData<&T>`
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= note: required because it appears within the type `Guard<'_, T>`
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= note: required because it appears within the type `Nested<Guard<'_, T>>`
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help: consider restricting type parameter `T`
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LL | fn nested_not_sync<T: Sync>(x: Nested<Guard<T>>) {
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| ^^^^^^
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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