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.
20 lines
601 B
Plaintext
20 lines
601 B
Plaintext
error[E0277]: the size for values of type `X` cannot be known at compilation time
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--> $DIR/unsized7.rs:12:21
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LL | trait T1<Z: T> {
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| - required by this bound in `T1`
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...
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LL | impl<X: ?Sized + T> T1<X> for S3<X> {
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| - ^^^^^ doesn't have a size known at compile-time
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| |
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| this type parameter needs to be `Sized`
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help: consider relaxing the implicit `Sized` restriction
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LL | trait T1<Z: T + ?Sized> {
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| ^^^^^^^^
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0277`.
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