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.
26 lines
807 B
Plaintext
26 lines
807 B
Plaintext
error[E0308]: mismatched types
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--> $DIR/issue-57741-1.rs:14:9
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LL | let y = match x {
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| - this expression has type `Box<u32>`
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LL | S::A { a } | S::B { b: a } => a,
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| ^^^^^^^^^^ expected struct `Box`, found enum `S`
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= note: expected struct `Box<u32>`
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found enum `S`
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error[E0308]: mismatched types
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--> $DIR/issue-57741-1.rs:14:22
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LL | let y = match x {
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| - this expression has type `Box<u32>`
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LL | S::A { a } | S::B { b: a } => a,
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| ^^^^^^^^^^^^^ expected struct `Box`, found enum `S`
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= note: expected struct `Box<u32>`
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found enum `S`
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0308`.
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