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.
45 lines
1.5 KiB
Text
45 lines
1.5 KiB
Text
error[E0308]: `if` and `else` have incompatible types
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--> $DIR/str-array-assignment.rs:3:37
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LL | let t = if true { s[..2] } else { s };
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| ------ ^ expected `str`, found `&str`
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| |
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| expected because of this
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error[E0308]: mismatched types
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--> $DIR/str-array-assignment.rs:5:27
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LL | let u: &str = if true { s[..2] } else { s };
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| ^^^^^^
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| |
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| expected `&str`, found `str`
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| help: consider borrowing here: `&s[..2]`
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error[E0277]: the size for values of type `str` cannot be known at compilation time
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--> $DIR/str-array-assignment.rs:7:7
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LL | let v = s[..2];
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| ^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `str`
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= note: all local variables must have a statically known size
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= help: unsized locals are gated as an unstable feature
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help: consider borrowing here
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LL | let v = &s[..2];
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| ^
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error[E0308]: mismatched types
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--> $DIR/str-array-assignment.rs:9:17
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LL | let w: &str = s[..2];
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| ---- ^^^^^^
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| | |
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| | expected `&str`, found `str`
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| | help: consider borrowing here: `&s[..2]`
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| expected due to this
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error: aborting due to 4 previous errors
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Some errors have detailed explanations: E0277, E0308.
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For more information about an error, try `rustc --explain E0277`.
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