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.
68 lines
1.9 KiB
Text
68 lines
1.9 KiB
Text
error[E0606]: casting `&[i32]` as `usize` is invalid
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--> $DIR/fat-ptr-cast.rs:10:5
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LL | a as usize;
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| ^^^^^^^^^^
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= help: cast through a raw pointer first
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error[E0606]: casting `&[i32]` as `isize` is invalid
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--> $DIR/fat-ptr-cast.rs:11:5
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LL | a as isize;
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| ^^^^^^^^^^
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= help: cast through a raw pointer first
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error[E0606]: casting `&[i32]` as `i16` is invalid
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--> $DIR/fat-ptr-cast.rs:12:5
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LL | a as i16;
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| ^^^^^^^^
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= help: cast through a raw pointer first
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error[E0606]: casting `&[i32]` as `u32` is invalid
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--> $DIR/fat-ptr-cast.rs:13:5
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LL | a as u32;
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| ^^^^^^^^
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= help: cast through a raw pointer first
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error[E0605]: non-primitive cast: `Box<[i32]>` as `usize`
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--> $DIR/fat-ptr-cast.rs:14:5
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LL | b as usize;
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| ^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
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error[E0606]: casting `*const [i32]` as `usize` is invalid
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--> $DIR/fat-ptr-cast.rs:15:5
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LL | p as usize;
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| ^^^^^^^^^^
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= help: cast through a thin pointer first
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error[E0607]: cannot cast thin pointer `*const i32` to fat pointer `*const [i32]`
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--> $DIR/fat-ptr-cast.rs:19:5
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LL | q as *const [i32];
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| ^^^^^^^^^^^^^^^^^
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error[E0606]: casting `usize` as `*mut (dyn Trait + 'static)` is invalid
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--> $DIR/fat-ptr-cast.rs:22:41
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LL | let t: *mut (dyn Trait + 'static) = 0 as *mut _;
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| ^^^^^^^^^^^
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error[E0606]: casting `usize` as `*const str` is invalid
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--> $DIR/fat-ptr-cast.rs:23:32
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LL | let mut fail: *const str = 0 as *const str;
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| ^^^^^^^^^^^^^^^
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error: aborting due to 9 previous errors
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Some errors have detailed explanations: E0605, E0606, E0607.
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For more information about an error, try `rustc --explain E0605`.
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