bjoernager/rust
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Teach structured errors to display short Ty

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Make it so that every structured error annotated with `#[derive(Diagnostic)]` that has a field of type `Ty<'_>`, the printing of that value into a `String` will look at the thread-local storage `TyCtxt` in order to shorten to a length appropriate with the terminal width. When this happen, the resulting error will have a note with the file where the full type name was written to.

```
error[E0618]: expected function, found `((..., ..., ..., ...), ..., ..., ...)``
 --> long.rs:7:5
  |
6 | fn foo(x: D) { //~ `x` has type `(...
  |        - `x` has type `((..., ..., ..., ...), ..., ..., ...)`
7 |     x(); //~ ERROR expected function, found `(...
  |     ^--
  |     |
  |     call expression requires function
  |
  = note: the full name for the type has been written to 'long.long-type-14182675702747116984.txt'
  = note: consider using `--verbose` to print the full type name to the console
```
This commit is contained in:
Esteban Küber 2025-02-18 01:15:59 +00:00
parent c51b9b6d52
commit d12ecaed55
42 changed files with 217 additions and 168 deletions
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8
compiler/rustc_const_eval/src/const_eval/error.rs
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@ -49,10 +49,10 @@ impl MachineStopType for ConstEvalErrKind {
| WriteThroughImmutablePointer => {}
AssertFailure(kind) => kind.add_args(adder),
Panic { msg, line, col, file } => {
adder("msg".into(), msg.into_diag_arg());
adder("file".into(), file.into_diag_arg());
adder("line".into(), line.into_diag_arg());
adder("col".into(), col.into_diag_arg());
adder("msg".into(), msg.into_diag_arg(&mut None));
adder("file".into(), file.into_diag_arg(&mut None));
adder("line".into(), line.into_diag_arg(&mut None));
adder("col".into(), col.into_diag_arg(&mut None));
}
}
}