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add doc comment detail

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This commit is contained in:
Esteban Küber 2025-02-18 20:45:27 +00:00
parent 26f74ef586
commit a4e89deb52
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6
compiler/rustc_errors/src/diagnostic.rs
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@ -148,6 +148,12 @@ where
/// converted rather than on `DiagArgValue`, which enables types from other `rustc_*` crates to
/// implement this.
pub trait IntoDiagArg {
/// Convert `Self` into a `DiagArgValue` suitable for rendering in a diagnostic.
///
/// It takes a `path` where "long values" could be written to, if the `DiagArgValue` is too big
/// for displaying on the terminal. This path comes from the `Diag` itself. When rendering
/// values that come from `TyCtxt`, like `Ty<'_>`, they can use `TyCtxt::short_string`. If a
/// value has no shortening logic that could be used, the argument can be safely ignored.
fn into_diag_arg(self, path: &mut Option<std::path::PathBuf>) -> DiagArgValue;
}