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errors: introduce DiagnosticMessage

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Introduce a `DiagnosticMessage` type that will enable diagnostic
messages to be simple strings or Fluent identifiers.
`DiagnosticMessage` is now used in the implementation of the standard
`DiagnosticBuilder` APIs.

Signed-off-by: David Wood <david.wood@huawei.com>
This commit is contained in:
David Wood 2022-03-23 07:34:20 +00:00
parent a22cf2af05
commit 8c684563a5
10 changed files with 79 additions and 43 deletions
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3
compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
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@ -780,7 +780,8 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
if has_custom_message {
err.note(&msg);
} else {
err.message = vec![(msg, Style::NoStyle)];
err.message =
vec![(rustc_errors::DiagnosticMessage::Str(msg), Style::NoStyle)];
}
if snippet.starts_with('&') {
// This is already a literal borrow and the obligation is failing