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Rollup merge of #121085 - davidtwco:always-eager-diagnostics, r=nnethercote

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errors: only eagerly translate subdiagnostics

Subdiagnostics don't need to be lazily translated, they can always be eagerly translated. Eager translation is slightly more complex as we need to have a `DiagCtxt` available to perform the translation, which involves slightly more threading of that context.

This slight increase in complexity should enable later simplifications - like passing `DiagCtxt` into `AddToDiagnostic` and moving Fluent messages into the diagnostic structs rather than having them in separate files (working on that was what led to this change).

r? ```@nnethercote```
This commit is contained in:
Matthias Krüger 2024-02-17 18:47:40 +01:00 • committed by GitHub
commit 45d5773704
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43 changed files with 532 additions and 388 deletions
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compiler/rustc_parse/src/parser/diagnostics.rs
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@ -2350,7 +2350,7 @@ impl<'a> Parser<'a> {
let mut err = self.dcx().struct_span_err(span, msg);
let sp = self.sess.source_map().start_point(self.token.span);
if let Some(sp) = self.sess.ambiguous_block_expr_parse.borrow().get(&sp) {
err.subdiagnostic(ExprParenthesesNeeded::surrounding(*sp));
err.subdiagnostic(self.dcx(), ExprParenthesesNeeded::surrounding(*sp));
}
err.span_label(span, "expected expression");