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Use chaining in DiagnosticBuilder construction.

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To avoid the use of a mutable local variable, and because it reads more
nicely.
This commit is contained in:
Nicholas Nethercote
2024-01-03 16:00:29 +11:00
parent b1b9278851
commit 589591efde
22 changed files with 223 additions and 369 deletions
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6
compiler/rustc_hir_analysis/src/check/wfcheck.rs
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@@ -1921,10 +1921,8 @@ fn check_mod_type_wf(tcx: TyCtxt<'_>, module: LocalModDefId) -> Result<(), Error
}
fn error_392(tcx: TyCtxt<'_>, span: Span, param_name: Symbol) -> DiagnosticBuilder<'_> {
let mut err =
struct_span_err!(tcx.dcx(), span, E0392, "parameter `{param_name}` is never used");
err.span_label(span, "unused parameter");
err
struct_span_err!(tcx.dcx(), span, E0392, "parameter `{param_name}` is never used")
.span_label_mv(span, "unused parameter")
}
pub fn provide(providers: &mut Providers) {