10000 Only emit one error per unsized binding, instead of one per usage by estebank · Pull Request #113183 · rust-lang/rust · GitHub
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Only emit one error per unsized binding, instead of one per usage #113183

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Merged
merged 4 commits into from
Oct 27, 2023
Merged

Only emit one error per unsized binding, instead of one per usage #113183

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3d86b8a
Add test for #56607
estebank Jun 30, 2023
2f79681
Only emit one error per unsized binding, instead of one per usage
estebank Jun 30, 2023
124d6d8
Remove need for `has_errors()` check
estebank Oct 9, 2023
568b316
Move predicate error early check to its own method
estebank Oct 9, 2023
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Move predicate error early check to its own method
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@estebank
estebank committed Oct 9, 2023
commit 568b316ce3ec25aaaecf8e63a7b3a1301f016d4c
37 changes: 23 additions & 14 deletions compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,8 @@ pub trait TypeErrCtxtExt<'tcx> {
error: &SelectionError<'tcx>,
);

fn fn_arg_obligation(&self, obligation: &PredicateObligation<'tcx>) -> bool;

fn report_const_param_not_wf(
&self,
ty: Ty<'tcx>,
Expand Down Expand Up @@ -434,20 +436,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
{
return;
}
if let ObligationCauseCode::FunctionArgumentObligation {
arg_hir_id,
..
} = obligation.cause.code()
&& let Some(Node::Expr(arg)) = self.tcx.hir().find(*arg_hir_id)
&& let arg = arg.peel_borrows()
&& let hir::ExprKind::Path(hir::QPath::Resolved(
None,
hir::Path { res: hir::def::Res::Local(hir_id), .. },
)) = arg.kind
&& let Some(Node::Pat(pat)) = self.tcx.hir().find(*hir_id)
&& let Some(preds) = self.reported_trait_errors.borrow().get(&pat.span)
&& preds.contains(&obligation.predicate)
{
if self.fn_arg_obligation(&obligation) {
// Silence redundant errors on binding acccess that are already
// reported on the binding definition (#56607).
return;
Expand Down Expand Up @@ -948,6 +937,26 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
err.emit();
}

fn fn_arg_obligation(&self, obligation: &PredicateObligation<'tcx>) -> bool {
if let ObligationCauseCode::FunctionArgumentObligation {
arg_hir_id,
..
} = obligation.cause.code()
&& let Some(Node::Expr(arg)) = self.tcx.hir().find(*arg_hir_id)
&& let arg = arg.peel_borrows()
&& let hir::ExprKind::Path(hir::QPath::Resolved(
None,
hir::Path { res: hir::def::Res::Local(hir_id), .. },
)) = arg.kind
&& let Some(Node::Pat(pat)) = self.tcx.hir().find(*hir_id)
&& let Some(preds) = self.reported_trait_errors.borrow().get(&pat.span)
&& preds.contains(&obligation.predicate)
{
return true;
}
false
}

fn report_const_param_not_wf(
&self,
ty: Ty<'tcx>,
Expand Down
0