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Do not call generate_fn_name_span in typeck.

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This commit is contained in:
Camille GILLOT 2022-07-14 17:27:49 +02:00
parent 613dc2204d
commit 362e6361d0
1 changed files with 7 additions and 9 deletions
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16
compiler/rustc_typeck/src/check/compare_method.rs
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@ -858,8 +858,7 @@ fn compare_synthetic_generics<'tcx>(
{
if impl_synthetic != trait_synthetic {
let impl_def_id = impl_def_id.expect_local();
let impl_hir_id = tcx.hir().local_def_id_to_hir_id(impl_def_id);
let impl_span = tcx.hir().span(impl_hir_id);
let impl_span = tcx.def_span(impl_def_id);
let trait_span = tcx.def_span(trait_def_id);
let mut err = struct_span_err!(
tcx.sess,
@ -878,17 +877,16 @@ fn compare_synthetic_generics<'tcx>(
// try taking the name from the trait impl
// FIXME: this is obviously suboptimal since the name can already be used
// as another generic argument
let new_name = tcx.sess.source_map().span_to_snippet(trait_span).ok()?;
let new_name = tcx.opt_item_name(trait_def_id)?;
let trait_m = trait_m.def_id.as_local()?;
let trait_m = tcx.hir().trait_item(hir::TraitItemId { def_id: trait_m });
let trait_m = tcx.hir().expect_trait_item(trait_m);
let impl_m = impl_m.def_id.as_local()?;
let impl_m = tcx.hir().impl_item(hir::ImplItemId { def_id: impl_m });
let impl_m = tcx.hir().expect_impl_item(impl_m);
// in case there are no generics, take the spot between the function name
// and the opening paren of the argument list
let new_generics_span =
tcx.sess.source_map().generate_fn_name_span(impl_span)?.shrink_to_hi();
let new_generics_span = tcx.def_ident_span(impl_def_id)?.shrink_to_hi();
// in case there are generics, just replace them
let generics_span =
impl_m.generics.span.substitute_dummy(new_generics_span);
@ -900,7 +898,7 @@ fn compare_synthetic_generics<'tcx>(
"try changing the `impl Trait` argument to a generic parameter",
vec![
// replace `impl Trait` with `T`
(impl_span, new_name),
(impl_span, new_name.to_string()),
// replace impl method generics with trait method generics
// This isn't quite right, as users might have changed the names
// of the generics, but it works for the common case
@ -917,7 +915,7 @@ fn compare_synthetic_generics<'tcx>(
err.span_label(impl_span, "expected `impl Trait`, found generic parameter");
(|| {
let impl_m = impl_m.def_id.as_local()?;
let impl_m = tcx.hir().impl_item(hir::ImplItemId { def_id: impl_m });
let impl_m = tcx.hir().expect_impl_item(impl_m);
let input_tys = match impl_m.kind {
hir::ImplItemKind::Fn(ref sig, _) => sig.decl.inputs,
_ => unreachable!(),