bjoernager/rust
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Split diagnostic details out into a separate function and fluent files

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This commit is contained in:
Oli Scherer 2022-10-25 18:28:04 +00:00
parent 8286ea5a49
commit 1c26a278f3
4 changed files with 57 additions and 26 deletions
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48
compiler/rustc_hir_analysis/src/collect.rs
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@ -1294,34 +1294,38 @@ fn impl_trait_ref(tcx: TyCtxt<'_>, def_id: DefId) -> Option<ty::TraitRef<'_>> {
&icx,
ast_trait_ref,
selfty,
match impl_.constness {
hir::Constness::Const => {
if let Some(trait_def_id) = ast_trait_ref.trait_def_id() && !tcx.has_attr(trait_def_id, sym::const_trait) {
let trait_name = tcx.item_name(trait_def_id);
let mut err = tcx.sess.struct_span_err(
ast_trait_ref.path.span,
&format!("const `impl` for trait `{trait_name}` which is not marked with `#[const_trait]`"),
);
if trait_def_id.is_local() {
let sp = tcx.def_span(trait_def_id).shrink_to_lo();
err.span_suggestion(sp, &format!("mark `{trait_name}` as const"), "#[const_trait]", rustc_errors::Applicability::MachineApplicable);
}
err.note("marking a trait with `#[const_trait]` ensures all default method bodies are `const`");
err.note("adding a non-const method body in the future would be a breaking change");
err.emit();
ty::BoundConstness::NotConst
} else {
ty::BoundConstness::ConstIfConst
}
},
hir::Constness::NotConst => ty::BoundConstness::NotConst,
},
check_impl_constness(tcx, impl_.constness, ast_trait_ref),
)
}),
_ => bug!(),
}
}
fn check_impl_constness(
tcx: TyCtxt<'_>,
constness: hir::Constness,
ast_trait_ref: &hir::TraitRef<'_>,
) -> ty::BoundConstness {
match constness {
hir::Constness::Const => {
if let Some(trait_def_id) = ast_trait_ref.trait_def_id() && !tcx.has_attr(trait_def_id, sym::const_trait) {
let trait_name = tcx.item_name(trait_def_id).to_string();
tcx.sess.emit_err(errors::ConstImplForNonConstTrait {
trait_ref_span: ast_trait_ref.path.span,
trait_name,
local_trait_span: trait_def_id.as_local().map(|_| tcx.def_span(trait_def_id).shrink_to_lo()),
marking: (),
adding: (),
});
ty::BoundConstness::NotConst
} else {
ty::BoundConstness::ConstIfConst
}
},
hir::Constness::NotConst => ty::BoundConstness::NotConst,
}
}
fn impl_polarity(tcx: TyCtxt<'_>, def_id: DefId) -> ty::ImplPolarity {
let is_rustc_reservation = tcx.has_attr(def_id, sym::rustc_reservation_impl);
let item = tcx.hir().expect_item(def_id.expect_local());