bjoernager/rust
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resolve: Centralize retrieval of items span and item name

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This commit is contained in:
Vadim Petrochenkov 2023-02-22 11:14:20 +04:00
parent c7f424b80a
commit 2a716f3563
5 changed files with 37 additions and 69 deletions
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33
compiler/rustc_resolve/src/diagnostics.rs
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@ -12,7 +12,7 @@ use rustc_errors::{struct_span_err, SuggestionStyle};
use rustc_feature::BUILTIN_ATTRIBUTES;
use rustc_hir::def::Namespace::{self, *};
use rustc_hir::def::{self, CtorKind, CtorOf, DefKind, NonMacroAttrKind, PerNS};
use rustc_hir::def_id::{DefId, CRATE_DEF_ID, LOCAL_CRATE};
use rustc_hir::def_id::{DefId, CRATE_DEF_ID};
use rustc_hir::PrimTy;
use rustc_middle::bug;
use rustc_middle::ty::TyCtxt;
@ -555,25 +555,22 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
return err;
}
Res::SelfTyAlias { alias_to: def_id, .. } => {
if let Some(impl_span) = self.opt_span(def_id) {
err.span_label(
reduce_impl_span_to_impl_keyword(sm, impl_span),
"`Self` type implicitly declared here, by this `impl`",
);
}
err.span_label(
reduce_impl_span_to_impl_keyword(sm, self.def_span(def_id)),
"`Self` type implicitly declared here, by this `impl`",
);
err.span_label(span, "use a type here instead");
return err;
}
Res::Def(DefKind::TyParam, def_id) => {
if let Some(span) = self.opt_span(def_id) {
err.span_label(span, "type parameter from outer function");
}
err.span_label(self.def_span(def_id), "type parameter from outer function");
def_id
}
Res::Def(DefKind::ConstParam, def_id) => {
if let Some(span) = self.opt_span(def_id) {
err.span_label(span, "const parameter from outer function");
}
err.span_label(
self.def_span(def_id),
"const parameter from outer function",
);
def_id
}
_ => {
@ -589,7 +586,7 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
// Try to retrieve the span of the function signature and generate a new
// message with a local type or const parameter.
let sugg_msg = "try using a local generic parameter instead";
let name = self.opt_name(def_id).unwrap_or(sym::T);
let name = self.tcx.item_name(def_id);
let (span, snippet) = if span.is_empty() {
let snippet = format!("<{}>", name);
(span, snippet)
@ -1369,8 +1366,8 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
}
if ident.name == kw::Default
&& let ModuleKind::Def(DefKind::Enum, def_id, _) = parent_scope.module.kind
&& let Some(span) = self.opt_span(def_id)
{
let span = self.def_span(def_id);
let source_map = self.tcx.sess.source_map();
let head_span = source_map.guess_head_span(span);
if let Ok(head) = source_map.span_to_snippet(head_span) {
@ -1446,11 +1443,7 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
Some(suggestion) if suggestion.candidate == kw::Underscore => return false,
Some(suggestion) => suggestion,
};
let def_span = suggestion.res.opt_def_id().and_then(|def_id| match def_id.krate {
LOCAL_CRATE => self.opt_span(def_id),
_ => Some(self.cstore().get_span_untracked(def_id, self.tcx.sess)),
});
if let Some(def_span) = def_span {
if let Some(def_span) = suggestion.res.opt_def_id().map(|def_id| self.def_span(def_id)) {
if span.overlaps(def_span) {
// Don't suggest typo suggestion for itself like in the following:
// error[E0423]: expected function, tuple struct or tuple variant, found struct `X`