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Fixes #109436: add parentheses properly

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This commit is contained in:
Mu42 2023-03-22 13:52:24 +08:00
parent 1db9c061d3
commit 20f3f437d1
3 changed files with 56 additions and 7 deletions
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35
compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
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@ -1358,6 +1358,34 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
Applicability::MaybeIncorrect,
);
} else {
let is_mut = mut_ref_self_ty_satisfies_pred || ref_inner_ty_mut;
let sugg_prefix = format!("&{}", if is_mut { "mut " } else { "" });
let sugg_msg = &format!(
"consider{} borrowing here",
if is_mut { " mutably" } else { "" }
);
// Issue #109436, we need to add parentheses properly for method calls
// for example, `foo.into()` should be `(&foo).into()`
if let Ok(snippet) = self
.tcx
.sess
.source_map()
.span_to_snippet(self.tcx.sess.source_map().next_point(span))
{
if snippet == "." {
err.multipart_suggestion_verbose(
sugg_msg,
vec![
(span.shrink_to_lo(), format!("({}", sugg_prefix)),
(span.shrink_to_hi(), ")".to_string()),
],
Applicability::MaybeIncorrect,
);
return true;
}
}
// Issue #104961, we need to add parentheses properly for compond expressions
// for example, `x.starts_with("hi".to_string() + "you")`
// should be `x.starts_with(&("hi".to_string() + "you"))`
@ -1374,14 +1402,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
_ => false,
};
let is_mut = mut_ref_self_ty_satisfies_pred || ref_inner_ty_mut;
let span = if needs_parens { span } else { span.shrink_to_lo() };
let sugg_prefix = format!("&{}", if is_mut { "mut " } else { "" });
let sugg_msg = &format!(
"consider{} borrowing here",
if is_mut { " mutably" } else { "" }
);
let suggestions = if !needs_parens {
vec![(span.shrink_to_lo(), format!("{}", sugg_prefix))]
} else {