Improve handling of raw-idents in check-cfg

2 files changed, 13 insertions, 4 deletions

diff --git a/compiler/rustc_lint/src/context/diagnostics/check_cfg.rs b/compiler/rustc_lint/src/context/diagnostics/check_cfg.rs
index ddaa819df14..38c4e48928f 100644
--- a/compiler/rustc_lint/src/context/diagnostics/check_cfg.rs
+++ b/compiler/rustc_lint/src/context/diagnostics/check_cfg.rs
@@ -2,6 +2,7 @@ use rustc_middle::bug;
 use rustc_session::config::ExpectedValues;
 use rustc_session::Session;
 use rustc_span::edit_distance::find_best_match_for_name;
+use rustc_span::symbol::Ident;
 use rustc_span::{sym, Span, Symbol};
 
 use crate::lints;
@@ -30,7 +31,7 @@ enum EscapeQuotes {
     No,
 }
 
-fn to_check_cfg_arg(name: Symbol, value: Option<Symbol>, quotes: EscapeQuotes) -> String {
+fn to_check_cfg_arg(name: Ident, value: Option<Symbol>, quotes: EscapeQuotes) -> String {
     if let Some(value) = value {
         let value = str::escape_debug(value.as_str()).to_string();
         let values = match quotes {
@@ -110,6 +111,7 @@ pub(super) fn unexpected_cfg_name(
                 }
             };
 
+            let best_match = Ident::new(best_match, name_span);
             if let Some((value, value_span)) = value {
                 if best_match_values.contains(&Some(value)) {
                     lints::unexpected_cfg_name::CodeSuggestion::SimilarNameAndValue {
@@ -163,6 +165,8 @@ pub(super) fn unexpected_cfg_name(
         };
         let expected_names = if !possibilities.is_empty() {
             let (possibilities, and_more) = sort_and_truncate_possibilities(sess, possibilities);
+            let possibilities: Vec<_> =
+                possibilities.into_iter().map(|s| Ident::new(s, name_span)).collect();
             Some(lints::unexpected_cfg_name::ExpectedNames {
                 possibilities: possibilities.into(),
                 and_more,
@@ -176,7 +180,9 @@ pub(super) fn unexpected_cfg_name(
         }
     };
 
-    let inst = |escape_quotes| to_check_cfg_arg(name, value.map(|(v, _s)| v), escape_quotes);
+    let inst = |escape_quotes| {
+        to_check_cfg_arg(Ident::new(name, name_span), value.map(|(v, _s)| v), escape_quotes)
+    };
 
     let invocation_help = if is_from_cargo {
         let sub = if !is_feature_cfg { Some(cargo_help_sub(sess, &inst)) } else { None };
@@ -273,7 +279,9 @@ pub(super) fn unexpected_cfg_value(
         || (matches!(sess.psess.unstable_features, rustc_feature::UnstableFeatures::Cheat)
             && !sess.opts.unstable_opts.ui_testing);
 
-    let inst = |escape_quotes| to_check_cfg_arg(name, value.map(|(v, _s)| v), escape_quotes);
+    let inst = |escape_quotes| {
+        to_check_cfg_arg(Ident::new(name, name_span), value.map(|(v, _s)| v), escape_quotes)
+    };
 
     let invocation_help = if is_from_cargo {
         let help = if name == sym::feature {
diff --git a/compiler/rustc_lint/src/lints.rs b/compiler/rustc_lint/src/lints.rs
index a2ccb93347a..7fabfc9a784 100644
--- a/compiler/rustc_lint/src/lints.rs
+++ b/compiler/rustc_lint/src/lints.rs
@@ -2180,6 +2180,7 @@ pub(crate) struct UnexpectedCfgName {
 pub(crate) mod unexpected_cfg_name {
     use rustc_errors::DiagSymbolList;
     use rustc_macros::Subdiagnostic;
+    use rustc_span::symbol::Ident;
     use rustc_span::{Span, Symbol};
 
     #[derive(Subdiagnostic)]
@@ -2260,7 +2261,7 @@ pub(crate) mod unexpected_cfg_name {
     #[derive(Subdiagnostic)]
     #[help_once(lint_unexpected_cfg_name_expected_names)]
     pub(crate) struct ExpectedNames {
-        pub possibilities: DiagSymbolList,
+        pub possibilities: DiagSymbolList<Ident>,
         pub and_more: usize,
     }