1 files changed, 11 insertions, 7 deletions
diff --git a/compiler/rustc_lexer/src/lib.rs b/compiler/rustc_lexer/src/lib.rs
index 29335a8c0..43dfd34a6 100644
--- a/compiler/rustc_lexer/src/lib.rs
+++ b/compiler/rustc_lexer/src/lib.rs
@@ -34,6 +34,7 @@ pub use crate::cursor::Cursor;
 use self::LiteralKind::*;
 use self::TokenKind::*;
 use crate::cursor::EOF_CHAR;
+use unicode_properties::UnicodeEmoji;
 
 /// Parsed token.
 /// It doesn't contain information about data that has been parsed,
@@ -367,6 +368,13 @@ impl Cursor<'_> {
                 Some(|terminated| Byte { terminated }),
             ),
 
+            // c-string literal, raw c-string literal or identifier.
+            'c' => self.c_or_byte_string(
+                |terminated| CStr { terminated },
+                |n_hashes| RawCStr { n_hashes },
+                None,
+            ),
+
             // Identifier (this should be checked after other variant that can
             // start as identifier).
             c if is_id_start(c) => self.ident_or_unknown_prefix(),
@@ -421,9 +429,7 @@ impl Cursor<'_> {
                 Literal { kind, suffix_start }
             }
             // Identifier starting with an emoji. Only lexed for graceful error recovery.
-            c if !c.is_ascii() && unic_emoji_char::is_emoji(c) => {
-                self.fake_ident_or_unknown_prefix()
-            }
+            c if !c.is_ascii() && c.is_emoji_char() => self.fake_ident_or_unknown_prefix(),
             _ => Unknown,
         };
         let res = Token::new(token_kind, self.pos_within_token());
@@ -507,9 +513,7 @@ impl Cursor<'_> {
         // we see a prefix here, it is definitely an unknown prefix.
         match self.first() {
             '#' | '"' | '\'' => UnknownPrefix,
-            c if !c.is_ascii() && unic_emoji_char::is_emoji(c) => {
-                self.fake_ident_or_unknown_prefix()
-            }
+            c if !c.is_ascii() && c.is_emoji_char() => self.fake_ident_or_unknown_prefix(),
             _ => Ident,
         }
     }
@@ -518,7 +522,7 @@ impl Cursor<'_> {
         // Start is already eaten, eat the rest of identifier.
         self.eat_while(|c| {
             unicode_xid::UnicodeXID::is_xid_continue(c)
-                || (!c.is_ascii() && unic_emoji_char::is_emoji(c))
+                || (!c.is_ascii() && c.is_emoji_char())
                 || c == '\u{200d}'
         });
         // Known prefixes must have been handled earlier. So if