fix(lexer): not skipped whitespace warning for '\x0c'

1 files changed, 21 insertions, 1 deletions

diff --git a/tests/ui/str/str-escape.rs b/tests/ui/str/str-escape.rs
index 0264632fd24..10a72421f24 100644
--- a/tests/ui/str/str-escape.rs
+++ b/tests/ui/str/str-escape.rs
@@ -1,11 +1,31 @@
 // check-pass
+// ignore-tidy-tab
+
 fn main() {
     let s = "\
 
              ";
     //~^^^ WARNING multiple lines skipped by escaped newline
+    assert_eq!(s, "");
+
     let s = "foo\
              bar
              ";
-    //~^^^ WARNING non-ASCII whitespace symbol '\u{a0}' is not skipped
+    //~^^^ WARNING whitespace symbol '\u{a0}' is not skipped
+    assert_eq!(s, "foo           bar\n             ");
+
+    let s = "a\
+ b";
+    assert_eq!(s, "ab");
+
+    let s = "a\
+	b";
+    assert_eq!(s, "ab");
+
+    let s = "a\
+    b";
+    //~^^ WARNING whitespace symbol '\u{c}' is not skipped
+    // '\x0c' is ASCII whitespace, but it may not need skipped
+    // discussion: https://github.com/rust-lang/rust/pull/108403
+    assert_eq!(s, "a\x0cb");
 }