1 files changed, 42 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/manual_is_ascii_check.rs b/src/tools/clippy/tests/ui/manual_is_ascii_check.rs
new file mode 100644
index 000000000..39ee6151c
--- /dev/null
+++ b/src/tools/clippy/tests/ui/manual_is_ascii_check.rs
@@ -0,0 +1,42 @@
+// run-rustfix
+
+#![allow(unused, dead_code)]
+#![warn(clippy::manual_is_ascii_check)]
+
+fn main() {
+    assert!(matches!('x', 'a'..='z'));
+    assert!(matches!('X', 'A'..='Z'));
+    assert!(matches!(b'x', b'a'..=b'z'));
+    assert!(matches!(b'X', b'A'..=b'Z'));
+
+    let num = '2';
+    assert!(matches!(num, '0'..='9'));
+    assert!(matches!(b'1', b'0'..=b'9'));
+    assert!(matches!('x', 'A'..='Z' | 'a'..='z'));
+
+    assert!(matches!('x', 'A'..='Z' | 'a'..='z' | '_'));
+}
+
+#[clippy::msrv = "1.23"]
+fn msrv_1_23() {
+    assert!(matches!(b'1', b'0'..=b'9'));
+    assert!(matches!('X', 'A'..='Z'));
+    assert!(matches!('x', 'A'..='Z' | 'a'..='z'));
+}
+
+#[clippy::msrv = "1.24"]
+fn msrv_1_24() {
+    assert!(matches!(b'1', b'0'..=b'9'));
+    assert!(matches!('X', 'A'..='Z'));
+    assert!(matches!('x', 'A'..='Z' | 'a'..='z'));
+}
+
+#[clippy::msrv = "1.46"]
+fn msrv_1_46() {
+    const FOO: bool = matches!('x', '0'..='9');
+}
+
+#[clippy::msrv = "1.47"]
+fn msrv_1_47() {
+    const FOO: bool = matches!('x', '0'..='9');
+}