1 files changed, 31 insertions, 0 deletions
diff --git a/tests/ui/consts/const-eval/strlen.rs b/tests/ui/consts/const-eval/strlen.rs
new file mode 100644
index 000000000..7b14a5235
--- /dev/null
+++ b/tests/ui/consts/const-eval/strlen.rs
@@ -0,0 +1,31 @@
+// run-pass
+
+const S: &str = "foo";
+pub const B: &[u8] = S.as_bytes();
+pub const C: usize = B.len();
+pub const D: bool = B.is_empty();
+pub const E: bool = S.is_empty();
+pub const F: usize = S.len();
+
+pub fn foo() -> [u8; S.len()] {
+    let mut buf = [0; S.len()];
+    for (i, &c) in S.as_bytes().iter().enumerate() {
+        buf[i] = c;
+    }
+    buf
+}
+
+fn main() {
+    assert_eq!(&foo()[..], b"foo");
+    assert_eq!(foo().len(), S.len());
+    const LEN: usize = S.len();
+    assert_eq!(LEN, S.len());
+    assert_eq!(B, foo());
+    assert_eq!(B, b"foo");
+    assert_eq!(C, 3);
+    assert_eq!(F, 3);
+    assert!(!D);
+    assert!(!E);
+    const EMPTY: bool = "".is_empty();
+    assert!(EMPTY);
+}