X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=crates%2Fhir_def%2Fsrc%2Fmacro_expansion_tests%2Fbuiltin_fn_macro.rs;h=919dd6c07f039a3c9977ec4870c4779fac429d98;hb=494fab202a7ec00f79636dcece8ca5e2742efff0;hp=6e91301ecdc896508286d327c77cf170355fe3ff;hpb=9946def7e224a2009e7ca3ca7f4ac032aeb0eb42;p=rust.git

diff --git a/crates/hir_def/src/macro_expansion_tests/builtin_fn_macro.rs b/crates/hir_def/src/macro_expansion_tests/builtin_fn_macro.rs
index 6e91301ecdc..919dd6c07f0 100644
--- a/crates/hir_def/src/macro_expansion_tests/builtin_fn_macro.rs
+++ b/crates/hir_def/src/macro_expansion_tests/builtin_fn_macro.rs
@@ -313,6 +313,24 @@ macro_rules! concat {}
     );
 }
 
+#[test]
+fn test_concat_bytes_expand() {
+    check(
+        r##"
+#[rustc_builtin_macro]
+macro_rules! concat_bytes {}
+
+fn main() { concat_bytes!(b'A', b"BC", [68, b'E', 70]); }
+"##,
+        expect![[r##"
+#[rustc_builtin_macro]
+macro_rules! concat_bytes {}
+
+fn main() { [b'A', 66, 67, 68, b'E', 70]; }
+"##]],
+    );
+}
+
 #[test]
 fn test_concat_with_captured_expr() {
     check(