Implement concat_bytes!

The tracking issue for this is #87555.

1 files changed, 42 insertions, 0 deletions

diff --git a/src/test/ui/macros/concat-bytes-error.rs b/src/test/ui/macros/concat-bytes-error.rs
new file mode 100644
index 00000000000..9b4a9c2cf81
--- /dev/null
+++ b/src/test/ui/macros/concat-bytes-error.rs
@@ -0,0 +1,42 @@
+#![feature(concat_bytes)]
+
+fn main() {
+    concat_bytes!(pie); //~ ERROR expected a byte literal
+    concat_bytes!(pie, pie); //~ ERROR expected a byte literal
+    concat_bytes!("tnrsi", "tnri"); //~ ERROR cannot concatenate string literals
+    concat_bytes!(2.8); //~ ERROR cannot concatenate float literals
+    concat_bytes!(300); //~ ERROR cannot concatenate numeric literals
+    concat_bytes!('a'); //~ ERROR cannot concatenate character literals
+    concat_bytes!(true, false); //~ ERROR cannot concatenate boolean literals
+    concat_bytes!(42, b"va", b'l'); //~ ERROR cannot concatenate numeric literals
+    concat_bytes!(42, b"va", b'l', [1, 2]); //~ ERROR cannot concatenate numeric literals
+    concat_bytes!([
+        "hi", //~ ERROR cannot concatenate string literals
+    ]);
+    concat_bytes!([
+        'a', //~ ERROR cannot concatenate character literals
+    ]);
+    concat_bytes!([
+        true, //~ ERROR cannot concatenate boolean literals
+    ]);
+    concat_bytes!([
+        false, //~ ERROR cannot concatenate boolean literals
+    ]);
+    concat_bytes!([
+        2.6, //~ ERROR cannot concatenate float literals
+    ]);
+    concat_bytes!([
+        265, //~ ERROR numeric literal is out of bounds
+    ]);
+    concat_bytes!([
+        -33, //~ ERROR expected a byte literal
+    ]);
+    concat_bytes!([
+        b"hi!", //~ ERROR cannot concatenate doubly nested array
+    ]);
+    concat_bytes!([
+        [5, 6, 7], //~ ERROR cannot concatenate doubly nested array
+    ]);
+    concat_bytes!(5u16); //~ ERROR cannot concatenate numeric literals
+    concat_bytes!([5u16]); //~ ERROR numeric literal is not a `u8`
+}