feat: support concat_bytes

[rust.git] / crates / hir_def / src / macro_expansion_tests / builtin_fn_macro.rs

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 6982116522c6ce6fddfc6b7355ed73b391e49a7f..919dd6c07f039a3c9977ec4870c4779fac429d98 100644 (file)
--- a/crates/hir_def/src/macro_expansion_tests/builtin_fn_macro.rs
+++ b/crates/hir_def/src/macro_expansion_tests/builtin_fn_macro.rs
@@ -1,4 +1,4 @@
-//! Tests for builtin macros (see `builtin_macro.rs` in `hir_expand`).
+//! Tests for `builtin_fn_macro.rs` from `hir_expand`.
 
 use expect_test::expect;
 
@@ -313,6 +313,58 @@ 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(
+        r##"
+#[rustc_builtin_macro]
+macro_rules! concat {}
+
+macro_rules! surprise {
+    () => { "s" };
+}
+
+macro_rules! stuff {
+    ($string:expr) => { concat!($string) };
+}
+
+fn main() { concat!(surprise!()); }
+"##,
+        expect![[r##"
+#[rustc_builtin_macro]
+macro_rules! concat {}
+
+macro_rules! surprise {
+    () => { "s" };
+}
+
+macro_rules! stuff {
+    ($string:expr) => { concat!($string) };
+}
+
+fn main() { "s"; }
+"##]],
+    );
+}
+
 #[test]
 fn test_concat_idents_expand() {
     check(