Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/src/test/ui/macros/rfc-3086-metavar-expr/dollar-dollar-has-correct-behavior.rs b/src/test/ui/macros/rfc-3086-metavar-expr/dollar-dollar-has-correct-behavior.rs
new file mode 100644
index 000000000..ed94c27cf
--- /dev/null
+++ b/src/test/ui/macros/rfc-3086-metavar-expr/dollar-dollar-has-correct-behavior.rs
@@ -0,0 +1,28 @@
+// run-pass
+
+#![feature(macro_metavar_expr)]
+
+macro_rules! nested {
+    ( $a:ident ) => {
+        macro_rules! $a {
+            ( $$( $b:ident ),* ) => {
+                $$(
+                    macro_rules! $b {
+                        ( $$$$( $c:ident ),* ) => {
+                            $$$$(
+                                fn $c() -> &'static str { stringify!($c) }
+                            ),*
+                        };
+                    }
+                )*
+            };
+        }
+    };
+}
+
+fn main() {
+    nested!(a);
+    a!(b);
+    b!(c);
+    assert_eq!(c(), "c");
+}