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-rw-r--r--src/test/ui/macros/rfc-3086-metavar-expr/dollar-dollar-has-correct-behavior.rs28
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");
+}