1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/proc-macro/modify-ast.rs b/tests/ui/proc-macro/modify-ast.rs
new file mode 100644
index 000000000..ea9bf837c
--- /dev/null
+++ b/tests/ui/proc-macro/modify-ast.rs
@@ -0,0 +1,26 @@
+// run-pass
+// aux-build:modify-ast.rs
+
+extern crate modify_ast;
+
+use modify_ast::*;
+
+#[derive(Foo)]
+pub struct MyStructc {
+    #[cfg_attr(my_cfg, foo)]
+    _a: i32,
+}
+
+macro_rules! a {
+    ($i:item) => ($i)
+}
+
+a! {
+    #[assert1]
+    pub fn foo() {}
+}
+
+fn main() {
+    let _a = MyStructc { _a: 0 };
+    foo();
+}