add a test case for decl_macro

Author: TaKO8Ki

src/test/ui/privacy/macro-private-reexport.rs

@@ -1,11 +1,17 @@
 // edition:2021
 
+#![feature(decl_macro)]
+
 mod foo {
     macro_rules! bar {
         () => {};
     }
 
     pub use bar as _; //~ ERROR `bar` is only public within the crate, and cannot be re-exported outside
+
+    macro baz() {}
+
+    pub use baz as _; //~ ERROR `baz` is private, and cannot be re-exported
 }
 
 fn main() {}

src/test/ui/privacy/macro-private-reexport.stderr

@@ -1,17 +1,29 @@
 error[E0364]: `bar` is only public within the crate, and cannot be re-exported outside
-  --> $DIR/macro-private-reexport.rs:8:13
+  --> $DIR/macro-private-reexport.rs:10:13
    |
 LL |     pub use bar as _;
    |             ^^^^^^^^
    |
 help: consider adding a `#[macro_export]` to the macro in the imported module
-  --> $DIR/macro-private-reexport.rs:4:5
+  --> $DIR/macro-private-reexport.rs:6:5
    |
 LL | /     macro_rules! bar {
 LL | |         () => {};
 LL | |     }
    | |_____^
 
-error: aborting due to previous error
+error[E0364]: `baz` is private, and cannot be re-exported
+  --> $DIR/macro-private-reexport.rs:14:13
+   |
+LL |     pub use baz as _;
+   |             ^^^^^^^^
+   |
+note: consider marking `baz` as `pub` in the imported module
+  --> $DIR/macro-private-reexport.rs:14:13
+   |
+LL |     pub use baz as _;
+   |             ^^^^^^^^
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0364`.