1 files changed, 53 insertions, 0 deletions
diff --git a/tests/ui/uniform-paths/macros-nested.rs b/tests/ui/uniform-paths/macros-nested.rs
new file mode 100644
index 00000000000..175ccd34e98
--- /dev/null
+++ b/tests/ui/uniform-paths/macros-nested.rs
@@ -0,0 +1,53 @@
+// This test is similar to `macros.rs`, but nested in modules.
+
+// run-pass
+// edition:2018
+
+#![allow(non_camel_case_types)]
+
+mod foo {
+    // Test that ambiguity errors are not emitted between `self::test` and
+    // `::test`, assuming the latter (crate) is not in `extern_prelude`.
+    macro_rules! m1 {
+        () => {
+            mod test {
+                pub struct Foo(pub ());
+            }
+        }
+    }
+    pub use test::Foo;
+    m1!();
+
+    // Test that qualified paths can refer to both the external crate and local item.
+    macro_rules! m2 {
+        () => {
+            mod std {
+                pub struct io(pub ());
+            }
+        }
+    }
+    pub use ::std::io as std_io;
+    pub use self::std::io as local_io;
+    m2!();
+}
+
+// Test that we can refer to the external crate unqualified
+// (when there isn't a local item with the same name).
+use std::io;
+
+mod bar {
+    // Also test the unqualified external crate import in a nested module,
+    // to show that the above import doesn't resolve through a local `std`
+    // item, e.g., the automatically injected `extern crate std;`, which in
+    // the Rust 2018 should no longer be visible through `crate::std`.
+    pub use std::io;
+}
+
+
+fn main() {
+    foo::Foo(());
+    let _ = foo::std_io::stdout();
+    foo::local_io(());
+    let _ = io::stdout();
+    let _ = bar::io::stdout();
+}