Auto merge of #45846 - pietroalbini:use-nested-groups, r=petrochenkov

Add nested groups in imports

This PR adds support for nested groups in imports (rust-lang/rfcs#2128, tracking issue #44494).

r? @petrochenkov

1 files changed, 31 insertions, 0 deletions

diff --git a/src/test/compile-fail/feature-gate-use_nested_groups.rs b/src/test/compile-fail/feature-gate-use_nested_groups.rs
new file mode 100644
index 00000000000..56413a999d7
--- /dev/null
+++ b/src/test/compile-fail/feature-gate-use_nested_groups.rs
@@ -0,0 +1,31 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![allow(unused_imports, dead_code)]
+
+mod a {
+    pub enum B {}
+    pub enum C {}
+
+    pub mod d {
+        pub enum E {}
+        pub enum F {}
+
+        pub mod g {
+            pub enum H {}
+        }
+    }
+}
+
+use a::{B, d::{*, g::H}};  //~ ERROR glob imports in `use` groups are experimental
+                           //~^ ERROR nested groups in `use` are experimental
+                           //~^^ ERROR paths in `use` groups are experimental
+
+fn main() {}