1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // aux-build:two_macros.rs
13 macro_rules! foo { () => {} }
14 macro_rules! macro_one { () => {} }
15 #[macro_use(macro_two)] extern crate two_macros;
17 macro_rules! m1 { () => {
18 macro_rules! foo { () => {} } //~ ERROR `foo` is already in scope
19 //~^ NOTE macro-expanded `macro_rules!`s may not shadow existing macros
21 #[macro_use] //~ ERROR `macro_two` is already in scope
22 //~^ NOTE macro-expanded `#[macro_use]`s may not shadow existing macros
23 extern crate two_macros as __;
25 m1!(); //~ NOTE in this expansion
26 //~| NOTE in this expansion
27 //~| NOTE in this expansion
28 //~| NOTE in this expansion
32 macro_rules! m2 { () => {
33 macro_rules! foo { () => {} }
37 //^ Since `foo` is not used outside this expansion, it is not a shadowing error.