rust/src/test/ui/rust-2018/uniform-paths/ambiguity-macros.rs

// Copyright 2018 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.

// edition:2018

// This test is similar to `ambiguity.rs`, but with macros defining local items.

use std::io;
//~^ ERROR `std` is ambiguous

macro_rules! m {
    () => {
        mod std {
            pub struct io;
        }
    }
}
m!();

fn main() {}