src/test/compile-fail/extern-crate-visibility.rs

   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.
   4 //
   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.
  10
  11 #![feature(rustc_attrs)]
  12 #![allow(dead_code)]
  13 #![allow(unused_imports)]
  14
  15 mod foo {
  16     extern crate core;
  17 }
  18
  19 // Check that private crates can be used from outside their modules, albeit with warnings
  20 use foo::core; //~ WARN extern crate `core` is private
  21 //~^ WARN this was previously accepted by the compiler but is being phased out
  22 use foo::core::cell; //~ WARN extern crate `core` is private
  23 //~^ WARN this was previously accepted by the compiler but is being phased out
  24
  25 fn f() {
  26     foo::core::cell::Cell::new(0); //~ WARN extern crate `core` is private
  27     //~^ WARN this was previously accepted by the compiler but is being phased out
  28
  29     use foo::*;
  30     mod core {} // Check that private crates are not glob imported
  31 }
  32
  33 mod bar {
  34     pub extern crate core;
  35 }
  36
  37 mod baz {
  38     pub use bar::*;
  39     use self::core::cell; // Check that public extern crates are glob imported
  40 }
  41
  42 #[rustc_error]
  43 fn main() {} //~ ERROR compilation successful