1 // Copyright 2012-2014 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 // ignore-pretty: pprust doesn't print hygiene output
13 // Test that labels injected by macros do not break hygiene. This
14 // checks cases where the macros invocations are under the rhs of a
17 // Issue #24278: The label/lifetime shadowing checker from #24162
18 // conservatively ignores hygiene, and thus issues warnings that are
19 // both true- and false-positives for this test.
23 // $e shouldn't be able to interact with this 'x
28 macro_rules! while_true {
30 // $e shouldn't be able to interact with this 'x
31 'x: while 1 + 1 == 2 { $e }
35 macro_rules! run_once {
38 'x: for _ in 0..1 { $e }
47 // this 'x should refer to the outer loop, lexically
68 while_true!(break 'x);
78 run_once!(continue 'x);