44 lines
991 B
Rust
44 lines
991 B
Rust
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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![allow(unreachable_code)]
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macro_rules! x {
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($a:lifetime) => {
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$a: loop {
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break $a;
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panic!("failed");
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}
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}
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}
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macro_rules! br {
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($a:lifetime) => {
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break $a;
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}
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}
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macro_rules! br2 {
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($b:lifetime) => {
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'b: loop {
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break $b; // this $b should refer to the outer loop.
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}
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}
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}
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fn main() {
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x!('a);
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'c: loop {
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br!('c);
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panic!("failed");
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}
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'b: loop {
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br2!('b);
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panic!("failed");
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}
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}
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