45 lines
1.1 KiB
Rust
45 lines
1.1 KiB
Rust
// Copyright 2014 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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// Check that we do not ICE when compiling this
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// macro, which reuses the expression `$id`
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// pretty-expanded FIXME #23616
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#![feature(box_patterns)]
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#![feature(box_syntax)]
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struct Foo {
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a: isize
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}
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pub enum Bar {
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Bar1, Bar2(isize, Box<Bar>),
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}
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impl Foo {
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fn elaborate_stm(&mut self, s: Box<Bar>) -> Box<Bar> {
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macro_rules! declare {
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($id:expr, $rest:expr) => ({
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self.check_id($id);
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box Bar::Bar2($id, $rest)
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})
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}
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match s {
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box Bar::Bar2(id, rest) => declare!(id, self.elaborate_stm(rest)),
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_ => panic!()
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}
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}
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fn check_id(&mut self, s: isize) { panic!() }
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}
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pub fn main() { }
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