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//@ run-pass
#![allow(dead_code)]
#![allow(unused_variables)]
#![allow(unconditional_recursion)]
// Check that we do not ICE when compiling this
// macro, which reuses the expression `$id`
#![feature(box_patterns)]
struct Foo {
a: isize
}
pub enum Bar {
Bar1, Bar2(isize, Box<Bar>),
}
impl Foo {
fn elaborate_stm(&mut self, s: Box<Bar>) -> Box<Bar> {
macro_rules! declare {
($id:expr, $rest:expr) => ({
self.check_id($id);
Box::new(Bar::Bar2($id, $rest))
})
}
match s {
box Bar::Bar2(id, rest) => declare!(id, self.elaborate_stm(rest)),
_ => panic!()
}
}
fn check_id(&mut self, s: isize) { panic!() }
}
pub fn main() { }
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