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// Regression test for #23729
fn main() {
let fib = {
struct Recurrence {
mem: [u64; 2],
pos: usize,
}
impl Iterator for Recurrence {
//~^ ERROR E0046
#[inline]
fn next(&mut self) -> Option<u64> {
if self.pos < 2 {
let next_val = self.mem[self.pos];
self.pos += 1;
Some(next_val)
} else {
let next_val = self.mem[0] + self.mem[1];
self.mem[0] = self.mem[1];
self.mem[1] = next_val;
Some(next_val)
}
}
}
Recurrence { mem: [0, 1], pos: 0 }
};
for e in fib.take(10) {
println!("{}", e)
}
}
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