45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
// Copyright 2015 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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// Regression test for #23729
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fn main() {
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let fib = {
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struct Recurrence {
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mem: [u64; 2],
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pos: usize,
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}
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impl Iterator for Recurrence {
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//~^ ERROR E0046
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//~| NOTE missing `Item` in implementation
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#[inline]
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fn next(&mut self) -> Option<u64> {
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if self.pos < 2 {
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let next_val = self.mem[self.pos];
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self.pos += 1;
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Some(next_val)
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} else {
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let next_val = self.mem[0] + self.mem[1];
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self.mem[0] = self.mem[1];
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self.mem[1] = next_val;
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Some(next_val)
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}
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}
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}
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Recurrence { mem: [0, 1], pos: 0 }
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};
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for e in fib.take(10) {
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println!("{}", e)
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}
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}
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