// Copyright 2014 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. struct Cursor<'a>(::std::marker::PhantomData<&'a ()>); trait CursorNavigator { fn init_cursor<'a, 'b:'a>(&'a self, cursor: &mut Cursor<'b>) -> bool; } struct SimpleNavigator; impl CursorNavigator for SimpleNavigator { fn init_cursor<'a, 'b: 'a>(&'a self, _cursor: &mut Cursor<'b>) -> bool { false } } fn main() { let mut c = Cursor(::std::marker::PhantomData); let n = SimpleNavigator; n.init_cursor(&mut c); }