1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
4 //
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
10
11 // Regression test for #24085. Errors were occurring in region
12 // inference due to the requirement that `'a:b'`, which was getting
13 // incorrectly translated in connection with the closure below.
14
15 #![allow(clippy::redundant_closure)]
16
17 #[cfg(feature = "use_core")]
18 extern crate core;
19
20 #[macro_use]
21 extern crate derivative;
22
23 #[derive(Derivative)]
24 #[derivative(Copy,Clone)]
25 #[allow(dead_code)]
26 struct Path<'a:'b, 'b> {
27 x: &'a i32,
28 tail: Option<&'b Path<'a, 'b>>
29 }
30
31 #[allow(dead_code, unconditional_recursion)]
foo<'a,'b,F>(p: Path<'a, 'b>, mut f: F) where F: for<'c> FnMut(Path<'a, 'c>)32 fn foo<'a,'b,F>(p: Path<'a, 'b>, mut f: F)
33 where F: for<'c> FnMut(Path<'a, 'c>) {
34 foo(p, |x| f(x))
35 }
36
37 #[test]
main()38 fn main() { }
39