src/test/run-pass/issue-24085.rs

   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 occuring 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 #[derive(Copy,Clone)]
  16 struct Path<'a:'b, 'b> {
  17     x: &'a i32,
  18     tail: Option<&'b Path<'a, 'b>>
  19 }
  20
  21 #[allow(dead_code, unconditional_recursion)]
  22 fn foo<'a,'b,F>(p: Path<'a, 'b>, mut f: F)
  23                 where F: for<'c> FnMut(Path<'a, 'c>) {
  24     foo(p, |x| f(x))
  25 }
  26
  27 fn main() { }