src/test/run-pass/traits/traits-issue-22019.rs

   1 // Copyright 2015 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 // run-pass
  12 // Test an issue where global caching was causing free regions from
  13 // distinct scopes to be compared (`'g` and `'h`). The only important
  14 // thing is that compilation succeeds here.
  15
  16 // pretty-expanded FIXME #23616
  17
  18 #![allow(missing_copy_implementations)]
  19 #![allow(unused_variables)]
  20
  21 use std::borrow::ToOwned;
  22
  23 pub struct CFGNode;
  24
  25 pub type Node<'a> = &'a CFGNode;
  26
  27 pub trait GraphWalk<'c, N> {
  28     /// Returns all the nodes in this graph.
  29     fn nodes(&'c self) where [N]:ToOwned<Owned=Vec<N>>;
  30 }
  31
  32 impl<'g> GraphWalk<'g, Node<'g>> for u32
  33 {
  34     fn nodes(&'g self) where [Node<'g>]:ToOwned<Owned=Vec<Node<'g>>>
  35     { loop { } }
  36 }
  37
  38 impl<'h> GraphWalk<'h, Node<'h>> for u64
  39 {
  40     fn nodes(&'h self) where [Node<'h>]:ToOwned<Owned=Vec<Node<'h>>>
  41     { loop { } }
  42 }
  43
  44 fn main()  { }