src/test/ui/traits/traits-issue-23003-overflow.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 // A variant of traits-issue-23003 in which an infinite series of
  12 // types are required. This test now just compiles fine, since the
  13 // relevant rules that triggered the overflow were removed.
  14
  15 // compile-pass
  16 #![allow(dead_code)]
  17
  18 use std::marker::PhantomData;
  19
  20 trait Async {
  21     type Cancel;
  22 }
  23
  24 struct Receipt<A:Async> {
  25     marker: PhantomData<A>,
  26 }
  27
  28 struct Complete<B> {
  29     core: Option<B>,
  30 }
  31
  32 impl<B> Async for Complete<B> {
  33     type Cancel = Receipt<Complete<Option<B>>>;
  34 }
  35
  36 fn foo(_: Receipt<Complete<()>>) { }
  37
  38
  39 fn main() { }