src/test/run-pass/issue-13323.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 // pretty-expanded FIXME #23616
  12
  13 #![allow(unknown_features)]
  14 #![feature(box_syntax)]
  15
  16 struct StrWrap {
  17     s: String
  18 }
  19
  20 impl StrWrap {
  21     fn new(s: &str) -> StrWrap {
  22         StrWrap { s: s.to_string() }
  23     }
  24
  25     fn get_s<'a>(&'a self) -> &'a str {
  26         &self.s
  27     }
  28 }
  29
  30 struct MyStruct {
  31     s: StrWrap
  32 }
  33
  34 impl MyStruct {
  35     fn new(s: &str) -> MyStruct {
  36         MyStruct { s: StrWrap::new(s) }
  37     }
  38
  39     fn get_str_wrap<'a>(&'a self) -> &'a StrWrap {
  40         &self.s
  41     }
  42 }
  43
  44 trait Matcher<T> {
  45     fn matches(&self, actual: T) -> bool;
  46 }
  47
  48 fn assert_that<T, U: Matcher<T>>(actual: T, matcher: &U) {
  49     assert!(matcher.matches(actual));
  50 }
  51
  52 struct EqualTo<T> {
  53     expected: T
  54 }
  55
  56 impl<T: Eq> Matcher<T> for EqualTo<T> {
  57     fn matches(&self, actual: T) -> bool {
  58         self.expected.eq(&actual)
  59     }
  60 }
  61
  62 fn equal_to<T: Eq>(expected: T) -> Box<EqualTo<T>> {
  63     box EqualTo { expected: expected }
  64 }
  65
  66 pub fn main() {
  67     let my_struct = MyStruct::new("zomg");
  68     let s = my_struct.get_str_wrap();
  69
  70     assert_that(s.get_s(), &*equal_to("zomg"));
  71 }