src/test/run-pass/deriving-cmp-generic-struct.rs

   1 // Copyright 2013 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 #[deriving(Eq, TotalEq, Ord, TotalOrd)]
  12 struct S<T> {
  13     x: T,
  14     y: T
  15 }
  16
  17 pub fn main() {
  18     let s1 = S {x: 1, y: 1};
  19     let s2 = S {x: 1, y: 2};
  20
  21     // in order for both Ord and TotalOrd
  22     let ss = [s1, s2];
  23
  24     for ss.iter().enumerate().advance |(i, s1)| {
  25         for ss.iter().enumerate().advance |(j, s2)| {
  26             let ord = i.cmp(&j);
  27
  28             let eq = i == j;
  29             let lt = i < j;
  30             let le = i <= j;
  31             let gt = i > j;
  32             let ge = i >= j;
  33
  34             // Eq
  35             assert_eq!(*s1 == *s2, eq);
  36             assert_eq!(*s1 != *s2, !eq);
  37
  38             // TotalEq
  39             assert_eq!(s1.equals(s2), eq);
  40
  41             // Ord
  42             assert_eq!(*s1 < *s2, lt);
  43             assert_eq!(*s1 > *s2, gt);
  44
  45             assert_eq!(*s1 <= *s2, le);
  46             assert_eq!(*s1 >= *s2, ge);
  47
  48             // TotalOrd
  49             assert_eq!(s1.cmp(s2), ord);
  50         }
  51     }
  52 }