tests/gtest-065.cs

   1 //-- ex-gen-type-parameter-in-constraint
   2
   3 using System;
   4 using System.Collections.Generic;
   5
   6 // A constraint may involve type parameters
   7 // A type may have multiple constraints
   8
   9 struct ComparablePair<T,U> : IComparable<ComparablePair<T,U>>
  10   where T : IComparable<T>
  11   where U : IComparable<U> {
  12   public readonly T Fst;
  13   public readonly U Snd;
  14
  15   public ComparablePair(T fst, U snd) {
  16     Fst = fst; Snd = snd;
  17   }
  18
  19   // Lexicographic ordering
  20   public int CompareTo(ComparablePair<T,U> that) {
  21     int firstCmp = this.Fst.CompareTo(that.Fst);
  22     return firstCmp != 0 ? firstCmp : this.Snd.CompareTo(that.Snd);
  23   }
  24
  25   public bool Equals(ComparablePair<T,U> that) {
  26     return this.Fst.Equals(that.Fst) && this.Snd.Equals(that.Snd);
  27   }
  28
  29   public override String ToString() {
  30     return "(" + Fst + ", " + Snd + ")";
  31   }
  32 }
  33
  34 // Sorting soccer world champions by country and year
  35
  36 class MyTest {
  37         static void Test ()
  38         {
  39                 new ComparablePair<string,int>("Brazil", 2002);
  40         }
  41
  42   public static void Main(string[] args) {
  43     List<ComparablePair<string,int>> lst
  44       = new List<ComparablePair<string,int>>();
  45     lst.Add(new ComparablePair<String,int>("Brazil", 2002));
  46     lst.Add(new ComparablePair<String,int>("Italy", 1982));
  47     lst.Add(new ComparablePair<String,int>("Argentina", 1978 ));
  48     lst.Add(new ComparablePair<String,int>("Argentina", 1986 ));
  49     lst.Add(new ComparablePair<String,int>("Germany", 1990));
  50     lst.Add(new ComparablePair<String,int>("Brazil", 1994));
  51     lst.Add(new ComparablePair<String,int>("France", 1998));
  52     // lst.Sort();
  53     foreach (ComparablePair<String,int> pair in lst)
  54       Console.WriteLine(pair);
  55   }
  56 }