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/*
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Copyright (c) 2003-2008 Niels Kokholm and Peter Sestoft
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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// C5 example: Comparer patterns
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// Compile with
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// csc /r:C5.dll ComparerPatterns.cs
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using System;
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using C5;
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using SCG = System.Collections.Generic;
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class MyTest {
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public static void Main(String[] args) {
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SCG.IComparer<Rec<string,int>> lexico1 = new Lexico();
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SCG.IComparer<Rec<string,int>> lexico2 =
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new DelegateComparer<Rec<string,int>>(
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delegate(Rec<string,int> item1, Rec<string,int> item2) {
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int major = item1.X1.CompareTo(item2.X1);
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return major != 0 ? major : item1.X2.CompareTo(item2.X2);
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});
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Rec<String,int> r1 = new Rec<String,int>("Carsten", 1962);
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Rec<String,int> r2 = new Rec<String,int>("Carsten", 1964);
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Rec<String,int> r3 = new Rec<String,int>("Christian", 1932);
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Console.WriteLine(lexico1.Compare(r1, r1) == 0);
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Console.WriteLine(lexico1.Compare(r1, r2) < 0);
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Console.WriteLine(lexico1.Compare(r2, r3) < 0);
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Console.WriteLine(lexico2.Compare(r1, r1) == 0);
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Console.WriteLine(lexico2.Compare(r1, r2) < 0);
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Console.WriteLine(lexico2.Compare(r2, r3) < 0);
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SCG.IComparer<String> rev
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= ReverseComparer<String>(Comparer<String>.Default);
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Console.WriteLine(rev.Compare("A", "A") == 0);
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Console.WriteLine(rev.Compare("A", "B") > 0);
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Console.WriteLine(rev.Compare("B", "A") < 0);
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}
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class Lexico : SCG.IComparer<Rec<String,int>> {
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public int Compare(Rec<String,int> item1, Rec<String,int> item2) {
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int major = item1.X1.CompareTo(item2.X1);
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return major != 0 ? major : item1.X2.CompareTo(item2.X2);
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}
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}
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class Lexico3 : SCG.IComparer<Rec<String,int,double>> {
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public int Compare(Rec<String,int,double> item1, Rec<String,int,double> item2) {
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int major1 = item1.X1.CompareTo(item2.X1);
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int major2 = major1 != 0 ? major1 : item1.X2.CompareTo(item2.X2);
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return major2 != 0 ? major2 : item1.X2.CompareTo(item2.X2);
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}
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}
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public static SCG.IComparer<T> ReverseComparer<T>(SCG.IComparer<T> cmp) {
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return new DelegateComparer<T>(
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delegate(T item1, T item2) { return cmp.Compare(item2, item1); });
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}
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}
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