comparator.cs

来自「JAVA 语言的函数式编程扩展」· CS 代码 · 共 41 行

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2002-2007, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |                                         **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

// $Id: Comparator.cs 11037 2007-05-15 10:46:54Z mihaylov $

namespace scala.runtime {

  using System;

  public class Comparator {
    public static bool equals(object a, object b) {
      if (a == null)
        return b == null;
      if (a.Equals(b))
        return true;
      if (a == b)
        return true;
      IConvertible aa = a as IConvertible;
      IConvertible bb = b as IConvertible;
      if (aa != null && bb != null) {
        if (a is Decimal || b is Decimal)
          return aa.ToDecimal(null) == bb.ToDecimal(null);
        if (a is Double || b is Double)
          return aa.ToDouble(null) == bb.ToDouble(null);
        if (a is Single || b is Single)
          return aa.ToSingle(null) == bb.ToSingle(null);
        if (a is Int64 || b is Int64)
          return aa.ToInt64(null) == bb.ToInt64(null);
        return aa.ToInt32(null) == bb.ToInt32(null);
      }
      return false;
    }
  }

}