mcs/class/corlib/System/Nullable.cs

   1 //
   2 // System.Nullable
   3 //
   4 // Martin Baulig (martin@ximian.com)
   5 //
   6 // (C) 2004 Novell, Inc.
   7 //
   8
   9 using System.Reflection;
  10 using System.Collections.Generic;
  11 using System.Runtime.CompilerServices;
  12
  13 #if NET_1_2
  14 namespace System
  15 {
  16         [CLSCompliant(false)]
  17         public struct Nullable<T>
  18         {
  19                 T value;
  20                 bool has_value;
  21
  22                 public Nullable (T value)
  23                 {
  24                         this.value = value;
  25                         this.has_value = true;
  26                 }
  27
  28                 public bool HasValue {
  29                         get { return has_value; }
  30                 }
  31
  32                 public T Value {
  33                         get { return value; }
  34                 }
  35
  36                 public T GetValueOrDefault ()
  37                 {
  38                         if (has_value)
  39                                 return value;
  40                         return default (T);
  41                 }
  42
  43                 public T GetValueOrDefault (T def_value)
  44                 {
  45                         if (has_value)
  46                                 return value;
  47                         else
  48                                 return def_value;
  49                 }
  50         }
  51 }
  52 #endif