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  1. using System;
  2. using System.Linq.Expressions;
  3. using System.Runtime.CompilerServices;
  4. using Microsoft.CSharp.RuntimeBinder;
  5.  
  6. namespace ConsoleApplication1
  7. {
  8. 	class TargetClass0
  9. 	{
  10. 		private void Call(int arg)
  11. 		{
  12. 			//実際呼び出されたか確認するため
  13. 			Console.WriteLine("TargetClass0 is Called value:" + arg.ToString());
  14. 		}
  15.  
  16. 		public int Value
  17. 		{
  18. 			get;
  19. 			set;
  20. 		}
  21. 	}
  22.  
  23. 	class TargetClass1
  24. 	{
  25. 		public int Value;
  26.  
  27. 		public void Call(int arg)
  28. 		{
  29. 			//実際呼び出されたか確認するため
  30. 			Console.WriteLine("TargetClass1 is Called value:" + arg.ToString());
  31. 		}
  32.  
  33. 	}
  34.  
  35. 	class Program
  36. 	{
  37. 		static void SetProperty(dynamic d,int value)
  38. 		{
  39. 			d.Value = value;
  40. 		}
  41.  
  42. 		static void InvokeDelegate(dynamic d, int value)
  43. 		{
  44. 			d(value);
  45. 		}
  46.  
  47.  
  48. 		static Expression<Action<object, int>> SetPropertyExpr()
  49. 		{
  50. 			var binder = Binder.SetMember(CSharpBinderFlags.ResultDiscarded, "Value", typeof(Program)
  51. 				, new[]{CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None,"target"),
  52. 						CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.UseCompileTimeType,"arg")});
  53.  
  54. 			var targetExpr = Expression.Parameter(typeof(object), "target");
  55. 			var paramExpr=Expression.Parameter(typeof(int),"arg");
  56.  
  57. 			var dynamicExpr = Expression.MakeDynamic(typeof(Action<CallSite, object, int>), binder, targetExpr, paramExpr);
  58.  
  59. 			return Expression.Lambda<Action<object, int>>(dynamicExpr,targetExpr, paramExpr);
  60.  
  61. 		}
  62.  
  63. 		static Expression<Func<object, int>> GetProertyExpr()
  64. 		{
  65. 			var getBinder = Binder.GetMember(CSharpBinderFlags.None, "Value", typeof(Program),
  66. 				new[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, "Target") });
  67.  
  68. 			var convBinder = Binder.Convert(CSharpBinderFlags.None, typeof(int), typeof(Program));
  69.  
  70. 			var targetExpr = Expression.Parameter(typeof(object), "target");
  71.  
  72. 			var getExpr = Expression.Dynamic(getBinder, typeof(object), targetExpr);
  73. 			var convExpr = Expression.Dynamic(convBinder, typeof(int), getExpr);
  74.  
  75. 			return Expression.Lambda<Func<object, int>>(convExpr, targetExpr);
  76. 		}
  77.  
  78.  
  79. 		static void Main(string[] args)
  80. 		{
  81.  
  82.  
  83. 			var setExpr = SetPropertyExpr();
  84. 			var setContainer_ = setExpr.Compile();
  85.  
  86. 			var getExpr = GetProertyExpr();
  87. 			var getContainer = getExpr.Compile();
  88.  
  89. 			var t0 = new TargetClass0();
  90. 			var t1 = new TargetClass1();
  91.  
  92. 			Console.WriteLine("t0's Value is " + t0.Value);
  93. 			Console.WriteLine("t1's Value is " + t1.Value);
  94.  
  95. 			Console.WriteLine();
  96. 			Console.WriteLine();
  97.  
  98. 			setContainer_(t0, 100);
  99. 			Console.WriteLine("t0's Value is " + getContainer(t0));
  100.  
  101. 			setContainer_(t1, 200);
  102. 			Console.WriteLine("t1's Value is " + getContainer(t1));
  103.  
  104.  
  105. 		}
  106. 	}
  107.  
  108.  
  109. }
  110.  
Success #stdin #stdout 0.31s 35568KB
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stdin
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Standard input is empty
stdout
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t0's Value is 0
t1's Value is 0


t0's Value is 100
t1's Value is 200
https://ideone.com/kkOIma
language:
C# (gmcs 5.20.1)
created:
3 days ago
visibility:
public

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