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  1. using System;
  2. using System.Linq;
  3. using System.Linq.Expressions;
  4.  
  5. public class Test {
  6.  
  7. class Tst {
  8.     public int a;
  9.     public int b;
  10.     public int c;
  11. }
  12.  
  13. public static Func<T,object[]> MakeFieldGetter<T>() {
  14.     var arg = Expression.Parameter(typeof(T), "arg");
  15.     var body = Expression.NewArrayInit(
  16.         typeof(object)
  17.     ,   typeof(T).GetFields().Select(f => (Expression)Expression.Convert(Expression.Field(arg, f), typeof(object)))
  18.     );
  19.     return (Func<T,object[]>)Expression
  20.         .Lambda(typeof(Func<T,object[]>), body, arg)
  21.         .Compile();
  22. }
  23.  
  24. public static void Main() {
  25.     var tst1 = new Tst {a=1,b=2,c=3};
  26.     var tst2 = new Tst {a=5,b=7,c=9};
  27.     var getter = MakeFieldGetter<Tst>();
  28.     foreach (var f in getter(tst1)) {
  29.         Console.Write("{0} ", f);
  30.     }
  31.     Console.WriteLine();
  32.     foreach (var f in getter(tst2)) {
  33.         Console.Write("{0} ", f);
  34.     }        
  35. }
  36.  
  37.  
  38. }
Success #stdin #stdout 0.09s 34328KB
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https://ideone.com/EwxsC6
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
secret

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