fork download
copy 
  1. using System;
  2. using System.Linq;
  3. using System.Linq.Expressions;
  4.  
  5. public class Test
  6. {
  7. 	public static void Main()
  8. 	{
  9.  
  10. long max = 12;
  11. int count = 2;
  12.  
  13. Expression<Func<long,int,bool>> condition;
  14.  
  15. Expression<Func<long,bool>> exp1 = x => x < max;
  16.  
  17. if (count > 0)
  18. {
  19.     Expression<Func<int,bool>> exp2 = x => x > -1;
  20.     condition = Expression.Lambda<Func<long,int,bool>>(
  21.             Expression.AndAlso(
  22.             	Expression.Invoke(exp1, exp1.Parameters)
  23.             ,   Expression.Invoke(exp2, exp2.Parameters)
  24.             )
  25.         ,   exp1.Parameters.Concat(exp2.Parameters)
  26.         );
  27. } else {
  28. 	condition = Expression.Lambda<Func<long,int,bool>>(
  29.         Expression.Invoke(exp1, exp1.Parameters)
  30.         ,   exp1.Parameters.Concat(new[]{Expression.Parameter(typeof(int))})
  31.         );
  32. }
  33. var comparator = condition.Compile();
  34.  
  35. 	}
  36. }
Success #stdin #stdout 0.16s 25472KB
comments ()
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/YsMmE8
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!