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  1. using System;
  2. using Microsoft.CSharp;
  3. using System.Collections.Generic;
  4. using System.CodeDom.Compiler;
  5. using System.Diagnostics;
  6.  
  7. class Program
  8. {
  9.     static void Main(string[] args)
  10.     {
  11.         string sourceCode = "class e{static void Main(){System.Console.Write(new char[1\n#if l\n#else\n*5]{'w','o','r','l','d'\n#if o\n#else\n});\n#endif\n}\n#endif\n}";
  12.  
  13.         Console.WriteLine(isPristine(sourceCode) ? "Pristine" : "Not pristine");
  14.         Console.ReadLine();
  15.     }
  16.  
  17.     static bool isPristine(string sourceCode)
  18.     {
  19.         using (var csc = new CSharpCodeProvider(new Dictionary<string, string>() { { "CompilerVersion", "v3.5" } }))
  20.         {
  21.             var parameters = new CompilerParameters(new[] { "mscorlib.dll", "System.Core.dll" });
  22.  
  23.             int length = sourceCode.Length;
  24.             List<string> substringsThatWork = new List<string>();
  25.  
  26.             for (int i = 0; i < length; i++)
  27.             {
  28.                 for (int j = 1; j < length - i; j++)
  29.                 {
  30.                     string sourceWithRemoval = sourceCode.Remove(i, j);
  31.                     CompilerResults results = csc.CompileAssemblyFromSource(parameters, sourceWithRemoval);
  32.  
  33.                     if (results.Errors.Count == 0)
  34.                     {
  35.                         Debug.WriteLine("Still works by removing:");
  36.                         Debug.WriteLine("@{0}@ ", sourceWithRemoval);
  37.                         Debug.WriteLine("At index {0}.", i);
  38.  
  39.                         return false;
  40.                     }
  41.                 }
  42.             }
  43.         }
  44.  
  45.         return true;
  46.     }
  47. }
Time limit exceeded #stdin #stdout 5s 36600KB
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https://ideone.com/wEdB54
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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