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import std.stdio;
 
class Foo
{
    int b = 5;
    auto bar(int a)
    {
        return delegate() { return a + b; };
    }
}
 
void main(string[] args)
{
    auto f = new Foo;
    auto dg = f.bar(5);
 
    writeln (dg() == 10);
 
    f.b = 10;
    writeln (dg() == 15);
}

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• # 2:   hide show   clone   input   460 days 13 hours ago    Success

  result: Success     time: 0.01s    memory: 2120 kB     returned value: 0

  input:

  import std.stdio;
   
  class Foo
  {
      int b = 5;
      auto bar(int a)
      {
          return delegate() { return a + b; };
      }
  }
   
  void main(string[] args)
  {
      auto f = new Foo;
      auto dg = f.bar(5);
   
      writeln (dg() == 10);
   
      f.b = 10;
      writeln (dg() == 15);
  
      f.b = 110;
      writeln (dg() == 115);
  }

  output:

  true
  true
  
• # 1:   hide show   clone   input   460 days 14 hours ago    Success

  result: Success     time: 0.01s    memory: 2120 kB     returned value: 0

  input: no
  output:

  true
  true