Any chance to call Tango as Extended Standard Library

[Michel Fortin]

On 2009-01-19 18:11:15 -0500, Sergey Gromov <snake.scaly at gmail.com> said:

> I think "can't" is a bit strong a statement.  Let's see:
> 
> With opApply:
> 
> class progressUpdater(Collection)
> {
>   this(Collection c)
>   {
>     collection_ = c;
>   }
> 
>   int opApply(int delegate(ref ElementType!(Collection)) dg)
>   {
>     composed_ = dg;
>     return collection_.opApply(&fancifier);
>   }
> 
>   private:
> 
>   int fancifier(ref ElementType!(Collection) el)
>   {
>     globalOnProgress();
>     return composed_(el);
>   }
> 
>   Collection collection_;
>   int delegate(ref ElementType!(Collection)) composed_;
> }

I think it's the same as this:


class progressUpdater(Collection)
{
  this(Collection c)
  {
    collection_ = c;
  }

  int opApply(int delegate(ref ElementType!(Collection)) dg)
  {
    int fancifier(ref ElementType!(Collection) el)
    {
      globalOnProgress();
      return composed_(el);
    }

    composed_ = dg;
    return collection_.opApply(&fancifier);
  }

  private:

  Collection collection_;
}


Or this:


class progressUpdater(Collection)
{
  this(Collection c)
  {
    collection_ = c;
  }

  int opApply(int delegate(ref ElementType!(Collection)) dg)
  {
	foreach(ref ElementType!(Collection) el; collection_)
    {
      globalOnProgress();
      if (dg(el))
        return 1;
    }
    return 0;
  }

  private:

  Collection collection_;
}


-- 
Michel Fortin
michel.fortin at michelf.com
http://michelf.com/