• J Anderson (35/35) Feb 12 2004 template ListT(T)
• Matthew (10/43) Feb 12 2004 I can't comment on the bug/feature issue, but I think this idiom is bad.
• Manfred Nowak (13/13) Feb 12 2004 J Anderson wrote:
• J Anderson (5/19) Feb 12 2004 Why use a proxy object at all? Nar, I know the above works but then you...

J Anderson <REMOVEanderson badmama.com.au> writes:

template ListT(T)
{
    class Proxy
    {
        this(List thelist, int i) { list = thelist; index = i;}
        ~this() { list.remove(index); }     
    private:
        List list;
        int index;
    }
   
    class List
    {
        void remove(int i)
        { 
            printf("remove %d\n", i);
            //...
        }
       
        Proxy opIndex(int i)
        {
            Proxy proxy = new Proxy(this, i);
            return proxy;
        }
    }
}


int main ( char [] [] args )
{
    ListT!(int).List test = new ListT!(int).List();
    delete test[1]; //Doesn't work (C:\Program 
Files\DIDE\Projects\test66\test66.d(52): 'test.opIndex(1)' is not an lvalue)

    return 1;
}

-- 
-Anderson: http://badmama.com.au/~anderson/

"Matthew" <matthew.hat stlsoft.dot.org> writes:

I can't comment on the bug/feature issue, but I think this idiom is bad.

This is an attempt to be consistent with the use of delete for removal of
keys from associative arrays.

Rather than try and be conformant with this syntax, why not fix it? In other
words, the use of delete with associative arrays is inconsistent and plain
wrong.

Let's have another way of doing it


"J Anderson" <REMOVEanderson badmama.com.au> wrote in message
news:c0hbba$2sk3$2 digitaldaemon.com...
 template ListT(T)
 {
     class Proxy
     {
         this(List thelist, int i) { list = thelist; index = i;}
         ~this() { list.remove(index); }
     private:
         List list;
         int index;
     }

     class List
     {
         void remove(int i)
         {
             printf("remove %d\n", i);
             //...
         }

         Proxy opIndex(int i)
         {
             Proxy proxy = new Proxy(this, i);
             return proxy;
         }
     }
 }


 int main ( char [] [] args )
 {
     ListT!(int).List test = new ListT!(int).List();
     delete test[1]; //Doesn't work (C:\Program
 Files\DIDE\Projects\test66\test66.d(52): 'test.opIndex(1)' is not an

lvalue)
     return 1;
 }

 -- 
 -Anderson: http://badmama.com.au/~anderson/

Manfred Nowak <svv1999 hotmail.com> writes:

J Anderson wrote:

| delete test[1]; //Doesn't work

Do you mean:

int main ( char [] [] args )
{
    ListT!(int).List test = new ListT!(int).List();
    ListT!(int).Proxy p;
    
    p= test[1]; 
    delete p;
    return 1;
}

So long.

J Anderson <REMOVEanderson badmama.com.au> writes:

Manfred Nowak wrote:

J Anderson wrote:

| delete test[1]; //Doesn't work

Do you mean:

int main ( char [] [] args )
{
    ListT!(int).List test = new ListT!(int).List();
    ListT!(int).Proxy p;
    
    p= test[1]; 
    delete p;
    return 1;
}

So long.
  

Why use a proxy object at all?  Nar, I know the above works but then you 
might as well write a method.

-- 
-Anderson: http://badmama.com.au/~anderson/