Re: Compiler doesn't see the inherited opApply in this example

[Steven Schveighoffer]

On Fri, 03 Jul 2009 17:42:45 -0400, Mike L. <sgtmuff...@myrealbox.com>  
wrote:

module test;
import std.stdio;

abstract class Parent
{
        int opApply(int delegate(ref int) dg)
        {
                int fakeDelegate(ref uint fake, ref int content)
                        { return dg(content); }
                return opApply(&fakeDelegate);
        }
        
        abstract int opApply(int delegate(ref uint, ref int) dg);
}

class Child : Parent
{

/* add this line (see  
http://www.digitalmars.com/d/2.0/function.html#function-inheritance) */
alias Parent.opApply opApply;

        override int opApply(int delegate(ref uint, ref int) dg)
        {
                uint index = 0;
                for(int content = 1; content < 6; content++)
                {
                        int result = dg(index, content);
                        if(result != 0)
                                return result;
                        index++;
                }
                return 0;
        }
}

void main()
{
        version(works)
                Parent child = new Child();
        else
                Child child = new Child();
        foreach(int content; child)
                writefln(content);
}