Ranges

[Yigal Chripun]

bearophile wrote:
> Yigal Chripun:
> 
>> personally, I think opApply should be removed. it provides "push" style iteration which should be provided as a "each" method of the container. the "pull" style of ranges should be used with client side looping.<
> 
> I don't understand what do you mean. Can you show me how you would like to replace the purpose of opApply, maybe with an example?
> 
> Bye,
> bearophile

auto c = new Container(Type)();
..

1. Container implements iteration, "yields" items in sequence
c.each( (Type obj) { ... } );

2. client code implements iteration, pulls container for items
auto r = c.getRange(); // name isn't important, just the semantics
while (!r.empty) {
    // do stuff with current item
    if (some_external_condition) break;
}