Question

I cannot find any good documentation on how to use a range in conjunction with a container. I’m trying to insert an element into a SList using the given .insertAfter() function. It takes a range though and I have no idea how to retrieve it.

Can someone please post an example or two of how to use this poorly documented feature?

This is the D documentation for containers – http://dlang.org/phobos/std_container.html

I’ve also read ranges can be used like c++ iterators. If this is true how can I use a range in a loop?

Answer 1

use the slice operator ([])to get the range of a container

to iterate over a container you can do:

foreach(el;container[]){

}

a range has a front property which is the element currently pointed at, the popFront of a range will move the range to the next element and empty will indicate whether the range is at the end

the foreach loop above is equivalent to

for(auto range=container[];!range.empty;range.popFront()){
    auto el = range.front;

}

to insert into the middle of the list you’ll need to do

container.insertAfter(take(container[],5),element);

to insert at the end it’s

container.insertAfter(container[],element);