import std;

​

struct MyType

{

    int id;

    // [...] other stuff

}

​

void main()

{

    auto list = DList!MyType();

​

    // Fill the list.

    foreach (i; 0 .. 10)

        list.insertBack(MyType(i));

​

    // Traverse the list, conditionally remove one element.

    for (auto range = list[]; !range.empty;)

        if (range.front.id == 3)

            list.popFirstOf(range);

        else

            range.popFront();

​

    // Traverse the list, conditionally insert one element.

    for (auto range = list[]; !range.empty;)

    {

        if (range.front.id == 6)

            list.insertBefore(range, MyType(66));

        range.popFront();

    }

​

    // Print modified list.

    foreach (e; list)

        writeln(e);

​

}