Re: Why tuples are not ranges?

[Meta via Digitalmars-d-learn]

On Thursday, 28 June 2018 at 17:00:37 UTC, Mr.Bingo wrote:

I mean, if you think about it, the memory layout of a tuple is sequential types:

T1
T2
...

So, to popFront a tuple is just changing the starting offset.

You're right; it can definitely be done.

struct TupleRange(T...)
{
        size_t index;
        Tuple!T store;

        @property length()
        {
            assert(index <= store.length);
            return store.length - index;
        }

        Algebraic!T front()
        {
            assert(length > 0);
            return typeof(return)(store[index]);
        }

        void popFront()
        {
            assert(length > 0);
            index++;
        }
}