Re: Dimensions in compile time

[Basile B. via Digitalmars-d-learn]

On Monday, 8 February 2021 at 13:27:14 UTC, Vindex wrote:
Thanks everyone!
The solution that works for me now looks like this:


template ndim(T) {
    static if (std.traits.isArray!T) {
        static if (is(typeof(T.init[0]))) {
            alias SubArrayType = typeof(T.init[0]);
            enum ndim = ndim!SubArrayType + 1;
        }
        else enum ndim = 1;
    }
    else enum ndim = 0;
}
unittest {
    assert(ndim!(int[]) == 1);
    assert(ndim!(int[][]) == 2);
    assert(ndim!(int[4][3]) == 2);
    assert(ndim!(int[][2][]) == 3);
    assert(ndim!(string) == 1);
}

Nice. You should look at Rumbu solution too. It possibly has a 
better behavior toward the recursive expansion. Also interesting 
to learn the more advanced use of "is".