Dimensions in compile time
Basile B.
b2.temp at gmx.com
Mon Feb 8 13:44:51 UTC 2021
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".
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