mir_slice.elementCount

import mir.ndslice.topology : iota;
assert(iota(3, 4, 5).elementCount == 60);

import mir.ndslice.topology : pack, evertPack, iota;
auto slice = iota(3, 4, 5, 6, 7, 8);
auto p = slice.pack!2;
assert(p.elementCount == 360);
assert(p[0, 0, 0, 0].elementCount == 56);
assert(p.evertPack.elementCount == 56);