On Mon, Jan 3, 2022 at 5:09 AM Peter Dimov via Boost <boost@lists.boost.org> wrote:
Very nice, I had similar idea in message with this link: https://godbolt.org/z/Kzs6xbo5T but just to double check: no way to make initialization work with less {} because that is a language limitation, right? I mean we could add std::initializer_list constructor but then array is no longer aggregate? In other words no way to turn this array<int, 2, 2, 3> a{{ { { 1, 2, 3 }, { 4, 5, 6 } }, { { 7, 8, 9 }, { 10, 11, 12 } } }}; into array<int, 2, 2, 3> a{ { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } }; without breaking aggregate property of array? This is what I tried: https://godbolt.org/z/MoPE8W79v IMAO although this is less friendly for people that want to just initialize md array with bunch of scalar values I think the syntax with using "last level array" is nicer... Obviously I did not think of all the edge cases so my opinion might change rapidly. One big problem I noticed is that we loose ability to group the initialization(you can see the example in godbolt), but here it is inline. array<int, 2, 2, 3> a223{ { 1, 2, 3 }, { 4, 5, 6 } , { 7, 8, 9 }, { 10, 11, 12 } }; // Unfortunately no way to group stuff with {} for more clarity // array<int, 2, 2, 3> a223_grouped{ // {{ 1, 2, 3 }, { 4, 5, 6 }} , // {{ 7, 8, 9 }, { 10, 11, 12 } } //};