Johan Mollevik wrote:
> bearophile wrote:
>
>> Johan Mollevik:
>>
>>> x and y are the two dimensional indices into the 4x4 array
>>> block and v
>>> is the vallue at block[y][x]
>>
>> OK. Something like this?
>>
>>
>> import std.stdio, std.typecons;
>>
>> struct NaturalScan(T) {
>> T[][] data;
>> size_t r, c;
>>
>> @property bool empty() const pure nothrow {
>> return r == data.length;
>> }
>>
>> @property Tuple!(size_t, size_t, T) front()
>> const pure nothrow {
>> return typeof(return)(r, c, data[r][c]);
>> }
>>
>> void popFront() pure nothrow {
>> c = (c + 1) % data[r].length;
>> if (c == 0)
>> r++;
>> }
>> }
>>
>> NaturalScan!T naturalScan(T)(T[][] m) {
>> return typeof(return)(m);
>> }
>>
>> void main() {
>> auto mat = [[10, 20], [30, 40, 50], [60, 70]];
>> foreach (r, c, v; mat.naturalScan)
>> writefln("%d %d %d", r, c, v);
>> }
>>
>>
>> Bye,
>> bearophile
>
> That looks like it might work for 2 dimensions and as that is the use
> case I have right now I might settle for that. (and I can add more
> overloads manually if needed)
>
> The original code was genereal enough to handle any number of
> dimensions thou.
>
> Bassically this would work like this
>
> uint[][][] array=...
>
> foreach(x,v;opApplyN(array)){//using only one index (x)
> //v has type uint[][]
> }
>
>
> foreach(x,y,v;opApplyN(array)){//using two indeces (x,y)
> //v has type uint[]
> }
>
>
> foreach(x,y,z,v;opApplyN(array)){//using three index (x,y,z)
> //v has type uint
> }
>
> So if someone know anything of why I get the error on recursive
aliases
> I might try to get that working again otherwise I might try your code
> as it is enough for now
>
> Thnks for the help by the way
Hmm, your solution does not work with static arrays it seems, will se
if I can sort that out
