On 11/6/21 5:05 AM, Andrey Zherikov wrote:
> Some one can complain that `foo()` returns pointers that are not
> available in CTFE but remember that the real code is more complex and
> `foo()` cam be return just length (`return b.get().length;`) having the
> same result.
I think the error you got is a bug and should be reported because it
does not make sense:
Error: couldn't find field `ar` of type `A[]` in `MapResult([0LU], null)`
> Basically I have a collection of data (`A[] ar`), different addressing
> through the indexes (multiple `size_t[] idx`) and I want to manipulate
> these objects through indexes. If there is another way to achieve the
> same in CFTE, I'd like to hear.
Have you considered std.range.indexed, which should at least cover the
case of accessing:
https://dlang.org/phobos/std_range.html#indexed
For changing values, how about passing in a function pointer e.g. a
lambda? The following one takes A and returns A but you can have a
different approach where the function takes by 'ref A' and modifies its
parameter:
void set(A function(A) func) {
foreach (i; idx) {
ar[i] = func(ar[i]);
}
}
Can you give a little more context for others to come up with a better
answer?
Ali
