Thanks for your explications!
On Friday, 19 May 2023 at 21:18:28 UTC, Ali Çehreli wrote:
[...]
- std.range.zip can be used instead but it does not provide
'ref' access to its elements.
How/why does sort [1] work with zipped arrays?
[...]
The following amap example there may be useful for your case
but I could not make the types work:
Do you mean using the function pointer does not work?
// Same thing, but explicitly allocate an array
// to return the results in. The element type
// of the array may be either the exact type
// returned by functions or an implicit conversion
// target.
auto squareRoots = new float[numbers.length];
taskPool.amap!sqrt(numbers, squareRoots);
This even seems to work with a static function pointer:
int main ()
{
import std.stdio;
import std.math;
import std.parallelism;
const double [] a = [1., 2., 3., 4.];
double [] b = [0., 0., 0., 0.];
writeln (a);
writeln (b);
double function (double) fp = &sqrt;
taskPool.amap!fp (a, b);
writeln (a);
writeln (b);
return 0;
}
Using an automatic variable gives a deprecation warning
main.amap!(const(double)[], double[]).amap` function requires a
dual-context, which is deprecated
[1] https://dlang.org/library/std/range/zip.html
