Lockstep iteration in parallel: Error: cannot have parameter of type `void`

[Ali Çehreli]

On 5/20/23 04:21, kdevel wrote:
 > 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?

I don't know but wholesale assignment to zip's elements do transfer the 
effect, which sort does while swapping elements. However, copies of 
those range elements do not carry that effect:

import std;

void main() {
     auto a = [ 0, 1 ];
     auto z = zip(a);
     z[0] = z[1];
     writeln("worked: ", a);

     zip(a).each!(e => e = 42);
     writeln("  nope: ", a);
}

And each does not take (ref e) as a parameter at least in that  use case.

 >> 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?

I simply copied the example code bet there were mismatches between 
float, real, etc.

And I've just discovered something. Which one of the following is the 
expected documentation?

   https://dlang.org/library/std/parallelism.html

   https://dlang.org/phobos/std_parallelism.html

What paths did I take to get to those? I hope I will soon be motivated 
enough to fix such quality issues.

Ali