What's D's way to do that? I need it to be mutable array of wchar because a Windows function requires that.

Alternative to go down to using pointers, which would be something like:

wchar[] w = new wchar[s.length];
memcpy(w.ptr, s.ptr, s.length);

On Saturday, 26 May 2018 at 17:12:38 UTC, Dr.No wrote:
> What's D's way to do that? I need it to be mutable array of wchar because a Windows function requires that.
>
> Alternative to go down to using pointers, which would be something like:
>
> wchar[] w = new wchar[s.length];
> memcpy(w.ptr, s.ptr, s.length);

std.conv.to has you covered for quite a lot of conversions:

import std.conv;
import std.stdio;
void main()
{
    string s = "hello world";
    wchar[] mutableUtf16 = s.to!(wchar[]);
    mutableUtf16[0] = '☃';
    // prints ☃ello world
    writeln(mutableUtf16);
}