• Marcone (7/7) Oct 16 2020 How convert String to Fixed wchar Array?
• Steven Schveighoffer (19/28) Oct 16 2020 void main()

Marcone <marcone email.com> writes:

How convert String to Fixed wchar Array?

import std;

void main(){
     string name = "Marvin";
     wchar[255] wtext = name.to!(wchar[]); // Can not convert.
     writeln(wtext);
}

Steven Schveighoffer <schveiguy gmail.com> writes:

On 10/16/20 8:23 PM, Marcone wrote:
 How convert String to Fixed wchar Array?
 
 import std;
 
 void main(){
      string name = "Marvin";
      wchar[255] wtext = name.to!(wchar[]); // Can not convert.
      writeln(wtext);
 }

void main()
{
     string name = "Marvin";
     wchar[255] wtext;
     import std.range;

     wchar[] buf = wtext[];
     put(buf, name);
     auto setLen = wtext.length - buf.length; // number of wchars set in 
wtext.
     writeln(wtext[0 .. setLen]);
}

A little bit of explanation: wchar[] is an output range that can accept 
any form of text. When you use `put` on it, it writes to it, AND shrinks 
from the front to allow remembering where it was. So at the end, buf is 
pointing at what is *left* in the buffer.

There may be better ways to do this, but this way will avoid any extra 
GC allocation.

-Steve