Convert wchar* to wstring?

[Thalamus via Digitalmars-d-learn]

On Tuesday, 5 April 2016 at 11:26:44 UTC, Thalamus wrote:
> Thanks everyone! You've all been very helpful.

For anyone who has the same question and happens on this thread, 
I wanted to post what I finally came up with. I combined the 
information everyone in this thread gave me with what I saw in 
Phobos source for the to!string() implementation, closely 
following the latter. The important to!string() code is in the 
toImpl implementation in conv.d at line 880. The existing code 
uses strlen, but that's an ANSI function. Fortunately, D has 
wcslen available, too.

import core.stdc.stddef; // For wchar_t. This is defined 
differently for Windows vs POSIX.
import core.stdc.wchar_; // For wcslen.

wstring toWstring(wchar_t* value)
{
     return value ? cast(wstring) value[0..wcslen(wstr)].dup : 
null;
}

The Phobos code notes that this operation is unsafe, because 
there's no guarantee the string is null-terminated as it should 
be. That's definitely true. The only outcome you can be really 
sure is accurate is an access violation. :)

thanks!
Thalamus