This program:

```ls.d
import std.stdio;
import std.file;
void main (string [] args)
{
   auto entries = dirEntries (args[1], SpanMode.shallow, false);
   foreach (e; entries)
      writeln (e.name);
}
```

lists the contents of a directory even if args[1] and the filesystem contain names encoded in latin9 (ISO-8859-15). I wonder if this behavior can be relied on. Does this use conform to the "spirit of D" where strings are assumed to be in in UTF-8 format [1]?

Second question: Has anybody ever managed to extend std.encoding which lacks a latin9 encoding?

[1] https://dlang.org/spec/arrays.html#strings