The character encoding is UTF8 for sure, but what the characters are is a different...

...suffix
    {
        wchar[] suffix;  // Built in Unicode strings (utf8,utf16, utf32)
        switch(_argc)
        {
        case 0:
            suffix...

...std.stdutf;

/* UTF code units */

alias char   utf8_t; // UTF-8
alias wchar utf16_t...

...people
aren't fond of it.
version (utf8) alias mlchar char;
else version (utf16) alias...

...s a shame they weren't called utf8, utf16, and utf32 from the start. Char...

...convenient for all sorts of things. You can't do that with UTF8.

cheers
Mike

...e.g. using UCS-16 instead of UTF8 (what is the gain
here?), or having...

...can be used to distinguish between a UTF8 char and a signed 64-bit integer...

...If the file is, say ASCII or UTF8, and you need it converted to UTF16...

...it seems noone else did.

 alias  char   utf8_t;
 alias wchar  utf16_t;
 alias dchar...