Bug 6130 – utf.toUTF16z needs to be callable with any string type

Currently only passing UTF8 strings works. wstrings should be supported too: wstring a = "foo"; toUTF16z(a); testwstring.d(12): Error: function std.utf.toUTF16z (in const(char[]) s) is not callable using argument types (immutable(wchar)[]) testwstring.d(12): Error: cannot implicitly convert expression (a) of type immutable(wchar)[] to const(char[])

Also, dstrings should be supported. It makes it much easier to deal with the windows api when you have access to the count of code points of a string: dstring text = "ABCDE abcde ÀÁÂÃÄÅ àáâãäå"; TextOut(hdc, 0, 0, text.toUTF16z, text.length); That won't compile and I have to do this instead: TextOut(hdc, 0, 0, to!string(text).toUTF16z, text.length);

I think this is safe to close since we now have toUTFz.

https://github.com/D-Programming-Language/phobos/pull/279 will actually do this, since it'll make to so that toUTF16z just calls toUTFz internally, in which case it's easy to make toUTF16z take any string type.