On 06/03/2016 09:09 PM, Steven Schveighoffer wrote:
Except many chars *do* properly convert. This should work:
char c = 'a';
dchar d = c;
assert(d == 'a');
Yeah, that's what I meant by "standalone code unit". Code units that on
their own represent a code point would not be touched.
As I mentioned in my earlier reply, some kind of "bounds checking" for
the conversion could be a possibility.
Hm... an interesting possiblity:
dchar _dchar_convert(char c)
{
return cast(int)cast(byte)c; // get sign extension for non-ASCII
}
So when the char's most significant bit is set, this fills the upper
bits of the dchar with 1s, right? And a set most significant bit in a
char means it's part of a multibyte sequence, while in a dchar it means
that the dchar is invalid, because they only go up to U+10FFFF. Huh. Neat.
Does it work for for char -> wchar, too?
