The Case For Autodecode

[ag0aep6g via Digitalmars-d]

On 06/03/2016 08:36 PM, Steven Schveighoffer wrote:
> but a direct cast
> of the bits from char does NOT mean the same thing as a dchar.

That gives me an idea. A bitwise reinterpretation of int to float is 
nonsensical, too. Yet int implicitly converts to float and (for small 
values) preserves the meaning. I mean, implicit conversion doesn't have 
to mean bitwise reinterpretation.

How about replacing non-standalone code units with replacement character 
(U+FFFD) in implicit widening conversions?

For example:

----
char c = "ö"[0];
wchar w = c;
assert(w == '\uFFFD');
----

Would probably just be band-aid, though.