[Issue 18958] extern(C++) wchar, dchar mangling not correct

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18958

--- Comment #3 from Manu <turkeyman at gmail.com> ---
Actually, it looks like DMC++ *does* support char16_t/char32_t:
https://www.digitalmars.com/ctg/CPP0x-Language-Implementation.html

Just need to jig the unit-tests to make sure that's invoked somehow?

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