Accessing non-binary Unicode properties with std.uni

[Chloé Kekoa]

The documentation of std.uni [1] says that the unicode struct 
provides sets for several binary properties. I am looking for a 
way to query non-binary properties of a character. Is that 
possible with std.uni or do I need to use a third-party library?

I am specifically interested in the East_Asian_Width property [2] 
(which has six allowed values). Trying to access 
std.uni.unicode.East_Asian_Width results in the error message:

> No unicode set by name East_Asian_Width was found.

[1]: https://dlang.org/library/std/uni.html
[2]: https://www.unicode.org/reports/tr11/tr11-38.html