Ways to detect that XXXX in JSON \uXXXX does not correspond to a Unicode character?

[Doug Ewell]

"Costello, Roger L." <Costello at mitre dot org> wrote:

> Are there tools to scan a JSON document to detect the presence of
> \uXXXX, where XXXX does not correspond to any Unicode character?

A tool like this would need to scan the Unicode Character Database, for
some given version, to determine which code points have been allocated
to a coded character in that version and which have not.

--
Doug Ewell | http://ewellic.org | Thornton, CO ����