Unicode

More generic character predicate, which reads any unicode codepoint.

Full unicode characters can be up to 24-bits, which is handled by a 32-bit number on the JVM. This predicate can be used, therefore, to handle any single unicode codepoint: this excludes multi-codepoint characters like flags, or modified emojis.

In Scala, characters can be upcast to integers, so still can be used in the description of this predicate.