1 library(unicode): Unicode string handling
All Application Manual Name SummaryHelp

Availability::- use_module(library(unicode)).(can be autoloaded)
Source[semidet]unicode_codepoint_valid(+Code)
True when Code is a non-negative integer that is a valid and assigned Unicode code point. Unassigned code points (general category Cn), surrogate halves (Cs), and integers outside‘0..0x10FFFF` all fail.