- unicode_restriction_level(+Text, -Level:atom) is det
- Classify Text under UTS #39 §5.2 at the most restrictive level for
which it qualifies. Level is one of:
ascii_only — every code point in U+0020..U+007E and Allowed.single_script — augmented resolved-script-set non-empty and
every code point Allowed.highly_restrictive — covered by Latin plus one of Hanb,
Jpan or Kore (UTS #39 §5.1 augmented profiles).moderately_restrictive — covered by Latin plus a single
non-Latin Recommended script (Cyrl or Grek).minimally_restrictive — every code point has Identifier_Type
in {recommended, inclusion}.unrestricted — otherwise.
A linter that walks source clauses and reports atoms with the
confusability issues above is registered in library(check) itself
(predicate list_confusable_identifiers/0); see the
library(check) documentation for details.
