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Here are the different parts of UTS 39 we may wish to implement:
Needed for RFC 2457:
-
is_allowed()for the general security profile - Mixed script detection.
- A method for knowing what script(s) a string is in (Support obtaining Script_Extensions of a character #4)
- A method for checking if a string has mixed scripts
- Restriction level 4: We only need level 4, but implementing all of them would be nice
- We don't need to implement full mixed script confusables for rustc, we can write a more targeted heuristic
Unnecessary for Rust, but nice to have:
-
identifier_type()to return the exact categorization (Support Identifier Type #7) - IDN security profile
- Email security profile
- Mixed number detection
- Full Whole script and mixed script confusables
-
Optional DetectionOut of scope, needs CLDR
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