unicode-xid

Determine if a char is a valid identifier for a parser and/or lexer according to Unicode Standard Annex #31 rules.

extern crate unicode_xid;

use unicode_xid::UnicodeXID;

fn main() {
    let ch = 'a';
    println!("Is {} a valid start of an identifier? {}", ch, UnicodeXID::is_xid_start(ch));
}

features

unicode-xid supports a no_std feature. This eliminates dependence on std, and instead uses equivalent functions from core.

changelog

0.2.6

Update to Unicode 16.0.0.

0.2.5

Update to Unicode 15.1.0.

0.2.4

Update to Unicode 15.0.0.
Replace const tables with static tables.

0.2.3

Update to Unicode 14.0.0.

0.2.2

Add an ASCII fast-path.

0.2.1

Update to Unicode 13.0.0.
Speed up lookup.

0.2.0

Update to Unicode 12.1.0.

0.1.0

Initial release.