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# unicode-xid
Determine if a `char` is a valid identifier for a parser and/or lexer according to
[Unicode Standard Annex #31](https://www.unicode.org/reports/tr31/) rules.
[](https://github.com/unicode-rs/unicode-xid/actions?query=branch%3Amaster)
[Documentation](https://unicode-rs.github.io/unicode-xid/unicode_xid/index.html)
```rust
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
## 0.2.5
- 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.
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