1# unicode-xid
2
3Determine if a `char` is a valid identifier for a parser and/or lexer according to
4[Unicode Standard Annex #31](http://www.unicode.org/reports/tr31/) rules.
5
6[![Build Status](https://img.shields.io/github/workflow/status/unicode-rs/unicode-xid/CI/master)](https://github.com/unicode-rs/unicode-xid/actions?query=branch%3Amaster)
7
8[Documentation](https://unicode-rs.github.io/unicode-xid/unicode_xid/index.html)
9
10```rust
11extern crate unicode_xid;
12
13use unicode_xid::UnicodeXID;
14
15fn main() {
16    let ch = 'a';
17    println!("Is {} a valid start of an identifier? {}", ch, UnicodeXID::is_xid_start(ch));
18}
19```
20
21# features
22
23unicode-xid supports a `no_std` feature. This eliminates dependence
24on std, and instead uses equivalent functions from core.
25
26
27# changelog
28
29## 0.2.4
30
31- Update to Unicode 15.0.0
32- Replace `const` tables with `static` tables.
33
34## 0.2.3
35
36- Update to Unicode 14.0.0
37
38## 0.2.2
39
40- Add an ASCII fast-path
41
42## 0.2.1
43
44- Update to Unicode 13.0.0
45- Speed up lookup
46
47## 0.2.0
48
49- Update to Unicode 12.1.0.
50
51## 0.1.0
52
53- Initial release.
54