45 lines
876 B
Markdown
45 lines
876 B
Markdown
# unicode-xid
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Determine if a `char` is a valid identifier for a parser and/or lexer according to
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[Unicode Standard Annex #31](http://www.unicode.org/reports/tr31/) rules.
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[](https://travis-ci.org/unicode-rs/unicode-xid)
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[Documentation](https://unicode-rs.github.io/unicode-xid/unicode_xid/index.html)
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```rust
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extern crate unicode_xid;
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use unicode_xid::UnicodeXID;
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fn main() {
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let ch = 'a';
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println!("Is {} a valid start of an identifier? {}", ch, UnicodeXID::is_xid_start(ch));
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}
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```
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# features
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unicode-xid supports a `no_std` feature. This eliminates dependence
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on std, and instead uses equivalent functions from core.
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# changelog
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## 0.2.2
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- Add an ASCII fast-path
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## 0.2.1
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- Update to Unicode 13.0.0
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- Speed up lookup
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## 0.2.0
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- Update to Unicode 12.1.0.
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## 0.1.0
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- Initial release.
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