jayce

jayce is a tokenizer 🌌

Example

use jayce::{duos, Tokenizer};
use regex::Regex;

const SOURCE: &str = "Excalibur = 5000$; // Your own language!";

lazy_static::lazy_static! (
    static ref DUOS: Vec<(&'static str, Regex)> = duos![
        "whitespace", r"^[^\S\n]+",
        "comment_line", r"^//(.*)",
        "comment_block", r"^/\*(.|\n)*?\*/",
        "newline", r"^\n",

        "price", r"^[0-9]+\$",
        "semicolon", r"^;",
        "operator", r"^=",
        "name", r"^[a-zA-Z_]+"
    ];
);

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut tokenizer = Tokenizer::new(SOURCE, &DUOS);

    while let Some(token) = tokenizer.next()? {
        println!("{:?}", token);
    }

    Ok(())
}

Result

Token { kind: "name", value: "Excalibur", pos: (1, 1) }
Token { kind: "whitespace", value: " ", pos: (1, 10) }
Token { kind: "operator", value: "=", pos: (1, 11) }
Token { kind: "whitespace", value: " ", pos: (1, 12) }
Token { kind: "price", value: "5000$", pos: (1, 13) }
Token { kind: "semicolon", value: ";", pos: (1, 18) }
Token { kind: "whitespace", value: " ", pos: (1, 19) }
Token { kind: "comment_line", value: "// Your own language!", pos: (1, 20) }

Info

next possible Result

1. Ok(Some(token)) Match is found
2. Ok(None) End of source
3. Err(error) An error occurs

tokenize_all possible Result

1. Ok(Vec<Tokens>) Tokens are found
2. Err(error) An error occurs

Performances

initialization in 1.83 nanoseconds

tokenization of 29 639 tokens in 4.6 milliseconds

7.0.2 is 442% faster than version 4.0.1 from making everything precompiled

9.0.0 is 30% slower than version 8.1.0 to support custom whitespaces & comments