use logos::Logos;

#[derive(Logos, Debug, PartialEq)]
#[logos(skip r"[\s]+")]
pub enum Token<'a> {
    #[regex("[\\w]+", |lex| lex.slice())]
    Word(&'a str),
    #[regex("[\\d]+", priority = 2, callback = |lex| lex.slice().parse::<i64>().unwrap())]
    IntLiteral(i64),
    #[regex("[\\d]+.[\\d]+", |lex| lex.slice().parse::<f64>().unwrap())]
    FloatLiteral(f64),
    #[regex(r#""([^"\\]|\\["\\bnfrt]|u[a-fA-F0-9]{4})*""#, |lex| lex.slice().to_owned())]
    StringLiteral(String),
    #[token("def")]
    Define,
    #[token("type")]
    Type,
    #[token("->")]
    RightArrow,
    #[token("|")]
    Pipe,
    #[token("[")]
    BracketOpening,
    #[token("]")]
    BracketClosing,
    #[token("(")]
    ParensOpening,
    #[token(")")]
    ParensClosing,
    #[token("{")]
    BraceOpening,
    #[token("}")]
    BraceClosing,
    #[token("+")]
    Plus,
    #[token("-")]
    Minus,
    #[token("*")]
    Multiply,
    #[token("/")]
    Divide,
    #[token("%")]
    Percent,
    #[token("&")]
    Ampersand,
    #[token(":")]
    Colon,
    #[token(";")]
    Semicolon,
    #[token(".")]
    Dot,
    #[token(",")]
    Comma,
    #[token("!")]
    ExclaimationMark,
    #[token("?")]
    QuestionMark,
}