knave-expand 0.14.22

The reading, scoping and expansion stages of knave
Documentation 
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pub struct Syntax;

impl Syntax {
    pub const OPEN: char = '(';
    pub const CLOSE: char = ')';
    pub const QUOTE: char = '"';
    pub const COMMENT: char = ';';
    pub const ESCAPE: char = '\\';
    pub const NEWLINE: char = '\n';
    const RESERVED: [char; 4] = ['[', ']', '{', '}'];

    pub fn is_reserved(character: char) -> bool {
        Self::RESERVED.contains(&character)
    }

    pub fn starts_form(character: char) -> bool {
        [Self::OPEN, Self::QUOTE].contains(&character) || !Self::ends_atom(character)
    }

    pub fn ends_atom(character: char) -> bool {
        character.is_whitespace()
            || [Self::OPEN, Self::CLOSE, Self::QUOTE, Self::COMMENT].contains(&character)
            || Self::is_reserved(character)
    }
}