parser.rs

peg_file! grammar("grammar.rustpeg");
pub use self::grammar::*;

pub type AST = Vec<Stmt>;

#[derive(Debug)]
pub enum Stmt {
    If(Box<Stmt>),
    Add(Add)
}

#[derive(Debug)]
pub enum Atom {
    Blk(Box<AST>),
    Ltr(Ltr),
    Bnd(Bnd),
    Idnt(String),
}

#[derive(Debug)]
pub struct Add {
    pub left: Mul,
    pub rights: Vec<AddRight>
} 

#[derive(Debug)]
pub enum AddRight {
    Pos(Mul),
    Neg(Mul)
}

#[derive(Debug)]
pub struct Mul {
    pub left: Pri,
    pub rights: Vec<MulRight>
}

#[derive(Debug)]
pub enum MulRight {
    Pos(Pri),
    Neg(Pri)
}

#[derive(Debug)]
pub enum Pri {
    Add(Box<Add>),
    Atom(Atom)
}

#[derive(Debug)]
pub enum Ltr {
    Num(f64),
    Str(String)
}

pub type Bnd = (String, Box<Stmt>);