use std::str::FromStr;
use ast::{self, WithLocation};

grammar;

pub Program: ast::Program = {
    Expression => ast::Program(<>),
};

Expression: Box<ast::WithLocation<ast::Expression>> = {
    Num => Box::new(<>.map(|v| ast::Expression::Number(v))),
};

Num: WithLocation<u64> = <e: Spanned<r"[0-9]+">> => e.map(|v| u64::from_str(v).unwrap());

Spanned<T>: WithLocation<T> = {
    <l: @L> <v: T> <r: @R> => WithLocation::new(v, l, r)
};