#![crate_type = "bin"]
#![crate_name = "derive_test"]
extern crate expr;

use expr::Expr;

fn main() {
    let expr =
        Expr::add(vec![Expr::var(10, 5),
                       Expr::var(7, 3),
                       Expr::var(4, 1),
                       Expr::num(4)]);
    println!("{}", expr);
    println!("{}\n", expr.derive().simplify());


    let expr =
        Expr::exp(Expr::add(vec![Expr::var(2, 1), Expr::num(3)]), 5);
    println!("{}", expr);
    println!("{}\n", expr.derive().simplify());

    let expr =
        Expr::exp(Expr::add(vec![Expr::var(1, 3), Expr::var(2, 2),
                                 Expr::var(-1, -2)]), -7);
    println!("{}", expr);
    println!("{}\n", expr.derive().simplify());
}