Calculator

Simple calculator built for educational purposes.

Run

node main.js 1 + 1

Test

npm test

Grammar

Expression <- Sum
Sum <- Product (+ | -) Product*
Product <- Value (* | /) Value*
Value <- (-)? ([0-9]+) (.[0-9]+)? 
    | (++ | --) Value
    | Value (++ | --)
    | '(' Expression ')'