#lang racket/base
(require "grammar1.rkt")
(require "lexer.rkt")
(syntax->datum (parse
(tokenize-string "1 + 2 - 3")))
#lang racket/base
(require "grammar1.rkt")
(require "lexer.rkt")
(syntax->datum (parse
(tokenize-string "1 + 2 - 3")))