| 1 | ;; Copyright (C) 2015 |
| 2 | ;; "Mu Lei" known as "NalaGinrut" <NalaGinrut@gmail.com> |
| 3 | ;; This file is free software: you can redistribute it and/or modify |
| 4 | ;; it under the terms of the GNU General Public License as published by |
| 5 | ;; the Free Software Foundation, either version 3 of the License, or |
| 6 | ;; (at your option) any later version. |
| 7 | |
| 8 | ;; This file is distributed in the hope that it will be useful, |
| 9 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | ;; GNU General Public License for more details. |
| 12 | |
| 13 | ;; You should have received a copy of the GNU General Public License |
| 14 | ;; along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 15 | |
| 16 | (import (readline) (reader) (printer)) |
| 17 | |
| 18 | (define (READ str) |
| 19 | (read_str str)) |
| 20 | |
| 21 | (define (EVAL ast env) ast) |
| 22 | |
| 23 | (define (PRINT exp) |
| 24 | (and (not (eof-object? exp)) |
| 25 | (format #t "~a~%" (pr_str exp #t)))) |
| 26 | |
| 27 | (define (LOOP continue?) |
| 28 | (and continue? (REPL))) |
| 29 | |
| 30 | (define (REPL) |
| 31 | (LOOP |
| 32 | (let ((line (_readline "user> "))) |
| 33 | (cond |
| 34 | ((eof-object? line) #f) |
| 35 | ((string=? line "") #t) |
| 36 | (else |
| 37 | (catch 'mal-error |
| 38 | (lambda () (PRINT (EVAL (READ line) '()))) |
| 39 | (lambda (k . e) |
| 40 | (format #t "Error: ~a~%" (pr_str (car e) #t))))))))) |
| 41 | |
| 42 | (REPL) |