/src/portable-rep.scm
Scheme | 92 lines | 47 code | 5 blank | 40 comment | 0 complexity | 5fedc46e41ba427533f30d659de2233e MD5 | raw file
- ;* Copyright 1992 Digital Equipment Corporation
- ;* All Rights Reserved
- ;*
- ;* Permission to use, copy, and modify this software and its documentation is
- ;* hereby granted only under the following terms and conditions. Both the
- ;* above copyright notice and this permission notice must appear in all copies
- ;* of the software, derivative works or modified versions, and any portions
- ;* thereof, and both notices must appear in supporting documentation.
- ;*
- ;* Users of this software agree to the terms and conditions set forth herein,
- ;* and hereby grant back to Digital a non-exclusive, unrestricted, royalty-free
- ;* right and license under any changes, enhancements or extensions made to the
- ;* core functions of the software, including but not limited to those affording
- ;* compatibility with other hardware or software environments, but excluding
- ;* applications which incorporate this software. Users further agree to use
- ;* their best efforts to return to Digital any such changes, enhancements or
- ;* extensions that they make and inform Digital of noteworthy uses of this
- ;* software. Correspondence should be provided to Digital at:
- ;*
- ;* Director, Cambridge Research Lab
- ;* Digital Equipment Corp
- ;* One Kendall Square, Bldg 700
- ;* Cambridge MA 02139
- ;*
- ;* This software may be distributed (but not offered for sale or transferred
- ;* for compensation) to third parties, provided such third parties agree to
- ;* abide by the terms and conditions of this notice.
- ;*
- ;* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
- ;* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
- ;* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
- ;* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- ;* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- ;* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- ;* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- ;* SOFTWARE.
- ; $Id: portable-rep.scm,v 1.8 1992/09/21 21:30:56 birkholz Exp $
- ;;; Just use current (user?) environment and keep a list of known module
- ;;; variables in thomas-rep-module-variables.
- (define thomas-rep-module-variables '())
- (define (empty-thomas-environment!)
- ;; Just dump thomas-rep-module-variables.
- (set! thomas-rep-module-variables '()))
- (define (thomas-rep)
- (newline)
- (display "Entering Thomas read-eval-print-loop.")
- (newline)
- (display "Exit by typing \"thomas:done\"")
- (newline)
- (dylan::catch-all-conditions
- (lambda ()
- (let loop ()
- (newline)
- (display "? ")
- (let ((input (read)))
- (newline)
- (if (and (eq? input 'thomas:done))
- 'thomas:done
- (compile-expression
- input '!MULTIPLE-VALUES thomas-rep-module-variables
- (lambda (new-vars preamble compiled-output)
- (implementation-specific:eval
- `(BEGIN
- ,@preamble
- (LET* ((!MULTIPLE-VALUES (VECTOR '()))
- (!RESULT ,compiled-output))
- (IF (EQ? !RESULT !MULTIPLE-VALUES)
- (LET RESULT-LOOP
- ((COUNT 1)
- (RESULTS (VECTOR-REF !MULTIPLE-VALUES 0)))
- (IF (PAIR? RESULTS)
- (LET ((RESULT (CAR RESULTS)))
- (NEWLINE)
- (DISPLAY ";Value[")(DISPLAY COUNT)
- (DISPLAY "]: ")(WRITE RESULT)
- (RESULT-LOOP (+ 1 COUNT) (CDR RESULTS)))
- (NEWLINE)))
- (BEGIN
- (NEWLINE)(DISPLAY ";Value: ")(WRITE !RESULT)
- (NEWLINE))))))
- (set! thomas-rep-module-variables
- (append new-vars thomas-rep-module-variables))
- (loop)))))))))
- (display "
- Apply thomas-rep to start a Thomas read-eval-print loop.
- ")