src/evalw.lisp

   1 ;;; -*-  Mode: Lisp; Package: Maxima; Syntax: Common-Lisp; Base: 10 -*- ;;;;
   2 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   3 ;;;     The data in this file contains enhancements.                   ;;;;;
   4 ;;;                                                                    ;;;;;
   5 ;;;  Copyright (c) 1984,1987 by William Schelter,University of Texas   ;;;;;
   6 ;;;     All rights reserved                                            ;;;;;
   7 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   8 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   9 ;;;       (c) Copyright 1981 Massachusetts Institute of Technology       ;;;
  10 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  11
  12 (in-package :maxima)
  13
  14 (macsyma-module evalw)
  15
  16 ;;; Assuming that this will only be a top-level form, it will
  17 ;;; only be seen by MEVAL when a file is batched.
  18
  19 ;;; EVAL_WHEN(TRANSLATE,FOO(ME),BAZ())$
  20 ;;; EVAL_WHEN([LOADFILE,BATCH],INITIALIZE())$
  21
  22 ;; Gosh. Seems it was really stupid to have EVAL_WHEN for BATCH and DEMO,
  23 ;; people use it for the most random things. -gjc
  24
  25 (defmspec $eval_when (argl)
  26   (setq argl (cdr argl))
  27   (when (or (< (length argl) 2)
  28             (not (or (atom (car argl))
  29                      ($listp (car argl)))))
  30     (merror (intl:gettext "eval_when: incorrect arguments; found: ~M") (car argl)))
  31   (if (member '$batch (if ($listp (car argl))
  32                           (cdar argl)
  33                           (list (car argl))))
  34       `(($evaluated_when) ,@(mapcar #'meval (cdr argl)))
  35       '$not_evaluated_when))
  36