66 lines
2.0 KiB
Scheme
66 lines
2.0 KiB
Scheme
;;; -*-scheme-*-
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;;; Mes --- Maxwell Equations of Software
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;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of Mes.
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;;;
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;;; Mes is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; Mes is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with Mes. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; base.mes is being loaded after base-0.mes. It provides the minimal
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;;; set of scheme primitives to run lib/test.mes. It is safe to be
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;;; run by Guile.
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;;; Code:
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(define (identity x) x)
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(define-macro (or . x)
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(if (null? x) #f
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(if (null? (cdr x)) (car x)
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(list 'if (car x) (car x)
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(cons 'or (cdr x))))))
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(define-macro (and . x)
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(if (null? x) #t
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(if (null? (cdr x)) (car x)
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(list 'if (car x) (cons 'and (cdr x))
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#f))))
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(define (equal? a b) ;; FIXME: only 2 arg
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(if (and (null? a) (null? b)) #t
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(if (and (pair? a) (pair? b))
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(and (equal? (car a) (car b))
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(equal? (cdr a) (cdr b)))
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(if (and (string? a) (string? b))
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(eq? (string->symbol a) (string->symbol b))
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(if (and (vector? a) (vector? b))
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(equal? (vector->list a) (vector->list b))
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(eq? a b))))))
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(define guile? (not (pair? (current-module))))
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(define (list? x)
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(or (null? x)
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(and (pair? x) (list? (cdr x)))))
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(define (procedure? p)
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(cond ((builtin? p) #t)
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((and (pair? p) (eq? (car p) 'lambda)))
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((and (pair? p) (eq? (car p) '*closure*)))
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(#t #f)))
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