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mes: Support equal? with arbitrary number of arguments.

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* module/mes/base.mes (equal2?): Rename from equal?.
  (equal?): Implement.
This commit is contained in:
Jan Nieuwenhuizen 2018-01-01 23:00:01 +01:00
parent 72a4f7eba2
commit 4dfad613bf
1 changed files with 11 additions and 5 deletions
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16
module/mes/base.mes
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@ -1,7 +1,7 @@
;;; -*-scheme-*-
;;; Mes --- Maxwell Equations of Software
;;; Copyright © 2016,2017 Jan Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2016,2017,2018 Jan Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of Mes.
;;;
@ -90,17 +90,23 @@
(define (and=> value procedure) (and value (procedure value)))
(define eqv? eq?)
(define (equal? a b) ;; FIXME: only 2 arg
(define (equal2? a b)
(if (and (null? a) (null? b)) #t
(if (and (pair? a) (pair? b))
(and (equal? (car a) (car b))
(equal? (cdr a) (cdr b)))
(and (equal2? (car a) (car b))
(equal2? (cdr a) (cdr b)))
(if (and (string? a) (string? b))
(eq? (string->symbol a) (string->symbol b))
(if (and (vector? a) (vector? b))
(equal? (vector->list a) (vector->list b))
(equal2? (vector->list a) (vector->list b))
(eq? a b))))))
(define (equal? . x)
(if (or (null? x) (null? (cdr x))) #t
(if (null? (cddr x)) (equal2? (car x) (cadr x))
(and (equal2? (car x) (cadr x))
(apply equal? (cdr x))))))
(define (list? x)
(or (null? x)
(and (pair? x) (list? (cdr x)))))