;;; -*-scheme-*- ;;; Mes --- Maxwell Equations of Software ;;; Copyright © 2016,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org> ;;; ;;; This file is part of Mes. ;;; ;;; Mes is free software; you can redistribute it and/or modify it ;;; under the terms of the GNU General Public License as published by ;;; the Free Software Foundation; either version 3 of the License, or (at ;;; your option) any later version. ;;; ;;; Mes is distributed in the hope that it will be useful, but ;;; WITHOUT ANY WARRANTY; without even the implied warranty of ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;;; GNU General Public License for more details. ;;; ;;; You should have received a copy of the GNU General Public License ;;; along with Mes. If not, see <http://www.gnu.org/licenses/>. ;;; Commentary: ;;; Minimal implementation of srfi-14, for nyacc. ;;; Code: ;; FIXME: have structs (define (char-set . x) (cons '*char-set* x)) (define (char-set? x) (and (pair? x) (eq? (car x) '*char-set*))) (define (char-set= a b) (and (char-set? a) (char-set? b) (equal? a b))) (define char-set:whitespace (char-set #\tab #\page #\return #\vtab #\newline #\space)) (define (list->char-set lst) (apply char-set lst)) (define (string->char-set x . base) (apply char-set (append (string->list x) (if (null? base) '() (cdar base))))) (define (string->char-set! x base) (set-cdr! (last-pair base) (string->list x)) base) (define (char-set-contains? cs x) (and (memq x cs) #t)) (define (char-whitespace? c) (char-set-contains? char-set:whitespace c))