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tinmop/src/tour-mode-parser.lisp

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Common Lisp
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;; tinmop: an humble gemini and pleroma client
;; Copyright (C) 2021 cage
;; This program 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.
;; This program 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 this program.
;; If not, see [[http://www.gnu.org/licenses/][http://www.gnu.org/licenses/]].
(in-package :tour-mode-parser)
(define-constant +-separator+ "/" :test #'string=)
(defrule digit (character-ranges (#\0 #\9))
(:text t))
(defrule range-delimter #\-)
(defrule list-delimiter (+ (or #\Space #\,)))
(defrule number (and digit (* digit))
(:text t)
(:function parse-integer))
(defstruct range from to)
(defrule range (and number range-delimter number)
(:function (lambda (a) (make-range :from (first a) :to (third a)))))
(defrule tour-tail (? (and list-delimiter tour))
(:function rest))
(defrule tour (and (or range number) tour-tail)
(:function flatten))
(defun parse-tour-mode (data)
(parse 'tour data))