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(in-package #:monparser)
(defparameter whitespace
(many (unit #'char:whitespace?)))
(defparameter end-of-input
(lambda (input)
(if (cursed:has-data? input)
(make-failure :place input :message "Didn't reach end of input.")
(make-parsing :tree nil :start input :end input))))
(defun repeat (p min &optional (max 0))
(if (> min 0)
(comp ((x p)
(xs (repeat p (1- min) (1- max))))
(cons x xs))
(if (> max 0)
(comp ((x (optional p))
(xs (repeat p 0 (if x (1- max) 0))))
(if x (cons x xs) x))
nothing)))
(defmacro literal (word)
(when (not (stringp word))
(error "Literal only accepts strings as input."))
(let ((binding-list '())
(name-list '()))
(loop :for c :across word :do
(when c
(let ((name (gensym)))
(push name name-list)
(push `(,name (unit ,c)) binding-list))))
`(comp ,(reverse binding-list)
,(cons 'list (reverse name-list)))))
(defmacro within (left p right)
`(comp ((_ ,left)
(cell ,p)
(_ ,right))
cell))
(defmacro interlinked (p separator)
`(many (comp ((cell ,p)
(_ (optional ,separator)))
cell)))
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