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;;; kolam --- GraphQL implementation
;;; Copyright © 2022 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of kolam.
;;;
;;; kolam is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU Affero General Public License as
;;; published by the Free Software Foundation; either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; kolam 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
;;; Affero General Public License for more details.
;;;
;;; You should have received a copy of the GNU Affero General Public
;;; License along with kolam. If not, see
;;; <http://www.gnu.org/licenses/>.
(import (srfi srfi-64))
(define token-pattern
(@@ (kolam parse) token-pattern))
(define token-value-pattern
(@@ (kolam parse) token-value-pattern))
(define optional?
(@@ (kolam parse) optional?))
(eval-when (expand load eval)
(define (macro-ref module symbol)
(macro-transformer
(module-ref (resolve-module module) symbol))))
(define-syntax pattern-many
(macro-ref '(kolam parse) 'pattern-many))
(define-syntax pattern-optional
(macro-ref '(kolam parse) 'pattern-optional))
(define-syntax pattern-and
(macro-ref '(kolam parse) 'pattern-and))
(define-syntax pattern-or
(macro-ref '(kolam parse) 'pattern-or))
(test-begin "parse")
(test-assert "pattern-and should not fail when matching an optional pattern on an empty list of tokens"
((pattern-and identity
(pattern-optional (token-pattern 'foo)))
(list)))
(test-assert "pattern-or should not fail when matching an optional pattern on an empty list of tokens"
((pattern-or identity
(pattern-optional (token-pattern 'foo)))
(list)))
(test-equal "pattern-many should return an empty list when there are no matches"
(list)
((pattern-many identity
(token-pattern 'foo))
(list (cons 'bar 1))))
(test-end "parse")
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