;;; Copyright 2019-2021 Christine Lemmer-Webber
;;;
;;; Licensed under the Apache License, Version 2.0 (the "License");
;;; you may not use this file except in compliance with the License.
;;; You may obtain a copy of the License at
;;;
;;;    http://www.apache.org/licenses/LICENSE-2.0
;;;
;;; Unless required by applicable law or agreed to in writing, software
;;; distributed under the License is distributed on an "AS IS" BASIS,
;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;;; See the License for the specific language governing permissions and
;;; limitations under the License.

(define-module (goblins utils assert-type)
  #:export (assert-type))

;; klugy way to assert types
(define-syntax-rule (assert-type expr pred)
  (unless (pred expr)
    (throw 'type-error (format #f "wrong type for ~s, expected ~s" 'expr 'pred))))

