;;;; type-checks-numbers.ratnum.scm  -*- Scheme -*-
;;;; Kon Lovett, Jun '18

(module (type-checks-numbers ratnum)

(;export
  check-ratnum
  check-positive-ratnum check-non-negative-ratnum check-negative-ratnum
  check-non-positive-ratnum)

(import scheme)
(import (chicken base))
(import (chicken module))
(import (chicken type))
(import type-checks-basic)
(import (type-errors-numbers ratnum))

(: check-ratnum (* * #!optional * -> ratnum))
(: check-positive-ratnum (* * #!optional * -> ratnum))
(: check-non-negative-ratnum (* * #!optional * -> ratnum ))
(: check-negative-ratnum (* * #!optional * -> ratnum))
(: check-non-positive-ratnum (* * #!optional * -> ratnum))

(define (positive-ratnum? x) (and (ratnum? x) (positive? x)))
(define (non-negative-ratnum? x) (and (ratnum? x) (or (zero? x) (positive? x))))
(define (negative-ratnum? x) (and (ratnum? x) (negative? x)))
(define (non-positive-ratnum? x) (and (ratnum? x) (or (zero? x) (negative? x))))

(define-check-type ratnum)
(define-check-type positive-ratnum)
(define-check-type non-negative-ratnum)
(define-check-type negative-ratnum)
(define-check-type non-positive-ratnum)

) ;module (type-checks-numbers ratnum)