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

(module (type-checks-numbers bignum)

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

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

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

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

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

) ;module (type-checks-numbers bignum)