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

(module (type-checks-numbers number)

(;export
  check-number
  check-positive-number check-non-negative-number check-natural-number
  check-negative-number check-non-positive-number)

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

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

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

(define-check-type number)
(define-check-type positive-number)
(define-check-type non-negative-number)
(define check-natural-number check-non-negative-number)
(define-check-type negative-number)
(define-check-type non-positive-number)

) ;module (type-checks-numbers number)