36 lines
1.2 KiB
Scheme
36 lines
1.2 KiB
Scheme
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;;;; type-checks-numbers.bignum.scm -*- Scheme -*-
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;;;; Kon Lovett, Jun '18
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(module (type-checks-numbers bignum)
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(;export
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check-bignum
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check-positive-bignum check-non-negative-bignum check-negative-bignum
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check-non-positive-bignum)
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(import scheme)
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(import (chicken base))
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(import (chicken module))
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(import (chicken type))
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(import type-checks-basic)
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(import (type-errors-numbers bignum))
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(: check-bignum (* bignum #!optional * -> bignum))
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(: check-positive-bignum (* bignum #!optional * -> bignum))
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(: check-non-negative-bignum (* bignum #!optional * -> bignum ))
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(: check-negative-bignum (* bignum #!optional * -> bignum))
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(: check-non-positive-bignum (* bignum #!optional * -> bignum))
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(define (positive-bignum? x) (and (bignum? x) (positive? x)))
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(define (non-negative-bignum? x) (and (bignum? x) (or (zero? x) (positive? x))))
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(define (negative-bignum? x) (and (bignum? x) (negative? x)))
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(define (non-positive-bignum? x) (and (bignum? x) (or (zero? x) (negative? x))))
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(define-check-type bignum)
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(define-check-type positive-bignum)
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(define-check-type non-negative-bignum)
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(define-check-type negative-bignum)
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(define-check-type non-positive-bignum)
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) ;module (type-checks-numbers bignum)
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