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Dec-expo

Make-dec-expo

Basic constructor macro for dec-expo structures.

Syntax

(make-dec-expo [:prefix <prefix>] 
               [:sign? <sign?>] 
               [:digits <digits>])

This is the usual way to construct dec-expo structures. It simply conses together a structure with the specified fields.

This macro generates a new dec-expo structure from scratch. See also change-dec-expo, which can "change" an existing structure, instead.

Definition

This is an ordinary make- macro introduced by fty::defprod.

Macro: make-dec-expo

(defmacro make-dec-expo (&rest args)
  (std::make-aggregate 'dec-expo
                       args '((:prefix) (:sign?) (:digits))
                       'make-dec-expo
                       nil))

Function: dec-expo

(defun dec-expo (prefix sign? digits)
  (declare (xargs :guard (and (dec-expo-prefixp prefix)
                              (sign-optionp sign?)
                              (dec-digit-char-listp digits))))
  (declare (xargs :guard t))
  (let ((__function__ 'dec-expo))
    (declare (ignorable __function__))
    (b* ((prefix (mbe :logic (dec-expo-prefix-fix prefix)
                      :exec prefix))
         (sign? (mbe :logic (sign-option-fix sign?)
                     :exec sign?))
         (digits (mbe :logic (str::dec-digit-char-list-fix digits)
                      :exec digits)))
      (list (cons 'prefix prefix)
            (cons 'sign? sign?)
            (cons 'digits digits)))))