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Range

Make-range

Basic constructor macro for range structures.

Syntax

(make-range [:lsb <lsb>] 
            [:width <width>])

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

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

Definition

This is an ordinary make- macro introduced by defprod.

Macro: make-range

(defmacro make-range (&rest args)
  (std::make-aggregate 'range
                       args '((:lsb) (:width))
                       'make-range
                       nil))

Function: range

(defun range (lsb width)
  (declare (xargs :guard (and (natp lsb) (maybe-posp width))))
  (declare (xargs :guard t))
  (let ((__function__ 'range))
    (declare (ignorable __function__))
    (b* ((lsb (mbe :logic (nfix lsb) :exec lsb))
         (width (mbe :logic (acl2::maybe-posp-fix width)
                     :exec width)))
      (std::prod-cons lsb width))))