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Coordinate

Coordinate-kind

Get the kind (tag) of a coordinate structure.

Signature
(coordinate-kind x) → kind
Arguments: x — Guard (coordinatep x).

Definitions and Theorems

Function: coordinate-kind$inline

(defun coordinate-kind$inline (x)
  (declare (xargs :guard (coordinatep x)))
  (let ((__function__ 'coordinate-kind))
    (declare (ignorable __function__))
    (mbe :logic (cond ((or (atom x) (eq (car x) :explicit))
                       :explicit)
                      ((eq (car x) :sign-high) :sign-high)
                      ((eq (car x) :sign-low) :sign-low)
                      (t :inferred))
         :exec (car x))))

Theorem: coordinate-kind-possibilities

(defthm coordinate-kind-possibilities
  (or (equal (coordinate-kind x) :explicit)
      (equal (coordinate-kind x) :sign-high)
      (equal (coordinate-kind x) :sign-low)
      (equal (coordinate-kind x) :inferred))
  :rule-classes
  ((:forward-chaining :trigger-terms ((coordinate-kind x)))))