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Command

Commandp

Recognizer for command structures.

Signature
(commandp x) → *

Definitions and Theorems

Function: commandp

(defun commandp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'commandp))
    (declare (ignorable __function__))
    (and (consp x)
         (cond ((or (atom x) (eq (car x) :increment))
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 3)
                     (b* ((map (std::da-nth 0 (cdr x)))
                          (key (std::da-nth 1 (cdr x)))
                          (value (std::da-nth 2 (cdr x))))
                       (and (identifierp map)
                            (operandp key)
                            (operandp value)))))
               ((eq (car x) :decrement)
                (and (true-listp (cdr x))
                     (eql (len (cdr x)) 3)
                     (b* ((map (std::da-nth 0 (cdr x)))
                          (key (std::da-nth 1 (cdr x)))
                          (value (std::da-nth 2 (cdr x))))
                       (and (identifierp map)
                            (operandp key)
                            (operandp value)))))
               (t (and (eq (car x) :instruction)
                       (and (true-listp (cdr x))
                            (eql (len (cdr x)) 1))
                       (b* ((get (std::da-nth 0 (cdr x))))
                         (instructionp get))))))))

Theorem: consp-when-commandp

(defthm consp-when-commandp
  (implies (commandp x) (consp x))
  :rule-classes :compound-recognizer)