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Vl-evatom

Vl-evatom-p

Recognizer for vl-evatom structures.

Signature
(vl-evatom-p x) → *

Definitions and Theorems

Function: vl-evatom-p

(defun vl-evatom-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'vl-evatom-p))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :vl-evatom)
         (std::prod-consp (cdr x))
         (b* ((type (std::prod-car (cdr x)))
              (expr (std::prod-cdr (cdr x))))
           (and (vl-evatomtype-p type)
                (vl-expr-p expr))))))

Theorem: consp-when-vl-evatom-p

(defthm consp-when-vl-evatom-p
  (implies (vl-evatom-p x) (consp x))
  :rule-classes :compound-recognizer)

Subtopics

Vl-evatom-plain-p: We say a vl-evatom-p is plain when it has no posedge or negedge, and the expression is a simple identifier. For instance, an event control list like @(a or b or c) contains only plain evatoms.
Vl-evatomtype-p: Type of an item in an event control list.