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Expr-unary-info

Expr-unary-infop

Recognizer for expr-unary-info structures.

Signature
(expr-unary-infop x) → *

Definitions and Theorems

Function: expr-unary-infop

(defun expr-unary-infop (x)
  (declare (xargs :guard t))
  (and (mbe :logic (and (alistp x)
                        (equal (strip-cars x) '(type)))
            :exec (fty::alist-with-carsp x '(type)))
       (b* ((type (cdr (std::da-nth 0 x))))
         (typep type))))

Theorem: consp-when-expr-unary-infop

(defthm consp-when-expr-unary-infop
  (implies (expr-unary-infop x) (consp x))
  :rule-classes :compound-recognizer)