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Soft-implementation-core

Sofunp

Recognize names of second-order functions.

Signature
(sofunp sofun wrld) → yes/no
Arguments: wrld — Guard (plist-worldp wrld).
Returns: yes/no — Type (booleanp yes/no).

Definitions and Theorems

Function: sofunp

(defun sofunp (sofun wrld)
  (declare (xargs :guard (plist-worldp wrld)))
  (let ((__function__ 'sofunp))
    (declare (ignorable __function__))
    (let ((table (table-alist 'second-order-functions
                              wrld)
))
      (and (symbolp sofun)
           (not (null (assoc-eq sofun table)))))))

Theorem: booleanp-of-sofunp

(defthm booleanp-of-sofunp
  (b* ((yes/no (sofunp sofun wrld)))
    (booleanp yes/no))
  :rule-classes :rewrite)