apply-unary-to-terms

(in-package "ACL2")

(define apply-unary-to-terms
  ((fn pseudo-termfnp) (terms pseudo-term-listp))
  :guard (or (symbolp fn) (= 1 (len (lambda-formals fn))))
  :returns (applied-terms "A @(tsee pseudo-term-listp).")
  :parents (std/system/term-transformations)
  :short "Apply a function symbol or a unary lambda expression
          to each element of a list of terms,
          obtaining a list of corresponding terms."
  (apply-unary-to-terms-aux fn terms nil)
  :verify-guards nil
  :prepwork ((define apply-unary-to-terms-aux
     ((fn pseudo-termfnp) (terms pseudo-term-listp)
       (rev-result pseudo-term-listp))
     :guard (or (symbolp fn) (= 1 (len (lambda-formals fn))))
     :returns (final-result "A @(tsee pseudo-term-listp).")
     (cond ((endp terms) (reverse rev-result))
       (t (apply-unary-to-terms-aux fn
           (cdr terms)
           (cons (apply-term* fn (car terms)) rev-result))))
     :verify-guards nil)))