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Check-case

Vl-collect-ieqv-strings

(vl-collect-ieqv-strings a x) returns all strings in the list x that are case-equivalent to the string a.

Signature
(vl-collect-ieqv-strings a x) → equiv-strs
Arguments: a — Guard (stringp a).; x — Guard (string-listp x).
Returns: equiv-strs — Type (string-listp equiv-strs), given (string-listp x).

This is pretty dumb, but we at least avoid downcasing a repeatedly. Linear in the length of x.

Definitions and Theorems

Function: vl-collect-ieqv-strings

(defun vl-collect-ieqv-strings (a x)
  (declare (xargs :guard (and (stringp a) (string-listp x))))
  (let ((__function__ 'vl-collect-ieqv-strings))
    (declare (ignorable __function__))
    (vl-collect-ieqv-strings-aux (str::downcase-string a)
                                 x)))

Theorem: string-listp-of-vl-collect-ieqv-strings

(defthm string-listp-of-vl-collect-ieqv-strings
  (implies (string-listp x)
           (b* ((equiv-strs (vl-collect-ieqv-strings a x)))
             (string-listp equiv-strs)))
  :rule-classes :rewrite)

Subtopics

Vl-collect-ieqv-strings-aux