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Syntax-abstraction

Abs-identifier-alt

Signature
(abs-identifier-alt tree) → id
Arguments: tree — Guard (abnf::treep tree).
Returns: id — Type (stringp id).

Definitions and Theorems

Function: abs-identifier-alt

(defun abs-identifier-alt (tree)
  (declare (xargs :guard (abnf::treep tree)))
  (declare (xargs :guard (cst-matchp tree "identifier")))
  (let ((__function__ 'abs-identifier-alt))
    (declare (ignorable __function__))
    (let ((string-or-err
               (b* (((okf (abnf::tree-list-tuple2 sub))
                     (check-tree-nonleaf-2 tree "identifier"))
                    ((okf letter-tree)
                     (check-tree-list-1 sub.1st))
                    ((okf char) (abs-letter letter-tree))
                    ((okf chars)
                     (abs-*-letter/decimaldigit/underscore sub.2nd))
                    (string (acl2::implode (cons char chars))))
                 string)))
      (b* (((when (stringp string-or-err))
            string-or-err)
           (- (er hard? 'top-level
                  "problem in abs-identifier-alt: ~x0"
                  tree)))
        ""))))

Theorem: stringp-of-abs-identifier-alt

(defthm stringp-of-abs-identifier-alt
  (b* ((id (abs-identifier-alt tree)))
    (stringp id))
  :rule-classes :rewrite)

Theorem: abs-identifier-alt-of-tree-fix-tree

(defthm abs-identifier-alt-of-tree-fix-tree
  (equal (abs-identifier-alt (abnf::tree-fix tree))
         (abs-identifier-alt tree)))

Theorem: abs-identifier-alt-tree-equiv-congruence-on-tree

(defthm abs-identifier-alt-tree-equiv-congruence-on-tree
  (implies (abnf::tree-equiv tree tree-equiv)
           (equal (abs-identifier-alt tree)
                  (abs-identifier-alt tree-equiv)))
  :rule-classes :congruence)