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Syntax-abstraction

Abs-string-literal-element

Abstract a string-literal-element to a Leo character.

Signature
(abs-string-literal-element tree) → char
Arguments: tree — Guard (abnf::treep tree).
Returns: char — Type (char-resultp char).

Definitions and Theorems

Function: abs-string-literal-element

(defun abs-string-literal-element (tree)
 (declare (xargs :guard (abnf::treep tree)))
 (let ((__function__ 'abs-string-literal-element))
  (declare (ignorable __function__))
  (b*
    (((okf tree)
      (abnf::check-tree-nonleaf-1-1 tree "string-literal-element"))
     ((okf rulename?)
      (abnf::check-tree-nonleaf? tree)))
   (cond
    ((equal
      rulename?
      "not-double-quote-or-backslash-or-line-feed-or-carriage-return")
     (abs-not-double-quote-or-backslash-or-line-feed-or-carriage-return
          tree))
    ((equal rulename? "simple-character-escape")
     (abs-simple-character-escape tree))
    ((equal rulename? "ascii-character-escape")
     (abs-ascii-character-escape tree))
    ((equal rulename? "unicode-character-escape")
     (abs-unicode-character-escape tree))
    (t
     (reserrf
        (list :found-subtree (abnf::tree-info-for-error tree))))))))

Theorem: char-resultp-of-abs-string-literal-element

(defthm char-resultp-of-abs-string-literal-element
  (b* ((char (abs-string-literal-element tree)))
    (char-resultp char))
  :rule-classes :rewrite)

Theorem: abs-string-literal-element-of-tree-fix-tree

(defthm abs-string-literal-element-of-tree-fix-tree
  (equal (abs-string-literal-element (abnf::tree-fix tree))
         (abs-string-literal-element tree)))

Theorem: abs-string-literal-element-tree-equiv-congruence-on-tree

(defthm abs-string-literal-element-tree-equiv-congruence-on-tree
  (implies (abnf::tree-equiv tree tree-equiv)
           (equal (abs-string-literal-element tree)
                  (abs-string-literal-element tree-equiv)))
  :rule-classes :congruence)