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Syntax-abstraction

Abs-primary-expression

Abstract a primary-expression.

Signature
(abs-primary-expression tree) → expr-or-err
Arguments: tree — Guard (abnf::treep tree).
Returns: expr-or-err — Type (expression-resultp expr-or-err).

Definitions and Theorems

Function: abs-primary-expression

(defun abs-primary-expression (tree)
 (declare (xargs :guard (abnf::treep tree)))
 (let ((__function__ 'abs-primary-expression))
  (declare (ignorable __function__))
  (b* (((okf tree)
        (check-tree-nonleaf-1-1 tree "primary-expression"))
       ((okf rulename?)
        (check-tree-nonleaf? tree)))
   (cond
    ((equal rulename? "identifier")
     (let ((id-or-err (abs-identifier tree)))
       (if (stringp id-or-err)
           (make-expression-var :name id-or-err)
         id-or-err)))
    ((equal rulename? "integer")
     (let ((int-or-err (abs-integer tree)))
       (if (integerp int-or-err)
           (make-expression-const :value int-or-err)
         int-or-err)))
    (t
     (reserrf (list :found-subtree (tree-info-for-error tree))))))))

Theorem: expression-resultp-of-abs-primary-expression

(defthm expression-resultp-of-abs-primary-expression
  (b* ((expr-or-err (abs-primary-expression tree)))
    (expression-resultp expr-or-err))
  :rule-classes :rewrite)

Theorem: abs-primary-expression-of-tree-fix-tree

(defthm abs-primary-expression-of-tree-fix-tree
  (equal (abs-primary-expression (abnf::tree-fix tree))
         (abs-primary-expression tree)))

Theorem: abs-primary-expression-tree-equiv-congruence-on-tree

(defthm abs-primary-expression-tree-equiv-congruence-on-tree
  (implies (abnf::tree-equiv tree tree-equiv)
           (equal (abs-primary-expression tree)
                  (abs-primary-expression tree-equiv)))
  :rule-classes :congruence)