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• Parser

Cst2ast-literal-kind

Given a tree under :nonleaf literal, return the appropriate literal AST node.

Signature

(cst2ast-literal-kind tree) → ast-node?

Arguments

tree — Guard (abnf::treep tree).

Returns

ast-node? — Type (literal-optionp ast-node?).

Definitions and Theorems

Function: cst2ast-literal-kind

(defun cst2ast-literal-kind (tree)
  (declare (xargs :guard (abnf::treep tree)))
  (let ((__function__ 'cst2ast-literal-kind))
    (declare (ignorable __function__))
    (b* (((unless (abnf::tree-case tree :nonleaf))
          nil)
         (rulename-option (abnf::tree-nonleaf->rulename? tree))
         ((unless (abnf::rulenamep rulename-option))
          nil)
         (rulestring (abnf::rulename->get rulename-option)))
      (cond ((equal rulestring "decimal-number")
             (cst2ast-decimal-number tree))
            ((equal rulestring "hex-number")
             (cst2ast-hex-number tree))
            ((equal rulestring "boolean")
             (cst2ast-boolean tree))
            ((equal rulestring "string-literal")
             (cst2ast-string-literal tree))
            ((equal rulestring "hex-string")
             (cst2ast-hex-string tree))
            (t nil)))))

Theorem: literal-optionp-of-cst2ast-literal-kind

(defthm literal-optionp-of-cst2ast-literal-kind
  (b* ((ast-node? (cst2ast-literal-kind tree)))
    (literal-optionp ast-node?))
  :rule-classes :rewrite)