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• Parser

Parse-file

Parse a file.

Signature

(parse-file input) → (mv tree next-token rest-input)

Arguments

input — Guard (abnf::tree-listp input).

Returns

tree — Type (abnf::tree-resultp tree).

next-token — Type (abnf::tree-optionp next-token).

rest-input — Type (abnf::tree-listp rest-input).

This is the top-level function that organizes a list of tokens into a CST. We get the first token (if any), and then we parse zero or more import declarations, and then we parse the program declaration, and return a file CST. If there is no error, there is no next token and no remaining input.

Definitions and Theorems

Function: parse-file

(defun parse-file (input)
  (declare (xargs :guard (abnf::tree-listp input)))
  (let ((__function__ 'parse-file))
    (declare (ignorable __function__))
    (b* (((mv token input) (parse-token input))
         ((pok import-trees)
          (parse-*-import-declaration token input))
         ((pok tree1)
          (parse-program-declaration token input)))
      (mv (abnf::make-tree-nonleaf
               :rulename? (abnf::rulename "file")
               :branches (list import-trees (list tree1)))
          nil nil))))

Theorem: tree-resultp-of-parse-file.tree

(defthm tree-resultp-of-parse-file.tree
  (b* (((mv ?tree ?next-token ?rest-input)
        (parse-file input)))
    (abnf::tree-resultp tree))
  :rule-classes :rewrite)

Theorem: tree-optionp-of-parse-file.next-token

(defthm tree-optionp-of-parse-file.next-token
  (b* (((mv ?tree ?next-token ?rest-input)
        (parse-file input)))
    (abnf::tree-optionp next-token))
  :rule-classes :rewrite)

Theorem: tree-listp-of-parse-file.rest-input

(defthm tree-listp-of-parse-file.rest-input
  (b* (((mv ?tree ?next-token ?rest-input)
        (parse-file input)))
    (abnf::tree-listp rest-input))
  :rule-classes :rewrite)

Theorem: parse-file-of-tree-list-fix-input

(defthm parse-file-of-tree-list-fix-input
  (equal (parse-file (abnf::tree-list-fix input))
         (parse-file input)))

Theorem: parse-file-tree-list-equiv-congruence-on-input

(defthm parse-file-tree-list-equiv-congruence-on-input
  (implies (abnf::tree-list-equiv input input-equiv)
           (equal (parse-file input)
                  (parse-file input-equiv)))
  :rule-classes :congruence)