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• Parser

Parse-*-external-declaration

Parse a list of zero or more external declarations.

Signature

(parse-*-external-declaration parstate) 
  → 
(mv erp extdecls span eof-pos new-parstate)

Arguments

parstate — Guard (parstatep parstate).

Returns

extdecls — Type (ext-declon-listp extdecls).

span — Type (spanp span).

eof-pos — Type (positionp eof-pos).

new-parstate — Type (parstatep new-parstate), given (parstatep parstate).

This is called by parse-translation-unit to parse all the external declarations in a file. If successful, we return the list of external declarations.

We also return the position just past the end of the file. The latter is used for a check performed by the caller.

Definitions and Theorems

Function: parse-*-external-declaration

(defun parse-*-external-declaration (parstate)
  (declare (xargs :stobjs (parstate)))
  (declare (xargs :guard (parstatep parstate)))
  (let ((__function__ 'parse-*-external-declaration))
    (declare (ignorable __function__))
    (b* (((reterr)
          nil (irr-span)
          (irr-position)
          parstate)
         ((erp token span parstate)
          (read-token parstate))
         ((when (not token))
          (retok nil span (span->start span)
                 parstate))
         (parstate (unread-token parstate))
         ((erp extdecl first-span parstate)
          (parse-external-declaration parstate))
         ((erp extdecls last-span eof-pos parstate)
          (parse-*-external-declaration parstate)))
      (retok (cons extdecl extdecls)
             (span-join first-span last-span)
             eof-pos parstate))))

Theorem: ext-declon-listp-of-parse-*-external-declaration.extdecls

(defthm ext-declon-listp-of-parse-*-external-declaration.extdecls
  (b* (((mv acl2::?erp
            ?extdecls ?span ?eof-pos ?new-parstate)
        (parse-*-external-declaration parstate)))
    (ext-declon-listp extdecls))
  :rule-classes :rewrite)

Theorem: spanp-of-parse-*-external-declaration.span

(defthm spanp-of-parse-*-external-declaration.span
  (b* (((mv acl2::?erp
            ?extdecls ?span ?eof-pos ?new-parstate)
        (parse-*-external-declaration parstate)))
    (spanp span))
  :rule-classes :rewrite)

Theorem: positionp-of-parse-*-external-declaration.eof-pos

(defthm positionp-of-parse-*-external-declaration.eof-pos
  (b* (((mv acl2::?erp
            ?extdecls ?span ?eof-pos ?new-parstate)
        (parse-*-external-declaration parstate)))
    (positionp eof-pos))
  :rule-classes :rewrite)

Theorem: parstatep-of-parse-*-external-declaration.new-parstate

(defthm parstatep-of-parse-*-external-declaration.new-parstate
  (implies (parstatep parstate)
           (b* (((mv acl2::?erp
                     ?extdecls ?span ?eof-pos ?new-parstate)
                 (parse-*-external-declaration parstate)))
             (parstatep new-parstate)))
  :rule-classes :rewrite)

Theorem: true-listp-of-parse-*-external-declaration.extdecls

(defthm true-listp-of-parse-*-external-declaration.extdecls
  (b* (((mv acl2::?erp
            ?extdecls ?span ?eof-pos ?new-parstate)
        (parse-*-external-declaration parstate)))
    (true-listp extdecls))
  :rule-classes :type-prescription)

Theorem: parsize-of-parse-*-external-declaration-uncond

(defthm parsize-of-parse-*-external-declaration-uncond
  (b* (((mv acl2::?erp
            ?extdecls ?span ?eof-pos ?new-parstate)
        (parse-*-external-declaration parstate)))
    (<= (parsize new-parstate)
        (parsize parstate)))
  :rule-classes :linear)