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• Parser

Parse-label-declaration

Parse a label declaration.

Signature

(parse-label-declaration parstate) 
  → 
(mv erp idents span new-parstate)

Arguments

parstate — Guard (parstatep parstate).

Returns

idents — Type (ident-listp idents).

span — Type (spanp span).

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

This is called after the __label__ keyword has already been read, so we parse an identifier (which must be present), followed by zero or more comma-preceded identifiers.

Definitions and Theorems

Function: parse-label-declaration

(defun parse-label-declaration (parstate)
  (declare (xargs :stobjs (parstate)))
  (declare (xargs :guard (parstatep parstate)))
  (let ((__function__ 'parse-label-declaration))
    (declare (ignorable __function__))
    (b* (((reterr) nil (irr-span) parstate)
         ((erp label span parstate)
          (read-identifier parstate))
         ((erp labels & parstate)
          (parse-*-comma-identifier parstate))
         ((erp last-span parstate)
          (read-punctuator ";" parstate)))
      (retok (cons label labels)
             (span-join span last-span)
             parstate))))

Theorem: ident-listp-of-parse-label-declaration.idents

(defthm ident-listp-of-parse-label-declaration.idents
  (b* (((mv acl2::?erp ?idents ?span ?new-parstate)
        (parse-label-declaration parstate)))
    (ident-listp idents))
  :rule-classes :rewrite)

Theorem: spanp-of-parse-label-declaration.span

(defthm spanp-of-parse-label-declaration.span
  (b* (((mv acl2::?erp ?idents ?span ?new-parstate)
        (parse-label-declaration parstate)))
    (spanp span))
  :rule-classes :rewrite)

Theorem: parstatep-of-parse-label-declaration.new-parstate

(defthm parstatep-of-parse-label-declaration.new-parstate
  (implies (parstatep parstate)
           (b* (((mv acl2::?erp ?idents ?span ?new-parstate)
                 (parse-label-declaration parstate)))
             (parstatep new-parstate)))
  :rule-classes :rewrite)

Theorem: parsize-of-parse-label-declaration-uncond

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

Theorem: parsize-of-parse-label-declaration-cond

(defthm parsize-of-parse-label-declaration-cond
  (b* (((mv acl2::?erp ?idents ?span ?new-parstate)
        (parse-label-declaration parstate)))
    (implies (not erp)
             (<= (parsize new-parstate)
                 (1- (parsize parstate)))))
  :rule-classes :linear)