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• Parse-functions-sv2012

Vl-parse-task-declaration-2012

Signature

(vl-parse-task-declaration-2012 atts &key (tokstream 'tokstream) 
                                (config 'config)) 
 
  → 
(mv errmsg? value new-tokstream)

Arguments

config — Guard (vl-loadconfig-p config).

task_declaration ::= 'task' [lifetime] task_body_declaration

task_body_declaration ::=

    [ interface_identifier '.' | class_scope ] task_identifier ';'                         ;; Variant 1
        {tf_item_declaration}
        {statement_or_null}
    'endtask' [ ':' task_identifier ]

  | [ interface_identifier '.' | class_scope ] task_identifier '(' [tf_port_list] ')' ';'  ;; Variant 2
        {block_item_declaration}
        {statement_or_null}
    'endtask' [ ':' task_identifier ]

BOZO we don't yet handle the interface_identifier/class-scope stuff but instead just expect the task name to be a regular identifier.

Definitions and Theorems

Function: vl-parse-task-declaration-2012-fn

(defun vl-parse-task-declaration-2012-fn (atts tokstream config)
 (declare (xargs :stobjs (tokstream)))
 (declare (xargs :guard (vl-loadconfig-p config)))
 (declare (ignorable config))
 (declare (xargs :guard (vl-atts-p atts)))
 (let ((__function__ 'vl-parse-task-declaration-2012))
  (declare (ignorable __function__))
  (seq
   tokstream
   (:= (vl-match-token :vl-kwd-task))
   (lifetime := (vl-maybe-parse-lifetime))
   (name := (vl-match-token :vl-idtoken))
   (when
    (vl-is-token? :vl-semi)
    (:= (vl-match))
    (items := (vl-parse-0+-tf-item-declarations))
    (body := (vl-parse-function-statements))
    (:= (vl-match-token :vl-kwd-endtask))
    (:= (vl-parse-endblock-name (vl-idtoken->name name)
                                "task/endtask"))
    (return
     (b* (((mv portdecls blockitems)
           (vl-filter-portdecl-or-blockitem-list items)))
      (list
         (vl-make-taskdecl-for-parser :name (vl-idtoken->name name)
                                      :lifetime lifetime
                                      :ports portdecls
                                      :decls blockitems
                                      :loaditems items
                                      :body body
                                      :atts atts
                                      :loc (vl-token->loc name))))))
   (:= (vl-match-token :vl-lparen))
   (unless (vl-is-token? :vl-rparen)
           (portdecls := (vl-parse-tf-port-list)))
   (:= (vl-match-token :vl-rparen))
   (:= (vl-match-token :vl-semi))
   (decls := (vl-parse-0+-block-item-declarations))
   (body := (vl-parse-function-statements))
   (:= (vl-match-token :vl-kwd-endtask))
   (:= (vl-parse-endblock-name (vl-idtoken->name name)
                               "task/endtask"))
   (return (list (vl-make-taskdecl-for-parser
                      :name (vl-idtoken->name name)
                      :lifetime lifetime
                      :ports portdecls
                      :decls decls
                      :loaditems (append portdecls decls)
                      :body body
                      :atts atts
                      :loc (vl-token->loc name)))))))

Theorem: vl-parse-task-declaration-2012-fails-gracefully

(defthm vl-parse-task-declaration-2012-fails-gracefully
  (implies (mv-nth 0 (vl-parse-task-declaration-2012 atts))
           (not (mv-nth 1
                        (vl-parse-task-declaration-2012 atts)))))

Theorem: vl-warning-p-of-vl-parse-task-declaration-2012

(defthm vl-warning-p-of-vl-parse-task-declaration-2012
  (iff (vl-warning-p (mv-nth 0
                             (vl-parse-task-declaration-2012 atts)))
       (mv-nth 0
               (vl-parse-task-declaration-2012 atts))))

Theorem: vl-parse-task-declaration-2012-result

(defthm vl-parse-task-declaration-2012-result
  (implies (and (force (vl-atts-p atts)))
           (vl-taskdecllist-p
                (mv-nth 1
                        (vl-parse-task-declaration-2012 atts)))))

Theorem: vl-parse-task-declaration-2012-true-listp

(defthm vl-parse-task-declaration-2012-true-listp
  (true-listp (mv-nth 1
                      (vl-parse-task-declaration-2012 atts)))
  :rule-classes :type-prescription)

Theorem: vl-parse-task-declaration-2012-count-strong

(defthm vl-parse-task-declaration-2012-count-strong
 (and
  (<=
     (vl-tokstream-measure
          :tokstream (mv-nth 2
                             (vl-parse-task-declaration-2012 atts)))
     (vl-tokstream-measure))
  (implies
   (not (mv-nth 0
                (vl-parse-task-declaration-2012 atts)))
   (<
     (vl-tokstream-measure
          :tokstream (mv-nth 2
                             (vl-parse-task-declaration-2012 atts)))
     (vl-tokstream-measure))))
 :rule-classes ((:rewrite) (:linear)))