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• Preprocessor

Vl-process-else

Handler for else directives.

Signature

(vl-process-else loc istack activep) 
  → 
(mv successp new-istack new-activep)

Arguments

loc — Guard (vl-location-p loc).

istack — Guard (vl-istack-p istack).

activep — Guard (booleanp activep).

Returns

successp — Type (booleanp successp).

new-istack — Type (vl-istack-p new-istack), given (force (vl-istack-p istack)).

new-activep — Type (booleanp new-activep), given (booleanp activep).

Definitions and Theorems

Function: vl-process-else

(defun vl-process-else (loc istack activep)
 (declare (xargs :guard (and (vl-location-p loc)
                             (vl-istack-p istack)
                             (booleanp activep))))
 (let ((__function__ 'vl-process-else))
  (declare (ignorable __function__))
  (b*
   (((when (atom istack))
     (mv
      (cw
       "Preprocessor error (~s0): found an `else, but no ~
                  ifdef/ifndef is open.~%"
       (vl-location-string loc))
      istack activep))
    ((when (vl-iframe->already-saw-elsep (car istack)))
     (mv
      (cw
       "Preprocessor error (~s0): found an `else, but we have ~
                 already seen an `else.~%"
       (vl-location-string loc))
      istack activep))
    (iframe (car istack))
    (prev-satisfiedp (vl-iframe->some-thing-satisfiedp iframe))
    (initially-activep (vl-iframe->initially-activep iframe))
    (new-activep (and initially-activep
                      (not prev-satisfiedp)))
    (new-iframe (make-vl-iframe :initially-activep initially-activep
                                :some-thing-satisfiedp t
                                :already-saw-elsep t))
    (new-istack (cons new-iframe (cdr istack))))
   (mv t new-istack new-activep))))

Theorem: booleanp-of-vl-process-else.successp

(defthm booleanp-of-vl-process-else.successp
  (b* (((mv ?successp ?new-istack ?new-activep)
        (vl-process-else loc istack activep)))
    (booleanp successp))
  :rule-classes :type-prescription)

Theorem: vl-istack-p-of-vl-process-else.new-istack

(defthm vl-istack-p-of-vl-process-else.new-istack
  (implies (force (vl-istack-p istack))
           (b* (((mv ?successp ?new-istack ?new-activep)
                 (vl-process-else loc istack activep)))
             (vl-istack-p new-istack)))
  :rule-classes :rewrite)

Theorem: booleanp-of-vl-process-else.new-activep

(defthm booleanp-of-vl-process-else.new-activep
  (implies (booleanp activep)
           (b* (((mv ?successp ?new-istack ?new-activep)
                 (vl-process-else loc istack activep)))
             (booleanp new-activep)))
  :rule-classes :type-prescription)