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Expression-option-some

Expression-option-some->val

Get the fty::val field from a expression-option-some.

Signature
(expression-option-some->val x) → fty::val
Arguments: x — Guard (expression-optionp x).
Returns: fty::val — Type (expressionp fty::val).

This is an ordinary field accessor created by fty::defprod.

Definitions and Theorems

Function: expression-option-some->val$inline

(defun expression-option-some->val$inline (x)
  (declare (xargs :guard (expression-optionp x)))
  (declare (xargs :guard x))
  (let ((__function__ 'expression-option-some->val))
    (declare (ignorable __function__))
    (mbe :logic (b* ((x (and x x))) (expression-fix x))
         :exec x)))

Theorem: expressionp-of-expression-option-some->val

(defthm expressionp-of-expression-option-some->val
  (b* ((fty::val (expression-option-some->val$inline x)))
    (expressionp fty::val))
  :rule-classes :rewrite)

Theorem: expression-option-some->val$inline-of-expression-option-fix-x

(defthm
      expression-option-some->val$inline-of-expression-option-fix-x
 (equal
      (expression-option-some->val$inline (expression-option-fix x))
      (expression-option-some->val$inline x)))

Theorem: expression-option-some->val$inline-expression-option-equiv-congruence-on-x

(defthm
 expression-option-some->val$inline-expression-option-equiv-congruence-on-x
 (implies (expression-option-equiv x x-equiv)
          (equal (expression-option-some->val$inline x)
                 (expression-option-some->val$inline x-equiv)))
 :rule-classes :congruence)

Theorem: expression-option-some->val-when-wrong-kind

(defthm expression-option-some->val-when-wrong-kind
  (implies (not x)
           (equal (expression-option-some->val x)
                  (expression-fix nil))))