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Expression-unary

Expression-unary->op

Get the op field from a expression-unary.

Signature
(expression-unary->op x) → op
Arguments: x — Guard (expressionp x).
Returns: op — Type (unopp op).

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

Definitions and Theorems

Function: expression-unary->op$inline

(defun expression-unary->op$inline (x)
  (declare (xargs :guard (expressionp x)))
  (declare (xargs :guard (equal (expression-kind x) :unary)))
  (let ((__function__ 'expression-unary->op))
    (declare (ignorable __function__))
    (mbe :logic
         (b* ((x (and (equal (expression-kind x) :unary)
                      x)))
           (unop-fix (std::da-nth 0 (cdr x))))
         :exec (std::da-nth 0 (cdr x)))))

Theorem: unopp-of-expression-unary->op

(defthm unopp-of-expression-unary->op
  (b* ((op (expression-unary->op$inline x)))
    (unopp op))
  :rule-classes :rewrite)

Theorem: expression-unary->op$inline-of-expression-fix-x

(defthm expression-unary->op$inline-of-expression-fix-x
  (equal (expression-unary->op$inline (expression-fix x))
         (expression-unary->op$inline x)))

Theorem: expression-unary->op$inline-expression-equiv-congruence-on-x

(defthm expression-unary->op$inline-expression-equiv-congruence-on-x
  (implies (expression-equiv x x-equiv)
           (equal (expression-unary->op$inline x)
                  (expression-unary->op$inline x-equiv)))
  :rule-classes :congruence)

Theorem: expression-unary->op-when-wrong-kind

(defthm expression-unary->op-when-wrong-kind
  (implies (not (equal (expression-kind x) :unary))
           (equal (expression-unary->op x)
                  (unop-fix nil))))