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Tterm-constant

Tterm-constant->value

Get the value field from a tterm-constant.

Signature
(tterm-constant->value x) → value
Arguments: x — Guard (ttermp x).
Returns: value — Type (valuep value).

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

Definitions and Theorems

Function: tterm-constant->value$inline

(defun tterm-constant->value$inline (x)
  (declare (xargs :guard (ttermp x)))
  (declare (xargs :guard (equal (tterm-kind x) :constant)))
  (let ((__function__ 'tterm-constant->value))
    (declare (ignorable __function__))
    (mbe :logic
         (b* ((x (and (equal (tterm-kind x) :constant)
                      x)))
           (value-fix (std::da-nth 0 (cdr x))))
         :exec (std::da-nth 0 (cdr x)))))

Theorem: valuep-of-tterm-constant->value

(defthm valuep-of-tterm-constant->value
  (b* ((value (tterm-constant->value$inline x)))
    (valuep value))
  :rule-classes :rewrite)

Theorem: tterm-constant->value$inline-of-tterm-fix-x

(defthm tterm-constant->value$inline-of-tterm-fix-x
  (equal (tterm-constant->value$inline (tterm-fix x))
         (tterm-constant->value$inline x)))

Theorem: tterm-constant->value$inline-tterm-equiv-congruence-on-x

(defthm tterm-constant->value$inline-tterm-equiv-congruence-on-x
  (implies (tterm-equiv x x-equiv)
           (equal (tterm-constant->value$inline x)
                  (tterm-constant->value$inline x-equiv)))
  :rule-classes :congruence)

Theorem: tterm-constant->value-when-wrong-kind

(defthm tterm-constant->value-when-wrong-kind
  (implies (not (equal (tterm-kind x) :constant))
           (equal (tterm-constant->value x)
                  (value-fix nil))))