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Gin->ienv

Get the ienv field from a gin.

Signature
(gin->ienv x) → ienv
Arguments: x — Guard (ginp x).
Returns: ienv — Type (c$::ienvp ienv).

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

Definitions and Theorems

Function: gin->ienv$inline

(defun gin->ienv$inline (x)
  (declare (xargs :guard (ginp x)))
  (declare (xargs :guard t))
  (let ((__function__ 'gin->ienv))
    (declare (ignorable __function__))
    (mbe :logic
         (b* ((x (and t x)))
           (c$::ienv-fix (cdr (std::da-nth 0 x))))
         :exec (cdr (std::da-nth 0 x)))))

Theorem: ienvp-of-gin->ienv

(defthm ienvp-of-gin->ienv
  (b* ((ienv (gin->ienv$inline x)))
    (c$::ienvp ienv))
  :rule-classes :rewrite)

Theorem: gin->ienv$inline-of-gin-fix-x

(defthm gin->ienv$inline-of-gin-fix-x
  (equal (gin->ienv$inline (gin-fix x))
         (gin->ienv$inline x)))

Theorem: gin->ienv$inline-gin-equiv-congruence-on-x

(defthm gin->ienv$inline-gin-equiv-congruence-on-x
  (implies (gin-equiv x x-equiv)
           (equal (gin->ienv$inline x)
                  (gin->ienv$inline x-equiv)))
  :rule-classes :congruence)