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• Error-checking

Ensure-function/lambda-guard-verified-fns

Cause an error if a function or lambda expression is a non-guard-verified function or a lambda expression that calls some non-guard-verified function.

Signature

(ensure-function/lambda-guard-verified-fns 
     fn/lambda description 
     error-erp error-val ctx state) 
 
  → 
(mv erp val state)

Arguments

fn/lambda — Function or lambda expression to check.
    Guard (pseudo-termfnp fn/lambda).

description — Guard (msgp description).

error-erp — Flag to return in case of error.

error-val — Value to return in case of error.

ctx — Context for errors.

Returns

erp — Type (implies erp (equal erp error-erp)).

val — Type (and (implies erp (equal val error-val)) (implies (and (not erp) error-erp) (not val))) .

This error-checking function is useful after calling ensure-function/macro/lambda (which returns the pseudo-termfnp) to handle functions and lambda expressions uniformly. The description parameter should describe the function or lambda expression.

Definitions and Theorems

Function: ensure-function/lambda-guard-verified-fns

(defun ensure-function/lambda-guard-verified-fns
       (fn/lambda description
                  error-erp error-val ctx state)
  (declare (xargs :stobjs (state)))
  (declare (xargs :guard (and (pseudo-termfnp fn/lambda)
                              (msgp description))))
  (let ((__function__ 'ensure-function/lambda-guard-verified-fns))
    (declare (ignorable __function__))
    (if (symbolp fn/lambda)
        (ensure-function-is-guard-verified$
             fn/lambda
             description error-erp error-val)
      (ensure-lambda-guard-verified-fns$
           fn/lambda
           description error-erp error-val))))

Theorem: return-type-of-ensure-function/lambda-guard-verified-fns.erp

(defthm return-type-of-ensure-function/lambda-guard-verified-fns.erp
  (b* (((mv ?erp ?val ?state)
        (ensure-function/lambda-guard-verified-fns
             fn/lambda description
             error-erp error-val ctx state)))
    (implies erp (equal erp error-erp)))
  :rule-classes :rewrite)

Theorem: return-type-of-ensure-function/lambda-guard-verified-fns.val

(defthm return-type-of-ensure-function/lambda-guard-verified-fns.val
  (b* (((mv ?erp ?val ?state)
        (ensure-function/lambda-guard-verified-fns
             fn/lambda description
             error-erp error-val ctx state)))
    (and (implies erp (equal val error-val))
         (implies (and (not erp) error-erp)
                  (not val))))
  :rule-classes :rewrite)

Subtopics

Ensure-function/lambda-guard-verified-fns$

Call ensure-function/lambda-guard-verified-fns with ctx and state as the last two arguments.