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Input-checking

Check-input-expression

Check an input expression.

Signature
(check-input-expression inexpr env) → type
Arguments: inexpr — Guard (input-expressionp inexpr).; env — Guard (senvp env).
Returns: type — Type (type-resultp type).

The expression must be a value expression.

Definitions and Theorems

Function: check-input-expression

(defun check-input-expression (inexpr env)
  (declare (xargs :guard (and (input-expressionp inexpr)
                              (senvp env))))
  (let ((__function__ 'check-input-expression))
    (declare (ignorable __function__))
    (b* ((expr (input-expression->get inexpr))
         ((unless (expression-valuep expr))
          (reserrf (list :not-value-expression expr)))
         ((okf etype)
          (typecheck-expression expr env)))
      (expr-type->type etype))))

Theorem: type-resultp-of-check-input-expression

(defthm type-resultp-of-check-input-expression
  (b* ((type (check-input-expression inexpr env)))
    (type-resultp type))
  :rule-classes :rewrite)

Theorem: check-input-expression-of-input-expression-fix-inexpr

(defthm check-input-expression-of-input-expression-fix-inexpr
  (equal (check-input-expression (input-expression-fix inexpr)
                                 env)
         (check-input-expression inexpr env)))

Theorem: check-input-expression-input-expression-equiv-congruence-on-inexpr

(defthm
 check-input-expression-input-expression-equiv-congruence-on-inexpr
 (implies (input-expression-equiv inexpr inexpr-equiv)
          (equal (check-input-expression inexpr env)
                 (check-input-expression inexpr-equiv env)))
 :rule-classes :congruence)

Theorem: check-input-expression-of-senv-fix-env

(defthm check-input-expression-of-senv-fix-env
  (equal (check-input-expression inexpr (senv-fix env))
         (check-input-expression inexpr env)))

Theorem: check-input-expression-senv-equiv-congruence-on-env

(defthm check-input-expression-senv-equiv-congruence-on-env
  (implies (senv-equiv env env-equiv)
           (equal (check-input-expression inexpr env)
                  (check-input-expression inexpr env-equiv)))
  :rule-classes :congruence)