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• Syntax-abstraction

Abstract-fail

Called when abstraction fails.

Signature

(abstract-fail) → nothing

Returns

nothing — Type (null nothing).

The error message does not carry a lot of information, but it keeps the abstraction functions simple for now.

Definitions and Theorems

Function: abstract-fail

(defun abstract-fail nil
  (declare (xargs :guard t))
  (hard-error 'abnf
              "ABNF Grammar Abstraction Error." nil))

Theorem: null-of-abstract-fail

(defthm null-of-abstract-fail
  (b* ((nothing (abstract-fail)))
    (null nothing))
  :rule-classes :rewrite)