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Boolean-literals

Boolean-literalp

Recognize the Java boolean literals.

Signature
(boolean-literalp x) → yes/no
Returns: yes/no — Type (booleanp yes/no).

A Java boolean literal is a list of Java Unicode characters that consists of the (ASCII) codes of an element of *boolean-literals*.

Definitions and Theorems

Function: boolean-literalp

(defun boolean-literalp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'boolean-literalp))
    (declare (ignorable __function__))
    (and (ascii-listp x)
         (member-equal (ascii=>string x)
                       *boolean-literals*)
         t)))

Theorem: booleanp-of-boolean-literalp

(defthm booleanp-of-boolean-literalp
  (b* ((yes/no (boolean-literalp x)))
    (booleanp yes/no))
  :rule-classes :rewrite)