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Identifiers

Identifier-ignore-p

Check if a Java Unicode character is ignorable in identifiers.

Signature
(identifier-ignore-p char) → yes/no
Arguments: char — Guard (unicodep char).
Returns: yes/no — Type (booleanp yes/no).

This puts together ascii-identifier-ignore-p and nonascii-identifier-ignore-p.

Definitions and Theorems

Function: identifier-ignore-p

(defun identifier-ignore-p (char)
  (declare (xargs :guard (unicodep char)))
  (let ((__function__ 'identifier-ignore-p))
    (declare (ignorable __function__))
    (b* ((char (mbe :logic (unicode-fix char)
                    :exec char)))
      (cond ((asciip char)
             (ascii-identifier-ignore-p char))
            (t (nonascii-identifier-ignore-p char))))))

Theorem: booleanp-of-identifier-ignore-p

(defthm booleanp-of-identifier-ignore-p
  (b* ((yes/no (identifier-ignore-p char)))
    (booleanp yes/no))
  :rule-classes :rewrite)

Theorem: identifier-ignore-p-of-unicode-fix-char

(defthm identifier-ignore-p-of-unicode-fix-char
  (equal (identifier-ignore-p (unicode-fix char))
         (identifier-ignore-p char)))

Theorem: identifier-ignore-p-unicode-equiv-congruence-on-char

(defthm identifier-ignore-p-unicode-equiv-congruence-on-char
  (implies (unicode-equiv char char-equiv)
           (equal (identifier-ignore-p char)
                  (identifier-ignore-p char-equiv)))
  :rule-classes :congruence)