anchor.diff:            syntax-skip-expr-prefix-forward
             syntax-skip-expr-prefix-backward
             syntax-scan-range
  -          in-string-p
  -          in-comment-p
             search-comment-start-forward
             search-comment-start-backward
             search-string-start-forward
  
positive.code:       (setf (buffer-value buffer 'syntax-ppss-cache)
              cache-list)
        state)))
  
negative.code:           skip-space-and-comment-backward
            symbol-string-at-point
            form-offset
            scan-lists
            parse-partial-sexp
            syntax-ppss
            in-string-p
            in-comment-p
            in-string-or-comment-p))
  
  (define-editor-variable enable-syntax-highlight nil)
  (defvar *global-syntax-highlight* t)
  