is_array.el

(defun is-array-def ()
  (save-excursion
    (let (end-of-statement (save-excursion (search-forward ";")))
      ;; it's an array if we find all of the following characters before                                                  
      ;; the next semi-colon: `[={'. Is that good enough??                                                                
      (and (re-search-forward "\\[" end-of-statement t)
           (re-search-forward "=" end-of-statement t)
           (re-search-forward "{" end-of-statement t)))))

Test with:

int stuff[] = {1,2,3};

put point at the beginning of the line and run the function. Use edebug to verify that point isn't getting restored.

Fix is simple: need another set of parens around my let binding variables. DOH!