Make foreach_free public and fix a few bugs.

include/eval.h

@@ -115,5 +115,14 @@ liblex_result eval_word(char* string, int index, eval_config* config, match* mat
  * @return LIBLEX_SUCCESS if all goes well, or LIBLEX_MALLOC if there was an allocation failure.
  */
 liblex_result eval_all(char* string, int index, eval_config* config, ll* matches);
+/**
+ * Function intended to be passed to "foreach" calls in libds.
+ * Since eval_all creates a lot of matches and puts them all in a linked list,
+ * this function takes care of freeing the matches.
+ * @param data the match being freed
+ * @param args unused
+ * @return always 0.
+ */
+int eval_foreach_match_free(void *data, va_list args);
 
 #endif

include/liblex.h

@@ -16,7 +16,11 @@ enum liblex_result_e {
   /**
    * Represents an invalid pattern.
    */
-  LIBLEX_INVALID
+  LIBLEX_INVALID,
+  /**
+   * Represents an unrecognized token.
+   */
+  LIBLEX_UNRECOGNIZED
 };
 
 typedef enum liblex_result_e liblex_result;