+void utf32_iterator_tailor_word_break(utf32_iterator it,
+ unicode_property_tailor *pt);
+
+uint32_t **utf32_word_split(const uint32_t *s, size_t ns, size_t *nwp,
+ unicode_property_tailor *wbreak);
+char **utf8_word_split(const char *s, size_t ns, size_t *nwp,
+ unicode_property_tailor *wbreak);