completer_word_break_characters

static VALUE
readline_s_get_completer_word_break_characters(VALUE self, VALUE str)
{
#ifdef HAVE_RL_COMPLETER_WORD_BREAK_CHARACTERS
    rb_secure(4);
    if (rl_completer_word_break_characters == NULL)
        return Qnil;
    return rb_locale_str_new_cstr(rl_completer_word_break_characters);
#else
    rb_notimplement();
    return Qnil; /* not reached */
#endif /* HAVE_RL_COMPLETER_WORD_BREAK_CHARACTERS */
}