typedef 函数，对这块不是很熟悉，求指点！！！

Question

void list_sort (struct list *,
                list_less_func *, void *aux);

typedef bool list_less_func (const struct list_elem *a,
                             const struct list_elem *b,
                             void *aux);

static bool less_list(const struct list_elem* ewc1,
    const struct list_elem* ewc2, void* aux) {
    /* TODO */
    bool comparefunc=list_less_func(const struct list_elem* ewc1, const struct list_elem* ewc2, void* aux);
    if (comparefunc)
        return false;
    else
        return true;
}

void wordcount_sort(word_count_list_t* wclist,
    bool less(const word_count_t*, const word_count_t*)) {
    list_sort(&wclist->lst, less_list, less);
}

对函数typedef不太熟悉，求指点，问题如下：comparfunc那块出错了，谢谢！

word_count_p.c:105:22: error: expected expression before ‘list_less_func’
bool comparefunc=list_less_func(const struct list_elem* ewc1, const struct list_elem* ewc2, void* aux);
^~~~~~~~~~~~~~

Answer 1

bool comparefunc=list_less_func( ewc1, ewc2, aux);
这样写就可以了。