解决方法
是的,但正如交换在不同的地方定义并依赖于ADL一样,开始和结束也是如此. ‘通用’版本在< iterator>中定义：
// 24.6.5,range access: template <class C> auto begin(C& c) -> decltype(c.begin()); template <class C> auto begin(const C& c) -> decltype(c.begin()); template <class C> auto end(C& c) -> decltype(c.end()); template <class C> auto end(const C& c) -> decltype(c.end()); template <class T,size_t N> T* begin(T (&array)[N]); template <class T,size_t N> T* end(T (&array)[N]);
另请注意,24.6.5说：
In addition to being available via inclusion of the
<iterator>header,the function templates in 24.6.5 are available when any of the following headers are included:<array>,<deque>,<forward_list>,<list>,<map>,<regex>,<set>,<string>,<unordered_map>,<unordered_set>,and<vector>.
