一對開始和結束迭代器 - 它有一個名字嗎？

Question

在C++中，是否有定義代表一對迭代器的struct（或類） - 一個開始和一個結束迭代器？代表這一點的最佳做法是什麼？ std::pair？我知道我可以很容易地建立自己的，但我想遵循慣例。

我搜索以下：

template<class It> 
struct XXX { 
private: 
    It b; 
    It e; 
public: 
    It begin() const { return b; } 
    It end() const { return e; } 
    // ... 
}; 

Answer 1

有無看看Boost.Range，特別是boost::iterator_range。

Answer 2

如果是一對，它只是兩個任意迭代器 - 一對迭代。

如果它碰巧是一對具有某些假設的迭代器，例如「它們指向同一個容器」，我會將它稱爲「範圍」，因爲這就是它在整個標準模板的文檔中所稱的庫：

• SGI Introduction to the Standard Template Library寫Find takes three arguments: two iterators that define a range, and a value to search for in that range. It examines each iterator in the range [first, last), proceeding from the beginning to the end, and stops either when it finds an iterator that points to value or when it reaches the end of the range.。

• cplusplus.com寫入（是的，我知道該網站的信譽比較差，但無論如何）：A range is any sequence of objects that can be accessed through iterators or pointers, such as an array or an instance of some of the STL containers.

• 的Working Draft for the C++ Standard中寫道24.2.1條第7款：A range is a pair of iterators that designate the beginning and end of the computation. A range [i,i) is an empty range; in general, a range [i,j) refers to the elements in the data structure starting with the element pointed to by i and up to but not including the element pointed to by j