const和nonconst STL迭代器 [英] const and nonconst STL Iterators

问题描述

:: const_iterator 和 :: iterator 之间的区别是什么？另一个？

What is the difference between a ::const_iterator and an ::iterator and where would you use one over the other?

推荐答案

const_iterator 它们指向的值，正则迭代器做。

const_iterators don't allow you to change the values that they point to, regular iterators do.

与C ++中的所有东西一样， code> const ，除非有很好的理由使用常规的迭代器（即你想使用它们不是 const 以更改指向的值）。

As with all things in C++, always prefer const, unless there's a good reason to use regular iterators (i.e. you want to use the fact that they're not const to change the pointed-to value).

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