std::reverse_iterator是C++标准库中的一个迭代器适配器,用于反向遍历容器。它的缺点主要有以下几点: 性能较低:由于std::reverse_iterator是通过逆向遍历容器来实现反向迭代的,所以在使用时需要先将正向迭代器转换为逆向迭代器,这个转换过程会引入额外的性能开销,导致反向迭代的效率较低。 不支持随机访问:std:
从零开始学C++之STL（三）：迭代器类vector::iterator 和 vector::reverse_iterator 的实现、迭代器类型...
Returns the underlying base iterator. That isstd::reverse_iterator(it).base() == it. The base iterator refers to the element that is next (from the std::reverse_iterator::iterator_typeperspective) to the element thereverse_iteratoris currently pointing to. That is &*(rit.base() - 1) =...
Returns the underlying base iterator. That isstd::reverse_iterator(it).base() == it. The base iterator refers to the element that is next (from the std::reverse_iterator::iterator_typeperspective) to the element thereverse_iteratoris currently pointing to. That is&*(rit.base() - 1) ==...
std::reverse_iterator 是一个反转给定迭代器方向的迭代器适配器。换言之,提供双向迭代器时, std::reverse_iterator 产生一个新的迭代器,它从底层的双向迭代器所定义的序列的末尾移动到开端。 对于从迭代器 i 构造的 r 逆向迭代器,关系 &*r == &*(i-1) 始终为 true (只要 r 可解引用);从而构造自...
std::reverse_iteratoris an iterator adaptor that reverses the direction of a given iterator, which must be at least aLegacyBidirectionalIteratoror modelbidirectional_iterator(since C++20). In other words, when provided with a bidirectional iterator,std::reverse_iteratorproduces a new iterator that mo...
底层迭代器指代(相对于 iterator_type 的)reverse_iterator 当前所指元素的下一个元素。即 &*(*this.base() - 1) == &*(*this)。 示例运行此代码 #include <iostream> #include <iterator> #include <vector> int main() { std::vector<int> v = {0, 1, 2, 3, 4, 5}; using RevIt = std:...
而rbegin的效果是reverse_iterator(end())[3]，因为end返回的迭代器应该在push_back后不变，仍然保持「...
Description of Issue std::reverse_iterator is already used in several places in the USD code base. Switching boost::reverse_iterator usage to this reduces the number of dependencies on boost. Steps to Reproduce N/A System Information (OS...
#include <iostream>#include <iterator>#include <vector>intmain(){std::vector<int>v={0,1,2,3,4,5};usingRevIt=std::reverse_iterator<std::vector<int>::iterator>;constautoit=v.begin()+3;RevIt r_it{it};std::cout<<"*it == "<<*it<<'\n'<<"*r_it == "<<*r_it<<'\n'<<...