std::priority_queue也可以使用emplace 3. 使用标准库std::priority_queue实现定时器案例 1.前言 案例:使用最小堆(优先队列方式)实现 定时器功能,基于boost::heap::priority_queue实现。 由于,4.4 是先写的,所以重复的内容不做介绍,可以先看4.4 那篇文章,本篇也会对比 标准库与boost库的区别。这两
providing a specific set of member functions to access its elements. Elements are popped from the "back" of the specific container, which is known as the top of the priority queue.
Pushes a new element to the priority queue. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element is called with exactly the same arguments as supplied to the function. Effectively calls c.emplace_back(std::forward<Args>(args...
对数次比较加上 Container::emplace_back 的复杂度。 示例运行此代码 #include <iostream> #include <queue> struct S { int id; S(int i, double d, std::string s) : id{i} { std::cout << "S::S(" << i << ", " << d << ", \"" << s << "\");\n"; } friend bool ...
std::priority_queue::swap std::priority_queue::top std::queue std::queue::back std::queue::emplace std::queue::empty std::queue::front std::queue::pop std::queue::push std::queue::queue std::queue::size std::queue::swap std::set std::set::begin std::set::cbegin std::set:...
std::priority_queue::priority_queue std::priority_queue::push std::priority_queue::size std::priority_queue::swap std::priority_queue::top std::queue std::queue::back std::queue::emplace std::queue::empty std::queue::front std::queue::pop std::queue::push std::queue::queue std::...
priority_queue::empty priority_queue::size Modifiers priority_queue::push priority_queue::push_range (C++23) priority_queue::emplace (C++11) priority_queue::pop priority_queue::swap (C++11) Non-member functions swap(std::priority_queue) ...
emplace (C++11) constructs element in-place and sorts the underlying container (public member function) pop removes the top element (public member function) swap (C++11) swaps the contents (public member function) Non-member functions std::swap(std::priority_queue) ...
std::priority_queue::swap std::priority_queue::top std::queue std::queue::back std::queue::emplace std::queue::empty std::queue::front std::queue::pop std::queue::push std::queue::queue std::queue::size std::queue::swap std::set std::set::begin std::set::cbegin std::set:...
priority_queue 是容器适配器,它提供常数时间的(默认)最大元素查找,对数代价的插入与释出。 可用用户提供的 Compare 更改顺序,例如,用 std::greater<T> 将导致最小元素作为 top() 出现。 用priority_queue 工作类似管理某些随机访问容器中的堆,优势是不可能突然把堆非法化。 模板形参 T - 存储的元素类型。