标准库头文件 <stack>
来自cppreference.com
此头文件是容器库的一部分。
包含 | |
| (C++20) |
三路比较运算符支持 |
| (C++11) |
std::initializer_list 类模板 |
类 | |
| 适配一个容器以提供栈（LIFO 数据结构） (类模板) | |
| 特化 std::uses_allocator 类型特征 (类模板特化) | |
函数 | |
| 按照字典顺序比较 stack 中的值 (函数模板) | |
| 特化 std::swap 算法 (函数模板) | |
概要
#include <compare> #include <initializer_list> namespace std { template<class T, class Container = deque<T>> class stack; template<class T, class Container> bool operator==(const stack<T, Container>& x, const stack<T, Container>& y); template<class T, class Container> bool operator!=(const stack<T, Container>& x, const stack<T, Container>& y); template<class T, class Container> bool operator< (const stack<T, Container>& x, const stack<T, Container>& y); template<class T, class Container> bool operator> (const stack<T, Container>& x, const stack<T, Container>& y); template<class T, class Container> bool operator<=(const stack<T, Container>& x, const stack<T, Container>& y); template<class T, class Container> bool operator>=(const stack<T, Container>& x, const stack<T, Container>& y); template<class T, three_way_comparable Container> compare_three_way_result_t<Container> operator<=>(const stack<T, Container>& x, const stack<T, Container>& y); template<class T, class Container> void swap(stack<T, Container>& x, stack<T, Container>& y) noexcept(noexcept(x.swap(y))); template<class T, class Container, class Alloc> struct uses_allocator<stack<T, Container>, Alloc>; }
类模板 std::stack
namespace std { template<class T, class Container = deque<T>> class stack { public: using value_type = typename Container::value_type; using reference = typename Container::reference; using const_reference = typename Container::const_reference; using size_type = typename Container::size_type; using container_type = Container; protected: Container c; public: stack() : stack(Container()) {} explicit stack(const Container&); explicit stack(Container&&); template<class Alloc> explicit stack(const Alloc&); template<class Alloc> stack(const Container&, const Alloc&); template<class Alloc> stack(Container&&, const Alloc&); template<class Alloc> stack(const stack&, const Alloc&); template<class Alloc> stack(stack&&, const Alloc&); [[nodiscard]] bool empty() const { return c.empty(); } size_type size() const { return c.size(); } reference top() { return c.back(); } const_reference top() const { return c.back(); } void push(const value_type& x) { c.push_back(x); } void push(value_type&& x) { c.push_back(std::move(x)); } template<class... Args> decltype(auto) emplace(Args&&... args) { return c.emplace_back(std::forward<Args>(args)...); } void pop() { c.pop_back(); } void swap(stack& s) noexcept(is_nothrow_swappable_v<Container>) { using std::swap; swap(c, s.c); } }; template<class Container> stack(Container) -> stack<typename Container::value_type, Container>; template<class Container, class Allocator> stack(Container, Allocator) -> stack<typename Container::value_type, Container>; template<class T, class Container, class Alloc> struct uses_allocator<stack<T, Container>, Alloc> : uses_allocator<Container, Alloc>::type { }; }
