Standard library header <stack>

 

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Standard library headers

Language support <cfloat> <climits> <compare>(C++20) <contracts>(C++26) <coroutine>(C++20) <csetjmp> <csignal> <cstdarg> <cstddef> <cstdint>(C++11) <cstdlib> <exception> <initializer_list>(C++11)    <limits> <new> <source_location>(C++20) <stdfloat>(C++23) <typeinfo> <version>(C++20) Concepts <concepts>(C++20) Diagnostics <cassert> <cerrno> <debugging>(C++26) <stacktrace>(C++23) <stdexcept> <system_error>(C++11) Memory management <memory> <memory_resource>(C++17) <scoped_allocator>(C++11) Metaprogramming <type_traits>(C++11) <ratio>(C++11)

General utilities <any>(C++17) <bitset> <bit>(C++20) <charconv>(C++17) <expected>(C++23) <format>(C++20) <functional> <optional>(C++17) <stdbit.h>(C++26) <tuple>(C++11) <typeindex>(C++11) <utility> <variant>(C++17) Containers <array>(C++11) <deque> <flat_map>(C++23) <flat_set>(C++23) <forward_list>(C++11) <hive>(C++26) <inplace_vector>(C++26)    <list> <map> <mdspan>(C++23) <queue> <set> <span>(C++20) <stack> <unordered_map>(C++11) <unordered_set>(C++11) <vector> Iterators <iterator> Ranges <generator>(C++23) <ranges>(C++20)

Algorithms <algorithm> <numeric> Strings <cctype> <cstring> <cuchar>(C++11) <cwchar> <cwctype> <string_view>(C++17) <string> Text processing <clocale> <codecvt>(C++11/17/26*) <locale> <regex>(C++11) <text_encoding>(C++26)    Numerics <cfenv>(C++11) <cmath> <complex> <linalg>(C++26) <numbers>(C++20) <random>(C++11) <simd>(C++26) <stdckdint.h>(C++26) <valarray> Time <chrono>(C++11) <ctime> C compatibility <ccomplex>(C++11/17/20*) <ciso646>(until C++20) <cstdalign>(C++11/17/20*) <cstdbool>(C++11/17/20*) <ctgmath>(C++11/17/20*)

Input/output <cinttypes>(C++11) <cstdio> <filesystem>(C++17) <fstream> <iomanip> <iosfwd> <iostream> <ios> <istream> <ostream> <print>(C++23) <spanstream>(C++23) <sstream> <streambuf> <strstream>(C++98/26*) <syncstream>(C++20) Concurrency support <atomic>(C++11) <barrier>(C++20) <condition_variable>(C++11) <future>(C++11) <hazard_pointer>(C++26) <latch>(C++20) <mutex>(C++11) <rcu>(C++26) <semaphore>(C++20) <shared_mutex>(C++14) <stdatomic.h>(C++23) <stop_token>(C++20) <thread>(C++11) Execution support <execution>(C++17)

 

This header is part of the containers library.

Includes
<compare> (C++20)	Three-way comparison operator support
<initializer_list> (C++11)	std::initializer_list class template
Classes
stack	adapts a container to provide stack (LIFO data structure) (class template)
std::uses_allocator<std::stack> (C++11)	specializes the std::uses_allocator type trait (class template specialization)
Functions
operator==operator!=operator<operator<=operator>operator>=operator<=> (C++20)	lexicographically compares the values of two stacks (function template)
std::swap(std::stack) (C++11)	specializes the std::swap algorithm (function template)

Synopsis

#include <compare>#include <initializer_list>   namespace std {// class template stacktemplate<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>;   // formatter specialization for stacktemplate<class CharT, class T, formattable<CharT> Container>struct formatter<stack<T, Container>, CharT>;}

Class template 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 InputIter> stack(InputIter first, InputIter last);template<container-compatible-range<T> R> stack(from_range_t, R&& rg);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&);template<class InputIter, class Alloc> stack(InputIter first, InputIter last, const Alloc&);template<container-compatible-range<T> R, class Alloc> stack(from_range_t, R&& rg, const Alloc&);   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<container-compatible-range<T> R>void push_range(R&& rg);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>){usingstd::swap; swap(c, s.c);}};   template<class Container> stack(Container)-> stack<typename Container::value_type, Container>;   template<class InputIter> stack(InputIter, InputIter)-> stack</*iter-value-type*/<InputIter>>;   template<ranges::input_range R> stack(from_range_t, R&&)-> stack<ranges::range_value_t<R>>;   template<class Container, class Allocator> stack(Container, Allocator)-> stack<typename Container::value_type, Container>;   template<class InputIter, class Allocator> stack(InputIter, InputIter, Allocator)-> stack</*iter-value-type*/<InputIter>, deque</*iter-value-type*/<InputIter>, Allocator>>;   template<ranges::input_range R, class Allocator> stack(from_range_t, R&&, Allocator)-> stack<ranges::range_value_t<R>, deque<ranges::range_value_t<R>, Allocator>>;   template<class T, class Container, class Alloc>struct uses_allocator<stack<T, Container>, Alloc>: uses_allocator<Container, Alloc>::type{};}