// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___CXX03_STACK
#define _LIBCPP___CXX03_STACK

/*
    stack synopsis

namespace std
{

template <class T, class Container = deque<T>>
class stack
{
public:
    typedef Container                                container_type;
    typedef typename container_type::value_type      value_type;
    typedef typename container_type::reference       reference;
    typedef typename container_type::const_reference const_reference;
    typedef typename container_type::size_type       size_type;

protected:
    container_type c;

public:
    stack() = default;
    ~stack() = default;

    stack(const stack& q) = default;
    stack(stack&& q) = default;

    stack& operator=(const stack& q) = default;
    stack& operator=(stack&& q) = default;

    explicit stack(const container_type& c);
    explicit stack(container_type&& c);
    template <class InputIterator> stack(InputIterator first, InputIterator last); // since C++23
    template<container-compatible-range<T> R> stack(from_range_t, R&& rg); // since C++23
    template <class Alloc> explicit stack(const Alloc& a);
    template <class Alloc> stack(const container_type& c, const Alloc& a);
    template <class Alloc> stack(container_type&& c, const Alloc& a);
    template <class Alloc> stack(const stack& c, const Alloc& a);
    template <class Alloc> stack(stack&& c, const Alloc& a);
    template<class InputIterator, class Alloc>
    stack(InputIterator first, InputIterator last, const Alloc&); // since C++23
    template<container-compatible-range<T> R, class Alloc>
      stack(from_range_t, R&& rg, const Alloc&); // since C++23

    bool empty() const;
    size_type size() const;
    reference top();
    const_reference top() const;

    void push(const value_type& x);
    void push(value_type&& x);
    template<container-compatible-range<T> R>
      void push_range(R&& rg); // C++23
    template <class... Args> reference emplace(Args&&... args); // reference in C++17
    void pop();

    void swap(stack& c) noexcept(is_nothrow_swappable_v<Container>)
};

template<class Container>
  stack(Container) -> stack<typename Container::value_type, Container>;  // C++17

template<class InputIterator>
  stack(InputIterator, InputIterator) -> stack<iter-value-type<InputIterator>>; // since C++23

template<ranges::input_range R>
  stack(from_range_t, R&&) -> stack<ranges::range_value_t<R>>; // since C++23

template<class Container, class Allocator>
  stack(Container, Allocator) -> stack<typename Container::value_type, Container>; // C++17

template<class InputIterator, class Allocator>
  stack(InputIterator, InputIterator, Allocator)
    -> stack<iter-value-type<InputIterator>,
             deque<iter-value-type<InputIterator>, Allocator>>; // since C++23

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>>; // since C++23

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); // since C++20

template <class T, class Container>
  void swap(stack<T, Container>& x, stack<T, Container>& y)
  noexcept(noexcept(x.swap(y)));

}  // std

*/

#include <__cxx03/__config>
#include <__cxx03/__fwd/stack.h>
#include <__cxx03/__iterator/back_insert_iterator.h>
#include <__cxx03/__iterator/iterator_traits.h>
#include <__cxx03/__memory/uses_allocator.h>
#include <__cxx03/__type_traits/is_same.h>
#include <__cxx03/__utility/forward.h>
#include <__cxx03/deque>
#include <__cxx03/version>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

_LIBCPP_PUSH_MACROS
#include <__cxx03/__undef_macros>

_LIBCPP_BEGIN_NAMESPACE_STD

template <class _Tp, class _Container>
_LIBCPP_HIDE_FROM_ABI bool operator==(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y);

template <class _Tp, class _Container>
_LIBCPP_HIDE_FROM_ABI bool operator<(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y);

template <class _Tp, class _Container /*= deque<_Tp>*/>
class _LIBCPP_TEMPLATE_VIS stack {
public:
  typedef _Container container_type;
  typedef typename container_type::value_type value_type;
  typedef typename container_type::reference reference;
  typedef typename container_type::const_reference const_reference;
  typedef typename container_type::size_type size_type;
  static_assert(is_same<_Tp, value_type>::value, "");

protected:
  container_type c;

public:
  _LIBCPP_HIDE_FROM_ABI stack() : c() {}

  _LIBCPP_HIDE_FROM_ABI stack(const stack& __q) : c(__q.c) {}

  _LIBCPP_HIDE_FROM_ABI stack& operator=(const stack& __q) {
    c = __q.c;
    return *this;
  }

  _LIBCPP_HIDE_FROM_ABI explicit stack(const container_type& __c) : c(__c) {}

  template <class _Alloc>
  _LIBCPP_HIDE_FROM_ABI explicit stack(const _Alloc& __a,
                                       __enable_if_t<uses_allocator<container_type, _Alloc>::value>* = 0)
      : c(__a) {}
  template <class _Alloc>
  _LIBCPP_HIDE_FROM_ABI
  stack(const container_type& __c, const _Alloc& __a, __enable_if_t<uses_allocator<container_type, _Alloc>::value>* = 0)
      : c(__c, __a) {}
  template <class _Alloc>
  _LIBCPP_HIDE_FROM_ABI
  stack(const stack& __s, const _Alloc& __a, __enable_if_t<uses_allocator<container_type, _Alloc>::value>* = 0)
      : c(__s.c, __a) {}

  _LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool empty() const { return c.empty(); }
  _LIBCPP_HIDE_FROM_ABI size_type size() const { return c.size(); }
  _LIBCPP_HIDE_FROM_ABI reference top() { return c.back(); }
  _LIBCPP_HIDE_FROM_ABI const_reference top() const { return c.back(); }

  _LIBCPP_HIDE_FROM_ABI void push(const value_type& __v) { c.push_back(__v); }

  _LIBCPP_HIDE_FROM_ABI void pop() { c.pop_back(); }

  _LIBCPP_HIDE_FROM_ABI void swap(stack& __s) {
    using std::swap;
    swap(c, __s.c);
  }

  _LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI const _Container& __get_container() const { return c; }

  template <class _T1, class _OtherContainer>
  friend bool operator==(const stack<_T1, _OtherContainer>& __x, const stack<_T1, _OtherContainer>& __y);

  template <class _T1, class _OtherContainer>
  friend bool operator<(const stack<_T1, _OtherContainer>& __x, const stack<_T1, _OtherContainer>& __y);
};

template <class _Tp, class _Container>
inline _LIBCPP_HIDE_FROM_ABI bool operator==(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y) {
  return __x.c == __y.c;
}

template <class _Tp, class _Container>
inline _LIBCPP_HIDE_FROM_ABI bool operator<(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y) {
  return __x.c < __y.c;
}

template <class _Tp, class _Container>
inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y) {
  return !(__x == __y);
}

template <class _Tp, class _Container>
inline _LIBCPP_HIDE_FROM_ABI bool operator>(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y) {
  return __y < __x;
}

template <class _Tp, class _Container>
inline _LIBCPP_HIDE_FROM_ABI bool operator>=(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y) {
  return !(__x < __y);
}

template <class _Tp, class _Container>
inline _LIBCPP_HIDE_FROM_ABI bool operator<=(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y) {
  return !(__y < __x);
}

template <class _Tp, class _Container, __enable_if_t<__is_swappable_v<_Container>, int> = 0>
inline _LIBCPP_HIDE_FROM_ABI void swap(stack<_Tp, _Container>& __x, stack<_Tp, _Container>& __y) {
  __x.swap(__y);
}

template <class _Tp, class _Container, class _Alloc>
struct _LIBCPP_TEMPLATE_VIS uses_allocator<stack<_Tp, _Container>, _Alloc> : public uses_allocator<_Container, _Alloc> {
};

_LIBCPP_END_NAMESPACE_STD

_LIBCPP_POP_MACROS

#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES)
#  include <__cxx03/functional>
#  include <__cxx03/type_traits>
#endif

#endif // _LIBCPP___CXX03_STACK