include/stack

// -*- C++ -*-
//===---------------------------- stack -----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_STACK
#define _LIBCPP_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 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);

 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 <class... Args> reference emplace(Args&&... args); // reference in C++17
 void pop();

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

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

} // std

*/

#include <__config>
#include <deque>

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

_LIBCPP_BEGIN_NAMESPACE_STD

template <class _Tp, class _Container = deque<_Tp> > class _LIBCPP_TEMPLATE_VIS stack;

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

template <class _Tp, class _Container>
_LIBCPP_INLINE_VISIBILITY
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_INLINE_VISIBILITY
 stack()
 _NOEXCEPT_(is_nothrow_default_constructible<container_type>::value)
 : c() {}

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

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


#ifndef _LIBCPP_CXX03_LANG
 _LIBCPP_INLINE_VISIBILITY
 stack(stack&& __q)
 _NOEXCEPT_(is_nothrow_move_constructible<container_type>::value)
 : c(_VSTD::move(__q.c)) {}

 _LIBCPP_INLINE_VISIBILITY
 stack& operator=(stack&& __q)
 _NOEXCEPT_(is_nothrow_move_assignable<container_type>::value)
 {c = _VSTD::move(__q.c); return *this;}

 _LIBCPP_INLINE_VISIBILITY
 explicit stack(container_type&& __c) : c(_VSTD::move(__c)) {}
#endif // _LIBCPP_CXX03_LANG

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

 template <class _Alloc>
 _LIBCPP_INLINE_VISIBILITY
 explicit stack(const _Alloc& __a,
 typename enable_if<uses_allocator<container_type,
 _Alloc>::value>::type* = 0)
 : c(__a) {}
 template <class _Alloc>
 _LIBCPP_INLINE_VISIBILITY
 stack(const container_type& __c, const _Alloc& __a,
 typename enable_if<uses_allocator<container_type,
 _Alloc>::value>::type* = 0)
 : c(__c, __a) {}
 template <class _Alloc>
 _LIBCPP_INLINE_VISIBILITY
 stack(const stack& __s, const _Alloc& __a,
 typename enable_if<uses_allocator<container_type,
 _Alloc>::value>::type* = 0)
 : c(__s.c, __a) {}
#ifndef _LIBCPP_CXX03_LANG
 template <class _Alloc>
 _LIBCPP_INLINE_VISIBILITY
 stack(container_type&& __c, const _Alloc& __a,
 typename enable_if<uses_allocator<container_type,
 _Alloc>::value>::type* = 0)
 : c(_VSTD::move(__c), __a) {}
 template <class _Alloc>
 _LIBCPP_INLINE_VISIBILITY
 stack(stack&& __s, const _Alloc& __a,
 typename enable_if<uses_allocator<container_type,
 _Alloc>::value>::type* = 0)
 : c(_VSTD::move(__s.c), __a) {}
#endif // _LIBCPP_CXX03_LANG

 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
 bool empty() const {return c.empty();}
 _LIBCPP_INLINE_VISIBILITY
 size_type size() const {return c.size();}
 _LIBCPP_INLINE_VISIBILITY
 reference top() {return c.back();}
 _LIBCPP_INLINE_VISIBILITY
 const_reference top() const {return c.back();}

 _LIBCPP_INLINE_VISIBILITY
 void push(const value_type& __v) {c.push_back(__v);}
#ifndef _LIBCPP_CXX03_LANG
 _LIBCPP_INLINE_VISIBILITY
 void push(value_type&& __v) {c.push_back(_VSTD::move(__v));}

 template <class... _Args>
 _LIBCPP_INLINE_VISIBILITY
#if _LIBCPP_STD_VER > 14
 reference emplace(_Args&&... __args)
 { return c.emplace_back(_VSTD::forward<_Args>(__args)...);}
#else
 void emplace(_Args&&... __args)
 { c.emplace_back(_VSTD::forward<_Args>(__args)...);}
#endif
#endif // _LIBCPP_CXX03_LANG

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

 _LIBCPP_INLINE_VISIBILITY
 void swap(stack& __s)
 _NOEXCEPT_(__is_nothrow_swappable<container_type>::value)
 {
 using _VSTD::swap;
 swap(c, __s.c);
 }

 template <class T1, class _C1>
 friend
 bool
 operator==(const stack<T1, _C1>& __x, const stack<T1, _C1>& __y);

 template <class T1, class _C1>
 friend
 bool
 operator< (const stack<T1, _C1>& __x, const stack<T1, _C1>& __y);
};

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

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

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

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

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

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

template <class _Tp, class _Container>
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if<
 __is_swappable<_Container>::value,
 void
>::type
swap(stack<_Tp, _Container>& __x, stack<_Tp, _Container>& __y)
 _NOEXCEPT_(_NOEXCEPT_(__x.swap(__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

#endif // _LIBCPP_STACK