340 lines
9.6 KiB
C++
340 lines
9.6 KiB
C++
// <array> -*- C++ -*-
|
|
|
|
// Copyright (C) 2007-2015 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library is free
|
|
// software; you can redistribute it and/or modify it under the
|
|
// terms of the GNU General Public License as published by the
|
|
// Free Software Foundation; either version 3, or (at your option)
|
|
// any later version.
|
|
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// Under Section 7 of GPL version 3, you are granted additional
|
|
// permissions described in the GCC Runtime Library Exception, version
|
|
// 3.1, as published by the Free Software Foundation.
|
|
|
|
// You should have received a copy of the GNU General Public License and
|
|
// a copy of the GCC Runtime Library Exception along with this program;
|
|
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
/** @file include/array
|
|
* This is a Standard C++ Library header.
|
|
*/
|
|
|
|
#ifndef _GLIBCXX_ARRAY
|
|
#define _GLIBCXX_ARRAY 1
|
|
|
|
#pragma GCC system_header
|
|
|
|
#if __cplusplus < 201103L
|
|
# include <bits/c++0x_warning.h>
|
|
#else
|
|
|
|
#include <stdexcept>
|
|
#include <bits/stl_algobase.h>
|
|
#include <bits/range_access.h>
|
|
|
|
namespace std _GLIBCXX_VISIBILITY(default)
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
|
|
|
|
template<typename _Tp, std::size_t _Nm>
|
|
struct __array_traits
|
|
{
|
|
typedef _Tp _Type[_Nm];
|
|
|
|
static constexpr _Tp&
|
|
_S_ref(const _Type& __t, std::size_t __n) noexcept
|
|
{ return const_cast<_Tp&>(__t[__n]); }
|
|
};
|
|
|
|
template<typename _Tp>
|
|
struct __array_traits<_Tp, 0>
|
|
{
|
|
struct _Type { };
|
|
|
|
static constexpr _Tp&
|
|
_S_ref(const _Type&, std::size_t) noexcept
|
|
{ return *static_cast<_Tp*>(nullptr); }
|
|
};
|
|
|
|
/**
|
|
* @brief A standard container for storing a fixed size sequence of elements.
|
|
*
|
|
* @ingroup sequences
|
|
*
|
|
* Meets the requirements of a <a href="tables.html#65">container</a>, a
|
|
* <a href="tables.html#66">reversible container</a>, and a
|
|
* <a href="tables.html#67">sequence</a>.
|
|
*
|
|
* Sets support random access iterators.
|
|
*
|
|
* @tparam Tp Type of element. Required to be a complete type.
|
|
* @tparam N Number of elements.
|
|
*/
|
|
template<typename _Tp, std::size_t _Nm>
|
|
struct array
|
|
{
|
|
typedef _Tp value_type;
|
|
typedef value_type* pointer;
|
|
typedef const value_type* const_pointer;
|
|
typedef value_type& reference;
|
|
typedef const value_type& const_reference;
|
|
typedef value_type* iterator;
|
|
typedef const value_type* const_iterator;
|
|
typedef std::size_t size_type;
|
|
typedef std::ptrdiff_t difference_type;
|
|
typedef std::reverse_iterator<iterator> reverse_iterator;
|
|
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
|
|
|
|
// Support for zero-sized arrays mandatory.
|
|
typedef _GLIBCXX_STD_C::__array_traits<_Tp, _Nm> _AT_Type;
|
|
typename _AT_Type::_Type _M_elems;
|
|
|
|
// No explicit construct/copy/destroy for aggregate type.
|
|
|
|
// DR 776.
|
|
void
|
|
fill(const value_type& __u)
|
|
{ std::fill_n(begin(), size(), __u); }
|
|
|
|
void
|
|
swap(array& __other)
|
|
noexcept(noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>())))
|
|
{ std::swap_ranges(begin(), end(), __other.begin()); }
|
|
|
|
// Iterators.
|
|
iterator
|
|
begin() noexcept
|
|
{ return iterator(data()); }
|
|
|
|
const_iterator
|
|
begin() const noexcept
|
|
{ return const_iterator(data()); }
|
|
|
|
iterator
|
|
end() noexcept
|
|
{ return iterator(data() + _Nm); }
|
|
|
|
const_iterator
|
|
end() const noexcept
|
|
{ return const_iterator(data() + _Nm); }
|
|
|
|
reverse_iterator
|
|
rbegin() noexcept
|
|
{ return reverse_iterator(end()); }
|
|
|
|
const_reverse_iterator
|
|
rbegin() const noexcept
|
|
{ return const_reverse_iterator(end()); }
|
|
|
|
reverse_iterator
|
|
rend() noexcept
|
|
{ return reverse_iterator(begin()); }
|
|
|
|
const_reverse_iterator
|
|
rend() const noexcept
|
|
{ return const_reverse_iterator(begin()); }
|
|
|
|
const_iterator
|
|
cbegin() const noexcept
|
|
{ return const_iterator(data()); }
|
|
|
|
const_iterator
|
|
cend() const noexcept
|
|
{ return const_iterator(data() + _Nm); }
|
|
|
|
const_reverse_iterator
|
|
crbegin() const noexcept
|
|
{ return const_reverse_iterator(end()); }
|
|
|
|
const_reverse_iterator
|
|
crend() const noexcept
|
|
{ return const_reverse_iterator(begin()); }
|
|
|
|
// Capacity.
|
|
constexpr size_type
|
|
size() const noexcept { return _Nm; }
|
|
|
|
constexpr size_type
|
|
max_size() const noexcept { return _Nm; }
|
|
|
|
constexpr bool
|
|
empty() const noexcept { return size() == 0; }
|
|
|
|
// Element access.
|
|
reference
|
|
operator[](size_type __n) noexcept
|
|
{ return _AT_Type::_S_ref(_M_elems, __n); }
|
|
|
|
constexpr const_reference
|
|
operator[](size_type __n) const noexcept
|
|
{ return _AT_Type::_S_ref(_M_elems, __n); }
|
|
|
|
reference
|
|
at(size_type __n)
|
|
{
|
|
if (__n >= _Nm)
|
|
std::__throw_out_of_range_fmt(__N("array::at: __n (which is %zu) "
|
|
">= _Nm (which is %zu)"),
|
|
__n, _Nm);
|
|
return _AT_Type::_S_ref(_M_elems, __n);
|
|
}
|
|
|
|
constexpr const_reference
|
|
at(size_type __n) const
|
|
{
|
|
// Result of conditional expression must be an lvalue so use
|
|
// boolean ? lvalue : (throw-expr, lvalue)
|
|
return __n < _Nm ? _AT_Type::_S_ref(_M_elems, __n)
|
|
: (std::__throw_out_of_range_fmt(__N("array::at: __n (which is %zu) "
|
|
">= _Nm (which is %zu)"),
|
|
__n, _Nm),
|
|
_AT_Type::_S_ref(_M_elems, 0));
|
|
}
|
|
|
|
reference
|
|
front() noexcept
|
|
{ return *begin(); }
|
|
|
|
constexpr const_reference
|
|
front() const noexcept
|
|
{ return _AT_Type::_S_ref(_M_elems, 0); }
|
|
|
|
reference
|
|
back() noexcept
|
|
{ return _Nm ? *(end() - 1) : *end(); }
|
|
|
|
constexpr const_reference
|
|
back() const noexcept
|
|
{
|
|
return _Nm ? _AT_Type::_S_ref(_M_elems, _Nm - 1)
|
|
: _AT_Type::_S_ref(_M_elems, 0);
|
|
}
|
|
|
|
pointer
|
|
data() noexcept
|
|
{ return std::__addressof(_AT_Type::_S_ref(_M_elems, 0)); }
|
|
|
|
const_pointer
|
|
data() const noexcept
|
|
{ return std::__addressof(_AT_Type::_S_ref(_M_elems, 0)); }
|
|
};
|
|
|
|
// Array comparisons.
|
|
template<typename _Tp, std::size_t _Nm>
|
|
inline bool
|
|
operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
|
|
{ return std::equal(__one.begin(), __one.end(), __two.begin()); }
|
|
|
|
template<typename _Tp, std::size_t _Nm>
|
|
inline bool
|
|
operator!=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
|
|
{ return !(__one == __two); }
|
|
|
|
template<typename _Tp, std::size_t _Nm>
|
|
inline bool
|
|
operator<(const array<_Tp, _Nm>& __a, const array<_Tp, _Nm>& __b)
|
|
{
|
|
return std::lexicographical_compare(__a.begin(), __a.end(),
|
|
__b.begin(), __b.end());
|
|
}
|
|
|
|
template<typename _Tp, std::size_t _Nm>
|
|
inline bool
|
|
operator>(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
|
|
{ return __two < __one; }
|
|
|
|
template<typename _Tp, std::size_t _Nm>
|
|
inline bool
|
|
operator<=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
|
|
{ return !(__one > __two); }
|
|
|
|
template<typename _Tp, std::size_t _Nm>
|
|
inline bool
|
|
operator>=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
|
|
{ return !(__one < __two); }
|
|
|
|
// Specialized algorithms.
|
|
template<typename _Tp, std::size_t _Nm>
|
|
inline void
|
|
swap(array<_Tp, _Nm>& __one, array<_Tp, _Nm>& __two)
|
|
noexcept(noexcept(__one.swap(__two)))
|
|
{ __one.swap(__two); }
|
|
|
|
template<std::size_t _Int, typename _Tp, std::size_t _Nm>
|
|
constexpr _Tp&
|
|
get(array<_Tp, _Nm>& __arr) noexcept
|
|
{
|
|
static_assert(_Int < _Nm, "index is out of bounds");
|
|
return _GLIBCXX_STD_C::__array_traits<_Tp, _Nm>::
|
|
_S_ref(__arr._M_elems, _Int);
|
|
}
|
|
|
|
template<std::size_t _Int, typename _Tp, std::size_t _Nm>
|
|
constexpr _Tp&&
|
|
get(array<_Tp, _Nm>&& __arr) noexcept
|
|
{
|
|
static_assert(_Int < _Nm, "index is out of bounds");
|
|
return std::move(_GLIBCXX_STD_C::get<_Int>(__arr));
|
|
}
|
|
|
|
template<std::size_t _Int, typename _Tp, std::size_t _Nm>
|
|
constexpr const _Tp&
|
|
get(const array<_Tp, _Nm>& __arr) noexcept
|
|
{
|
|
static_assert(_Int < _Nm, "index is out of bounds");
|
|
return _GLIBCXX_STD_C::__array_traits<_Tp, _Nm>::
|
|
_S_ref(__arr._M_elems, _Int);
|
|
}
|
|
|
|
_GLIBCXX_END_NAMESPACE_CONTAINER
|
|
} // namespace std
|
|
|
|
namespace std _GLIBCXX_VISIBILITY(default)
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
// Tuple interface to class template array.
|
|
|
|
/// tuple_size
|
|
template<typename _Tp>
|
|
class tuple_size;
|
|
|
|
/// Partial specialization for std::array
|
|
template<typename _Tp, std::size_t _Nm>
|
|
struct tuple_size<_GLIBCXX_STD_C::array<_Tp, _Nm>>
|
|
: public integral_constant<std::size_t, _Nm> { };
|
|
|
|
/// tuple_element
|
|
template<std::size_t _Int, typename _Tp>
|
|
class tuple_element;
|
|
|
|
/// Partial specialization for std::array
|
|
template<std::size_t _Int, typename _Tp, std::size_t _Nm>
|
|
struct tuple_element<_Int, _GLIBCXX_STD_C::array<_Tp, _Nm>>
|
|
{
|
|
static_assert(_Int < _Nm, "index is out of bounds");
|
|
typedef _Tp type;
|
|
};
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace std
|
|
|
|
#ifdef _GLIBCXX_DEBUG
|
|
# include <debug/array>
|
|
#endif
|
|
|
|
#ifdef _GLIBCXX_PROFILE
|
|
# include <profile/array>
|
|
#endif
|
|
|
|
#endif // C++11
|
|
|
|
#endif // _GLIBCXX_ARRAY
|