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gcc/libstdc++-v3/include/debug/array

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// Debugging array implementation -*- C++ -*-
// Copyright (C) 2012-2013 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 debug/array
* This is a Standard C++ Library header.
*/
#ifndef _GLIBCXX_DEBUG_ARRAY
#define _GLIBCXX_DEBUG_ARRAY 1
#pragma GCC system_header
#include <debug/safe_sequence.h>
namespace std _GLIBCXX_VISIBILITY(default)
{
namespace __debug
{
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;
template<std::size_t _Size>
struct _Array_check_subscript
{
std::size_t size() { return _Size; }
_Array_check_subscript(std::size_t __index)
{ __glibcxx_check_subscript(__index); }
};
template<std::size_t _Size>
struct _Array_check_nonempty
{
bool empty() { return _Size == 0; }
_Array_check_nonempty()
{ __glibcxx_check_nonempty(); }
};
// 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
{
__glibcxx_check_subscript(__n);
return _AT_Type::_S_ref(_M_elems, __n);
}
constexpr const_reference
operator[](size_type __n) const noexcept
{
return __n < _Nm ? _AT_Type::_S_ref(_M_elems, __n)
: (_GLIBCXX_THROW_OR_ABORT(_Array_check_subscript<_Nm>(__n)),
_AT_Type::_S_ref(_M_elems, 0));
}
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
{
__glibcxx_check_nonempty();
return *begin();
}
constexpr const_reference
front() const noexcept
{
return _Nm ? _AT_Type::_S_ref(_M_elems, 0)
: (_GLIBCXX_THROW_OR_ABORT(_Array_check_nonempty<_Nm>()),
_AT_Type::_S_ref(_M_elems, 0));
}
reference
back() noexcept
{
__glibcxx_check_nonempty();
return _Nm ? *(end() - 1) : *end();
}
constexpr const_reference
back() const noexcept
{
return _Nm ? _AT_Type::_S_ref(_M_elems, _Nm - 1)
: (_GLIBCXX_THROW_OR_ABORT(_Array_check_nonempty<_Nm>()),
_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(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);
}
} // namespace __debug
// Tuple interface to class template array.
/// tuple_size
template<typename _Tp, std::size_t _Nm>
struct tuple_size<__debug::array<_Tp, _Nm>>
: public integral_constant<std::size_t, _Nm> { };
/// tuple_element
template<std::size_t _Int, typename _Tp, std::size_t _Nm>
struct tuple_element<_Int, __debug::array<_Tp, _Nm>>
{
static_assert(_Int < _Nm, "index is out of bounds");
typedef _Tp type;
};
} // namespace std
#endif // _GLIBCXX_DEBUG_ARRAY
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