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add forward_clist: C++14 constexpr based forward list

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bolero-MURAKAMI 2013-06-15 22:14:24 +09:00
parent e578bdd0a6
commit dbab91a53c
3 changed files with 466 additions and 4 deletions
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5
sprout/config/suffix.hpp
View file

@ -24,6 +24,11 @@
# define SPROUT_STATIC_CONSTEXPR_DATA_MEMBER_OUTER(EXPR) = EXPR
#endif // #ifndef SPROUT_CONFIG_DISABLE_CONSTEXPR
//
// SPROUT_CXX14_CONSTEXPR
//
#define SPROUT_CXX14_CONSTEXPR
//
// SPROUT_DEFAULTED_DEFAULT_CONSTRUCTOR_DECL
// SPROUT_DEFAULTED_DESTRUCTOR_DECL

457
sprout/forward_clist.hpp Normal file
View file

@ -0,0 +1,457 @@
#ifndef SPROUT_FORWARD_CLIST_HPP
#define SPROUT_FORWARD_CLIST_HPP
#include <cstddef>
#include <iterator>
#include <limits>
#include <sprout/config.hpp>
#include <sprout/utility/move.hpp>
#include <sprout/utility/swap.hpp>
#include <sprout/utility/value_holder/value_holder.hpp>
#include <sprout/utility/value_holder/get.hpp>
namespace sprout {
//
// forward_clist
//
template<typename T>
class forward_clist;
namespace detail {
template<typename List>
class forward_item_iterator
: public std::iterator<
std::forward_iterator_tag,
typename List::value_type,
typename List::difference_type,
typename std::conditional<
std::is_const<typename std::remove_reference<List>::type>::value,
typename List::const_pointer,
typename List::pointer
>::type,
typename std::conditional<
std::is_const<typename std::remove_reference<List>::type>::value,
typename List::const_reference,
typename List::reference
>::type
>
{
template<typename T>
friend class sprout::forward_clist;
public:
typedef List list_type;
typedef typename std::conditional<
std::is_reference<list_type>::value,
typename std::remove_reference<list_type>::type const&,
typename std::remove_reference<list_type>::type const
>::type const_list_type;
private:
typedef std::iterator<
std::forward_iterator_tag,
typename List::value_type,
typename List::difference_type,
typename std::conditional<
std::is_const<typename std::remove_reference<List>::type>::value,
typename List::const_pointer,
typename List::pointer
>::type,
typename std::conditional<
std::is_const<typename std::remove_reference<List>::type>::value,
typename List::const_reference,
typename List::reference
>::type
> base_type;
typedef typename std::remove_reference<list_type>::type::item_holder_type item_holder_type;
public:
typedef typename base_type::iterator_category iterator_category;
typedef typename base_type::value_type value_type;
typedef typename base_type::difference_type difference_type;
typedef typename base_type::pointer pointer;
typedef typename base_type::reference reference;
private:
item_holder_type item;
private:
explicit SPROUT_CONSTEXPR forward_item_iterator(item_holder_type const& p)
: item(p)
{}
public:
SPROUT_CONSTEXPR forward_item_iterator()
: item()
{}
forward_item_iterator(forward_item_iterator const&) = default;
operator forward_item_iterator<const_list_type>() const {
return forward_item_iterator<const_list_type>(item);
}
SPROUT_CONSTEXPR forward_item_iterator next() const {
return forward_item_iterator(item->next);
}
void swap(forward_item_iterator& other)
SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(sprout::swap(item, other.item)))
{
sprout::swap(item, other.item);
}
SPROUT_CONSTEXPR reference operator*() const {
return item->get();
}
SPROUT_CONSTEXPR pointer operator->() const {
return item->get_pointer();
}
forward_item_iterator& operator++() {
forward_item_iterator temp(next());
temp.swap(*this);
return *this;
}
forward_item_iterator operator++(int) {
forward_item_iterator result(*this);
++*this;
return result;
}
};
template<typename List1, typename List2>
inline SPROUT_CONSTEXPR typename std::enable_if<
std::is_same<typename std::decay<List1>::type, typename std::decay<List2>::type>::value,
bool
>::type
operator==(sprout::detail::forward_item_iterator<List1> const& lhs, sprout::detail::forward_item_iterator<List2> const& rhs) {
return &*lhs == &*rhs;
}
template<typename List1, typename List2>
inline SPROUT_CONSTEXPR typename std::enable_if<
std::is_same<typename std::decay<List1>::type, typename std::decay<List2>::type>::value,
bool
>::type
operator!=(sprout::detail::forward_item_iterator<List1> const& lhs, sprout::detail::forward_item_iterator<List2> const& rhs) {
return !(lhs == rhs);
}
template<typename List>
inline void
swap(sprout::detail::forward_item_iterator<List>& lhs, sprout::detail::forward_item_iterator<List>& rhs)
SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(lhs.swap(rhs)))
{
lhs.swap(rhs);
}
template<typename List>
inline SPROUT_CONSTEXPR sprout::detail::forward_item_iterator<List>
iterator_next(sprout::detail::forward_item_iterator<List> const& it) {
return it.next();
}
} // namespace detail
//
// forward_clist
//
template<typename T>
class forward_clist {
template<typename List>
friend class sprout::detail::forward_item_iterator;
public:
// types:
typedef T value_type;
typedef value_type& reference;
typedef value_type const& const_reference;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
typedef value_type* pointer;
typedef value_type const* const_pointer;
typedef sprout::detail::forward_item_iterator<forward_clist> iterator;
typedef sprout::detail::forward_item_iterator<forward_clist const> const_iterator;
public:
class item;
private:
typedef sprout::value_holder<item&> item_holder_type;
public:
//
// item
//
class item {
friend class forward_clist;
template<typename List>
friend class sprout::detail::forward_item_iterator;
private:
typedef sprout::value_holder<typename forward_clist::value_type> holder_type;
typedef sprout::value_holder<item&> item_holder_type;
public:
typedef typename holder_type::value_type value_type;
typedef typename holder_type::lvalue_reference lvalue_reference;
typedef typename holder_type::rvalue_reference rvalue_reference;
typedef typename holder_type::reference reference;
typedef typename holder_type::const_lvalue_reference const_lvalue_reference;
typedef typename holder_type::const_rvalue_reference const_rvalue_reference;
typedef typename holder_type::const_reference const_reference;
typedef typename holder_type::pointer pointer;
typedef typename holder_type::const_pointer const_pointer;
typedef typename holder_type::lvalue_reference_type lvalue_reference_type;
typedef typename holder_type::rvalue_reference_type rvalue_reference_type;
typedef typename holder_type::reference_type reference_type;
typedef typename holder_type::reference_const_type reference_const_type;
typedef typename holder_type::pointer_type pointer_type;
typedef typename holder_type::pointer_const_type pointer_const_type;
public:
static SPROUT_CONSTEXPR reference_type get(item& t) SPROUT_NOEXCEPT {
return sprout::get(t.val);
}
static SPROUT_CONSTEXPR rvalue_reference_type get(item&& t) SPROUT_NOEXCEPT {
return static_cast<rvalue_reference_type>(get(t));
}
static SPROUT_CONSTEXPR reference_const_type get(item const& t) SPROUT_NOEXCEPT {
return sprout::get(t.val);
}
static SPROUT_CONSTEXPR pointer_type get_pointer(item& t) SPROUT_NOEXCEPT {
return sprout::get_pointer(t.val);
}
static SPROUT_CONSTEXPR pointer_type get_pointer(item&& t) SPROUT_NOEXCEPT {
return get_pointer(t);
}
static SPROUT_CONSTEXPR pointer_const_type get_pointer(item const& t) SPROUT_NOEXCEPT {
return sprout::get_pointer(t.val);
}
private:
holder_type val;
item_holder_type next;
private:
SPROUT_CONSTEXPR item(item const&) = default;
SPROUT_CONSTEXPR item(typename holder_type::argument_type p, item_holder_type const& n)
: val(p)
, next(n)
{}
SPROUT_CONSTEXPR item(typename holder_type::movable_argument_type p, item_holder_type const& n)
: val(sprout::move(p))
, next(n)
{}
item& operator=(item const&) = default;
item& operator=(item&&) = default;
void swap(item& other)
SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(sprout::swap(val, other.val)) && SPROUT_NOEXCEPT_EXPR(sprout::swap(next, other.next)))
{
sprout::swap(val, other.val);
sprout::swap(next, other.next);
}
void clear() {
if (next.is_initialized()) {
(*next).clear();
{
item_holder_type temp;
temp.swap(next);
}
}
}
void remove() {
item_holder_type temp;
temp.swap(next);
}
public:
SPROUT_CONSTEXPR item() SPROUT_NOEXCEPT
: val(), next()
{}
SPROUT_CONSTEXPR item(item&&) = default;
SPROUT_CONSTEXPR item(typename holder_type::argument_type p)
: val(p)
, next()
{}
SPROUT_CONSTEXPR item(typename holder_type::movable_argument_type p)
: val(sprout::move(p)), next()
{}
item& operator=(typename holder_type::argument_type p) {
item temp(p, next);
temp.swap(p);
return *this;
}
item& operator=(typename holder_type::movable_argument_type p) {
item temp(sprout::move(p), next);
temp.swap(p);
return *this;
}
pointer_type operator->() {
return get_pointer();
}
SPROUT_CONSTEXPR pointer_const_type operator->() const {
return get_pointer();
}
pointer_type get_pointer() {
return val.get_pointer();
}
SPROUT_CONSTEXPR pointer_const_type get_pointer() const {
return val.get_pointer();
}
reference_type operator*() {
return get();
}
SPROUT_CONSTEXPR reference_const_type operator*() const {
return get();
}
reference_type get() {
return val.get();
}
SPROUT_CONSTEXPR reference_const_type get() const {
return val.get();
}
};
private:
item fst;
public:
// construct/copy/destroy:
SPROUT_CONSTEXPR forward_clist()
: fst()
{}
template<typename InputIterator>
SPROUT_CXX14_CONSTEXPR forward_clist(InputIterator first, InputIterator last)
: fst()
{
item_holder_type* p = &fst.next;
for (; first != last; ++first) {
*p = *first;
p = &(**p).next;
}
}
SPROUT_CXX14_CONSTEXPR forward_clist(forward_clist&& x)
: fst(sprout::move(x.fst))
{}
SPROUT_CXX14_CONSTEXPR forward_clist& operator=(forward_clist&& x) {
fst = sprout::move(x.fst);
return *this;
}
template<typename InputIterator>
SPROUT_CXX14_CONSTEXPR void assign(InputIterator first, InputIterator last) {
forward_clist temp(first, last);
temp.swap(*this);
temp.clear();
}
// iterators:
SPROUT_CXX14_CONSTEXPR iterator before_begin() SPROUT_NOEXCEPT {
return iterator(item_holder_type(fst));
}
SPROUT_CONSTEXPR const_iterator before_begin() const SPROUT_NOEXCEPT {
return const_iterator(item_holder_type(fst));
}
SPROUT_CXX14_CONSTEXPR iterator begin() SPROUT_NOEXCEPT {
return iterator(fst.next);
}
SPROUT_CONSTEXPR const_iterator begin() const SPROUT_NOEXCEPT {
return const_iterator(fst.next);
}
SPROUT_CXX14_CONSTEXPR iterator end() SPROUT_NOEXCEPT {
return iterator();
}
SPROUT_CONSTEXPR const_iterator end() const SPROUT_NOEXCEPT {
return const_iterator();
}
SPROUT_CONSTEXPR const_iterator cbegin() const SPROUT_NOEXCEPT {
return const_iterator(fst.next);
}
SPROUT_CONSTEXPR const_iterator cbefore_begin() const SPROUT_NOEXCEPT{
return const_iterator(fst.next);
}
SPROUT_CONSTEXPR const_iterator cend() const SPROUT_NOEXCEPT {
return const_iterator();
}
// capacity:
SPROUT_CONSTEXPR bool empty() const SPROUT_NOEXCEPT {
return !!fst.next;
}
SPROUT_CONSTEXPR size_type max_size() const SPROUT_NOEXCEPT {
return std::numeric_limits<size_type>::max();
}
// element access:
SPROUT_CXX14_CONSTEXPR reference front() {
return fst.next->get();
}
SPROUT_CONSTEXPR const_reference front() const {
return fst.next->get();
}
// modifiers:
SPROUT_CXX14_CONSTEXPR void push_front(item& x) {
item_holder_type nxt(x);
(*nxt).next = sprout::move(fst.next);
fst.next = sprout::move(nxt);
}
template<typename InputIterator>
SPROUT_CXX14_CONSTEXPR void push_front(InputIterator first, InputIterator last) {
item_holder_type nxt(fst.next);
item_holder_type* p = &fst.next;
for (; first != last; ++first) {
*p = *first;
p = &(**p).next;
}
*p = nxt;
}
SPROUT_CXX14_CONSTEXPR void pop_front() {
item_holder_type nxt(sprout::move(fst.next));
fst.next = fst.next->next;
nxt->remove();
}
SPROUT_CXX14_CONSTEXPR void pop(item& x) {
for (iterator first = before_begin(), last = end(); first != last; ++first) {
iterator nxt = first.next();
if (nxt.item.get_pointer() == &x) {
first.item->next = sprout::move(nxt.item->next);
nxt.item->remove();
break;
}
}
}
template<typename InputIterator>
SPROUT_CXX14_CONSTEXPR void pop(InputIterator first, InputIterator last) {
for (; first != last; ++first) {
pop(*first);
}
}
};
//
// get
//
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::forward_clist<T>::item::reference_type
get(typename sprout::forward_clist<T>::item& x) {
return sprout::forward_clist<T>::item::get(x);
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::forward_clist<T>::item::rvalue_reference
get(typename sprout::forward_clist<T>::item&& x) {
return sprout::forward_clist<T>::item::get(sprout::move(x));
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::forward_clist<T>::item::reference_const_type
get(typename sprout::forward_clist<T>::item const& x) {
return sprout::forward_clist<T>::item::get(x);
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::forward_clist<T>::item::pointer_type
get(typename sprout::forward_clist<T>::item* x) {
return sprout::forward_clist<T>::item::get_pointer(*x);
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::forward_clist<T>::item::pointer_const_type
get(typename sprout::forward_clist<T>::item const* x) {
return sprout::forward_clist<T>::item::get_pointer(*x);
}
//
// get_pointer
//
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::forward_clist<T>::item::pointer_type
get_pointer(typename sprout::forward_clist<T>::item& x) {
return sprout::forward_clist<T>::item::get_pointer(x);
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::forward_clist<T>::item::pointer_type
get_pointer(typename sprout::forward_clist<T>::item&& x) {
return sprout::forward_clist<T>::item::get_pointer(sprout::move(x));
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::forward_clist<T>::item::pointer_const_type
get_pointer(typename sprout::forward_clist<T>::item const& x) {
return sprout::forward_clist<T>::item::get_pointer(x);
}
} // namespace sprout
#endif // #ifndef SPROUT_FORWARD_CLIST_HPP

8
sprout/utility/value_holder/value_holder.hpp
View file

@ -225,13 +225,13 @@ namespace sprout {
value_holder& operator=(value_holder const&) = default;
value_holder& operator=(value_holder&&) = default;
value_holder& operator=(argument_type p) {
value_holder temp(helper_type::hold(p));
temp.swap(p);
value_holder temp(p);
temp.swap(*this);
return *this;
}
value_holder& operator=(movable_argument_type p) {
value_holder temp(helper_type::hold(sprout::move(p)));
temp.swap(p);
value_holder temp(sprout::move(p));
temp.swap(*this);
return *this;
}