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ircd::util::unique_iterator: Add deref operator passthrus; minor reorg.

This commit is contained in:
Jason Volk 2023-03-16 17:23:28 -07:00
parent 43838608fd
commit 0b6669ca20
1 changed files with 98 additions and 29 deletions
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127
include/ircd/util/unique_iterator.h
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@ -32,41 +32,24 @@ template<class container,
class iterator>
struct ircd::util::unique_iterator
{
container *c;
container *c {nullptr};
iterator it;
unique_iterator(container &c, iterator it)
:c{&c}
,it{std::move(it)}
{}
operator const iterator &() const;
decltype(auto) operator->() const;
decltype(auto) operator*() const;
unique_iterator()
:c{nullptr}
{}
operator iterator &();
decltype(auto) operator->();
decltype(auto) operator*();
unique_iterator(container &c, iterator it);
unique_iterator() = default;
unique_iterator(unique_iterator &&o) noexcept;
unique_iterator(const unique_iterator &) = delete;
unique_iterator(unique_iterator &&o) noexcept
:c{std::move(o.c)}
,it{std::move(o.it)}
{
o.c = nullptr;
}
unique_iterator &operator=(unique_iterator &&o) noexcept;
unique_iterator &operator=(const unique_iterator &) = delete;
unique_iterator &operator=(unique_iterator &&o) noexcept
{
this->~unique_iterator();
c = std::move(o.c);
it = std::move(o.it);
o.c = nullptr;
return *this;
}
~unique_iterator() noexcept
{
if(c)
c->erase(it);
}
~unique_iterator() noexcept;
};
template<class container>
@ -76,3 +59,89 @@ struct ircd::util::unique_const_iterator
using iterator_type = typename container::const_iterator;
using unique_iterator<container, iterator_type>::unique_iterator;
};
template<class container,
class iterator>
inline
ircd::util::unique_iterator<container, iterator>::unique_iterator(container &c,
iterator it)
:c{&c}
,it{std::move(it)}
{}
template<class container,
class iterator>
inline
ircd::util::unique_iterator<container, iterator>::unique_iterator(unique_iterator &&o)
noexcept
:c{std::move(o.c)}
,it{std::move(o.it)}
{
o.c = nullptr;
}
template<class container,
class iterator>
inline ircd::util::unique_iterator<container, iterator> &
ircd::util::unique_iterator<container, iterator>::operator=(unique_iterator &&o)
noexcept
{
this->~unique_iterator();
c = std::move(o.c);
it = std::move(o.it);
o.c = nullptr;
return *this;
}
template<class container,
class iterator>
inline
ircd::util::unique_iterator<container, iterator>::~unique_iterator()
noexcept
{
if(c)
c->erase(it);
}
template<class container,
class iterator>
inline decltype(auto)
ircd::util::unique_iterator<container, iterator>::operator*()
{
return it.operator*();
}
template<class container,
class iterator>
inline decltype(auto)
ircd::util::unique_iterator<container, iterator>::operator->()
{
return it.operator->();
}
template<class container,
class iterator>
inline decltype(auto)
ircd::util::unique_iterator<container, iterator>::operator*()
const
{
return it.operator*();
}
template<class container,
class iterator>
inline decltype(auto)
ircd::util::unique_iterator<container, iterator>::operator->()
const
{
return it.operator->();
}
template<class container,
class iterator>
inline ircd::util::unique_iterator<container, iterator>::operator
const iterator &()
const
{
return it;
}