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Fix a strict aliasing violation in map and unordered_map. 

These containers type-punned between pair<K, V> and pair<const K, V> as an
optimization. This commit instead provides access to the pair via a pair of
references that assign through to the underlying object. It's still undefined to
mutate a const object, but clang doesn't optimize on this for data members, so
this should be safe.

Differential revision: https://reviews.llvm.org/D47607

llvm-svn: 333948
This commit is contained in:
Erik Pilkington 2018-06-04 20:38:23 +00:00
parent ba81d7f1eb
commit f52318b47b
4 changed files with 177 additions and 89 deletions
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16
libcxx/include/__hash_table
View File

@ -32,13 +32,8 @@ _LIBCPP_PUSH_MACROS
_LIBCPP_BEGIN_NAMESPACE_STD
#ifndef _LIBCPP_CXX03_LANG
template <class _Key, class _Tp>
union __hash_value_type;
#else
template <class _Key, class _Tp>
struct __hash_value_type;
#endif
template <class _Key, class _Cp, class _Hash,
bool = is_empty<_Hash>::value && !__libcpp_is_final<_Hash>::value>
@ -172,7 +167,7 @@ struct __hash_key_value_types {
}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
static __container_value_type&& __move(__node_value_type& __v) {
static __container_value_type&& __move(__node_value_type& __v) {
return _VSTD::move(__v);
}
#endif
@ -184,7 +179,6 @@ struct __hash_key_value_types<__hash_value_type<_Key, _Tp> > {
typedef _Tp mapped_type;
typedef __hash_value_type<_Key, _Tp> __node_value_type;
typedef pair<const _Key, _Tp> __container_value_type;
typedef pair<_Key, _Tp> __nc_value_type;
typedef __container_value_type __map_value_type;
static const bool __is_map = true;
@ -198,7 +192,7 @@ struct __hash_key_value_types<__hash_value_type<_Key, _Tp> > {
static typename enable_if<__is_same_uncvref<_Up, __node_value_type>::value,
__container_value_type const&>::type
__get_value(_Up& __t) {
return __t.__cc;
return __t.__get_value();
}
template <class _Up>
@ -211,12 +205,12 @@ struct __hash_key_value_types<__hash_value_type<_Key, _Tp> > {
_LIBCPP_INLINE_VISIBILITY
static __container_value_type* __get_ptr(__node_value_type& __n) {
return _VSTD::addressof(__n.__cc);
return _VSTD::addressof(__n.__get_value());
}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
static __nc_value_type&& __move(__node_value_type& __v) {
return _VSTD::move(__v.__nc);
static pair<key_type&&, mapped_type&&> __move(__node_value_type& __v) {
return __v.__move();
}
#endif

19
libcxx/include/__tree
View File

@ -37,13 +37,8 @@ template <class _Pointer> class __tree_end_node;
template <class _VoidPtr> class __tree_node_base;
template <class _Tp, class _VoidPtr> class __tree_node;
#ifndef _LIBCPP_CXX03_LANG
template <class _Key, class _Value>
union __value_type;
#else
template <class _Key, class _Value>
struct __value_type;
#endif
template <class _Key, class _CP, class _Compare,
bool = is_empty<_Compare>::value && !__libcpp_is_final<_Compare>::value>
@ -569,10 +564,9 @@ struct __tree_key_value_types {
static __container_value_type* __get_ptr(__node_value_type& __n) {
return _VSTD::addressof(__n);
}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
static __container_value_type&& __move(__node_value_type& __v) {
static __container_value_type&& __move(__node_value_type& __v) {
return _VSTD::move(__v);
}
#endif
@ -584,14 +578,13 @@ struct __tree_key_value_types<__value_type<_Key, _Tp> > {
typedef _Tp mapped_type;
typedef __value_type<_Key, _Tp> __node_value_type;
typedef pair<const _Key, _Tp> __container_value_type;
typedef pair<_Key, _Tp> __nc_value_type;
typedef __container_value_type __map_value_type;
static const bool __is_map = true;
_LIBCPP_INLINE_VISIBILITY
static key_type const&
__get_key(__node_value_type const& __t) {
return __t.__cc.first;
return __t.__get_value().first;
}
template <class _Up>
@ -605,7 +598,7 @@ struct __tree_key_value_types<__value_type<_Key, _Tp> > {
_LIBCPP_INLINE_VISIBILITY
static __container_value_type const&
__get_value(__node_value_type const& __t) {
return __t.__cc;
return __t.__get_value();
}
template <class _Up>
@ -618,13 +611,13 @@ struct __tree_key_value_types<__value_type<_Key, _Tp> > {
_LIBCPP_INLINE_VISIBILITY
static __container_value_type* __get_ptr(__node_value_type& __n) {
return _VSTD::addressof(__n.__cc);
return _VSTD::addressof(__n.__get_value());
}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
static __nc_value_type&& __move(__node_value_type& __v) {
return _VSTD::move(__v.__nc);
static pair<key_type&&, mapped_type&&> __move(__node_value_type& __v) {
return __v.__move();
}
#endif
};

119
libcxx/include/map
View File

@ -470,13 +470,13 @@ public:
const _Compare& key_comp() const _NOEXCEPT {return *this;}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _CP& __x, const _CP& __y) const
{return static_cast<const _Compare&>(*this)(__x.__cc.first, __y.__cc.first);}
{return static_cast<const _Compare&>(*this)(__x.__get_value().first, __y.__get_value().first);}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _CP& __x, const _Key& __y) const
{return static_cast<const _Compare&>(*this)(__x.__cc.first, __y);}
{return static_cast<const _Compare&>(*this)(__x.__get_value().first, __y);}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _Key& __x, const _CP& __y) const
{return static_cast<const _Compare&>(*this)(__x, __y.__cc.first);}
{return static_cast<const _Compare&>(*this)(__x, __y.__get_value().first);}
void swap(__map_value_compare&__y)
_NOEXCEPT_(__is_nothrow_swappable<_Compare>::value)
{
@ -489,13 +489,13 @@ public:
_LIBCPP_INLINE_VISIBILITY
typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
operator () ( const _K2& __x, const _CP& __y ) const
{return static_cast<const _Compare&>(*this) (__x, __y.__cc.first);}
{return static_cast<const _Compare&>(*this) (__x, __y.__get_value().first);}
template <typename _K2>
_LIBCPP_INLINE_VISIBILITY
typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
operator () (const _CP& __x, const _K2& __y) const
{return static_cast<const _Compare&>(*this) (__x.__cc.first, __y);}
{return static_cast<const _Compare&>(*this) (__x.__get_value().first, __y);}
#endif
};
@ -518,13 +518,13 @@ public:
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _CP& __x, const _CP& __y) const
{return comp(__x.__cc.first, __y.__cc.first);}
{return comp(__x.__get_value().first, __y.__get_value().first);}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _CP& __x, const _Key& __y) const
{return comp(__x.__cc.first, __y);}
{return comp(__x.__get_value().first, __y);}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _Key& __x, const _CP& __y) const
{return comp(__x, __y.__cc.first);}
{return comp(__x, __y.__get_value().first);}
void swap(__map_value_compare&__y)
_NOEXCEPT_(__is_nothrow_swappable<_Compare>::value)
{
@ -537,13 +537,13 @@ public:
_LIBCPP_INLINE_VISIBILITY
typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
operator () ( const _K2& __x, const _CP& __y ) const
{return comp (__x, __y.__cc.first);}
{return comp (__x, __y.__get_value().first);}
template <typename _K2>
_LIBCPP_INLINE_VISIBILITY
typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
operator () (const _CP& __x, const _K2& __y) const
{return comp (__x.__cc.first, __y);}
{return comp (__x.__get_value().first, __y);}
#endif
};
@ -597,9 +597,9 @@ public:
void operator()(pointer __p) _NOEXCEPT
{
if (__second_constructed)
__alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__cc.second));
__alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__get_value().second));
if (__first_constructed)
__alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__cc.first));
__alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__get_value().first));
if (__p)
__alloc_traits::deallocate(__na_, __p, 1);
}
@ -614,23 +614,67 @@ template <class _TreeIterator> class __map_const_iterator;
#ifndef _LIBCPP_CXX03_LANG
template <class _Key, class _Tp>
union __value_type
struct __value_type
{
typedef _Key key_type;
typedef _Tp mapped_type;
typedef pair<const key_type, mapped_type> value_type;
typedef pair<key_type, mapped_type> __nc_value_type;
typedef pair<key_type&, mapped_type&> __nc_ref_pair_type;
typedef pair<key_type&&, mapped_type&&> __nc_rref_pair_type;
private:
value_type __cc;
__nc_value_type __nc;
public:
_LIBCPP_INLINE_VISIBILITY
value_type& __get_value()
{
#if _LIBCPP_STD_VER > 14
return *_VSTD::launder(_VSTD::addressof(__cc));
#else
return __cc;
#endif
}
_LIBCPP_INLINE_VISIBILITY
const value_type& __get_value() const
{
#if _LIBCPP_STD_VER > 14
return *_VSTD::launder(_VSTD::addressof(__cc));
#else
return __cc;
#endif
}
_LIBCPP_INLINE_VISIBILITY
__nc_ref_pair_type __ref()
{
value_type& __v = __get_value();
return __nc_ref_pair_type(const_cast<key_type&>(__v.first), __v.second);
}
_LIBCPP_INLINE_VISIBILITY
__nc_rref_pair_type __move()
{
value_type& __v = __get_value();
return __nc_rref_pair_type(
_VSTD::move(const_cast<key_type&>(__v.first)),
_VSTD::move(__v.second));
}
_LIBCPP_INLINE_VISIBILITY
__value_type& operator=(const __value_type& __v)
{__nc = __v.__cc; return *this;}
{
__ref() = __v.__get_value();
return *this;
}
_LIBCPP_INLINE_VISIBILITY
__value_type& operator=(__value_type&& __v)
{__nc = _VSTD::move(__v.__nc); return *this;}
{
__ref() = __v.__move();
return *this;
}
template <class _ValueTp,
class = typename enable_if<
@ -638,8 +682,10 @@ union __value_type
>::type
>
_LIBCPP_INLINE_VISIBILITY
__value_type& operator=(_ValueTp&& __v) {
__nc = _VSTD::forward<_ValueTp>(__v); return *this;
__value_type& operator=(_ValueTp&& __v)
{
__ref() = _VSTD::forward<_ValueTp>(__v);
return *this;
}
private:
@ -658,8 +704,15 @@ struct __value_type
typedef _Tp mapped_type;
typedef pair<const key_type, mapped_type> value_type;
private:
value_type __cc;
public:
_LIBCPP_INLINE_VISIBILITY
value_type& __get_value() { return __cc; }
_LIBCPP_INLINE_VISIBILITY
const value_type& __get_value() const { return __cc; }
private:
__value_type();
__value_type(__value_type const&);
@ -701,9 +754,9 @@ public:
__map_iterator(_TreeIterator __i) _NOEXCEPT : __i_(__i) {}
_LIBCPP_INLINE_VISIBILITY
reference operator*() const {return __i_->__cc;}
reference operator*() const {return __i_->__get_value();}
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__get_value());}
_LIBCPP_INLINE_VISIBILITY
__map_iterator& operator++() {++__i_; return *this;}
@ -764,9 +817,9 @@ public:
: __i_(__i.__i_) {}
_LIBCPP_INLINE_VISIBILITY
reference operator*() const {return __i_->__cc;}
reference operator*() const {return __i_->__get_value();}
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__get_value());}
_LIBCPP_INLINE_VISIBILITY
__map_const_iterator& operator++() {++__i_; return *this;}
@ -809,7 +862,6 @@ public:
typedef _Key key_type;
typedef _Tp mapped_type;
typedef pair<const key_type, mapped_type> value_type;
typedef pair<key_type, mapped_type> __nc_value_type;
typedef _Compare key_compare;
typedef _Allocator allocator_type;
typedef value_type& reference;
@ -1308,7 +1360,7 @@ map<_Key, _Tp, _Compare, _Allocator>::map(map&& __m, const allocator_type& __a)
const_iterator __e = cend();
while (!__m.empty())
__tree_.__insert_unique(__e.__i_,
_VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_.__nc));
__m.__tree_.remove(__m.begin().__i_)->__value_.__move());
}
}
@ -1319,7 +1371,7 @@ map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k)
return __tree_.__emplace_unique_key_args(__k,
_VSTD::piecewise_construct,
_VSTD::forward_as_tuple(__k),
_VSTD::forward_as_tuple()).first->__cc.second;
_VSTD::forward_as_tuple()).first->__get_value().second;
}
template <class _Key, class _Tp, class _Compare, class _Allocator>
@ -1329,7 +1381,7 @@ map<_Key, _Tp, _Compare, _Allocator>::operator[](key_type&& __k)
return __tree_.__emplace_unique_key_args(__k,
_VSTD::piecewise_construct,
_VSTD::forward_as_tuple(_VSTD::move(__k)),
_VSTD::forward_as_tuple()).first->__cc.second;
_VSTD::forward_as_tuple()).first->__get_value().second;
}
#else // _LIBCPP_CXX03_LANG
@ -1340,9 +1392,9 @@ map<_Key, _Tp, _Compare, _Allocator>::__construct_node_with_key(const key_type&
{
__node_allocator& __na = __tree_.__node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first), __k);
__node_traits::construct(__na, _VSTD::addressof(__h->__value_.__get_value().first), __k);
__h.get_deleter().__first_constructed = true;
__node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
__node_traits::construct(__na, _VSTD::addressof(__h->__value_.__get_value().second));
__h.get_deleter().__second_constructed = true;
return _LIBCPP_EXPLICIT_MOVE(__h); // explicitly moved for C++03
}
@ -1360,7 +1412,7 @@ map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k)
__tree_.__insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
__r = __h.release();
}
return __r->__value_.__cc.second;
return __r->__value_.__get_value().second;
}
#endif // _LIBCPP_CXX03_LANG
@ -1375,7 +1427,7 @@ map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k)
if (__child == nullptr)
throw out_of_range("map::at: key not found");
#endif // _LIBCPP_NO_EXCEPTIONS
return static_cast<__node_pointer>(__child)->__value_.__cc.second;
return static_cast<__node_pointer>(__child)->__value_.__get_value().second;
}
template <class _Key, class _Tp, class _Compare, class _Allocator>
@ -1388,7 +1440,7 @@ map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k) const
if (__child == nullptr)
throw out_of_range("map::at: key not found");
#endif // _LIBCPP_NO_EXCEPTIONS
return static_cast<__node_pointer>(__child)->__value_.__cc.second;
return static_cast<__node_pointer>(__child)->__value_.__get_value().second;
}
@ -1465,7 +1517,6 @@ public:
typedef _Key key_type;
typedef _Tp mapped_type;
typedef pair<const key_type, mapped_type> value_type;
typedef pair<key_type, mapped_type> __nc_value_type;
typedef _Compare key_compare;
typedef _Allocator allocator_type;
typedef value_type& reference;
@ -1852,7 +1903,7 @@ multimap<_Key, _Tp, _Compare, _Allocator>::multimap(multimap&& __m, const alloca
const_iterator __e = cend();
while (!__m.empty())
__tree_.__insert_multi(__e.__i_,
_VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_.__nc));
_VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_.__move()));
}
}
#endif

112
libcxx/include/unordered_map
View File

@ -396,7 +396,7 @@ public:
const _Hash& hash_function() const _NOEXCEPT {return *this;}
_LIBCPP_INLINE_VISIBILITY
size_t operator()(const _Cp& __x) const
{return static_cast<const _Hash&>(*this)(__x.__cc.first);}
{return static_cast<const _Hash&>(*this)(__x.__get_value().first);}
_LIBCPP_INLINE_VISIBILITY
size_t operator()(const _Key& __x) const
{return static_cast<const _Hash&>(*this)(__x);}
@ -425,7 +425,7 @@ public:
const _Hash& hash_function() const _NOEXCEPT {return __hash_;}
_LIBCPP_INLINE_VISIBILITY
size_t operator()(const _Cp& __x) const
{return __hash_(__x.__cc.first);}
{return __hash_(__x.__get_value().first);}
_LIBCPP_INLINE_VISIBILITY
size_t operator()(const _Key& __x) const
{return __hash_(__x);}
@ -464,13 +464,13 @@ public:
const _Pred& key_eq() const _NOEXCEPT {return *this;}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _Cp& __x, const _Cp& __y) const
{return static_cast<const _Pred&>(*this)(__x.__cc.first, __y.__cc.first);}
{return static_cast<const _Pred&>(*this)(__x.__get_value().first, __y.__get_value().first);}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _Cp& __x, const _Key& __y) const
{return static_cast<const _Pred&>(*this)(__x.__cc.first, __y);}
{return static_cast<const _Pred&>(*this)(__x.__get_value().first, __y);}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _Key& __x, const _Cp& __y) const
{return static_cast<const _Pred&>(*this)(__x, __y.__cc.first);}
{return static_cast<const _Pred&>(*this)(__x, __y.__get_value().first);}
void swap(__unordered_map_equal&__y)
_NOEXCEPT_(__is_nothrow_swappable<_Pred>::value)
{
@ -496,13 +496,13 @@ public:
const _Pred& key_eq() const _NOEXCEPT {return __pred_;}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _Cp& __x, const _Cp& __y) const
{return __pred_(__x.__cc.first, __y.__cc.first);}
{return __pred_(__x.__get_value().first, __y.__get_value().first);}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _Cp& __x, const _Key& __y) const
{return __pred_(__x.__cc.first, __y);}
{return __pred_(__x.__get_value().first, __y);}
_LIBCPP_INLINE_VISIBILITY
bool operator()(const _Key& __x, const _Cp& __y) const
{return __pred_(__x, __y.__cc.first);}
{return __pred_(__x, __y.__get_value().first);}
void swap(__unordered_map_equal&__y)
_NOEXCEPT_(__is_nothrow_swappable<_Pred>::value)
{
@ -572,9 +572,9 @@ public:
void operator()(pointer __p) _NOEXCEPT
{
if (__second_constructed)
__alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__cc.second));
__alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__get_value().second));
if (__first_constructed)
__alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__cc.first));
__alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__get_value().first));
if (__p)
__alloc_traits::deallocate(__na_, __p, 1);
}
@ -582,23 +582,67 @@ public:
#ifndef _LIBCPP_CXX03_LANG
template <class _Key, class _Tp>
union __hash_value_type
struct __hash_value_type
{
typedef _Key key_type;
typedef _Tp mapped_type;
typedef pair<const key_type, mapped_type> value_type;
typedef pair<key_type, mapped_type> __nc_value_type;
typedef pair<key_type&, mapped_type&> __nc_ref_pair_type;
typedef pair<key_type&&, mapped_type&&> __nc_rref_pair_type;
private:
value_type __cc;
__nc_value_type __nc;
public:
_LIBCPP_INLINE_VISIBILITY
value_type& __get_value()
{
#if _LIBCPP_STD_VER > 14
return *_VSTD::launder(_VSTD::addressof(__cc));
#else
return __cc;
#endif
}
_LIBCPP_INLINE_VISIBILITY
const value_type& __get_value() const
{
#if _LIBCPP_STD_VER > 14
return *_VSTD::launder(_VSTD::addressof(__cc));
#else
return __cc;
#endif
}
_LIBCPP_INLINE_VISIBILITY
__nc_ref_pair_type __ref()
{
value_type& __v = __get_value();
return __nc_ref_pair_type(const_cast<key_type&>(__v.first), __v.second);
}
_LIBCPP_INLINE_VISIBILITY
__nc_rref_pair_type __move()
{
value_type& __v = __get_value();
return __nc_rref_pair_type(
_VSTD::move(const_cast<key_type&>(__v.first)),
_VSTD::move(__v.second));
}
_LIBCPP_INLINE_VISIBILITY
__hash_value_type& operator=(const __hash_value_type& __v)
{__nc = __v.__cc; return *this;}
{
__ref() = __v.__get_value();
return *this;
}
_LIBCPP_INLINE_VISIBILITY
__hash_value_type& operator=(__hash_value_type&& __v)
{__nc = _VSTD::move(__v.__nc); return *this;}
{
__ref() = __v.__move();
return *this;
}
template <class _ValueTp,
class = typename enable_if<
@ -606,8 +650,10 @@ union __hash_value_type
>::type
>
_LIBCPP_INLINE_VISIBILITY
__hash_value_type& operator=(_ValueTp&& __v) {
__nc = _VSTD::forward<_ValueTp>(__v); return *this;
__hash_value_type& operator=(_ValueTp&& __v)
{
__ref() = _VSTD::forward<_ValueTp>(__v);
return *this;
}
private:
@ -628,8 +674,15 @@ struct __hash_value_type
typedef _Tp mapped_type;
typedef pair<const key_type, mapped_type> value_type;
private:
value_type __cc;
public:
_LIBCPP_INLINE_VISIBILITY
value_type& __get_value() { return __cc; }
_LIBCPP_INLINE_VISIBILITY
const value_type& __get_value() const { return __cc; }
private:
~__hash_value_type();
};
@ -657,9 +710,9 @@ public:
__hash_map_iterator(_HashIterator __i) _NOEXCEPT : __i_(__i) {}
_LIBCPP_INLINE_VISIBILITY
reference operator*() const {return __i_->__cc;}
reference operator*() const {return __i_->__get_value();}
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__get_value());}
_LIBCPP_INLINE_VISIBILITY
__hash_map_iterator& operator++() {++__i_; return *this;}
@ -711,9 +764,9 @@ public:
: __i_(__i.__i_) {}
_LIBCPP_INLINE_VISIBILITY
reference operator*() const {return __i_->__cc;}
reference operator*() const {return __i_->__get_value();}
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__get_value());}
_LIBCPP_INLINE_VISIBILITY
__hash_map_const_iterator& operator++() {++__i_; return *this;}
@ -750,7 +803,6 @@ public:
typedef _Pred key_equal;
typedef _Alloc allocator_type;
typedef pair<const key_type, mapped_type> value_type;
typedef pair<key_type, mapped_type> __nc_value_type;
typedef value_type& reference;
typedef const value_type& const_reference;
static_assert((is_same<value_type, typename allocator_type::value_type>::value),
@ -1298,8 +1350,8 @@ unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map(
{
iterator __i = __u.begin();
while (__u.size() != 0) {
__table_.__emplace_unique(_VSTD::move(
__u.__table_.remove((__i++).__i_)->__value_.__nc));
__table_.__emplace_unique(
__u.__table_.remove((__i++).__i_)->__value_.__move());
}
}
#if _LIBCPP_DEBUG_LEVEL >= 2
@ -1385,7 +1437,7 @@ unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](const key_type& __k)
{
return __table_.__emplace_unique_key_args(__k,
std::piecewise_construct, std::forward_as_tuple(__k),
std::forward_as_tuple()).first->__cc.second;
std::forward_as_tuple()).first->__get_value().second;
}
template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
@ -1394,7 +1446,7 @@ unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](key_type&& __k)
{
return __table_.__emplace_unique_key_args(__k,
std::piecewise_construct, std::forward_as_tuple(std::move(__k)),
std::forward_as_tuple()).first->__cc.second;
std::forward_as_tuple()).first->__get_value().second;
}
#else // _LIBCPP_CXX03_LANG
@ -1404,9 +1456,9 @@ unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::__construct_node_with_key(const
{
__node_allocator& __na = __table_.__node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first), __k);
__node_traits::construct(__na, _VSTD::addressof(__h->__value_.__get_value().first), __k);
__h.get_deleter().__first_constructed = true;
__node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
__node_traits::construct(__na, _VSTD::addressof(__h->__value_.__get_value().second));
__h.get_deleter().__second_constructed = true;
return _LIBCPP_EXPLICIT_MOVE(__h); // explicitly moved for C++03
}
@ -1500,7 +1552,6 @@ public:
typedef _Pred key_equal;
typedef _Alloc allocator_type;
typedef pair<const key_type, mapped_type> value_type;
typedef pair<key_type, mapped_type> __nc_value_type;
typedef value_type& reference;
typedef const value_type& const_reference;
static_assert((is_same<value_type, typename allocator_type::value_type>::value),
@ -1915,8 +1966,7 @@ unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_multimap(
while (__u.size() != 0)
{
__table_.__insert_multi(
_VSTD::move(__u.__table_.remove((__i++).__i_)->__value_.__nc)
);
__u.__table_.remove((__i++).__i_)->__value_.__move());
}
}
#if _LIBCPP_DEBUG_LEVEL >= 2