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include/boost/container/vector.hpp view on Meta::CPAN
holder.m_capacity = holder.m_size = 0;
}
else if(this->m_capacity < holder.m_size){
size_type const n = holder.m_size;
pointer reuse = pointer();
size_type final_cap = n;
m_start = this->allocation_command(allocate_new, n, final_cap, reuse);
m_capacity = static_cast<stored_size_type>(final_cap);
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
this->num_alloc += n != 0;
#endif
}
}
vector_alloc_holder(initial_capacity_t, pointer p, size_type n)
BOOST_NOEXCEPT_IF(dtl::is_nothrow_default_constructible<Allocator>::value)
: Allocator()
, m_start(p)
, m_size()
//n is guaranteed to fit into stored_size_type
, m_capacity(static_cast<stored_size_type>(n))
{}
template<class AllocFwd>
vector_alloc_holder(initial_capacity_t, pointer p, size_type n, BOOST_FWD_REF(AllocFwd) a)
: Allocator(::boost::forward<AllocFwd>(a))
, m_start(p)
, m_size()
, m_capacity(n)
{}
BOOST_CONTAINER_FORCEINLINE ~vector_alloc_holder() BOOST_NOEXCEPT_OR_NOTHROW
{
if(this->m_capacity){
this->deallocate(this->m_start, this->m_capacity);
}
}
BOOST_CONTAINER_FORCEINLINE pointer allocation_command(boost::container::allocation_type command,
size_type limit_size, size_type &prefer_in_recvd_out_size, pointer &reuse)
{
typedef typename dtl::version<Allocator>::type alloc_version;
return this->priv_allocation_command(alloc_version(), command, limit_size, prefer_in_recvd_out_size, reuse);
}
BOOST_CONTAINER_FORCEINLINE pointer allocate(size_type n)
{
const size_type max_alloc = allocator_traits_type::max_size(this->alloc());
const size_type max = max_alloc <= stored_size_type(-1) ? max_alloc : stored_size_type(-1);
if ( max < n )
boost::container::throw_length_error("get_next_capacity, allocator's max size reached");
return allocator_traits_type::allocate(this->alloc(), n);
}
BOOST_CONTAINER_FORCEINLINE void deallocate(const pointer &p, size_type n)
{
allocator_traits_type::deallocate(this->alloc(), p, n);
}
bool try_expand_fwd(size_type at_least)
{
//There is not enough memory, try to expand the old one
const size_type new_cap = this->capacity() + at_least;
size_type real_cap = new_cap;
pointer reuse = this->start();
bool const success = !!this->allocation_command(expand_fwd, new_cap, real_cap, reuse);
//Check for forward expansion
if(success){
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_expand_fwd;
#endif
this->capacity(real_cap);
}
return success;
}
template<class GrowthFactorType>
size_type next_capacity(size_type additional_objects) const
{
BOOST_ASSERT(additional_objects > size_type(this->m_capacity - this->m_size));
size_type max = allocator_traits_type::max_size(this->alloc());
(clamp_by_stored_size_type)(max, stored_size_type());
const size_type remaining_cap = max - size_type(this->m_capacity);
const size_type min_additional_cap = additional_objects - size_type(this->m_capacity - this->m_size);
if ( remaining_cap < min_additional_cap )
boost::container::throw_length_error("get_next_capacity, allocator's max size reached");
return GrowthFactorType()( size_type(this->m_capacity), min_additional_cap, max);
}
pointer m_start;
stored_size_type m_size;
stored_size_type m_capacity;
void swap_resources(vector_alloc_holder &x) BOOST_NOEXCEPT_OR_NOTHROW
{
boost::adl_move_swap(this->m_start, x.m_start);
boost::adl_move_swap(this->m_size, x.m_size);
boost::adl_move_swap(this->m_capacity, x.m_capacity);
}
void steal_resources(vector_alloc_holder &x) BOOST_NOEXCEPT_OR_NOTHROW
{
this->m_start = x.m_start;
this->m_size = x.m_size;
this->m_capacity = x.m_capacity;
x.m_start = pointer();
x.m_size = x.m_capacity = 0;
}
BOOST_CONTAINER_FORCEINLINE Allocator &alloc() BOOST_NOEXCEPT_OR_NOTHROW
{ return *this; }
BOOST_CONTAINER_FORCEINLINE const Allocator &alloc() const BOOST_NOEXCEPT_OR_NOTHROW
{ return *this; }
BOOST_CONTAINER_FORCEINLINE const pointer &start() const BOOST_NOEXCEPT_OR_NOTHROW
{ return m_start; }
BOOST_CONTAINER_FORCEINLINE size_type capacity() const BOOST_NOEXCEPT_OR_NOTHROW
{ return m_capacity; }
BOOST_CONTAINER_FORCEINLINE void start(const pointer &p) BOOST_NOEXCEPT_OR_NOTHROW
{ m_start = p; }
BOOST_CONTAINER_FORCEINLINE void capacity(const size_type &c) BOOST_NOEXCEPT_OR_NOTHROW
{ BOOST_ASSERT( c <= stored_size_type(-1)); m_capacity = c; }
private:
void priv_first_allocation(size_type cap)
{
if(cap){
include/boost/container/vector.hpp view on Meta::CPAN
}
vector_alloc_holder(BOOST_RV_REF(vector_alloc_holder) holder)
: Allocator(BOOST_MOVE_BASE(Allocator, holder))
, m_size(holder.m_size) //Size is initialized here so vector should only call uninitialized_xxx after this
{
::boost::container::uninitialized_move_alloc_n
(this->alloc(), boost::movelib::to_raw_pointer(holder.start()), m_size, boost::movelib::to_raw_pointer(this->start()));
}
template<class OtherAllocator, class OtherStoredSizeType, class OtherAllocatorVersion>
vector_alloc_holder(BOOST_RV_REF_BEG vector_alloc_holder<OtherAllocator, OtherStoredSizeType, OtherAllocatorVersion> BOOST_RV_REF_END holder)
: Allocator()
, m_size(holder.m_size) //Initialize it to m_size as first_allocation can only succeed or abort
{
//Different allocator type so we must check we have enough storage
const size_type n = holder.m_size;
this->priv_first_allocation(n);
::boost::container::uninitialized_move_alloc_n
(this->alloc(), boost::movelib::to_raw_pointer(holder.start()), n, boost::movelib::to_raw_pointer(this->start()));
}
BOOST_CONTAINER_FORCEINLINE void priv_first_allocation(size_type cap)
{
if(cap > Allocator::internal_capacity){
throw_bad_alloc();
}
}
BOOST_CONTAINER_FORCEINLINE void deep_swap(vector_alloc_holder &x)
{
this->priv_deep_swap(x);
}
template<class OtherAllocator, class OtherStoredSizeType, class OtherAllocatorVersion>
void deep_swap(vector_alloc_holder<OtherAllocator, OtherStoredSizeType, OtherAllocatorVersion> &x)
{
if(this->m_size > OtherAllocator::internal_capacity || x.m_size > Allocator::internal_capacity){
throw_bad_alloc();
}
this->priv_deep_swap(x);
}
BOOST_CONTAINER_FORCEINLINE void swap_resources(vector_alloc_holder &) BOOST_NOEXCEPT_OR_NOTHROW
{ //Containers with version 0 allocators can't be moved without moving elements one by one
throw_bad_alloc();
}
BOOST_CONTAINER_FORCEINLINE void steal_resources(vector_alloc_holder &)
{ //Containers with version 0 allocators can't be moved without moving elements one by one
throw_bad_alloc();
}
BOOST_CONTAINER_FORCEINLINE Allocator &alloc() BOOST_NOEXCEPT_OR_NOTHROW
{ return *this; }
BOOST_CONTAINER_FORCEINLINE const Allocator &alloc() const BOOST_NOEXCEPT_OR_NOTHROW
{ return *this; }
BOOST_CONTAINER_FORCEINLINE bool try_expand_fwd(size_type at_least)
{ return !at_least; }
BOOST_CONTAINER_FORCEINLINE pointer start() const BOOST_NOEXCEPT_OR_NOTHROW { return Allocator::internal_storage(); }
BOOST_CONTAINER_FORCEINLINE size_type capacity() const BOOST_NOEXCEPT_OR_NOTHROW { return Allocator::internal_capacity; }
stored_size_type m_size;
private:
template<class OtherAllocator, class OtherStoredSizeType, class OtherAllocatorVersion>
void priv_deep_swap(vector_alloc_holder<OtherAllocator, OtherStoredSizeType, OtherAllocatorVersion> &x)
{
const size_type MaxTmpStorage = sizeof(value_type)*Allocator::internal_capacity;
value_type *const first_this = boost::movelib::to_raw_pointer(this->start());
value_type *const first_x = boost::movelib::to_raw_pointer(x.start());
if(this->m_size < x.m_size){
boost::container::deep_swap_alloc_n<MaxTmpStorage>(this->alloc(), first_this, this->m_size, first_x, x.m_size);
}
else{
boost::container::deep_swap_alloc_n<MaxTmpStorage>(this->alloc(), first_x, x.m_size, first_this, this->m_size);
}
boost::adl_move_swap(this->m_size, x.m_size);
}
};
struct growth_factor_60;
template<class T, class Default>
struct default_if_void
{
typedef T type;
};
template<class Default>
struct default_if_void<void, Default>
{
typedef Default type;
};
template<class Options, class AllocatorSizeType>
struct get_vector_opt
{
typedef vector_opt< typename default_if_void<typename Options::growth_factor_type, growth_factor_60>::type
, typename default_if_void<typename Options::stored_size_type, AllocatorSizeType>::type
> type;
};
template<class AllocatorSizeType>
struct get_vector_opt<void, AllocatorSizeType>
{
typedef vector_opt<growth_factor_60, AllocatorSizeType> type;
};
#endif //#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
//! A vector is a sequence that supports random access to elements, constant
//! time insertion and removal of elements at the end, and linear time insertion
//! and removal of elements at the beginning or in the middle. The number of
//! elements in a vector may vary dynamically; memory management is automatic.
include/boost/container/vector.hpp view on Meta::CPAN
BOOST_MOVE_I dtl::is_not_input_iterator<InIt>
>
>::type * = 0)
)
{
//Overwrite all elements we can from [first, last)
iterator cur = this->begin();
const iterator end_it = this->end();
for ( ; first != last && cur != end_it; ++cur, ++first){
*cur = *first;
}
if (first == last){
//There are no more elements in the sequence, erase remaining
T* const end_pos = this->priv_raw_end();
const size_type n = static_cast<size_type>(end_pos - boost::movelib::iterator_to_raw_pointer(cur));
this->priv_destroy_last_n(n);
}
else{
//There are more elements in the range, insert the remaining ones
this->insert(this->cend(), first, last);
}
}
#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
//! <b>Effects</b>: Assigns the the range [il.begin(), il.end()) to *this.
//!
//! <b>Throws</b>: If memory allocation throws or
//! T's constructor from dereferencing iniializer_list iterator throws.
//!
BOOST_CONTAINER_FORCEINLINE void assign(std::initializer_list<T> il)
{
this->assign(il.begin(), il.end());
}
#endif
//! <b>Effects</b>: Assigns the the range [first, last) to *this.
//!
//! <b>Throws</b>: If memory allocation throws or T's copy/move constructor/assignment or
//! T's constructor/assignment from dereferencing InpIt throws.
//!
//! <b>Complexity</b>: Linear to n.
template <class FwdIt>
void assign(FwdIt first, FwdIt last
//Forward iterators and version > 0 allocator
BOOST_CONTAINER_DOCIGN(BOOST_MOVE_I typename dtl::disable_if_or
< void
BOOST_MOVE_I dtl::is_same<alloc_version BOOST_MOVE_I version_0>
BOOST_MOVE_I dtl::is_convertible<FwdIt BOOST_MOVE_I size_type>
BOOST_MOVE_I dtl::is_input_iterator<FwdIt>
>::type * = 0)
)
{
//For Fwd iterators the standard only requires EmplaceConstructible and assignable from *first
//so we can't do any backwards allocation
const size_type input_sz = static_cast<size_type>(boost::container::iterator_distance(first, last));
const size_type old_capacity = this->capacity();
if(input_sz > old_capacity){ //If input range is too big, we need to reallocate
size_type real_cap = 0;
pointer reuse(this->m_holder.start());
pointer const ret(this->m_holder.allocation_command(allocate_new|expand_fwd, input_sz, real_cap = input_sz, reuse));
if(!reuse){ //New allocation, just emplace new values
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_alloc;
#endif
pointer const old_p = this->m_holder.start();
if(old_p){
this->priv_destroy_all();
this->m_holder.deallocate(old_p, old_capacity);
}
this->m_holder.start(ret);
this->m_holder.capacity(real_cap);
this->m_holder.m_size = 0;
this->priv_uninitialized_construct_at_end(first, last);
return;
}
else{
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_expand_fwd;
#endif
this->m_holder.capacity(real_cap);
//Forward expansion, use assignment + back deletion/construction that comes later
}
}
boost::container::copy_assign_range_alloc_n(this->m_holder.alloc(), first, input_sz, this->priv_raw_begin(), this->size());
this->m_holder.m_size = input_sz;
}
//! <b>Effects</b>: Assigns the n copies of val to *this.
//!
//! <b>Throws</b>: If memory allocation throws or
//! T's copy/move constructor/assignment throws.
//!
//! <b>Complexity</b>: Linear to n.
BOOST_CONTAINER_FORCEINLINE void assign(size_type n, const value_type& val)
{ this->assign(cvalue_iterator(val, n), cvalue_iterator()); }
//! <b>Effects</b>: Returns a copy of the internal allocator.
//!
//! <b>Throws</b>: If allocator's copy constructor throws.
//!
//! <b>Complexity</b>: Constant.
allocator_type get_allocator() const BOOST_NOEXCEPT_OR_NOTHROW
{ return this->m_holder.alloc(); }
//! <b>Effects</b>: Returns a reference to the internal allocator.
//!
//! <b>Throws</b>: Nothing
//!
//! <b>Complexity</b>: Constant.
//!
//! <b>Note</b>: Non-standard extension.
BOOST_CONTAINER_FORCEINLINE stored_allocator_type &get_stored_allocator() BOOST_NOEXCEPT_OR_NOTHROW
{ return this->m_holder.alloc(); }
//! <b>Effects</b>: Returns a reference to the internal allocator.
//!
//! <b>Throws</b>: Nothing
//!
//! <b>Complexity</b>: Constant.
//!
//! <b>Note</b>: Non-standard extension.
BOOST_CONTAINER_FORCEINLINE const stored_allocator_type &get_stored_allocator() const BOOST_NOEXCEPT_OR_NOTHROW
{ return this->m_holder.alloc(); }
//////////////////////////////////////////////
//
// iterators
//
//////////////////////////////////////////////
//! <b>Effects</b>: Returns an iterator to the first element contained in the vector.
//!
//! <b>Throws</b>: Nothing.
//!
//! <b>Complexity</b>: Constant.
BOOST_CONTAINER_FORCEINLINE iterator begin() BOOST_NOEXCEPT_OR_NOTHROW
{ return iterator(this->m_holder.start()); }
include/boost/container/vector.hpp view on Meta::CPAN
//!
//! <b>Throws</b>: Nothing.
//!
//! <b>Complexity</b>: Constant.
T* data() BOOST_NOEXCEPT_OR_NOTHROW
{ return this->priv_raw_begin(); }
//! <b>Returns</b>: A pointer such that [data(),data() + size()) is a valid range.
//! For a non-empty vector, data() == &front().
//!
//! <b>Throws</b>: Nothing.
//!
//! <b>Complexity</b>: Constant.
const T * data() const BOOST_NOEXCEPT_OR_NOTHROW
{ return this->priv_raw_begin(); }
//////////////////////////////////////////////
//
// modifiers
//
//////////////////////////////////////////////
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
//! <b>Effects</b>: Inserts an object of type T constructed with
//! std::forward<Args>(args)... in the end of the vector.
//!
//! <b>Returns</b>: A reference to the created object.
//!
//! <b>Throws</b>: If memory allocation throws or the in-place constructor throws or
//! T's copy/move constructor throws.
//!
//! <b>Complexity</b>: Amortized constant time.
template<class ...Args>
BOOST_CONTAINER_FORCEINLINE reference emplace_back(BOOST_FWD_REF(Args)...args)
{
if (BOOST_LIKELY(this->room_enough())){
//There is more memory, just construct a new object at the end
T* const p = this->priv_raw_end();
allocator_traits_type::construct(this->m_holder.alloc(), p, ::boost::forward<Args>(args)...);
++this->m_holder.m_size;
return *p;
}
else{
typedef dtl::insert_emplace_proxy<Allocator, T*, Args...> type;
return *this->priv_forward_range_insert_no_capacity
(this->back_ptr(), 1, type(::boost::forward<Args>(args)...), alloc_version());
}
}
//! <b>Effects</b>: Inserts an object of type T constructed with
//! std::forward<Args>(args)... in the end of the vector.
//!
//! <b>Throws</b>: If the in-place constructor throws.
//!
//! <b>Complexity</b>: Constant time.
//!
//! <b>Note</b>: Non-standard extension.
template<class ...Args>
BOOST_CONTAINER_FORCEINLINE bool stable_emplace_back(BOOST_FWD_REF(Args)...args)
{
const bool is_room_enough = this->room_enough() || (alloc_version::value == 2 && this->m_holder.try_expand_fwd(1u));
if (BOOST_LIKELY(is_room_enough)){
//There is more memory, just construct a new object at the end
allocator_traits_type::construct(this->m_holder.alloc(), this->priv_raw_end(), ::boost::forward<Args>(args)...);
++this->m_holder.m_size;
}
return is_room_enough;
}
//! <b>Requires</b>: position must be a valid iterator of *this.
//!
//! <b>Effects</b>: Inserts an object of type T constructed with
//! std::forward<Args>(args)... before position
//!
//! <b>Throws</b>: If memory allocation throws or the in-place constructor throws or
//! T's copy/move constructor/assignment throws.
//!
//! <b>Complexity</b>: If position is end(), amortized constant time
//! Linear time otherwise.
template<class ...Args>
iterator emplace(const_iterator position, BOOST_FWD_REF(Args) ...args)
{
BOOST_ASSERT(this->priv_in_range_or_end(position));
//Just call more general insert(pos, size, value) and return iterator
typedef dtl::insert_emplace_proxy<Allocator, T*, Args...> type;
return this->priv_forward_range_insert( vector_iterator_get_ptr(position), 1
, type(::boost::forward<Args>(args)...));
}
#else // !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
#define BOOST_CONTAINER_VECTOR_EMPLACE_CODE(N) \
BOOST_MOVE_TMPL_LT##N BOOST_MOVE_CLASS##N BOOST_MOVE_GT##N \
BOOST_CONTAINER_FORCEINLINE reference emplace_back(BOOST_MOVE_UREF##N)\
{\
if (BOOST_LIKELY(this->room_enough())){\
T* const p = this->priv_raw_end();\
allocator_traits_type::construct (this->m_holder.alloc()\
, this->priv_raw_end() BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
++this->m_holder.m_size;\
return *p;\
}\
else{\
typedef dtl::insert_emplace_proxy_arg##N<Allocator, T* BOOST_MOVE_I##N BOOST_MOVE_TARG##N> type;\
return *this->priv_forward_range_insert_no_capacity\
( this->back_ptr(), 1, type(BOOST_MOVE_FWD##N), alloc_version());\
}\
}\
\
BOOST_MOVE_TMPL_LT##N BOOST_MOVE_CLASS##N BOOST_MOVE_GT##N \
BOOST_CONTAINER_FORCEINLINE bool stable_emplace_back(BOOST_MOVE_UREF##N)\
{\
const bool is_room_enough = this->room_enough() || (alloc_version::value == 2 && this->m_holder.try_expand_fwd(1u));\
if (BOOST_LIKELY(is_room_enough)){\
allocator_traits_type::construct (this->m_holder.alloc()\
, this->priv_raw_end() BOOST_MOVE_I##N BOOST_MOVE_FWD##N);\
++this->m_holder.m_size;\
}\
return is_room_enough;\
}\
\
BOOST_MOVE_TMPL_LT##N BOOST_MOVE_CLASS##N BOOST_MOVE_GT##N \
iterator emplace(const_iterator pos BOOST_MOVE_I##N BOOST_MOVE_UREF##N)\
{\
BOOST_ASSERT(this->priv_in_range_or_end(pos));\
typedef dtl::insert_emplace_proxy_arg##N<Allocator, T* BOOST_MOVE_I##N BOOST_MOVE_TARG##N> type;\
return this->priv_forward_range_insert(vector_iterator_get_ptr(pos), 1, type(BOOST_MOVE_FWD##N));\
}\
//
BOOST_MOVE_ITERATE_0TO9(BOOST_CONTAINER_VECTOR_EMPLACE_CODE)
#undef BOOST_CONTAINER_VECTOR_EMPLACE_CODE
#endif
#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
//! <b>Effects</b>: Inserts a copy of x at the end of the vector.
//!
//! <b>Throws</b>: If memory allocation throws or
//! T's copy/move constructor throws.
//!
//! <b>Complexity</b>: Amortized constant time.
void push_back(const T &x);
//! <b>Effects</b>: Constructs a new element in the end of the vector
//! and moves the resources of x to this new element.
//!
//! <b>Throws</b>: If memory allocation throws or
//! T's copy/move constructor throws.
//!
//! <b>Complexity</b>: Amortized constant time.
void push_back(T &&x);
#else
BOOST_MOVE_CONVERSION_AWARE_CATCH(push_back, T, void, priv_push_back)
#endif
#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
//! <b>Requires</b>: position must be a valid iterator of *this.
//!
//! <b>Effects</b>: Insert a copy of x before position.
//!
//! <b>Throws</b>: If memory allocation throws or T's copy/move constructor/assignment throws.
//!
//! <b>Complexity</b>: If position is end(), amortized constant time
//! Linear time otherwise.
iterator insert(const_iterator position, const T &x);
//! <b>Requires</b>: position must be a valid iterator of *this.
//!
//! <b>Effects</b>: Insert a new element before position with x's resources.
//!
//! <b>Throws</b>: If memory allocation throws.
//!
//! <b>Complexity</b>: If position is end(), amortized constant time
include/boost/container/vector.hpp view on Meta::CPAN
BOOST_CONTAINER_FORCEINLINE friend bool operator==(const vector& x, const vector& y)
{ return x.size() == y.size() && ::boost::container::algo_equal(x.begin(), x.end(), y.begin()); }
//! <b>Effects</b>: Returns true if x and y are unequal
//!
//! <b>Complexity</b>: Linear to the number of elements in the container.
BOOST_CONTAINER_FORCEINLINE friend bool operator!=(const vector& x, const vector& y)
{ return !(x == y); }
//! <b>Effects</b>: Returns true if x is less than y
//!
//! <b>Complexity</b>: Linear to the number of elements in the container.
friend bool operator<(const vector& x, const vector& y)
{
const_iterator first1(x.cbegin()), first2(y.cbegin());
const const_iterator last1(x.cend()), last2(y.cend());
for ( ; (first1 != last1) && (first2 != last2); ++first1, ++first2 ) {
if (*first1 < *first2) return true;
if (*first2 < *first1) return false;
}
return (first1 == last1) && (first2 != last2);
}
//! <b>Effects</b>: Returns true if x is greater than y
//!
//! <b>Complexity</b>: Linear to the number of elements in the container.
BOOST_CONTAINER_FORCEINLINE friend bool operator>(const vector& x, const vector& y)
{ return y < x; }
//! <b>Effects</b>: Returns true if x is equal or less than y
//!
//! <b>Complexity</b>: Linear to the number of elements in the container.
BOOST_CONTAINER_FORCEINLINE friend bool operator<=(const vector& x, const vector& y)
{ return !(y < x); }
//! <b>Effects</b>: Returns true if x is equal or greater than y
//!
//! <b>Complexity</b>: Linear to the number of elements in the container.
BOOST_CONTAINER_FORCEINLINE friend bool operator>=(const vector& x, const vector& y)
{ return !(x < y); }
//! <b>Effects</b>: x.swap(y)
//!
//! <b>Complexity</b>: Constant.
BOOST_CONTAINER_FORCEINLINE friend void swap(vector& x, vector& y)
{ x.swap(y); }
#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
//! <b>Effects</b>: If n is less than or equal to capacity(), this call has no
//! effect. Otherwise, it is a request for allocation of additional memory
//! (memory expansion) that will not invalidate iterators.
//! If the request is successful, then capacity() is greater than or equal to
//! n; otherwise, capacity() is unchanged. In either case, size() is unchanged.
//!
//! <b>Throws</b>: If memory allocation allocation throws or T's copy/move constructor throws.
//!
//! <b>Note</b>: Non-standard extension.
bool stable_reserve(size_type new_cap)
{
const size_type cp = this->capacity();
return cp >= new_cap || (alloc_version::value == 2 && this->m_holder.try_expand_fwd(new_cap - cp));
}
//Absolutely experimental. This function might change, disappear or simply crash!
template<class BiDirPosConstIt, class BiDirValueIt>
BOOST_CONTAINER_FORCEINLINE void insert_ordered_at(const size_type element_count, BiDirPosConstIt last_position_it, BiDirValueIt last_value_it)
{
typedef vector_insert_ordered_cursor<BiDirPosConstIt, BiDirValueIt> inserter_t;
return this->priv_insert_ordered_at(element_count, inserter_t(last_position_it, last_value_it));
}
template<class InputIt>
BOOST_CONTAINER_FORCEINLINE void merge(InputIt first, InputIt last)
{ this->merge(first, last, value_less_t()); }
template<class InputIt, class Compare>
BOOST_CONTAINER_FORCEINLINE void merge(InputIt first, InputIt last, Compare comp)
{
size_type const s = this->size();
size_type const c = this->capacity();
size_type n = 0;
size_type const free_cap = c - s;
//If not input iterator and new elements don't fit in the remaining capacity, merge in new buffer
if(!dtl::is_input_iterator<InputIt>::value &&
free_cap < (n = static_cast<size_type>(boost::container::iterator_distance(first, last)))){
this->priv_merge_in_new_buffer(first, n, comp, alloc_version());
}
else{
iterator pos(this->insert(this->cend(), first, last));
T *const raw_beg = this->priv_raw_begin();
T *const raw_end = this->priv_raw_end();
T *const raw_pos = raw_beg + s;
boost::movelib::adaptive_merge(raw_beg, raw_pos, raw_end, comp, raw_end, free_cap - n);
}
}
template<class InputIt>
BOOST_CONTAINER_FORCEINLINE void merge_unique(InputIt first, InputIt last)
{ this->merge_unique(first, last, value_less_t()); }
template<class InputIt, class Compare>
BOOST_CONTAINER_FORCEINLINE void merge_unique(InputIt first, InputIt last, Compare comp)
{
size_type const old_size = this->size();
this->priv_set_difference_back(first, last, comp);
T *const raw_beg = this->priv_raw_begin();
T *const raw_end = this->priv_raw_end();
T *raw_pos = raw_beg + old_size;
boost::movelib::adaptive_merge(raw_beg, raw_pos, raw_end, comp, raw_end, this->capacity() - this->size());
}
private:
template<class PositionValue>
void priv_insert_ordered_at(const size_type element_count, PositionValue position_value)
{
const size_type old_size_pos = this->size();
this->reserve(old_size_pos + element_count);
T* const begin_ptr = this->priv_raw_begin();
size_type insertions_left = element_count;
size_type prev_pos = old_size_pos;
size_type old_hole_size = element_count;
//Exception rollback. If any copy throws before the hole is filled, values
//already inserted/copied at the end of the buffer will be destroyed.
typename value_traits::ArrayDestructor past_hole_values_destroyer
(begin_ptr + old_size_pos + element_count, this->m_holder.alloc(), size_type(0u));
//Loop for each insertion backwards, first moving the elements after the insertion point,
//then inserting the element.
while(insertions_left){
--position_value;
size_type const pos = position_value.get_pos();
BOOST_ASSERT(pos != size_type(-1) && pos <= old_size_pos && pos <= prev_pos);
//If needed shift the range after the insertion point and the previous insertion point.
//Function will take care if the shift crosses the size() boundary, using copy/move
//or uninitialized copy/move if necessary.
size_type new_hole_size = (pos != prev_pos)
? priv_insert_ordered_at_shift_range(pos, prev_pos, this->size(), insertions_left)
: old_hole_size
;
if(new_hole_size){
//The hole was reduced by priv_insert_ordered_at_shift_range so expand exception rollback range backwards
past_hole_values_destroyer.increment_size_backwards(prev_pos - pos);
//Insert the new value in the hole
allocator_traits_type::construct(this->m_holder.alloc(), begin_ptr + pos + insertions_left - 1, position_value.get_val());
if(--new_hole_size){
//The hole was reduced by the new insertion by one
past_hole_values_destroyer.increment_size_backwards(size_type(1u));
}
else{
//Hole was just filled, disable exception rollback and change vector size
past_hole_values_destroyer.release();
this->m_holder.m_size += element_count;
}
}
else{
if(old_hole_size){
//Hole was just filled by priv_insert_ordered_at_shift_range, disable exception rollback and change vector size
past_hole_values_destroyer.release();
this->m_holder.m_size += element_count;
}
//Insert the new value in the already constructed range
begin_ptr[pos + insertions_left - 1] = position_value.get_val();
}
--insertions_left;
old_hole_size = new_hole_size;
prev_pos = pos;
}
}
template<class InputIt, class Compare>
void priv_set_difference_back(InputIt first1, InputIt last1, Compare comp)
{
T * old_first2 = this->priv_raw_begin();
T * first2 = old_first2;
T * last2 = this->priv_raw_end();
while (first1 != last1) {
if (first2 == last2){
this->insert(this->cend(), first1, last1);
return;
}
if (comp(*first1, *first2)) {
this->emplace_back(*first1);
T * const raw_begin = this->priv_raw_begin();
if(old_first2 != raw_begin)
{
//Reallocation happened, update range
first2 = raw_begin + (first2 - old_first2);
last2 = raw_begin + (last2 - old_first2);
old_first2 = raw_begin;
}
++first1;
}
else {
if (!comp(*first2, *first1)) {
++first1;
}
++first2;
}
}
include/boost/container/vector.hpp view on Meta::CPAN
this->assign( x.priv_raw_begin(), x.priv_raw_end() );
}
template<class Vector> //Template it to avoid it in explicit instantiations
void priv_swap(Vector &x, dtl::true_type) //version_0
{ this->m_holder.deep_swap(x.m_holder); }
template<class Vector> //Template it to avoid it in explicit instantiations
void priv_swap(Vector &x, dtl::false_type) //version_N
{
const bool propagate_alloc = allocator_traits_type::propagate_on_container_swap::value;
if(are_swap_propagable( this->get_stored_allocator(), this->m_holder.start()
, x.get_stored_allocator(), x.m_holder.start(), propagate_alloc)){
//Just swap internals
this->m_holder.swap_resources(x.m_holder);
}
else{
//Else swap element by element...
bool const t_smaller = this->size() < x.size();
vector &sml = t_smaller ? *this : x;
vector &big = t_smaller ? x : *this;
size_type const common_elements = sml.size();
for(size_type i = 0; i != common_elements; ++i){
boost::adl_move_swap(sml[i], big[i]);
}
//... and move-insert the remaining range
sml.insert( sml.cend()
, boost::make_move_iterator(boost::movelib::iterator_to_raw_pointer(big.nth(common_elements)))
, boost::make_move_iterator(boost::movelib::iterator_to_raw_pointer(big.end()))
);
//Destroy remaining elements
big.erase(big.nth(common_elements), big.cend());
}
//And now swap the allocator
dtl::swap_alloc(this->m_holder.alloc(), x.m_holder.alloc(), dtl::bool_<propagate_alloc>());
}
void priv_reserve_no_capacity(size_type, version_0)
{ throw_bad_alloc(); }
dtl::insert_range_proxy<Allocator, boost::move_iterator<T*>, T*> priv_dummy_empty_proxy()
{
return dtl::insert_range_proxy<Allocator, boost::move_iterator<T*>, T*>
(::boost::make_move_iterator((T *)0));
}
void priv_reserve_no_capacity(size_type new_cap, version_1)
{
//There is not enough memory, allocate a new buffer
//Pass the hint so that allocators can take advantage of this.
pointer const p = this->m_holder.allocate(new_cap);
//We will reuse insert code, so create a dummy input iterator
this->priv_forward_range_insert_new_allocation
( boost::movelib::to_raw_pointer(p), new_cap, this->priv_raw_end(), 0, this->priv_dummy_empty_proxy());
}
void priv_reserve_no_capacity(size_type new_cap, version_2)
{
//There is not enough memory, allocate a new
//buffer or expand the old one.
bool same_buffer_start;
size_type real_cap = 0;
pointer reuse(this->m_holder.start());
pointer const ret(this->m_holder.allocation_command(allocate_new | expand_fwd | expand_bwd, new_cap, real_cap = new_cap, reuse));
//Check for forward expansion
same_buffer_start = reuse && this->m_holder.start() == ret;
if(same_buffer_start){
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_expand_fwd;
#endif
this->m_holder.capacity(real_cap);
}
else{ //If there is no forward expansion, move objects, we will reuse insertion code
T * const new_mem = boost::movelib::to_raw_pointer(ret);
T * const ins_pos = this->priv_raw_end();
if(reuse){ //Backwards (and possibly forward) expansion
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_expand_bwd;
#endif
this->priv_forward_range_insert_expand_backwards
( new_mem , real_cap, ins_pos, 0, this->priv_dummy_empty_proxy());
}
else{ //New buffer
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_alloc;
#endif
this->priv_forward_range_insert_new_allocation
( new_mem, real_cap, ins_pos, 0, this->priv_dummy_empty_proxy());
}
}
}
void priv_destroy_last(const bool moved = false) BOOST_NOEXCEPT_OR_NOTHROW
{
(void)moved;
const bool skip_destructor = value_traits::trivial_dctr || (value_traits::trivial_dctr_after_move && moved);
if(!skip_destructor){
value_type* const p = this->priv_raw_end() - 1;
allocator_traits_type::destroy(this->get_stored_allocator(), p);
}
--this->m_holder.m_size;
}
void priv_destroy_last_n(const size_type n) BOOST_NOEXCEPT_OR_NOTHROW
{
BOOST_ASSERT(n <= this->m_holder.m_size);
if(!value_traits::trivial_dctr){
T* const destroy_pos = this->priv_raw_begin() + (this->m_holder.m_size-n);
boost::container::destroy_alloc_n(this->get_stored_allocator(), destroy_pos, n);
}
this->m_holder.m_size -= n;
}
template<class InpIt>
void priv_uninitialized_construct_at_end(InpIt first, InpIt last)
{
T* const old_end_pos = this->priv_raw_end();
T* const new_end_pos = boost::container::uninitialized_copy_alloc(this->m_holder.alloc(), first, last, old_end_pos);
this->m_holder.m_size += new_end_pos - old_end_pos;
}
void priv_destroy_all() BOOST_NOEXCEPT_OR_NOTHROW
{
boost::container::destroy_alloc_n
(this->get_stored_allocator(), this->priv_raw_begin(), this->m_holder.m_size);
this->m_holder.m_size = 0;
}
template<class U>
iterator priv_insert(const const_iterator &p, BOOST_FWD_REF(U) x)
{
BOOST_ASSERT(this->priv_in_range_or_end(p));
return this->priv_forward_range_insert
( vector_iterator_get_ptr(p), 1, dtl::get_insert_value_proxy<T*, Allocator>(::boost::forward<U>(x)));
}
dtl::insert_copy_proxy<Allocator, T*> priv_single_insert_proxy(const T &x)
{ return dtl::insert_copy_proxy<Allocator, T*> (x); }
dtl::insert_move_proxy<Allocator, T*> priv_single_insert_proxy(BOOST_RV_REF(T) x)
include/boost/container/vector.hpp view on Meta::CPAN
const size_type cp = this->m_holder.capacity();
if(cp){
const size_type sz = this->size();
if(!sz){
this->m_holder.deallocate(this->m_holder.m_start, cp);
this->m_holder.m_start = pointer();
this->m_holder.m_capacity = 0;
}
else if(sz < cp){
//Allocate a new buffer.
//Pass the hint so that allocators can take advantage of this.
pointer const p = this->m_holder.allocate(sz);
//We will reuse insert code, so create a dummy input iterator
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_alloc;
#endif
this->priv_forward_range_insert_new_allocation
( boost::movelib::to_raw_pointer(p), sz
, this->priv_raw_begin(), 0, this->priv_dummy_empty_proxy());
}
}
}
void priv_shrink_to_fit(version_2) BOOST_NOEXCEPT_OR_NOTHROW
{
const size_type cp = this->m_holder.capacity();
if(cp){
const size_type sz = this->size();
if(!sz){
this->m_holder.deallocate(this->m_holder.m_start, cp);
this->m_holder.m_start = pointer();
this->m_holder.m_capacity = 0;
}
else{
size_type received_size = sz;
pointer reuse(this->m_holder.start());
if(this->m_holder.allocation_command
(shrink_in_place | nothrow_allocation, cp, received_size, reuse)){
this->m_holder.capacity(received_size);
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_shrink;
#endif
}
}
}
}
template <class InsertionProxy>
iterator priv_forward_range_insert_no_capacity
(const pointer &pos, const size_type, const InsertionProxy , version_0)
{
throw_bad_alloc();
return iterator(pos);
}
template <class InsertionProxy>
iterator priv_forward_range_insert_no_capacity
(const pointer &pos, const size_type n, const InsertionProxy insert_range_proxy, version_1)
{
//Check if we have enough memory or try to expand current memory
const size_type n_pos = pos - this->m_holder.start();
T *const raw_pos = boost::movelib::to_raw_pointer(pos);
const size_type new_cap = this->m_holder.template next_capacity<growth_factor_type>(n);
//Pass the hint so that allocators can take advantage of this.
T * const new_buf = boost::movelib::to_raw_pointer(this->m_holder.allocate(new_cap));
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_alloc;
#endif
this->priv_forward_range_insert_new_allocation
( new_buf, new_cap, raw_pos, n, insert_range_proxy);
return iterator(this->m_holder.start() + n_pos);
}
template <class InsertionProxy>
iterator priv_forward_range_insert_no_capacity
(const pointer &pos, const size_type n, const InsertionProxy insert_range_proxy, version_2)
{
//Check if we have enough memory or try to expand current memory
T *const raw_pos = boost::movelib::to_raw_pointer(pos);
const size_type n_pos = raw_pos - this->priv_raw_begin();
//There is not enough memory, allocate a new
//buffer or expand the old one.
size_type real_cap = this->m_holder.template next_capacity<growth_factor_type>(n);
pointer reuse(this->m_holder.start());
pointer const ret (this->m_holder.allocation_command
(allocate_new | expand_fwd | expand_bwd, this->m_holder.m_size + n, real_cap, reuse));
//Buffer reallocated
if(reuse){
//Forward expansion, delay insertion
if(this->m_holder.start() == ret){
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_expand_fwd;
#endif
this->m_holder.capacity(real_cap);
//Expand forward
this->priv_forward_range_insert_expand_forward(raw_pos, n, insert_range_proxy);
}
//Backwards (and possibly forward) expansion
else{
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_expand_bwd;
#endif
this->priv_forward_range_insert_expand_backwards
(boost::movelib::to_raw_pointer(ret), real_cap, raw_pos, n, insert_range_proxy);
}
}
//New buffer
else{
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
++this->num_alloc;
#endif
this->priv_forward_range_insert_new_allocation
( boost::movelib::to_raw_pointer(ret), real_cap, raw_pos, n, insert_range_proxy);
}
return iterator(this->m_holder.start() + n_pos);
}
template <class InsertionProxy>
iterator priv_forward_range_insert
(const pointer &pos, const size_type n, const InsertionProxy insert_range_proxy)
{
BOOST_ASSERT(this->m_holder.capacity() >= this->m_holder.m_size);
//Check if we have enough memory or try to expand current memory
const size_type remaining = this->m_holder.capacity() - this->m_holder.m_size;
bool same_buffer_start = n <= remaining;
if (!same_buffer_start){
return priv_forward_range_insert_no_capacity(pos, n, insert_range_proxy, alloc_version());
}
else{
//Expand forward
T *const raw_pos = boost::movelib::to_raw_pointer(pos);
const size_type n_pos = raw_pos - this->priv_raw_begin();
this->priv_forward_range_insert_expand_forward(raw_pos, n, insert_range_proxy);
return iterator(this->m_holder.start() + n_pos);
}
}
template <class InsertionProxy>
iterator priv_forward_range_insert_at_end
(const size_type n, const InsertionProxy insert_range_proxy, version_0)
{
//Check if we have enough memory or try to expand current memory
const size_type remaining = this->m_holder.capacity() - this->m_holder.m_size;
if (n > remaining){
//This will trigger an error
throw_bad_alloc();
}
this->priv_forward_range_insert_at_end_expand_forward(n, insert_range_proxy);
return this->end();
}
template <class InsertionProxy, class AllocVersion>
BOOST_CONTAINER_FORCEINLINE iterator priv_forward_range_insert_at_end
(const size_type n, const InsertionProxy insert_range_proxy, AllocVersion)
{
return this->priv_forward_range_insert(this->back_ptr(), n, insert_range_proxy);
}
//Takes the range pointed by [first_pos, last_pos) and shifts it to the right
//by 'shift_count'. 'limit_pos' marks the end of constructed elements.
//
//Precondition: first_pos <= last_pos <= limit_pos
//
//The shift operation might cross limit_pos so elements to moved beyond limit_pos
//are uninitialized_moved with an allocator. Other elements are moved.
//
//The shift operation might left uninitialized elements after limit_pos
//and the number of uninitialized elements is returned by the function.
//
//Old situation:
// first_pos last_pos old_limit
// | | |
// ____________V_______V__________________V_____________
//| prefix | range | suffix |raw_mem ~
//|____________|_______|__________________|_____________~
//
//New situation in Case A (hole_size == 0):
// range is moved through move assignments
//
// first_pos last_pos limit_pos
// | | |
// ____________V_______V__________________V_____________
//| prefix' | | | range |suffix'|raw_mem ~
//|________________+______|___^___|_______|_____________~
// | |
// |_>_>_>_>_>^
//
//
//New situation in Case B (hole_size >= 0):
// range is moved through uninitialized moves
//
// first_pos last_pos limit_pos
// | | |
// ____________V_______V__________________V________________
//| prefix' | | | [hole] | range |
//|_______________________________________|________|___^___|
// | |
// |_>_>_>_>_>_>_>_>_>_>_>_>_>_>_>_>_>_^
//
//New situation in Case C (hole_size == 0):
// range is moved through move assignments and uninitialized moves
//
// first_pos last_pos limit_pos
// | | |
// ____________V_______V__________________V___
//| prefix' | | | range |
//|___________________________________|___^___|
// | |
// |_>_>_>_>_>_>_>_>_>_>_>^
size_type priv_insert_ordered_at_shift_range
(size_type first_pos, size_type last_pos, size_type limit_pos, size_type shift_count)
{
BOOST_ASSERT(first_pos <= last_pos);
BOOST_ASSERT(last_pos <= limit_pos);
//
T* const begin_ptr = this->priv_raw_begin();
T* const first_ptr = begin_ptr + first_pos;
T* const last_ptr = begin_ptr + last_pos;
size_type hole_size = 0;
//Case A:
if((last_pos + shift_count) <= limit_pos){
//All move assigned
boost::container::move_backward(first_ptr, last_ptr, last_ptr + shift_count);
}
//Case B:
else if((first_pos + shift_count) >= limit_pos){
//All uninitialized_moved
::boost::container::uninitialized_move_alloc
(this->m_holder.alloc(), first_ptr, last_ptr, first_ptr + shift_count);
hole_size = first_pos + shift_count - limit_pos;
}
//Case C:
else{
//Some uninitialized_moved
T* const limit_ptr = begin_ptr + limit_pos;
T* const boundary_ptr = limit_ptr - shift_count;
::boost::container::uninitialized_move_alloc(this->m_holder.alloc(), boundary_ptr, last_ptr, limit_ptr);
//The rest is move assigned
boost::container::move_backward(first_ptr, boundary_ptr, limit_ptr);
}
return hole_size;
}
private:
BOOST_CONTAINER_FORCEINLINE T *priv_raw_begin() const
{ return boost::movelib::to_raw_pointer(m_holder.start()); }
BOOST_CONTAINER_FORCEINLINE T* priv_raw_end() const
{ return this->priv_raw_begin() + this->m_holder.m_size; }
template <class InsertionProxy>
void priv_forward_range_insert_at_end_expand_forward(const size_type n, InsertionProxy insert_range_proxy)
{
T* const old_finish = this->priv_raw_end();
insert_range_proxy.uninitialized_copy_n_and_update(this->m_holder.alloc(), old_finish, n);
this->m_holder.m_size += n;
}
template <class InsertionProxy>
void priv_forward_range_insert_expand_forward(T* const pos, const size_type n, InsertionProxy insert_range_proxy)
{
//n can't be 0, because there is nothing to do in that case
if(BOOST_UNLIKELY(!n)) return;
//There is enough memory
T* const old_finish = this->priv_raw_end();
const size_type elems_after = old_finish - pos;
if (!elems_after){
insert_range_proxy.uninitialized_copy_n_and_update(this->m_holder.alloc(), old_finish, n);
this->m_holder.m_size += n;
}
else if (elems_after >= n){
//New elements can be just copied.
//Move to uninitialized memory last objects
::boost::container::uninitialized_move_alloc
(this->m_holder.alloc(), old_finish - n, old_finish, old_finish);
this->m_holder.m_size += n;
//Copy previous to last objects to the initialized end
boost::container::move_backward(pos, old_finish - n, old_finish);
//Insert new objects in the pos
insert_range_proxy.copy_n_and_update(this->m_holder.alloc(), pos, n);
}
else {
//The new elements don't fit in the [pos, end()) range.
//Copy old [pos, end()) elements to the uninitialized memory (a gap is created)
::boost::container::uninitialized_move_alloc(this->m_holder.alloc(), pos, old_finish, pos + n);
BOOST_TRY{
//Copy first new elements in pos (gap is still there)
insert_range_proxy.copy_n_and_update(this->m_holder.alloc(), pos, elems_after);
//Copy to the beginning of the unallocated zone the last new elements (the gap is closed).
insert_range_proxy.uninitialized_copy_n_and_update(this->m_holder.alloc(), old_finish, n - elems_after);
this->m_holder.m_size += n;
}
BOOST_CATCH(...){
boost::container::destroy_alloc_n(this->get_stored_allocator(), pos + n, elems_after);
BOOST_RETHROW
}
BOOST_CATCH_END
}
}
template <class InsertionProxy>
void priv_forward_range_insert_new_allocation
(T* const new_start, size_type new_cap, T* const pos, const size_type n, InsertionProxy insert_range_proxy)
{
//n can be zero, if we want to reallocate!
T *new_finish = new_start;
T *old_finish;
//Anti-exception rollbacks
typename value_traits::ArrayDeallocator new_buffer_deallocator(new_start, this->m_holder.alloc(), new_cap);
typename value_traits::ArrayDestructor new_values_destroyer(new_start, this->m_holder.alloc(), 0u);
//Initialize with [begin(), pos) old buffer
//the start of the new buffer
T * const old_buffer = this->priv_raw_begin();
if(old_buffer){
new_finish = ::boost::container::uninitialized_move_alloc
(this->m_holder.alloc(), this->priv_raw_begin(), pos, old_finish = new_finish);
new_values_destroyer.increment_size(new_finish - old_finish);
}
//Initialize new objects, starting from previous point
old_finish = new_finish;
insert_range_proxy.uninitialized_copy_n_and_update(this->m_holder.alloc(), old_finish, n);
new_finish += n;
new_values_destroyer.increment_size(new_finish - old_finish);
//Initialize from the rest of the old buffer,
//starting from previous point
if(old_buffer){
new_finish = ::boost::container::uninitialized_move_alloc
(this->m_holder.alloc(), pos, old_buffer + this->m_holder.m_size, new_finish);
//Destroy and deallocate old elements
//If there is allocated memory, destroy and deallocate
if(!value_traits::trivial_dctr_after_move)
boost::container::destroy_alloc_n(this->get_stored_allocator(), old_buffer, this->m_holder.m_size);
this->m_holder.deallocate(this->m_holder.start(), this->m_holder.capacity());
}
this->m_holder.start(new_start);
this->m_holder.m_size = size_type(new_finish - new_start);
this->m_holder.capacity(new_cap);
//All construction successful, disable rollbacks
new_values_destroyer.release();
new_buffer_deallocator.release();
}
template <class InsertionProxy>
void priv_forward_range_insert_expand_backwards
(T* const new_start, const size_type new_capacity,
T* const pos, const size_type n, InsertionProxy insert_range_proxy)
{
//n can be zero to just expand capacity
//Backup old data
T* const old_start = this->priv_raw_begin();
const size_type old_size = this->m_holder.m_size;
T* const old_finish = old_start + old_size;
//We can have 8 possibilities:
const size_type elemsbefore = static_cast<size_type>(pos - old_start);
const size_type s_before = static_cast<size_type>(old_start - new_start);
const size_type before_plus_new = elemsbefore + n;
//Update the vector buffer information to a safe state
this->m_holder.start(new_start);
this->m_holder.capacity(new_capacity);
this->m_holder.m_size = 0;
//If anything goes wrong, this object will destroy
//all the old objects to fulfill previous vector state
typename value_traits::ArrayDestructor old_values_destroyer(old_start, this->m_holder.alloc(), old_size);
//Check if s_before is big enough to hold the beginning of old data + new data
if(s_before >= before_plus_new){
//Copy first old values before pos, after that the new objects
T *const new_elem_pos =
::boost::container::uninitialized_move_alloc(this->m_holder.alloc(), old_start, pos, new_start);
this->m_holder.m_size = elemsbefore;
insert_range_proxy.uninitialized_copy_n_and_update(this->m_holder.alloc(), new_elem_pos, n);
this->m_holder.m_size = before_plus_new;
const size_type new_size = old_size + n;
//Check if s_before is so big that even copying the old data + new data
//there is a gap between the new data and the old data
if(s_before >= new_size){
//Old situation:
// _________________________________________________________
//| raw_mem | old_begin | old_end |
//| __________________________________|___________|_________|
//
//New situation:
// _________________________________________________________
//| old_begin | new | old_end | raw_mem |
//|___________|__________|_________|________________________|
//
//Now initialize the rest of memory with the last old values
if(before_plus_new != new_size){ //Special case to avoid operations in back insertion
::boost::container::uninitialized_move_alloc
(this->m_holder.alloc(), pos, old_finish, new_start + before_plus_new);
//All new elements correctly constructed, avoid new element destruction
this->m_holder.m_size = new_size;
}
//Old values destroyed automatically with "old_values_destroyer"
//when "old_values_destroyer" goes out of scope unless the have trivial
//destructor after move.
if(value_traits::trivial_dctr_after_move)
old_values_destroyer.release();
}
//s_before is so big that divides old_end
else{
//Old situation:
// __________________________________________________
//| raw_mem | old_begin | old_end |
//| ___________________________|___________|_________|
//
//New situation:
// __________________________________________________
//| old_begin | new | old_end | raw_mem |
//|___________|__________|_________|_________________|
//
//Now initialize the rest of memory with the last old values
//All new elements correctly constructed, avoid new element destruction
const size_type raw_gap = s_before - before_plus_new;
if(!value_traits::trivial_dctr){
//Now initialize the rest of s_before memory with the
//first of elements after new values
::boost::container::uninitialized_move_alloc_n
(this->m_holder.alloc(), pos, raw_gap, new_start + before_plus_new);
//Now we have a contiguous buffer so program trailing element destruction
//and update size to the final size.
old_values_destroyer.shrink_forward(new_size-s_before);
this->m_holder.m_size = new_size;
//Now move remaining last objects in the old buffer begin
T * const remaining_pos = pos + raw_gap;
if(remaining_pos != old_start){ //Make sure data has to be moved
::boost::container::move(remaining_pos, old_finish, old_start);
}
//Once moved, avoid calling the destructors if trivial after move
if(value_traits::trivial_dctr_after_move){
old_values_destroyer.release();
}
}
else{ //If trivial destructor, we can uninitialized copy + copy in a single uninitialized copy
::boost::container::uninitialized_move_alloc_n
(this->m_holder.alloc(), pos, static_cast<size_type>(old_finish - pos), new_start + before_plus_new);
this->m_holder.m_size = new_size;
old_values_destroyer.release();
}
}
}
else{
//Check if we have to do the insertion in two phases
//since maybe s_before is not big enough and
//the buffer was expanded both sides
//
//Old situation:
// _________________________________________________
//| raw_mem | old_begin + old_end | raw_mem |
//|_________|_____________________|_________________|
//
//New situation with do_after:
// _________________________________________________
//| old_begin + new + old_end | raw_mem |
//|___________________________________|_____________|
//
//New without do_after:
// _________________________________________________
//| old_begin + new + old_end | raw_mem |
//|____________________________|____________________|
//
const bool do_after = n > s_before;
//Now we can have two situations: the raw_mem of the
//beginning divides the old_begin, or the new elements:
if (s_before <= elemsbefore) {
//The raw memory divides the old_begin group:
//
//If we need two phase construction (do_after)
//new group is divided in new = new_beg + new_end groups
//In this phase only new_beg will be inserted
//
//Old situation:
// _________________________________________________
//| raw_mem | old_begin | old_end | raw_mem |
//|_________|___________|_________|_________________|
//
//New situation with do_after(1):
//This is not definitive situation, the second phase
//will include
// _________________________________________________
//| old_begin | new_beg | old_end | raw_mem |
//|___________|_________|_________|_________________|
//
//New situation without do_after:
// _________________________________________________
//| old_begin | new | old_end | raw_mem |
//|___________|_____|_________|_____________________|
//
//Copy the first part of old_begin to raw_mem
::boost::container::uninitialized_move_alloc_n
(this->m_holder.alloc(), old_start, s_before, new_start);
//The buffer is all constructed until old_end,
//so program trailing destruction and assign final size
//if !do_after, s_before+n otherwise.
size_type new_1st_range;
if(do_after){
new_1st_range = s_before;
//release destroyer and update size
old_values_destroyer.release();
}
else{
new_1st_range = n;
if(value_traits::trivial_dctr_after_move)
old_values_destroyer.release();
else{
old_values_destroyer.shrink_forward(old_size - (s_before - n));
}
}
this->m_holder.m_size = old_size + new_1st_range;
//Now copy the second part of old_begin overwriting itself
T *const next = ::boost::container::move(old_start + s_before, pos, old_start);
//Now copy the new_beg elements
insert_range_proxy.copy_n_and_update(this->m_holder.alloc(), next, new_1st_range);
//If there is no after work and the last old part needs to be moved to front, do it
if(!do_after && (n != s_before)){
//Now displace old_end elements
::boost::container::move(pos, old_finish, next + new_1st_range);
}
}
else {
//If we have to expand both sides,
//we will play if the first new values so
//calculate the upper bound of new values
//The raw memory divides the new elements
//
//If we need two phase construction (do_after)
//new group is divided in new = new_beg + new_end groups
//In this phase only new_beg will be inserted
//
//Old situation:
// _______________________________________________________
//| raw_mem | old_begin | old_end | raw_mem |
//|_______________|___________|_________|_________________|
//
//New situation with do_after():
// ____________________________________________________
//| old_begin | new_beg | old_end | raw_mem |
//|___________|_______________|_________|______________|
//
//New situation without do_after:
// ______________________________________________________
//| old_begin | new | old_end | raw_mem |
//|___________|_____|_________|__________________________|
//
//First copy whole old_begin and part of new to raw_mem
T * const new_pos = ::boost::container::uninitialized_move_alloc
(this->m_holder.alloc(), old_start, pos, new_start);
this->m_holder.m_size = elemsbefore;
const size_type mid_n = s_before - elemsbefore;
insert_range_proxy.uninitialized_copy_n_and_update(this->m_holder.alloc(), new_pos, mid_n);
//The buffer is all constructed until old_end,
//release destroyer
this->m_holder.m_size = old_size + s_before;
old_values_destroyer.release();
if(do_after){
//Copy new_beg part
insert_range_proxy.copy_n_and_update(this->m_holder.alloc(), old_start, elemsbefore);
}
else{
//Copy all new elements
const size_type rest_new = n - mid_n;
insert_range_proxy.copy_n_and_update(this->m_holder.alloc(), old_start, rest_new);
T* const move_start = old_start + rest_new;
//Displace old_end, but make sure data has to be moved
T* const move_end = move_start != pos ? ::boost::container::move(pos, old_finish, move_start)
: old_finish;
//Destroy remaining moved elements from old_end except if they
//have trivial destructor after being moved
size_type n_destroy = s_before - n;
if(!value_traits::trivial_dctr_after_move)
boost::container::destroy_alloc_n(this->get_stored_allocator(), move_end, n_destroy);
this->m_holder.m_size -= n_destroy;
}
}
//This is only executed if two phase construction is needed
if(do_after){
//The raw memory divides the new elements
//
include/boost/container/vector.hpp view on Meta::CPAN
boost::container::move_backward(pos, finish_n, old_finish);
//Now overwrite with new_end
//The new_end part is [first + (n - n_after), last)
insert_range_proxy.copy_n_and_update(this->m_holder.alloc(), pos, n_after);
}
else {
//The raw_mem from end will divide new_end part
//
//Old situation:
// _____________________________________________________________
//| raw_mem | old_begin | old_end | raw_mem |
//|______________|___________|____________|_____________________|
//
//New situation with do_after(2):
// _____________________________________________________________
//| old_begin + new_beg | new_end |old_end | raw_mem |
//|__________________________|_______________|________|_________|
//
const size_type mid_last_dist = n_after - elemsafter;
//First initialize data in raw memory
//Copy to the old_end part to the uninitialized zone leaving a gap.
::boost::container::uninitialized_move_alloc
(this->m_holder.alloc(), pos, old_finish, old_finish + mid_last_dist);
typename value_traits::ArrayDestructor old_end_destroyer
(old_finish + mid_last_dist, this->m_holder.alloc(), old_finish - pos);
//Copy the first part to the already constructed old_end zone
insert_range_proxy.copy_n_and_update(this->m_holder.alloc(), pos, elemsafter);
//Copy the rest to the uninitialized zone filling the gap
insert_range_proxy.uninitialized_copy_n_and_update(this->m_holder.alloc(), old_finish, mid_last_dist);
this->m_holder.m_size += n_after;
old_end_destroyer.release();
}
}
}
}
void priv_throw_if_out_of_range(size_type n) const
{
//If n is out of range, throw an out_of_range exception
if (n >= this->size()){
throw_out_of_range("vector::at out of range");
}
}
BOOST_CONTAINER_FORCEINLINE bool priv_in_range(const_iterator pos) const
{
return (this->begin() <= pos) && (pos < this->end());
}
BOOST_CONTAINER_FORCEINLINE bool priv_in_range_or_end(const_iterator pos) const
{
return (this->begin() <= pos) && (pos <= this->end());
}
#ifdef BOOST_CONTAINER_VECTOR_ALLOC_STATS
public:
unsigned int num_expand_fwd;
unsigned int num_expand_bwd;
unsigned int num_shrink;
unsigned int num_alloc;
void reset_alloc_stats()
{ num_expand_fwd = num_expand_bwd = num_alloc = 0, num_shrink = 0; }
#endif
#endif //#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
};
#if __cplusplus >= 201703L
template <typename InputIterator>
vector(InputIterator, InputIterator) ->
vector<typename iterator_traits<InputIterator>::value_type>;
template <typename InputIterator, typename Allocator>
vector(InputIterator, InputIterator, Allocator const&) ->
vector<typename iterator_traits<InputIterator>::value_type, Allocator>;
#endif
}} //namespace boost::container
#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
namespace boost {
//!has_trivial_destructor_after_move<> == true_type
//!specialization for optimizations
template <class T, class Allocator>
struct has_trivial_destructor_after_move<boost::container::vector<T, Allocator> >
{
typedef typename ::boost::container::allocator_traits<Allocator>::pointer pointer;
static const bool value = ::boost::has_trivial_destructor_after_move<Allocator>::value &&
::boost::has_trivial_destructor_after_move<pointer>::value;
};
}
#endif //#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
#include <boost/container/detail/config_end.hpp>
#endif // #ifndef BOOST_CONTAINER_CONTAINER_VECTOR_HPP
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