NCollection_Allocator< ItemType > Class Template Reference

Implements allocator requirements as defined in ISO C++ Standard 2003, section 20.1.5. More...

#include <NCollection_Allocator.hxx>

Data Structures
struct	rebind

Public Types
typedef ItemType	value_type
typedef value_type *	pointer
typedef const value_type *	const_pointer
typedef value_type &	reference
typedef const value_type &	const_reference
typedef size_t	size_type
typedef ptrdiff_t	difference_type

Public Member Functions
	NCollection_Allocator () noexcept=default
	Constructor. Creates an object using the default Open CASCADE allocation mechanism, i.e., which uses Standard::Allocate() and Standard::Free() underneath.
	NCollection_Allocator (const occ::handle< NCollection_BaseAllocator > &) noexcept
	Constructor.
template<typename OtherType >
NCollection_Allocator &	operator= (const NCollection_Allocator< OtherType > &) noexcept
	Assignment operator.
template<typename OtherType >
	NCollection_Allocator (const NCollection_Allocator< OtherType > &) noexcept
	Constructor. Creates an object using the default Open CASCADE allocation mechanism, i.e., which uses Standard::Allocate() and Standard::Free() underneath.
template<typename Type = value_type>
std::enable_if<!std::is_const< Type >::value, pointer >::type	address (reference theItem) const noexcept
	Returns an object address.
const_pointer	address (const_reference theItem) const noexcept
	Returns an object address.
pointer	allocate (const size_type theSize, const void *=nullptr) const
	Allocates memory for theSize objects.
void	deallocate (pointer thePnt, const size_type) const
	Frees previously allocated memory.
pointer	reallocate (pointer thePnt, const size_type theSize) const
	Reallocates memory for theSize objects.
template<class _Objty , class... _Types>
void	construct (_Objty *_Ptr, _Types &&... _Args)
	Constructs an object. Uses placement new operator and copy constructor to construct an object.
void	destroy (pointer thePnt) noexcept(std::is_nothrow_destructible< value_type >::value)
	Destroys the object. Uses the object destructor.
constexpr bool	operator== (const NCollection_Allocator &) const noexcept
template<class U >
constexpr bool	operator== (const NCollection_Allocator< U > &) const noexcept
constexpr bool	operator!= (const NCollection_Allocator &) const noexcept
template<class U >
constexpr bool	operator!= (const NCollection_Allocator< U > &) const noexcept

Detailed Description

template<typename ItemType>
class NCollection_Allocator< ItemType >

Implements allocator requirements as defined in ISO C++ Standard 2003, section 20.1.5.

The allocator uses a standard OCCT mechanism for memory allocation and deallocation. It can be used with standard containers (std::vector, std::map, etc.) to take advantage of OCCT memory optimizations.

Example of use:

NCollection_Allocator<TopoDS_Shape> anSAllocator();
std::list<TopoDS_Shape, NCollection_Allocator<TopoDS_Shape>> aList(anSAllocator);
TopoDS_Solid aSolid = BRepPrimAPI_MakeBox(10., 20., 30.);
aList.push_back(aSolid);

Member Typedef Documentation

const_pointer

template<typename ItemType >

typedef const value_type* NCollection_Allocator< ItemType >::const_pointer

const_reference

template<typename ItemType >

typedef const value_type& NCollection_Allocator< ItemType >::const_reference

difference_type

template<typename ItemType >

typedef ptrdiff_t NCollection_Allocator< ItemType >::difference_type

pointer

template<typename ItemType >

typedef value_type* NCollection_Allocator< ItemType >::pointer

reference

template<typename ItemType >

typedef value_type& NCollection_Allocator< ItemType >::reference

size_type

template<typename ItemType >

typedef size_t NCollection_Allocator< ItemType >::size_type

value_type

template<typename ItemType >

typedef ItemType NCollection_Allocator< ItemType >::value_type

Constructor & Destructor Documentation

NCollection_Allocator() [1/3]

template<typename ItemType >

NCollection_Allocator< ItemType >::NCollection_Allocator ( )

defaultnoexcept

Constructor. Creates an object using the default Open CASCADE allocation mechanism, i.e., which uses Standard::Allocate() and Standard::Free() underneath.

NCollection_Allocator() [2/3]

template<typename ItemType >

NCollection_Allocator< ItemType >::NCollection_Allocator ( const occ::handle< NCollection_BaseAllocator > & )

inlinenoexcept

Constructor.

NCollection_Allocator() [3/3]

template<typename ItemType >

template<typename OtherType >

NCollection_Allocator< ItemType >::NCollection_Allocator ( const NCollection_Allocator< OtherType > & )

inlinenoexcept

Constructor. Creates an object using the default Open CASCADE allocation mechanism, i.e., which uses Standard::Allocate() and Standard::Free() underneath.

Member Function Documentation

address() [1/2]

template<typename ItemType >

const_pointer NCollection_Allocator< ItemType >::address ( const_reference theItem ) const

inlinenoexcept

Returns an object address.

address() [2/2]

template<typename ItemType >

template<typename Type = value_type>

std::enable_if<!std::is_const< Type >::value, pointer >::type NCollection_Allocator< ItemType >::address ( reference theItem ) const

inlinenoexcept

Returns an object address.

allocate()

template<typename ItemType >

pointer NCollection_Allocator< ItemType >::allocate ( const size_type theSize, const void * = nullptr ) const

inline

Allocates memory for theSize objects.

construct()

template<typename ItemType >

template<class _Objty , class... _Types>

void NCollection_Allocator< ItemType >::construct ( _Objty * _Ptr, _Types &&... _Args )

inline

Constructs an object. Uses placement new operator and copy constructor to construct an object.

deallocate()

template<typename ItemType >

void NCollection_Allocator< ItemType >::deallocate ( pointer thePnt, const size_type  ) const

inline

Frees previously allocated memory.

destroy()

template<typename ItemType >

void NCollection_Allocator< ItemType >::destroy ( pointer thePnt )

inlinenoexcept

Destroys the object. Uses the object destructor.

operator!=() [1/2]

template<typename ItemType >

constexpr bool NCollection_Allocator< ItemType >::operator!= ( const NCollection_Allocator< ItemType > & ) const

inlineconstexprnoexcept

operator!=() [2/2]

template<typename ItemType >

template<class U >

constexpr bool NCollection_Allocator< ItemType >::operator!= ( const NCollection_Allocator< U > & ) const

inlineconstexprnoexcept

operator=()

template<typename ItemType >

template<typename OtherType >

NCollection_Allocator & NCollection_Allocator< ItemType >::operator= ( const NCollection_Allocator< OtherType > & )

inlinenoexcept

Assignment operator.

operator==() [1/2]

template<typename ItemType >

constexpr bool NCollection_Allocator< ItemType >::operator== ( const NCollection_Allocator< ItemType > & ) const

inlineconstexprnoexcept

operator==() [2/2]

template<typename ItemType >

template<class U >

constexpr bool NCollection_Allocator< ItemType >::operator== ( const NCollection_Allocator< U > & ) const

inlineconstexprnoexcept

reallocate()

template<typename ItemType >

pointer NCollection_Allocator< ItemType >::reallocate ( pointer thePnt, const size_type theSize ) const

inline

Reallocates memory for theSize objects.

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The documentation for this class was generated from the following file:

• NCollection_Allocator.hxx