real::detail::small_vec< T, InlineCapacity >::Storage Union Reference

Collaboration diagram for real::detail::small_vec< T, InlineCapacity >::Storage:

Public Member Functions
constexpr	Storage () noexcept
	Starts in the inline state.
constexpr	~Storage ()
	Destruction handled by cleanup.
	Storage (const Storage &)=delete
Storage &	operator= (const Storage &)=delete
	Storage (Storage &&)=delete
Storage &	operator= (Storage &&)=delete

Public Attributes
inline_block	inline_buffer
	Inline storage (when not heap).
T *	heap_ptr
	Heap storage (when is_heap_).

Detailed Description

template<typename T, std::size_t InlineCapacity>
union real::detail::small_vec< T, InlineCapacity >::Storage

Definition at line 252 of file storage.hpp.

Constructor & Destructor Documentation

Storage() [1/3]

template<typename T , std::size_t InlineCapacity>

constexpr real::detail::small_vec< T, InlineCapacity >::Storage::Storage ( )

inlineconstexprnoexcept

Starts in the inline state.

At run time the inline buffer is left UNINITIALIZED: small_vec writes every element through std::construct_at (placement-new) before any read (push_back and assign), so the value-init was pure overhead — ~30 % of the instruction count on a findall tokenizing workload (a fresh slot buffer per match, of which ~2 slots serve). At compile time the member must be active and initialized for the constexpr matching path (which assigns through inline_data), so it is value-initialized there via construct_at on the whole inline_block — activating a class-type member is what a constexpr union allows (an element-wise or bare C-array activation is not).

Definition at line 267 of file storage.hpp.

~Storage()

template<typename T , std::size_t InlineCapacity>

constexpr real::detail::small_vec< T, InlineCapacity >::Storage::~Storage ( )

inlineconstexpr

Destruction handled by cleanup.

Definition at line 274 of file storage.hpp.

Storage() [2/3]

template<typename T , std::size_t InlineCapacity>

real::detail::small_vec< T, InlineCapacity >::Storage::Storage ( const Storage &  )

delete

Storage() [3/3]

template<typename T , std::size_t InlineCapacity>

real::detail::small_vec< T, InlineCapacity >::Storage::Storage ( Storage &&  )

delete

Member Function Documentation

operator=() [1/2]

template<typename T , std::size_t InlineCapacity>

Storage & real::detail::small_vec< T, InlineCapacity >::Storage::operator= ( const Storage &  )

delete

operator=() [2/2]

template<typename T , std::size_t InlineCapacity>

Storage & real::detail::small_vec< T, InlineCapacity >::Storage::operator= ( Storage &&  )

delete

Member Data Documentation

heap_ptr

template<typename T , std::size_t InlineCapacity>

T* real::detail::small_vec< T, InlineCapacity >::Storage::heap_ptr

Heap storage (when is_heap_).

Definition at line 255 of file storage.hpp.

inline_buffer

template<typename T , std::size_t InlineCapacity>

inline_block real::detail::small_vec< T, InlineCapacity >::Storage::inline_buffer

Inline storage (when not heap).

Definition at line 254 of file storage.hpp.

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

• include/real/storage.hpp