join::details::VariantStorage< Ts > Struct Template Reference

helper class representing a variant storage in order to be able to disable default/copy/move constructors/operators. More...

#include <variant.hpp>

Public Member Functions
constexpr	VariantStorage () noexcept
	default constructor.
constexpr	VariantStorage (const VariantStorage &other)
	copy constructor.
constexpr	VariantStorage (VariantStorage &&other) noexcept
	move constructor.
template<std::size_t I, typename... Args>
constexpr	VariantStorage (in_place_index_t< I >, Args &&... args)
	constructs a variant storage with the alternative T specified by the index I.
	~VariantStorage ()
	destroy the VariantStorage instance.
constexpr VariantStorage &	operator= (const VariantStorage &other)
	copy assignment.
constexpr VariantStorage &	operator= (VariantStorage &&other) noexcept
	move assignment.
constexpr void *	storage ()
	get storage address.
constexpr const void *	storage () const
	get storage address.

Public Attributes
std::aligned_union< std::max({sizeof(Ts)...}), Ts... >::type	_data
	aligned storage.
std::size_t	_which = sizeof... (Ts) - 1
	index of the alternative that is currently held by the variant.

Detailed Description

template<typename... Ts>
struct join::details::VariantStorage< Ts >

helper class representing a variant storage in order to be able to disable default/copy/move constructors/operators.

Constructor & Destructor Documentation

VariantStorage() [1/4]

template<typename... Ts>

join::details::VariantStorage< Ts >::VariantStorage ( )

inlineconstexprnoexcept

default constructor.

VariantStorage() [2/4]

template<typename... Ts>

join::details::VariantStorage< Ts >::VariantStorage ( const VariantStorage< Ts > & other )

inlineconstexpr

copy constructor.

Parameters

other

object to copy.

VariantStorage() [3/4]

template<typename... Ts>

join::details::VariantStorage< Ts >::VariantStorage ( VariantStorage< Ts > && other )

inlineconstexprnoexcept

move constructor.

Parameters

other

object to move.

VariantStorage() [4/4]

template<typename... Ts>

template<std::size_t I, typename... Args>

join::details::VariantStorage< Ts >::VariantStorage ( in_place_index_t< I > , Args &&... args )

inlineexplicitconstexpr

constructs a variant storage with the alternative T specified by the index I.

Parameters

args	arguments to initialize the contained value with.

~VariantStorage()

template<typename... Ts>

join::details::VariantStorage< Ts >::~VariantStorage ( )

inline

destroy the VariantStorage instance.

Member Function Documentation

operator=() [1/2]

template<typename... Ts>

VariantStorage & join::details::VariantStorage< Ts >::operator= ( const VariantStorage< Ts > & other )

inlineconstexpr

copy assignment.

Parameters

other

object to copy.

Returns

a reference of the current object.

operator=() [2/2]

template<typename... Ts>

VariantStorage & join::details::VariantStorage< Ts >::operator= ( VariantStorage< Ts > && other )

inlineconstexprnoexcept

move assignment.

Parameters

other

object to move.

Returns

a reference of the current object.

storage() [1/2]

template<typename... Ts>

void * join::details::VariantStorage< Ts >::storage ( )

inlineconstexpr

get storage address.

Returns

storage address.

storage() [2/2]

template<typename... Ts>

const void * join::details::VariantStorage< Ts >::storage ( ) const

inlineconstexpr

get storage address.

Returns

storage address.

Member Data Documentation

_data

template<typename... Ts>

std::aligned_union<std::max({sizeof(Ts)...}),Ts...>::type join::details::VariantStorage< Ts >::_data

aligned storage.

_which

template<typename... Ts>

std::size_t join::details::VariantStorage< Ts >::_which = sizeof... (Ts) - 1

index of the alternative that is currently held by the variant.

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

• core/include/join/variant.hpp