Aws::Crt::Variant< Ts > Class Template Reference

#include <Variant.h>

Inheritance diagram for Aws::Crt::Variant< Ts >:

Public Types
using	IndexT = VariantDetail::Index::VariantIndex
template<std::size_t Index>
using	RawAlternativePointerT
template<std::size_t Index>
using	ConstRawAlternativePointerT

Public Member Functions
template<typename T = typename VariantDetail::VariantImpl<Ts...>::FirstAlternative, typename std::enable_if< std::is_default_constructible< T >::value, bool >::type = true>
	Variant () noexcept(isFirstAlternativeNothrowDefaultConstructible)
template<typename T = typename VariantDetail::VariantImpl<Ts...>::FirstAlternative, typename std::enable_if<!std::is_default_constructible< T >::value, bool >::type = true>
	Variant ()=delete
template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>
	Variant (const T &val) noexcept(std::is_nothrow_constructible< typename std::decay< T >::type, decltype(val)>::value)
template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>
	Variant (T &&val) noexcept(std::is_nothrow_constructible< typename std::decay< T >::type, decltype(val)>::value)
template<typename T, typename... Args>
	Variant (Aws::Crt::InPlaceTypeT< T > ipt, Args &&...args)
template<typename T, typename... Args, EnableIfOtherIsThisVariantAlternative< T > = 1>
T &	emplace (Args &&...args)
template<std::size_t Index, typename... Args>
auto	emplace (Args &&...args) -> typename ThisVariantAlternative< Index >::type &
template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>
bool	holds_alternative () const
template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>
T &	get ()
template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>
T *	get_if ()
template<std::size_t Index>
auto	get () -> typename ThisVariantAlternative< Index >::type &
template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>
const T &	get () const
template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>
const T *	get_if () const
template<std::size_t Index>
auto	get () const -> const typename ThisVariantAlternative< Index >::type &
template<std::size_t Index>
auto	get_if () -> RawAlternativePointerT< Index >
template<std::size_t Index>
auto	get_if () const -> ConstRawAlternativePointerT< Index >
std::size_t	index () const
template<typename VisitorT>
void	Visit (VisitorT &&visitor)

Static Public Attributes
static constexpr std::size_t	AlternativeCount = sizeof...(Ts)

Detailed Description

template<typename... Ts>
class Aws::Crt::Variant< Ts >

Custom implementation of a Variant type. std::variant requires C++17.

Template Parameters

Ts	Types of the variant value.

Member Typedef Documentation

ConstRawAlternativePointerT

template<typename... Ts>

template<std::size_t Index>

using Aws::Crt::Variant< Ts >::ConstRawAlternativePointerT

Initial value:

typename std::add_pointer<
               typename std::add_const<typename ThisVariantAlternative<Index>::type>::type>::type

IndexT

template<typename... Ts>

using Aws::Crt::Variant< Ts >::IndexT = VariantDetail::Index::VariantIndex

RawAlternativePointerT

template<typename... Ts>

template<std::size_t Index>

using Aws::Crt::Variant< Ts >::RawAlternativePointerT

Initial value:

 
typename std::add_pointer<typename ThisVariantAlternative<Index>::type>::type

Constructor & Destructor Documentation

Variant() [1/5]

template<typename... Ts>

template<typename T = typename VariantDetail::VariantImpl<Ts...>::FirstAlternative, typename std::enable_if< std::is_default_constructible< T >::value, bool >::type = true>

Aws::Crt::Variant< Ts >::Variant ( )

inlinenoexcept

Variant() [2/5]

template<typename... Ts>

template<typename T = typename VariantDetail::VariantImpl<Ts...>::FirstAlternative, typename std::enable_if<!std::is_default_constructible< T >::value, bool >::type = true>

Aws::Crt::Variant< Ts >::Variant ( )

delete

Variant() [3/5]

template<typename... Ts>

template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>

Aws::Crt::Variant< Ts >::Variant ( const T & val )

inlinenoexcept

Variant() [4/5]

template<typename... Ts>

template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>

Aws::Crt::Variant< Ts >::Variant ( T && val )

inlinenoexcept

Variant() [5/5]

template<typename... Ts>

template<typename T, typename... Args>

Aws::Crt::Variant< Ts >::Variant ( Aws::Crt::InPlaceTypeT< T > ipt, Args &&... args )

inlineexplicit

Member Function Documentation

emplace() [1/2]

template<typename... Ts>

template<typename T, typename... Args, EnableIfOtherIsThisVariantAlternative< T > = 1>

T & Aws::Crt::Variant< Ts >::emplace ( Args &&... args )

inline

emplace() [2/2]

template<typename... Ts>

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

auto Aws::Crt::Variant< Ts >::emplace ( Args &&... args ) -> typename ThisVariantAlternative< Index >::type &

inline

get() [1/4]

template<typename... Ts>

template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>

T & Aws::Crt::Variant< Ts >::get ( )

inline

get() [2/4]

template<typename... Ts>

template<std::size_t Index>

auto Aws::Crt::Variant< Ts >::get ( ) -> typename ThisVariantAlternative< Index >::type &

inline

get() [3/4]

template<typename... Ts>

template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>

const T & Aws::Crt::Variant< Ts >::get ( ) const

inline

get() [4/4]

template<typename... Ts>

template<std::size_t Index>

auto Aws::Crt::Variant< Ts >::get ( ) const -> const typename ThisVariantAlternative< Index >::type &

inline

get_if() [1/4]

template<typename... Ts>

template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>

T * Aws::Crt::Variant< Ts >::get_if ( )

inline

get_if() [2/4]

template<typename... Ts>

template<std::size_t Index>

auto Aws::Crt::Variant< Ts >::get_if ( ) -> RawAlternativePointerT< Index >

inline

get_if() [3/4]

template<typename... Ts>

template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>

const T * Aws::Crt::Variant< Ts >::get_if ( ) const

inline

get_if() [4/4]

template<typename... Ts>

template<std::size_t Index>

auto Aws::Crt::Variant< Ts >::get_if ( ) const -> ConstRawAlternativePointerT< Index >

inline

holds_alternative()

template<typename... Ts>

template<typename T, EnableIfOtherIsThisVariantAlternative< T > = 1>

bool Aws::Crt::Variant< Ts >::holds_alternative ( ) const

inline

index()

template<typename... Ts>

std::size_t Aws::Crt::Variant< Ts >::index ( ) const

inline

Visit()

template<typename... Ts>

template<typename VisitorT>

void Aws::Crt::Variant< Ts >::Visit ( VisitorT && visitor )

inline

Member Data Documentation

AlternativeCount

template<typename... Ts>

std::size_t Aws::Crt::Variant< Ts >::AlternativeCount = sizeof...(Ts)

staticconstexpr

---

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

• crt/aws-crt-cpp/include/aws/crt/Variant.h