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

helper class for variant operations using jump tables for O(1) dispatch. More...

#include <variant.hpp>

Static Public Member Functions
static void	copy (std::size_t which, const void *src, void *dst)
	copy one object to another.
static void	move (std::size_t which, void *src, void *dst)
	move one object to another.
static void	destroy (std::size_t which, void *data)
	destroy the currently active object.
static bool	equal (std::size_t which, const void *a, const void *b)
	compare if two objects of the same alternative are equal.
template<typename Ordering >
static Ordering	compare (std::size_t which, const void *a, const void *b)
	three-way compare two objects of the same alternative.

Detailed Description

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

helper class for variant operations using jump tables for O(1) dispatch.

Member Function Documentation

compare()

template<typename... Ts>

template<typename Ordering >

static Ordering join::details::VariantHelper< Ts >::compare ( std::size_t which, const void * a, const void * b )

inlinestatic

three-way compare two objects of the same alternative.

Parameters

which	internal storage index of the active alternative.
a	first storage pointer.
b	second storage pointer.

Returns

ordering of a relative to b.

copy()

template<typename... Ts>

static void join::details::VariantHelper< Ts >::copy ( std::size_t which, const void * src, void * dst )

inlinestatic

copy one object to another.

Parameters

which	internal storage index of the active alternative.
src	source storage pointer.
dst	destination storage pointer.

destroy()

template<typename... Ts>

static void join::details::VariantHelper< Ts >::destroy ( std::size_t which, void * data )

inlinestatic

destroy the currently active object.

Parameters

which	internal storage index of the active alternative.
data	storage pointer.

equal()

template<typename... Ts>

static bool join::details::VariantHelper< Ts >::equal ( std::size_t which, const void * a, const void * b )

inlinestatic

compare if two objects of the same alternative are equal.

Parameters

which	internal storage index of the active alternative.
a	first storage pointer.
b	second storage pointer.

Returns

true if equal, false otherwise.

move()

template<typename... Ts>

static void join::details::VariantHelper< Ts >::move ( std::size_t which, void * src, void * dst )

inlinestatic

move one object to another.

Parameters

which	internal storage index of the active alternative.
src	source storage pointer.
dst	destination storage pointer.

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

• core/include/join/variant.hpp