Variant.h File Reference

Object capable of storing values of different types. More...

#include "common/Assert.h"
#include "common/Globals.h"
#include "math/MathUtils.h"
#include "objects/wrappers/Optional.h"

Go to the source code of this file.

Classes
class	AlignedUnion< TArgs >
	Stores value of type std::aligned_union, having size and alignment equal to maximum of sizes and alignments of template types. More...
struct	VariantHelpers::DefaultCreate< TArgs >
	Creates a variant using default constructor. More...
struct	VariantHelpers::Delete< TArgs >
	Destroys the object currently stored in variant. More...
struct	VariantHelpers::CopyMoveCreate< TArgs >
	Creates a variant by copying/moving value currently stored in other variant. More...
struct	VariantHelpers::Assign< TArgs >
	Assigns a value type of which can be stored in variant. More...
struct	VariantHelpers::CopyMoveAssign< TArgs >
	Creates a variant by copying/moving value currently stored in other variant. More...
struct	VariantHelpers::Swap< TArgs >
	Swaps content of two variants. More...
struct	VariantIterator< T0, TArgs >
	Iterates through types of variant until idx-th type is found, and executes given TVisitor, passing arguments to its method visit. More...
struct	VariantIterator< T0 >
	Specialization for last type. More...
struct	ConstructTypeIdxTag
	Tag for invoking constructor with type index as parameter.
class	Variant< TArgs >
	Variant, an implementation of type-safe union, similar to std::variant or boost::variant. More...
struct	Detail::ForValue< N, T0, TArgs >
struct	Detail::ForValue< N, NothingType, TArgs... >
struct	Detail::ForValue< N, T0 >

Namespaces
	VariantHelpers
	Helper visitors creating, deleting or modifying Variant.
	Detail
	std
	Overload of std::swap for Sph::Array.

Functions
template<typename TFunctor , typename... TArgs>
decltype(auto) INLINE	forValue (Variant< TArgs... > &variant, TFunctor &&functor)
template<typename TFunctor , typename... TArgs>
decltype(auto) INLINE	forValue (const Variant< TArgs... > &variant, TFunctor &&functor)
template<typename... TArgs>
void	std::swap (Sph::Variant< TArgs... > &v1, Sph::Variant< TArgs... > &v2)

Detailed Description

Object capable of storing values of different types.

Author

Pavel Sevecek (sevecek at sirrah.troja.mff.cuni.cz)

Date

2016-2021

Definition in file Variant.h.

Function Documentation

forValue() [1/2]

template<typename TFunctor , typename... TArgs>

decltype(auto) INLINE forValue	(	const Variant< TArgs... > &	variant,
		TFunctor &&	functor
	)

Executes a functor passing current value stored in variant as its parameter. Overload for const l-value reference.

Definition at line 435 of file Variant.h.

forValue() [2/2]

template<typename TFunctor , typename... TArgs>

decltype(auto) INLINE forValue	(	Variant< TArgs... > &	variant,
		TFunctor &&	functor
	)

Executes a functor passing current value stored in variant as its parameter. The functor must either have templated operator() (i.e. generic lambda), or have an overloaded operator for each type contained in variant. If the variant contains type NothingType, the functor not called for this type. This allows to call generic functions, defined on other types while keeping NothingType as a special value representing an empty variant.

Parameters

variant	Variant, must contain a value (checked by assert).
functor	Executed functor, takes one parameter - value obtained from Variant.

Returns

Value returned by the functor.

Definition at line 428 of file Variant.h.