GenNodeAccessor< TAR > Struct Template Reference

#include "lib/meta/tuple-record-init.hpp"

Description

template<typename TAR>
struct lib::meta::anonymous_namespace{tuple-record-init.hpp}::GenNodeAccessor< TAR >

specialised Accessor to retrieve a given target type from a run-time typed, opaque GenNode element. Since GenNode may hold some value from a (lib::diff::DataValues small and fixed selection of types), we prepare a converter function for each sensible conversion path to the given TAR target type. This converter will placement-construct a target value in a buffer reserved within this Accessor object.

Warning

template bloat: we get a converter for each possible conversion for each instantiation of this template, irrespective if we actually need it or not. The price is payed per distinct type used within some target tuple; we get a VTable and some conversion functions for each.

Definition at line 100 of file tuple-record-init.hpp.

Public Types
using	ConversionBuffer = InstantiateChained< SupportedSourceTypes, Converter, ConverterBase >
using	SupportedSourceTypes = typename Filter< DataValues::List, allow_Conversion >::List

Public Member Functions
	GenNodeAccessor (GenNode const &node)
	~GenNodeAccessor ()
TAR &	accessTargetElement ()
	operator TAR ()

Public Attributes
ConversionBuffer	converter_

Classes
struct	allow_Conversion
class	Converter
struct	ConverterBase

Additional Inherited Members
Protected Member Functions inherited from NonCopyable
	NonCopyable (NonCopyable const &)=delete
NonCopyable &	operator= (NonCopyable const &)=delete

Constructor & Destructor Documentation

~GenNodeAccessor()

~GenNodeAccessor ( )

inline

Note

RAII: when the ctor succeeds, we know the target element was built

Definition at line 160 of file tuple-record-init.hpp.

Inheritance diagram for GenNodeAccessor< TAR >:

Collaboration diagram for GenNodeAccessor< TAR >:

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

• tuple-record-init.hpp