LazyInit< PAR > Class Template Reference

#include "lib/lazy-init.hpp"

Description

template<class PAR = EmptyBase>
class lib::LazyInit< PAR >

Mix-in for lazy/delayed initialisation of an embedded functor.

This allows to keep the overall object (initially) copyable, while later preventing copy once the functor was »engaged«. Initially, only a »trap« is installed into the functor, invoking an initialisation closure on first use.

Definition at line 206 of file lazy-init.hpp.

Public Member Functions
template<class SIG , class INI , typename... ARGS>
	LazyInit (std::function< SIG > &targetFunctor, INI &&initialiser, ARGS &&...parentCtorArgs)
	prepare an initialiser to be activated on first use
	LazyInit (LazyInit const &ref)
	LazyInit (LazyInit &&rref)
template<class SIG >
void	installEmptyInitialiser ()
template<class SIG , class INI >
void	installInitialiser (std::function< SIG > &targetFunctor, INI &&initialiser)
bool	isInit () const
LazyInit &	operator= (LazyInit const &ref)
LazyInit &	operator= (LazyInit &&rref)

Classes
struct	MarkDisabled

Protected Member Functions
template<typename... ARGS>
	LazyInit (MarkDisabled, ARGS &&...parentCtorArgs)

Private Types
template<class SIG >
using	DelegateType = std::function< std::function< SIG > &(RawAddr)>
using	HeapStorage = InPlaceBuffer< PlaceholderType >
using	PendingInit = std::shared_ptr< HeapStorage >
using	PlaceholderType = DelegateType< void(void)>

Private Member Functions
PendingInit const &	__trapLocked (PendingInit const &init)
PendingInit &&	__trapLocked (PendingInit &&init)
template<class SIG , class INI >
DelegateType< SIG >	buildInitialiserDelegate (std::function< SIG > &targetFunctor, INI &&initialiser)
template<class SIG >
DelegateType< SIG >	emptyInitialiser ()
template<class SIG , class INI >
PendingInit	prepareInitialiser (std::function< SIG > &targetFunctor, INI &&initialiser)

Static Private Member Functions
template<class SIG >
static DelegateType< SIG > *	getPointerToDelegate (HeapStorage &buffer)
template<class SIG >
static std::function< SIG >	maybeInvoke (PendingInit const &pendingInit, RawAddr location)

Private Attributes
PendingInit	pendingInit_
	manage heap storage for a pending initialisation closure

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Class Documentation

lib::LazyInit::MarkDisabled

struct lib::LazyInit::MarkDisabled

Collaboration diagram for LazyInit< PAR >::MarkDisabled:

Constructor & Destructor Documentation

LazyInit()

LazyInit ( MarkDisabled  , ARGS &&...  parentCtorArgs  )

inlineprotected

allows derived classes to leave the initialiser deliberately disabled

Definition at line 247 of file lazy-init.hpp.

Inheritance diagram for LazyInit< PAR >:

Collaboration diagram for LazyInit< PAR >:

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

• lazy-init.hpp