QuantLib_Handle (3) - Linux Manuals

QuantLib_Handle: Shared handle to an observable.

NAME

QuantLib::Handle - Shared handle to an observable.

SYNOPSIS

#include <ql/handle.hpp>

Public Member Functions

Handle (const boost::shared_ptr< T > &h=boost::shared_ptr< T >(), bool registerAsObserver=true)

const boost::shared_ptr< T > & currentLink () const
dereferencing
const boost::shared_ptr< T > & operator-> () const

const boost::shared_ptr< T > & operator* () const

bool empty () const
checks if the contained shared pointer points to anything
operator boost::shared_ptr< Observable > () const
allows registration as observable
template<class U > bool operator== (const Handle< U > &other)
equality test
template<class U > bool operator!= (const Handle< U > &other)
disequality test
template<class U > bool operator< (const Handle< U > &other)
strict weak ordering

Protected Attributes

boost::shared_ptr< Link > link_

Detailed Description

template<class T> class QuantLib::Handle< T >

All copies of an instance of this class refer to the same observable by means of a relinkable smart pointer. When such pointer is relinked to another observable, the change will be propagated to all the copies.

Precondition:

Class T must inherit from Observable

Constructor & Destructor Documentation

Handle (const boost::shared_ptr< T > & h = boost::shared_ptr<T>(), bool registerAsObserver = true) [explicit]

Warning

registerAsObserver is left as a backdoor in case the programmer cannot guarantee that the object pointed to will remain alive for the whole lifetime of the handle---namely, it should be set to false when the passed shared pointer does not own the pointee (this should only happen in a controlled environment, so that the programmer is aware of it). Failure to do so can very likely result in a program crash. If the programmer does want the handle to register as observer of such a shared pointer, it is his responsibility to ensure that the handle gets destroyed before the pointed object does.

Author

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