QuantLib_Disposable man page

Disposable< T > — generic disposable object with move semantics  


#include <ql/utilities/disposable.hpp>

Inherits T.

Public Member Functions

Disposable (T &t)
Disposable (const Disposable< T > &t)
Disposable< T > & operator= (const Disposable< T > &t)

Detailed Description

template<class T>

class QuantLib::Disposable< T >" generic disposable object with move semantics

This class can be used for returning a value by copy. It relies on the returned object exposing a swap(T&) method through which the copy constructor and assignment operator are implemented, thus resulting in actual move semantics. Typical use of this class is along the following lines:

Disposable<Foo> bar(Integer i) {
    Foo f(i*2);
    return f;

In order to avoid copies in code such as shown above, the conversion from T to Disposable<T> is destructive, i.e., it does not preserve the state of the original object. Therefore, it is necessary for the developer to avoid code such as

Disposable<Foo> bar(Foo& f) {
    return f;

which would likely render the passed object unusable. The correct way to obtain the desired behavior would be:

Disposable<Foo> bar(Foo& f) {
    Foo temp = f;
    return temp;


Generated automatically by Doxygen for QuantLib from the source code.

Referenced By

Disposable(3) is an alias of QuantLib_Disposable(3).

Fri Feb 10 2017 Version 1.9.1 QuantLib