Piro::Provider< T > Class Template Reference

Handle for auxiliary object factories. More...

#include <Piro_Provider.hpp>

Public Member Functions
Constructors
	Provider ()
	Constructs a Provider that returns null pointers.
	Provider (Teuchos::ENull)
	Constructs an uninitialized Provider. More...
template<typename U >
	Provider (const Teuchos::RCP< U > &instance)
	Constructs a Provider returning an already existing instance. More...
template<typename P >
	Provider (const P &p)
	Constructs a Provider from a callable object, either a function object (functor) or a function pointer. More...
	Provider (const Teuchos::RCP< ProviderBase< T > > &ptr_in)
	Constructs a Provider handle that wraps the provided implementation.
Core functionality
Teuchos::RCP< T >	operator() (const Teuchos::RCP< Teuchos::ParameterList > &params)
	Returns an instance of a subclass of the type T. More...
Validity check
bool	nonnull () const
	Checks that the Provider has been initialized.
bool	is_null () const
	Checks whether the Provider has been left uninitialized.
Access to internals
Teuchos::RCP< const ProviderBase< T > >	ptr () const
	Returns a const pointer to the internal implementation.
Teuchos::RCP< ProviderBase< T > >	ptr ()
	Returns a non-const pointer to the internal implementation.

Related Functions
(Note that these are not member functions.)
Validity check
template<typename T >
bool	nonnull (const Provider< T > &handle)
	Returns true if handle is initialized. More...
template<typename T >
bool	is_null (const Provider< T > &handle)
	Returns true if handle is uninitialized. More...

Detailed Description

template<typename T>
class Piro::Provider< T >

Handle for auxiliary object factories.

A Provider is a smart handle that offers function semantics (i.e. can be called as a function) as well as several implicit conversions as a convenience to manipulate objects that implement the ProviderBase interface.

It is essentially a thin wrapper around Teuchos::RCP<ProviderBase<T>> that preserves its core functionality including sharing and reference counting.

The solver factory Piro::Epetra::SolverFactory uses Providers as sources of auxiliary objects for the different Piro solvers.

Constructor & Destructor Documentation

template<typename T>

Piro::Provider< T >::Provider ( Teuchos::ENull  )

inline

Constructs an uninitialized Provider.

A valid Provider must be assigned to *this before Provider::operator() is called. This constructor exists mostly for debugging purposes and its use is discouraged. The default constructor should be preferred in most cases.

template<typename T>

template<typename U >

Piro::Provider< T >::Provider ( const Teuchos::RCP< U > &  instance )

inline

Constructs a Provider returning an already existing instance.

The template parameter U must refer to a type that can be converted to T.

template<typename T>

template<typename P >

Piro::Provider< T >::Provider ( const P &  p )

inline

Constructs a Provider from a callable object, either a function object (functor) or a function pointer.

The template parameter P must refer to a copy-constructible callable object type such that the following code is valid

Teuchos::RCP<T> instance = p(params); 

where params denotes a variable of type Teuchos::RCP<Teuchos::ParameterList>.

Member Function Documentation

template<typename T>

Teuchos::RCP<T> Piro::Provider< T >::operator() ( const Teuchos::RCP< Teuchos::ParameterList > &  params )

inline

Returns an instance of a subclass of the type T.

Precondition

this->nonnull()

Friends And Related Function Documentation

template<typename T >

bool is_null ( const Provider< T > &  handle )

related

Returns true if handle is uninitialized.

References Piro::Provider< T >::is_null().

template<typename T >

bool nonnull ( const Provider< T > &  handle )

related

Returns true if handle is initialized.

References Piro::Provider< T >::nonnull().

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

• Piro_Provider.hpp