This class represents a delegate, that is a compound of an object reference and a member function pointer. More...

#include <delegate.hxx>

Public Member Functions
	delegate (std::nullptr_t) noexcept
	Constructs an empty delegate representing a `nullptr`.

template<class Lambda >
	delegate (Lambda f)
	Constructs a delegate through a lambda expression implicitly.

	delegate (void)
	The default constructor.

bool	operator== (const delegate &rhs) const noexcept
	Compares this instance to the as argument passed rhs . More...

bool	operator!= (const delegate &rhs) const noexcept
	Compares this instance to the as argument passed rhs . More...

bool	operator== (std::nullptr_t const) const noexcept
	Compares this instance to a `nullptr`. More...

bool	operator!= (std::nullptr_t const) const noexcept
	Compares this instance to a `nullptr`. More...

	operator bool () const noexcept
	Converts this instance explicitly to `bool`. More...

bool	is_lambda (void) const
	Determines if this instance wraps a lambda expression or `std::function` More...

R	operator() (A... args) const
	The functor operator invokes the adapted callable target. More...

void	reset (void)
	Resets this instance. More...

template<class C >
delegate< R(A...)>	create (C pObject, R(C::pMethod)(A...)) noexcept
	Creates a delegate from a member function and object pointer. More...

template<class C >
delegate< R(A...)>	create (C &object, R(C::*pMethod)(A...)) noexcept
	Creates a delegate from a member function and object reference. More...

template<class C >
delegate< R(A...)>	create (const C pObject, R(C::pMethod)(A...) const) noexcept
	Creates a delegate from a const member function and const object pointer. More...

template<class C >
delegate< R(A...)>	create (const C &object, R(C::*pMethod)(A...) const) noexcept
	Creates a delegate from a const member function and const object reference. More...

Static Public Member Functions
static delegate	create (R(*const pFunction)(A...))
	Creates a delegate from a static function. More...

static delegate	create (std::function< R(A...)> &&f)
	Creates a delegate from a lambda expression or `std::function`. More...

static delegate	create (const std::function< R(A...)> &f)
	Creates a delegate from a lambda expression or `std::function`. More...

template<class C >
static delegate	create (C pObject, R(C::pMethod)(A...)) noexcept

template<class C >
static delegate	create (C &object, R(C::*pMethod)(A...)) noexcept

template<class C >
static delegate	create (const C pObject, R(C::pMethod)(A...) const) noexcept

template<class C >
static delegate	create (const C &object, R(C::*pMethod)(A...) const) noexcept

Detailed Description

template<class R, class ... A>
class Arp::Base::Core::delegate< R(A...)>

This class represents a delegate, that is a compound of an object reference and a member function pointer.

The generic type of a delegate just depends on the signature of the (member) function pointer but not on the type of the object on which the member function pointer is invoked. A delegate might be seen as a generalized function pointer (callback) in OOP design. It might invoke the following callable targets:

static functions
member functions
lambda expressions
std::function

The make_delegate function shall be used to create delegates from these callable targets.

Member Function Documentation

◆ create() [1/7]

template<class R , class ... A>

template<class C >

delegate< R(A...)> Arp::Base::Core::delegate< R(A...)>::create	(	C &	object,
		R(C::*)(A...)	pMethod
	)

inlinenoexcept

Creates a delegate from a member function and object reference.

Parameters

pMethod	The member function to invoke.
object	The object to invoke the member function on.

Returns: A new delegate instance created by the arguments.

◆ create() [2/7]

template<class R , class ... A>

template<class C >

delegate< R(A...)> Arp::Base::Core::delegate< R(A...)>::create	(	C *	pObject,
		R(C::*)(A...)	pMethod
	)

inlinenoexcept

Creates a delegate from a member function and object pointer.

Parameters

pMethod	The member function to invoke.
pObject	The object pointer to invoke the member function on.

Returns: A new delegate instance created by the arguments.

◆ create() [3/7]

template<class R , class ... A>

template<class C >

delegate< R(A...)> Arp::Base::Core::delegate< R(A...)>::create	(	const C &	object,
		R(C::*)(A...) const	pMethod
	)

inlinenoexcept

Creates a delegate from a const member function and const object reference.

Parameters

pMethod	The member function to invoke.
object	The object to invoke the member function on.

Returns: A new delegate instance created by the arguments.

◆ create() [4/7]

template<class R , class ... A>

template<class C >

delegate< R(A...)> Arp::Base::Core::delegate< R(A...)>::create	(	const C *	pObject,
		R(C::*)(A...) const	pMethod
	)

inlinenoexcept

Creates a delegate from a const member function and const object pointer.

Parameters

pMethod	The member function to invoke.
pObject	The object pointer to invoke the member function on.

Returns: A new delegate instance created by the arguments.

◆ create() [5/7]

template<class R , class ... A>

delegate< R(A...)> Arp::Base::Core::delegate< R(A...)>::create ( const std::function< R(A...)> & f )

inlinestatic

Creates a delegate from a lambda expression or std::function.

Parameters

f	The function to invoke.

Returns: A new delegate instance created by the arguments.

◆ create() [6/7]

template<class R , class ... A>

delegate< R(A...)> Arp::Base::Core::delegate< R(A...)>::create ( R(*)(A...) pFunction )

inlinestatic

Creates a delegate from a static function.

Parameters

pFunction The static function to invoke.

Returns: A new delegate instance created by the arguments.

◆ create() [7/7]

template<class R , class ... A>

delegate< R(A...)> Arp::Base::Core::delegate< R(A...)>::create ( std::function< R(A...)> && f )

inlinestatic

Creates a delegate from a lambda expression or std::function.

Parameters

f	The function to invoke.

Returns: A new delegate instance created by the arguments.

◆ is_lambda()

template<class R , class ... A>

bool Arp::Base::Core::delegate< R(A...)>::is_lambda ( void ) const

inline

Determines if this instance wraps a lambda expression or std::function

Returns: true if this instance is a lambda expression, otherwise false

◆ operator bool()

template<class R , class ... A>

Arp::Base::Core::delegate< R(A...)>::operator bool

inlinenoexcept

Converts this instance explicitly to bool.

Returns: false if this instance is empty (nullptr), otherwise true

◆ operator!=() [1/2]

template<class R , class ... A>

bool Arp::Base::Core::delegate< R(A...)>::operator!= ( const delegate< R(A...)> & rhs ) const

inlinenoexcept

Compares this instance to the as argument passed rhs .

Parameters

rhs	The argument to compare this instance to.

Returns: true if rhs is not equal, otherwise false

◆ operator!=() [2/2]

template<class R , class ... A>

bool Arp::Base::Core::delegate< R(A...)>::operator!= ( std::nullptr_t const ) const

inlinenoexcept

Compares this instance to a nullptr.

Returns: true if nullptr is not equal, otherwise false

◆ operator()()

template<class R , class ... A>

R Arp::Base::Core::delegate< R(A...)>::operator() ( A... args ) const

inline

The functor operator invokes the adapted callable target.

Parameters

args	The arguments to pass to the callable target with the same signature.

Returns: Returns the result of the invoked target.

◆ operator==() [1/2]

template<class R , class ... A>

bool Arp::Base::Core::delegate< R(A...)>::operator== ( const delegate< R(A...)> & rhs ) const

inlinenoexcept

Compares this instance to the as argument passed rhs .

Parameters

rhs	The argument to compare this instance to.

Returns: true if rhs is equal, otherwise false

◆ operator==() [2/2]

template<class R , class ... A>

bool Arp::Base::Core::delegate< R(A...)>::operator== ( std::nullptr_t const ) const

inlinenoexcept

Compares this instance to a nullptr.

Returns: true if nullptr is equal, otherwise false

◆ reset()

template<class R , class ... A>

void Arp::Base::Core::delegate< R(A...)>::reset ( void )

inline

Resets this instance.

After resetting this instance, this instance is not invokable any more. if(*this) will return false

.

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

Arp/Base/Core/delegate.hxx
Arp/Base/Core/Detail/delegate.ipp

Public Member Functions

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ create() [1/7]

◆ create() [2/7]

◆ create() [3/7]

◆ create() [4/7]

◆ create() [5/7]

◆ create() [6/7]

◆ create() [7/7]

◆ is_lambda()

◆ operator bool()

◆ operator!=() [1/2]

◆ operator!=() [2/2]

◆ operator()()

◆ operator==() [1/2]

◆ operator==() [2/2]

◆ reset()