hi::v1::observer< T >::proxy_type Class Reference

#include <hikogui/observer/observer_intf.hpp>

Public Types
using	reference = value_type &
using	const_reference = value_type const &
using	pointer = value_type *
using	const_pointer = value_type const *

Public Member Functions
	~proxy_type () noexcept
	Commits and destruct the proxy object.
	proxy_type (proxy_type const &)=delete
proxy_type &	operator= (proxy_type const &)=delete
	proxy_type (proxy_type &&other) noexcept
proxy_type &	operator= (proxy_type &&other) noexcept
	proxy_type (observer *observer, value_type *ptr) noexcept
	Create a proxy object.
	proxy_type () noexcept
	Create a proxy object.
reference	operator* () noexcept
	Dereference the value.
const_reference	operator* () const noexcept
	Dereference the value.
pointer	operator-> () noexcept
	Pointer dereference the value.
const_pointer	operator-> () const noexcept
	Pointer dereference the value.
pointer	operator& () noexcept
	Pointer dereference the value.
const_pointer	operator& () const noexcept
	Pointer dereference the value.
	X (++) X(--) X(++) X(--) X(+
void	start_write () noexcept

Data Fields
value_type *	_ptr
std::optional< value_type >	_original_value

Friends
class	observer

Detailed Description

template<typename T>
class hi::v1::observer< T >::proxy_type

A proxy object of the observer.

The proxy is a RAII object that makes sure that listeners will get notified if the value was modified.

Constructor & Destructor Documentation

~proxy_type()

template<typename T >

hi::v1::observer< T >::proxy_type::~proxy_type ( )

inlinenoexcept

Commits and destruct the proxy object.

If commit() or abort() are called or the proxy object is empty then the destructor does not commit the changes.

proxy_type() [1/2]

template<typename T >

hi::v1::observer< T >::proxy_type::proxy_type ( observer * observer, value_type * ptr )

inlinenoexcept

Create a proxy object.

Parameters

observer	a pointer to the observer.
ptr	a pointer to the sub-object of the shared_state that the observer is pointing to.

proxy_type() [2/2]

template<typename T >

hi::v1::observer< T >::proxy_type::proxy_type ( )

inlinenoexcept

Create a proxy object.

Parameters

observer	a pointer to the observer.
ptr	a pointer to the sub-object of the shared_state that the observer is pointing to.

Member Function Documentation

operator&() [1/2]

template<typename T >

const_pointer hi::v1::observer< T >::proxy_type::operator& ( ) const

inlinenoexcept

Pointer dereference the value.

This function allows reads and modification to the value, including calling member functions on the value.

Note

It is undefined behavior to call this function after calling commit() or abort()

operator&() [2/2]

template<typename T >

pointer hi::v1::observer< T >::proxy_type::operator& ( )

inlinenoexcept

Pointer dereference the value.

This function allows reads and modification to the value, including calling member functions on the value.

Note

It is undefined behavior to call this function after calling commit() or abort()

operator*() [1/2]

template<typename T >

const_reference hi::v1::observer< T >::proxy_type::operator* ( ) const

inlinenoexcept

Dereference the value.

This function allows reads and modification to the value

Note

It is undefined behavior to call this function after calling commit() or abort()

operator*() [2/2]

template<typename T >

reference hi::v1::observer< T >::proxy_type::operator* ( )

inlinenoexcept

Dereference the value.

This function allows reads and modification to the value

Note

It is undefined behavior to call this function after calling commit() or abort()

operator->() [1/2]

template<typename T >

const_pointer hi::v1::observer< T >::proxy_type::operator-> ( ) const

inlinenoexcept

Pointer dereference the value.

This function allows reads and modification to the value, including calling member functions on the value.

Note

It is undefined behavior to call this function after calling commit() or abort()

operator->() [2/2]

template<typename T >

pointer hi::v1::observer< T >::proxy_type::operator-> ( )

inlinenoexcept

Pointer dereference the value.

This function allows reads and modification to the value, including calling member functions on the value.

Note

It is undefined behavior to call this function after calling commit() or abort()

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

• hikogui/src/hikogui/observer/observer_intf.hpp