Any Class

class QtProtobuf ::Any

A helper class to simplify working with the protobuf Any type. 更多...

头：	#include <Any>
CMake:	find_package(Qt6 REQUIRED COMPONENTS ProtobufWellKnownTypes) target_link_libraries(mytarget PRIVATE Qt6::ProtobufWellKnownTypes)
qmake:	QT += protobufwellknowntypes
Since:	Qt 6.6
继承：	QProtobufMessage
Status:	Technical Preview

• 所有成员列表，包括继承成员

公共函数

	Any ()
	Any (const QtProtobuf::Any & other )
	~Any ()
std::optional<T>	as () const
void	setTypeUrl (const QString & typeUrl )
void	setValue (const QByteArray & value )
QString	typeUrl () const
QByteArray	value () const
QtProtobuf::Any &	operator= (const QtProtobuf::Any & other )

静态公共成员

QtProtobuf::Any

fromMessage (const T & message , QAnyStringView typeUrlPrefix = defaultUrlPrefix())

相关非成员

bool	operator!= (const QtProtobuf::Any & lhs , const QtProtobuf::Any & rhs )
bool	operator== (const QtProtobuf::Any & lhs , const QtProtobuf::Any & rhs )

详细描述

The Any class enables easy casting to and from other types using as () 和 fromMessage ().

It is the type used in code generated by qtprotobufgen when a message contains a field of the google.protobuf.Any type.

成员函数文档编制

Any:: 任何 ()

Constructs a defaulted, empty, instance of Any.

Any:: 任何 (const QtProtobuf::Any & other )

构造副本为 other .

[noexcept] Any:: ~Any ()

Destroys this instance of Any

template <typename T> std::optional < T > Any:: as () const

This function compares the message name of T with the value of typeUrl () before deserializing the data.

If the verification or deserialization fails it will return std::nullopt .

注意： T must be a class derived from QProtobufMessage 采用 Q_PROTOBUF_OBJECT macro or (for a nested Any message) be Any itself.

[static] template <typename T> QtProtobuf::Any Any:: fromMessage (const T & message , QAnyStringView typeUrlPrefix = defaultUrlPrefix())

This function serializes the given message as the value of the returned Any instance. This instance's typeUrl () is constructed from a prefix, a forward slash and the message name obtained from T::propertyOrdering.getMessageFullName() 。若 typeUrlPrefix is supplied, it is used as prefix, otherwise "type.googleapis.com" 被使用。

注意： T must be a class derived from QProtobufMessage 采用 Q_PROTOBUF_OBJECT macro or (for a nested Any message) be Any itself.

void Any:: setTypeUrl (const QString & typeUrl )

Sets the type URL for the data contained to typeUrl .

注意： No verification is performed on the input to test if it's correct or in a valid format.

注意： Setter 函数对于特性 typeUrl .

另请参阅 typeUrl () 和 fromMessage ().

void Any:: setValue (const QByteArray & value )

Sets the raw bytes of the value stored to value .

value must be the output of serializing a message.

注意： Setter 函数对于特性 value .

另请参阅 value () 和 fromMessage ().

QString Any:: typeUrl () const

Returns the type URL of the Any object. The URL is meant as a hint for what the contained data really is.

注意： Qt has no support for dynamically obtaining any potential recipes for deconstructing types and simply uses the type URL to verify that types passed as T to as<T>() are of the correct type.

注意： Getter function for property typeUrl.

另请参阅 setTypeUrl () 和 value ().

QByteArray Any:: value () const

Returns the raw bytes that make up the value stored.

Consult typeUrl () to determine how to interpret these bytes.

注意： Getter function for property value.

另请参阅 setValue () 和 typeUrl ().

QtProtobuf::Any &Any:: operator= (const QtProtobuf::Any & other )

Copies the data of other into this instance.

相关非成员

[noexcept] bool operator!= (const QtProtobuf::Any & lhs , const QtProtobuf::Any & rhs )

Returns true if the two instances of Any, lhs and rhs , are distinct.

[noexcept] bool operator== (const QtProtobuf::Any & lhs , const QtProtobuf::Any & rhs )

Returns true if the two instances of Any, lhs and rhs , compare equal.

内容

• 公共函数

• 静态公共成员

• 相关非成员

• 详细描述