QTypeRevision 类

QTypeRevision 类包含版本号的轻量表示，带有两个 8 位段、主要及次要 (其中任一可能未知)。 更多...

头：	#include <QTypeRevision>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Core) target_link_libraries(mytarget PRIVATE Qt6::Core)
qmake:	QT += core
Since:	Qt 6.0

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公共函数

	QTypeRevision ()
bool	hasMajorVersion () const
bool	hasMinorVersion () const
bool	isValid () const
quint8	majorVersion () const
quint8	minorVersion () const
Integer	toEncodedVersion () const

静态公共成员

QTypeRevision	fromEncodedVersion (Integer value )
QTypeRevision	fromMajorVersion (Major majorVersion )
QTypeRevision	fromMinorVersion (Minor minorVersion )
QTypeRevision	fromVersion (Major majorVersion , Minor minorVersion )
bool	isValidSegment (Integer segment )
QTypeRevision	zero ()

相关非成员

QDataStream &	operator<< (QDataStream & out , const QTypeRevision & revision )
QDataStream &	operator>> (QDataStream & in , QTypeRevision & revision )

详细描述

Use this class to describe revisions of a type. Compatible revisions can be expressed as increments of the minor version. Breaking changes can be expressed as increments of the major version. The return values of QMetaMethod::revision () 和 QMetaProperty::revision () can be passed to QTypeRevision::fromEncodedVersion (). The resulting major and minor versions specify in which Qt versions the properties and methods were added.

另请参阅 QMetaMethod::revision () 和 QMetaProperty::revision ().

成员函数文档编制

[constexpr] QTypeRevision:: QTypeRevision ()

Produces an invalid revision.

另请参阅 isValid ().

[static constexpr] template <typename Integer, if_valid_value_type<Integer>> QTypeRevision QTypeRevision:: fromEncodedVersion ( Integer value )

产生 QTypeRevision 从给定 value . value encodes both the minor and major versions in the least significant and second least significant byte, respectively.

value must not have any bits outside the least significant two bytes set. Integer needs to be at least 16 bits wide, and must not have a sign bit in the least significant 16 bits.

另请参阅 toEncodedVersion ().

[static constexpr] template <typename Major, if_valid_segment_type<Major>> QTypeRevision QTypeRevision:: fromMajorVersion ( Major majorVersion )

产生 QTypeRevision 从给定 majorVersion with an invalid minor version. majorVersion needs to be a valid segment.

另请参阅 isValidSegment ().

[static constexpr] template <typename Minor, if_valid_segment_type<Minor>> QTypeRevision QTypeRevision:: fromMinorVersion ( Minor minorVersion )

产生 QTypeRevision 从给定 minorVersion with an invalid major version. minorVersion needs to be a valid segment.

另请参阅 isValidSegment ().

[static constexpr] template <typename Major, typename Minor, if_valid_segment_type<Major>, if_valid_segment_type > QTypeRevision QTypeRevision:: fromVersion ( Major majorVersion , Minor minorVersion )

产生 QTypeRevision 从给定 majorVersion and minorVersion , both of which need to be a valid segments.

另请参阅 isValidSegment ().

[constexpr] bool QTypeRevision:: hasMajorVersion () const

Returns true if the major version is known, otherwise false.

另请参阅 majorVersion () 和 hasMinorVersion ().

[constexpr] bool QTypeRevision:: hasMinorVersion () const

Returns true if the minor version is known, otherwise false.

另请参阅 minorVersion () 和 hasMajorVersion ().

[constexpr] bool QTypeRevision:: isValid () const

Returns true if the major version or the minor version is known, otherwise false.

另请参阅 hasMajorVersion () 和 hasMinorVersion ().

[static constexpr] template <typename Integer, if_valid_segment_type<Integer>> bool QTypeRevision:: isValidSegment ( Integer segment )

Returns true if the given number can be used as either major or minor version in a QTypeRevision . The valid range for segment is >= 0 and < 255 .

[constexpr] quint8 QTypeRevision:: majorVersion () const

Returns the major version encoded in the revision.

另请参阅 hasMajorVersion () 和 minorVersion ().

[constexpr] quint8 QTypeRevision:: minorVersion () const

Returns the minor version encoded in the revision.

另请参阅 hasMinorVersion () 和 majorVersion ().

[constexpr] template <typename Integer, if_valid_value_type<Integer>> Integer QTypeRevision:: toEncodedVersion () const

Transforms the revision into an integer value, encoding the minor version into the least significant byte, and the major version into the second least significant byte.

Integer needs to be at least 16 bits wide, and must not have a sign bit in the least significant 16 bits.

另请参阅 fromEncodedVersion ().

[static constexpr] QTypeRevision QTypeRevision:: zero ()

产生 QTypeRevision 采用主要和次要版本 0 .

相关非成员

[since 6.0] QDataStream & operator<< ( QDataStream & out , const QTypeRevision & revision )

写入修订 revision 到流 out .

该函数在 Qt 6.0 引入。

[since 6.0] QDataStream & operator>> ( QDataStream & in , QTypeRevision & revision )

读取修订从流 in and stores it in revision .

该函数在 Qt 6.0 引入。

内容

• 公共函数

• 静态公共成员

• 相关非成员

• 详细描述