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  5. QTypeRevision

QTypeRevision 類

QTypeRevision 類包含版本號的輕量錶示，帶有兩個 8 位段、主要及次要 (其中任一可能未知)。 更多...

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

此類 強烈可比較 .

公共函數

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

靜態公共成員

QTypeRevision fromEncodedVersion (Integer value )
QTypeRevision fromMajorVersion (Major majorVersion )
QTypeRevision fromMinorVersion (Minor minorVersion )
QTypeRevision fromVersion (Major majorVersion , Minor minorVersion )
bool isValidSegment (Integer segment )
QTypeRevision zero ()
(從 6.0 起) QDataStream & operator<< (QDataStream & out , const QTypeRevision & revision )
(從 6.0 起) QDataStream & operator>> (QDataStream & in , QTypeRevision & revision )

詳細描述

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.

另請參閱 QMetaMethod::revision () 和 QMetaProperty::revision ().

成員函數文檔編製

[constexpr noexcept] QTypeRevision:: QTypeRevision ()

Produces an invalid revision.

另請參閱 isValid ().

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

産生 QTypeRevision 從給定 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.

另請參閱 toEncodedVersion ().

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

産生 QTypeRevision 從給定 majorVersion with an invalid minor version. majorVersion needs to be a valid segment.

另請參閱 isValidSegment ().

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

産生 QTypeRevision 從給定 minorVersion with an invalid major version. minorVersion needs to be a valid segment.

另請參閱 isValidSegment ().

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

産生 QTypeRevision 從給定 majorVersion and minorVersion , both of which need to be a valid segments.

另請參閱 isValidSegment ().

[constexpr] bool QTypeRevision:: hasMajorVersion () const

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

另請參閱 majorVersion () 和 hasMinorVersion ().

[constexpr] bool QTypeRevision:: hasMinorVersion () const

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

另請參閱 minorVersion () 和 hasMajorVersion ().

[constexpr] bool QTypeRevision:: isValid () const

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

另請參閱 hasMajorVersion () 和 hasMinorVersion ().

[static constexpr] template <typename Integer, QTypeRevision::if_valid_segment_type<Integer> = true> bool QTypeRevision:: isValidSegment ( 整數 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.

另請參閱 hasMajorVersion () 和 minorVersion ().

[constexpr] quint8 QTypeRevision:: minorVersion () const

Returns the minor version encoded in the revision.

另請參閱 hasMinorVersion () 和 majorVersion ().

[constexpr] template <typename Integer, QTypeRevision::if_valid_value_type<Integer> = true> 整數 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.

另請參閱 fromEncodedVersion ().

[static constexpr] QTypeRevision QTypeRevision:: zero ()

産生 QTypeRevision 采用主要和次要版本 0 .

相關非成員

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

寫入修訂 revision 到流 out .

該函數在 Qt 6.0 引入。

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

讀取修訂從流 in and stores it in revision .

該函數在 Qt 6.0 引入。

內容

  1. 公共函數

  2. 靜態公共成員

  3. 相關非成員

  4. 詳細描述