[−][src]Struct qt_core::QAssociativeIterable
The QAssociativeIterable class is an iterable interface for an associative container in a QVariant.
C++ class: QAssociativeIterable
.
The QAssociativeIterable class is an iterable interface for an associative container in a QVariant.
This class allows several methods of accessing the elements of an associative container held within a QVariant. An instance of QAssociativeIterable can be extracted from a QVariant if it can be converted to a QVariantHash or QVariantMap.
QHash<int, QString> mapping; mapping.insert(7, "Seven"); mapping.insert(11, "Eleven"); mapping.insert(42, "Forty-two");
QVariant variant = QVariant::fromValue(mapping); if (variant.canConvert<QVariantHash>()) { QAssociativeIterable iterable = variant.value<QAssociativeIterable>(); // Can use foreach over the values: foreach (const QVariant &v, iterable) { qDebug() << v; } // Can use C++11 range-for over the values: for (const QVariant &v : iterable) { qDebug() << v; } // Can use iterators: QAssociativeIterable::const_iterator it = iterable.begin(); const QAssociativeIterable::const_iterator end = iterable.end(); for ( ; it != end; ++it) { qDebug() << *it; // The current value qDebug() << it.key(); qDebug() << it.value(); } }
The container itself is not copied before iterating over it.
Methods
impl QAssociativeIterable
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pub unsafe fn begin(&self) -> CppBox<ConstIterator>
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Returns a QAssociativeIterable::const_iterator for the beginning of the container. This can be used in stl-style iteration.
Calls C++ function: QAssociativeIterable::const_iterator QAssociativeIterable::begin() const
.
Returns a QAssociativeIterable::const_iterator for the beginning of the container. This can be used in stl-style iteration.
See also end().
pub unsafe fn copy_from(
&mut self,
other: impl CastInto<Ref<QAssociativeIterable>>
) -> MutRef<QAssociativeIterable>
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&mut self,
other: impl CastInto<Ref<QAssociativeIterable>>
) -> MutRef<QAssociativeIterable>
The QAssociativeIterable class is an iterable interface for an associative container in a QVariant.
Calls C++ function: QAssociativeIterable& QAssociativeIterable::operator=(const QAssociativeIterable& other)
.
The QAssociativeIterable class is an iterable interface for an associative container in a QVariant.
This class allows several methods of accessing the elements of an associative container held within a QVariant. An instance of QAssociativeIterable can be extracted from a QVariant if it can be converted to a QVariantHash or QVariantMap.
QHash<int, QString> mapping; mapping.insert(7, "Seven"); mapping.insert(11, "Eleven"); mapping.insert(42, "Forty-two");
QVariant variant = QVariant::fromValue(mapping); if (variant.canConvert<QVariantHash>()) { QAssociativeIterable iterable = variant.value<QAssociativeIterable>(); // Can use foreach over the values: foreach (const QVariant &v, iterable) { qDebug() << v; } // Can use C++11 range-for over the values: for (const QVariant &v : iterable) { qDebug() << v; } // Can use iterators: QAssociativeIterable::const_iterator it = iterable.begin(); const QAssociativeIterable::const_iterator end = iterable.end(); for ( ; it != end; ++it) { qDebug() << *it; // The current value qDebug() << it.key(); qDebug() << it.value(); } }
The container itself is not copied before iterating over it.
pub unsafe fn end(&self) -> CppBox<ConstIterator>
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Returns a QAssociativeIterable::const_iterator for the end of the container. This can be used in stl-style iteration.
Calls C++ function: QAssociativeIterable::const_iterator QAssociativeIterable::end() const
.
Returns a QAssociativeIterable::const_iterator for the end of the container. This can be used in stl-style iteration.
See also begin().
pub unsafe fn find(
&self,
key: impl CastInto<Ref<QVariant>>
) -> CppBox<ConstIterator>
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&self,
key: impl CastInto<Ref<QVariant>>
) -> CppBox<ConstIterator>
Returns a QAssociativeIterable::const_iterator for the given key key in the container, if the types are convertible.
Calls C++ function: QAssociativeIterable::const_iterator QAssociativeIterable::find(const QVariant& key) const
.
Returns a QAssociativeIterable::const_iterator for the given key key in the container, if the types are convertible.
If the key is not found, returns end().
This can be used in stl-style iteration.
This function was introduced in Qt 5.5.
pub unsafe fn new_copy(
other: impl CastInto<Ref<QAssociativeIterable>>
) -> CppBox<QAssociativeIterable>
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other: impl CastInto<Ref<QAssociativeIterable>>
) -> CppBox<QAssociativeIterable>
The QAssociativeIterable class is an iterable interface for an associative container in a QVariant.
Calls C++ function: [constructor] void QAssociativeIterable::QAssociativeIterable(const QAssociativeIterable& other)
.
The QAssociativeIterable class is an iterable interface for an associative container in a QVariant.
This class allows several methods of accessing the elements of an associative container held within a QVariant. An instance of QAssociativeIterable can be extracted from a QVariant if it can be converted to a QVariantHash or QVariantMap.
QHash<int, QString> mapping; mapping.insert(7, "Seven"); mapping.insert(11, "Eleven"); mapping.insert(42, "Forty-two");
QVariant variant = QVariant::fromValue(mapping); if (variant.canConvert<QVariantHash>()) { QAssociativeIterable iterable = variant.value<QAssociativeIterable>(); // Can use foreach over the values: foreach (const QVariant &v, iterable) { qDebug() << v; } // Can use C++11 range-for over the values: for (const QVariant &v : iterable) { qDebug() << v; } // Can use iterators: QAssociativeIterable::const_iterator it = iterable.begin(); const QAssociativeIterable::const_iterator end = iterable.end(); for ( ; it != end; ++it) { qDebug() << *it; // The current value qDebug() << it.key(); qDebug() << it.value(); } }
The container itself is not copied before iterating over it.
pub unsafe fn size(&self) -> c_int
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Returns the number of elements in the container.
Calls C++ function: int QAssociativeIterable::size() const
.
Returns the number of elements in the container.
pub unsafe fn value(
&self,
key: impl CastInto<Ref<QVariant>>
) -> CppBox<QVariant>
[src]
&self,
key: impl CastInto<Ref<QVariant>>
) -> CppBox<QVariant>
Returns the value for the given key in the container, if the types are convertible.
Calls C++ function: QVariant QAssociativeIterable::value(const QVariant& key) const
.
Returns the value for the given key in the container, if the types are convertible.
See also find().
Trait Implementations
impl Begin for QAssociativeIterable
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type Output = CppBox<ConstIterator>
Output type.
unsafe fn begin(&self) -> CppBox<ConstIterator>
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Returns a QAssociativeIterable::const_iterator for the beginning of the container. This can be used in stl-style iteration.
Calls C++ function: QAssociativeIterable::const_iterator QAssociativeIterable::begin() const
.
Returns a QAssociativeIterable::const_iterator for the beginning of the container. This can be used in stl-style iteration.
See also end().
impl CppDeletable for QAssociativeIterable
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unsafe fn delete(&mut self)
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The QAssociativeIterable class is an iterable interface for an associative container in a QVariant.
Calls C++ function: [destructor] void QAssociativeIterable::~QAssociativeIterable()
.
The QAssociativeIterable class is an iterable interface for an associative container in a QVariant.
This class allows several methods of accessing the elements of an associative container held within a QVariant. An instance of QAssociativeIterable can be extracted from a QVariant if it can be converted to a QVariantHash or QVariantMap.
QHash<int, QString> mapping; mapping.insert(7, "Seven"); mapping.insert(11, "Eleven"); mapping.insert(42, "Forty-two");
QVariant variant = QVariant::fromValue(mapping); if (variant.canConvert<QVariantHash>()) { QAssociativeIterable iterable = variant.value<QAssociativeIterable>(); // Can use foreach over the values: foreach (const QVariant &v, iterable) { qDebug() << v; } // Can use C++11 range-for over the values: for (const QVariant &v : iterable) { qDebug() << v; } // Can use iterators: QAssociativeIterable::const_iterator it = iterable.begin(); const QAssociativeIterable::const_iterator end = iterable.end(); for ( ; it != end; ++it) { qDebug() << *it; // The current value qDebug() << it.key(); qDebug() << it.value(); } }
The container itself is not copied before iterating over it.
impl End for QAssociativeIterable
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type Output = CppBox<ConstIterator>
Output type.
unsafe fn end(&self) -> CppBox<ConstIterator>
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Returns a QAssociativeIterable::const_iterator for the end of the container. This can be used in stl-style iteration.
Calls C++ function: QAssociativeIterable::const_iterator QAssociativeIterable::end() const
.
Returns a QAssociativeIterable::const_iterator for the end of the container. This can be used in stl-style iteration.
See also begin().
impl Size for QAssociativeIterable
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Auto Trait Implementations
impl RefUnwindSafe for QAssociativeIterable
impl Send for QAssociativeIterable
impl Sync for QAssociativeIterable
impl Unpin for QAssociativeIterable
impl UnwindSafe for QAssociativeIterable
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> CastInto<U> for T where
U: CastFrom<T>,
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U: CastFrom<T>,
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> StaticUpcast<T> for T
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unsafe fn static_upcast(ptr: Ptr<T>) -> Ptr<T>
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unsafe fn static_upcast_mut(ptr: MutPtr<T>) -> MutPtr<T>
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,